普通金红石型TiO₂粉末的过渡晶体及其声催化活性研究
Investigation on transition crystal of ordinary rutile TiO2 powder and its sonocatalytic activity.
作者信息
Wang Jun, Ma Teng, Zhang Zhaohong, Zhang Xiangdong, Jiang Yuefeng, Zhang Guan, Zhao Gang, Zhao Hongdan, Zhang Peng
机构信息
Department of Chemistry, Liaoning University, Shenyang 110036, PR China.
出版信息
Ultrason Sonochem. 2007 Feb;14(2):246-52. doi: 10.1016/j.ultsonch.2006.05.003. Epub 2006 Jul 14.
The transition crystal TiO(2) sonocatalyst was prepared utilizing the method of ultrasonic irradiation in hydrogen peroxide solution. The sonocatalytic activity of the transition crystal TiO(2) powder was validated through the degradation of methyl orange in aqueous solution by ultrasonic irradiation. The results show that the sonocatalytic activity of the transition crystal TiO(2) powder is obviously higher than that of pure rutile and anatase TiO(2) powders as well as mixed rutile and anatase TiO(2) powders according to the proportion of corresponding transition crystal TiO(2) catalyst. The degradation ratio of methyl orange in the presence of the transition crystal TiO(2) catalyst surpasses 75% within 80 min ultrasonic irradiation, while the degradation ratios are 55.93%, 51.68% and 40.88%, respectively, for rutile, mixed and anatase TiO(2) powders.
采用在过氧化氢溶液中超声辐照的方法制备了过渡晶体TiO₂声催化剂。通过超声辐照降解水溶液中的甲基橙，验证了过渡晶体TiO₂粉末的声催化活性。结果表明，根据相应过渡晶体TiO₂催化剂的比例，过渡晶体TiO₂粉末的声催化活性明显高于纯金红石型和锐钛矿型TiO₂粉末以及金红石型与锐钛矿型TiO₂混合粉末。在过渡晶体TiO₂催化剂存在下，超声辐照80分钟内甲基橙的降解率超过75%，而金红石型、混合型和锐钛矿型TiO₂粉末的降解率分别为55.93%、51.68%和40.88%。
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