NH₃ gas sensing performance enhanced by Pt-loaded on mesoporous WO₃

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• 作者：Yinglin Wang^a ; ^bAuthor Vitae ; Jie Liu^bAuthor Vitae ; Xiaobiao Cui^bAuthor Vitae ; Yuan Gao^b ; ^{gaoyuan@jlu.edu.cn" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Jian Ma^bAuthor Vitae ; Yanfeng Sun^bAuthor Vitae ; Peng Sun^bAuthor Vitae ; Fengmin Liu^b ; Xishuang Liang^bAuthor Vitae ; Tong Zhang^bAuthor Vitae ; Geyu Lu^a ; ^b ; ^{lugy@jlu.edu.cn" class="auth_mail" title="E-mail the corresponding author}Author Vitae
• 关键词：Pt ; WO3 ; Hard template ; Mesoporous ; Ammonia
• 刊名：Sensors & Actuators: B. Chemical
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：238
• 期：Complete
• 页码：473-481
• 全文大小：3186 K

文摘

Pt-loaded mesoporous WO₃ was fabricated by nanocasting method. Mesoporous structure provided ordered tunnel which was convenient for gas diffusion and the large specific surface area which could offer more active sites. The noble metal (Pt) improved the catalytic efficiency which played crucial role in enhancing the performance of the gas sensor. The obtained materials were characterized by X-ray diffraction (XRD), Brunauer-Emmet-Teller (BET), Transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). Characterization indicated that the synthesized materials had ordered mesoporous structure with excellent crystallinity and the pore size was about 10.6 nm. Static test system was employed to measure ammonia sensing properties for the as-prepared samples. The sensor based on Pt-loaded WO₃ presented higher sensitivity, quicker response-recovery rates, excellent repeatability and selectivity. It indicated that the Pt-loaded mesoporous WO₃ was a potential ammonia gas sensor material.