Pub Date : 2026-02-02DOI: 10.1016/j.matchemphys.2026.132156
Qiang Peng , Chunhua Gong , Qianhua Zhang , Chunhua Yue , Yongguang Bi , Huaicheng Qin , Fansheng Kong
Hollow dendritic mesoporous bioactive glass (HDMBG) was synthesized using a microemulsion-assisted sol–gel method, with structural parameters optimized by adjusting the oil-to-water ratio, ethanol-to-water ratio, and sodium carbonate etching time. The resulting particles exhibited a uniform quasi-spherical morphology, high specific surface area (127.48 m2/g), large pore volume (1.03 cm3/g), and mesopores averaging 14.7 nm. Comprehensive characterization confirmed a hollow dendritic structure with an amorphous silicate framework and stable elemental composition. Biocompatibility was demonstrated through hemocompatibility testing and cell viability assays using human bone marrow-derived mesenchymal stem cells. When loaded with doxorubicin hydrochloride at a 1:1 mass ratio, the material achieved high drug loading capacity (464.7 mg/g) and encapsulation efficiency (86.83 %). In vitro release studies demonstrated sustained and pH-responsive drug release, with greater release observed under acidic tumor-like conditions. Compared to free doxorubicin hydrochloride, the drug-loaded particles exhibited enhanced cytotoxicity against cancer cells, particularly at medium to high concentrations, attributed to prolonged release and pH-triggered targeting. These results highlight the potential of HDMBG as a safe and effective nanocarrier for targeted cancer therapy and other biomedical applications.
{"title":"Controllable pH-responsive hollow dendritic mesoporous bioactive glass nanocarriers for sustained doxorubicin release","authors":"Qiang Peng , Chunhua Gong , Qianhua Zhang , Chunhua Yue , Yongguang Bi , Huaicheng Qin , Fansheng Kong","doi":"10.1016/j.matchemphys.2026.132156","DOIUrl":"10.1016/j.matchemphys.2026.132156","url":null,"abstract":"<div><div>Hollow dendritic mesoporous bioactive glass (HDMBG) was synthesized using a microemulsion-assisted sol–gel method, with structural parameters optimized by adjusting the oil-to-water ratio, ethanol-to-water ratio, and sodium carbonate etching time. The resulting particles exhibited a uniform quasi-spherical morphology, high specific surface area (127.48 m<sup>2</sup>/g), large pore volume (1.03 cm<sup>3</sup>/g), and mesopores averaging 14.7 nm. Comprehensive characterization confirmed a hollow dendritic structure with an amorphous silicate framework and stable elemental composition. Biocompatibility was demonstrated through hemocompatibility testing and cell viability assays using human bone marrow-derived mesenchymal stem cells. When loaded with doxorubicin hydrochloride at a 1:1 mass ratio, the material achieved high drug loading capacity (464.7 mg/g) and encapsulation efficiency (86.83 %). <em>In vitro</em> release studies demonstrated sustained and pH-responsive drug release, with greater release observed under acidic tumor-like conditions. Compared to free doxorubicin hydrochloride, the drug-loaded particles exhibited enhanced cytotoxicity against cancer cells, particularly at medium to high concentrations, attributed to prolonged release and pH-triggered targeting. These results highlight the potential of HDMBG as a safe and effective nanocarrier for targeted cancer therapy and other biomedical applications.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"353 ","pages":"Article 132156"},"PeriodicalIF":4.7,"publicationDate":"2026-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146170870","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-02-02DOI: 10.1016/j.matchemphys.2026.132127
Parisa Momeni Dehaghi , Tahereh Nasiriani , Mohammad Taghi Nazeri, Ahmad Shaabani
The functionalization of materials through multicomponent reactions (MCRs) has sparked significant interest among researchers due to the development of materials with exceptional properties. Herein, a novel bio-based catalytic system was synthesized via the conjugation of cobalt (II) tetra-aminophthalocyanine (Co-TAPc) and folic acid (FA) (UFA@Co-TAPc) through the Ugi four-component reaction (Ugi-4CR). For this aim, the amine functional groups of the Co-TAPc, benzaldehyde, FA, and cyclohexyl isocyanide participated in the Ugi-4CR to prepare UFA@Co-TAPc as a biocatalyst. The catalytic activity of the synthesized biocatalyst was explored in generating cyclic carbonate derivatives via the chemical fixation of carbon dioxide (CO2) with epoxides in the presence of tetrabutylammonium bromide (TBAB) as a co-catalyst. The structures of tetra-aminophthalocyanine (TAPc) and FA are rich in nitrogen, and the amide bonds formed via the Ugi reaction have a synergistic effect in CO2 absorption. Fascinatingly, catalytic experiments demonstrated that the synthesized biocatalyst was highly efficient regarding the chemical fixation of CO2 (yield 90–98 %), completing it under mild reaction conditions (solvent free, PCO2 = 1 bar, 2 h, 80 °C). The advantages of this biocatalytic system include its low cost, short reaction time, and environmental friendliness. Moreover, UFA@Co-TAPc, as heterogeneous biocatalyst, is easy to recycle and reuse, show low metal leaching, and reuse over five runs with only a slight reduction in catalytic activity.
{"title":"Cobalt(II) tetra-aminophthalocyanine conjugated folic acid by the Ugi reaction: An efficient heterogeneous biocatalyst for cycloaddition of carbon dioxide to epoxide","authors":"Parisa Momeni Dehaghi , Tahereh Nasiriani , Mohammad Taghi Nazeri, Ahmad Shaabani","doi":"10.1016/j.matchemphys.2026.132127","DOIUrl":"10.1016/j.matchemphys.2026.132127","url":null,"abstract":"<div><div>The functionalization of materials through multicomponent reactions (MCRs) has sparked significant interest among researchers due to the development of materials with exceptional properties. Herein, a novel <em>bio</em>-based catalytic system was synthesized <em>via</em> the conjugation of cobalt (II) <em>tetra-</em>aminophthalocyanine (Co-TAPc) and folic acid (FA) (UFA@Co-TAPc) through the Ugi four-component reaction (Ugi-4CR). For this aim, the amine functional groups of the Co-TAPc, benzaldehyde, FA, and cyclohexyl isocyanide participated in the Ugi-4CR to prepare UFA@Co-TAPc as a biocatalyst. The catalytic activity of the synthesized biocatalyst was explored in generating cyclic carbonate derivatives <em>via</em> the chemical fixation of carbon dioxide (CO<sub>2</sub>) with epoxides in the presence of tetrabutylammonium bromide (TBAB) as a co-catalyst. The structures of tetra-aminophthalocyanine (TAPc) and FA are rich in nitrogen, and the amide bonds formed <em>via</em> the Ugi reaction have a synergistic effect in CO<sub>2</sub> absorption. Fascinatingly, catalytic experiments demonstrated that the synthesized biocatalyst was highly efficient regarding the chemical fixation of CO<sub>2</sub> (yield 90–98 %), completing it under mild reaction conditions (solvent free, P<sub>CO2</sub> = 1 bar, 2 h, 80 °C). The advantages of this biocatalytic system include its low cost, short reaction time, and environmental friendliness. Moreover, UFA@Co-TAPc, as heterogeneous biocatalyst, is easy to recycle and reuse, show low metal leaching, and reuse over five runs with only a slight reduction in catalytic activity.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"354 ","pages":"Article 132127"},"PeriodicalIF":4.7,"publicationDate":"2026-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146190774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-02-01DOI: 10.1016/j.matchemphys.2026.132169
Yanrui Wang , Shubo Xu , Tianhua Li , Ying Zhao , Chen Xu , Weihai Zhang , Wenming Wang , Lindong Wang
The modification of materials via the Ultrasonic Surface Rolling Process (USRP) serves as a pivotal approach for enhancing surface integrity, wear resistance, and electrochemical corrosion performance. Investigations into the impact of USRP on surface integrity encompass analyses from the perspectives of surface roughness, microhardness, and surface residual stress, elucidating the underlying mechanisms through which key process parameters—such as rolling passes, vibration amplitude, and rolling force—affect the material's surface state. Furthermore, the influence of optimized process parameters on surface morphology and microstructure, along with the corresponding performance outcomes, has been systematically characterized.The results indicated that the USRP-treated specimen exhibited a reduction in surface roughness by approximately 80% and an increase in surface microhardness to over 300 HV0.5, accompanied by the formation of a more pronounced residual compressive stress layer on the surface. Microstructural analysis revealed that USRP led to significant grain refinement in the near-surface region, with the average grain size decreasing from 42 μm to 22 μm. This refinement was accompanied by a high density of dislocations and the formation of lath martensite. The synergistic effects of grain refinement, work hardening, and residual compressive stress contributed to a reduction in wear rate by approximately 90%, as well as a significant decrease in corrosion current density, indicating a notable improvement in electrochemical corrosion performance. Further investigations demonstrated that achieving optimal surface integrity and mechanical performance requires appropriate process parameters, as excessive rolling could induce surface damage and performance degradation.
{"title":"Multi-parameter ultrasonic surface rolling for synergistic enhancement of wear and electrochemical corrosion performance in 20CrMoH steel","authors":"Yanrui Wang , Shubo Xu , Tianhua Li , Ying Zhao , Chen Xu , Weihai Zhang , Wenming Wang , Lindong Wang","doi":"10.1016/j.matchemphys.2026.132169","DOIUrl":"10.1016/j.matchemphys.2026.132169","url":null,"abstract":"<div><div>The modification of materials via the Ultrasonic Surface Rolling Process (USRP) serves as a pivotal approach for enhancing surface integrity, wear resistance, and electrochemical corrosion performance. Investigations into the impact of USRP on surface integrity encompass analyses from the perspectives of surface roughness, microhardness, and surface residual stress, elucidating the underlying mechanisms through which key process parameters—such as rolling passes, vibration amplitude, and rolling force—affect the material's surface state. Furthermore, the influence of optimized process parameters on surface morphology and microstructure, along with the corresponding performance outcomes, has been systematically characterized.The results indicated that the USRP-treated specimen exhibited a reduction in surface roughness by approximately 80% and an increase in surface microhardness to over 300 HV<sub>0.5</sub>, accompanied by the formation of a more pronounced residual compressive stress layer on the surface. Microstructural analysis revealed that USRP led to significant grain refinement in the near-surface region, with the average grain size decreasing from 42 μm to 22 μm. This refinement was accompanied by a high density of dislocations and the formation of lath martensite. The synergistic effects of grain refinement, work hardening, and residual compressive stress contributed to a reduction in wear rate by approximately 90%, as well as a significant decrease in corrosion current density, indicating a notable improvement in electrochemical corrosion performance. Further investigations demonstrated that achieving optimal surface integrity and mechanical performance requires appropriate process parameters, as excessive rolling could induce surface damage and performance degradation.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"354 ","pages":"Article 132169"},"PeriodicalIF":4.7,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146190783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study investigates the corrosion behavior and mechanism of AA5083 exposed to the seawater-air interface of the China's Bohai Sea for 2.5 years, using macroscopic observation, microstructural characterization, and electrochemical analysis. Results show that corrosion severity follows the order: waterline zone > splash zone > full immersion zone, with the full immersion zone exhibiting the best corrosion resistance due to a thick, dense, high-resistivity surface film (possibly enhanced by biomineralization). In contrast, the splash zone and waterline zone form thin, defective, and loose films, leading to poor protection. The oxide film's resistivity distribution closely correlates with corrosion resistance: high initial resistivity in the full immersion zone forms an effective barrier, while low, uneven resistivity in the other two zones reflects film defects, consistent with macroscopic electrochemical indicators. This work provides insights into corrosion protection of AA5083 in marine engineering.
{"title":"Corrosion degradation of AA5083 long-scale specimen exposed to the seawater-air interface of the Bohai Sea for 2.5 years","authors":"Yuheng Wu , Futai Zhang , Mingyu Wang , Wanbin Chen , Yunze Xu , Zhenbo Qin , Da-Hai Xia","doi":"10.1016/j.matchemphys.2026.132167","DOIUrl":"10.1016/j.matchemphys.2026.132167","url":null,"abstract":"<div><div>This study investigates the corrosion behavior and mechanism of AA5083 exposed to the seawater-air interface of the China's Bohai Sea for 2.5 years, using macroscopic observation, microstructural characterization, and electrochemical analysis. Results show that corrosion severity follows the order: waterline zone > splash zone > full immersion zone, with the full immersion zone exhibiting the best corrosion resistance due to a thick, dense, high-resistivity surface film (possibly enhanced by biomineralization). In contrast, the splash zone and waterline zone form thin, defective, and loose films, leading to poor protection. The oxide film's resistivity distribution closely correlates with corrosion resistance: high initial resistivity in the full immersion zone forms an effective barrier, while low, uneven resistivity in the other two zones reflects film defects, consistent with macroscopic electrochemical indicators. This work provides insights into corrosion protection of AA5083 in marine engineering.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"354 ","pages":"Article 132167"},"PeriodicalIF":4.7,"publicationDate":"2026-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146191530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-31DOI: 10.1016/j.matchemphys.2026.132162
Hamna Arooj , Tauseef Munawar , Ambreen Bashir , Mostafa A. Ismail , Abdul Waheed Rabbani , Muhammad Rafaqat , Faisal Mukhtar , Muhammad Sufyan Naeem , Faisal Iqbal , Suleyman I. Allakhverdiev
The production of green hydrogen by electrocatalytic water splitting is important for decreasing the extensive utilization of carbonized petroleum. However, the sluggish kinetics of OER and HER processes demand suitable catalysts that have high efficiency/performance and low cost. Herein, we synthesized the MnSeO3 electrocatalyst using the hydrothermal method, but non-surface chemistry, limited active centres, and poor electrical conductivity made it an inefficient electrocatalyst for hydrogen production. These drawbacks are reduced by adopting a composite strategy with non-metal sulfide (MnSeO3/S composite) and analysing its electrochemical trend towards OER and HER. Experimental investigation, including XRD, FESEM, IV, and XPS, focused on mixed-phase growth, good conductivity, regulated morphology, and electronic structure. Developing high valence active centres and defective structure in MnSeO3/S composite increased the adsorption and desorption of atoms on the catalyst surface compared to bulk catalysts. By coating the composite onto the stainless-steel (SS) substrate, the formed MnSeO3/S/SS electrocatalyst obtained a small overpotential of 248 mV for OER and 128 mV for HER at 10 mA cm−2 current density. Moreover, the functionalization of bimetallic oxide with sulfide anions provided a fast electron and ion transfer rate, which is confirmed by low Tafel slope values (48.1 mV dec−1 for OER and 72 mV dec−1 for HER). The interaction across cation-anion bonds induced an active large surface area and the lowest polarization resistivity, confirmed by ECSA and EIS. Moreover, the enormous stability of MnSeO3/S electrocatalyst in alkaline medium proved beneficial for developing other binary material/anion electrocatalysts towards future electrochemical applications.
{"title":"Controlled synthesis of sulfurization-assisted MnSeO3/S electrocatalyst for OER and HER in an alkaline medium","authors":"Hamna Arooj , Tauseef Munawar , Ambreen Bashir , Mostafa A. Ismail , Abdul Waheed Rabbani , Muhammad Rafaqat , Faisal Mukhtar , Muhammad Sufyan Naeem , Faisal Iqbal , Suleyman I. Allakhverdiev","doi":"10.1016/j.matchemphys.2026.132162","DOIUrl":"10.1016/j.matchemphys.2026.132162","url":null,"abstract":"<div><div>The production of green hydrogen by electrocatalytic water splitting is important for decreasing the extensive utilization of carbonized petroleum. However, the sluggish kinetics of OER and HER processes demand suitable catalysts that have high efficiency/performance and low cost. Herein, we synthesized the MnSeO<sub>3</sub> electrocatalyst using the hydrothermal method, but non-surface chemistry, limited active centres, and poor electrical conductivity made it an inefficient electrocatalyst for hydrogen production. These drawbacks are reduced by adopting a composite strategy with non-metal sulfide (MnSeO<sub>3</sub>/S composite) and analysing its electrochemical trend towards OER and HER. Experimental investigation, including XRD, FESEM, IV, and XPS, focused on mixed-phase growth, good conductivity, regulated morphology, and electronic structure. Developing high valence active centres and defective structure in MnSeO<sub>3</sub>/S composite increased the adsorption and desorption of atoms on the catalyst surface compared to bulk catalysts. By coating the composite onto the stainless-steel (SS) substrate, the formed MnSeO<sub>3</sub>/S/SS electrocatalyst obtained a small overpotential of 248 mV for OER and 128 mV for HER at 10 mA cm<sup>−2</sup> current density. Moreover, the functionalization of bimetallic oxide with sulfide anions provided a fast electron and ion transfer rate, which is confirmed by low Tafel slope values (48.1 mV dec<sup>−1</sup> for OER and 72 mV dec<sup>−1</sup> for HER). The interaction across cation-anion bonds induced an active large surface area and the lowest polarization resistivity, confirmed by ECSA and EIS. Moreover, the enormous stability of MnSeO<sub>3</sub>/S electrocatalyst in alkaline medium proved beneficial for developing other binary material/anion electrocatalysts towards future electrochemical applications.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"354 ","pages":"Article 132162"},"PeriodicalIF":4.7,"publicationDate":"2026-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146191920","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-31DOI: 10.1016/j.matchemphys.2026.132143
Roman Pushkarev , Z. Silvester Houweling , Robbert W.E. van de Kruijs , Wesley T.E. Van den Beld , Jacobus M. Sturm , Marcelo D. Ackermann , Fred Bijkerk
We report a systematic experimental study of the resistance of thin film metal oxides (MOx) to chemical reduction by atomic hydrogen (H*) at 700 °C. Thin films of Y2O3, HfO2, ZrO2, TiO2, Nb2O5 and Al2O3 are selected based on their relevance to various coating applications in, for instance, integrated circuits and extreme ultraviolet lithography (EUVL) scanners. In the study 15–20 nm thick MOx thin films were thermally annealed at 900 °C and thus stabilized before exposure to H* at 700 °C. Comprehensive characterization using X-ray photoelectron spectroscopy, X-ray reflectivity, X-ray diffraction, atomic force microscopy, and in-situ ellipsometry revealed two distinct categories of behavior, which are combined with equilibrium thermodynamics assessments. Upon exposure to H*, Y2O3, HfO2, ZrO2, and Al2O3 exhibited high resistance to reduction, with minor to no morphological, structural or compositional changes, consistent with thermodynamic predictions. In contrast, TiO2 and Nb2O5 underwent phase transformation and reduction to lower oxidation states. At present systematic reports in the literature of MOx interaction and their reducibility by H* are scarce. We here provide insight into general trends of MOx stability that is relevant for the need of chemically stable coatings in reactive environments like H*, but also low-ion energy H plasmas that reside in EUVL scanners.
{"title":"Chemical etch resistance of sputter-deposited metal oxide thin film coatings in atomic hydrogen at 700 °C","authors":"Roman Pushkarev , Z. Silvester Houweling , Robbert W.E. van de Kruijs , Wesley T.E. Van den Beld , Jacobus M. Sturm , Marcelo D. Ackermann , Fred Bijkerk","doi":"10.1016/j.matchemphys.2026.132143","DOIUrl":"10.1016/j.matchemphys.2026.132143","url":null,"abstract":"<div><div>We report a systematic experimental study of the resistance of thin film metal oxides (MO<sub>x</sub>) to chemical reduction by atomic hydrogen (H*) at 700 °C. Thin films of Y<sub>2</sub>O<sub>3</sub>, HfO<sub>2</sub>, ZrO<sub>2</sub>, TiO<sub>2</sub>, Nb<sub>2</sub>O<sub>5</sub> and Al<sub>2</sub>O<sub>3</sub> are selected based on their relevance to various coating applications in, for instance, integrated circuits and extreme ultraviolet lithography (EUVL) scanners. In the study 15–20 nm thick MO<sub>x</sub> thin films were thermally annealed at 900 °C and thus stabilized before exposure to H* at 700 °C. Comprehensive characterization using X-ray photoelectron spectroscopy, X-ray reflectivity, X-ray diffraction, atomic force microscopy, and <em>in-situ</em> ellipsometry revealed two distinct categories of behavior, which are combined with equilibrium thermodynamics assessments. Upon exposure to H*, Y<sub>2</sub>O<sub>3</sub>, HfO<sub>2</sub>, ZrO<sub>2</sub>, and Al<sub>2</sub>O<sub>3</sub> exhibited high resistance to reduction, with minor to no morphological, structural or compositional changes, consistent with thermodynamic predictions. In contrast, TiO<sub>2</sub> and Nb<sub>2</sub>O<sub>5</sub> underwent phase transformation and reduction to lower oxidation states. At present systematic reports in the literature of MO<sub>x</sub> interaction and their reducibility by H* are scarce. We here provide insight into general trends of MO<sub>x</sub> stability that is relevant for the need of chemically stable coatings in reactive environments like H*, but also low-ion energy H plasmas that reside in EUVL scanners.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"354 ","pages":"Article 132143"},"PeriodicalIF":4.7,"publicationDate":"2026-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146190775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-31DOI: 10.1016/j.matchemphys.2026.132158
Alfiya M. Nadeghar , Avinash C. Molane , Shailesh G. Pawar , Ramesh N. Mulik , Manickam Selvaraj , Arun Karnwal , Prakash A. Mahanwar , Vikas B. Patil
Layered double hydroxides (LDHs), known for their unique anion-exchange capability and adjustable interlayer spacing, have emerged as splendid electroactive materials for supercapacitors featuring an extensive surface area and impressive theoretical capacitance. Hence, mesoporous ZnFe-layered double hydroxide thin film electrodes were prepared by the one-step electrochemical method. The prepared ZnFe-LDH thin films were characterized by X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), Field emission scanning electron microscopy (FESEM), High-resolution transmission electron microscopy (HRTEM), and Contact angle measurement. Here, with the increase in the concentration of Zn2+, the electrochemical performance and morphology of ZnFe-LDH electrodes have changed. The electrochemical performance of ZnFe-LDH electrodes was tested in different electrolytes as KOH, NaOH, and KCl, by varying concentrations at the potential window of 1.2 V by cyclic voltammetry (CV), galvanostatic charging/discharging (GCD), and electrochemical impedance spectroscopy (EIS). The ZnFe-LDH3 electrode delivered the maximum specific capacitance of 950.23 F/g at 5 mV/s, specific energy 77.45 Wh/kg, specific power 5.41 kW/kg and 99.30 % of coulombic efficiency with 84.94 % capacitance retention rate over 10000 cycles at 100 mV/s scan rate. This can be attributed to the hierarchical structure, improved hydrophilicity, fast reversible redox reactions, and the material's high surface area of 35.73 m2/g. Furthermore, the assembled ZnFe-LDH3 symmetric device achieved the maximum specific energy of 19.52 Wh/kg and specific power of 2.18 kW/kg with an 80.2 % retention rate over 10000 cycles. These findings highlight the potential of ZnFe-LDH3 is a promising electrode material for supercapacitor applications.
{"title":"Mesoporous ZnFe-layered double hydroxide electrodes via an electrochemical approach for high-performance supercapacitors","authors":"Alfiya M. Nadeghar , Avinash C. Molane , Shailesh G. Pawar , Ramesh N. Mulik , Manickam Selvaraj , Arun Karnwal , Prakash A. Mahanwar , Vikas B. Patil","doi":"10.1016/j.matchemphys.2026.132158","DOIUrl":"10.1016/j.matchemphys.2026.132158","url":null,"abstract":"<div><div>Layered double hydroxides (LDHs), known for their unique anion-exchange capability and adjustable interlayer spacing, have emerged as splendid electroactive materials for supercapacitors featuring an extensive surface area and impressive theoretical capacitance. Hence, mesoporous ZnFe-layered double hydroxide thin film electrodes were prepared by the one-step electrochemical method. The prepared ZnFe-LDH thin films were characterized by X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), Field emission scanning electron microscopy (FESEM), High-resolution transmission electron microscopy (HRTEM), and Contact angle measurement. Here, with the increase in the concentration of Zn<sup>2+</sup>, the electrochemical performance and morphology of ZnFe-LDH electrodes have changed. The electrochemical performance of ZnFe-LDH electrodes was tested in different electrolytes as KOH, NaOH, and KCl, by varying concentrations at the potential window of 1.2 V by cyclic voltammetry (CV), galvanostatic charging/discharging (GCD), and electrochemical impedance spectroscopy (EIS). The ZnFe-LDH3 electrode delivered the maximum specific capacitance of 950.23 F/g at 5 mV/s, specific energy 77.45 Wh/kg, specific power 5.41 kW/kg and 99.30 % of coulombic efficiency with 84.94 % capacitance retention rate over 10000 cycles at 100 mV/s scan rate. This can be attributed to the hierarchical structure, improved hydrophilicity, fast reversible redox reactions, and the material's high surface area of 35.73 m<sup>2</sup>/g. Furthermore, the assembled ZnFe-LDH3 symmetric device achieved the maximum specific energy of 19.52 Wh/kg and specific power of 2.18 kW/kg with an 80.2 % retention rate over 10000 cycles. These findings highlight the potential of ZnFe-LDH3 is a promising electrode material for supercapacitor applications.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"354 ","pages":"Article 132158"},"PeriodicalIF":4.7,"publicationDate":"2026-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146098820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-31DOI: 10.1016/j.matchemphys.2026.132168
Tao Wang, Peng Lv, Shuang Liu, Baisen Song, Zizhou Li, Shibin Han
By regulating the structure and electromagnetic response of hexagonal boron nitride (h-BN) through biomass-derived carbon doping, a boron carbon nitride (BCN) ceramic absorber with improved impedance matching and synergistic loss behavior was developed. Corn-root-derived carbon was employed as the carbon source to synthesize a series of BCN materials with a carbon-content gradient via high-temperature pyrolysis. The correlations among microstructural evolution, electromagnetic parameters, impedance matching, and microwave absorption performance were systematically investigated. The results demonstrate that carbon incorporation effectively tunes the dielectric response by moderating the electrical conductivity and introducing structural heterogeneity (including defect/disorder features, asymmetric bonding environments, and abundant interfaces), thereby improving impedance matching and enhancing electromagnetic attenuation. The microwave loss of the BCN absorbers is mainly associated with polarization-related dielectric dissipation (including dipolar and interface-related relaxations) together with conductivity-associated loss, while a supplementary magnetic loss contribution is also observed from the magnetic response of the BCN system. Among all samples, BCN-3 achieves the most balanced attenuation-matching synergy, delivering a minimum reflection loss (RLmin) of −57.95 dB at a matching thickness of 1.66 mm and an effective absorption bandwidth (EAB) of 3.28 GHz. In contrast, excessive carbon addition leads to impedance mismatch and reduced effective absorption. This work highlights that rational control of biomass-carbon doping is crucial for optimizing the impedance-attenuation balance and provides guidance for designing lightweight BN-based microwave absorbers.
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Pub Date : 2026-01-31DOI: 10.1016/j.matchemphys.2026.132163
Pedda Masthanaiah Ette , Sajjad Mohsenpour , Xavier Michaud , Allen Sandwell , Seonghwan Kim , Simon Park , Chaneel Park
Despite notable progress in understanding interfacial mechanisms and the alloying–dealloying behavior of nanostructured silicon anodes, significant challenges remain in meeting the performance standards necessary for commercialization. Specifically, these include charge-induced large volume changes, redundant side reactions with the electrolyte, and poor initial coulombic efficiency. Herein, we report a method of pre-lithiation of silicon microspheres followed by conformal carbon coating (PL-Si/C). The resulting products exhibited an enhanced ICE of 84.2% and a stable reversible capacity of ∼1600 mA h/g at a 0.5C rate, with 83% retention, compared to spray-dried silicon microspheres (Si-MS), which showed 77.6% ICE and 81% retention. When integrated with graphite, PL-Si/C shows 90% ICE and 79.5% retention after 200 cycles at 1C rate, while Si-MS shows 62.5% capacity retention. The cycling stability of materials can be credited to the unique microsphere morphology in which Si nanodomains are embedded in carbon nanotube interwoven amorphous lithium silicate (LixSiOy) matrix, followed by conformal carbon coating using the chemical vapor deposition technique. The primary layer acts as a buffering medium during volume expansion, suppresses initial lithium loss, and enhances ICE. Further carbon coating supports the mechanical integrity. Further to realize the practical applicability of the material, full cells were tested with lithium and LiNCA cathodes.
尽管在理解纳米结构硅阳极的界面机制和合金化-脱合金行为方面取得了显著进展，但在满足商业化所需的性能标准方面仍存在重大挑战。具体来说，这些包括电荷引起的大体积变化，与电解质的多余副反应，以及较差的初始库仑效率。本文报道了一种硅微球预锂化后保形碳涂层（PL-Si/C）的方法。与喷雾干燥的硅微球（Si-MS）相比，所得产品的ICE增强了84.2%，在0.5C的速率下具有稳定的可逆容量为~ 1600 mA h/g，保留率为83%，而喷雾干燥的硅微球（Si-MS）的ICE为77.6%，保留率为81%。当与石墨结合时，在1C倍率下循环200次后，PL-Si/C的容量保留率为90%，保留率为79.5%，而Si-MS的容量保留率为62.5%。材料的循环稳定性可以归功于独特的微球形态，其中Si纳米畴嵌入碳纳米管交织的无定形硅酸锂（LixSiOy）基体中，然后使用化学气相沉积技术进行保形碳涂层。初级层在体积膨胀过程中起到缓冲介质的作用，抑制初始锂的损失，并增强ICE。进一步的碳涂层支持机械完整性。为了进一步实现材料的实际适用性，用锂和LiNCA阴极对满电池进行了测试。
{"title":"Synergistic engineering of prelithiation and carbon coating for silicon microsphere anodes in advanced Li-ion batteries","authors":"Pedda Masthanaiah Ette , Sajjad Mohsenpour , Xavier Michaud , Allen Sandwell , Seonghwan Kim , Simon Park , Chaneel Park","doi":"10.1016/j.matchemphys.2026.132163","DOIUrl":"10.1016/j.matchemphys.2026.132163","url":null,"abstract":"<div><div>Despite notable progress in understanding interfacial mechanisms and the alloying–dealloying behavior of nanostructured silicon anodes, significant challenges remain in meeting the performance standards necessary for commercialization. Specifically, these include charge-induced large volume changes, redundant side reactions with the electrolyte, and poor initial coulombic efficiency. Herein, we report a method of pre-lithiation of silicon microspheres followed by conformal carbon coating (PL-Si/C). The resulting products exhibited an enhanced ICE of 84.2% and a stable reversible capacity of ∼1600 mA h/g at a 0.5C rate, with 83% retention, compared to spray-dried silicon microspheres (Si-MS), which showed 77.6% ICE and 81% retention. When integrated with graphite, PL-Si/C shows 90% ICE and 79.5% retention after 200 cycles at 1C rate, while Si-MS shows 62.5% capacity retention. The cycling stability of materials can be credited to the unique microsphere morphology in which Si nanodomains are embedded in carbon nanotube interwoven amorphous lithium silicate (Li<sub>x</sub>SiO<sub>y</sub>) matrix, followed by conformal carbon coating using the chemical vapor deposition technique. The primary layer acts as a buffering medium during volume expansion, suppresses initial lithium loss, and enhances ICE. Further carbon coating supports the mechanical integrity. Further to realize the practical applicability of the material, full cells were tested with lithium and LiNCA cathodes.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"354 ","pages":"Article 132163"},"PeriodicalIF":4.7,"publicationDate":"2026-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146192207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Plasma electrolytic oxidation (PEO) is a promising technique for depositing bioactive coatings on titanium implants, but incorporating silver for antibacterial functionality while maintaining osteointegrative properties remains a critical challenge. This study systematically investigates the mechanisms limiting silver incorporation in PEO coatings on additively manufactured Ti–6Al–4V substrates and proposes practical solutions.
Coatings were formed in a phosphate-silicate electrolyte with AgNO3 additions (0–5 g/L) using bipolar pulsing (cathodic: −80 V, 50 μs; anodic: +350 V, 100 μs) at 500 Hz. Multi-technique characterization (SEM/EDS, Raman, TEM, XRD, XPS, and electrochemical testing) revealed that AgNO3 concentrations exceeding 2 g/L trigger “cauliflower” defects through cathodic galvanic reduction of Ag+, forming conductive dendrites that localize arc discharges, deplete Ca/P content, and promote spallation. In contrast, anodic-only pulsing minimizes silver incorporation but preserves coating integrity. Notably, the PEO-3Ag coating demonstrated potent broad-spectrum antibacterial activity against multidrug-resistant pathogens without compromising cell viability (97 % osteosarcoma cell survival). Ion release analysis and electrolyte chemistry revealed that silver phosphate precipitation competes with coating incorporation, further explaining why higher AgNO3 concentrations do not linearly increase silver in the coating.
These findings demonstrate a self-reinforcing defect mechanism and identify silver phosphate precipitation as an additional competing reaction, that allows to choose electrolyte composition yelding in coatings with high silver loading (∼1 at.%) while maintaining the bioactive composition and cytocompatibility essential for successful implantation.
{"title":"Mechanisms limiting silver incorporation in bioactive PEO-Ag coatings on Ti6Al4V","authors":"K.A. Kuptsov , A.N. Sheveyko , A.A. Pavlova , S.E. Semenova , T.O. Teplyakova , P.A. Loginov , B. Subramanian , D.V. Shtansky","doi":"10.1016/j.matchemphys.2026.132165","DOIUrl":"10.1016/j.matchemphys.2026.132165","url":null,"abstract":"<div><div>Plasma electrolytic oxidation (PEO) is a promising technique for depositing bioactive coatings on titanium implants, but incorporating silver for antibacterial functionality while maintaining osteointegrative properties remains a critical challenge. This study systematically investigates the mechanisms limiting silver incorporation in PEO coatings on additively manufactured Ti–6Al–4V substrates and proposes practical solutions.</div><div>Coatings were formed in a phosphate-silicate electrolyte with AgNO<sub>3</sub> additions (0–5 g/L) using bipolar pulsing (cathodic: −80 V, 50 μs; anodic: +350 V, 100 μs) at 500 Hz. Multi-technique characterization (SEM/EDS, Raman, TEM, XRD, XPS, and electrochemical testing) revealed that AgNO<sub>3</sub> concentrations exceeding 2 g/L trigger “cauliflower” defects through cathodic galvanic reduction of Ag<sup>+</sup>, forming conductive dendrites that localize arc discharges, deplete Ca/P content, and promote spallation. In contrast, anodic-only pulsing minimizes silver incorporation but preserves coating integrity. Notably, the PEO-3Ag coating demonstrated potent broad-spectrum antibacterial activity against multidrug-resistant pathogens without compromising cell viability (97 % osteosarcoma cell survival). Ion release analysis and electrolyte chemistry revealed that silver phosphate precipitation competes with coating incorporation, further explaining why higher AgNO<sub>3</sub> concentrations do not linearly increase silver in the coating.</div><div>These findings demonstrate a self-reinforcing defect mechanism and identify silver phosphate precipitation as an additional competing reaction, that allows to choose electrolyte composition yelding in coatings with high silver loading (∼1 at.%) while maintaining the bioactive composition and cytocompatibility essential for successful implantation.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"354 ","pages":"Article 132165"},"PeriodicalIF":4.7,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146190777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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