Preparation of Ag-loaded mesoporous WO₃ and its enhanced NO₂ sensing performance

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• 作者：Yinglin WangAuthor Vitae ; Xiaobiao CuiAuthor Vitae ; Qiuyue YangAuthor Vitae ; Jie LiuAuthor Vitae ; Yuan Gaop> ; p>p>gaoyuan@jlu.edu.cn" class="auth_mail" title="E-mail the corresponding authorp>Author Vitae ; Peng SunAuthor Vitae ; Geyu Lup> ; p>p>lugy@jlu.edu.cn" class="auth_mail" title="E-mail the corresponding authorp>Author Vitae
• 关键词：WO3 ; Ag ; KIT-6 ; Mesoporous ; Gas sensor
• 刊名：Sensors & Actuators: B. Chemical
• 出版年：2016
• 出版时间：31 March 2016
• 年：2016
• 卷：225
• 期：Complete
• 页码：544-552
• 全文大小：3356 K

文摘

Ordered mesoporous WO₃ and Ag-loaded mesoporous WO₃ have been synthesized by using three-dimensional cubic KIT-6 as a hard template. A series of material characterization methods were employed to characterize the as-synthesized materials above and gas sensing properties were measured. It showed that the as-obtained ordered mesoporous structure materials have excellent crystallite and the pore sizes were about 9 nm which matched with the result of BET results. Furthermore, the NO₂ sensing properties of the sensors based on mesoporous WO₃ and different molar ratios of Ag-loaded (0.2%, 0.5% and 1.0%) mesoporous WO₃ were detected by utilizing a static test system, respectively. The sensor using 0.5% Ag-loaded mesoporous WO₃ exhibited much higher response, shorter response and recovery time and excellent selectivity to NO₂ comparing with the sensors those based on other Ag-loaded ratio mesoporous WO₃ and the pure mesoporous WO₃.