Pub Date : 2026-01-26DOI: 10.1016/j.colsurfa.2026.139727
Zhipeng Tang , Sihua Meng , Wenyue Sun , Meijie Zhang , Kaiming Wu , Jun Zong , Tao Fu , Gang Zhang
Engineering robust interfaces via high-temperature solid-state reactions is fundamentally constrained by a conflict between reaction kinetics and interfacial integrity. Here, we establish a new design paradigm that resolves this trade-off: a single, intelligent additive that executes a temperature-programmed, dual-mode mechanism. Using the forsterite (Mg2SiO4) layer formation on grain-oriented electrical steel as a model system, we demonstrate that a strontia (SrO) additive first acts as a kinetic accelerant. At intermediate temperatures (∼470–800°C), it enables transient liquid-phase sintering to form a dense ceramic layer. Subsequently, at high temperatures (>1000°C), it transitions to an interfacial architect, driving the in-situ formation of composite (Sr, Ca)S/Sr2SiO4 nano-precipitates that scavenge sulfur from the steel substrate. This programmed sequence creates a strongly pinned interface, culminating in a 20 % reduction in core loss. This work provides a generalizable blueprint for designing programmable additives in advanced materials.
{"title":"Composite (Sr, Ca)S/Sr2SiO4 nano-precipitates formation via a temperature-programmed additive in forsterite layers on grain-oriented electrical steel","authors":"Zhipeng Tang , Sihua Meng , Wenyue Sun , Meijie Zhang , Kaiming Wu , Jun Zong , Tao Fu , Gang Zhang","doi":"10.1016/j.colsurfa.2026.139727","DOIUrl":"10.1016/j.colsurfa.2026.139727","url":null,"abstract":"<div><div>Engineering robust interfaces via high-temperature solid-state reactions is fundamentally constrained by a conflict between reaction kinetics and interfacial integrity. Here, we establish a new design paradigm that resolves this trade-off: a single, intelligent additive that executes a temperature-programmed, dual-mode mechanism. Using the forsterite (Mg<sub>2</sub>SiO<sub>4</sub>) layer formation on grain-oriented electrical steel as a model system, we demonstrate that a strontia (SrO) additive first acts as a kinetic accelerant. At intermediate temperatures (∼470–800°C), it enables transient liquid-phase sintering to form a dense ceramic layer. Subsequently, at high temperatures (>1000°C), it transitions to an interfacial architect, driving the <em>in-situ</em> formation of composite (Sr, Ca)S/Sr<sub>2</sub>SiO<sub>4</sub> nano-precipitates that scavenge sulfur from the steel substrate. This programmed sequence creates a strongly pinned interface, culminating in a 20 % reduction in core loss. This work provides a generalizable blueprint for designing programmable additives in advanced materials.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"737 ","pages":"Article 139727"},"PeriodicalIF":5.4,"publicationDate":"2026-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146076404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-25DOI: 10.1016/j.colsurfa.2026.139707
Nijat R. Gasimli , Hanif F. Yoga , Hamid Emami-Meybodi , Russell T. Johns
Accurate estimation of the optimum salinity is critical in many applications, including the design of effective surfactant flooding formulations. Although alcohol improves surfactant solubilization and interfacial behavior, its role is often simplified in existing optimum salinity correlations. This paper introduces an optimum salinity model that explicitly accounts for the alcohol volume fraction in surfactant–alcohol mixtures through multiplicative interaction coefficients among key formulation variables, including oil alkane carbon number (ACN), temperature (T), and alcohol fraction (CA). We conducted over 120 salinity scans (48 primary and 72 repetitive scans) using sodium dodecyl sulfate (SDS) (4.29 wt%) and n-butanol (17.16 wt%, 10.73 wt%, and 8.58 wt%) with a series of pure alkanes (n-heptane, n-octane, n-decane, and n-dodecane) across four temperatures of 21, 30, 45, and 60°C at a fixed water-oil ratio of one. Optimum salinities (S*) were determined from unbiased linear fits of the inverse of the three-phase solubilization data. Linear relationships are observed between lnS* and ACN, T, and CA. Although relationships are linear, the slopes were not always constant as other formulation variables changed, indicating potential interactions among CA, ACN, and T. Accordingly, we developed a multiplicative interaction model for optimum salinity, including all interaction terms to account for potential synergistic behavior. The results show a significant interaction between CA and ACN and a slight-to-moderate interaction between CA and T. All other interactions were negligible. Including these interactions improves the global fit of measured optimum salinity data by 23 % compared to the conventional linear additive model. Furthermore, errors of 100 % in the estimated optimum salinity are possible for alcohol fractions outside the range of experimental data.
{"title":"Multiplicative interaction model for optimum salinity in surfactant-alcohol-oil-water systems","authors":"Nijat R. Gasimli , Hanif F. Yoga , Hamid Emami-Meybodi , Russell T. Johns","doi":"10.1016/j.colsurfa.2026.139707","DOIUrl":"10.1016/j.colsurfa.2026.139707","url":null,"abstract":"<div><div>Accurate estimation of the optimum salinity is critical in many applications, including the design of effective surfactant flooding formulations. Although alcohol improves surfactant solubilization and interfacial behavior, its role is often simplified in existing optimum salinity correlations. This paper introduces an optimum salinity model that explicitly accounts for the alcohol volume fraction in surfactant–alcohol mixtures through multiplicative interaction coefficients among key formulation variables, including oil alkane carbon number (<em>ACN</em>), temperature (<em>T</em>), and alcohol fraction (<em>C</em><sub><em>A</em></sub>). We conducted over 120 salinity scans (48 primary and 72 repetitive scans) using sodium dodecyl sulfate (SDS) (4.29 wt%) and n-butanol (17.16 wt%, 10.73 wt%, and 8.58 wt%) with a series of pure alkanes (n-heptane, n-octane, n-decane, and n-dodecane) across four temperatures of 21, 30, 45, and 60°C at a fixed water-oil ratio of one. Optimum salinities (<em>S*</em>) were determined from unbiased linear fits of the inverse of the three-phase solubilization data. Linear relationships are observed between ln<em>S*</em> and <em>ACN</em>, <em>T</em>, and <em>C</em><sub><em>A</em></sub>. Although relationships are linear, the slopes were not always constant as other formulation variables changed, indicating potential interactions among <em>C</em><sub><em>A</em></sub>, <em>ACN</em>, and <em>T</em>. Accordingly, we developed a multiplicative interaction model for optimum salinity, including all interaction terms to account for potential synergistic behavior. The results show a significant interaction between <em>C<sub>A</sub></em> and <em>ACN</em> and a slight-to-moderate interaction between <em>C<sub>A</sub></em> and <em>T</em>. All other interactions were negligible. Including these interactions improves the global fit of measured optimum salinity data by 23 % compared to the conventional linear additive model. Furthermore, errors of 100 % in the estimated optimum salinity are possible for alcohol fractions outside the range of experimental data.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"737 ","pages":"Article 139707"},"PeriodicalIF":5.4,"publicationDate":"2026-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146045214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-24DOI: 10.1016/j.colsurfa.2026.139704
Aml E. Shrshr , Mohammed A. Al-Tahan , Meili Wang , Yutao Dong , Jiyu Wang , Chunjing Wang , Jianmin Zhang
Although lithium-sulfur (Li-S) batteries possess a theoretically high energy density, they face substantial limitations that hinder their commercialization and practical utilization. Two limitations are the slow kinetics of sulfur reactions and the lithium polysulfide (LiPSs) shuttle phenomenon. This research has advanced Li-S batteries by synthesizing and introducing a Fe-doped MoS2 and WO3 intercalated multilayer rGO composite (Fe-MoS2-WO3@rGO) as an electrocatalyst. WO₃ attaches to polysulfides, stopping dissolution into the electrolyte, while the MoS₂ promotes electron transport and strong binding at the separator. Doping the iron (Fe) element may expose additional anchoring active sites, which reduce the shuttle effect. Thus, the Fe-MoS2-WO3@rGO could balance polysulfide immobilization and catalytic activity, leading to high performance of the cell. The Li-S cell using a separator consisting of Fe-MoS2-WO3@rGO/PP delivers a significant capacity of 442 mAh g−1 after the 1000th cycle at 1.0 C. Moreover, under a substantial current of 5.0 C, the cell consistently retains a 415 mAh g−1 capacity for 700 cycles. Furthermore, the tri-layer sulfur cathode cell provides a capacity of 6.1 mAh cm−2 after completing the 100th cycle (under the condition of 8.19 mg cm−2 sulfur loading). The findings of this study demonstrate the successful construction and utilization of the Fe-MoS2-WO3@rGO functional mediator in Li-S cells, resulting in enhanced electrochemical performance. Besides, it facilitates the development of an innovative multi-layer cathode technology to boost the efficiency of Li-S cells.
虽然锂硫（Li-S）电池理论上具有高能量密度，但它们面临着阻碍其商业化和实际应用的实质性限制。两个限制是硫反应的缓慢动力学和锂多硫化物（LiPSs）穿梭现象。本研究通过合成并引入掺铁的MoS2和WO3插层多层氧化石墨烯复合材料（Fe-MoS2-WO3@rGO）作为电催化剂，推进了锂硫电池的发展。WO₃附着在多硫化物上，阻止其溶解到电解质中，而MoS₂促进电子传递和在分离器处的强结合。掺杂铁（Fe）元素可以暴露额外的锚定活性位点，从而减少穿梭效应。因此，Fe-MoS2-WO3@rGO可以平衡多硫化物的固定化和催化活性，从而实现电池的高性能。使用Fe-MoS2-WO3@rGO/PP组成的隔膜的Li-S电池在1.0 C下进行第1000次循环后可提供442 mAh g−1的显著容量。此外，在5.0 C的大电流下，电池在700次循环中始终保持415 mAh g - 1容量。此外，三层硫阴极电池在完成第100次循环后（在8.19 mg cm−2的硫负载条件下）提供了6.1 mAh cm−2的容量。本研究结果证明了Fe-MoS2-WO3@rGO功能介质在锂硫电池中的成功构建和利用，从而提高了锂硫电池的电化学性能。此外，它促进了创新的多层阴极技术的发展，以提高锂- s电池的效率。
{"title":"Enhancing the redox kinetics of Li-S cells with Fe-doped MoS2 and WO3 intercalated multilayer reduced graphene oxide as a multifunctional mediator","authors":"Aml E. Shrshr , Mohammed A. Al-Tahan , Meili Wang , Yutao Dong , Jiyu Wang , Chunjing Wang , Jianmin Zhang","doi":"10.1016/j.colsurfa.2026.139704","DOIUrl":"10.1016/j.colsurfa.2026.139704","url":null,"abstract":"<div><div>Although lithium-sulfur (Li-S) batteries possess a theoretically high energy density, they face substantial limitations that hinder their commercialization and practical utilization. Two limitations are the slow kinetics of sulfur reactions and the lithium polysulfide (LiPSs) shuttle phenomenon. This research has advanced Li-S batteries by synthesizing and introducing a Fe-doped MoS<sub>2</sub> and WO<sub>3</sub> intercalated multilayer rGO composite (Fe-MoS<sub>2</sub>-WO<sub>3</sub>@rGO) as an electrocatalyst. WO₃ attaches to polysulfides, stopping dissolution into the electrolyte, while the MoS₂ promotes electron transport and strong binding at the separator. Doping the iron (Fe) element may expose additional anchoring active sites, which reduce the shuttle effect. Thus, the Fe-MoS<sub>2</sub>-WO<sub>3</sub>@rGO could balance polysulfide immobilization and catalytic activity, leading to high performance of the cell. The Li-S cell using a separator consisting of Fe-MoS<sub>2</sub>-WO<sub>3</sub>@rGO/PP delivers a significant capacity of 442 mAh g<sup>−1</sup> after the 1000th cycle at 1.0 C. Moreover, under a substantial current of 5.0 C, the cell consistently retains a 415 mAh g<sup>−1</sup> capacity for 700 cycles. Furthermore, the tri-layer sulfur cathode cell provides a capacity of 6.1 mAh cm<sup>−2</sup> after completing the 100th cycle (under the condition of 8.19 mg cm<sup>−2</sup> sulfur loading). The findings of this study demonstrate the successful construction and utilization of the Fe-MoS<sub>2</sub>-WO<sub>3</sub>@rGO functional mediator in Li-S cells, resulting in enhanced electrochemical performance. Besides, it facilitates the development of an innovative multi-layer cathode technology to boost the efficiency of Li-S cells.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"737 ","pages":"Article 139704"},"PeriodicalIF":5.4,"publicationDate":"2026-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146045213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-24DOI: 10.1016/j.colsurfa.2026.139705
Beatris L. Mello , Pascal S. Thue , Glaydson S. dos Reis , Fernando M. Machado , Rachid El Kaim Billah , Moaaz K. Seliem , Younes Dehmani , Luis F.O. Silva , Eder C. Lima
Developing advanced carbonaceous adsorbents with engineered porosity is critical for addressing the global challenge of water contamination by persistent organic micropollutants (OMPs). In this study, we synthesized a series of 3D carbon nanostructure sponges (CS) derived from microcrystalline cellulose via a two-step carbonization and potassium hydroxide (KOH) activation process. By systematically varying the cellulose-to-KOH ratio from 1:1–1:4, we engineered the pore architecture from a strictly microporous framework to a highly hierarchical micro-mesoporous system. Extensive characterization using nitrogen adsorption–desorption isotherms, X-ray diffraction (XRD), Raman spectroscopy, Field Emission Scanning Electron Microscopy (FESEM), and Transmission Electron Microscopy (TEM) revealed that the optimal material (CS4) exhibits an exceptional Brunauer-Emmett-Teller (BET) specific surface area of 3007 m2 g−1 and a total pore volume of 1.37 cm3 g−1. Structural analysis resolved a crystallographic paradox: while XRD indicated a loss of long-range order, Raman spectroscopy and TEM confirmed the preservation of local graphitic domains within a highly crumpled, exfoliated nanosponge morphology. This unique structure proved decisive in the adsorption of diverse OMPs, including pharmaceuticals, phenols, and dyes. Adsorption assays demonstrated a strong structure-function relationship governed by size exclusion; while all adsorbents effectively removed small phenolic compounds (capacities ∼ 200 mg g−1), only the hierarchically porous CS4 could accommodate bulky dye molecules such as Direct Red 80 (60.6 mg g−1) and Reactive Green 19 (46.8 mg g−1), which were sterically hindered on the microporous CS1. The results establish cellulose-derived carbon nanosponges as sustainable, high-performance adsorbents with tunable porosity, offering a scalable solution for the remediation of complex wastewater matrices containing pollutants of varying molecular dimensions.
{"title":"Carbon sponge nanostructure derived from cellulose as an adsorbent for enhanced removal of organic contaminants","authors":"Beatris L. Mello , Pascal S. Thue , Glaydson S. dos Reis , Fernando M. Machado , Rachid El Kaim Billah , Moaaz K. Seliem , Younes Dehmani , Luis F.O. Silva , Eder C. Lima","doi":"10.1016/j.colsurfa.2026.139705","DOIUrl":"10.1016/j.colsurfa.2026.139705","url":null,"abstract":"<div><div>Developing advanced carbonaceous adsorbents with engineered porosity is critical for addressing the global challenge of water contamination by persistent organic micropollutants (OMPs). In this study, we synthesized a series of 3D carbon nanostructure sponges (CS) derived from microcrystalline cellulose via a two-step carbonization and potassium hydroxide (KOH) activation process. By systematically varying the cellulose-to-KOH ratio from 1:1–1:4, we engineered the pore architecture from a strictly microporous framework to a highly hierarchical micro-mesoporous system. Extensive characterization using nitrogen adsorption–desorption isotherms, X-ray diffraction (XRD), Raman spectroscopy, Field Emission Scanning Electron Microscopy (FESEM), and Transmission Electron Microscopy (TEM) revealed that the optimal material (CS4) exhibits an exceptional Brunauer-Emmett-Teller (BET) specific surface area of 3007 m<sup>2</sup> g<sup>−1</sup> and a total pore volume of 1.37 cm<sup>3</sup> g<sup>−1</sup>. Structural analysis resolved a crystallographic paradox: while XRD indicated a loss of long-range order, Raman spectroscopy and TEM confirmed the preservation of local graphitic domains within a highly crumpled, exfoliated <em>nanosponge</em> morphology. This unique structure proved decisive in the adsorption of diverse OMPs, including pharmaceuticals, phenols, and dyes. Adsorption assays demonstrated a strong structure-function relationship governed by size exclusion; while all adsorbents effectively removed small phenolic compounds (capacities ∼ 200 mg g<sup>−1</sup>), only the hierarchically porous CS4 could accommodate bulky dye molecules such as Direct Red 80 (60.6 mg g<sup>−1</sup>) and Reactive Green 19 (46.8 mg g<sup>−1</sup>), which were sterically hindered on the microporous CS1. The results establish cellulose-derived carbon nanosponges as sustainable, high-performance adsorbents with tunable porosity, offering a scalable solution for the remediation of complex wastewater matrices containing pollutants of varying molecular dimensions.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"737 ","pages":"Article 139705"},"PeriodicalIF":5.4,"publicationDate":"2026-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146076528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-24DOI: 10.1016/j.colsurfa.2026.139701
Dan Han , Jiaqian Sun , Yupeng Lu , Lu Wang , Jinping Wang , Rui Yang , Chunling Zuo , Xiaoshuang Chen
The development of durable noble metal-free catalysts is crucial for realizing cost-effective hydrogen production via electrocatalytic water splitting. This study reports the MoNi/FeNi3 alloy heterostructure as a bifunctional oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) electrocatalyst to bridge the laboratory-industry gap in water electrolysis. The MoNi/FeNi3 alloy composite with a hierarchically crosslinked network structure is prepared by a simply hydrothermal reaction and annealing technique. The network is composed of coarse nanosheets, which are further constituted by abundant nanoparticles. The formation of alloy heterophase significantly enhances the electrocatalytic active surface area and conductivity of material. The bifunctional MoNi/FeNi3 exhibits small overpotentials of 260.6 and 78.2 mV for OER and HER at 10 mA cm−2, low Tafel slopes of 30.6 and 50.3 mV dec−1, and good stability. Additionally, the two-electrode system assembled with MoNi/FeNi3 achieves steady and efficient output at industrial temperatures (50–80 ℃). This work provides a promising avenue for designing and fabricating water electrolysis catalysts.
开发耐用的无贵金属催化剂是实现低成本电催化水裂解制氢的关键。本研究报道了MoNi/FeNi3合金异质结构作为双功能析氧反应（OER）和析氢反应（HER）电催化剂，以弥合实验室和工业在水电解方面的差距。采用简单的水热反应和退火技术制备了具有层次交联网络结构的MoNi/FeNi3合金复合材料。该网络由粗纳米片组成，而粗纳米片又由丰富的纳米颗粒进一步构成。合金异相的形成显著提高了材料的电催化活性表面积和电导率。双功能MoNi/FeNi3在10 mA cm−2时，OER和HER的过电位分别为260.6和78.2 mV， Tafel斜率分别为30.6和50.3 mV dec−1，稳定性好。此外，用MoNi/FeNi3组装的双电极系统在工业温度（50-80℃）下可以实现稳定高效的输出。本研究为水电解催化剂的设计和制备提供了一条有前景的途径。
{"title":"In-situ construction of crosslinked MoNi/FeNi3 alloy heterostructure network as bifunctional electrocatalysts for overall water splitting","authors":"Dan Han , Jiaqian Sun , Yupeng Lu , Lu Wang , Jinping Wang , Rui Yang , Chunling Zuo , Xiaoshuang Chen","doi":"10.1016/j.colsurfa.2026.139701","DOIUrl":"10.1016/j.colsurfa.2026.139701","url":null,"abstract":"<div><div>The development of durable noble metal-free catalysts is crucial for realizing cost-effective hydrogen production via electrocatalytic water splitting. This study reports the MoNi/FeNi<sub>3</sub> alloy heterostructure as a bifunctional oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) electrocatalyst to bridge the laboratory-industry gap in water electrolysis. The MoNi/FeNi<sub>3</sub> alloy composite with a hierarchically crosslinked network structure is prepared by a simply hydrothermal reaction and annealing technique. The network is composed of coarse nanosheets, which are further constituted by abundant nanoparticles. The formation of alloy heterophase significantly enhances the electrocatalytic active surface area and conductivity of material. The bifunctional MoNi/FeNi<sub>3</sub> exhibits small overpotentials of 260.6 and 78.2 mV for OER and HER at 10 mA cm<sup>−2</sup>, low Tafel slopes of 30.6 and 50.3 mV dec<sup>−1</sup>, and good stability. Additionally, the two-electrode system assembled with MoNi/FeNi<sub>3</sub> achieves steady and efficient output at industrial temperatures (50–80 ℃). This work provides a promising avenue for designing and fabricating water electrolysis catalysts.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"737 ","pages":"Article 139701"},"PeriodicalIF":5.4,"publicationDate":"2026-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146076487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-23DOI: 10.1016/j.colsurfa.2026.139673
Zhaoyang Wu , Li Liu , Ze Hu , Rui Wang , Yang Liu , Zengqing Sun
As power electronic devices continue to evolve toward higher frequencies and greater power densities, the development of soft magnetic composites with low magnetic loss and high thermal dissipation efficiency has become increasingly critical. In this study, a facile in-situ synthesis strategy is proposed. By varying the KOH solution concentration between 0.5 and 2.5 mol/L, the aluminum component in FeSiAl powder reacts with KOH, and subsequent heat treatment facilitates the in-situ formation of an alumina insulating layer with high intrinsic thermal conductivity on the particle surface. The results indicate that the KOH concentration significantly influences the coating microstructure. At 2.0 mol/L, the Al2O3 layer exhibits a uniform thickness of approximately 410 nm, a dense morphology, and strong interfacial bonding with the matrix. The optimized composites exhibit excellent integrated properties, including a volume resistivity of 454.0 Ω·m, a low core loss of 143.8 kW/m3 at 10 mT and 500 kHz, and a notably improved thermal conductivity of 18.2 W·m−1·K−1. Finite element simulations and infrared thermography further demonstrate that, under practical operating conditions, the steady-state temperature of the optimized composite decreases by approximately 59℃ compared to the uncoated sample, representing a reduction of 26.6 %. In contrast, at a KOH concentration of 2.5 mol/L, the excessively thick coating and the formation of microcracks degrade performance. This work provides valuable insights and experimental guidance for the development of high-performance soft magnetic composites for next-generation high-frequency and high-power-density electronic applications.
{"title":"Synergistic enhancement of thermal conductivity and magnetic performance in FeSiAl soft magnetic composites via in-situ growth of Al2O3 insulating layer","authors":"Zhaoyang Wu , Li Liu , Ze Hu , Rui Wang , Yang Liu , Zengqing Sun","doi":"10.1016/j.colsurfa.2026.139673","DOIUrl":"10.1016/j.colsurfa.2026.139673","url":null,"abstract":"<div><div>As power electronic devices continue to evolve toward higher frequencies and greater power densities, the development of soft magnetic composites with low magnetic loss and high thermal dissipation efficiency has become increasingly critical. In this study, a facile in-situ synthesis strategy is proposed. By varying the KOH solution concentration between 0.5 and 2.5 mol/L, the aluminum component in FeSiAl powder reacts with KOH, and subsequent heat treatment facilitates the in-situ formation of an alumina insulating layer with high intrinsic thermal conductivity on the particle surface. The results indicate that the KOH concentration significantly influences the coating microstructure. At 2.0 mol/L, the Al<sub>2</sub>O<sub>3</sub> layer exhibits a uniform thickness of approximately 410 nm, a dense morphology, and strong interfacial bonding with the matrix. The optimized composites exhibit excellent integrated properties, including a volume resistivity of 454.0 Ω·m, a low core loss of 143.8 kW/m<sup>3</sup> at 10 mT and 500 kHz, and a notably improved thermal conductivity of 18.2 W·m<sup>−1</sup>·K<sup>−1</sup>. Finite element simulations and infrared thermography further demonstrate that, under practical operating conditions, the steady-state temperature of the optimized composite decreases by approximately 59℃ compared to the uncoated sample, representing a reduction of 26.6 %. In contrast, at a KOH concentration of 2.5 mol/L, the excessively thick coating and the formation of microcracks degrade performance. This work provides valuable insights and experimental guidance for the development of high-performance soft magnetic composites for next-generation high-frequency and high-power-density electronic applications.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"736 ","pages":"Article 139673"},"PeriodicalIF":5.4,"publicationDate":"2026-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146036302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-23DOI: 10.1016/j.colsurfa.2026.139697
Mingmin Jia , Wenhao Cao , Qiuxia Chen , Zhiyi Xia , Shuo Shi , Mingzhi Zheng , Hengyang Mao , Meisheng Li , Yijiang Zhao , Dingliang Dai , Jianhao Qiu
In this study, a g-C3N4/MoS2 composite membrane was successfully fabricated via electrostatic interactions and vacuum-assisted self-assembly. The established heterojunction markedly enhanced charge separation, yielding superior visible-light photocatalytic activity with 95.5 % methylene blue degradation in 150 min. The membrane also demonstrated efficient dye separation (70.8 % rejection for carmine red; 66.7 % for malachite green) and notable antifouling properties, achieving a 74.9 % flux recovery after visible-light cleaning. This work presents a synergistic strategy for simultaneous photocatalytic degradation and membrane separation in advanced water treatment.
{"title":"Visible-light-driven g-C3N4/MoS2 heterojunction membranes for synergistic photocatalysis and antifouling dye separation","authors":"Mingmin Jia , Wenhao Cao , Qiuxia Chen , Zhiyi Xia , Shuo Shi , Mingzhi Zheng , Hengyang Mao , Meisheng Li , Yijiang Zhao , Dingliang Dai , Jianhao Qiu","doi":"10.1016/j.colsurfa.2026.139697","DOIUrl":"10.1016/j.colsurfa.2026.139697","url":null,"abstract":"<div><div>In this study, a g-C<sub>3</sub>N<sub>4</sub>/MoS<sub>2</sub> composite membrane was successfully fabricated via electrostatic interactions and vacuum-assisted self-assembly. The established heterojunction markedly enhanced charge separation, yielding superior visible-light photocatalytic activity with 95.5 % methylene blue degradation in 150 min. The membrane also demonstrated efficient dye separation (70.8 % rejection for carmine red; 66.7 % for malachite green) and notable antifouling properties, achieving a 74.9 % flux recovery after visible-light cleaning. This work presents a synergistic strategy for simultaneous photocatalytic degradation and membrane separation in advanced water treatment.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"737 ","pages":"Article 139697"},"PeriodicalIF":5.4,"publicationDate":"2026-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146076625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-23DOI: 10.1016/j.colsurfa.2026.139676
Bing Zhao , Jiangyao Li , Mengjun Zhang , YingJun Qiao , Shiying Feng , Zhong Liu
Improving lithium adsorption materials to achieve both high capacity and fast kinetics remains a key challenge for efficient lithium recovery from complex aqueous sources. To overcome the inherent kinetic limitations of conventional bulk titanium-based ion sieves, we report a targeted design strategy involving the engineering of ultrathin H4Ti5O12 (HTO) nanoplates. The synthesized HTO nanoplates exhibited a high lithium uptake of 34.97 ± 0.66 mg/g (36 mM LiCl) and achieved an order-of-magnitude enhancement in kinetics, reaching equilibrium within only 2 h. Crucially, this study reveals the underlying Li+ selectivity mechanism through a comprehensive "two-step" theoretical framework. Density functional theory (DFT) calculations demonstrate that at the solid–liquid interface, Li+ facilitates partial dehydration due to its relatively lower hydration enthalpy and more positive hydrated adsorption energy compared to divalent ions (Mg2+ and Ca2+). Subsequently, within the crystal lattice, the 2D architecture provides a minimal migration barrier for Li+, while competing Na+ and K+ ions are effectively excluded via size-sieving effects. This synergy between thermodynamic preference and kinetic ease, coupled with excellent cycling stability (88.56 % retention), underscores the decisive role of morphology engineering in redefining the performance limits of ion-exchange materials. This work provides a high-throughput and scientifically grounded pathway for advanced lithium recovery from low-grade sources.
改善锂吸附材料以实现高容量和快速动力学仍然是从复杂水源中高效回收锂的关键挑战。为了克服传统大块钛基离子筛固有的动力学限制，我们报道了一种涉及超薄H4Ti5O12 （HTO）纳米板工程的有针对性的设计策略。合成的HTO纳米板具有34.97 ± 0.66 mg/g（36 mM LiCl）的高锂吸收率，并且在动力学上实现了数量级的增强，仅在2 h内达到平衡。至关重要的是，本研究通过一个全面的“两步”理论框架揭示了潜在的Li+选择性机制。密度泛函理论（DFT）计算表明，与二价离子（Mg2+和Ca2+）相比，Li+具有相对较低的水化焓和较高的正水化吸附能，有利于固液界面的部分脱水。随后，在晶格内，二维结构为Li+提供了最小的迁移屏障，而竞争的Na+和K+离子通过尺寸筛选效应被有效地排除在外。这种热力学偏好和动力学易于之间的协同作用，加上优异的循环稳定性（88.56 %保留率），强调了形态工程在重新定义离子交换材料性能极限方面的决定性作用。这项工作为从低品位资源中先进回收锂提供了一条高通量和科学基础的途径。
{"title":"Interfacial mechanism and kinetic characteristics of lithium adsorption on spinel titanium nanoplates","authors":"Bing Zhao , Jiangyao Li , Mengjun Zhang , YingJun Qiao , Shiying Feng , Zhong Liu","doi":"10.1016/j.colsurfa.2026.139676","DOIUrl":"10.1016/j.colsurfa.2026.139676","url":null,"abstract":"<div><div>Improving lithium adsorption materials to achieve both high capacity and fast kinetics remains a key challenge for efficient lithium recovery from complex aqueous sources. To overcome the inherent kinetic limitations of conventional bulk titanium-based ion sieves, we report a targeted design strategy involving the engineering of ultrathin H<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub> (HTO) nanoplates. The synthesized HTO nanoplates exhibited a high lithium uptake of 34.97 ± 0.66 mg/g (36 mM LiCl) and achieved an order-of-magnitude enhancement in kinetics, reaching equilibrium within only 2 h. Crucially, this study reveals the underlying Li<sup>+</sup> selectivity mechanism through a comprehensive \"two-step\" theoretical framework. Density functional theory (DFT) calculations demonstrate that at the solid–liquid interface, Li<sup>+</sup> facilitates partial dehydration due to its relatively lower hydration enthalpy and more positive hydrated adsorption energy compared to divalent ions (Mg<sup>2+</sup> and Ca<sup>2+</sup>). Subsequently, within the crystal lattice, the 2D architecture provides a minimal migration barrier for Li<sup>+</sup>, while competing Na<sup>+</sup> and K<sup>+</sup> ions are effectively excluded via size-sieving effects. This synergy between thermodynamic preference and kinetic ease, coupled with excellent cycling stability (88.56 % retention), underscores the decisive role of morphology engineering in redefining the performance limits of ion-exchange materials. This work provides a high-throughput and scientifically grounded pathway for advanced lithium recovery from low-grade sources.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"736 ","pages":"Article 139676"},"PeriodicalIF":5.4,"publicationDate":"2026-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146036341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-23DOI: 10.1016/j.colsurfa.2026.139646
Xinli Cao , Tongyu Yang , Yuna Zhao , Xu Wu , Zhe Lv , Zhiyong Hu , YongQiang Sun , Xuemei Ma
This study employed a gaseous SO3 falling filem sulphonation process, using modified alcohol polyoxyethylene-polyoxypropylene ether (M-AEO-2) bearing terminal propylene oxide (PO) units as the raw material. It successfully synthesized a novel modified anionic surfactant-modified fatty alcohol polyoxyethylene ether sulphate sodium salt (M-AES). Through systematic investigation of key sulfation parameters-including the molar ratio of SO3/M-AEO-2, SO3 concentration, and reaction temperature-optimal process conditions were established: a molar ratio of 1.02:1, SO3 concentration of 2.6 vol%, and reaction temperature of 40℃. Under these conditions, sulfation degree reached 99 %, while dioxane by-product residue was controlled at a low level of 22 ppm. Furthermore, the structure of the product M-AES (modified fatty alcohol polyoxyethylene–polyoxypropylene ether sulfate) was characterized using FT-IR, 1H NMR, and electrospray ionization mass spectrometry (ESI-MS) A comprehensive evaluation of M-AES physicochemical properties was conducted. Results indicate the product exhibits an exceptionally low Krafft point (<10℃) alongside outstanding low-temperature solubility (45 g/100 mL), coupled with remarkable surface activity (surface tension at the critical micelle concentration of 29.67 mN/m). Its emulsification stability is equally noteworthy, with soybean oil emulsion separation time extended to 19 min. Comparative tests on wetting properties, salt tolerance and detergency demonstrated M-AES superiority over conventional AES (fatty alcohol polyoxyethylene ether sulfate).
These exceptional characteristics indicate M-AES holds broad application prospects in low-temperature detergents,heavy-duty cleaning systems and other environmentally friendly formulations, serving as a high-performance alternative to traditional alcohol ether sulphates.
{"title":"Preparation and properties of sodium sulfate of modified fatty alcohol polyoxyethylene","authors":"Xinli Cao , Tongyu Yang , Yuna Zhao , Xu Wu , Zhe Lv , Zhiyong Hu , YongQiang Sun , Xuemei Ma","doi":"10.1016/j.colsurfa.2026.139646","DOIUrl":"10.1016/j.colsurfa.2026.139646","url":null,"abstract":"<div><div>This study employed a gaseous SO<sub>3</sub> falling filem sulphonation process, using modified alcohol polyoxyethylene-polyoxypropylene ether (M-AEO-2) bearing terminal propylene oxide (PO) units as the raw material. It successfully synthesized a novel modified anionic surfactant-modified fatty alcohol polyoxyethylene ether sulphate sodium salt (M-AES). Through systematic investigation of key sulfation parameters-including the molar ratio of SO<sub>3</sub>/M-AEO-2, SO<sub>3</sub> concentration, and reaction temperature-optimal process conditions were established: a molar ratio of 1.02:1, SO<sub>3</sub> concentration of 2.6 vol%, and reaction temperature of 40℃. Under these conditions, sulfation degree reached 99 %, while dioxane by-product residue was controlled at a low level of 22 ppm. Furthermore, the structure of the product M-AES (modified fatty alcohol polyoxyethylene–polyoxypropylene ether sulfate) was characterized using FT-IR, <sup>1</sup>H NMR, and electrospray ionization mass spectrometry (ESI-MS) A comprehensive evaluation of M-AES physicochemical properties was conducted. Results indicate the product exhibits an exceptionally low Krafft point (<10℃) alongside outstanding low-temperature solubility (45 g/100 mL), coupled with remarkable surface activity (surface tension at the critical micelle concentration of 29.67 mN/m). Its emulsification stability is equally noteworthy, with soybean oil emulsion separation time extended to 19 min. Comparative tests on wetting properties, salt tolerance and detergency demonstrated M-AES superiority over conventional AES (fatty alcohol polyoxyethylene ether sulfate).</div><div>These exceptional characteristics indicate M-AES holds broad application prospects in low-temperature detergents,heavy-duty cleaning systems and other environmentally friendly formulations, serving as a high-performance alternative to traditional alcohol ether sulphates.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"737 ","pages":"Article 139646"},"PeriodicalIF":5.4,"publicationDate":"2026-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146076504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-23DOI: 10.1016/j.colsurfa.2026.139699
Jiabo Huang , Zhentao Wang , Wei Xiang , Jue Wang , Kai Yu , Qingming Dong , Junfeng Wang , Jiyuan Tu
Liquid membrane separation technology is widely applied in industrial, biological, medical, and food fields. The insight into dynamic behavior of droplets impacting free-standing liquid membranes is crucial for revealing separation mechanisms and optimizing separation performance. In this work, molecular dynamic simulation is employed to study the impact of nano-droplets containing the ionic surfactants SDS and CTAB on free-standing liquid membranes. The effect of impact velocity, surfactant type, and surfactant concentration on three distinct regimes including coalescence, bouncing and passing are examined. The results show that at low impact velocity, the coalescence regime dominates, characterized by damped oscillations of the droplet. Increasing the impact velocity facilitates coalescence, whereas increasing the surfactant concentration suppresses. At the nanoscale, bouncing occurs only when the surfactant concentration in the droplet exceeds a critical threshold. This behavior arises because surfactants can weaken the attractive interactions between the droplet water molecules and the liquid membrane. Bouncing is achieved when the interfacial coverage of SDS exceeds 7 molecules/nm², while for CTAB, bouncing could not be induced due to its stronger attraction to the membrane. Additionally, the presence of surfactants in the membrane itself further inhibits bouncing. The passing regime occurs at high impact velocity, with the morphology of the resulting liquid filament strongly dependent on the impact velocity. Surfactants reduce the critical velocity required for passing and influence droplet deformation behavior. Overall, this work elucidates how surfactants regulate droplet membrane interactions at the microscopic scale, providing theoretical insights into nanoscale droplet-membrane dynamics.
{"title":"Molecular dynamics study of ionic surfactant droplets impacting free-standing liquid membrane","authors":"Jiabo Huang , Zhentao Wang , Wei Xiang , Jue Wang , Kai Yu , Qingming Dong , Junfeng Wang , Jiyuan Tu","doi":"10.1016/j.colsurfa.2026.139699","DOIUrl":"10.1016/j.colsurfa.2026.139699","url":null,"abstract":"<div><div>Liquid membrane separation technology is widely applied in industrial, biological, medical, and food fields. The insight into dynamic behavior of droplets impacting free-standing liquid membranes is crucial for revealing separation mechanisms and optimizing separation performance. In this work, molecular dynamic simulation is employed to study the impact of nano-droplets containing the ionic surfactants SDS and CTAB on free-standing liquid membranes. The effect of impact velocity, surfactant type, and surfactant concentration on three distinct regimes including coalescence, bouncing and passing are examined. The results show that at low impact velocity, the coalescence regime dominates, characterized by damped oscillations of the droplet. Increasing the impact velocity facilitates coalescence, whereas increasing the surfactant concentration suppresses. At the nanoscale, bouncing occurs only when the surfactant concentration in the droplet exceeds a critical threshold. This behavior arises because surfactants can weaken the attractive interactions between the droplet water molecules and the liquid membrane. Bouncing is achieved when the interfacial coverage of SDS exceeds 7 molecules/nm², while for CTAB, bouncing could not be induced due to its stronger attraction to the membrane. Additionally, the presence of surfactants in the membrane itself further inhibits bouncing. The passing regime occurs at high impact velocity, with the morphology of the resulting liquid filament strongly dependent on the impact velocity. Surfactants reduce the critical velocity required for passing and influence droplet deformation behavior. Overall, this work elucidates how surfactants regulate droplet membrane interactions at the microscopic scale, providing theoretical insights into nanoscale droplet-membrane dynamics.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"736 ","pages":"Article 139699"},"PeriodicalIF":5.4,"publicationDate":"2026-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146036389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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