Mesoporous assembled SnO₂ nanospheres: Controlled synthesis, structural analysis and ethanol sensing investigation

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• 作者：Yun KuangAuthor Vitae ; Guobing ChenAuthor Vitae ; Xiaodong LeiAuthor Vitae ; Liang Luo ; ^{luoliang@mail.buct.edu.cn}Author Vitae ; Xiaoming Sun ; ^{sunxm@mail.buct.edu.cn}Author Vitae
• 关键词：Tin dioxide ; Nanosphere ; Assembly ; Mesoporous ; Gas sensing
• 刊名：Sensors and Actuators B: Chemical
• 出版年：2013
• 出版时间：May, 2013
• 年：2013
• 卷：181
• 期：Complete
• 页码：629-636
• 全文大小：2012 K

文摘

A series of mesoporous SnO₂ nanospheres were prepared in ethanol/water mixed solvents with pore-forming surfactant (CTAB) involved. Surprisingly, the nanospheres assembled from SnO₂ nanocones exhibited higher sensitivity to ethanol than hollow and amorphous-core counterparts, and more importantly, such submicrometer-sized spheres all showed linear responses to external ethanol concentration, similar to those extremely small spheres. Careful structure characterizations revealed their inner structure and crystallization behavior differences. It was finally concluded that the growth model difference significantly affected the inner structures (or assembly fashions) of these nanospheres, and consequently determined their sensing performances.