ChemNanoMat最新文献_第9页

Enhanced Stability of Pt-Co Catalysts Supported on Zeolite Nanosponges for Propane Dehydrogenation 沸石纳米海绵负载Pt-Co催化剂丙烷脱氢稳定性的提高

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2025-01-20 DOI: 10.1002/cnma.202400527

Dr. Muhammad Numan, Nam Sun Kim, Prof. Changbum Jo

{"title":"Enhanced Stability of Pt-Co Catalysts Supported on Zeolite Nanosponges for Propane Dehydrogenation","authors":"Dr. Muhammad Numan, Nam Sun Kim, Prof. Changbum Jo","doi":"10.1002/cnma.202400527","DOIUrl":"https://doi.org/10.1002/cnma.202400527","url":null,"abstract":"Pt and Co supported on Al2O3, Na+-free SiO2, mesoporous zeolite (MZ-Na+), and Na+-free MZ (MZ-OH) were prepared and investigated for propane dehydrogenation efficacy. These catalysts were characterized using XRD, STEM, CO-FTIR, H2-TPR, and XPS. Of these catalysts, Pt−Co supported on MZ-Na+ and Al2O3 showed low activity and poor stability for propane dehydrogenation (PDH). On the other hand, Pt−Co supported on Na+-free SiO2 or MZ-OH exhibited much greater activity and stability. This high catalytic performance was attributed to the formation of a high degree of alloying between Pt and Co, possibly facilitated by silanol groups. After optimizing cobalt content and catalyst reduction temperature, it was found that 1 wt% Pt-0.8 wt% Co supported on MZ-OH exhibited the best activity with a propane conversion of 64.4 % and propylene selectivity of 76.5 % that remained stable over 24 h on-stream. The correlation between catalyst characterization and PDH results showed that the existence of metallic cobalt on the catalyst surface facilitated coke deposition in the form of CoCx and poor catalyst stability.","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 2","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404774","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

Production of Uniform Electrospun 2-Cyanopyridinium Salicylate – Polyvinyl Alcohol Nanofibersusing Cylindrical Bar Collector for Nonlinear Optical Applications 非线性光学用圆柱形棒集热器制备均匀电纺2-水杨酸氰吡啶-聚乙烯醇纳米纤维

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2025-01-20 DOI: 10.1002/cnma.202400590

Kintali Manohor Prasad, S. Divagar, P. Srinivasan

{"title":"Production of Uniform Electrospun 2-Cyanopyridinium Salicylate – Polyvinyl Alcohol Nanofibersusing Cylindrical Bar Collector for Nonlinear Optical Applications","authors":"Kintali Manohor Prasad, S. Divagar, P. Srinivasan","doi":"10.1002/cnma.202400590","DOIUrl":"https://doi.org/10.1002/cnma.202400590","url":null,"abstract":"The electrospinning technique was used to synthesize nanofibers of organic 2-cynopyridinium salicylate (2-CPSC) molecules embedded in polyvinyl alcohol (PVA) polymer using both a drum collector and an indigenously made parallel bar cylindrical collector unit. The microscopical analysis was performed for the preliminary morphological study of the collected nanofibers using both a drum collector and a parallel bar collector. Scanning electron microscopic (SEM) analysis confirmed the formation of smooth, clear, cylindrical shape, and highly homogenous 2-CPSC – PVA nanofibers collected from the parallel bar collector unit compared to the drum collector, and these homogenous nanofibers were selected for further characterization. X-ray diffraction (XRD) study demonstrates the preferred crystallographic orientation of organic 2-CPSC molecules inside the host PVA polymer. The synthesized nanofibers were characterized using Fourier Transform Infrared (FTIR) Spectroscopy to confirm the presence of different molecular vibrations. Using ultraviolet-visible (UV-Vis) spectroscopic analysis, the complete transparency of the 2-CPSC – PVA nanofiber throughout the visible region is observed, and from Tauc's plot, the obtained optical band gap energy (Eg) is 5.24 eV. The Z-scan technique was employed to investigate the nonlinear absorption coefficient (β), nonlinear refractive index (n2), and third-order nonlinear susceptibility (<math></math>\u0000).","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 2","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404813","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

Glycyrrhetinic Acid Prohibiting Fusion Peptides from Fusing with Cell Membrane 甘草次酸阻止融合肽与细胞膜融合

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2025-01-14 DOI: 10.1002/cnma.202400614

Zili Jia, Rongrong Wu, Yun Hao, Xiaolu Song, Shuai Hou, Changwei Shi, Yihao Cui, Lei Liu, Taofeng Zhu

{"title":"Glycyrrhetinic Acid Prohibiting Fusion Peptides from Fusing with Cell Membrane","authors":"Zili Jia, Rongrong Wu, Yun Hao, Xiaolu Song, Shuai Hou, Changwei Shi, Yihao Cui, Lei Liu, Taofeng Zhu","doi":"10.1002/cnma.202400614","DOIUrl":"https://doi.org/10.1002/cnma.202400614","url":null,"abstract":"The inhibition of the fusion peptide (FP) of the spike protein of coronaviruses, which mediates interactions with the host cell membrane, plays a critical role in the membrane fusion process. In this study, we investigated the interactions between the FP and cell membranes and evaluated the effect of three drug molecules — neferine (Nef), glycyrrhetinic acid (GA), quercetin (Qct) on the membrane fusion process by combining molecular dynamics (MD) simulations and experimental methods. Our findings revealed that glycyrrhetinic acid exhibited strong binding ability towards the FP (residues 815–828), with particularly interactions observed with key residues L821, L822, F823, and L828. Furthermore, we performed FITC fluorescence staining experiments on cells and assessed the inhibitory effects of glycyrrhetinic acid on FP. The results showed a significant reduction in fluorescence intensity in the FP-FITC experiment group treated with glycyrrhetinic acid, indicating that glycyrrhetinic acid interferes with the binding ability of FP and disrupts its localization on the cell membrane. Overall, this research will contribute to a deeper understanding of the inhibition mechanism of FP's membrane fusion process, which widely exists in the intrusion process between viruses and cells.","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 3","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143689093","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 1/2025) 封面：（ChemNanoMat 1/2025）

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2025-01-10 DOI: 10.1002/cnma.202580101

引用次数: 0

Pt(II) Complex-Based Supramolecular Polymers with Fe(II) Ion 基于Pt（II）配合物的Fe（II）离子超分子聚合物

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2025-01-10 DOI: 10.1002/cnma.202400533

Junseo Kim, Minhye Kim, Dr. Heekyoung Choi, Prof. Dr. Jong Hwa Jung

{"title":"Pt(II) Complex-Based Supramolecular Polymers with Fe(II) Ion","authors":"Junseo Kim, Minhye Kim, Dr. Heekyoung Choi, Prof. Dr. Jong Hwa Jung","doi":"10.1002/cnma.202400533","DOIUrl":"https://doi.org/10.1002/cnma.202400533","url":null,"abstract":"In recent years, there has been significant interest in supramolecular architectures such as helical fibers, tubules, and nanotoroids (nanorings) due to their unique physical properties. In this study, we synthesized bis[terpyridine-based Pt(II)] complexes with an unoccupied terpyridine moiety on the opposite side. Interestingly, the mononuclear terpyridine-based Pt(II) complexes (Pt-L1 and Pt-L2) form helical supramolecular polymers. These supramolecular polymers, exhibited intense photoluminescence at 570–620 nm, corresponding to metal-to-ligand charge transfer (MLCT) and/or metal-metal ligand charge transfer (MMLCT). Conversely, the supramolecular polymers formed in the presence of Fe2+ ions were non-emissive. The metallosupramolecular polymers formed in the absence and presence of Fe2+ ions were generated by π-π and intermolecular hydrogen bonding interactions and/or Pt⋅⋅⋅Pt interactions. The supramolecular polymers were formed through a cooperative pathway involving a nucleation-elongation mechanism. The nonsigmoidal transition of the absorbance change could be fitted by using the equilibrium (EQ) model, from which the thermodynamic parameters (ΔGe, ΔHe, and ΔS) were determined. At 4 mM, the Gibbs′ free energy (ΔGe) of the supramolecular polymers of Pt-L1 and Pt-L2 without metal ions was calculated to be −18.9 and −17.4 kJ/mol, respectively.","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 2","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404691","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

Recent Advancements in Metal-Organic Frameworks-Derived Metal Phosphides as Anode for Lithium-Ion Batteries 金属有机骨架衍生金属磷化物作为锂离子电池负极的研究进展

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2024-12-24 DOI: 10.1002/cnma.202400504

Junjie Yang, Jun Li, Chenxuan Xu, Binbin Wen, Linjun Si, Weifeng Shen, Zhenqiu Feng, Wanxin Mai, Xiaoming Lin, Yongbo Wu, Huachao Yang

{"title":"Recent Advancements in Metal-Organic Frameworks-Derived Metal Phosphides as Anode for Lithium-Ion Batteries","authors":"Junjie Yang, Jun Li, Chenxuan Xu, Binbin Wen, Linjun Si, Weifeng Shen, Zhenqiu Feng, Wanxin Mai, Xiaoming Lin, Yongbo Wu, Huachao Yang","doi":"10.1002/cnma.202400504","DOIUrl":"https://doi.org/10.1002/cnma.202400504","url":null,"abstract":"Transition metal phosphides (TMPs) are considered as a promising anode material for LIBs due to their potential high theoretical capacity, suitable lithiation potential and low polarization, but low conductivity and severe volume expansion limit the performance of TMPs. Since metal-organic framework (MOFs)-derived materials can inherit the advantages of MOFs, MOFs-derived metal phosphides have been widely used as anodes for LIBs and exhibit outstanding electrochemical performance. The MOFs derivatization strategy can be used to achieve the adjustment and optimization of the components and structure of metal phosphide composites, such as constructing rich heterojunction structure or designing stable carbon skeleton structure. These modifications effectively improve the electronic structure and structural stability of metal-phosphide composites, thus solving the current problems of TMPs. In conclusion, this paper systematically summarizes the basic strategies for the modification and preparation of TMPs applied to the field of energy conversion and energy storage from the phosphorus source used in the preparation of TMPs, and finally compares the preparation methods, modification and lithium storage properties of monometallic/bimetallic phosphides derived from MOFs, and looks ahead to the characteristics and possible future development of the metal phosphides obtained by derivatization of MOFs as precursor.","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 2","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404822","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

Bifunctional Zr-MgAl Layered Double Hydroxide Catalyst for Sustainable Transfer Hydrogenation of Ethyl Levulinate to γ-Valerolactone 双功能Zr-MgAl层状双氢氧化物催化剂乙酰丙酸乙酯可持续转移加氢制备γ-戊内酯

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2024-12-23 DOI: 10.1002/cnma.202400564

Sahil Kumar, Priyanka Choudhary, Devendra Sharma, Venkata Krishnan

引用次数: 0

Enhancing Epoxy Composites with Graphene and Graphene Oxide: Thermal and Mechanical Insights 增强环氧复合材料与石墨烯和氧化石墨烯：热和机械的见解

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2024-12-23 DOI: 10.1002/cnma.202400488

Sławomir Wilczewski, Zdzisław Nowak, Michał Maj, Magdalena Osial, PhD Roman Minikayev, Michael Giersig

{"title":"Enhancing Epoxy Composites with Graphene and Graphene Oxide: Thermal and Mechanical Insights","authors":"Sławomir Wilczewski, Zdzisław Nowak, Michał Maj, Magdalena Osial, PhD Roman Minikayev, Michael Giersig","doi":"10.1002/cnma.202400488","DOIUrl":"https://doi.org/10.1002/cnma.202400488","url":null,"abstract":"This paper shows the graphene and graphene oxide nanoflakes as the 0.1, 0.5, 1, 2, and 4 wt.% reinforcement of epoxy-resin matrix to enhance the thermal and mechanical characteristics of the composite. Experimental measurement of the glass transition temperature and thermal expansion coefficient indicated that the addition of nanostructural filler improving the glass transition temperature about ~12 °C for nanocomposite filled carbon-based nanoparticles for both heating and cooling cycles compared to the bare epoxy resin. Young's elastic modulus measured by nanoindentation and the stress versus strain curves for different weight fractions of graphene nanoflakes additives during uniaxial compression and tension considered were obtained from the experiments. The distributions of logarithmic strain field for the transverse, axial and shear components on the nanocomposites sample surfaces, during the uniaxial tension process for quasi-static strain rates, were analyzed. The tensile strengths show improvement for nanocomposites with less than 1 % weight fraction of carbon-based nanoparticles. The compressive yield stress increased to a maximal value (at the recorded peak on the curve) for an epoxy nanocomposite having 2 wt.% oxidized graphene flakes, where both parameters were enhanced with the oxidized form of graphene for the more effective dispersion in the epoxy resin matrix over the bare graphene filler.","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 2","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404397","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

Bias Selectable Dual Band Detectors Based on Vertically Aligned In2S3-Coated ZnO Nanorod Arrays Grown on p-GaN 基于在p-GaN上生长的垂直排列in2s3包覆ZnO纳米棒阵列的偏置可选双波段探测器

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2024-12-23 DOI: 10.1002/cnma.202400557

Yu Qi, Lanfeng Li, Yaowen Xu, Guangcheng Gao, Naisen Yu, YunFeng Wu

引用次数: 0

Hierarchical Pore Engineering of Slope-Type Hard Carbon for Enhanced Sodium-Ion Storage 斜坡型硬碳增强钠离子储存的分级孔隙工程

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2024-12-23 DOI: 10.1002/cnma.202400562

Yongqi Liu, Yun Zhang, Zhaowei Hu, Wenjie Zhang, Chuan Wang, Jiabiao Lian

引用次数: 0