Hierarchical Assembly of 伪-Fe2O3 Nanosheets on SnO2 Hollow Nanospheres with Enhanced Ethanol Sensing Properties

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• 作者：Peng Sun ; Chen Wang ; Jiangyang Liu ; Xin Zhou ; Xiaowei Li ; Xiaolong Hu ; Geyu Lu
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：September 2, 2015
• 年：2015
• 卷：7
• 期：34
• 页码：19119-19125
• 全文大小：473K
• ISSN：1944-8252

文摘

We present the preparation of a hierarchical nanoheterostructure consisting of inner SnO₂ hollow spheres (SHS) surrounded by an outer 伪-Fe₂O₃ nanosheet (FNS). Deposition of the FNS on the SHS outer surface was achieved by a facile microwave hydrothermal reaction to generate a double-shell SHS@FNS nanostructure. Such a composite with novel heterostructure acted as a sensing material for gas sensors. Significantly, the hierarchical composites exhibit excellent sensing performance toward ethanol, which is superior to the single component (SHS), mainly because of the synergistic effect and heterojunction.