Hierarchical flower-like WO3 nanostructures and their gas sensing properties

被引：107

作者：

Wang, Chong ^{[1
]}

Sun, Ruize ^{[1
]}

Li, Xin ^{[1
]}

Sun, Yanfeng ^{[1
]}

Sun, Peng ^{[1
]}

Liu, Fengmin ^{[1
]}

Lu, Geyu ^{[1
]}

机构：

[1] Jilin Univ, Coll Elect Sci & Engn, State Key Lab Integrated Optoelect, Changchun 130012, Peoples R China

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2014年 / 204卷

关键词：

WO3; Hierarchical nanostructure; Flower-like; NO2; sensor; TUNGSTEN-OXIDE; GROWTH; NO2; MORPHOLOGY; PARTICLES; NANOWIRES; SENSOR; NUCLEATION; EFFICIENCY; TIO2;

D O I：

10.1016/j.snb.2014.07.083

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Flower-like WO3 composed of nanosheets were successfully synthesized by calcining the acid-treated hydrothermal precursor. Field emission scanning electron microscopy and transmission electron microscopy results reveal that the flower-like WO3 are assembled by a number of irregular-shaped nanosheets, which are cross-linked in the interior of the microflower. A possible formation mechanism is proposed on the basis of the results of time-dependent experiments. Moreover, the gas sensing properties of the obtained flower-like nanostructured WO3 were investigated. It is found that the sensor based on the flower-like WO3 nanostructure exhibits good selectivity and high response to NO2, and the detection limit is about 2 ppb. (C) 2014 Elsevier B.V All rights reserved.

引用

页码：224 / 230

页数：7

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