Li Xiaoyu, Peng Kang, Dou Yewei, Chen Jiasheng, Zhang Yue, An Gai
School of Materials Science and Engineering, Chang'an University, Xi'an, 710064, China.
State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, China.
Nanoscale Res Lett. 2018 Jan 11;13(1):14. doi: 10.1186/s11671-018-2434-4.
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 °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.
通过简便的蒸发诱导自组装（EISA）方法合成了虫洞状介孔氧化锡，并对不同目标气体的气敏性能进行了评估。研究了煅烧温度对介孔氧化锡气敏性能的影响。结果表明，在400℃煅烧的介孔氧化锡传感器与其他目标气体相比，对乙醇蒸气具有显著的选择性，并且在工作温度和响应/恢复时间方面具有良好的性能。这可能归因于其高比表面积和多孔结构，它们可以提供更多的活性位点并产生更多的化学吸附氧物种，以促进气体分子在气敏材料表面的扩散和吸附。提出了介孔氧化锡可能的形成机理和增强的气敏机理。介孔氧化锡在气体传感器领域显示出潜在的检测应用前景。
