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Nano-Micro Letters 2024年第6期16卷 210-220页

作者： Hyeongtae Lim Hyeokjin Kwon Hongki Kang Jae Eun Jang Hyuk‑Jun Kwon Department of Electrical Engineering and Computer Science DGISTDaegu 42988South Korea Convergence Research Advanced Centre for Olfaction DGISTDaegu 42988South Korea

Advancements in sensor technology have significantly enhanced atmospheric ***,metal oxide and carbon(MO_(x)/C)hybrids have gained attention for their exceptional sensitivity and room-temperature sensing ***,previous methods of synthesizing MO_(x)/C composites suffer from problems,including inhomogeneity,aggregation,and challenges in ***,we introduce a refined method that employs a metal–organic framework(MOF)as a precursor combined with direct laser *** inherent structure of MOFs ensures a uniform distribution of metal ions and organic linkers,yielding homogeneous MO_(x)/C *** laser processing facilitates precise micropatterning(<2μm,comparable to typical photolithography)of the MO_(x)/C *** optimized MOF-derived MO_(x)/C sensor rapidly detected ethanol gas even at room temperature(105 and 18 s for response and recovery,respectively),with a broad range of sensing performance from 170 to 3,400 ppm and a high response value of up to 3,500%.Additionally,this sensor exhibited enhanced stability and thermal resilience compared to previous MOF-based *** research opens up promising avenues for practical applications in MOF-derived sensing devices.

关键词： metal-organic frameworks metal oxide Carbon composite Laser Gas sensor

Recent research progress on operational stability of metal oxide/sulfide photoanodes in photoelectrochemical cells

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Nano Research Energy 2022年第2期1卷 112-139页

作者： Linxing Meng Liang Li School of Physical Science and Technology Jiangsu Key Laboratory of Thin FilmsCenter for Energy Conversion Materials&Physics(CECMP)Soochow UniversitySuzhou 215006China

Photoelectrochemical(PEC)water splitting can directly convert solar energy into hydrogen energy for storage,effectively ending the energy crisis and solving environmental *** their modification by many researchers,photoanodes have rapidly improved in PEC ***,the poor stability of PEC water-splitting devices has not been effectively corrected,seriously hindering their practical application and large-scale *** this review,we provide a detailed introduction to the photocorrosion mechanism of photoanodes and characterizations of stability,summarizing the current research progress on the stability of metal oxide/sulfide photoanode *** to the specificity of each semiconductor,the corrosion mechanism and modification strategy of each photoanode are discussed in ***,we summarize the deficiencies in the current stability research and propose influencing factors and possible solutions that need to be considered in the photocorrosion research field of *** review can provide a reference for the stability research of photoanodes based on metal oxides and sulfides,especially for the design of efficient and stable metal sulfide-based photoanodes.

关键词： photoanode stability photocorrosion metal oxide metal sulfide

metal oxide Nanostructures from Simple metal-oxygen Reaction in Air

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Journal of Materials Science & Technology 2008年第4期24卷 597-602页

作者： Zexaing SHEN Division of Physics and Applied Physics School of Physical & Mathematical SciencesNanyang Technological UniversitySingapore 637371Singapore

metal oxide nanostructures （CuO, Co3O4, ZnO and α-Fe2O3） have been successfully fabricated by a simple and efficient method： heating the appropriate metals in air at low temperatures ranging from 200 to 400℃. The chemical composition, morphology and crystallinity of the nanostructures have been characterized by micro-Raman spectroscopy, X-ray diffraction, scanning electron microscopy and transmission electron microscopy. Two mechanisms： vapor-solid and surface diffusion play dominant roles in the growth of metal oxide nanostructures starting with low melting point metals （Zn and Cu） and high melting point metals （Fe and Co）, respectively. With sharp ends and large aspect ratio, the metal oxide nanostructures exhibit impressive field-induced electron emission properties, indicating their potentials as future electron source and displays. The water wettability and anti-wettability properties of iron oxide nanoflakes were also discussed in this work.

关键词： metal oxide Nanostructures Field emission Wettability

metal oxide/Nitrogen-Doped Carbon Catalysts Enables Highly Effi cient CO_(2) Electroreduction

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Transactions of Tianjin University 2021年第3期27卷 269-277页

作者： Han Shi Yingying Cheng Peng Kang School of Chemical Engineering and Technology Tianjin UniversityTianjin 300354China

The metal oxide/nitrogen-doped carbon(NC)compounds zirconium oxide/NC(ZrO_(2)/NC)and cerium oxide/NC(CeO_(2)/NC)were synthesized via the pyrolysis of polyaniline on the metal oxide *** characterization of the ZrO_(2)/NC and CeO_(2)/NC catalysts showed more active CO_(2) reduction reaction activity than that of NC catalyst without metal *** chromatography analysis revealed that CO and H_(2)were the primary products,and no liquid-phase products were detected via proton nuclear magnetic resonance spectroscopy or high-performance liquid *** maximum Faraday effi ciency of ZrO_(2)/NC reached 90%at−0.73 V(***),with the current density of CO at 5.5 mA/cm^(2);this Faraday effi ciency value was higher than that of NC(41%),with the current density of CO at 3.1 mA/cm^(2).The interaction between the metal oxide and carbon allowed the effi cient formation of defect sites,especially imine-type nitrogen,strengthening the adsorption of the key reaction intermediate CO_(2)^(•−) and thus promoting the CO_(2) reduction reaction.

关键词： metal oxide Nitrogen-doped carbon Interface eff ect CO_(2)reduction reaction

Low-temperature-processed metal oxide electron transport layers for efficient planar perovskite solar cells

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Rare metals 2021年第10期40卷 2730-2746页

作者： Jia-Xing Song Xin-Xing Yin Zai-Fang Li Yao-Wen Li China-Australia Institute for Advanced Materials and Manufacturing(IAMM) Jiaxing UniversityJiaxing 314001China Laboratory of Advanced Optoelectronic Materials College of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China

As a promising photovoltaic technology, perovskite solar cells(pero-SCs) have developed rapidly over the past few years and the highest power conversion efficiency is beyond 25%. Nowadays, the planar structure is universally popular in pero-SCs due to the simple processing technology and low-temperature *** transport layer(ETL) is verified to play a vital role in the device performance of planar pero-SCs. Particularly, the metal oxide(MO) ETL with low-cost, superb versatility, and excellent optoelectronic properties has been widely studied. This review mainly focuses on recent developments in the use of low-temperature-processed MO ETLs for planar pero-SCs. The optical and electronic properties of widely used MO materials of TiO_(2), ZnO, and SnO_(2), as well as the optimizations of these MO ETLs are briefly introduced. The commonly used methods for depositing MO ETLs are also discussed. Then, the applications of different MO ETLs on pero-SCs are ***, the challenge and future research of MO-based ETLs toward practical application of efficient planar peroSCs are proposed.

关键词： Perovskite solar cell Electron transport layer metal oxide Low temperature Planar

A highly alkaline-stable metal oxide@metal–organic framework composite for high-performance electrochemical energy storage

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National Science Review 2020年第2期7卷 305-314页

作者： Shasha Zheng Qing Li Huaiguo Xue Huan Pang Qiang Xu School of Chemistry and Chemical Engineering and Institute for Innovative Materials and Energy Yangzhou University AIST-Kyoto University Chemical Energy Materials Open Innovation Laboratory National Institute of Advanced Industrial Science and Technology

Most metal-organic frameworks(MOFs) hardly maintain their physical and chemical properties after exposure to alkaline aqueous solutions,thus precluding their use as potential electrode materials for electrochemical energy storage ***,we present the design and synthesis of a highly alkaline-stable metal oxide@MOF composite,CoOnanocube@Co-MOF(CoO@Co-MOF),via a controllable and facile one-pot hydrothermal method under highly alkaline *** obtained composite possesses exceptional alkaline stability,retaining its original structure in 3.0 M KOH for at least 15 *** from the exceptional alkaline stability,unique structure,and larger surface area,the CoO@Co-MOF composite shows a specific capacitance as high as 1020 F gat 0.5 A gand a high cycling stability with only 3.3% decay after 5000 cycles at 5 A *** as-constructed solid-state flexible device exhibits a maximum energy density of 21.6 mWh cm.

关键词： metal–organic framework metal oxide composite electrochemical energy storage flexible supercapacitor

Experimental Investigation of metal oxide Enhancing Thermal Physical Properties of Nylon 1010 Composites

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工程热物理学报 2013年第5期34卷 899-904页

作者： HAN Dongtai YANG Yong WANG Lijun School of Electric Power Engineering China University of Mining and Technology

By using Differential Scanning Caborimetry（DSC）,Thermogravimetric（TG） thermal analysis etc,we determined thermal physical properties,such as the heat conduction performance, specific heat capacity,heat stability and etc,of different metal oxide/Nylon 1010 *** results show that after added ZnO,CuO,Fe3O4 in PAlOlO matrix,the thermal conductivity of composites linear increases with the increasing of the quality score of metal *** using ZnO as thermal conductive filler and the particle diameter ranges 35 to 40μm,heat conduction performance of the modified composites is the *** thermal conductivity of ZnO/PA1010 composites linear increases with the temperature *** heat capacity of Nylon 1010 and all kinds of metal oxide/Nylon 1010 increases gradually with the temperature *** the same temperature,heat capacity of the modified composites reduces gradually with the content of metal oxide *** glass transition temperature of Nylon 1010 is about 47℃or so,and adding metal oxide can improve the thermal stability of composites.

关键词： metal oxide PA1010 heat-conducting property heat capacity thermal stability

Interface-modulated approach toward multilevel metal oxide nanotubes for lithium-ion batteries and oxygen reduction reaction

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Nano Research 2016年第8期9卷 2445-2457页

作者： Jiashen Meng Chaojiang Niu Xiong Liu Ziang Liu Hongliang Chen Xuanpeng Wang Jiantao Li Wei Chen Xuefeng Guo Liqiang Mai State Key Laboratory of Advcrnced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Center for Nanochemistry Beijing National Laboratory for Molecular Sciences State Key Laboratory for Structural Chemistry of Unstable and Stable Species College of Chemistry and Molecular Engineering Peking University Beijing 100871 China

metal oxide hollow structures with multilevel interiors are of great interest for potential applications such as catalysis, chemical sensing, drug delivery, and energy storage. However, the controlled synthesis of multilevel nanotubes remains a great challenge. Here we develop a facile interface-modulated approach toward the synthesis of complex metal oxide multilevel nanotubes with tunable interior structures through electrospinning followed by controlled heat treatment. This versatile strategy can be effectively applied to fabricate wire-in-tube and tube- in-tube nanotubes of various metal oxides. These multilevel nanotubes possess a large specific surface area, fast mass transport, good strain accommodation, and high packing density, which are advantageous for lithium-ion batteries （LIBs） and the oxygen reduction reaction （ORR）. Specifically, shrinkable CoMn204 tube-in-tube nanotubes as a lithium-ion battery anode deliver a high discharge capacity of -565 mAh-g-1 at a high rate of 2 A.g-~, maintaining 89% of the latter after 500 cycles. Further, as an oxygen reduction reaction catalyst, these nanotubes also exhibit excellent stability with about 92% current retention after 30,000 s, which is higher than that of commercial Pt/C （81%）. Therefore, this feasible method may push the rapid development of one-dimensional （1D） nanomaterials. These multifunctional nanotubes have great potential in many frontier fields.

关键词： interface-modulatedapproach multilevel nanotubes metal oxide lithium-ion battery (LIB~ ~ oxygen reduction reaction(ORR)

High performance metal oxide based sensing device using an electrode with a solid/liquid/air triphase interface

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Nano Research 2017年第9期10卷 2998-3004页

作者： Jun Zhang Xia Sheng Jian Jin Xinjian Feng Lei Jiang College of Chemistry Chemical Engineering and Materials Science Soochow University Suzhou 215123 China Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences Suzhou 215123 China School of Chemistry and Environment Beihang University Beijing 100191 China

The wetting properties of an electrode surface are of significant importance to the performance of electrochemical devices because electron transfer occurs at the electrode/electrolyte interface. Described in this paper is a low-cost metal oxide electrocatalyst (CuO)-based high-performance sensing device using an enzyme electrode with a solid/liquid/air triphase interface in which the oxygen level is constant and sufficiently high. We apply the sensing device to detect glucose, a model test analyte, and demonstrate a linear dynamic range up to 50 mM, which is about 25 times higher than that obtained using a traditional enzyme electrode with a solid/liquid diphase interface. Moreover, we show that sensing devices based on a triphase assaying interface are insensitive to the significant oxygen level fluctuation in the analyte solution.

关键词： superhydrophobicity triphase interface metal oxide electrocatalyst sensing device

Selective Oxidation of CO in Excess H_2 over Ru/Al_2O_3 Catalysts Modified with metal oxide

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Journal of Natural Gas Chemistry 2007年第4期16卷 409-414页

作者： Xirong Chen Hanbo Zou Shengzhou Chen Xinfa Dong Weiming Lin School of Chemical and Energy Engineering South China University of Technology Guangzhou 510651 Guangdong China School of Chemistry and Chemical Engineering Guangzhou University Guangzhou 510006 Guangdong China

The Ru/Al2O3 catalysts modified with metal oxide （K20 and La2O3） were prepared v/a incipient wetness impregnation method from ***2O mixed with nitrate loading on Al2O3 support. The activity of catalysts was evaluated under simulative conditions for the preferential oxidation of CO （CO-PROX） from the hydrogen-rich gas streams produced by reforming gas, and the performances of catalysts were investigated by XRD and TPR. The results showed that the activity temperature of the modified catalysts Ru-K20/Al2O3 and Ru-La2O3/Al2O3 were lowered approximately 30℃ compared with pure Ru/Al2O3, and the activity temperature range was widened. The conversion of CO on Ru-K20/Al2O3 and Ru-La2O3/Al2O3 was above 99% at 140-160℃, suitable to remove CO in a hydrogen-rich gas and the selectivity of Ru-La2O3/Al2O3 was higher than that of Ru-K2O/Al2O3in the active temperature range. Slight methanation reaction was detected at 220℃ and above.

关键词： hydrogen-rich gas ruthenium based catalysts CO removal selective oxidation metal oxide