Colloids and Surfaces A: Physicochemical and Engineering Aspects最新文献

A durable anti-corrosion and anti-fouling polyurea coating with oil-infused superhydrophobic diatomaceous earth@SiO2 cells

IF 4.9 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2025-03-06 DOI: 10.1016/j.colsurfa.2025.136569

Qiang Zhang , Zhongtian Yang , Yage Xia , Junxu Chen , Yanzheng Ji , Juan Li , Huimin Liu , Xinquan Yu , Youfa Zhang

Slippery liquid-infused porous surfaces (SLIPS) have excellent hydrophobicity, low adhesion, and self-healing, showing potential applications prospects in the fields of self-cleaning, anti-corrosion, anti-biofouling, and drag reduction. However, the current SLIPS surface has problems such as complicated preparation process and easy loss of lubricant, which seriously restricts its practical application. In this paper, hydrophobic modified superhydrophobic diatomaceous earth@SiO₂ cell loaded with silicone oil were firstly prepared, and then mixed with polyurea resin and curing agent to prepare a novel slippery lubricated oil-infused anti-corrosion and anti-fouling polyurea coating (SLIC).The impedance modulus (|Z|_0.01_Hz) of the SLIC-coated Q235B steel plate in simulated seawater (3.5 wt% NaCl aqueous solution) reaches 10¹⁰ Ω·cm² order of magnitude; Additionally, the glass samples coated with SLIC coatings showed only 0.18 % bacteria coverage rate after 72 hours of incubation in E. coli culture solution, and only 0.10 %, 0.29 % and 0.53 % coverage of Chlorella after 5, 10 and 15 days of incubation in Chlorella culture solution. The SLIC coatings are also simple to prepare, low-cost, and versatile, with excellent robustness, durability and self-cleaning, thereby presenting potential application prospects in the fields of ships and marine engineering.

{"title":"A durable anti-corrosion and anti-fouling polyurea coating with oil-infused superhydrophobic diatomaceous earth@SiO2 cells","authors":"Qiang Zhang , Zhongtian Yang , Yage Xia , Junxu Chen , Yanzheng Ji , Juan Li , Huimin Liu , Xinquan Yu , Youfa Zhang","doi":"10.1016/j.colsurfa.2025.136569","DOIUrl":"10.1016/j.colsurfa.2025.136569","url":null,"abstract":"<div><div>Slippery liquid-infused porous surfaces (SLIPS) have excellent hydrophobicity, low adhesion, and self-healing, showing potential applications prospects in the fields of self-cleaning, anti-corrosion, anti-biofouling, and drag reduction. However, the current SLIPS surface has problems such as complicated preparation process and easy loss of lubricant, which seriously restricts its practical application. In this paper, hydrophobic modified superhydrophobic diatomaceous earth@SiO<sub>2</sub> cell loaded with silicone oil were firstly prepared, and then mixed with polyurea resin and curing agent to prepare a novel slippery lubricated oil-infused anti-corrosion and anti-fouling polyurea coating (SLIC).The impedance modulus (|Z|<sub>0.01</sub><sub>Hz</sub>) of the SLIC-coated Q235B steel plate in simulated seawater (3.5 wt% NaCl aqueous solution) reaches 10<sup>10</sup> Ω·cm<sup>2</sup> order of magnitude; Additionally, the glass samples coated with SLIC coatings showed only 0.18 % bacteria coverage rate after 72 hours of incubation in E. coli culture solution, and only 0.10 %, 0.29 % and 0.53 % coverage of Chlorella after 5, 10 and 15 days of incubation in Chlorella culture solution. The SLIC coatings are also simple to prepare, low-cost, and versatile, with excellent robustness, durability and self-cleaning, thereby presenting potential application prospects in the fields of ships and marine engineering.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"714 ","pages":"Article 136569"},"PeriodicalIF":4.9,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143562105","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}

引用次数: 0

Synergistic effect of a bio-based mixed depressant on flotation separation of scheelite from calcium gangue

IF 4.9 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2025-03-04 DOI: 10.1016/j.colsurfa.2025.136555

Xiaomeng Yang , Jinpan Bao , Dan Wu , Yijun Cao , Haiqing Hao , Yongsheng Zhang

To achieve the high-efficient and selective flotation separation of scheelite from calcium gangue, mixed depressant, SML/CMC, was designed and used. The novel depressant was biomass-based and eco-friendly. It consists of sulfomethylated alkali lignin and sodium carboxymethyl cellulose with the mass ratio of 5:1. The synergistic effect of the depressants were explored. With the mixed depressant, the recovery of scheelite reached 81.23 % with 50 mg/L of SML/CMC at pH = 11, while the recoveries of fluorite and calcite were 3.63 and 14.70 %, respectively. The contact angle, zeta potential, FTIR, and XPS were used to compare the changes in surface properties of the minerals caused by SML/CMC. The calcium ions on mineral surfaces were the main active sites for the adsorption of SML/CMC. The depressing effect of SML and CMC on calcite gangue was attributed to the reaction between calcium ions and functional group of SO₃^2- and −RCOO^-. The novel and bio-based mixed depressant, SML/CMC, exhibited higher selectivity, as it integrated the high selectivity of SML and the strong depressing ability of CMC. With the mixed depressant, the separation of scheelite from fluorite and calcite was improved. The research provided a kind of green depressant for high-efficiency recovery of scheelite, as well as the basis for design of high-efficiency depressant.

{"title":"Synergistic effect of a bio-based mixed depressant on flotation separation of scheelite from calcium gangue","authors":"Xiaomeng Yang , Jinpan Bao , Dan Wu , Yijun Cao , Haiqing Hao , Yongsheng Zhang","doi":"10.1016/j.colsurfa.2025.136555","DOIUrl":"10.1016/j.colsurfa.2025.136555","url":null,"abstract":"<div><div>To achieve the high-efficient and selective flotation separation of scheelite from calcium gangue, mixed depressant, SML/CMC, was designed and used. The novel depressant was biomass-based and eco-friendly. It consists of sulfomethylated alkali lignin and sodium carboxymethyl cellulose with the mass ratio of 5:1. The synergistic effect of the depressants were explored. With the mixed depressant, the recovery of scheelite reached 81.23 % with 50 mg/L of SML/CMC at pH = 11, while the recoveries of fluorite and calcite were 3.63 and 14.70 %, respectively. The contact angle, zeta potential, FTIR, and XPS were used to compare the changes in surface properties of the minerals caused by SML/CMC. The calcium ions on mineral surfaces were the main active sites for the adsorption of SML/CMC. The depressing effect of SML and CMC on calcite gangue was attributed to the reaction between calcium ions and functional group of SO<sub>3</sub><sup>2-</sup> and −RCOO<sup>-</sup>. The novel and bio-based mixed depressant, SML/CMC, exhibited higher selectivity, as it integrated the high selectivity of SML and the strong depressing ability of CMC. With the mixed depressant, the separation of scheelite from fluorite and calcite was improved. The research provided a kind of green depressant for high-efficiency recovery of scheelite, as well as the basis for design of high-efficiency depressant.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"713 ","pages":"Article 136555"},"PeriodicalIF":4.9,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143549865","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}

引用次数: 0

Highly active FeNiOOH nanoflower structured catalyst achieving efficient oxygen evolution reaction under industrial strong alkaline conditions

IF 4.9 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2025-03-04 DOI: 10.1016/j.colsurfa.2025.136559

Jing Wang , Wenjing Dai , Yan Wang , Zikang Zhao , Tianxiao Xie , Yide Luo , Zongtai Zhou , Junshuang Zhou , Faming Gao

The generation of green hydrogen is considered one of the most promising methods to address energy issues. This study synthesized a FeNiOOH catalyst with a two-dimensional nanoflower structure on a nickel foam substrate via a hydrothermal method, demonstrating excellent oxygen evolution reaction (OER) activity. At a current density of 10 mA cm^-², the OER overpotential of FeNiOOH is 265 mV. The specific surface area of FeNiOOH can reach 65 m² g^-¹ , with a pore size distribution of 6.5 nm, allowing for more significant adsorption of hydroxide ions (OH^-) on the surface. Concentration activity coefficients indicate that the activity of FeNiOOH catalysts is more sensitive to changes in KOH concentration. As the concentration of KOH solution increases, the high-valent NiOOH/FeOOH in the FeNiOOH catalyst exhibits good adaptability to alkaline solutions, achieving a mass activity of 263 A g^-¹ in 6 M KOH solution, which is a 5.9-fold increase compared to the 1 M testing condition (44.3 A g^-¹). Furthermore, after 5000 CV cycles, there was no performance degradation, and after a 30-hour chronopotentiometry evaluation, the potential degradation of the catalyst was negligible, demonstrating excellent stability. This study provides insights into the rational design of high-activity and high-stability OER catalysts and lays a foundation for developing efficient catalysts under industrial-scale conditions.

{"title":"Highly active FeNiOOH nanoflower structured catalyst achieving efficient oxygen evolution reaction under industrial strong alkaline conditions","authors":"Jing Wang , Wenjing Dai , Yan Wang , Zikang Zhao , Tianxiao Xie , Yide Luo , Zongtai Zhou , Junshuang Zhou , Faming Gao","doi":"10.1016/j.colsurfa.2025.136559","DOIUrl":"10.1016/j.colsurfa.2025.136559","url":null,"abstract":"<div><div>The generation of green hydrogen is considered one of the most promising methods to address energy issues. This study synthesized a FeNiOOH catalyst with a two-dimensional nanoflower structure on a nickel foam substrate via a hydrothermal method, demonstrating excellent oxygen evolution reaction (OER) activity. At a current density of 10 mA cm<sup>-</sup>², the OER overpotential of FeNiOOH is 265 mV. The specific surface area of FeNiOOH can reach 65 m<sup>2</sup> g<sup>-</sup>¹ , with a pore size distribution of 6.5 nm, allowing for more significant adsorption of hydroxide ions (OH<sup>-</sup>) on the surface. Concentration activity coefficients indicate that the activity of FeNiOOH catalysts is more sensitive to changes in KOH concentration. As the concentration of KOH solution increases, the high-valent NiOOH/FeOOH in the FeNiOOH catalyst exhibits good adaptability to alkaline solutions, achieving a mass activity of 263 A g<sup>-</sup>¹ in 6 M KOH solution, which is a 5.9-fold increase compared to the 1 M testing condition (44.3 A g<sup>-</sup>¹). Furthermore, after 5000 CV cycles, there was no performance degradation, and after a 30-hour chronopotentiometry evaluation, the potential degradation of the catalyst was negligible, demonstrating excellent stability. This study provides insights into the rational design of high-activity and high-stability OER catalysts and lays a foundation for developing efficient catalysts under industrial-scale conditions.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"713 ","pages":"Article 136559"},"PeriodicalIF":4.9,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143549870","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}

引用次数: 0

Enhanced removal of methylene blue from water using mercaptosuccinic acid-functionalized PS-DVB-g-PGMA polymer

IF 4.9 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2025-03-04 DOI: 10.1016/j.colsurfa.2025.136560

İfaket İlayda Köse , Aslı Erdem Yayayürük , Pınar Özdemir , İlayda Koramaz , Bünyamin Karagöz , Onur Yayayürük

In this study, a polystyrene-divinylbenzene-vinylbenzyl chloride (PS-DVB-VBC) polymer sorbent was synthesized and functionalized with glycidyl methacrylate (GMA) via surface-initiated polymerization, achieving an epoxy group content of 64 %. The epoxy-functionalized polymer was further modified by reacting with mercaptosuccinic acid to enhance its adsorption performance for methylene blue (MB) removal from aqueous solutions. Characterization results confirmed the successful synthesis and functionalization of the sorbent, revealing a mesoporous structure with an average pore diameter of 4.8 nm and a BET surface area of 0.9144 m² g⁻¹. Sorption experiments were conducted under varying conditions, including pH (2−12), initial MB concentrations (1–20 mg L⁻¹), sorbent dosages (10–50 mg), contact times (1–240 min), and temperatures (298–338 K). Kinetic analysis showed that the pseudo-second-order model (R² = 0.9997) best described the adsorption process, while equilibrium data aligned well with the Langmuir isotherm (R² = 0.9996), indicating monolayer adsorption with a maximum capacity of 6.27 mg g⁻¹. Thermodynamic studies confirmed a spontaneous and exothermic (ΔH° = −2.64 kJ mol⁻¹) adsorption process. The polymer sorbent demonstrated excellent adsorption performance in ultrapure water (UPW) and tap water (TW), achieving over 95 % removal efficiency, while maintaining significant MB removal in industrial wastewaters (IWWs), despite the presence of competing contaminants. These results highlight the potential of the developed sorbent for practical wastewater treatment applications.

{"title":"Enhanced removal of methylene blue from water using mercaptosuccinic acid-functionalized PS-DVB-g-PGMA polymer","authors":"İfaket İlayda Köse , Aslı Erdem Yayayürük , Pınar Özdemir , İlayda Koramaz , Bünyamin Karagöz , Onur Yayayürük","doi":"10.1016/j.colsurfa.2025.136560","DOIUrl":"10.1016/j.colsurfa.2025.136560","url":null,"abstract":"<div><div>In this study, a polystyrene-divinylbenzene-vinylbenzyl chloride (PS-DVB-VBC) polymer sorbent was synthesized and functionalized with glycidyl methacrylate (GMA) via surface-initiated polymerization, achieving an epoxy group content of 64 %. The epoxy-functionalized polymer was further modified by reacting with mercaptosuccinic acid to enhance its adsorption performance for methylene blue (MB) removal from aqueous solutions. Characterization results confirmed the successful synthesis and functionalization of the sorbent, revealing a mesoporous structure with an average pore diameter of 4.8 nm and a BET surface area of 0.9144 m² g<sup>−1</sup>. Sorption experiments were conducted under varying conditions, including pH (2−12), initial MB concentrations (1–20 mg L<sup>−1</sup>), sorbent dosages (10–50 mg), contact times (1–240 min), and temperatures (298–338 K). Kinetic analysis showed that the pseudo-second-order model (R² = 0.9997) best described the adsorption process, while equilibrium data aligned well with the Langmuir isotherm (R² = 0.9996), indicating monolayer adsorption with a maximum capacity of 6.27 mg g<sup>−1</sup>. Thermodynamic studies confirmed a spontaneous and exothermic (Δ<em>H</em>° = −2.64 kJ mol<sup>−1</sup>) adsorption process. The polymer sorbent demonstrated excellent adsorption performance in ultrapure water (UPW) and tap water (TW), achieving over 95 % removal efficiency, while maintaining significant MB removal in industrial wastewaters (IWWs), despite the presence of competing contaminants. These results highlight the potential of the developed sorbent for practical wastewater treatment applications.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"713 ","pages":"Article 136560"},"PeriodicalIF":4.9,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143549881","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}

引用次数: 0

One-step in situ growth of heterojunction carbon dots-TiO2/ZIF-8 on the surface of meltblown fibers: Towards recyclable photocatalysts for degradation of organic dyes

IF 4.9 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2025-03-04 DOI: 10.1016/j.colsurfa.2025.136568

Wei Wang , Cong Shen , Ruiqi Shao , Yanlong Zhu , Wenze Yu , Xianyan Wu , Wensheng Huang , Kai Li , Zhiwei Xu

Conventional photocatalysts utilized in the photodegradation of organic dyes are prone to cause agglomeration of nanocatalysts, which affects the photocatalytic efficiency and is difficult to recycle. In this paper, photocatalysts were rapidly loaded onto polypropylene (PP) meltblown nonwoven material fibers possessing a large specific surface area using water as a solvent and a one-step in situ growth method under ultrasonic conditions. That is, by ultrasonically and rapidly growing zeolite imidazolium skeleton material (ZIF-8) in situ on the surface of dopamine-modified PP meltblown fibers and directly doping carbon dots (CDs) modified TiO₂ during the in situ growth of ZIF-8, a CDs-TiO₂/ZIF-8/PP composite photocatalytic material was formed. The microstructure, chemical structure, and photocatalytic performance of CDs-TiO₂/ZIF-8/PP composite photocatalytic material were characterized. The findings indicated that the CDs-TiO₂/ZIF-8 heterojunction nanocatalysts were effectively loaded onto the exterior of PP meltblown fibers. The CDs-TiO₂/ZIF-8/PP composite photocatalytic materials exhibited highly efficient and synergistic photocatalytic degradation of the anionic dye Congo red (CR). Upon exposure to visible light, the degradation of CR could reach 99.1 % within 100 min and 99.6 % within 120 min. The first-order kinetic constant for photocatalytic degradation was measured to be 0.0419 min⁻¹. Furthermore, the photodegradation of CR by the CDs-TiO₂/ZIF-8/PP composite photocatalytic material maintained about 85 % after 5 cycles. Finally, the mechanism of in situ deposition and photocatalytic activity of the nanocomposites on the fiber surface was proposed. The composite photocatalytic material can be recycled, and the preparation process is green, simple, and efficient, which has potential application prospects for industrial wastewater treatment.

{"title":"One-step in situ growth of heterojunction carbon dots-TiO2/ZIF-8 on the surface of meltblown fibers: Towards recyclable photocatalysts for degradation of organic dyes","authors":"Wei Wang , Cong Shen , Ruiqi Shao , Yanlong Zhu , Wenze Yu , Xianyan Wu , Wensheng Huang , Kai Li , Zhiwei Xu","doi":"10.1016/j.colsurfa.2025.136568","DOIUrl":"10.1016/j.colsurfa.2025.136568","url":null,"abstract":"<div><div>Conventional photocatalysts utilized in the photodegradation of organic dyes are prone to cause agglomeration of nanocatalysts, which affects the photocatalytic efficiency and is difficult to recycle. In this paper, photocatalysts were rapidly loaded onto polypropylene (PP) meltblown nonwoven material fibers possessing a large specific surface area using water as a solvent and a one-step in situ growth method under ultrasonic conditions. That is, by ultrasonically and rapidly growing zeolite imidazolium skeleton material (ZIF-8) in situ on the surface of dopamine-modified PP meltblown fibers and directly doping carbon dots (CDs) modified TiO<sub>2</sub> during the in situ growth of ZIF-8, a CDs-TiO<sub>2</sub>/ZIF-8/PP composite photocatalytic material was formed. The microstructure, chemical structure, and photocatalytic performance of CDs-TiO<sub>2</sub>/ZIF-8/PP composite photocatalytic material were characterized. The findings indicated that the CDs-TiO<sub>2</sub>/ZIF-8 heterojunction nanocatalysts were effectively loaded onto the exterior of PP meltblown fibers. The CDs-TiO<sub>2</sub>/ZIF-8/PP composite photocatalytic materials exhibited highly efficient and synergistic photocatalytic degradation of the anionic dye Congo red (CR). Upon exposure to visible light, the degradation of CR could reach 99.1 % within 100 min and 99.6 % within 120 min. The first-order kinetic constant for photocatalytic degradation was measured to be 0.0419 min⁻<sup>1</sup>. Furthermore, the photodegradation of CR by the CDs-TiO<sub>2</sub>/ZIF-8/PP composite photocatalytic material maintained about 85 % after 5 cycles. Finally, the mechanism of in situ deposition and photocatalytic activity of the nanocomposites on the fiber surface was proposed. The composite photocatalytic material can be recycled, and the preparation process is green, simple, and efficient, which has potential application prospects for industrial wastewater treatment.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"714 ","pages":"Article 136568"},"PeriodicalIF":4.9,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552007","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}

引用次数: 0

Co-effects from inorganic and organic fractions in dissolved components of biochar on its adsorption behavior: Taking uranium adsorption as an example

IF 4.9 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2025-03-03 DOI: 10.1016/j.colsurfa.2025.136546

Xujing Guo , Lijun Yang , Zhixu Du , Haiqin Zhou , Liang Li , Wenkun Zhu , Lichun Dai

Biochar could release water-soluble fraction (WSF), including intrinsic dissolved organic matter (BDOM) and soluble minerals simultaneously. However, the co-effects from the inorganic and organic fractions in the WSF of biochar are always overlooked during its environmental application. Herein, this study specified the direct roles of BDOM and soluble minerals in the WSF from biochar on uranium (U(VI)) adsorption, and the indirect roles of WSF on the evolution of interfacial behavior of biochar toward U(VI) after the release of WSF. The results show that BDOM and soluble minerals (e.g., phosphate) in WSF contribute directly to U(VI) precipitation, which accounted for 8.94 % - 34.12 % of the U(VI) removals by the bulk biochars. Specifically, U(VI) precipitation by the WSF from the low temperature biochar prepared at 300 °C (B300) is presumably dominated by BDOM, while the U(VI) precipitation by the WSF from the high temperature biochar prepared at 600 °C (B600 and OB600) is presumably governed by leached phosphate. Furthermore, the dissolution of WSF indirectly changes the adsorption behavior toward U(VI) through the change of surface functionality and exposure of insoluble U(VI)-binding minerals. Finally, this study provides new insights into co-effects of inorganic and organic fractions in biochar WSF on its adsorption behavior, suggesting that the WSF (including BDOM and soluble minerals) in biochar deserves more attention when the biochar is designed for environmental applications.

{"title":"Co-effects from inorganic and organic fractions in dissolved components of biochar on its adsorption behavior: Taking uranium adsorption as an example","authors":"Xujing Guo , Lijun Yang , Zhixu Du , Haiqin Zhou , Liang Li , Wenkun Zhu , Lichun Dai","doi":"10.1016/j.colsurfa.2025.136546","DOIUrl":"10.1016/j.colsurfa.2025.136546","url":null,"abstract":"<div><div>Biochar could release water-soluble fraction (WSF), including intrinsic dissolved organic matter (BDOM) and soluble minerals simultaneously. However, the co-effects from the inorganic and organic fractions in the WSF of biochar are always overlooked during its environmental application. Herein, this study specified the direct roles of BDOM and soluble minerals in the WSF from biochar on uranium (U(VI)) adsorption, and the indirect roles of WSF on the evolution of interfacial behavior of biochar toward U(VI) after the release of WSF. The results show that BDOM and soluble minerals (e.g., phosphate) in WSF contribute directly to U(VI) precipitation, which accounted for 8.94 % - 34.12 % of the U(VI) removals by the bulk biochars. Specifically, U(VI) precipitation by the WSF from the low temperature biochar prepared at 300 °C (B300) is presumably dominated by BDOM, while the U(VI) precipitation by the WSF from the high temperature biochar prepared at 600 °C (B600 and OB600) is presumably governed by leached phosphate. Furthermore, the dissolution of WSF indirectly changes the adsorption behavior toward U(VI) through the change of surface functionality and exposure of insoluble U(VI)-binding minerals. Finally, this study provides new insights into co-effects of inorganic and organic fractions in biochar WSF on its adsorption behavior, suggesting that the WSF (including BDOM and soluble minerals) in biochar deserves more attention when the biochar is designed for environmental applications.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"713 ","pages":"Article 136546"},"PeriodicalIF":4.9,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143534063","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}

引用次数: 0

The electrowetting-on-dielectric and photothermal performance of the porous Ti3C2@PVDF composite and dehumidification application

IF 4.9 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2025-03-03 DOI: 10.1016/j.colsurfa.2025.136556

Ping Yang, Jian Wang, Fei Ning, Long Qi, Jianbiao Chen, Xuqiang Zhang

The work environment of EWOD devices is becoming increasingly complex, and achieving high-efficiency dehumidification remains a significant challenge for their reuse. In this study, Mxene Ti₃C₂ nanosheets were prepared, embedded into PVDF, and immersed in DMF for approximately 20 seconds, resulting in the formation of porous Ti₃C₂@PVDF composites. The initial water contact angle (CA) reaches approximately 145.9º. The uniform dispersion of Ti₃C₂ nanosheets at an optimal mass fraction of 3 wt% in PVDF increases the dielectric constant nearly fourfold through space charge polarization, thereby enhancing EWOD performance. Specifically, the CA modulation reaches nearly 116.5º, and the relaxation time decreases from 0.756 seconds to 0.487 seconds. Additionally, the Ti₃C₂@PVDF composite exhibited excellent photothermal properties. Combining these properties with superior EWOD responses, the Ti₃C₂@PVDF composite was successfully applied to achieve highly efficient dehumidification in Ti₃C₂@PVDF-based EWOD devices.

{"title":"The electrowetting-on-dielectric and photothermal performance of the porous Ti3C2@PVDF composite and dehumidification application","authors":"Ping Yang, Jian Wang, Fei Ning, Long Qi, Jianbiao Chen, Xuqiang Zhang","doi":"10.1016/j.colsurfa.2025.136556","DOIUrl":"10.1016/j.colsurfa.2025.136556","url":null,"abstract":"<div><div>The work environment of EWOD devices is becoming increasingly complex, and achieving high-efficiency dehumidification remains a significant challenge for their reuse. In this study, Mxene Ti<sub>3</sub>C<sub>2</sub> nanosheets were prepared, embedded into PVDF, and immersed in DMF for approximately 20 seconds, resulting in the formation of porous Ti<sub>3</sub>C<sub>2</sub>@PVDF composites. The initial water contact angle (CA) reaches approximately 145.9º. The uniform dispersion of Ti<sub>3</sub>C<sub>2</sub> nanosheets at an optimal mass fraction of 3 wt% in PVDF increases the dielectric constant nearly fourfold through space charge polarization, thereby enhancing EWOD performance. Specifically, the CA modulation reaches nearly 116.5º, and the relaxation time decreases from 0.756 seconds to 0.487 seconds. Additionally, the Ti<sub>3</sub>C<sub>2</sub>@PVDF composite exhibited excellent photothermal properties. Combining these properties with superior EWOD responses, the Ti<sub>3</sub>C<sub>2</sub>@PVDF composite was successfully applied to achieve highly efficient dehumidification in Ti<sub>3</sub>C<sub>2</sub>@PVDF-based EWOD devices.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"714 ","pages":"Article 136556"},"PeriodicalIF":4.9,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552006","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}

引用次数: 0

Mechanistic investigation into influence of adsorbed H and H2O on In-Rh alloy during CO2 hydrogenation to methanol

IF 4.9 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2025-03-03 DOI: 10.1016/j.colsurfa.2025.136550

Jie Yu , Ai-Ting Xiao , Lin-Yi Li , Kai Tan , Zu-Jin Lin

In our study, DFT calculations were employed to study the influence of both adsorbed H₂ and H₂O upon the catalysis reactivity of CO₂ hydrogenation to methanol over two exposed planes of In-Rh alloy. For InRh(011), CH₃OH formation is not viable from both “Formate” and “RWGS+CO-Hydro” mechanisms owing to the substantial kinetic barrier encountered. For In3Rh(212), the activated H* prefers to adsorb at surface Rh atoms from the first layer and thereby generates three potentially reactive sites (Rh_I, Rh_II and Rh_III), from which methanol is produced through the “Formate” pathway. Based on the microkinetic model, methanol is selectively produced from Rh_III while CO is the favorable product from the other two. Methanol formation from both Rh_I and Rh_II is substantially limited by the rate-determining step (RDS) owing to the bridging configuration of H* being too stable. As a major side product of CO₂ hydrogenation, H₂O introduction could lower the RDS of the “Formate” pathway from Rh_III and thereby substantially improve its production rate of methanol. Overall, our calculation determines the reactive site of In-Rh alloy and explains the way how H₂ and H₂O influence the reaction mechanism and catalysis performance of the bimetallic system.

{"title":"Mechanistic investigation into influence of adsorbed H and H2O on In-Rh alloy during CO2 hydrogenation to methanol","authors":"Jie Yu , Ai-Ting Xiao , Lin-Yi Li , Kai Tan , Zu-Jin Lin","doi":"10.1016/j.colsurfa.2025.136550","DOIUrl":"10.1016/j.colsurfa.2025.136550","url":null,"abstract":"<div><div>In our study, DFT calculations were employed to study the influence of both adsorbed H<sub>2</sub> and H<sub>2</sub>O upon the catalysis reactivity of CO<sub>2</sub> hydrogenation to methanol over two exposed planes of In-Rh alloy. For InRh(011), CH<sub>3</sub>OH formation is not viable from both “Formate” and “RWGS+CO-Hydro” mechanisms owing to the substantial kinetic barrier encountered. For In3Rh(212), the activated H* prefers to adsorb at surface Rh atoms from the first layer and thereby generates three potentially reactive sites (<em>Rh_I</em>, <em>Rh_II</em> and <em>Rh_III</em>), from which methanol is produced through the “Formate” pathway. Based on the microkinetic model, methanol is selectively produced from <em>Rh_III</em> while CO is the favorable product from the other two. Methanol formation from both <em>Rh_I</em> and <em>Rh_II</em> is substantially limited by the rate-determining step (RDS) owing to the bridging configuration of H* being too stable. As a major side product of CO<sub>2</sub> hydrogenation, H<sub>2</sub>O introduction could lower the RDS of the “Formate” pathway from <em>Rh_III</em> and thereby substantially improve its production rate of methanol. Overall, our calculation determines the reactive site of In-Rh alloy and explains the way how H<sub>2</sub> and H<sub>2</sub>O influence the reaction mechanism and catalysis performance of the bimetallic system.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"714 ","pages":"Article 136550"},"PeriodicalIF":4.9,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552008","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}

引用次数: 0

Enhanced HER and OER performance via CoS2-NiS2 heterostructures on N-doped carbon nanotube frameworks

IF 4.9 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2025-03-03 DOI: 10.1016/j.colsurfa.2025.136547

Wei Xia , Congling Li , Li Zhang , Xuemin Yu , Li Zheng , Rui Liu , Aifeng Lv

The development of highly efficient electrocatalysts is of utmost importance for advancing electrochemical energy conversion technologies. Transition metal sulfide heterostructure electrocatalysts have been widely studied and applied in electrocatalysis due to their highly inherent activity in the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) at the interface. We prepared NiS₂/CoS₂ nanoparticle heterostructures doped with nitrogen-carbon nanotubes (CoS₂/NiS₂@N-CNTs) to induce the formation of bifunctional reaction sites. This design contributes to the excellent catalytic activity for electrocatalytic water splitting. The CoS₂/NiS₂@N-CNTs electrocatalyst exhibits prominent catalytic activities toward HER and OER, which required low overpotentials of 126 and 205 mV to yield the current density of 10 mA cm⁻² in 1 M KOH. The prepared electrocatalysts exhibit fast reaction kinetics with tafel slopes of 71 and 82 mV dec⁻¹ in HER and OER, respectively. The catalyst has a larger electrochemically active surface area (ECSA) of 1030 cm⁻² and a strong electron transfer capability with an electrochemical impedance of 41 Ω. These properties are mainly attributed to the unique heterogeneous structure of the catalyst. In addition, CoS₂/NiS₂@N-CNTs catalyst is used as both the cathode and anode to fabricate a two-electrode system in a 1.0 M KOH solution measured at 1.53 V. Meanwhile, the stability measurement maintains for 23 h at a current density of 10 mA cm⁻² with negligible degradation. This work has successfully developed an approach for rational design and novel synthesis of metal sulfide hybrids as bifunctional electrocatalysts with high activity and stability for overall water splitting.

{"title":"Enhanced HER and OER performance via CoS2-NiS2 heterostructures on N-doped carbon nanotube frameworks","authors":"Wei Xia , Congling Li , Li Zhang , Xuemin Yu , Li Zheng , Rui Liu , Aifeng Lv","doi":"10.1016/j.colsurfa.2025.136547","DOIUrl":"10.1016/j.colsurfa.2025.136547","url":null,"abstract":"<div><div>The development of highly efficient electrocatalysts is of utmost importance for advancing electrochemical energy conversion technologies. Transition metal sulfide heterostructure electrocatalysts have been widely studied and applied in electrocatalysis due to their highly inherent activity in the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) at the interface. We prepared NiS<sub>2</sub>/CoS<sub>2</sub> nanoparticle heterostructures doped with nitrogen-carbon nanotubes (CoS<sub>2</sub>/NiS<sub>2</sub>@N-CNTs) to induce the formation of bifunctional reaction sites. This design contributes to the excellent catalytic activity for electrocatalytic water splitting. The CoS<sub>2</sub>/NiS<sub>2</sub>@N-CNTs electrocatalyst exhibits prominent catalytic activities toward HER and OER, which required low overpotentials of 126 and 205 mV to yield the current density of 10 mA cm<sup>−2</sup> in 1 M KOH. The prepared electrocatalysts exhibit fast reaction kinetics with tafel slopes of 71 and 82 mV dec<sup>−1</sup> in HER and OER, respectively. The catalyst has a larger electrochemically active surface area (ECSA) of 1030 cm<sup>−2</sup> and a strong electron transfer capability with an electrochemical impedance of 41 Ω. These properties are mainly attributed to the unique heterogeneous structure of the catalyst. In addition, CoS<sub>2</sub>/NiS<sub>2</sub>@N-CNTs catalyst is used as both the cathode and anode to fabricate a two-electrode system in a 1.0 M KOH solution measured at 1.53 V. Meanwhile, the stability measurement maintains for 23 h at a current density of 10 mA cm<sup>−2</sup> with negligible degradation. This work has successfully developed an approach for rational design and novel synthesis of metal sulfide hybrids as bifunctional electrocatalysts with high activity and stability for overall water splitting.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"713 ","pages":"Article 136547"},"PeriodicalIF":4.9,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143549880","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}

引用次数: 0

Exploring the effects of salinity and ionic composition on wettability alteration and interfacial properties in carbonate oil reservoirs

IF 4.9 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2025-03-03 DOI: 10.1016/j.colsurfa.2025.136554

Behrooz Ahmadi , Amir H. Molaei , Eghbal Sahraei , Amir H. Mohammadi

This study investigates the effects of salinity and ionic composition of brines on water-rock and water-oil interactions in carbonate reservoirs. The research evaluates equilibrium and dynamic interfacial tension (IFT) at the brine-oil interface, zeta potential, wettability alteration, and calcite dissolution mechanisms using a range of aqueous solutions with varying salinities and divalent ion concentrations. By increasing salinity, from deionized water to a salinity of 39,841 ppm, corresponding to seawater (SW) with a 25 % increase in divalent ions, the salting-in effect and the partitioning of polar oil components, equilibrium IFT decreases to approximately 11.65 mN/m. Dynamic IFT behavior was analyzed using a coupled diffusion and electrical double-layer (EDL) expansion model, showing that surface-active molecules migrate to the oil-water interface, driven by concentration gradients and ionic interactions. This resulted in IFT reduction over time. FT-IR and UV spectra of the interfacial oil and brines were used to study the potential formation of micro-dispersions. Wettability alteration experiments demonstrated that low-salinity brines, particularly 50 %i2v, effectively transformed carbonate and dolomite rocks from oil-wet to water-wet conditions, with contact angles of 47 ± 1° and 62 ± 2°, respectively, attributed to surface complexation. Scanning Electron Microscope (SEM) images and pH variations confirmed greater calcite dissolution with 50dSW, altering the rock's surface morphology. Zeta potential measurements highlighted the interplay between salinity, ionic strength, and divalent ions in modifying the surface charge of carbonate rocks.

{"title":"Exploring the effects of salinity and ionic composition on wettability alteration and interfacial properties in carbonate oil reservoirs","authors":"Behrooz Ahmadi , Amir H. Molaei , Eghbal Sahraei , Amir H. Mohammadi","doi":"10.1016/j.colsurfa.2025.136554","DOIUrl":"10.1016/j.colsurfa.2025.136554","url":null,"abstract":"<div><div>This study investigates the effects of salinity and ionic composition of brines on water-rock and water-oil interactions in carbonate reservoirs. The research evaluates equilibrium and dynamic interfacial tension (IFT) at the brine-oil interface, zeta potential, wettability alteration, and calcite dissolution mechanisms using a range of aqueous solutions with varying salinities and divalent ion concentrations. By increasing salinity, from deionized water to a salinity of 39,841 ppm, corresponding to seawater (SW) with a 25 % increase in divalent ions, the salting-in effect and the partitioning of polar oil components, equilibrium IFT decreases to approximately 11.65 mN/m. Dynamic IFT behavior was analyzed using a coupled diffusion and electrical double-layer (EDL) expansion model, showing that surface-active molecules migrate to the oil-water interface, driven by concentration gradients and ionic interactions. This resulted in IFT reduction over time. FT-IR and UV spectra of the interfacial oil and brines were used to study the potential formation of micro-dispersions. Wettability alteration experiments demonstrated that low-salinity brines, particularly 50 %i2v, effectively transformed carbonate and dolomite rocks from oil-wet to water-wet conditions, with contact angles of 47 ± 1° and 62 ± 2°, respectively, attributed to surface complexation. Scanning Electron Microscope (SEM) images and pH variations confirmed greater calcite dissolution with 50dSW, altering the rock's surface morphology. Zeta potential measurements highlighted the interplay between salinity, ionic strength, and divalent ions in modifying the surface charge of carbonate rocks.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"713 ","pages":"Article 136554"},"PeriodicalIF":4.9,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143549866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0