Microwave assisted synthesis of hierarchical Pd/SnO₂ nanostructures for CO gas sensor

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• 作者：Qingji Wang^aAuthor Vitae ; Chen Wang^bAuthor Vitae ; Hongbin Sun^bAuthor Vitae ; Peng Sun^bAuthor Vitae ; Yongzhi Wang^aAuthor Vitae ; Jun Lin^a ; Author Vitae ; Geyu Lu^b ; ^{lugy@jlu.edu.cn" class="auth_mail" title="E-mail the corresponding author}Author Vitae
• 关键词：Microwave-assisted hydrothermal method ; SnO2 ; Pd-loaded ; CO sensor
• 刊名：Sensors & Actuators: B. Chemical
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：222
• 期：Complete
• 页码：257-263
• 全文大小：2848 K

文摘

In this paper, we present a facile one-step microwave assisted hydrothermal route for the synthesis of the unloaded and Pd-loaded SnO₂ nanostructures. The Pd was grown in situ on the SnO₂ nanostructure, constructing Pd/SnO₂. A gas sensor based on the as-prepared Pd/SnO₂ was fabricated and tested for response to carbon monoxide gas. The results indicated that the sensor using 3.0 wt% Pd-loaded SnO₂ to 100 ppm carbon monoxide performed a superior sensing properties compared to 0 wt%, 1.5 wt%, and 4.5 wt% Pd-loaded samples at a relatively low temperature (100 °C). Such enhanced gas sensing performances could be attributed to both the contribution of Pd-loaded and the in situ method. In addition, the one-step in situ microwave assisted loading process provides a promising and versatile choice for the preparation of gas sensing materials.