Surfaces and Interfaces最新文献_第9页

Carbon aerogel and xerogel composites with polypyrrole as electrocatalysts for oxygen reduction reaction

IF 5.7 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Surfaces and Interfaces

Pub Date : 2025-02-24 DOI: 10.1016/j.surfin.2025.106071

Dušan Mladenović , Meryem Samancı , Diogo M.F. Santos , Ayşe Bayrakçeken , Biljana Šljukić

Due to their exceptional electrical conductivity and stability, carbon-based conductive polymer composites have attracted attention as non-platinum group metal (non-PGM) catalysts for the oxygen reduction reaction (ORR), a crucial reaction in electrochemical energy conversion. In this study, carbon aerogels (CA) and xerogels (CX, CXA) were first synthesized by sol-gel method under different drying conditions, including supercritical drying after solvent exchange of water with acetone (CA), drying under ambient conditions after solvent exchange of water with acetone (CXA), and drying directly under ambient conditions without solvent exchange of water with acetone (CX). Then, polypyrrole (PPy) composites were prepared by chemical polymerization over these carbon-based materials. Scanning and transmission electron microscopy with energy-dispersive X-ray spectroscopy and Raman spectroscopy were carried out on the synthesized CA, CXA, CX, and PPy composites. The electrochemical investigation of the synthesized materials reveals that they catalyze ORR mainly through two-electron reduction of molecular oxygen. The influence of the materials’ synthesis method, structure, and addition of PPy on their activity towards ORR was investigated. The best performance was observed for the CA2 catalyst, demonstrating the highest diffusion-limited current density, the lowest Tafel slope, the highest value of the half-wave potential, and the highest number of exchanged electrons. Furthermore, this material showed good stability during the long-term chronoamperometric study, making it a promising material for long-standing ORR catalysis.

{"title":"Carbon aerogel and xerogel composites with polypyrrole as electrocatalysts for oxygen reduction reaction","authors":"Dušan Mladenović , Meryem Samancı , Diogo M.F. Santos , Ayşe Bayrakçeken , Biljana Šljukić","doi":"10.1016/j.surfin.2025.106071","DOIUrl":"10.1016/j.surfin.2025.106071","url":null,"abstract":"<div><div>Due to their exceptional electrical conductivity and stability, carbon-based conductive polymer composites have attracted attention as non-platinum group metal (non-PGM) catalysts for the oxygen reduction reaction (ORR), a crucial reaction in electrochemical energy conversion. In this study, carbon aerogels (CA) and xerogels (CX, CXA) were first synthesized by sol-gel method under different drying conditions, including supercritical drying after solvent exchange of water with acetone (CA), drying under ambient conditions after solvent exchange of water with acetone (CXA), and drying directly under ambient conditions without solvent exchange of water with acetone (CX). Then, polypyrrole (PPy) composites were prepared by chemical polymerization over these carbon-based materials. Scanning and transmission electron microscopy with energy-dispersive X-ray spectroscopy and Raman spectroscopy were carried out on the synthesized CA, CXA, CX, and PPy composites. The electrochemical investigation of the synthesized materials reveals that they catalyze ORR mainly through two-electron reduction of molecular oxygen. The influence of the materials’ synthesis method, structure, and addition of PPy on their activity towards ORR was investigated. The best performance was observed for the CA2 catalyst, demonstrating the highest diffusion-limited current density, the lowest Tafel slope, the highest value of the half-wave potential, and the highest number of exchanged electrons. Furthermore, this material showed good stability during the long-term chronoamperometric study, making it a promising material for long-standing ORR catalysis.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":"60 ","pages":"Article 106071"},"PeriodicalIF":5.7,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143474518","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}

引用次数: 0

Interfacial charge transfer in LaCoO3/SnS2 heterostructure for boosted photodegradation of environmental organic pollutant

IF 5.7 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Surfaces and Interfaces

Pub Date : 2025-02-24 DOI: 10.1016/j.surfin.2025.106105

K. Sathiyamoorthy , A. Silambarasan , M. Navaneethan , S. Harish

Herein, we report an efficient multicomponent photocatalytic system prepared via ultrasonication of LaCoO₃ and SnS₂ in different weight percentages (X% = 2.5, 5, 7.5 10 and 12.5 % SnS₂) and employed for photodegradation of Alizarin Red S (ARS) and Rhodamine B (RhB) dyes. The synthesized catalysts were subjected to structural, optical, morphological, and electrochemical characterizations. The X-Ray diffraction patterns of LSn-X% (when, X ≤ 12.5 %) were indexed to rhombohedral LaCoO₃ without having any diffraction patterns of SnS₂. However, morphological studies and elemental analysis show the presence of fine dispersion of SnS₂ within the LSn-X% heterostructure. Detailed photocatalytic investigation portrays superior performance of LSn-10 % with a rate constant of 4.9 × 10^–2 min^-1 and 3.2 × 10^-2 min^-1 against ARS and RhB dyes, respectively. Further, the observations from optical and electrochemical studies help to figure out why LSn-10 % offered the best photocatalytic performance among the synthesized catalysts. Radical reveals that the superoxide and hydroxide radicals were found to be the key radicals responsible for photocatalytic degradation of ARS and RhB dyes were The CB and VB potential of LaCoO₃ is found to be 1.25 and -0.99 eV; for SnS₂ it is found to be 1.95 and 0.045 eV. Finally, considering all these observations a possible degradation mechanism was proposed. Overall, highly efficient visible light active photocatalysts were explored which may open the possibility of utilizing the photocatalyst for real-time degradation of environmental pollutants.

{"title":"Interfacial charge transfer in LaCoO3/SnS2 heterostructure for boosted photodegradation of environmental organic pollutant","authors":"K. Sathiyamoorthy , A. Silambarasan , M. Navaneethan , S. Harish","doi":"10.1016/j.surfin.2025.106105","DOIUrl":"10.1016/j.surfin.2025.106105","url":null,"abstract":"<div><div>Herein, we report an efficient multicomponent photocatalytic system prepared via ultrasonication of LaCoO<sub>3</sub> and SnS<sub>2</sub> in different weight percentages (X% = 2.5, 5, 7.5 10 and 12.5 % SnS<sub>2</sub>) and employed for photodegradation of Alizarin Red S (ARS) and Rhodamine B (RhB) dyes. The synthesized catalysts were subjected to structural, optical, morphological, and electrochemical characterizations. The X-Ray diffraction patterns of LSn-X% (when, X ≤ 12.5 %) were indexed to rhombohedral LaCoO<sub>3</sub> without having any diffraction patterns of SnS<sub>2</sub>. However, morphological studies and elemental analysis show the presence of fine dispersion of SnS<sub>2</sub> within the LSn-X% heterostructure. Detailed photocatalytic investigation portrays superior performance of LSn-10 % with a rate constant of 4.9 × 10<sup>–2</sup> min<sup>-1</sup> and 3.2 × 10<sup>-2</sup> min<sup>-1</sup> against ARS and RhB dyes, respectively. Further, the observations from optical and electrochemical studies help to figure out why LSn-10 % offered the best photocatalytic performance among the synthesized catalysts. Radical reveals that the superoxide and hydroxide radicals were found to be the key radicals responsible for photocatalytic degradation of ARS and RhB dyes were The CB and VB potential of LaCoO<sub>3</sub> is found to be 1.25 and -0.99 eV; for SnS<sub>2</sub> it is found to be 1.95 and 0.045 eV. Finally, considering all these observations a possible degradation mechanism was proposed. Overall, highly efficient visible light active photocatalysts were explored which may open the possibility of utilizing the photocatalyst for real-time degradation of environmental pollutants.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":"62 ","pages":"Article 106105"},"PeriodicalIF":5.7,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143579237","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}

引用次数: 0

2.5D femtosecond laser microstructuring of complex surface patterns

IF 5.7 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Surfaces and Interfaces

Pub Date : 2025-02-23 DOI: 10.1016/j.surfin.2025.106099

Jaka Petelin, Jernej Jan Kočica, Jaka Mur, Rok Petkovšek

Surface structuring aimed at improving aerodynamic, hydrodynamic, and wetting properties has gained traction as methods of material processing evolved and the need for highly efficient manufacturing manifested. Femtosecond laser processing has matured as a manufacturing method but remains limited in throughput and scalability due to the high precision required. Here we present a new concept for 2.5-dimensional surface structuring that simultaneously improves processing throughput and precision compared to traditional laser surface structuring approaches, leveraging the pulse-on-demand capabilities of the latest femtosecond laser sources. The approach is compatible with any repeatable and predictable scanning system, where we demonstrate an up to 10-fold increase in processing throughput compared to standard layer-by-layer material removal. Moreover, the precise pulse emission timing enables near-continuous variation in the laser pulse repetition rate, achieving pulse positioning precision equivalent to 30 ns timing steps. Further, we measure the material-dependent ablation response to changing laser pulse repetition rates, identifying intervals where the material removal rate is linearly scalable with the repetition rate while preserving the intrinsic high-quality of ultra-short laser processing. The proof of concept is a single-step femtosecond laser processing of surfaces based on a depth-encoded image input.

{"title":"2.5D femtosecond laser microstructuring of complex surface patterns","authors":"Jaka Petelin, Jernej Jan Kočica, Jaka Mur, Rok Petkovšek","doi":"10.1016/j.surfin.2025.106099","DOIUrl":"10.1016/j.surfin.2025.106099","url":null,"abstract":"<div><div>Surface structuring aimed at improving aerodynamic, hydrodynamic, and wetting properties has gained traction as methods of material processing evolved and the need for highly efficient manufacturing manifested. Femtosecond laser processing has matured as a manufacturing method but remains limited in throughput and scalability due to the high precision required. Here we present a new concept for 2.5-dimensional surface structuring that simultaneously improves processing throughput and precision compared to traditional laser surface structuring approaches, leveraging the pulse-on-demand capabilities of the latest femtosecond laser sources. The approach is compatible with any repeatable and predictable scanning system, where we demonstrate an up to 10-fold increase in processing throughput compared to standard layer-by-layer material removal. Moreover, the precise pulse emission timing enables near-continuous variation in the laser pulse repetition rate, achieving pulse positioning precision equivalent to 30 ns timing steps. Further, we measure the material-dependent ablation response to changing laser pulse repetition rates, identifying intervals where the material removal rate is linearly scalable with the repetition rate while preserving the intrinsic high-quality of ultra-short laser processing. The proof of concept is a single-step femtosecond laser processing of surfaces based on a depth-encoded image input.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":"61 ","pages":"Article 106099"},"PeriodicalIF":5.7,"publicationDate":"2025-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143520930","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}

引用次数: 0

Optimizing banana preservation with bandgap-dependent curcumin-modified Cu-doped-ZnO nanoparticles in chitosan edible coatings

IF 5.7 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Surfaces and Interfaces

Pub Date : 2025-02-23 DOI: 10.1016/j.surfin.2025.106104

Lilia Setya Wahyuni, Nuryono Nuryono, Adhi Dwi Hatmanto

ZnO nanoparticles possess antimicrobial properties and are widely used in food packaging to enhance food safety and shelf life. This study aimed to synthesize and characterize novel Cu-doped ZnO nanoparticles (Cu-ZnO) further modified with curcumin (Cu-ZnO@cur) to improve antibacterial activity by lowering band gap energy. The efficacy of these nanoparticles was evaluated as an active ingredient in chitosan-based edible coatings for banana preservation. The materials were characterized using X-ray diffraction (XRD), Fourier Transform Infrared (FTIR) spectroscopy, UV–visible diffuse reflectance spectroscopy (UV-visible DRS), and Transmission Electron Microscopy (TEM). Antibacterial activity was tested against Staphylococcus aureus (Gram-positive) and Escherichia coli (Gram-negative) using the disc diffusion method. The nanoparticles were then incorporated into a chitosan-based matrix and applied as an edible coating for bananas. Cu3%-ZnO and Cu1%-ZnO@cur nanoparticles exhibited the most potent antibacterial activity, with inhibition zones of 13.67 mm and 9.45 mm (against Staphylococcus aureus) and 11.83 mm and 12.89 mm (against E. coli), respectively. Chitosan coatings containing 1% (w/w) Cu3%-ZnO and Cu%-ZnO@cur significantly reduced banana mass loss by 16.42% and 17.58% after seven days of storage. Our findings highlight their potential as effective, eco-friendly antimicrobial agents for enhancing the shelf life of fresh produce and advancing sustainable food packaging solutions.

{"title":"Optimizing banana preservation with bandgap-dependent curcumin-modified Cu-doped-ZnO nanoparticles in chitosan edible coatings","authors":"Lilia Setya Wahyuni, Nuryono Nuryono, Adhi Dwi Hatmanto","doi":"10.1016/j.surfin.2025.106104","DOIUrl":"10.1016/j.surfin.2025.106104","url":null,"abstract":"<div><div>ZnO nanoparticles possess antimicrobial properties and are widely used in food packaging to enhance food safety and shelf life. This study aimed to synthesize and characterize novel Cu-doped ZnO nanoparticles (Cu-ZnO) further modified with curcumin (Cu-ZnO@cur) to improve antibacterial activity by lowering band gap energy. The efficacy of these nanoparticles was evaluated as an active ingredient in chitosan-based edible coatings for banana preservation. The materials were characterized using X-ray diffraction (XRD), Fourier Transform Infrared (FTIR) spectroscopy, UV–visible diffuse reflectance spectroscopy (UV-visible DRS), and Transmission Electron Microscopy (TEM). Antibacterial activity was tested against <em>Staphylococcus aureus</em> (Gram-positive) and <em>Escherichia coli</em> (Gram-negative) using the disc diffusion method. The nanoparticles were then incorporated into a chitosan-based matrix and applied as an edible coating for bananas. Cu3%-ZnO and Cu1%-ZnO@cur nanoparticles exhibited the most potent antibacterial activity, with inhibition zones of 13.67 mm and 9.45 mm (against <em>Staphylococcus aureus</em>) and 11.83 mm and 12.89 mm (against <em>E. coli</em>), respectively. Chitosan coatings containing 1% (w/w) Cu3%-ZnO and Cu%-ZnO@cur significantly reduced banana mass loss by 16.42% and 17.58% after seven days of storage. Our findings highlight their potential as effective, eco-friendly antimicrobial agents for enhancing the shelf life of fresh produce and advancing sustainable food packaging solutions.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":"61 ","pages":"Article 106104"},"PeriodicalIF":5.7,"publicationDate":"2025-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143511670","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}

引用次数: 0

Carbon veil anode for microbial fuel cells: Comparing the performances of biocatalyst-modified anodes with large–area anodes

IF 5.7 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Surfaces and Interfaces

Pub Date : 2025-02-23 DOI: 10.1016/j.surfin.2025.106103

Karnapa Ajit, Juliana John, Haribabu Krishnan

Extra cellular electron transfer (EET) taking place between microbes and anodes serve crucial in improving MFC performance. Enhancing both biocompatibility and electron conductivity of anodes is crucial for boosting EET efficiency, and biomass-derived electrocatalysts present a cost-effective solution to achieve these improvements. The micro/mesoporous biocatalyst derived from Mango Seed Hull (MSH), with a surface area of 1018.8 m²/g and a pore volume of 0.49 cm³/g, exhibited graphitic carbon characteristics and pyrrolic nitrogen content, enhancing electron conductivity. The electrode surface was characterized by the presence of hydrophilic functional groups -OH, -COOH, -NC which increased its biocompatibility. The biocatalyst-modified CV electrodes exhibited very good anodic capacitance corresponding to a loading of 2 mg/cm² with a value of 115.65 mF/cm² when compared to 26.83 mF/cm² as in the case of bare CV. The electrode produced a maximum power density of 3.34 W/m³ when used as anode in an MFC which was almost a 17.5-fold increase compared to plain CV anode MFC. Increasing the anode surface area without biocatalyst modification led to a rise in ohmic resistance, reaching a maximum of 17.83 Ω for a 15-fold area increase. The highest power performance, 2.88 W/m³, was achieved with a 10-fold increase in surface area. The study confirmed the superior performance of biocatalyst-modified electrodes compared to the large area anode and proposes the scope of biocatalyst modification of CV anode for MFC scaleup in reducing the reactor footprint.

{"title":"Carbon veil anode for microbial fuel cells: Comparing the performances of biocatalyst-modified anodes with large–area anodes","authors":"Karnapa Ajit, Juliana John, Haribabu Krishnan","doi":"10.1016/j.surfin.2025.106103","DOIUrl":"10.1016/j.surfin.2025.106103","url":null,"abstract":"<div><div>Extra cellular electron transfer (EET) taking place between microbes and anodes serve crucial in improving MFC performance. Enhancing both biocompatibility and electron conductivity of anodes is crucial for boosting EET efficiency, and biomass-derived electrocatalysts present a cost-effective solution to achieve these improvements. The micro/mesoporous biocatalyst derived from Mango Seed Hull (MSH), with a surface area of 1018.8 m<sup>2</sup>/g and a pore volume of 0.49 cm<sup>3</sup>/g, exhibited graphitic carbon characteristics and pyrrolic nitrogen content, enhancing electron conductivity. The electrode surface was characterized by the presence of hydrophilic functional groups -OH, -COOH, -NC which increased its biocompatibility. The biocatalyst-modified CV electrodes exhibited very good anodic capacitance corresponding to a loading of 2 mg/cm<sup>2</sup> with a value of 115.65 mF/cm<sup>2</sup> when compared to 26.83 mF/cm<sup>2</sup> as in the case of bare CV. The electrode produced a maximum power density of 3.34 W/m<sup>3</sup> when used as anode in an MFC which was almost a 17.5-fold increase compared to plain CV anode MFC. Increasing the anode surface area without biocatalyst modification led to a rise in ohmic resistance, reaching a maximum of 17.83 Ω for a 15-fold area increase. The highest power performance, 2.88 W/m<sup>3</sup>, was achieved with a 10-fold increase in surface area. The study confirmed the superior performance of biocatalyst-modified electrodes compared to the large area anode and proposes the scope of biocatalyst modification of CV anode for MFC scaleup in reducing the reactor footprint.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":"61 ","pages":"Article 106103"},"PeriodicalIF":5.7,"publicationDate":"2025-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143510378","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}

引用次数: 0

Flexible electrochemical dopamine sensor via heterojunction interface engineerable of monolayer MoS2 and electrospun PVA

IF 5.7 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Surfaces and Interfaces

Pub Date : 2025-02-22 DOI: 10.1016/j.surfin.2025.106095

Xinran Li , Yu Wang , Ni Su , Xiaoming Wen , Ming Zhai , Guobi Chai , Wu Fan , Qingzhao Shi , Ronghan Wei , Qiyan Wang , Qidong Zhang

Dopamine (DA) is a crucial neurotransmitter for the early diagnosis of neurological and psychiatric diseases. However, current biosensors in soft tissues face poor electron transmission at flexible interfaces, leading to signal loss during dynamic movements. This challenge arises from weak adhesion between flexible substrates and sensing materials, creating gaps that impede electron flow.

To address this, we engineered a heterojunction interface using electrospun polyvinyl alcohol (PVA) as a flexible substrate and monolayer MoS₂ as the sensing material for DA. In situ grown Ag nanoparticles (nano-Ag) on the PVA substrate via chemical vapor cross-linking significantly increased the electrode's electrochemical surface area and stability during tensile deformation. Additionally, the decoration with an Au layer using a magnetron sputter enhanced adhesion between MoS₂ and the flexible substrate via Au-S bonds. The cross-linked carbon nanotubes (CNT) between MoS₂ and PVA further improved the electron transport. Electrochemical tests demonstrated that the DA detection range of this flexible sensor was 0.5 to 9.0 μM (R² = 0.99), with a detection limit of 0.426 μM. Flexibility tests showed that the sensor retained 87.4% of its initial activity after 50 cycles of 90° bending.

{"title":"Flexible electrochemical dopamine sensor via heterojunction interface engineerable of monolayer MoS2 and electrospun PVA","authors":"Xinran Li , Yu Wang , Ni Su , Xiaoming Wen , Ming Zhai , Guobi Chai , Wu Fan , Qingzhao Shi , Ronghan Wei , Qiyan Wang , Qidong Zhang","doi":"10.1016/j.surfin.2025.106095","DOIUrl":"10.1016/j.surfin.2025.106095","url":null,"abstract":"<div><div>Dopamine (DA) is a crucial neurotransmitter for the early diagnosis of neurological and psychiatric diseases. However, current biosensors in soft tissues face poor electron transmission at flexible interfaces, leading to signal loss during dynamic movements. This challenge arises from weak adhesion between flexible substrates and sensing materials, creating gaps that impede electron flow.</div><div>To address this, we engineered a heterojunction interface using electrospun polyvinyl alcohol (PVA) as a flexible substrate and monolayer MoS<sub>2</sub> as the sensing material for DA. In situ grown Ag nanoparticles (nano-Ag) on the PVA substrate via chemical vapor cross-linking significantly increased the electrode's electrochemical surface area and stability during tensile deformation. Additionally, the decoration with an Au layer using a magnetron sputter enhanced adhesion between MoS<sub>2</sub> and the flexible substrate via Au-S bonds. The cross-linked carbon nanotubes (CNT) between MoS<sub>2</sub> and PVA further improved the electron transport. Electrochemical tests demonstrated that the DA detection range of this flexible sensor was 0.5 to 9.0 μM (R² = 0.99), with a detection limit of 0.426 μM. Flexibility tests showed that the sensor retained 87.4% of its initial activity after 50 cycles of 90° bending.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":"60 ","pages":"Article 106095"},"PeriodicalIF":5.7,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143487177","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}

引用次数: 0

Behaviour of Zn-MnO2 battery under externally applied magnetic field

IF 5.7 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Surfaces and Interfaces

Pub Date : 2025-02-22 DOI: 10.1016/j.surfin.2025.106100

Sagnik Sarma Choudhury, Nitish Katiyar, Abhishek Sarkar, Ranamay Saha, Shantanu Bhattacharya

Zn-MnO₂ batteries offer high theoretical capacity, low cost, safety, and environmental benefits. However, their commercial potential is limited by zinc dendrite formation and manganese dissolution. Typically, these issues are addressed through internal modifications of the cell. In this study, an external magnetic field is applied to induce Lorentz forces on the Zn²⁺ ions, promoting uniform zinc dissolution and deposition, thereby suppressing dendrite formation. Initially, the morphology evolution of the Zn electrode and the specific discharge capacity of the battery was analysed at different magnetic field strengths. Then the optimum magnetic field strength was used to study the Zn deposition/dissolution and the charge storage behavior at different current densities. UV–Vis spectroscopy and ICP-MS analysis was done to study the electrolyte content during charge/discharge in the presence of the magnetic field. With a 2.91 kG magnetic field, substantial mitigation of dendrite formation and enhanced electrochemical performance was observed, particularly at high charge/discharge rates. Cyclic stability tests showed 83 % capacity retention with the magnetic field after 500 cycles at 1000 mA g⁻¹, compared to 52.9 % without it. Additionally, manganese dissolution was reduced as Mn²⁺ ions were retained within the positive electrode under the magnetic field. This approach highlights the potential of magnetic field-assisted ZIBs for fast charging applications and suggests exploring the synergy of combining magnetic fields with internal cell modifications to achieve further improved electrochemical performance.

{"title":"Behaviour of Zn-MnO2 battery under externally applied magnetic field","authors":"Sagnik Sarma Choudhury, Nitish Katiyar, Abhishek Sarkar, Ranamay Saha, Shantanu Bhattacharya","doi":"10.1016/j.surfin.2025.106100","DOIUrl":"10.1016/j.surfin.2025.106100","url":null,"abstract":"<div><div>Zn-MnO<sub>2</sub> batteries offer high theoretical capacity, low cost, safety, and environmental benefits. However, their commercial potential is limited by zinc dendrite formation and manganese dissolution. Typically, these issues are addressed through internal modifications of the cell. In this study, an external magnetic field is applied to induce Lorentz forces on the Zn<sup>2+</sup> ions, promoting uniform zinc dissolution and deposition, thereby suppressing dendrite formation. Initially, the morphology evolution of the Zn electrode and the specific discharge capacity of the battery was analysed at different magnetic field strengths. Then the optimum magnetic field strength was used to study the Zn deposition/dissolution and the charge storage behavior at different current densities. UV–Vis spectroscopy and ICP-MS analysis was done to study the electrolyte content during charge/discharge in the presence of the magnetic field. With a 2.91 kG magnetic field, substantial mitigation of dendrite formation and enhanced electrochemical performance was observed, particularly at high charge/discharge rates. Cyclic stability tests showed 83 % capacity retention with the magnetic field after 500 cycles at 1000 mA g<sup>−1</sup>, compared to 52.9 % without it. Additionally, manganese dissolution was reduced as Mn<sup>2+</sup> ions were retained within the positive electrode under the magnetic field. This approach highlights the potential of magnetic field-assisted ZIBs for fast charging applications and suggests exploring the synergy of combining magnetic fields with internal cell modifications to achieve further improved electrochemical performance.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":"61 ","pages":"Article 106100"},"PeriodicalIF":5.7,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143520820","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}

引用次数: 0

Constructing coordinately unsaturated Co-N3 sites for enhanced peroxymonosulfate activation performance in Fenton-like reaction

IF 5.7 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Surfaces and Interfaces

Pub Date : 2025-02-22 DOI: 10.1016/j.surfin.2025.106091

Xu Guo , Simin Yang , Yanqiu Zhang , Hongyan Liu , Wenwen Lv , Jie Wu , Jiaxu Zhang , Hong Wang

As a Lewis base in Fenton-like reaction, peroxymonosulfate (PMS) could be activated by the hetero-atoms doped graphitized carbon (GC) via a non-radical activation path. The activation performance was boosted by tailoring electron cloud dispersion. In this paper, we have simultaneously realized tailoring electron cloud dispersion and improving Lewis acidity on catalyst surface by introducing a coordinately unsaturated Co-N₃ sites into the GC lattice. In Fenton-like reaction, 77.0 % of tetracycline (TC) were degraded within merely 10.0 s, much faster than the reference catalysts, including Co-N₄@GC without the coordinately unsaturated sites. Mechanism studies revealed the electron transferred from PMS to catalyst, and ¹O₂ was functioned as the main radicals for TC degradation. Benefiting from the non-radical activation path, the degradation performance was little interfered by various anions and pH values, leading to good environmental adaption and reusability. This study provided a new method to construct coordinately unsaturated metal-N sites to enhance PMS activation in Fenton-like reaction.

作为 Fenton-like 反应中的路易斯碱，过一硫酸盐（PMS）可通过掺杂杂原子的石墨化碳（GC）的非径向活化途径被活化。通过调整电子云的分散，活化性能得以提高。本文通过在石墨化碳晶格中引入配位不饱和 Co-N3 位点，同时实现了电子云分散的定制和催化剂表面路易斯酸度的提高。在类似芬顿的反应中，仅在 10.0 秒内就降解了 77.0% 的四环素（TC），比参考催化剂（包括未引入配位不饱和位点的 Co-N4@GC）快得多。机理研究表明，电子从 PMS 转移到催化剂，1O2 是 TC 降解的主要自由基。得益于非自由基活化途径，降解性能受各种阴离子和 pH 值的干扰很小，具有良好的环境适应性和可重复使用性。该研究为构建配位不饱和金属-N位点以增强类芬顿反应中 PMS 的活化提供了一种新方法。

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引用次数: 0

Bismuth-based ternary heterojunction prepared by acetate-glycol recyclable system for excellent glyphosate degradation

IF 5.7 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Surfaces and Interfaces

Pub Date : 2025-02-22 DOI: 10.1016/j.surfin.2025.106049

Jingying Wang , Zengyue Chen , Xiaochen Liu , Zhansheng Wu , Li Jin

Glyphosate herbicide is commonly used to kill weeds in crops because of its high efficiency and low cost. However, excessive use of glyphosate not only leads to soil, surface water, and groundwater pollution, but also presents a potential risk to human health. Photocatalysis as an advanced oxidation technology can efficiently and environmentally degrade glyphosate, and bismuth-based photocatalysts have garnered extensive attention for their strong photo-oxidation capabilities. In this work, a green reaction route was developed to synthesize Bi-based/g-C₃N₄/CdS ternary heterojunction photocatalysts for glyphosate removal, by combining acetic acid-glycol synergistic systems with atmospheric pressure microwave methods. By regulating the structure and composition of the catalyst, excellent photodegradation and stabilization of glyphosate by BiOCl/g-C₃N₄/CdS (> 98 % removal of glyphosate in 90 min). This study is of great significance for the green preparation and application of efficient photocatalysts for glyphosate removal, and the development of other recyclable systems.

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引用次数: 0

The impact of composite graphene/Ni coating on nanoindentation of Ni: Deformation mechanism

IF 5.7 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Surfaces and Interfaces

Pub Date : 2025-02-22 DOI: 10.1016/j.surfin.2025.106093

Karina A. Krylova , Liliya R. Safina , Yury V. Rusalev , Julia A. Baimova

To improve the corrosion and wear resistance of the nickel surface, a protective graphene-based composite coating can be used. Electrodeposition can be used to cover the different metal surfaces with the composite nanocoatings for future application in various industries. Due to the structural transition that occurs at the nanoscale, it is difficult to analyze the reinforcement mechanisms experimentally. Graphene/Ni composite coatings of different thicknesses during nanoindentation are studied by molecular dynamics. Hardness and reduced Young's modulus are determined from the load/unload curves obtained from indenter displacement simulation. The results show that with the increase of the coating thickness hardness of the Ni substrate increases. A composite coating with a higher initial thickness has a higher resistance to indentation and can withstand high loads. Such a composite coating can be an effective protective coating against damage. For the coating thickness less than 2 nm, deformation strengthening occurred due to the dislocation activity in Ni. For greater thickness of the composite coating, strengthening occurred due to the rearrangement of the graphene network. At a composite coating thickness of 5.1 nm, the hardness of the Ni surface increases more than three times compared to Ni single crystal. The obtained results can provide a fundamental understanding for the application of graphene/Ni composite coatings and reveal the strengthening mechanisms under indentation based on nucleation and interaction of defects.

{"title":"The impact of composite graphene/Ni coating on nanoindentation of Ni: Deformation mechanism","authors":"Karina A. Krylova , Liliya R. Safina , Yury V. Rusalev , Julia A. Baimova","doi":"10.1016/j.surfin.2025.106093","DOIUrl":"10.1016/j.surfin.2025.106093","url":null,"abstract":"<div><div>To improve the corrosion and wear resistance of the nickel surface, a protective graphene-based composite coating can be used. Electrodeposition can be used to cover the different metal surfaces with the composite nanocoatings for future application in various industries. Due to the structural transition that occurs at the nanoscale, it is difficult to analyze the reinforcement mechanisms experimentally. Graphene/Ni composite coatings of different thicknesses during nanoindentation are studied by molecular dynamics. Hardness and reduced Young's modulus are determined from the load/unload curves obtained from indenter displacement simulation. The results show that with the increase of the coating thickness hardness of the Ni substrate increases. A composite coating with a higher initial thickness has a higher resistance to indentation and can withstand high loads. Such a composite coating can be an effective protective coating against damage. For the coating thickness less than 2 nm, deformation strengthening occurred due to the dislocation activity in Ni. For greater thickness of the composite coating, strengthening occurred due to the rearrangement of the graphene network. At a composite coating thickness of 5.1 nm, the hardness of the Ni surface increases more than three times compared to Ni single crystal. The obtained results can provide a fundamental understanding for the application of graphene/Ni composite coatings and reveal the strengthening mechanisms under indentation based on nucleation and interaction of defects.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":"61 ","pages":"Article 106093"},"PeriodicalIF":5.7,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143520932","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}

引用次数: 0