Zr还原法制备高纯度Ti4O7及其电催化处理2,4-二氨基甲苯废水

摘要

基于Zr高温还原锐钛型TiO2法,制备出了电催化材料Ti4O7,并用XRD和SEM技术对样品的组成、形貌进行了表征.结果表明,在氩气气氛下,反应温度为1 050 ℃,反应时间为8 h,Zr和TiO2的摩尔比为1∶3时可以得到较为纯净的Ti4O7.以自制Ti4O7/Ti电极为阳极,Pt电极为阴极,恒电流0.3 A,电流密度为0.15 A/cm2条件下电解处理2,4-二氨基甲苯(TDA)废水,结果表明,Ti4O7/Ti电极对TDA废水具有一定催化作用,反应180 min,废水TDA去除率为62.0%,COD去除率为40.3%.%The electric catalytic material Ti4O7 was prepared by Zr reducing anatase TiO2 in high temperature.The compositions and morphologies of sample were characterized by XRD and SEM techniques.The results showed that the relatively pure Ti4O7 can be obtained when reaction temperature was 1 050 ℃, reaction time was 8h and the molar ratio of Zr∶TiO2 was 1∶3, in Ar atmosphere, respectively.Moreover, the 2, 4-diaminotoluene (TDA) wastewater was treated by electrolysis, using the self-made Ti4O7/Ti electrode as anode and Pt electrode as cathode, and the current was controlled at 0.3 A,the current density was 0.15 A/cm2.The results showed that the Ti4O7/Ti electrode has the certain catalysis for the TDA wastewater.The removal rate of TDA wastewater and COD can reach 62% and 40.3%, when reaction time was 180 min.