Solvothermal synthesis of WO3 nanocrystals with nanosheet and nanorod morphologies and the gas-sensing properties

被引：20

作者：

Wang, Zishuai ^{[1
]}

Hu, Ming ^{[1
]}

Qin, Yuxiang ^{[1
]}

机构：

[1] Tianjin Univ, Sch Elect & Informat Engn, Tianjin 300072, Peoples R China

来源：

MATERIALS LETTERS | 2016年 / 171卷

基金：

中国国家自然科学基金;

关键词：

Semiconductors; Microstructure; Solvothermal synthesis; Sensors; NO2;

D O I：

10.1016/j.matlet.2016.02.040

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Tungsten oxide(WO3) nanocrystals have been synthesized successfully by a simple solvent-regulated solvothermal approach. The as-obtained sample was investigated by field emission scanning electron microscope (FESEM), X-ray diffraction (XRD) and transmission electron microscopy (TEM). The NO2-sensing properties of WO3 nanocrystals were also investigated. It was found that the sensor displayed excellent gas sensing properties to NO2 at the optimal operating temperature of 100 degrees C and behaved as an abnormal p-type semiconductor at near room temperature (RT). The response was about 28.3 and the response-recovery time was around 24 and 137 s for 1 ppm NO2, respectively, indicating that this structure could be a good candidate for gas sensors. In addition, the possible formation mechanism and gas sensing mechanism were proposed. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：146 / 149

页数：4

共 14 条

[1] Self-assembly of ZnO nanosheets into flower-like architectures and their gas sensing properties [J].

Chen, Xiaoshuang ;

Liu, Jingyuan ;

Jing, Xiaoyan ;

Wang, Jun ;

Song, Dalei ;

Liu, Lianhe .

MATERIALS LETTERS, 2013, 112 :23-25

[2] p- and n-type Fe-doped SnO2 gas sensors fabricated by the mechanochemical processing technique [J].

Galatsis, K ;

Cukrov, L ;

Wlodarski, W ;

McCormick, P ;

Kalantar-zadeh, K ;

Comini, E ;

Sberveglieri, G .

SENSORS AND ACTUATORS B-CHEMICAL, 2003, 93 (1-3) :562-565

[3] Nitrogen dioxide sensing properties of sprayed tungsten oxide thin film sensor: Effect of film thickness [J].

Ganbavle, V. V. ;

Mohite, S. V. ;

Agawane, G. L. ;

Kim, J. H. ;

Rajpure, K. Y. .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 2015, 451 :245-254

[4] Porous WO3 from anodized sputtered tungsten thin films for NO2 detection [J].

Hu, Ming ;

Zeng, Jing ;

Wang, Weidan ;

Chen, Huiqing ;

Qin, Yuxiang .

APPLIED SURFACE SCIENCE, 2011, 258 (03) :1062-1068

[5] Accidental releases of titanium tetrachloride (TiCl4) in the context of major hazards -: spill behaviour using REACTPOOL [J].

Kapias, T ;

Griffiths, RF .

JOURNAL OF HAZARDOUS MATERIALS, 2005, 119 (1-3) :41-52

[6]

Kar S., 2006, J APPL PHYS

[7] Room temperature NO2-sensing properties of Ti-added nonstoichiometric tungsten oxide nanowires [J].

Qin, Yuxiang ;

Sun, Xuebin ;

Li, Xiao ;

Hu, Ming .

SENSORS AND ACTUATORS B-CHEMICAL, 2012, 162 (01) :244-250

[8] Effect of annealing on microstructure and NO2-sensing properties of tungsten oxide nanowires synthesized by solvothermal method [J].

Qin, Yuxiang ;

Shen, Wanjiang ;

Li, Xiao ;

Hu, Ming .

SENSORS AND ACTUATORS B-CHEMICAL, 2011, 155 (02) :646-652

[9] Gas-kinetic interactions of nitrous oxides with SnO2 surfaces [J].

Ruhland, B ;

Becker, T ;

Muller, G .

SENSORS AND ACTUATORS B-CHEMICAL, 1998, 50 (01) :85-94

[10] GRAIN-SIZE EFFECTS IN TUNGSTEN OXIDE-BASED SENSOR FOR NITROGEN-OXIDES [J].

TAMAKI, J ;

ZHANG, Z ;

FUJIMORI, K ;

AKIYAMA, M ;

HARADA, T ;

MIURA, N ;

YAMAZOE, N .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1994, 141 (08) :2207-2210

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