自制锐钛矿型TiO2对苯乙酮的光催化降解动力学研究

摘要

研究了在不同反应条件下以自制锐钛矿型的掺铁TiO2晶体粉末对苯乙酮的光催化降解的动力学过程.结果表明:可见光照射下,在苯乙酮溶液质量浓度为0.8 g/L、溶液调节为碱性(pH≥10)、自制TiO2催化剂(掺摩尔分数为5％的Fe3+)的质量浓度为1.6 g/L、室温的条件下,苯乙酮的光催化降解的表观反应速率常数k最大,拟合可见光下铁掺杂TiO2,降解苯乙酮为一级反应.%The kinetics course of the photocatalytic degradation process of acetophenone with home-made iron-doped TiO2 crystal powder has been studied under different conditions. Experimental results show that under visible light radiation,the apparent propagation rate constant k of the photocatalytic degradation of acetophenone are the highest,when the solution mass concentration of acetophenone is 0.8 g/L,regulated solution is alkaline (pH≥ 10), home-made catalyst (doped mole fraction is 5%) whose mass concentration of Fe3+ is 1.6 g/L and isothermal reaction time at room temperature. Under fitted visible light,the photocatalytic degradation of acetophenone with iron-doped TiO2 is of first class reaction.