WO_3纳米材料气敏性能研究进展

The Research on WO_3 Nano-Materials' Gas-Sensing

作为n型半导体的WO3是一种优良的气敏材料,对NOX、H2S、H2、CH4、C2H5OH、CO、NH3等气体都有良好的敏感性。目前WO3气敏材料已经基本满足社会应用的要求,但有些指标还有待改善。本文综述了WO3纳米材料气敏性能的研究进展,介绍了n型半导体WO3纳米材料的气敏传感机制,以及通过形貌控制等手段提高气敏性能、掺杂WO3纳米材料气敏性能及其复合气敏材料气敏性能的研究进展情况。作者认为WO3纳米材料在提高灵敏度、降低工作温度,特别是提高选择性和稳定性上还有很大的研究空间,并且还需克服制备的高成本,探索简易而且重复性强的制备工艺,以便更早地应用于商业化生产,为社会生产生活服务。

As a N-type semiconductor, WO3 has excellent gas sensitivity to NOx , H2 S, H2 , CH4 , C2 H5 OH, CO and NH3. At present, WO3, as gas-sensing material , has almost sufficed for application of society, but some capabilities would still be improved . In this paper, the gas sensing mechanism has been introduced. The melioration of gas-sensing capability of the WO3 nano-materials whose shape was controlled and the WO3 doped and nano-composited has been summarized. Some opinion of the future research trend of WO3 was proposed. There is a great study space, such as increased sensitivity and lower operating temperatures, especially to improve the selectivity and stability. Preparation of WO3 nano-materials need to overcome the high cost, simple and repetitive exploration of the preparation process, so that earlier used in commercial production, production and living services for the community.