Preparation and Gas Sensing Properties of Hierarchical Flower-Shaped Bi2WO6
Jingkun Xiao A , Chengwen Song A B , Wei Dong A , Yanyan Yin A and Chen Li A
+ Author Affiliations
- Author Affiliations
A College of Environment Science and Engineering, Dalian Maritime University, 1 Linghai Road, Dalian 116026, China.
B Corresponding author. Email: chengwensong@dlmu.edu.cn
Australian Journal of Chemistry 69(1) 107-111 https://doi.org/10.1071/CH15152
Submitted: 31 March 2015 Accepted: 22 June 2015 Published: 17 July 2015
Abstract
Hierarchical flower-shaped Bi2WO6 was obtained by a simple hydrothermal method. Morphology and structure of the Bi2WO6 were characterised by single electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and N2 adsorption techniques. Gas sensing properties of the Bi2WO6 sensor were investigated by a static gas-sensing system. The results show the as-synthesised flower-shaped product is pure orthorhombic Bi2WO6, which is composed of nanosheets with ~10–20 nm in thickness and hundreds of nanometres in planar size. At this optimal operating temperature of 300°C, the Bi2WO6 sensor exhibits ultra-fast response (1-2 s) and fast recovery time (6–12 s) towards ethanol detection, and high selectivity to other gases such as methanol, benzene, dichloromethane, and hexane.
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