Effect of Ti-doped and annealing on structure and gas-sensing properties of WO3 nanocrystals prepared by hydrothermal method

被引：0

作者：

Feng, Yuan-Yuan ^{[1
]}

Yang, Xiao-Hong ^{[1
]}

Zuo, Jia-Qi ^{[1
]}

Wang, Chang-Yuan ^{[1
]}

Wang, Wei ^{[1
]}

Ma, Yong ^{[1
]}

机构：

[1] School of Physics & Electronic Engineering, Chongqing Normal University, Chongqing

来源：

Gongneng Cailiao/Journal of Functional Materials | 2015年 / 46卷 / 04期

关键词：

Annealing; Gas-sensing; Hydrothermal method; Ti-doped; Tungsten trioxide;

D O I：

10.3969/j.issn.1001-9731.2015.04.019

中图分类号：

学科分类号：

摘要：

Ti-doped WO3 nanocrystals with different Ti-doped concentrations are synthesized by hydrothermal method, and annealed at 350℃ for 1 h. Morphology and structure of these materials have been characterized by the scanning electron microscopy and X-ray diffraction instrument, the gas-sensing properties to nitrogen dioxide at 200℃ of film sensors made of the unannealed and annealed materials are studied. The results show that Ti-doped can effectively inhibit the growth of nanocrystals, reduce the size of nanocrystals; the crystalline phase of these materials have changed after annealed, the size of nanocrystals is further reduced, the dispersion of nanocrystals becomes better. The tests of the film sensors show that the amount of Ti-doped and annealing can improve the sensitivity of sensors to NO2, the film sensor made of the annealed Ti-doped for 2% has a maximum sensitivity of 15. 38 and a good reproducibility and stability, the response and recovery time is 2.2 and 1.5 min, respectively. ©, 2015, Journal of Functional Materials. All right reserved.

引用

页码：04096 / 04101

页数：5

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