Ag2S-分子印迹-TiO2光催化降解废水性能研究

Study on Photocatalytic Degradation of Wastewater by Ag2S-MIP-TiO2

以溶胶-凝胶法为基础,以硫脲和硝酸银分别为硫源和银源制备出Ag2S聚合物,然后以对羟基苯甲酸乙酯为目标印迹分子(MIP),钛酸正四丁酯为钛源,制备出了Ag2S-MIP-TiO2粉体。将所得粉体用SEM等手段进行表征,并利用其在紫外光下进行光催化降解废水实验。结果表明,光催化反应90 min降解对羟基苯甲酸乙酯的效率达92.22%,是TiO2的1.42倍,并且能够选择性处理目标污染物废水,选择性因子达3.571,为MIP-TiO2的1.73倍。

Based on the sol-gel method,Ag2S polymer was prepared by using thiourea and silver nitrate as sulfur source and silver source respectively,and then imprinted with ethyl p-hydroxybenzoate.The butyl ester was a titanium source,and Ag2S-MIP-TiO2 powder was prepared.The obtained powder was characterized by SEM and the like,and it was used for photocatalytic degradation of wastewater under ultraviolet light.The results showed that,the degradation efficiency of ethyl p-hydroxybenzoate reached 92.22%after photocatalytic reaction of 90 min,which was 1.42 times of TiO2.And it was able to selectively treat target wastewaters with a selectivity factor of 3.571,which was 1.73 times of MIP-TiO2.