CeO2改性Cu/TiO2及其光催化降解2,4-二氯苯氧乙酸研究

采用不同浸渍方式,用稀土氧化物CeO2对Cu/TiO2催化剂进行改性,制备了(Cu-Ce)/TiO2、Ce-Cu/TiO2和Cu-Ce/TiO2催化剂.采用X射线衍射(XRD)、比表面积(BET)、傅里叶拉曼光谱(FT-Raman)、氢程序升温还原(H2-TPR)以及电化学等技术对制备的催化剂进行了表征.将制备的催化剂...

Modification of Cu/TiO2 with CeO2 and Its Application in Photocatalytic Degradation of 2,4-Dichlorophenoxyacetic Acid

Three catalysts including （ Cu - Ce）/TiO2, Ce - Cu/TiO2, and Cu - Ce/TiO2 were prepared by modification of Cu/TiO2 with CeO2 through different ways of equal - volume impregnation and were characterized by XRD, BET, FT - Raman, H2 - TPR, and electrochemistry. These catalysts were used for photocatalytic degradation of 2,4 - dichlorophenoxyacetic acid （2,4 - DPA） solution under the UV irradiation. The fluorescence intensity and UV absorption strength of 2,4 -DPA solution were determined separately by fluorescence spectrophotometer and ultraviolet visible spectrophotometer to study the photocatalytic properties of these catalysts. The results show that the photocatalytic activities of three catalysts have a certain improvement compared with Cu/TiO2. The effects of impregnation ways on catalytic activities of the catalysts were significant. Cu - Ce/TiO2 catalyst prepared by first impregnating Cu/TiO2 with Ce （ NO3 ） 4 solution then with Cu （ NO3 ） 2 has the best photocatalytic activity.