铜掺杂改性TiO_2光催化降解三氟羧草醚废水研究

Photocatalytic Degradation of Wastewater Containing Acifluorfen by Copper Modified Titanium Dioxide

采用溶胶-凝胶法制备了铜掺杂改性二氧化钛光催化剂,考察了催化剂用量、光照时间、溶液pH值、铜离子浓度对三氟羧草醚光催化降解效率的影响并与非改性二氧化钛催化降解效率进行了对比。结果表明催化剂用量1.0 g/L、光照时间4 h、pH值4.58的最佳实验条件下,该催化剂处理三氟羧草醚废水的催化降解效率可达92%以上,比非改性二氧化钛催化降解效率提高30%以上,实验结果可为光催化处理难降解二苯醚类除草剂农药废水提供依据。

Copper doped TiO_2 photocatalyst was prepared by sol-gel method. The effects of catalyst dosage,illumination time,pH value of solution,the concentration of copper ion on acifluorfen photocatalytic degradation were analyzed and compared with the non-modified TiO_2 photocatalytic degradation efficiency. The results showed that the optimum experimental conditions were as follows: the amount of catalyst was 1 g/L,irradiation time was4 h,pH = 4. 5 8. Under these conditions,the efficiency of this catalyst in catalytic degradation of acifluorfen wastewater can reach 9 2 %,it was 3 0 % above the non-modified TiO_2 photocatalytic degradation efficiency. The experimental results can provide the basis for the degradation of diphenyl ether herbicides pesticide wastewater light catalytic treatment.