ChemNanoMat最新文献_第3页

Gold Nanoparticles Supported on Modified Chitosan Oligomers: Stability and Catalytic Performance 改性壳聚糖低聚物负载的金纳米颗粒：稳定性和催化性能

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2025-07-15 DOI: 10.1002/cnma.202500246

Luis F. Pedroza Garcia, N. Mariano Correa, Fernando Moyano, Gustavo F. Silbestri

{"title":"Gold Nanoparticles Supported on Modified Chitosan Oligomers: Stability and Catalytic Performance","authors":"Luis F. Pedroza Garcia, N. Mariano Correa, Fernando Moyano, Gustavo F. Silbestri","doi":"10.1002/cnma.202500246","DOIUrl":"https://doi.org/10.1002/cnma.202500246","url":null,"abstract":"This study investigates the synthesis and stabilization of gold nanoparticles (Au-NPs) ≈20 nm in diameter, using modified chitooligosaccharide (COS) as a biopolymeric matrix, emphasizing their application in catalysis. The modified COS serves as a stabilizing agent for the Au-NPs, enhancing their catalytic efficiency and the recovery of the catalyst. Structural characterization techniques, including UV-vis spectroscopy, Fourier-transform infrared spectroscopy, and transmission electron microscopy, are employed to analyze the polymeric matrices and confirm the successful integration of Au-NPs. The higher stability of Au-NPs in P2 is attributed to the rigid imidazole rings, which form a more ordered network than the flexible diimine bonds in P1. The catalytic performance of the Au-NPs on modified COS is evaluated in the isomerization reaction of sulfamethazine-azo-aniline, achieving up to 73% efficiency in the third cycle of reuse. This research highlights the promising role of biopolymer-based catalysts in advancing sustainable and efficient organic synthesis.","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 10","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145196809","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Graphene Quantum Dots-Decorated 2D CuInP2S6 Nanosheets with Specially Enhanced Heterojunction-Associated Photocatalytic Activity for High-Performance Water Decontamination 石墨烯量子点修饰的二维CuInP2S6纳米片具有特殊增强的异质结相关光催化活性，用于高性能水净化

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2025-07-14 DOI: 10.1002/cnma.202500162

Xiaoliang Yuan, Shaowei Ho, Canwen Wang, Yuhua Yang, Jiling Li, Pu Liu, Yangyi Yang

{"title":"Graphene Quantum Dots-Decorated 2D CuInP2S6 Nanosheets with Specially Enhanced Heterojunction-Associated Photocatalytic Activity for High-Performance Water Decontamination","authors":"Xiaoliang Yuan, Shaowei Ho, Canwen Wang, Yuhua Yang, Jiling Li, Pu Liu, Yangyi Yang","doi":"10.1002/cnma.202500162","DOIUrl":"https://doi.org/10.1002/cnma.202500162","url":null,"abstract":"The significant environmental challenges of dye-contaminated wastewater necessitate efficient photocatalyst for pollutant degradation. Herein, a novel graphene quantum dots (GQDs) modified CuInP2S6 composite (GQDs@CuInP2S6) with a type-II band alignment has been successfully synthesized via laser liquid phase melting technology. Under visible light, GQDs@CuInP2S6 achieves 98.3% degradation of Rhodamine B (RhB) within 8 min, exhibiting a kinetic rate constant 2–3 orders of magnitude higher than pristine CuInP2S6. Density functional theory calculations reveal this enhancement stems from unique electronic modulation of CuInP2S6 by GQDs. Notably, irrespective of van der Waals or covalent GQDs-CuInP2S6 interactions, the composite transitions from pristine CuInP2S6's a indirect bandgap to a direct bandgap, with chemisorbed GQDs further narrowing the gap, which facilitates electron transition and broadens light absorption spectrum. Additionally, the band alignment and partial charge density confirm a type-II heterojunction in chemisorbed GQDs@CuInP2S6. Holes from GQDs@CuInP2S6 and electrons from CuInP2S6 generate an internal electric field, suppressing charge carrier recombination and significantly enhancing photocatalytic performance. This work pioneers a synthesis approach for quantum dot-decorated surface composite and theoretically elucidates the quantum dot modification mechanisms, advancing a new innovative photocatalytic material design.","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 10","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145196760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Synergistic Tribological Enhancement in Water-Based Lubricants with Sodium Dodecylbenzenesulfonate-Modified Reduced Graphene Oxide 十二烷基苯磺酸钠改性还原氧化石墨烯在水基润滑剂中的协同摩擦学增强作用

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2025-07-14 DOI: 10.1002/cnma.202500208

Xiaoming Cai, Puteng Gui, Xiuyu Zhang, Zhangyong Wu, Wei Long, Jinming Cai

{"title":"Synergistic Tribological Enhancement in Water-Based Lubricants with Sodium Dodecylbenzenesulfonate-Modified Reduced Graphene Oxide","authors":"Xiaoming Cai, Puteng Gui, Xiuyu Zhang, Zhangyong Wu, Wei Long, Jinming Cai","doi":"10.1002/cnma.202500208","DOIUrl":"10.1002/cnma.202500208","url":null,"abstract":"The extent of reduction in reduced graphene oxide (RGO) significantly affects its performance as a water-based lubricant additive. In this study, sodium dodecylbenzenesulfonate (SDBS)-modified RGO nanofluids with controlled degrees of reduction through a simple, low-temperature, water-bath reduction process are synthesized. This is achieved by varying the mass ratio of L-ascorbic acid (LAA) to graphene oxide (GO). The RGO-SDBS(V) sample, prepared at a 5:1 LAA-to-GO mass ratio, demonstrates an optimized lamellar structure and colloidal stability, with no sedimentation observed over 21 days. Tribological tests using a ball-on-disc tribometer demonstrate that incorporating 0.1 wt% RGO-SDBS(V) into pure water reduces the friction coefficient and wear rate by 78.8% and 88.9%, respectively. Surface analysis confirms the effective deposition of RGO-SDBS(V) and the formation of protective Fe2O3/SiO2 tribofilms. The superior lubrication performance is attributed to the synergy between the intrinsic lubricity of RGO-SDBS(V) and friction-induced chemical reactions, as evidenced by X-ray photoelectron spectroscopy and Raman spectroscopy. These findings underscore the potential of SDBS-functionalized RGO in high-performance, water-based lubrication systems.","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 9","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145101344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Silver-Paper/Poly(vinyl Alcohol) Catalyst: Dip and Flow Mode Deployment with Plasmon Activation 银纸/聚（乙烯醇）催化剂：浸和流动模式部署与等离子体激活

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2025-07-14 DOI: 10.1002/cnma.202500212

Anu Bovas, Neelakshi Sengupta, T. P. Radhakrishnan

{"title":"Silver-Paper/Poly(vinyl Alcohol) Catalyst: Dip and Flow Mode Deployment with Plasmon Activation","authors":"Anu Bovas, Neelakshi Sengupta, T. P. Radhakrishnan","doi":"10.1002/cnma.202500212","DOIUrl":"https://doi.org/10.1002/cnma.202500212","url":null,"abstract":"A facile in situ method is developed to fabricate a metal-paper/polymer nanocomposite to leverage the advantages of homogeneous and heterogeneous catalysis. Silver nanoparticle-filter paper/poly(vinyl alcohol) (Ag-FP/PVA) nanocomposite system is deployed for the efficient catalytic degradation of methylene blue (MB), a toxic synthetic dye, in aqueous medium. Ag-FP/PVA acts as a dip catalyst for the reaction with high stability and recyclability. Even without the addition of any external reducing agent like borohydride, the nanocomposite paper provided a TOF of 1.85 × 1017 molecules g−1 s−1. The Ag-FP/PVA catalyst is also deployed in a flow mode, enabling the degradation of MB with an enhanced TOF of 2.32 × 1017 molecules g−1 s−1 with a flow rate of 8.5 mL min−1. The process carried out in presence of light with different wavelengths and intensities demonstrates the critical role of plasmon activation in enhancing the catalytic efficiency. Scanning Kelvin probe microscopy analysis reveals a lower work function for the Ag-FP/PVA under ambient light compared to the dark condition, providing an important insight into the catalytic degradation of MB. This study illustrates a general approach to developing cost-effective paper-based nanocomposites for effective catalysis in dip or flow mode, and gaining a mechanistic understanding of the process.","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 10","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145196761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Front Cover: (ChemNanoMat 7/2025) 封面：（ChemNanoMat 7/2025）

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2025-07-11 DOI: 10.1002/cnma.202580701

引用次数: 0

ZIF-8 Derived ZnO/Au Plasmonic Photocatalyst Boosts CO2 Reduction to MeOH Generation ZIF-8衍生ZnO/Au等离子体光催化剂促进CO2还原生成MeOH

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2025-07-09 DOI: 10.1002/cnma.202500196

Bapan Biswas, Sagar Varangane, Switi Dattatraya Kshirsagar, Saad Mehmood, Ujjwal Pal

{"title":"ZIF-8 Derived ZnO/Au Plasmonic Photocatalyst Boosts CO2 Reduction to MeOH Generation","authors":"Bapan Biswas, Sagar Varangane, Switi Dattatraya Kshirsagar, Saad Mehmood, Ujjwal Pal","doi":"10.1002/cnma.202500196","DOIUrl":"https://doi.org/10.1002/cnma.202500196","url":null,"abstract":"Photocatalytic CO2 conversion into renewable solar fuels offers a dual solution for reducing greenhouse gas emissions and meeting sustainable energy demands. To employ this, plasmonic nanoparticles (PNPs) are one of the best candidates which exhibit exceptional broadband optical absorption and localized surface plasmon resonance-mediated electromagnetic field confinement, enabling precise photochemical energy conversion to enhance solar-driven catalytic CO2 reduction efficiency. In this report, ZIF-8-derived ZnO is synthesized at controlled pyrolysis process, and heterostructure formed with Au nanoparticles to develop plasmonic Aux/ZnO (AZN) photocatalyst. The hybrid heterostructure catalyst with very low Au-loaded (AZN0.1) exhibits CO2 reduction to methanol with rate of 211.95 μmol g−1 h−1, which is nearly four times higher than the pristine ZIF-8 derive ZnO. The electron paramagnetic resonance signals’ observed g-values in ZnO are characteristic of surface defect like oxygen vacancies and trends of decreasing defect are also observed in photoluminescence spectroscopy after incorporation of Au NPs on the surface of defective ZnO. Here, Au co-catalyst forms a Schottky junction with ZnO, enhancing charge separation by donating plasmon mediated hot electrons. Therefore, this study infers new insight for plasmon-mediated preparation of Au/ZnO heterojunction for efficient photocatalytic CO2 reduction to MeOH.","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 10","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145196663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Effect of NH3 on the Nature of Ag-Nanoparticles Prepared via the Borohydride Reduction NH3对硼氢化物还原法制备银纳米颗粒性质的影响

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2025-07-09 DOI: 10.1002/cnma.202400633

Stephena Elsie, Alina Sermiagin, Tomer Zidki, Dan Meyerstein

引用次数: 0

Rice Straw-Derived Activated Carbon/PNIPAM Nanocomposite Hydrogel for Efficient Adsorptive Removal of Synthetic Dyes 稻秆源活性炭/PNIPAM纳米复合水凝胶高效吸附去除合成染料

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2025-07-09 DOI: 10.1002/cnma.202500237

Onkar Nath, Amul Jain, Koushik Mahata, Sanjib Banerjee

{"title":"Rice Straw-Derived Activated Carbon/PNIPAM Nanocomposite Hydrogel for Efficient Adsorptive Removal of Synthetic Dyes","authors":"Onkar Nath, Amul Jain, Koushik Mahata, Sanjib Banerjee","doi":"10.1002/cnma.202500237","DOIUrl":"https://doi.org/10.1002/cnma.202500237","url":null,"abstract":"The persistent discharge of synthetic dyes into water bodies presents a critical environmental challenge due to their toxicity, nonbiodegradability, and persistent pollution. This study explores an eco-friendly approach to dye remediation using a nanocomposite hydrogel synthesized from rice straw-derived activated carbon (AC) embedded within a poly(N-isopropylacrylamide) (PNIPAM) matrix. Rice straw, an abundant agricultural waste, is converted into AC through pyrolysis followed by KOH activation, yielding a porous, graphitic-like structure with high surface functionality and characterized using FT-IR, powder X-ray diffraction analysis, Raman spectroscopy, FESEM, and HRTEM. The PNIPAM/AC nanocomposite hydrogel is synthesized via free-radical polymerization. The nanocomposite demonstrates high adsorption efficiency for congo red (anionic) is 94% and for rhodamine B (cationic) it is 71%, attributed to strong π–π interactions, electrostatic attraction, and enhanced diffusion through the hydrogel network. The material is a sustainable and cost-effective solution for industrial wastewater treatment.","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 10","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145196664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Enhanced Catalytic Performance of Rhodium-Loaded EWT Zeolite Catalysts: Synthesis, Metal Dispersion, and Structural Effects 负载铑的EWT沸石催化剂的催化性能增强：合成、金属分散和结构效应

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2025-07-09 DOI: 10.1002/cnma.202400676

Yangxiao Jia, Jianjian Yang, Shian Chen, Ronghua Gu, Shaoping Zhang, Jiatong Bao, Wenlin Li, Xi Wang

{"title":"Enhanced Catalytic Performance of Rhodium-Loaded EWT Zeolite Catalysts: Synthesis, Metal Dispersion, and Structural Effects","authors":"Yangxiao Jia, Jianjian Yang, Shian Chen, Ronghua Gu, Shaoping Zhang, Jiatong Bao, Wenlin Li, Xi Wang","doi":"10.1002/cnma.202400676","DOIUrl":"10.1002/cnma.202400676","url":null,"abstract":"Cyclohexanol is a vital raw material in the synthesis of various chemicals and serves as a key intermediate in nylon production, thereby playing a crucial role in the chemical industry. Herein, the preparation and catalytic performance of Rh/EWT zeolite are reported, featuring highly dispersed Rh sites on EWT frameworks. This catalyst exhibits high reactivity in the selective hydrogenation of phenol to cyclohexanol. The findings indicated that selectivity is influenced by the Rh particle size on the support, with Rh particles smaller than 5.0 nm significantly enhancing cyclohexanol selectivity. Time-resolved phenol conversion studies reveal cyclohexanone as the initial product. The encapsulated Rh catalyst accelerates the subsequent conversion of cyclohexanone to cyclohexanol. Additionally, it is observed that cyclohexanol selectivity initially decreases and then increases with rising temperatures between 60 and 120 °C and is proportional to hydrogen pressure. Moreover, it is demonstrated that the catalytic performance differences originate from variations in Rh's electronic properties, which are determined by particle size differences between the zeolite-supported catalysts. Overall, this work underscores the breakthrough potential of Rh/zeolite catalysts, composed of highly dispersed Rh species on zeolites, in hydrogenation processes.","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 9","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145101327","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Self-Fluorescent Arginine-Functionalized Hydroxyapatite Nanoparticles for Efficient siRNA Delivery and Gene Silencing in Pluripotent Stem Cells and Bioimaging Applications 自荧光精氨酸功能化羟基磷灰石纳米颗粒在多能干细胞和生物成像应用中的高效siRNA传递和基因沉默

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2025-07-04 DOI: 10.1002/cnma.202500047

Asha Dahiya, Aishwarya Padhye, Pranjita Zantye, Jyutika Rajwade, Meenal Kowshik, Indrani Talukdar

{"title":"Self-Fluorescent Arginine-Functionalized Hydroxyapatite Nanoparticles for Efficient siRNA Delivery and Gene Silencing in Pluripotent Stem Cells and Bioimaging Applications","authors":"Asha Dahiya, Aishwarya Padhye, Pranjita Zantye, Jyutika Rajwade, Meenal Kowshik, Indrani Talukdar","doi":"10.1002/cnma.202500047","DOIUrl":"10.1002/cnma.202500047","url":null,"abstract":"Nanoparticles with high transfection efficiency and bioimaging applications offer a versatile tool for basic research and clinical applications in fields such as gene therapy, regenerative medicine, and diagnostics. In this article, we synthesized an undoped, self-fluorescent monomeric arginine (R) functionalized hydroxyapatite nanoparticles (RHNPs) as a cost-effective and stable gene delivery agent, also useful for bioimaging applications. Synthesized by a modified sol-gel method, RHNPs have a diameter ranging from 30 to 40 nm, display pure phase, and possess a positively charged surface with a significant zeta potential of 6.98 mV. RHNPs also show an excellent binding capacity for siRNA and enhanced cellular uptake. RHNP-mediated siRNA delivery in mouse embryonic stem cells (mESCs) demonstrated a twofold higher knockdown efficiency than a commercial transfection reagent at a twofold lower concentration (25 nM). The self-fluorescent property of RHNPs helped to demonstrate its efficient uptake and biodistribution both in vitro and in vivo. Toxicity evaluation of RHNPs showed no acute adverse effect on body weight and hematological parameters in mice models when administered in vivo, even at the highest concentration tested. These findings collectively establish RHNP as an excellent self-fluorescent gene delivery agent with the potential for in vitro and in vivo biomedical applications.","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 9","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145100886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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