Pub Date : 2025-02-01DOI: 10.1016/j.surfin.2025.105861
Haoran Wang, Yuying Wu, Junqing Han, Can Li, Yanyan Jiang, Xiangfa Liu
This study successfully synthesized a honeycomb-structured Cu-B alloy through solidification conditions. The microstructure of the honeycomb-like Cu-B alloy revealed the coexistence of crystalline and amorphous phases, exhibiting a characteristic honeycomb structure. In testing conducted in 0.6 mol/L HCl and 0.6 mol/L NaCl solutions, the honeycomb Cu-B alloy has excellent corrosion resistance compared with Cu-30Ni alloy. The hardness of the alloy reached 3.8 GPa, surpassing other Cu-based alloys and alloys with good corrosion resistance. Additionally, the honeycomb-like Cu-B alloy showed excellent antimicrobial activity against Pseudomonas aeruginosa. Consequently, the honeycomb-structured honeycomb-like Cu-B alloy is deemed suitable for the demanding corrosive environments encountered in offshore engineering applications.
{"title":"A honeycomb-like crystalline-amorphous nanostructure in Cu-B alloy with high corrosion resistance","authors":"Haoran Wang, Yuying Wu, Junqing Han, Can Li, Yanyan Jiang, Xiangfa Liu","doi":"10.1016/j.surfin.2025.105861","DOIUrl":"10.1016/j.surfin.2025.105861","url":null,"abstract":"<div><div>This study successfully synthesized a honeycomb-structured Cu-B alloy through solidification conditions. The microstructure of the honeycomb-like Cu-B alloy revealed the coexistence of crystalline and amorphous phases, exhibiting a characteristic honeycomb structure. In testing conducted in 0.6 mol/L HCl and 0.6 mol/L NaCl solutions, the honeycomb Cu-B alloy has excellent corrosion resistance compared with Cu-30Ni alloy. The hardness of the alloy reached 3.8 GPa, surpassing other Cu-based alloys and alloys with good corrosion resistance. Additionally, the honeycomb-like Cu-B alloy showed excellent antimicrobial activity against Pseudomonas aeruginosa. Consequently, the honeycomb-structured honeycomb-like Cu-B alloy is deemed suitable for the demanding corrosive environments encountered in offshore engineering applications.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":"58 ","pages":"Article 105861"},"PeriodicalIF":5.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143102107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-01DOI: 10.1016/j.surfin.2025.105855
A. Camarinha , C. Lopes , A. Ferreira , A.C. Alves , F. Vaz
This work investigates the surface behaviour of Ti-based dry electrodes subjected to artificial sweat corrosion, aiming to assess their suitability for long-term neuromuscular rehabilitation in e-health applications. Three types of dry electrodes were prepared by PVD magnetron sputtering, depositing titanium (Ti), titanium dopped with copper (TiCu0.34) and Copper (Cu) thin films on flexible polylactic acid (PLA) polymeric substrates. The electrodes were submitted to corrosion resistance testing using electrochemical methods, including open circuit potential (OCP), potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS). The results were analysed attending to the films’ chemical composition, crystalline structure, roughness, and morphology. Despite exposure to corrosive environments, Ti and TiCu0.34 electrodes exhibited minimal surface degradation, with no significant differences in corrosion rate (passivation current densities of approximately 8 and 11 × 10–6 A·cm-2, respectively). Importantly, the electrical resistivity of the Ti-based electrodes remained stable, with post-corrosion values (TiCu0.34: 10 µΩ·m, Ti: 9 µΩ·m) remaining within the pre-corrosion range (< 10.0 µΩ·m), indicating strong surface integrity. The findings underscore the strong corrosion resistance and consistent electrical performance of TiCu0.34 thin films, making them promising candidates for long-term use in wearable e-health devices.
{"title":"A comparative study of the corrosion behaviour of flexible dry electrodes based on Ti-Cu thin films","authors":"A. Camarinha , C. Lopes , A. Ferreira , A.C. Alves , F. Vaz","doi":"10.1016/j.surfin.2025.105855","DOIUrl":"10.1016/j.surfin.2025.105855","url":null,"abstract":"<div><div>This work investigates the surface behaviour of Ti-based dry electrodes subjected to artificial sweat corrosion, aiming to assess their suitability for long-term neuromuscular rehabilitation in e-health applications. Three types of dry electrodes were prepared by PVD magnetron sputtering, depositing titanium (Ti), titanium dopped with copper (TiCu<sub>0.34</sub>) and Copper (Cu) thin films on flexible polylactic acid (PLA) polymeric substrates. The electrodes were submitted to corrosion resistance testing using electrochemical methods, including open circuit potential (OCP), potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS). The results were analysed attending to the films’ chemical composition, crystalline structure, roughness, and morphology. Despite exposure to corrosive environments, Ti and TiCu<sub>0.34</sub> electrodes exhibited minimal surface degradation, with no significant differences in corrosion rate (passivation current densities of approximately 8 and 11 × 10<sup>–6</sup> A·cm<sup>-2</sup>, respectively). Importantly, the electrical resistivity of the Ti-based electrodes remained stable, with post-corrosion values (TiCu<sub>0.34</sub>: 10 µΩ·m, Ti: 9 µΩ·m) remaining within the pre-corrosion range (< 10.0 µΩ·m), indicating strong surface integrity. The findings underscore the strong corrosion resistance and consistent electrical performance of TiCu<sub>0.34</sub> thin films, making them promising candidates for long-term use in wearable e-health devices.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":"58 ","pages":"Article 105855"},"PeriodicalIF":5.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2025-02-01DOI: 10.1016/j.surfin.2025.105814
Guohua Fan , Jinke Song , Yanan Tang , Xiaoting Song , Yao Liu
Dielectric modulation is arresting in electrical and electronic fields, and high-k is particularly important in applications like energy conversion and pulse power supply. Herein, an innovative strategy that different from conventional practices was adopted to boost the dielectric constant of PVDF-based dielectrics via involving an epsilon-negative layer in the laminates. The epsilon-negative layer was obtained based on the plasmonic state in percolating graphene networks. After stacking with the epsilon-positive layer containing core-shell BaTiO3@SiO2 fillers, dielectric constant of the laminated composites was improved, and it increased constantly with the increasing thickness ratio of the epsilon-negative layer. It's ascertained the boost in dielectric constant was related to the multiple interfacial polarizations inside the layered composites, and the dielectric loss was suppressed by the low loss epsilon-positive layer. Therefore, synergism of epsilon-negative and positive layers in the enhancement of dielectric performance was elucidated, which developed a new avenue to obtain high-k dielectrics by the means of laminated composites.
{"title":"Boosting dielectric constant of laminated composites by involving an epsilon-negative layer","authors":"Guohua Fan , Jinke Song , Yanan Tang , Xiaoting Song , Yao Liu","doi":"10.1016/j.surfin.2025.105814","DOIUrl":"10.1016/j.surfin.2025.105814","url":null,"abstract":"<div><div>Dielectric modulation is arresting in electrical and electronic fields, and high-<em>k</em> is particularly important in applications like energy conversion and pulse power supply. Herein, an innovative strategy that different from conventional practices was adopted to boost the dielectric constant of PVDF-based dielectrics via involving an epsilon-negative layer in the laminates. The epsilon-negative layer was obtained based on the plasmonic state in percolating graphene networks. After stacking with the epsilon-positive layer containing core-shell BaTiO<sub>3</sub>@SiO<sub>2</sub> fillers, dielectric constant of the laminated composites was improved, and it increased constantly with the increasing thickness ratio of the epsilon-negative layer. It's ascertained the boost in dielectric constant was related to the multiple interfacial polarizations inside the layered composites, and the dielectric loss was suppressed by the low loss epsilon-positive layer. Therefore, synergism of epsilon-negative and positive layers in the enhancement of dielectric performance was elucidated, which developed a new avenue to obtain high-<em>k</em> dielectrics by the means of laminated composites.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":"58 ","pages":"Article 105814"},"PeriodicalIF":5.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143101095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2025-02-01DOI: 10.1016/j.surfin.2025.105873
Dongdong Song , Dong Xu , Wenxiang Qin , Zhiyuan Cui , Yuqian Zheng , Qian Zhou , Hongxia Wan
The surface properties of the substrate is one of the fundamental and important factors affecting the interfacial compatibility of waterborne rust repair coatings with aluminium alloy substrates. This paper analyses the effect of the composition and structural characteristics of corrosion products on the surface of corroded aluminum alloys on the interfacial compatibility of coatings with the substrate by means of laser confocal, scanning electron microscopy (SEM), Raman, contact angle testing, electrochemical impedance spectroscopy (EIS) and adhesion testing. The results indicate that the corrosion products on the aluminum alloy surface consist of β-Al(OH)3, γ-AlOOH, and AlCl3 layers. These corrosion products facilitate the infiltration and accumulation of corrosive media, thereby accelerating coating degradation. As the corrosion duration increases, the protective capability of the coating diminishes, leading to significant interfacial delamination. The oxide film formed on the chemically anodized treatment effectively prevents further penetration of corrosive media, thereby enhancing the corrosion resistance of the coating and reducing the extent of interfacial debonding. This paper examines the influence of substrate surface properties on the interfacial compatibility between waterborne rust repair coatings and aluminum alloys, providing foundational guidance for the development of waterborne rust repair coatings tailored for aluminum alloys.
{"title":"Influence of surface properties on interfacial compatibility between coating and substrate","authors":"Dongdong Song , Dong Xu , Wenxiang Qin , Zhiyuan Cui , Yuqian Zheng , Qian Zhou , Hongxia Wan","doi":"10.1016/j.surfin.2025.105873","DOIUrl":"10.1016/j.surfin.2025.105873","url":null,"abstract":"<div><div>The surface properties of the substrate is one of the fundamental and important factors affecting the interfacial compatibility of waterborne rust repair coatings with aluminium alloy substrates. This paper analyses the effect of the composition and structural characteristics of corrosion products on the surface of corroded aluminum alloys on the interfacial compatibility of coatings with the substrate by means of laser confocal, scanning electron microscopy (SEM), Raman, contact angle testing, electrochemical impedance spectroscopy (EIS) and adhesion testing. The results indicate that the corrosion products on the aluminum alloy surface consist of β-Al(OH)<sub>3</sub>, γ-AlOOH, and AlCl<sub>3</sub> layers. These corrosion products facilitate the infiltration and accumulation of corrosive media, thereby accelerating coating degradation. As the corrosion duration increases, the protective capability of the coating diminishes, leading to significant interfacial delamination. The oxide film formed on the chemically anodized treatment effectively prevents further penetration of corrosive media, thereby enhancing the corrosion resistance of the coating and reducing the extent of interfacial debonding. This paper examines the influence of substrate surface properties on the interfacial compatibility between waterborne rust repair coatings and aluminum alloys, providing foundational guidance for the development of waterborne rust repair coatings tailored for aluminum alloys.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":"58 ","pages":"Article 105873"},"PeriodicalIF":5.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143101591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2025-02-01DOI: 10.1016/j.surfin.2025.105853
S Smera , Kuyyadi P. Biju , Manathanath Puzhakkara Binitha
The photocatalytic activity of defect-induced Calcium Titanate (CaTiO3) particles, synthesized via the hydrothermal method without any template or surfactant, has been examined. Defect engineering was attained by changing the annealing temperature from 100°C to 800 °C. Various characterization techniques were employed to analyze their structural, morphological, and optical properties. X-ray diffraction analysis by Rietveld Refinement documented that all the CaTiO3 particles have an orthorhombic Pbnm crystal structure. The photocatalytic activity was estimated by inspecting the photodegradation of Rhodamine B (RhB) under UV light, which revealed that the process tracks pseudo-first-order kinetics. Photo degradation mechanism was further confirmed via High Performance Liquid Chromatography (HPLC) and Total Organic Carbon (TOC) measurements. Our findings demonstrated that CaTiO3 particles annealed at a low-temperature range, particularly at 100 °C, exhibit high photocatalytic efficiency and hydroxyl radicals and holes are identified as the active species in this sample. This enhanced performance is correlated to the presence of defects within the samples. Transmission Electron Microscopy and X-ray Photoelectron Spectroscopy exposed surface-disordered features in samples annealed at lower temperatures. The O1 s spectra from XPS analysis exhibited peaks corresponding to oxygen vacancy-related defect sites at 531.3 eV with the relative intensity of these peaks diminished with thermal treatment. Additionally, Raman spectroscopy detected disordered crystal characteristics in these samples. This work offers new insights into the photocatalytic performance of bare CaTiO3 particles. It lays the foundation for developing cost-effective synthesis and annealing processes for photocatalytically active materials.
{"title":"Unveiling the role of defects in optimizing photocatalytic CaTiO3 nanoparticles","authors":"S Smera , Kuyyadi P. Biju , Manathanath Puzhakkara Binitha","doi":"10.1016/j.surfin.2025.105853","DOIUrl":"10.1016/j.surfin.2025.105853","url":null,"abstract":"<div><div>The photocatalytic activity of defect-induced Calcium Titanate (CaTiO<sub>3</sub>) particles, synthesized via the hydrothermal method without any template or surfactant, has been examined. Defect engineering was attained by changing the annealing temperature from 100°C to 800 °C. Various characterization techniques were employed to analyze their structural, morphological, and optical properties. X-ray diffraction analysis by Rietveld Refinement documented that all the CaTiO<sub>3</sub> particles have an orthorhombic Pbnm crystal structure. The photocatalytic activity was estimated by inspecting the photodegradation of Rhodamine B (RhB) under UV light, which revealed that the process tracks pseudo-first-order kinetics. Photo degradation mechanism was further confirmed via High Performance Liquid Chromatography (HPLC) and Total Organic Carbon (TOC) measurements. Our findings demonstrated that CaTiO<sub>3</sub> particles annealed at a low-temperature range, particularly at 100 °C, exhibit high photocatalytic efficiency and hydroxyl radicals and holes are identified as the active species in this sample. This enhanced performance is correlated to the presence of defects within the samples. Transmission Electron Microscopy and X-ray Photoelectron Spectroscopy exposed surface-disordered features in samples annealed at lower temperatures. The O1 s spectra from XPS analysis exhibited peaks corresponding to oxygen vacancy-related defect sites at 531.3 eV with the relative intensity of these peaks diminished with thermal treatment. Additionally, Raman spectroscopy detected disordered crystal characteristics in these samples. This work offers new insights into the photocatalytic performance of bare CaTiO<sub>3</sub> particles. It lays the foundation for developing cost-effective synthesis and annealing processes for photocatalytically active materials.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":"58 ","pages":"Article 105853"},"PeriodicalIF":5.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143102100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Iron phthalocyanine (FePc) with self-assemble properties was used to construct microstructures on carbon fiber (CF). Morphology, roughness and wettability of modified CF were characterized. Then, poly(arylene ether nitriles) (PEN) was chosen to fabricate CF reinforced composites and the interfacial compatibility of composites was investigated by SEM and their viscoelastic properties. Rheological properties including linear viscoelastic region, storage/loss modulus, and viscosity were investigated. Besides, dynamic mechanical properties of the composites were studied under different frequency and the apparent activation energy of glass transition was calculated. Results showed that using a proper PEN solution concentration to impregnate FePc microstructures modified CF could help to form better mechanical interlocking on interface. Besides, influence of shape, size and density microstructures on forming mechanical interlocking was studied and discussed. Results revealed that granule-like microstructures, reducing the size of microstructure, and decreasing the distance between microstructures were benefit to forming better mechanical interlocking on interface. Based on the researches, mechanism of improved interfacial compatibility through forming mechanical interlocking was proposed and the interlaminar shear strength (ILSS) of the composites were studied.
{"title":"Investigation on the interfacial compatibility of microstructures modified carbon fiber-reinforced thermoplastic composites through their viscoelastic properties","authors":"Dengxun Ren, Xiaobo Liu, Mingzhen Xu, Xianzhong Tang","doi":"10.1016/j.surfin.2025.105884","DOIUrl":"10.1016/j.surfin.2025.105884","url":null,"abstract":"<div><div>Iron phthalocyanine (FePc) with self-assemble properties was used to construct microstructures on carbon fiber (CF). Morphology, roughness and wettability of modified CF were characterized. Then, poly(arylene ether nitriles) (PEN) was chosen to fabricate CF reinforced composites and the interfacial compatibility of composites was investigated by SEM and their viscoelastic properties. Rheological properties including linear viscoelastic region, storage/loss modulus, and viscosity were investigated. Besides, dynamic mechanical properties of the composites were studied under different frequency and the apparent activation energy of glass transition was calculated. Results showed that using a proper PEN solution concentration to impregnate FePc microstructures modified CF could help to form better mechanical interlocking on interface. Besides, influence of shape, size and density microstructures on forming mechanical interlocking was studied and discussed. Results revealed that granule-like microstructures, reducing the size of microstructure, and decreasing the distance between microstructures were benefit to forming better mechanical interlocking on interface. Based on the researches, mechanism of improved interfacial compatibility through forming mechanical interlocking was proposed and the interlaminar shear strength (ILSS) of the composites were studied.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":"58 ","pages":"Article 105884"},"PeriodicalIF":5.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143102105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2025-02-01DOI: 10.1016/j.surfin.2024.105717
Balaji Panchal , Yuzhuang Sun , Chia-Hung Su , Bangjun Liu , Qiaojing Zhao , Cunliang Zhao , Kai Bian , Jinxi Wang
The present study demonstrates a one-step preparation of a sulfonated coal–based solid acid catalyst (CFA250–PA–SO3H). The catalyst was derived from coal fly ash (CFA) by undergoing carbonization and sulfonation with concentrated 1,3–propanesulfonic acid. The reaction took place at a temperature of 120 °C for 3.5 h with a constant agitation speed of 100 rpm. The ratio of carbonized CFA250–PA to 1,3–propanesulfonic acid was 3:8 wt/wt. As a result, the catalyst surface had a relatively high density of acidic –SO3H sites attached. The mesoporous CFA250–PA–SO3H catalyst with an acid density of 9.336 mmol/g was synthesized by chemically treating CFA, a waste product of coal–burning power plants. Using phosphoric acid, the CFA was calcined at 250 °C and then sulfonated at 120 °C with 1, 3–propane sulfonic acid. The CFA250–PA–SO3H exhibited higher surface acidity and catalytic activity due to increased acidity and larger surface area (105 m2/g). The characteristics of the synthesized catalyst were determined using FT–IR spectroscopy, SEM images, TG analysis, X–ray photon spectroscopy (XPS), and N2–adsorption and desorption isotherm, and the acidity was determined by titration. The mesoporous CFA250–PA–SO3H catalyst was then used to esterify oleic acid in a catalytic activity test. During the esterification reaction performed under optimal conditions (ratio of diethyl carbonate (4.36 g) to oleic acid (2.82 g), 3.5 wt.% catalyst concentration, 100 rpm agitation speed at 82 °C), the CFA250–PA–SO3H catalyst exhibited high activity (94.50% ethyl oleate for 2 h) and it stable for up to five cycles of recycling. In addition, this catalyst could be used to replace conventional environmentally hazardous homogeneous liquid acids through a solid acid–based catalytic process. This evaluation demonstrates that the technology is a very promising approach for developing low-cost and environmentally sustainable energy sources.
{"title":"Reusable CFA250–PA–SO3H catalyst derived from coal ash a potential method for fuel synthesis","authors":"Balaji Panchal , Yuzhuang Sun , Chia-Hung Su , Bangjun Liu , Qiaojing Zhao , Cunliang Zhao , Kai Bian , Jinxi Wang","doi":"10.1016/j.surfin.2024.105717","DOIUrl":"10.1016/j.surfin.2024.105717","url":null,"abstract":"<div><div>The present study demonstrates a one-step preparation of a sulfonated coal–based solid acid catalyst (CFA<sub>250</sub>–PA–SO<sub>3</sub>H). The catalyst was derived from coal fly ash (CFA) by undergoing carbonization and sulfonation with concentrated 1,3–propanesulfonic acid. The reaction took place at a temperature of 120 °C for 3.5 h with a constant agitation speed of 100 rpm. The ratio of carbonized CFA<sub>250</sub>–PA to 1,3–propanesulfonic acid was 3:8 wt/wt. As a result, the catalyst surface had a relatively high density of acidic –SO<sub>3</sub>H sites attached. The mesoporous CFA<sub>250</sub>–PA–SO<sub>3</sub>H catalyst with an acid density of 9.336 mmol/g was synthesized by chemically treating CFA, a waste product of coal–burning power plants. Using phosphoric acid, the CFA was calcined at 250 °C and then sulfonated at 120 °C with 1, 3–propane sulfonic acid. The CFA<sub>250</sub>–PA–SO<sub>3</sub>H exhibited higher surface acidity and catalytic activity due to increased acidity and larger surface area (105 m<sup>2</sup>/g). The characteristics of the synthesized catalyst were determined using FT–IR spectroscopy, SEM images, TG analysis, X–ray photon spectroscopy (XPS), and N<sub>2</sub>–adsorption and desorption isotherm, and the acidity was determined by titration. The mesoporous CFA<sub>250</sub>–PA–SO<sub>3</sub>H catalyst was then used to esterify oleic acid in a catalytic activity test. During the esterification reaction performed under optimal conditions (ratio of diethyl carbonate (4.36 g) to oleic acid (2.82 g), 3.5 wt.% catalyst concentration, 100 rpm agitation speed at 82 °C), the CFA<sub>250</sub>–PA–SO<sub>3</sub>H catalyst exhibited high activity (94.50% ethyl oleate for 2 h) and it stable for up to five cycles of recycling. In addition, this catalyst could be used to replace conventional environmentally hazardous homogeneous liquid acids through a solid acid–based catalytic process. This evaluation demonstrates that the technology is a very promising approach for developing low-cost and environmentally sustainable energy sources.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":"58 ","pages":"Article 105717"},"PeriodicalIF":5.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143102113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2025-02-01DOI: 10.1016/j.surfin.2025.105952
Jianan Zhang, Jinfeng Liu, Song Chen, Yixuan Wang, Weiyi Chen
Hollow microfibers (HMFs) are extensively employed as cell-supporting matrices in the biomedical applications. In this study, titania nanoparticle (NP) HMFs and titania nanotube (NT) HMFs were synthesized and their microstructure, in vitro biocompatibility and drug delivery property were investigated. Titania NP HMFs were first synthesized using gelatin fibers as sacrificial templates via a sol-gel route and then in situ hydrothermally transformed to titania NT HMFs. The resulting HMFs were systematically characterized by FE-SEM, TEM, XRD, FT-IR, XPS, and N2 adsorption–desorption techniques. SEM observations show that titania NP HMFs had diameters of 50–200 µm and were constructed by numerous titania NPs with diameters of 50–100 nm, while titania NT HMFs had similar diameters and were constructed by numerous titania NTs with diameters of 10–20 nm. The formation of titania NTs made titania NT HMFs with a nanofibrous surface architecture. TEM observations show that each titania NT had a hollow structure. XRD patterns indicate that titania NT HMFs consisted of both rutile and anatase titania phases. Both types of HMFs showed good biocompatibility and supported adhesion and proliferation of osteoblast MC3T3-E1 cells on their surfaces. Compared to titania NP HMFs, titania NT HMFs enhanced cell adhesion and proliferation due to their nanofibrous surface architectures. Additionally, titania NT HMFs also showed higher drug loading efficiency for tetracycline hydrochloride (model drug) and maintained the biological efficiency of tetracycline hydrochloride against the growth of Escherichia coli. The present titania NT HMFs have the potential as drug-laden cell-supporting matrices.
{"title":"Fabrication, microstructure, in vitro biocompatibility, and drug delivery property of titania nanotube-assembled hollow microfibers","authors":"Jianan Zhang, Jinfeng Liu, Song Chen, Yixuan Wang, Weiyi Chen","doi":"10.1016/j.surfin.2025.105952","DOIUrl":"10.1016/j.surfin.2025.105952","url":null,"abstract":"<div><div>Hollow microfibers (HMFs) are extensively employed as cell-supporting matrices in the biomedical applications. In this study, titania nanoparticle (NP) HMFs and titania nanotube (NT) HMFs were synthesized and their microstructure, in vitro biocompatibility and drug delivery property were investigated. Titania NP HMFs were first synthesized using gelatin fibers as sacrificial templates via a sol-gel route and then in situ hydrothermally transformed to titania NT HMFs. The resulting HMFs were systematically characterized by FE-SEM, TEM, XRD, FT-IR, XPS, and N<sub>2</sub> adsorption–desorption techniques. SEM observations show that titania NP HMFs had diameters of 50–200 µm and were constructed by numerous titania NPs with diameters of 50–100 nm, while titania NT HMFs had similar diameters and were constructed by numerous titania NTs with diameters of 10–20 nm. The formation of titania NTs made titania NT HMFs with a nanofibrous surface architecture. TEM observations show that each titania NT had a hollow structure. XRD patterns indicate that titania NT HMFs consisted of both rutile and anatase titania phases. Both types of HMFs showed good biocompatibility and supported adhesion and proliferation of osteoblast MC3T3-E1 cells on their surfaces. Compared to titania NP HMFs, titania NT HMFs enhanced cell adhesion and proliferation due to their nanofibrous surface architectures. Additionally, titania NT HMFs also showed higher drug loading efficiency for tetracycline hydrochloride (model drug) and maintained the biological efficiency of tetracycline hydrochloride against the growth of Escherichia coli. The present titania NT HMFs have the potential as drug-laden cell-supporting matrices.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":"59 ","pages":"Article 105952"},"PeriodicalIF":5.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143093195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2025-02-01DOI: 10.1016/j.surfin.2025.105816
Abdelfattah Amari , Ali B.M. Ali , Mohamed A. Ismail , M.A. Diab , Heba A. El-Sabban , Elyor Saitov , Anvar Reyimberganov , Noureddine Elboughdiri
The development of efficient photocatalysts is pivotal for advancing solar-driven processes, particularly for simultaneous pollutant degradation and hydrogen (H₂) generation. In this study, a novel Fe₂O₃/Bi₂O₃/In₂S₃ (FB/IS) heterojunction photocatalyst was synthesized via a facile preparation method. The optimized 30-FB/IS composition (3o wt.% loading of Fe₂O₃/Bi₂O₃/ on the In₂S₃) exhibited superior photocatalytic performance under visible light irradiation, achieving a hydrogen production rate of 590.36 μmol⋅g⁻¹⋅h⁻¹ and a 98 % degradation efficiency for Enrofloxacin (ENX). Detailed morphological, structural, optical and electrochemical characterization using SEM, XRD, XPS, TEM, BET, photocurrent response, Mott-Schottky, PL, EIS, and ESR techniques confirmed the formation of an S-scheme heterojunction, which efficiently enhanced charge separation and minimized electron-hole recombination. The 30-FB/IS catalyst demonstrated optimal kinetics, with a rate constant of 0.043 min⁻¹ for ENX degradation, outperforming binary and single-component catalysts. ESR and scavenging experiments identified hydroxyl radicals (•OH) and superoxide radicals (•O₂⁻) as the primary reactive species driving the degradation process. Furthermore, LC-MS analysis revealed three potential degradation pathways for ENX. The photocatalyst showed excellent stability, retaining 85 % of its initial activity after five cycles, and demonstrated broad-spectrum pollutant degradation, including in real water samples. These findings underscore the potential of the FB/IS heterojunction system for practical applications in both clean energy production and environmental remediation.
{"title":"Enhanced photocatalytic water splitting for green hydrogen production and enrofloxacin degradation using a novel In2S3-Based ternary photocatalyst: Fabrication and mechanism insights","authors":"Abdelfattah Amari , Ali B.M. Ali , Mohamed A. Ismail , M.A. Diab , Heba A. El-Sabban , Elyor Saitov , Anvar Reyimberganov , Noureddine Elboughdiri","doi":"10.1016/j.surfin.2025.105816","DOIUrl":"10.1016/j.surfin.2025.105816","url":null,"abstract":"<div><div>The development of efficient photocatalysts is pivotal for advancing solar-driven processes, particularly for simultaneous pollutant degradation and hydrogen (H₂) generation. In this study, a novel Fe₂O₃/Bi₂O₃/In₂S₃ (FB/IS) heterojunction photocatalyst was synthesized via a facile preparation method. The optimized 30-FB/IS composition (3o wt.% loading of Fe₂O₃/Bi₂O₃/ on the In₂S₃) exhibited superior photocatalytic performance under visible light irradiation, achieving a hydrogen production rate of 590.36 μmol⋅g⁻¹⋅h⁻¹ and a 98 % degradation efficiency for Enrofloxacin (ENX). Detailed morphological, structural, optical and electrochemical characterization using SEM, XRD, XPS, TEM, BET, photocurrent response, Mott-Schottky, PL, EIS, and ESR techniques confirmed the formation of an S-scheme heterojunction, which efficiently enhanced charge separation and minimized electron-hole recombination. The 30-FB/IS catalyst demonstrated optimal kinetics, with a rate constant of 0.043 min⁻¹ for ENX degradation, outperforming binary and single-component catalysts. ESR and scavenging experiments identified hydroxyl radicals (•OH) and superoxide radicals (•O₂⁻) as the primary reactive species driving the degradation process. Furthermore, LC-MS analysis revealed three potential degradation pathways for ENX. The photocatalyst showed excellent stability, retaining 85 % of its initial activity after five cycles, and demonstrated broad-spectrum pollutant degradation, including in real water samples. These findings underscore the potential of the FB/IS heterojunction system for practical applications in both clean energy production and environmental remediation.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":"58 ","pages":"Article 105816"},"PeriodicalIF":5.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2025-02-01DOI: 10.1016/j.surfin.2025.105807
Chaoqiang Li , Xiangyu Xu , Aizhong Jia
Photocatalytic reduction of CO2 to chemical fuels is a promising strategy to alleviate the greenhouse effect and energy crisis. This article successfully fabricated Ag/CdS composites with ohmic junction using a two-step method and further verified them by DFT calculations. Meanwhile, photoelectrochemical and electron paramagnetic resonance tests show that Ag/CdS has higher photocurrent density and lower charge transfer resistance, suggesting that the ohmic junction achieves ultrafast electron transfer from CdS to Ag under light irradiation, significantly promoting the separation of photogenerated carriers. Furthermore, the localized plasmon resonance (LSPR) of Ag enhances the light absorption of the catalyst and generates a large number of hot electrons for the photocatalytic reduction reaction. The synergistic effect of ohmic junction and LSPR gives high electron density at the reaction site, which promotes the multiple proton-coupled electron reactions leading to highly selective photoconversion of CO2 to CH4. Under the optimized conditions, the CH4 yield of the synthesized Ag/CdS is 68.6 μmol·g−1·h−1, which is 25.4 times higher than that of bare CdS, and the CH4 selectivity increases from 53.8 % to 90.1 %. This study provides a new idea for the design of CdS-based materials for highly selective reduction of CO2 to CH4.
{"title":"Fabricating an ohmic junction of Ag/CdS for highly efficient multi-electron reduction of CO2 to CH4","authors":"Chaoqiang Li , Xiangyu Xu , Aizhong Jia","doi":"10.1016/j.surfin.2025.105807","DOIUrl":"10.1016/j.surfin.2025.105807","url":null,"abstract":"<div><div>Photocatalytic reduction of CO<sub>2</sub> to chemical fuels is a promising strategy to alleviate the greenhouse effect and energy crisis. This article successfully fabricated Ag/CdS composites with ohmic junction using a two-step method and further verified them by DFT calculations. Meanwhile, photoelectrochemical and electron paramagnetic resonance tests show that Ag/CdS has higher photocurrent density and lower charge transfer resistance, suggesting that the ohmic junction achieves ultrafast electron transfer from CdS to Ag under light irradiation, significantly promoting the separation of photogenerated carriers. Furthermore, the localized plasmon resonance (LSPR) of Ag enhances the light absorption of the catalyst and generates a large number of hot electrons for the photocatalytic reduction reaction. The synergistic effect of ohmic junction and LSPR gives high electron density at the reaction site, which promotes the multiple proton-coupled electron reactions leading to highly selective photoconversion of CO<sub>2</sub> to CH<sub>4</sub>. Under the optimized conditions, the CH<sub>4</sub> yield of the synthesized Ag/CdS is 68.6 μmol·g<sup>−1</sup>·h<sup>−1</sup>, which is 25.4 times higher than that of bare CdS, and the CH<sub>4</sub> selectivity increases from 53.8 % to 90.1 %. This study provides a new idea for the design of CdS-based materials for highly selective reduction of CO<sub>2</sub> to CH<sub>4</sub>.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":"58 ","pages":"Article 105807"},"PeriodicalIF":5.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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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