Au-loaded mesoporous WO₃: Preparation and n-butanol sensing performances

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• 作者：Yinglin WangAuthor Vitae ; Bo ZhangAuthor Vitae ; Jie LiuAuthor Vitae ; Qiuyue YangAuthor Vitae ; Xiaobiao CuiAuthor Vitae ; Yuan Gao ; ^{gaoyuan@jlu.edu.cn" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Xiaohong ChuaiAuthor Vitae ; Fengmin LiuAuthor Vitae ; Peng SunAuthor Vitae ; Xishuang LiangAuthor Vitae ; Yanfeng SunAuthor Vitae ; Geyu Lu ; ^{lugy@jlu.edu.cn" class="auth_mail" title="E-mail the corresponding author}Author Vitae
• 关键词：WO3 ; KIT-6 ; Au ; Mesoporous ; n-Butanol
• 刊名：Sensors & Actuators: B. Chemical
• 出版年：2016
• 出版时间：29 November 2016
• 年：2016
• 卷：236
• 期：Complete
• 页码：67-76
• 全文大小：3613 K

文摘

Au-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-synthesized materials were deduced by X-ray diffraction (XRD), Brunauer-Emmet-Teller (BET), Transmission electron microscopy (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.