Wang Jun, Ma Teng, Zhang Zhaohong, Zhang Xiangdong, Jiang Yuefeng, Sun Wei, Li Ronghe, Zhang Peng
Department of Chemistry, Liaoning University, Shenyang 110036, PR China.
Department of Chemistry, Liaoning University, Shenyang 110036, PR China.
Ultrason Sonochem. 2007 Jul;14(5):575-582. doi: 10.1016/j.ultsonch.2006.11.006. Epub 2007 Jan 16.
The transition crystal TiO(2) catalyst with high sonocatalytic activity was obtained utilizing the microwave irradiation in hydrogen peroxide solution. At the same time a series of affecting factors (microwave irradiation time, heat-treated time and heat-treated temperature) to prepare the TiO(2) catalyst on the sonocatalytic degradation of parathion were considered in this paper. The ultrasound of low power was used as an irradiation source to induce treated TiO(2) particles to perform catalytic activity. The results show that the sonocatalytic activity of the transition crystal TiO(2) powder is obviously higher than those of pure ordinary rutile and anatase TiO(2) powders. At last, the parathion in aqueous solution was degraded completely and became some simple inorganic ions such as NO(3)(-), PO(4)(3-), SO(4)(2-), etc. The degradation ratio of parathion in the presence of the transition crystal TiO(2) catalyst attains nearly 80% within 60 min ultrasonic irradiation, while corresponding ones are only 65.23% and 53.88%, respectively, for pure ordinary rutile and anatase TiO(2) powders.
利用过氧化氢溶液中的微波辐射制备了具有高声催化活性的过渡晶体TiO₂催化剂。同时，本文考虑了一系列影响因素（微波辐射时间、热处理时间和热处理温度）对制备的TiO₂催化剂催化降解对硫磷的影响。采用低功率超声作为辐射源，诱导处理后的TiO₂颗粒发挥催化活性。结果表明，过渡晶体TiO₂粉末的声催化活性明显高于纯普通金红石型和锐钛矿型TiO₂粉末。最后，水溶液中的对硫磷被完全降解，生成了一些简单的无机离子，如NO₃⁻、PO₄³⁻、SO₄²⁻等。在过渡晶体TiO₂催化剂存在下，对硫磷在60 min超声辐射内的降解率达到近80%，而纯普通金红石型和锐钛矿型TiO₂粉末的相应降解率分别仅为65.23%和53.88%。
