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纳米TiO2光催化降解苯酚的动力学研究
KINETIC STUDIES ON PHOTOCATALYTIC DEGRADATION OF PHENOL BY NANOMATERIAL TITANIUM DIOXIDE
【摘要】 以125 W 高 压汞灯 为光源,以 Ti O2 为 催化剂,对 不同初 始浓度的 苯酚水溶 液进 行了 光催化降解 实验; 同时,考 察了不同 溶液p H 值时的 光催 化行 为. 根据 实验 结果, 提出 了与 文献 报 道不同的 Ti O2 光催 化降解苯 酚的零级 反应动 力学模型
【Abstract】 The photocatalytic degradation of phenol with different initial concentration by titanium dioxide suspension has been investigated under irradiation of 125 W high pressure mercury lamp. The photocatalytic reaction was also examined under different pH values. The experimental results indicated that the apparent rate constant K of the photocatalytic degradation of phenol was related to the initial concentration and the pH value of the phenol solution. The apparent rate constant K linearly increased with increasing the initial phenol concentration and with increasing the pH value up to 9. Based on the experimental results, a zero order kinetic model was proposed, being different from that reported in literatures.
【Key words】 titanium dioxide; phenol; photocatalysis; degradation; kinetic model;
- 【文献出处】 催化学报 ,CHINESE JOURNAL OF CATALYSIS , 编辑部邮箱 ,1999年03期
- 【被引频次】71
- 【下载频次】638