摘要
采用吸附、焙烧法制备了纳米二氧化钛催化剂,用电催化系统对甲基橙溶液进行了电催化氧化降解处理,考察了影响降解效果的主要因素。实验结果表明:电催化氧化降解效果随槽电压的增加而提高,酸性条件更利于提高COD和色度的去除率,Fe2+浓度以及反应时间的增加同样能提高降解效率。电催化氧化降解甲基橙的过程中,COD的去除率低于色度的去除率。纳米二氧化钛催化剂的催化效果显著,能够有效的去除甲基橙,去除机制主要是H2O2,·OH对有机物的氧化、降解。
A nanometer TiO2 catalyst was prepared by the method of adsorption-roasting, a degradation treatment of methyl orange solution was carried out in an electrocatalytic system by electrocatalytic oxidation, and the main factors affecting the result of the degradation were studied. It was shown by the results of the test that the result of the degradation by electrocatalytic oxidation was improving with the increasing of the voltage of the cell, that acid conditions more benefited the improvement of the removal rates of COD and colority, and that the increase of the concentration of Fe2+ as well as the reaction time also improved the degradation efficiency. During the degradation of methyl orange by electrocatalytic oxidation, the removal of COD was slower than that of colority. The effects of the catalysis with nanometer TiO2 catalyst were obvious, which effectively removed methyl orange, the mechanism of which mainly consisted in the oxidation and degradation of organic matters by H2O2, ·OH.
出处
《工业用水与废水》
CAS
2004年第2期54-56,共3页
Industrial Water & Wastewater
关键词
二氧化钛
甲基橙
电催化氧化
羟基自由基
titanium dioxide
methyl orange
electrochemical oxidation
hydroxyl radicals
