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Nanocomposites Preparation and Its Application to sensor

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稀有金属材料与工程 2006年第A3期35卷 29-32页

作者： Dianqing Li Zhangfa Tong Xiaowei Huang Shouli Bai Ruixian Luo State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology Beijing 100029 China College of Chemistry and Chemical Engineering Guangxi University Nanning 530004 China Colloge of Biochemistry Engineering Beijing Union University Beijing 100023 China

The nanocomposites of ZnO-SnO_2 and In_2O_3-SnO_2 were prepared by wet chemical co-precipitation method as a novel semiconductor gas sensing materials for the detection of environmentally toxic *** preparation parameters were critical towards the grain size and crystallinity of the obtained *** results showed that these nanocomposites exhibited high sensitivity and selectivity for the detection of CO and NO_x,and the sensitivity depended on the composition of the composite,calcination temperature and operating *** gas sensing properties of the sensors were further improved through incorporation of dopants and surface *** gas sensing mechanism was also discussed by X-ray photoelectron spectroscopic (XPS) and temperature-programmed desorption (TPD) studies.

关键词： ZnO-SnO2 In2O3-SnO2 nanocomposites gas sensor sensing properties

Palladium CO sensor with Oscillatory Response

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稀有金属材料与工程 2006年第A3期35卷 194-196页

作者： L. Li W. Wlodarski S. Kandasamy D. B. Akolekar Z. G. Zhou School of Electrical ＆ Computer Engineering RMIT University Melbourne VIC 3001 Australia CRC for Microtechnology Hawthorn VIC 3122 Australia School of Applied Sciences RMIT University Melbourne VIC 3001 Australia State Key Lab of New Ceramics and Fine Processing Tsinghua University Beijing 100084 China

Oscillatory changes in resistivity of palladium coil based sensors were studied in the presence of carbon monoxide under constant operating *** in resistance were observed at operating temperature ranging from 100℃to 130℃.Both the period and the amplitude of the waveform increased with increasing CO *** is believed that oscillations occurred between two branches of a Langmuir-Hinshelwood reaction mechanism.

关键词： oscillation palladium carbon monoxide gas sensor

A carbon monoxide sensor based on single-walled carbon nanotubes doped with copper chloride

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Science China(Technological Sciences) 2013年第10期56卷 2576-2580页

作者： ZHANG GuangDi TAI HuiLing XIE GuangZhong JIANG YaDong ZHOU Yong State Key Laboratory of Electronic Thin Films and Integrated Devices School of Optoelectronic Information University of Electronic Science and Technology of China (UESTC)

A carbon monoxide gas sensor based on single-walled carbon nanotube （SWCNT） has been developed for detection of carbon monoxide （CO） at room temperature. Copper chloride （CuC1） was mixed with SWNT by mechanical blending. The thin film was deposited on interdigitated electrodes by using airbrush technology. This paper described the fabrication of the sensor for detecting carbon monoxide with concentrations from 20 ppm to 100 ppm. The performance of CO gas sensor was measured by using relevant apparatus to obtain the continuous sensor electric resistance change on exposure to CO and air atmosphere at room temperature, respectively. The results exhibited that the senor presented a larger sensitivity and a good recoverability. The experimental results suggested the potential use of CuC1 doped SWCNT for CO detecting.

关键词： carbon monoxide gas sensor single-walled carbon nanotubes copper chloride room temperature

Flexible fabric gas sensors based on PANI/WO3 p−n heterojunction for high performance NH3 detection at room temperature

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Science China Materials 2020年第10期63卷 2028-2039页

作者： Meng He Lili Xie Guifang Luo Zhanhong Li James Wright Zhigang Zhu School of Medical Instrument and Food Engineering University of Shanghai for Science and TechnologyShanghai 200093China School of Environmental and Materials Engineering Shanghai Polytechnic University2360 Jinhai RoadShanghai 201209China Department of Electronic Engineering School of EngineeringTechnological University DublinTallaghtDublin 24Ireland

A PANI/WO3@cotton thread-based flexible sensor that is capable of detecting NH3 at room temperature is developed here.A layer of WO3 with PANI nanoparticles can be deposited by in-situ *** morphology and structure of the specimens were investigated by utilizing TEM,SEM,XRD and *** sensing performance of the PANI/WO3@cotton sensors with different WO3 molar ratios to NH3 at room temperature was *** results show that the optimal sensor(10 mol%WO3)has a response of 6.0 to 100 ppm NH3,which is significantly higher than that of the sensors based on pristine PANI and other *** PANI/WO3@cotton sensor also displays excellent selectivity,gas response,and flexibility even at room *** unique fiber structure,p-n heterojunction,and the increased protonation of PANI in the composites contribute to the enhanced sensing property.

关键词： gas sensor PANI/WO3 cotton thread p-n heterojunction NH3 detection

Nanocomposites Preparation and Its Application to sensor

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稀有金属材料与工程 2006年第S3期 29-32页

作者： Dianqing Li~1 Zhangfa Tong~2 Xiaowei Huang~3 Shouli Bai~1 Ruixian Luo~1 (1.State Key Laboratory of Chemical Resource Engineering,Beijing University of Chemical Technology,Beijing 100029,China) (2.College of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China) (3.Colloge of Biochemistry Engineering,Beijing Union University,Beijing 100023,China)

The nanocomposites of ZnO-SnO2and In2O3-SnO2were prepared by wet chemical co-precipitation method as a novel semiconductor gas sensing materials for the detection of environmentally toxic *** preparation parameters were critical towards the grain size and crystallinity of the obtained *** results showed that these nanocomposites exhibited high sensitivity and selectivity for the detection of CO and NOx,and the sensitivity depended on the composition of the composite,calcination temperature and operating *** gas sensing properties of the sensors were further improved through incorporation of dopants and surface *** gas sensing mechanism was also discussed by X-ray photoelectron spectroscopic （XPS） and temperature-programmed desorption （TPD） studies.

关键词： ZnO-SnO2 In2O3-SnO2 nanocomposites gas sensor sensing properties

gasoline sensor Based on Flower-Like ZnO

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稀有金属材料与工程 2006年第S3期 106-109页

作者： Xu Jiaqiang~(1,2) Chen Yuping~1 Li Chao~1 Shen Jianian~2 (1.College of Materials and Chemical Engineering,Zhengzhou University of Light Industry,Zhengzhou 450002,China) (2.Institute of Materials,Shanghai University,Shanghai 200072,China)

Flower-like ZnO was prepared through a hydrothermal process using zinc sulfate as raw *** microstructure and morphology of the samples were characterized by X-ray diffraction （XRD） and transmission electron microscopy （TEM）.XRD results showed that the as-obtained sample could be indexed to hexagonal wurtzite *** results revealed that the ZnO sample presented flower-like *** gas sensors were prepared with the traditional sintering process and their gas sensitivities were *** gas sensitivity results showed that the sensors based on flower-like ZnO were very sensitive to dilute 90#*** relatively high sensitivity and selectivity of these sensors made from flower-like ZnO demonstrated the potential for developing a new class of selective gasoline sensors.

关键词： hydrothermal process gas sensor zinc oxide gasoline

Palladium CO sensor with Oscillatory Response

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稀有金属材料与工程 2006年第S3期 194-196页

作者： W.Wlodarskil S.Kandasamy D.B.Akolekar School of Electrical & Computer Engineering RMIT UniversityMelbourne VIC 3001Australia CRC for Microtechnology HawthornVIC 3122Australia School of Applied Sciences RMIT UniversityMelbourne VIC 3001Australia

关键词： oscillation palladium carbon monoxide gas sensor

Hierarchical flower-like NiFe2O4 with core-shell structure for excellent toluene detection

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Rare Metals 2021年第6期40卷 1578-1587页

作者： Yan-Lin Zhang Chao-Wei Jia Ruo-Nan Tian Hong-Tao Guan Gang Chen Cheng-Jun Dong School of Materials and Energy Yunnan UniversityKunming 650091China

The extensive use of toluene stimulates the effective detection by sensitive gas sensors based on unique ***,hierarchical flower-like NiFe_(2)O_(4) with core-shell architecture was synthesized by a facile hydrothermal method in the presence of urea and NH4 *** controllable experiments indicated that the burr spheres and football-like samples were produced with individual urea or NH4 *** flower-like NiFe_(2)O_(4) sensor exhibited outstanding sensitivity of 19.95 to 100×10^(-6) toluene with low detection limit(1×10^(-6)).Furthermore,the sensor showed superior sensing selectivity and longterm stability to *** excellent sensing properties could largely arise from a combination of high surface area,numerous active sites,porous structures,and the native catalytic characteristics of NiFe2 O4 to facilitate toluene molecules adsorption,diffusion,and reaction.

关键词： Hierarchical NiFe2O4 Core-shell gas sensor Toluene

Environmental Analysis with 2D Transition-Metal Dichalcogenide-Based Field-Effect Transistors

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Nano-Micro Letters 2020年第8期12卷 1-24页

作者： Xiaoyan Chen Chengbin Liu Shun Mao Biomedical Multidisciplinary Innovation Research Institute Shanghai East HospitalState Key Laboratory of Pollution Control and Resource ReuseCollege of Environmental Science and EngineeringTongji University1239 Siping RoadShanghai 200092People’s Republic of China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092People’s Republic of China Department of Materials Science and Engineering Johns Hopkins University3400 N.Charles St.BaltimoreUSA

Field-effect transistors(FETs)present highly sensitive,rapid,and in situ detection capability in chemical and biological ***,two-dimensional(2D)transition-metal dichalcogenides(TMDCs)attract significant attention as FET channel due to their unique structures and outstanding *** the booming of studies on TMDC FETs,we aim to give a timely review on TMDCbased FET sensors for environmental analysis in different ***,theoretical basics on TMDC and FET sensor are ***,recent advances of TMDC FET sensor for pollutant detection in gaseous and aqueous media are,respectively,*** last,future perspectives and challenges in practical application and commercialization are given for TMDC FET *** article provides an overview on TMDC sensors for a wide variety of analytes with an emphasize on the increasing demand of advanced sensing technologies in environmental analysis.

关键词： Environmental analysis Two-dimensional transition-metal dichalcogenide Field-effect transistor gas sensor Biosensor