Journal
NANOSCALE RESEARCH LETTERS
Volume 13, Issue -, Pages -Publisher
SPRINGEROPEN
DOI: 10.1186/s11671-018-2434-4
Keywords
Evaporation-induced self-assembly (EISA) method; Mesoporous tin oxide; Semiconductor gas sensor; Gas-sensing properties
Funding
- National Natural Science Foundation of China [51704030]
- China Postdoctoral Science Foundation [2017 M610617, 2017 M623182]
- Shaanxi Postdoctoral Science Foundation [2017BSHEDZZ10]
- Special Fund for Basic Science Research of Central Colleges of Chang'an University [310831171002]
- Training Program of Innovationand Entrepreneurship for Undergraduates [201710710273]
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Wormhole-like mesoporous tin oxide was synthesized via a facile evaporation-induced self-assembly (EISA) method, and the gas-sensing properties were evaluated for different target gases. The effect of calcination temperature on gas-sensing properties of mesoporous tin oxide was investigated. The results demonstrate that the mesoporous tin oxide sensor calcined at 400 degrees C exhibits remarkable selectivity to ethanol vapors comparison with other target gases and has a good performance in the operating temperature and response/recovery time. This might be attributed to their high specific surface area and porous structure, which can provide more active sites and generate more chemisorbed oxygen spices to promote the diffusion and adsorption of gas molecules on the surface of the gas-sensing material. A possible formation mechanism of the mesoporous tin oxide and the enhanced gas-sensing mechanism are proposed. The mesoporous tin oxide shows prospective detecting application in the gas sensor fields.
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