ChemNanoMat最新文献_第5页

Insights into Mechanisms of Reverse Water Gas Shift Activity Enhancement over Reverse Microemulsion-Synthesized CuCeO2 对反向微乳液合成的 CuCeO2 提高反向水气相转移活性机理的见解

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2024-07-29 DOI: 10.1002/cnma.202400128

Kishore Kandasamy, Yue Yu, Muhammad Waqas Iqbal, Luis Ricardez-Sandoval, Aiping Yu, David S. A. Simakov

{"title":"Insights into Mechanisms of Reverse Water Gas Shift Activity Enhancement over Reverse Microemulsion-Synthesized CuCeO2","authors":"Kishore Kandasamy, Yue Yu, Muhammad Waqas Iqbal, Luis Ricardez-Sandoval, Aiping Yu, David S. A. Simakov","doi":"10.1002/cnma.202400128","DOIUrl":"10.1002/cnma.202400128","url":null,"abstract":"Copper-doped ceria (CuCeO2) catalysts with 0–26.5 Cu/(Cu+Ce) at% were synthesized via the reverse microemulsion method. X-ray diffraction analysis of freshly synthesized and spent (post-reaction) catalysts showed no separate phase of copper or copper oxide, indicating that Cu was incorporated into the CeO2 lattice, replacing Ce. Temperature programmed desorption experiments showed that the activation energy of CO2 desorption increased for higher Cu loadings, indicating stronger CO2 adsorption. This phenomenon was attributed to enhanced formation of oxygen vacancies due to Cu doping. X-ray photoelectron spectroscopy further confirmed the enhanced generation of oxygen vacancies due to Cu incorporation. Catalytic performance evaluation with the H2/CO2 feed in the 300–600 °C range showed that all catalysts were 100 % selective to CO generation, with higher Cu loadings resulting in CO2 conversion close to equilibrium values at 500–600 °C. The activation energy of the reaction, determined through reaction tests, exhibited inverse relationship with the activation energy of CO2 desorption. The relationship between these two energy barriers is explored, providing valuable insights into the mechanism of RWGS activity enhancement.","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"10 11","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cnma.202400128","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141867871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Optimisation and Characterisation of Improved Nanoemulsion Formulations Containing Ceramide 3 含有神经酰胺 3 的改进型纳米乳液配方的优化与特性分析

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2024-07-28 DOI: 10.1002/cnma.202400289

Fan Xu, Yuxin Liu, Jun Zhu, Xin Zhan, Yinmao Dong, Hong Meng, Shujing Li, Yifan He, Ze Zhang

{"title":"Optimisation and Characterisation of Improved Nanoemulsion Formulations Containing Ceramide 3","authors":"Fan Xu, Yuxin Liu, Jun Zhu, Xin Zhan, Yinmao Dong, Hong Meng, Shujing Li, Yifan He, Ze Zhang","doi":"10.1002/cnma.202400289","DOIUrl":"10.1002/cnma.202400289","url":null,"abstract":"Ceramide3 (Cer3) is one of the important components of stratum corneum (SC) lipids with good moisturizing and repairing properties. However, it suffers from (a) poor solubility, (b) easy crystallization and precipitation, and (c) strong polarity and difficulty in transdermal application. This study aimed to load Cer3 into nanoemulsions (NEs) to overcome these mentioned defects. The optimized NEs formulation was prepared by high pressure homogenization method and characterized by several methods. The optimized ceramide3 nanoemulsions (Cer3-NEs) exhibited a good physico-chemical stability over 3 months under different conditions, with droplet size of 103.1 nm, PDI of 0.178, zeta potential of −39.09 mV, pH of 6.20 and encapsulation efficiency of 96.39 %. Turbiscan results showed that formulations containing Cer3-NEs have better stability than those containing free Cer3. The dermal delivery ability of Cer3-NEs was assessed by Franz diffusion and confocal Raman spectroscopy (CRM). In vitro and in vivo penetration studies showed that Cer3-NEs serum have almost 2–3 times higher retention in the skin and permeation in the receptor solution compared to serum with free Cer3. The findings show NE is a promising carrier of Cer3 for topical administration in the treatment of dryness and barrier damage due to higher stability and better skin permeability.","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"10 11","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141867915","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

Molecular Imprinting-Involving Highly Selective Tetracycline Detection Platform Based on Mn2V2O7 with Excellent Oxidase-Mimicking Activity 基于具有卓越氧化酶模拟活性的 Mn2V2O7 的分子印迹涉及高选择性四环素检测平台

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2024-07-24 DOI: 10.1002/cnma.202400196

Huanjun Zhao, Xinxin Xu, Jin Chen

{"title":"Molecular Imprinting-Involving Highly Selective Tetracycline Detection Platform Based on Mn2V2O7 with Excellent Oxidase-Mimicking Activity","authors":"Huanjun Zhao, Xinxin Xu, Jin Chen","doi":"10.1002/cnma.202400196","DOIUrl":"10.1002/cnma.202400196","url":null,"abstract":"Nanozymes-involving colorimetry may represent an effective solution to tetracycline detection due to its affordability and simplicity. To improve the performance in selectivity, molecular imprinting technology has emerged as a promising approach to simulating the interaction between antibodies and receptors. Herein, Mn2V2O7, a form of nanozyme with oxidase-mimicking activity, was synthesized. With tetracycline as the template, the cavities with unique dimensions were constructed through the self-polymerization of dopamine (DA) on Mn2V2O7. In Mn2V2O7@MIP, polydopamine (PDA) acts as molecularly imprinted polymer (MIP) and its cavities are compatible with tetracycline in dimension. It also exhibits oxidase-mimicking activity. With the introduction of tetracycline, the cavity of PDA is blocked, which leads to obvious color fading, which enables precise tetracycline detection with colorimetry. The range of linear detection is from 10 to 100 μM, and the lower limit of detection is 0.82 μM. It is anticipated that the combination between nanozymes-involving colorimetry and molecular imprinting technology would contribute to the accurate detection of organic pollutants in the aquatic environment.","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"10 10","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141773284","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

Tailoring the Lattice Thermal Conductivity of Al-Incorporated Ag2Se for Near Room Temperature Waste Heat Recovery 调整掺入铝的 Ag2Se 的晶格热导率，实现近室温余热回收

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2024-07-24 DOI: 10.1002/cnma.202400298

Tony Mathew, V. Vijay, J. Archana, Dr. M. Navaneethan, S. Ponnusamy

引用次数: 0

In-Situ Growth of 2D to 3D NiO on Nickel Foam with Enhanced Capacity Retention as Battery-Type Electrode for Asymmetric Supercapacitor 在镍泡沫上就地生长二维至三维氧化镍，提高电池式电极的电容保持能力，用于异向超级电容器

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2024-07-24 DOI: 10.1002/cnma.202400210

Siti Wihdatul Himmah, Ni Luh Wulan Septiani, Shofarul Wustoni, Raissa, Yuda Prima Hardianto, Hyungjun Kim, Mia Rinawati, Min-Hsin Yeh, Brian Yuliarto, Ahmad Nuruddin

{"title":"In-Situ Growth of 2D to 3D NiO on Nickel Foam with Enhanced Capacity Retention as Battery-Type Electrode for Asymmetric Supercapacitor","authors":"Siti Wihdatul Himmah, Ni Luh Wulan Septiani, Shofarul Wustoni,  Raissa, Yuda Prima Hardianto, Hyungjun Kim, Mia Rinawati, Min-Hsin Yeh, Brian Yuliarto, Ahmad Nuruddin","doi":"10.1002/cnma.202400210","DOIUrl":"10.1002/cnma.202400210","url":null,"abstract":"This work presents a systematic study to synthesize NiO on nickel foam (NF) using a straightforward and cost-efficient hydrothermal method, followed by calcination. Through comprehensive physicochemical analyses, it was demonstrated that the properties of the NF@NiO could be modulated by adjusting the concentration of the nickel (II) nitrate hexahydrate precursor. Notably, a morphological transition from a 2D sheet-like structure to a 3D rambutan-like formation was observed as the precursor concentration increased. The best-performing NF@NiO 4 mM showed a maximum areal capacity of 723 mC cm−2 (equivalent to 547.73 F g−1) at a current density of 0.5 mA cm−2. This electrode also maintained remarkable cycle stability, retaining 78.9% of its capacitance after 10,000 cycles at a current density of 50 mA cm−2 in 2 M KOH. Furthermore, the assembled asymmetric supercapacitor (ASC) (NiO 4 mM//AC) achieved a specific capacitance of 64.79 F g−1 at a current density of 1 A g−1 with an energy density of 17.63 Wh kg−1 at a power density of 700 W kg−1.","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"10 11","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141773040","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

Surface Engineering of N-Doped Carbon Derived from Polyaniline for Primary Zinc-Air Batteries 用于初级锌-空气电池的聚苯胺掺 N 碳表面工程

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2024-07-23 DOI: 10.1002/cnma.202400361

B. Sc. Ángel Chávez-Hernández, Dr. Carlos M. Ramos-Castillo, Prof. Amelia Olivas, Dr. Anabel D. Delgado, Prof. Minerva Guerra-Balcázar, Prof. Lorena Álvarez-Contreras, Dr. Noé Arjona

{"title":"Surface Engineering of N-Doped Carbon Derived from Polyaniline for Primary Zinc-Air Batteries","authors":"B. Sc. Ángel Chávez-Hernández, Dr. Carlos M. Ramos-Castillo, Prof. Amelia Olivas, Dr. Anabel D. Delgado, Prof. Minerva Guerra-Balcázar, Prof. Lorena Álvarez-Contreras, Dr. Noé Arjona","doi":"10.1002/cnma.202400361","DOIUrl":"10.1002/cnma.202400361","url":null,"abstract":"Zinc-air batteries (ZABs) with metal-free cathodes are considered environmentally friendly and cost-effective. However, more active and durable catalysts are required for this purpose. Herein, polyaniline (PANI)-derived carbon materials were obtained to boost the oxygen reduction reaction (ORR) and, consequently, the performance of a primary ZAB. The developed porous N-doped carbon (NDC) materials were engineered by varying the polymerization time and calcination temperature (500–900 °C). SEM micrographs and BET surface areas showed that the polymerization of aniline under cold conditions (5 °C) at 6, 8, or 24 h did not have a significant effect on the morphology or surface area. The fibrous structure of PANI was engineered by temperature, resulting in a progressive increase in the surface area until a three-dimensional porous structure was achieved at 900 °C with the highest area of 601.9 m2 g−1. The surface doping of nitrogen species shifted from PANI-rich N species to enriched graphitic N from 12.69 % (500 °C) to 24.26 % at 900 °C. The NDC 900 °C presented a voltage of 1.4 V and power density of 56 mW cm−2 (only 7 mW cm−2 lower than that of Pt/C). The results demonstrate that this material is an excellent candidate for high-performance primary ZABs.","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"10 10","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141773282","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

Efficient Electrocatalysts for Alkaline Oxygen Evolution Reaction from Wolframite Derived Heteroatom Materials 利用钨酸盐衍生异质原子材料实现碱性氧进化反应的高效电催化剂

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2024-07-22 DOI: 10.1002/cnma.202400165

Linghui Li, Sandrine Tusseau-Nenez, Clément Marchat, Cédric Tard

引用次数: 0

Chitosan Mediated FAPbBr3 Nanocrystal Thin-Films with High Color Purity and Enhanced Hole Mobility 壳聚糖介导的 FAPbBr3 纳米晶体薄膜具有高色纯度和更高的孔迁移率

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2024-07-22 DOI: 10.1002/cnma.202400355

Nilesh Monohar Sethi, Amlandeep Nayak, Kanha Ram Khator, Naupada Preeyanka, Debabrata Chakraborty, Satyaprasad P Senanayak, Moloy Sarkar

{"title":"Chitosan Mediated FAPbBr3 Nanocrystal Thin-Films with High Color Purity and Enhanced Hole Mobility","authors":"Nilesh Monohar Sethi, Amlandeep Nayak, Kanha Ram Khator, Naupada Preeyanka, Debabrata Chakraborty, Satyaprasad P Senanayak, Moloy Sarkar","doi":"10.1002/cnma.202400355","DOIUrl":"10.1002/cnma.202400355","url":null,"abstract":"Composite materials which combine the advantages of both embedded constituents have been a successful strategy for developing novel multi-functional materials. Here, we demonstrate the synthesis of nanoscale materials of organic-inorganic hybrid lead halide perovskites (OIH-LHP) with enhanced optoelectronic properties and photostability by utilizing biomimetic ligand, chitosan. Notably, nanocrystals fabricated with chitosan mediated ligands exhibit an increase in photoluminescence quantum yield by 300 % and fluorescence lifetime by 1.5 times. Consequently, the lifetime distribution of the photoluminescence emission decreases to a value as low as 6 ns. More interestingly, even though chitosan is a wide band gap insulating material, its incorporation onto the perovskite NCs enhances the bulk hole mobility by at least an order of magnitude in comparison to the pristine material. With detailed spectroscopic and structural studies, we correlate these enhancements in optoelectronic parameters to the improvement in the crystal quality, phase purity, and minimized poly-dispersity of the nanocrystals. Development of such composite materials with unprecedented optoelectronic properties and outstanding stability will contribute immensely towards high performance nanocrystal devices.","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"10 10","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141773285","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

Growth Mediated Disassembly of Cucurbit[8]uril Cross-linked Static Cubic Self-assembly of Silver Nanoparticles 生长介导的葫芦[8]脲交联银纳米粒子静态立方体自组装的分解

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2024-07-22 DOI: 10.1002/cnma.202400407

Sancharika Dalal, Dr. Kalyan K. Sadhu

{"title":"Growth Mediated Disassembly of Cucurbit[8]uril Cross-linked Static Cubic Self-assembly of Silver Nanoparticles","authors":"Sancharika Dalal, Dr. Kalyan K. Sadhu","doi":"10.1002/cnma.202400407","DOIUrl":"10.1002/cnma.202400407","url":null,"abstract":"Static self-assembly resides in thermodynamically stable global minima of the energy landscape, whereas dynamic self-assembly occupies local minima of the energy profile and remains in the ordered state for a limited time via dissipation of energy to surroundings. This makes the spatiotemporal control over the assembly and disassembly mechanism easily controllable in the case of dynamic self-assembly. However, due to the higher thermal stability of static self-assembly, it is very challenging to perform reverse engineering on these types of systems. Herein we report growth reaction-based reversal of static silver cubes obtained via cucurbit[8]uril (CB[8]) crosslinked self-assembly of silver nanoparticles (AgNP). The AgNP building units with variable CB[8] surface coverage have been used as seeds onto which deposition of gold via growth reaction has been performed. The disassembly of supracube structure has been controlled by the formation of [AuCl4]−–CB[8] complex and successive reduction of [AuCl4]− to Au0 on the surface of the seed. The resulting monodispersed isotropic nanoparticles, formed from the CB[8] based cubic self-assembly after growth, exhibit Au−Ag bimetallic nature. Quenching of the fluorogenic response from the hydrophobic dye coumarin-7, added after growth, suggests direct interaction with the metallic nanoparticle surface after disassembly and thereby confirms successful growth reaction mediated reversal of self-assembly.","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"10 10","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141773286","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

Copper-Cobalt Bimetallic Nanoparticles for the Acceptorless Dehydrogenation of Alcohols: A Combined Experimental and Theoretical Study 用于醇类无受体脱氢的铜钴双金属纳米颗粒：实验与理论的综合研究。

IF 2.6 4区材料科学

ChemNanoMat Pub Date : 2024-07-21 DOI: 10.1002/cnma.202400259

Ning Huang, Chaima Hammed, Guillaume Wang, Sophie Nowak, Philippe Decorse, Delphine Schaming, Anis Gannouni, Wahiba Najjar, Carine Michel, Lorette Sicard, Jean-Yves Piquemal

{"title":"Copper-Cobalt Bimetallic Nanoparticles for the Acceptorless Dehydrogenation of Alcohols: A Combined Experimental and Theoretical Study","authors":"Ning Huang, Chaima Hammed, Guillaume Wang, Sophie Nowak, Philippe Decorse, Delphine Schaming, Anis Gannouni, Wahiba Najjar, Carine Michel, Lorette Sicard, Jean-Yves Piquemal","doi":"10.1002/cnma.202400259","DOIUrl":"10.1002/cnma.202400259","url":null,"abstract":"Bimetallic Cu and Co nanoparticles were prepared using the polyol process. The nature of the polyol was found to be decisive to control the distribution of the two metals within the particles, resulting in either core-shell or quasi-alloyed structures, as shown by chemical analysis at the single particle level. The particles can be prepared over the entire composition range with a very good control of the Cu/Co molar ratio. The introduction of Cu in the synthetic system allows decreasing significantly the mean size of the resulting particles. The two sets of particles were used as unsupported catalysts for the solvent-free acceptorless dehydrogenation of octan-2-ol. Very good ketone yields were measured when using the quasi-alloyed particles while lower activities were obtained with core-shell structures. The Cu25Co75 quasi-alloyed catalyst could be recycled at least ten times without a significant loss in catalytic activity and particle-scale chemical analyses confirmed that the recovered particles are still alloyed with no observed demixing. The catalytic results are discussed in the light of different exposed metal surface areas and possible synergetic effects using theoretical predictions.","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"10 11","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cnma.202400259","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141773287","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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