Materials Chemistry and Physics最新文献

英文中文

Assessment of silver modification's impact on the internal structure stability, phase and textural properties of fly ash-derived X and A zeolites

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics

Pub Date : 2025-03-17 DOI: 10.1016/j.matchemphys.2025.130730

Piotr Kunecki , Ewa Wisła-Walsh , Kamil Kornaus , Paweł Gara , Magdalena Wdowin

Zeolites X and A able to bind elemental mercury were synthesized via a hybrid method. The procedure involved melting fly ash with sodium hydroxide, followed by simultaneous activation and crystallization of zeolites during the hydrothermal synthesis stage. The influence of silver modification on the phase composition and textural properties of zeolites X and A was systematically investigated. The applied method resulted in the formation of highly crystalline zeolite X coexisting with residual quartz and mullite, as well as mono-mineral zeolite A. Compared to unmodified zeolites and those modified with lower doses of the activating agent, a higher dose of silver nitrate slightly reduced the degree of crystallinity of the synthesized zeolites. Zeolites X and A exhibited significant differences in their specific surface areas. Although zeolites X displayed surface area values approximately six times higher than those of zeolites A, both types demonstrated comparable efficiency in elemental mercury sorption. Results from mercury removal experiments suggest that silver ions, after occupying narrower micropores, facilitate the formation of mesoporous layers when no additional micropore surfaces are available. Consequently, mercury removal occurs within mesopores via amalgamation with silver deposited on their surfaces.

{"title":"Assessment of silver modification's impact on the internal structure stability, phase and textural properties of fly ash-derived X and A zeolites","authors":"Piotr Kunecki , Ewa Wisła-Walsh , Kamil Kornaus , Paweł Gara , Magdalena Wdowin","doi":"10.1016/j.matchemphys.2025.130730","DOIUrl":"10.1016/j.matchemphys.2025.130730","url":null,"abstract":"<div><div>Zeolites X and A able to bind elemental mercury were synthesized via a hybrid method. The procedure involved melting fly ash with sodium hydroxide, followed by simultaneous activation and crystallization of zeolites during the hydrothermal synthesis stage. The influence of silver modification on the phase composition and textural properties of zeolites X and A was systematically investigated. The applied method resulted in the formation of highly crystalline zeolite X coexisting with residual quartz and mullite, as well as mono-mineral zeolite A. Compared to unmodified zeolites and those modified with lower doses of the activating agent, a higher dose of silver nitrate slightly reduced the degree of crystallinity of the synthesized zeolites. Zeolites X and A exhibited significant differences in their specific surface areas. Although zeolites X displayed surface area values approximately six times higher than those of zeolites A, both types demonstrated comparable efficiency in elemental mercury sorption. Results from mercury removal experiments suggest that silver ions, after occupying narrower micropores, facilitate the formation of mesoporous layers when no additional micropore surfaces are available. Consequently, mercury removal occurs within mesopores via amalgamation with silver deposited on their surfaces.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"339 ","pages":"Article 130730"},"PeriodicalIF":4.3,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143637228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Montmorillonite-supported Cu-tripeptide complex for efficient Congo red degradation

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics

Pub Date : 2025-03-17 DOI: 10.1016/j.matchemphys.2025.130640

Mounir Mekidiche , Khadidja Khaldi , Djahida Lerari-Zinai , Khaldoun Bachari

Novel hybrid materials were synthesized by immobilizing copper-triglycine (GGG-Cu) and copper-glycine-glycine-histidine (GGH-Cu) complexes onto 3-(aminopropyl)triethoxysilane (APTES)-modified montmorillonite K10 (K10–NH). Characterization confirmed successful grafting of APTES and immobilization of the complexes. Band gap analysis revealed that the incorporation of copper complexes influenced the electronic properties of the materials. The prepared hybrid materials demonstrated superior catalytic activity in both Fenton-like and photocatalytic degradation of Congo red dye, achieving degradation rates of up to 96 % and 90 %, respectively. The catalyst with the GGH-Cu complex exhibited better reusability over multiple cycles. These findings highlight the potential of these eco-friendly hybrid materials for efficient and sustainable water treatment.

引用次数: 0

The measurement and improvement of tensile strength in cold-sintered zinc oxide

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics

Pub Date : 2025-03-17 DOI: 10.1016/j.matchemphys.2025.130753

Kaveh Rahimi Mamaghani, Nader Parvin

The cold sintering process (CSP) is a low-temperature densification technique for fabricating high-density ceramics, including zinc oxide (ZnO). Optimizing mechanical properties remains challenging due to weak grain boundaries leading to intergranular fracture. This study examines the effects of ZnO particle shapes and organic solvents on densification and tensile strength. ZnO powders with rod-like and isometric morphologies were cold-sintered at 250 °C and 530 MPa for 45 min using water, dimethylformamide (DMF), dimethyl sulfoxide (DMSO), and N-methyl-2-pyrrolidone (NMP) mixed with 2 M acetic acid. Characterization techniques included SEM, BET, XRD, and UV–Vis spectroscopy. The isometric ZnO achieved a higher relative density (97.8 %) than rod-like ZnO (96.5 %) due to better packing. Among solvents, water yielded the highest density, while DMF resulted in the lowest. Despite polarity significantly impacting densification, solvent viscosity, flashpoint, and pH had negligible effects. Weibull analysis on Brazilian test data estimated the tensile strength of the densest ZnO at 23.9 MPa, with fractography confirming intergranular fracture. Fracture toughness, calculated via the Haberfield and Johnston equation, was 2.5 MPa m^0.5. The addition of MoS₂ nanoparticles (up to 1 wt%) slightly improved tensile strength (<3 %), while substituting 2 M formic acid for acetic acid led to a 21 % enhancement, emphasizing grain boundary reinforcement. These findings highlight the crucial role of solvent chemistry in improving sintering efficiency and mechanical integrity, suggesting future research should focus on optimizing solvent compositions for enhanced performance.

{"title":"The measurement and improvement of tensile strength in cold-sintered zinc oxide","authors":"Kaveh Rahimi Mamaghani, Nader Parvin","doi":"10.1016/j.matchemphys.2025.130753","DOIUrl":"10.1016/j.matchemphys.2025.130753","url":null,"abstract":"<div><div>The cold sintering process (CSP) is a low-temperature densification technique for fabricating high-density ceramics, including zinc oxide (ZnO). Optimizing mechanical properties remains challenging due to weak grain boundaries leading to intergranular fracture. This study examines the effects of ZnO particle shapes and organic solvents on densification and tensile strength. ZnO powders with rod-like and isometric morphologies were cold-sintered at 250 °C and 530 MPa for 45 min using water, dimethylformamide (DMF), dimethyl sulfoxide (DMSO), and N-methyl-2-pyrrolidone (NMP) mixed with 2 M acetic acid. Characterization techniques included SEM, BET, XRD, and UV–Vis spectroscopy. The isometric ZnO achieved a higher relative density (97.8 %) than rod-like ZnO (96.5 %) due to better packing. Among solvents, water yielded the highest density, while DMF resulted in the lowest. Despite polarity significantly impacting densification, solvent viscosity, flashpoint, and pH had negligible effects. Weibull analysis on Brazilian test data estimated the tensile strength of the densest ZnO at 23.9 MPa, with fractography confirming intergranular fracture. Fracture toughness, calculated via the Haberfield and Johnston equation, was 2.5 MPa m<sup>0.5</sup>. The addition of MoS<sub>2</sub> nanoparticles (up to 1 wt%) slightly improved tensile strength (<3 %), while substituting 2 M formic acid for acetic acid led to a 21 % enhancement, emphasizing grain boundary reinforcement. These findings highlight the crucial role of solvent chemistry in improving sintering efficiency and mechanical integrity, suggesting future research should focus on optimizing solvent compositions for enhanced performance.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"339 ","pages":"Article 130753"},"PeriodicalIF":4.3,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143644123","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}

引用次数: 0

Rapid immobilization of Ag/ZnO nanocomposite on Kanthal mesh for efficient removal of organic dye and heavy metal ions

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics

Pub Date : 2025-03-15 DOI: 10.1016/j.matchemphys.2025.130692

Anh Thi Le , Chee-Meng Koe , Thi Duy Hanh Le , Wai Kian Tan , Nguyen Anh Tuan Huynh , Swee-Yong Pung

This study presents a novel, scalable photocatalytic system for water treatment, developed by rapidly immobilizing Ag/ZnO nanostructures onto a Kanthal mesh support. The Ag/ZnO/mesh nanocomposite was synthesized via a combined direct heating and photoreduction method, exhibiting high ZnO crystallinity and uniform Ag nanoparticle deposition (10.6 ± 2.3 nm). Remarkably, this immobilized photocatalyst achieved 92.4 % degradation of 2 ppm Rhodamine B (RhB) and maintained 90 % efficiency after five reuse cycles, demonstrating exceptional stability even at RhB concentrations up to 10 ppm. Furthermore, the composite exhibited approximately 80 % removal efficiency for Pb²⁺ ions, achieved through adsorption, and facilitated the photocatalytic reduction of Cu²⁺ ions. This superior performance is attributed to the synergistic effects of Ag coupling, enhancing light absorption and charge separation, and the high surface area of the Kanthal mesh. This work lays a foundation for scalable production of immobilized photocatalytic materials on supportive substrates, paving the way for their implementation in tertiary wastewater treatment.

{"title":"Rapid immobilization of Ag/ZnO nanocomposite on Kanthal mesh for efficient removal of organic dye and heavy metal ions","authors":"Anh Thi Le , Chee-Meng Koe , Thi Duy Hanh Le , Wai Kian Tan , Nguyen Anh Tuan Huynh , Swee-Yong Pung","doi":"10.1016/j.matchemphys.2025.130692","DOIUrl":"10.1016/j.matchemphys.2025.130692","url":null,"abstract":"<div><div>This study presents a novel, scalable photocatalytic system for water treatment, developed by rapidly immobilizing Ag/ZnO nanostructures onto a Kanthal mesh support. The Ag/ZnO/mesh nanocomposite was synthesized via a combined direct heating and photoreduction method, exhibiting high ZnO crystallinity and uniform Ag nanoparticle deposition (10.6 ± 2.3 nm). Remarkably, this immobilized photocatalyst achieved 92.4 % degradation of 2 ppm Rhodamine B (RhB) and maintained 90 % efficiency after five reuse cycles, demonstrating exceptional stability even at RhB concentrations up to 10 ppm. Furthermore, the composite exhibited approximately 80 % removal efficiency for Pb<sup>2+</sup> ions, achieved through adsorption, and facilitated the photocatalytic reduction of Cu<sup>2+</sup> ions. This superior performance is attributed to the synergistic effects of Ag coupling, enhancing light absorption and charge separation, and the high surface area of the Kanthal mesh. This work lays a foundation for scalable production of immobilized photocatalytic materials on supportive substrates, paving the way for their implementation in tertiary wastewater treatment.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"339 ","pages":"Article 130692"},"PeriodicalIF":4.3,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143628503","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}

引用次数: 0

Electrochemical voltammetry quantification of dopamine based on ceria-doped ZnAl2O4

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics

Pub Date : 2025-03-15 DOI: 10.1016/j.matchemphys.2025.130704

Nandini Robin Nadar , J. Deepak , S.C. Sharma , B.R. Radha Krushna , Suresh Babu K , Swati Mishra , D. Veera Vanitha , I.S. Pruthviraj , H. Nagabhushana

Due to the growing prevalence of stress-related disorders such as depression, the need for reliable detection methods for neurotransmitters like dopamine, which play a crucial role in mood regulation, has become increasingly important. In this study, the novelty of this work lies in the first-time integration of ceria-doped ZnAl₂O₄ (CZAO) nanoparticles for dual electrochemical applications like dopamine sensing and possible supercapacitor performance. The modified carbon paste electrode (MCPE) incorporated with CZAO exhibited superior electrochemical properties, showing a significant increase in anodic peak current (5.29 μA) compared to the bare electrode (3.6 μA), indicating enhanced DA detection. Optimal DA analysis was achieved at a pH of 7.0, with a linear regression value of 0.9958. The limit of detection (LOD) and limit of quantification (LOQ) were determined to be 0.5137 μM and 1.712 μM. The modified electrode demonstrated impressive stability, maintaining 87 % activity over 20 cycles. Furthermore, the CZAO NPs showed an outstanding specific capacitance of 1444 F/g at a scan rate of 2 mV/s, highlighting their potential for energy storage in supercapacitors. This work emphasizes the excellent electrochemical performance of CZAO NPs, both in enhancing neurotransmitter detection sensitivity and in providing high-capacitance energy storage.

{"title":"Electrochemical voltammetry quantification of dopamine based on ceria-doped ZnAl2O4","authors":"Nandini Robin Nadar , J. Deepak , S.C. Sharma , B.R. Radha Krushna , Suresh Babu K , Swati Mishra , D. Veera Vanitha , I.S. Pruthviraj , H. Nagabhushana","doi":"10.1016/j.matchemphys.2025.130704","DOIUrl":"10.1016/j.matchemphys.2025.130704","url":null,"abstract":"<div><div>Due to the growing prevalence of stress-related disorders such as depression, the need for reliable detection methods for neurotransmitters like dopamine, which play a crucial role in mood regulation, has become increasingly important. In this study, the novelty of this work lies in the first-time integration of ceria-doped ZnAl<sub>2</sub>O<sub>4</sub> (CZAO) nanoparticles for dual electrochemical applications like dopamine sensing and possible supercapacitor performance. The modified carbon paste electrode (MCPE) incorporated with CZAO exhibited superior electrochemical properties, showing a significant increase in anodic peak current (5.29 μA) compared to the bare electrode (3.6 μA), indicating enhanced DA detection. Optimal DA analysis was achieved at a pH of 7.0, with a linear regression value of 0.9958. The limit of detection (LOD) and limit of quantification (LOQ) were determined to be 0.5137 μM and 1.712 μM. The modified electrode demonstrated impressive stability, maintaining 87 % activity over 20 cycles. Furthermore, the CZAO NPs showed an outstanding specific capacitance of 1444 F/g at a scan rate of 2 mV/s, highlighting their potential for energy storage in supercapacitors. This work emphasizes the excellent electrochemical performance of CZAO NPs, both in enhancing neurotransmitter detection sensitivity and in providing high-capacitance energy storage.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"339 ","pages":"Article 130704"},"PeriodicalIF":4.3,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143644125","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}

引用次数: 0

Immobilization of gold nanoparticles on electrospun polyacrylonitrile/carbon nanotube nanofiber for self-powered electrochemical biosensing of myoglobin

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics

Pub Date : 2025-03-14 DOI: 10.1016/j.matchemphys.2025.130722

Mingye Zhao , Ling Wang , Hui Xu

Polyacrylonitrile-carbon nanotube (PAN-CNT) nanofibers were prepared on indium tin oxide (ITO) electrode using electrospinning technique, and gold nanoparticles (AuNPs) were subsequently modified on ITO-PAN-CNT electrode by electrostatic adsorption to construct ITO-PAN-CNT–COOH–AuNPs substrate electrode. The self-powered biosensor consists of a PAN-CNT–COOH–AuNPs-aptamer functionalized biocathode and a PAN-CNT–COOH–AuNPs-glucose oxidase (GO_x) bioanode. By capturing the change in electrode spatial potential resistance before and after myoglobin (Mb), This interaction affects the transmission of electrons between the redox probe [Fe(CN)₆]^3- an d the biocathode, establishing a linear relationship between E^OCV and Mb concentration. The self-powered biosensor displayed a highly sensitive response to the target Mb over a concentration range from 5 to 5 × 10³ ng mL⁻¹, with a limit of detection reaching less than 0.23 ng mL⁻¹ (S/N = 3), and exhibited outstanding stability and selectivity.

{"title":"Immobilization of gold nanoparticles on electrospun polyacrylonitrile/carbon nanotube nanofiber for self-powered electrochemical biosensing of myoglobin","authors":"Mingye Zhao , Ling Wang , Hui Xu","doi":"10.1016/j.matchemphys.2025.130722","DOIUrl":"10.1016/j.matchemphys.2025.130722","url":null,"abstract":"<div><div>Polyacrylonitrile-carbon nanotube (PAN-CNT) nanofibers were prepared on indium tin oxide (ITO) electrode using electrospinning technique, and gold nanoparticles (AuNPs) were subsequently modified on ITO-PAN-CNT electrode by electrostatic adsorption to construct ITO-PAN-CNT–COOH–AuNPs substrate electrode. The self-powered biosensor consists of a PAN-CNT–COOH–AuNPs-aptamer functionalized biocathode and a PAN-CNT–COOH–AuNPs-glucose oxidase (GO<sub>x</sub>) bioanode. By capturing the change in electrode spatial potential resistance before and after myoglobin (Mb), This interaction affects the transmission of electrons between the redox probe [Fe(CN)<sub>6</sub>]<sup>3-</sup> an d the biocathode, establishing a linear relationship between E<sup>OCV</sup> and Mb concentration. The self-powered biosensor displayed a highly sensitive response to the target Mb over a concentration range from 5 to 5 × 10<sup>3</sup> ng mL<sup>−1</sup>, with a limit of detection reaching less than 0.23 ng mL<sup>−1</sup> (S/N = 3), and exhibited outstanding stability and selectivity.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"339 ","pages":"Article 130722"},"PeriodicalIF":4.3,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143644000","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}

引用次数: 0

Evaluation of the bone-enhancing potential of calcium phosphate coatings with different morphologies on titanium surfaces under oxidative stress conditions

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics

Pub Date : 2025-03-13 DOI: 10.1016/j.matchemphys.2025.130703

Keyuan Xu , Jia Chen , Hongyu Luo , Shuangyun Liu , Shaobo Ni , Xinkun Shen , Yilong Dong , Xiaoyi Pan

Calcium phosphate (CaP) coatings with varying morphologies were applied to the surface of titanium using an immersion method, and their anti-inflammatory and bone-enhancing properties were examined under oxidative stress (OS) conditions. The experimental results demonstrated that hydroxyapatite-treated titanium exhibits superior antioxidant capabilities compared to pure titanium. This improvement supports cell attachment, growth, and osteogenic differentiation of MC3T3-E1 cells by efficiently modulating the bone immune microenvironment. Meanwhile, the CaP coatings formed under different pH conditions show significant differences, with Ti–HAs demonstrating superior performance compared to Ti-HAp, especially under OS conditions.

研究人员采用浸泡法将不同形态的磷酸钙（CaP）涂层涂覆到钛的表面，并在氧化应激（OS）条件下考察了其抗炎和增强骨质的特性。实验结果表明，与纯钛相比，羟基磷灰石处理过的钛具有更强的抗氧化能力。这种改善通过有效调节骨免疫微环境，支持 MC3T3-E1 细胞的附着、生长和成骨分化。同时，在不同 pH 值条件下形成的 CaP 涂层显示出显著差异，与 Ti-HAp 相比，Ti-HAs 表现出更优越的性能，尤其是在 OS 条件下。

引用次数: 0

Enhancing moist-heat resistance of cesium-doped tungsten bronze nanoparticles via ultrathin silica coating: A sol-gel approach for optimized near-infrared absorption

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics

Pub Date : 2025-03-13 DOI: 10.1016/j.matchemphys.2025.130715

Mizuki Ito , Keisuke Machida , Shuhei Nakakura , Masato Yanase , Yoshio Kobayashi

Near-infrared (NIR) absorbing materials are widely used to enhance energy efficiency in window applications. Cesium-doped tungsten bronze (CsWO) nanoparticles, known for their strong NIR absorption, comprise metal oxides with tungsten having a reduced oxidation state (W⁵⁺) and intercalated Cs⁺. However, in humid environments, CsWO nanoparticles are susceptible to degradation due to the oxidation of W⁵⁺ and elution of Cs⁺, leading to decolorization and diminished NIR absorption. This study presents a simple and effective method for enhancing the stability of CsWO nanoparticles by coating them with ultrathin silica layers (CsWO/SiO₂). The silica coating, applied via a sol-gel process, is optimized by controlling the concentrations of silicon alkoxide, base catalyst, water, and CsWO nanoparticles. The thickness of the silica layer, which can be precisely tuned at the nanoscale, depends on the reaction temperature. Notably, the single-nanometer-scale silica shell minimally affects the optical absorption properties of CsWO/SiO₂ while mitigating light scattering associated with increased particle size. A 5 nm-thick silica shell significantly improves the resistance of CsWO nanoparticles to moist-heat conditions compared to uncoated CsWO. Furthermore, the degradation mechanism of CsWO/SiO₂ under humid conditions is elucidated, highlighting the role of Cs⁺ elution and silica dissolution in the stability of coated nanoparticles.

{"title":"Enhancing moist-heat resistance of cesium-doped tungsten bronze nanoparticles via ultrathin silica coating: A sol-gel approach for optimized near-infrared absorption","authors":"Mizuki Ito , Keisuke Machida , Shuhei Nakakura , Masato Yanase , Yoshio Kobayashi","doi":"10.1016/j.matchemphys.2025.130715","DOIUrl":"10.1016/j.matchemphys.2025.130715","url":null,"abstract":"<div><div>Near-infrared (NIR) absorbing materials are widely used to enhance energy efficiency in window applications. Cesium-doped tungsten bronze (CsWO) nanoparticles, known for their strong NIR absorption, comprise metal oxides with tungsten having a reduced oxidation state (W<sup>5+</sup>) and intercalated Cs<sup>+</sup>. However, in humid environments, CsWO nanoparticles are susceptible to degradation due to the oxidation of W<sup>5+</sup> and elution of Cs<sup>+</sup>, leading to decolorization and diminished NIR absorption. This study presents a simple and effective method for enhancing the stability of CsWO nanoparticles by coating them with ultrathin silica layers (CsWO/SiO<sub>2</sub>). The silica coating, applied via a sol-gel process, is optimized by controlling the concentrations of silicon alkoxide, base catalyst, water, and CsWO nanoparticles. The thickness of the silica layer, which can be precisely tuned at the nanoscale, depends on the reaction temperature. Notably, the single-nanometer-scale silica shell minimally affects the optical absorption properties of CsWO/SiO<sub>2</sub> while mitigating light scattering associated with increased particle size. A 5 nm-thick silica shell significantly improves the resistance of CsWO nanoparticles to moist-heat conditions compared to uncoated CsWO. Furthermore, the degradation mechanism of CsWO/SiO<sub>2</sub> under humid conditions is elucidated, highlighting the role of Cs<sup>+</sup> elution and silica dissolution in the stability of coated nanoparticles.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"339 ","pages":"Article 130715"},"PeriodicalIF":4.3,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143644126","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}

引用次数: 0

Copper-neodymium coordination networks: An electrochemical approach for efficacious caffeine detection in beverages

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics

Pub Date : 2025-03-13 DOI: 10.1016/j.matchemphys.2025.130708

Jeevanantham Arumugam, Ganesan Shanmugam, Monisha Venkatesan, Sachin Sreedhar

A novel copper neodymium octahedral shaped metal organic frameworks (Cu–Nd MOFs) was used to modify glassy carbon electrode (GCE) for caffeine (CAF) detection in commercial beverages (0.1–1.5 μM) with notable low detection limit (LOD) of 0.098 μM, and a limit of quantification (LOQ) of 0.327 μM. This enhanced sensitivity was attributed to the redox reaction of Cu (Cu²⁺ → Cu⁺) and Nd (Nd³⁺ → Nd²⁺) ions present within the framework structure. An exceptional reproducibility (RSD = 2.16 %), stability (RSD = 2.48 %), and selectivity of Cu–Nd MOFs/GCE towards CAF makes it as a promising electrochemical sensor material. Moreover, Cu–Nd MOFs has large electroactive surface area, superior mass transport, efficient ionic conductivity, synergistic effects, and chemical stability making it a potential material to be implemented in sensor devices to detect the minimal presence of CAF. Overall, Cu–Nd MOFs/GCE shows a significant potential for real-time applications for efficacious sensing of CAF in various food products.

{"title":"Copper-neodymium coordination networks: An electrochemical approach for efficacious caffeine detection in beverages","authors":"Jeevanantham Arumugam, Ganesan Shanmugam, Monisha Venkatesan, Sachin Sreedhar","doi":"10.1016/j.matchemphys.2025.130708","DOIUrl":"10.1016/j.matchemphys.2025.130708","url":null,"abstract":"<div><div>A novel copper neodymium octahedral shaped metal organic frameworks (Cu–Nd MOFs) was used to modify glassy carbon electrode (GCE) for caffeine (CAF) detection in commercial beverages (0.1–1.5 μM) with notable low detection limit (LOD) of 0.098 μM, and a limit of quantification (LOQ) of 0.327 μM. This enhanced sensitivity was attributed to the redox reaction of Cu (Cu<sup>2+</sup> → Cu<sup>+</sup>) and Nd (Nd<sup>3+</sup> → Nd<sup>2+</sup>) ions present within the framework structure. An exceptional reproducibility (RSD = 2.16 %), stability (RSD = 2.48 %), and selectivity of Cu–Nd MOFs/GCE towards CAF makes it as a promising electrochemical sensor material. Moreover, Cu–Nd MOFs has large electroactive surface area, superior mass transport, efficient ionic conductivity, synergistic effects, and chemical stability making it a potential material to be implemented in sensor devices to detect the minimal presence of CAF. Overall, Cu–Nd MOFs/GCE shows a significant potential for real-time applications for efficacious sensing of CAF in various food products.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"339 ","pages":"Article 130708"},"PeriodicalIF":4.3,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143628504","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}

引用次数: 0

Development of conductive fractal copper–polypyrrole nanocomposites for dual corrosion inhibition and ammonia detection in metallic food containers

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics

Pub Date : 2025-03-13 DOI: 10.1016/j.matchemphys.2025.130696

Abdelqader El Guerraf , Sana Ben Jadi , Meriyem Mouloudi , Mostafa Chhiba , Mohamed Essahli , Mohammed Bazzaoui , El Arbi Bazzaoui

In the present study, we present the development and characterization of a polypyrrole (PPy)-based nanocomposite embedded with fractal copper (Cu) crystals, engineered to provide enhanced corrosion resistance and ammonia-sensing capability for metallic food packaging. The nanocomposite coatings were prepared by electrodeposition on industrial tinplate electrodes in oxalic acid (PPy@OxAc) and sodium salicylate (PPy@NaSa) media. Structural analyses via SEM and AFM revealed distinct morphologies with copper crystallization forming leaf-like fractal structures, promoting high surface roughness and contact angles (96° for PPy@OxAc and 93° for PPy@NaSa), indicating hydrophobicity advantageous for corrosion resistance. Corrosion performance, evaluated through open circuit potential (OCP), electrochemical impedance spectroscopy (EIS), and potentiodynamic polarization in a 3 % NaCl solution, demonstrated an over 95 % inhibition efficiency. This was evidenced by a significant decrease in corrosion current density from 2.238 μA/cm² to 0.083 μA/cm² over immersion times up to 144 h. Ammonia exposure tests highlighted a significant and reversible increase in resistance upon NH₃ exposure, linked to electron or proton transfer mechanisms in the PPy matrix. These results support the dual function of Cu–PPy nanocomposites in providing prolonged corrosion protection and real-time detection of spoilage indicators, marking a substantial step toward sustainable and intelligent food packaging solutions.

{"title":"Development of conductive fractal copper–polypyrrole nanocomposites for dual corrosion inhibition and ammonia detection in metallic food containers","authors":"Abdelqader El Guerraf , Sana Ben Jadi , Meriyem Mouloudi , Mostafa Chhiba , Mohamed Essahli , Mohammed Bazzaoui , El Arbi Bazzaoui","doi":"10.1016/j.matchemphys.2025.130696","DOIUrl":"10.1016/j.matchemphys.2025.130696","url":null,"abstract":"<div><div>In the present study, we present the development and characterization of a polypyrrole (PPy)-based nanocomposite embedded with fractal copper (Cu) crystals, engineered to provide enhanced corrosion resistance and ammonia-sensing capability for metallic food packaging. The nanocomposite coatings were prepared by electrodeposition on industrial tinplate electrodes in oxalic acid (PPy@OxAc) and sodium salicylate (PPy@NaSa) media. Structural analyses via SEM and AFM revealed distinct morphologies with copper crystallization forming leaf-like fractal structures, promoting high surface roughness and contact angles (96° for PPy@OxAc and 93° for PPy@NaSa), indicating hydrophobicity advantageous for corrosion resistance. Corrosion performance, evaluated through open circuit potential (OCP), electrochemical impedance spectroscopy (EIS), and potentiodynamic polarization in a 3 % NaCl solution, demonstrated an over 95 % inhibition efficiency. This was evidenced by a significant decrease in corrosion current density from 2.238 μA/cm<sup>2</sup> to 0.083 μA/cm<sup>2</sup> over immersion times up to 144 h. Ammonia exposure tests highlighted a significant and reversible increase in resistance upon NH<sub>3</sub> exposure, linked to electron or proton transfer mechanisms in the PPy matrix. These results support the dual function of Cu–PPy nanocomposites in providing prolonged corrosion protection and real-time detection of spoilage indicators, marking a substantial step toward sustainable and intelligent food packaging solutions.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"339 ","pages":"Article 130696"},"PeriodicalIF":4.3,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143628508","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}

引用次数: 0

下一页尾页

类型

全部化学•材料生命科学医学物理工程技术环境•农林材料科学地球科学法学管理学化学环境科学与生态学计算机科学教育学经济学农林科学人文科学生物学数学物理与天体物理心理学综合性期刊其他工业工程理学历史学农学文学信息工程

数据库

全部 ACS Publications Elsevier ieeexplore Springer The Royal Society of Chemistry Wiley

期刊

Materials Chemistry and Physics

全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.

﹀