Combustion synthesized hierarchically porous WO3 for selective acetone sensing

被引：28
|
作者：
Dong, Chengjun [1 ]
Liu, Xu [1 ]
Guan, Hongtao [1 ]
Chen, Gang [1 ]
Xiao, Xuechun [1 ]
Djerdj, Igor [2 ]
Wang, Yude [1 ,3 ]
机构：
[1] Yunnan Univ, Dept Mat Sci & Engn, Kunming 650091, Peoples R China
[2] Rudjer Boskovic Inst, Bijenicka 54, Zagreb 10000, Croatia
[3] Yunnan Univ, Yunnan Prov Key Lab Miconano Mat & Technol, Kunming 650091, Peoples R China
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2016年 / 184卷
基金：
中国国家自然科学基金;
关键词：
Oxides; Chemical synthesis; Electron microscopy; X-ray photo-emission spectroscopy; TUNGSTEN; NANOSTRUCTURES; NANOFIBERS; DIAGNOSIS;
D O I：
10.1016/j.matchemphys.2016.09.036
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
An easy, inexpensive combustion route was designed to synthesize hierarchically porous WO3. The tungsten source was fresh peroxiotungstic acid by dissolving tungsten powder into hydrogen peroxide. To promote the combustion reaction, a combined fuel of both glycine and hydrazine hydrate was used. The microstructure was well-connected pores comprised of subunit nanoparticles. Upon exposing towards acetone gas, the porous WO3 based sensor exhibits high gas response, rapid response and recovery, and good selectivity in the range of 5-1000 ppm under working temperature of 300 degrees C. This excellent sensing performance was plausibly attributed to the porous morphology, which hence provides more active sites for the gas molecules' reaction. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：155 / 161
页数：7
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