光散射学报, 2011, 23 (3): 271, 网络出版: 2014-04-09
铁掺杂TiO2可见光催化降解溴酚蓝的动力学
Kinetics of Photocatalytic Degradation of Bromophenol Blue by Iron-doped TiO2 Undervisible Light
摘要
用水热法制备了铁掺杂的TiO2晶体粉末, 以SEM和XRD表征了样品的形貌和晶型, 研究了在不同反应条件下TiO2晶体粉末对溴酚蓝的光催化降解的动力学过程。结果表明: 所制备的TiO2晶体为锐钛矿型; 可见光照射下, 5 mg·L-1的溴酚蓝溶液, 掺10% Fe3+(摩尔分数)的催化剂用量0.0500 g, 室温下恒温反应4 h时溴酚蓝的降解率达到48.30%; 铁掺杂TiO2对溴酚蓝光催化降解反应可以用一级反应动力学方程进行描述。
Abstract
Iron-doped TiO2 crystal powders are prepared by hydrothermal method and are characterized by means of XRD and SEM, and the photocatalytic degradation process of bromophenol blue on the as-prepared iron-doped TiO2 is studied under different conditions.Experiment results show that the as-prepared TiO2 crystals are anatase. The best degeneration rate of bromophenol blue is about 48.30% for 4h when the amount of catalyst is 0.0500 g(10% iron-doped,mole fraction) and initial concentration of bromophenol blue is 5 mg·L-1. The kinetics of photocatalytic degradation reaction can be expressed by the first-order reaction kinetic model.
张一兵, 李玲, 谈军. 铁掺杂TiO2可见光催化降解溴酚蓝的动力学[J]. 光散射学报, 2011, 23(3): 271. ZHANG Yi-bing, LI Ling, TAN Jun. Kinetics of Photocatalytic Degradation of Bromophenol Blue by Iron-doped TiO2 Undervisible Light[J]. The Journal of Light Scattering, 2011, 23(3): 271.