期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 236, 期 -, 页码 67-76出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2016.05.097
关键词
WO3; KIT-6; Au; Mesoporous; n-Butanol
资金
- National Nature Science Foundation of China [61304242, 61327804, 61520106003, 61377058, 61374218]
- National High-Tech Research and Development Program of China (863 Program) [2014AA06A505]
- China Postdoctoral Science Foundation [2013M530979]
- Science and Technology Development Program of Jilin Province [20150520091JH]
An loaded mesoporous WO3 was synthesized by nanocasting method. Mesoporous structure provided a large specific surface area, and the noble metal (Au) improved the catalytic efficiency. The above two characteristics played crucial roles in enhancing the performance of the gas sensors. The as-synthesizedmaterials were deduced by X-ray diffraction (XRD), Brunauer-Emmet-Teller (BET), Transmission electronmicroscopy (TEM) and X-ray photoelectron spectroscopy (XPS). The obtained materials showed ordered mesoporous structure with excellent crystallinity and the pore size was about 10.8 nm which matched with Barrett-Joyner-Halenda analysis. Static test system was employed to measure volatile organic compounds (VOCs) (such as methanol, ethanol, isopropanol and n-butanol) sensing properties for the sensors using mesoporous WO3 and different weight ratios of Au-loaded (0.2%, 0.5% and 1.0%) mesoporous WO3. The sensors loaded with Au exhibited much higher sensitivity and selectivity to n-butanol in this work. Furthermore, Au-loaded materials showed lower operating temperature. (C) 2016 Elsevier B.V. All rights reserved.
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