Near room temperature CO sensing by mesoporous LaCoO₃ nanowires functionalized with Pd nanodots

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• 作者：Jun-Chao DingAuthor Vitae ; Hua-Yao LiAuthor Vitae ; Ze-Xing CaiAuthor Vitae ; Xiao-Xue WangAuthor Vitae ; Xin Guo ; ^{xguo@hust.edu.cn" class="auth_mail" title="E-mail the corresponding author}Author Vitae
• 关键词：LaCoO3 ; CO sensors ; Nanowires ; Pd nanodots ; Low temperature
• 刊名：Sensors & Actuators: B. Chemical
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：222
• 期：Complete
• 页码：517-524
• 全文大小：2996 K

文摘

Mesoporous LaCoO₃ nanowires with diameters of 200–800 nm and grain sizes of 30–60 nm were prepared by electrospinning, and functionalized with Pd nanodots. The Pd-functionalized LaCoO₃ mesoporous nanowires demonstrate excellent CO sensing characteristics at low temperatures: the Pd-LaCoO₃ nanowires show reliable dynamic response-and-recovery to different CO concentrations at a temperature as low as 60 °C, and at 250 °C the Pd-LaCoO₃ nanowires achieve a high response of ∼113.6 to 100 ppm CO. The excellent CO sensing properties of the Pd-LaCoO₃ nanowires at low temperatures can be ascribed to the mesoporous nanostructure and the catalytic sensitization by the Pd nanodots.