水热法制备掺杂钇的二氧化钛及其对甲醛气敏性能研究
Study on Synthesis of TiO2 Doped with Yttrium by Hydrothermal Method and the Gas Sensing Properties towards Formaldehyde

作者: 宋金玲 * , 蔡 颖 , 张 胤 :内蒙古科技大学稀土学院,包头;内蒙古科技大学,内蒙古自治区白云鄂博矿多金属资源综合利用重点实验室,省部共建国家重点实验室培养基地,包头; 凡庆南 :内蒙古科技大学稀土学院,包头; 周长才 :内蒙古中煤蒙大新能源化工基地开发有限公司,鄂尔多斯;

关键词: 水热法TiO2TiO2:YXRD气敏性能Hydrothermal method TiO2 TiO2:Y XRD Gas Sensing Properties

摘要:
本文首先通过溶凝胶法和水热法制备了TiO2粉末和掺杂稀土离子YTiO2粉末,并通过X-射线衍射谱(XRD)对制备的样品结构进行了表征,结果表明,制备的TiO2粉末为锐钛矿结构;稀土离子的掺杂抑制了TiO2晶粒生长。其次通过气敏测试仪测试所制备的样品对甲醛的气敏性,结果发现水热法制备的掺杂YTiO2(TiO2:Y-HT)对甲醛有较高的灵敏性。并进一步研究了该样品对甲醛浓度的敏感性、响应恢复时间以及在不同温度下的敏感性,结果显示,最佳操作温度为250,随着浓度的增加呈现增加的趋势,响应时间约为30 s,恢复时间约为35 s

In this paper, the TiO
2 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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