浅池型TiO_2/ACF光催化降解水中苯酚的研究  

STUDY ON PHOTOCATALYTIC OXIDATION OF PHENOL IN WATER USING TiO_2 IMMOBILIZED ONTO ACF IN A SHALLOW POND REACTOR

作　　者：樊彩梅[1] 梁镇海[1] 闵延琴[1] 郝晓刚[1] 孙彦平[1] 

机构地区：[1]太原理工大学化工学院清洁化工研究所,山西太原030024

出　　处：《燃料化学学报》2003年第5期504-508,共5页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金(20006011);山西省自然科学基金(991015;20001013)。~~

摘　　要：为了提高光催化过程的降解速率,本文以涂覆法制得的二氧化钛 活性炭纤维(TiO2 ACF)为光催化剂,300W(365nm)高压汞灯为光源,研究了浅池型反应器中苯酚在TiO2 ACF上的光催化降解动力学;探讨了光强度、高压汞灯滤光以及光源种类对降解反应的影响,并对光氧化,光催化和吸附过程进行了比较。结果表明:光氧化对苯酚的降解无效果,光催化降解速率常数与吸附速率常数之比为3 35 1;光强越大,光催化降解速率越快;高压汞灯不滤光时光催化降解速率明显加快,但光催化反应仍遵循准一级反应动力学方程;波长为254nm紫外杀菌灯的降解效果高于波长为365nm高压汞灯滤光后的降解效果。Photocatalytic oxidation of phenol in water was studied in a shallow pond reactor using TiO2 immobilized onto activated carbon fiber as photocatalyst A 300?W high pressure Hglamp(365?nm) was used as light source The influences of light intensity, light filter as well as different light sources on the photocatalytic process were investigated, and the comparison of photolysis, adsorption and photocatalysis was also conducted The results showed that there was almost no oxidation of phenol in photolysis process, the ratio of the photocatalytic degradation rate constant and adsorption rate constant of phenol over TiO2 /ACF was 335/1; increasing Hglamp light intensity can improve the rate of oxidation; there was an apparent improvement of the photocatalytic rate under the irradiation of the high pressure Hglamp without filter, while the photocatalytic rate could be still described in terms of pseudo first order kinetics; the oxidation rate of high pressure Hglamp with a filter was lower than that of a UV germicidal lamp

关 键 词：苯酚 二氧化钛 活性炭纤维 光催化 

分 类 号：X703.1[环境科学与工程—环境工程] O625[理学—有机化学]