ChemPhysMater最新文献_第8页

Bimetallic synergistic Pd-Pt icosahedra as highly active peroxidase-like mimics for colorimetric analysis 双金属协同Pd-Pt二十面体作为高活性过氧化物酶样模拟物用于比色分析

ChemPhysMater Pub Date : 2023-06-25 DOI: 10.1016/j.chphma.2023.05.002

Xiaoxue Zhao, Zhe Li, Shu'na Wang, Zhenfeng Yuan, Yizhong Lu

{"title":"Bimetallic synergistic Pd-Pt icosahedra as highly active peroxidase-like mimics for colorimetric analysis","authors":"Xiaoxue Zhao, Zhe Li, Shu'na Wang, Zhenfeng Yuan, Yizhong Lu","doi":"10.1016/j.chphma.2023.05.002","DOIUrl":"https://doi.org/10.1016/j.chphma.2023.05.002","url":null,"abstract":"<div>Thanks to the synergistic effect, the bimetallic catalysts show better catalytic activity than the single metal catalysts and become a focus of research in heterogeneous catalysis. In this study, we successfully prepared Pd-Pt icosahedra which show high peroxidase-like activity under the synergistic effects of Pd and Pt. Vmax of the Pd-Pt icosahedra was significantly enhanced by 1.66 times for 3,3’,5,5’-tetramethylbenzidine (TMB) as the substrate and 1.23 times for H2O2 as the substrate, compared to that of the Pd icosahedra alone. By harnessing the superior peroxidase-like activity of Pd-Pt icosahedra, we successfully utilized Pd-Pt icosahedral nanozymes in various biological analyses based on colorimetry. In most cases, using a Pd-Pt icosahedra/H2O2/TMB system, glucose, glutathione (GSH), acid phosphatase (ACP), and alkaline phosphatase (ALP) were detected over a wide range of 0.05∼0.20 mM, 0∼20 mM, 0∼10 U/L and 0∼12 U/L. In this study, we prepared a novel bimetallic nanozyme that exhibited excellent peroxidase-like activity owing to the bimetallic synergistic effect, thus demonstrating the promising potential of Pd-Pt icosahedra in the field of bioanalysis.</div>","PeriodicalId":100236,"journal":{"name":"ChemPhysMater","volume":"2 4","pages":"Pages 295-302"},"PeriodicalIF":0.0,"publicationDate":"2023-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50193418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mesoporous carbon layer encapsulated SnSe nanosheets via covalent bonds for high-performance sodium ion batteries 用于高性能钠离子电池的共价键介孔碳层包覆SnSe纳米片

ChemPhysMater Pub Date : 2023-04-01 DOI: 10.1016/j.chphma.2022.09.002

Mengfei Wang , Liang Yang , Maocheng Liu

{"title":"Mesoporous carbon layer encapsulated SnSe nanosheets via covalent bonds for high-performance sodium ion batteries","authors":"Mengfei Wang , Liang Yang , Maocheng Liu","doi":"10.1016/j.chphma.2022.09.002","DOIUrl":"https://doi.org/10.1016/j.chphma.2022.09.002","url":null,"abstract":"<div>Sodium ion batteries (SIBs) have been widely studied because of their low cost, low standard redox potential, and abundant sodium availability. However, the structural rupture during the Na+ insertion/extraction processes and the poor conductivity of the anode material limit its cycling stability and rate capability. Herein, SnSe@C was prepared by high-temperature annealing with dopamine hydrochloride as the carbon source, while SnSe was prepared by a protein reduction method. The carbon layer not only works as a protective layer to limit the volume expansion of SnSe and reduce the dissolution of Na2Se and poly-selenides generated during the discharge process in the electrolyte, but also as a conductive matrix to expedite electron transfer, thereby boosting the cycling stability and rate capability of SnSe@C. Benefiting from the above advantages, SnSe@C exhibits a specific capacity of 211.3 mAh g−1 at 0.1 A g−1 after 110 cycles and outstanging rate capability (210.1 mAh g−1 at 5.0 A g−1 and capacity retention rate of 63.2% from 0.1 to 1.0 A g−1). This study not only proposes an idea for promoting the cycling stability and rate capability of SnSe, but also paves the way for providing anodic materials with a stable structure for SIBs.</div>","PeriodicalId":100236,"journal":{"name":"ChemPhysMater","volume":"2 2","pages":"Pages 164-171"},"PeriodicalIF":0.0,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50199485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Activating the hydrogen evolution reaction in low-dimensional carbon by partial hydrogenation: Role of the hybrid sp2-sp3 orbital interface 通过部分氢化激活低维碳中的析氢反应：杂化sp2-sp3轨道界面的作用

ChemPhysMater Pub Date : 2023-04-01 DOI: 10.1016/j.chphma.2022.12.001

Hanqing Yin , Aijun Du

{"title":"Activating the hydrogen evolution reaction in low-dimensional carbon by partial hydrogenation: Role of the hybrid sp2-sp3 orbital interface","authors":"Hanqing Yin , Aijun Du","doi":"10.1016/j.chphma.2022.12.001","DOIUrl":"https://doi.org/10.1016/j.chphma.2022.12.001","url":null,"abstract":"<div>Developing highly efficient catalyst for the hydrogen evolution reaction (HER) and understanding their mechanism is crucial for establishing the hydrogen economy. Carbon-based materials are particularly attractive as HER catalysts because of their abundance and morphological variety. Herein, using density functional theory (DFT) calculations, we propose for the first time a virtual interface consisting of sp2 and sp3 orbitals of carbon, for activating the intrinsically inert low-dimensional carbon toward the HER. This hybrid orbital interface is generated by pre-adsorbed hydrogen introduced by the partial hydrogenation of these low-dimensional carbon materials (C60, carbon nanotubes and graphene). The pre-adsorbed hydrogen can activate adjacent carbon atoms to become active sites for the HER. The best performance among these sites is comparable to that of the commercial Pt/C catalyst. Given that the partial hydrogenation of low-dimensional carbon has been experimentally realized, our work provides a simple yet novel concept for HER catalyst design.</div>","PeriodicalId":100236,"journal":{"name":"ChemPhysMater","volume":"2 2","pages":"Pages 180-184"},"PeriodicalIF":0.0,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50199487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Shape transformation of gold nanoparticles in aqueous CTAB/CTAC solution to generate high-index facets for electrocatalysis and SERS activity 金纳米颗粒在CTAB/CTAC水溶液中的形状转变以产生用于电催化和SERS活性的高指数面

ChemPhysMater Pub Date : 2023-04-01 DOI: 10.1016/j.chphma.2022.04.006

Yahui Song , Mengmeng Zhang , Hetong Fang , Haibing Xia

引用次数: 2

Enhanced visible-light-driven heterogeneous photocatalytic CO2 methanation using a Cu2O@Cu-MOF-74 thin film 使用增强型可见光驱动的非均相光催化CO2甲烷化Cu2O@Cu-MOF-74薄膜

ChemPhysMater Pub Date : 2023-04-01 DOI: 10.1016/j.chphma.2022.05.003

Hao Wu , Wahyu Prasetyo Utomo , Yuanmeng Tian , Chun Hong Mak , Hoi Ying Chung , Hsien-Yi Hsu , Jin Shang , Yun Hau Ng

{"title":"Enhanced visible-light-driven heterogeneous photocatalytic CO2 methanation using a Cu2O@Cu-MOF-74 thin film","authors":"Hao Wu , Wahyu Prasetyo Utomo , Yuanmeng Tian , Chun Hong Mak , Hoi Ying Chung , Hsien-Yi Hsu , Jin Shang , Yun Hau Ng","doi":"10.1016/j.chphma.2022.05.003","DOIUrl":"https://doi.org/10.1016/j.chphma.2022.05.003","url":null,"abstract":"<div>Cuprous oxide is a potential photocatalyst for the reduction of CO2. However, its high rate of charge recombination and low ability to adsorb CO2 limit its activity, particularly when gaseous CO2 was used. Herein, a Cu-based metal-organic framework (Cu-MOF-74) with high CO2 adsorption is coated onto Cu2O nanowires by a topotactic transformation method. The optimized Cu2O@Cu-MOF-74 composite thin film showed a CH4 evolution rate 4.5 times higher than that of bare Cu2O under visible light illumination (>420 nm), with water vapor as the electron donor. Analysis results of electrochemical impedance spectroscopy, transient photocurrent measurements, and fluorescence spectroscopy collectively suggest that the decoration of Cu2O with Cu-MOF-74 facilitates electron extraction from excited Cu2O, thereby inducing long-lived photocharges for the reduction of CO2. This study provides insights into the modification of transition metal oxides for application in photocatalysis by coating the surface with metal-organic frameworks.</div>","PeriodicalId":100236,"journal":{"name":"ChemPhysMater","volume":"2 2","pages":"Pages 126-133"},"PeriodicalIF":0.0,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50199480","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Helianthus-annuus assisted synthesis of ZrO2 nanoparticles: Enhanced electrochemical, photoluminescent, and optical properties 向日葵辅助合成ZrO2纳米颗粒：增强的电化学、光致发光和光学性能

ChemPhysMater Pub Date : 2023-04-01 DOI: 10.1016/j.chphma.2022.08.002

Gurushantha Kariyanna , Surendra Boppanahalli Siddegowda , Anantharaju Kurupalya Shivram , Keshavamurthy Kempaiah

{"title":"Helianthus-annuus assisted synthesis of ZrO2 nanoparticles: Enhanced electrochemical, photoluminescent, and optical properties","authors":"Gurushantha Kariyanna , Surendra Boppanahalli Siddegowda , Anantharaju Kurupalya Shivram , Keshavamurthy Kempaiah","doi":"10.1016/j.chphma.2022.08.002","DOIUrl":"https://doi.org/10.1016/j.chphma.2022.08.002","url":null,"abstract":"<div>Cubic-phase ZrO2 nanoparticle (NPs) were synthesized using a cost-effective single-pot green combustion method and Helianthus annuus extract, and their properties were evaluated. Powder X-ray diffraction was used to investigate the purity, crystal structure, and size of the NPs, and the average size of the NPs was determined to be ∼ 25 nm. The internal surface morphology of the NPs with distinct voids and pores were observed using scanning electron microscopy (SEM) Ultraviolet–visible (UV-vis) absorption spectroscopy was used to analyze the optical properties of the as-synthesized ZrO2 NPs, and their energy bandgap was determined to be 4.5 eV. The photoluminescence (PL) spectrum of the cubic-phase ZrO2 NPs presented a broad band in the UV-vis region. The PL emission properties of the ZrO2 NPs were studied by analyzing their emission wavelength at ∼490 nm, and the results revealed that the NPs can be efficiently used for display applications. The electrochemical properties of a graphite–ZrO2 NP electrode was qualitatively analyzed by performing cyclic voltammetry (CV) and electrochemical impedance spectroscopy experiments in a three–electrode system with a 0.1 M KCl solution as the electrolyte. Our results suggested that the NPs can be used to evaluate the thermodynamics of the redox reaction, and their capacitance was determined using the CV curves of a graphite–ZrO2 working electrode at different scan rates in the range of 0.01 ∼ 0.05 V/s at room temperature. Furthermore, the photodegradation rate of Reactive Blue 4 textile dye over the as-prepared ZrO2 NPs reached 97% under UV-vis light irradiation.</div>","PeriodicalId":100236,"journal":{"name":"ChemPhysMater","volume":"2 2","pages":"Pages 148-154"},"PeriodicalIF":0.0,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50199483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

One-pot solvothermal synthesis of hierarchical Co-doped NiO microspheres with enhanced hydrogen sulfide sensing performances 具有增强硫化氢传感性能的分层共掺杂NiO微球的单锅溶剂热合成

ChemPhysMater Pub Date : 2023-04-01 DOI: 10.1016/j.chphma.2023.03.004

引用次数: 1

Metal-atom-doped W18O49 nanowires for electrocatalytic oxygen evolution reaction in alkaline medium 金属原子掺杂W18O49纳米线在碱性介质中的电催化析氧反应

ChemPhysMater Pub Date : 2023-04-01 DOI: 10.1016/j.chphma.2022.07.003

Liangbo Xie , Long Hai , Yuan Meng , Wenwen Zheng , Huapu Hu , Denghui Shang , Ke Shao , Cailing Zhang , Yi Li

{"title":"Metal-atom-doped W18O49 nanowires for electrocatalytic oxygen evolution reaction in alkaline medium","authors":"Liangbo Xie , Long Hai , Yuan Meng , Wenwen Zheng , Huapu Hu , Denghui Shang , Ke Shao , Cailing Zhang , Yi Li","doi":"10.1016/j.chphma.2022.07.003","DOIUrl":"https://doi.org/10.1016/j.chphma.2022.07.003","url":null,"abstract":"<div>Non-noble transition metal oxides (TMOs) are promising catalysts with improved catalytic activity and stability in oxygen evolution reaction (OER). However, the structural complexity of TMO-based electrocatalysts renders the determination of the active sites and OER mechanisms challenging. Here, we demonstrate that the OER activity of Co-doped one-dimensional W18O49 (Co-W18O49) is intrinsically dominated by the surface structure and electronic properties of the octahedral sites and Co–O–W bonds. Compared with RuO2 and W18O49 heterogeneous electrocatalysts, Co-W18O49 exhibits higher turnover frequency, attaining 1.97 s−1 at 500 mV overpotential. The results indicate that Co substitution contributes to the localized charge distribution of the active octahedral sites constructed by the Co–O–W bonds under OER conditions. Here, we determine the mechanism of TMOs for the OER, which may be applied to various other TMOs for OER electrocatalyst design.</div>","PeriodicalId":100236,"journal":{"name":"ChemPhysMater","volume":"2 2","pages":"Pages 141-147"},"PeriodicalIF":0.0,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50199482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Micro/nanomotor: A promising drug delivery system for cancer therapy 微/纳米电机：一种用于癌症治疗的有前景的药物输送系统

ChemPhysMater Pub Date : 2023-04-01 DOI: 10.1016/j.chphma.2022.07.002

Weihan Zhang, Zipeng Zhang, Shunli Fu, Qingping Ma, Yongjun Liu, Na Zhang

引用次数: 4

Electron beam evaporated gold doped tungsten oxide nanostructured films for sensor applications 用于传感器应用的电子束蒸镀金掺杂氧化钨纳米结构薄膜

ChemPhysMater Pub Date : 2023-04-01 DOI: 10.1016/j.chphma.2022.09.003

Adilakshmi Griddaluru, Sivasankar Reddy Akepati

引用次数: 1