Study on Synthesis of TiO2 Doped with Yttrium by Hydrothermal Method and the Gas Sensing Properties towards Formaldehyde
In this paper, the TiO2 powder and TiO2 powders doped with yttrium ion have been prepared by the sol-gel method and hydrothermal methods, and the structures of the samples have been characterized by the XRD. The results of XRD indicate that the structure of prepared TiO2 powder is anatase and rare earth ion doping agents can restrain the growth of TiO2 crystals. Moreover, the formaldehyde gas sensing properties of the prepared samples have been measured by the gas sensing instrument. The results show that the TiO2 doped with Y and prepared by hydrothermal method (TiO2:Y-HT) exhibits better sensitivity towards formaldehyde. The concentration-sensitivity, response-recovery time and temperature-sensitivity of TiO2:Y-HT have been furthermore studied. The results indicate that the best operation temperature is 250˚C, the sensitivity increases with the increasing of formaldehyde concentration, the response time is about 30 s, and the recovery time is about 35 s.
文章引用: 宋金玲 , 凡庆南 , 周长才 , 蔡 颖 , 张 胤 (2013) 水热法制备掺杂钇的二氧化钛及其对甲醛气敏性能研究。 纳米技术， 3， 53-57. doi: 10.12677/NAT.2013.34008
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