期刊
JOURNAL OF MATERIALS CHEMISTRY
卷 22, 期 15, 页码 7232-7238出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2jm15742j
关键词
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资金
- NSFC
- Beijing Natural Science Foundation
- 973 Program [2011CBA00503, 2011CB932403]
Sea urchin-like Ag-alpha-Fe2O3 nanocomposite microspheres are developed for gas sensing applications. Such hierarchical nanostructures were synthesized by a two step approach including a hydrothermal reaction and a subsequent incipient wetness impregnation process. The large Brunauer-Emmett-Teller (BET) area and highly porous structure of the hierarchical architecture and the chemical and electronic sensitization effect of Ag nanoparticles endow the Ag-alpha-Fe2O3 nanocomposite microspheres with enhanced gas-sensing properties in comparison to pristine alpha-Fe2O3 sensors. The possible formation mechanism of the sea urchin-like nanostructures, and their sensing mechanism are discussed.
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