粒子电极制备条件对三维电催化处理嘧啶醇的影响  

Influence of particle electrodes preparing conditions on the treatment of 2-diethylamino-6-methyl-4-hydroxypyrimidine by three-dimensional electrocatalytic

作　　者：李明[1] 殷杰[1] 孟勇[1,2] 钟文周[2] 兰支利[2] 尹笃林[2] 

机构地区：[1]湖南师范大学资源循环综合技术研究中心,湖南长沙410081 [2]湖南师范大学化学化工学院资源精细化及先进材料湖南省高校重点实验室,湖南长沙410081

出　　处：《化工进展》2013年第5期1183-1186,共4页Chemical Industry and Engineering Progress

基　　金：湖南省教育厅重点资助项目(10A079)

摘　　要：以陶土为基体、金属氧化物为活性组分,采用固相焙烧制备了一系列的粒子电极,并以三维电催化氧化降解2-二乙胺基-6-甲基-4-羟基嘧啶模拟废水实验考察了各粒子电极的催化活性及稳定性。结果表明:氧化铜与氧化锌的配比分别为0.25 mol和0.1 mol每千克陶土,1000℃下焙烧2 h制备的粒子电极催化活性最高,在槽电压15 V,初始pH值为3、极板间距6 cm、支持电解质30 g/L,曝气40 L/h,处理150 min后,2-二乙胺基-6-甲基-4-羟基嘧啶和COD的去除率可分别达到83.45%和35.17%,且催化性能稳定。对降解机理的研究表明,2-二乙胺基-6-甲基-4-羟基嘧啶的主要降解反应为嘧啶环开环转化成小分子含氮化合物,而嘧啶开环后产物的矿化速度相对较慢。A series of particle electrodes were prepared by solid phase calcination method using pottery clay as substrate,mental oxide as active component.The catalytic activity of particle electrodes were investigated by the treatment of 2-diethylamino-6-methyl-4-hydroxypyrimidine simulated wastewater under three-dimensional electrocatalytic oxidation conditions.When the ratio of copper oxide and zinc oxide was 0.25 mole and 0.1 mole per Kilogram Pottery Clay,respectively,calcined temperature had been kept at 1000 ℃ for 2h,the activity of prepared particle electrode was the highest.The 2-diethylamino-6-methyl-4-hydroxypyrimidine removal rate and CODCrremoval rate was 83.45% and 35.17%,respectively,under cell voltage 15V,initial pH 3,electrode span 6cm,supporting electrolyte 30g/L,airflow 40L/h,150 min after the treatment,and the particle electrode indicates high catalytic stability.The study on degradation mechanism shows that the main degradation reaction of the 2-diethylamino-6-methyl-4-hydroxypyrimidine is the opening of pyrimidine ring into small nitrogen-containing compound,while the mineralization rate of the products after pyrimidine ring is destroyed is relatively low.

关 键 词：三维电催化 粒子电极 固相焙烧 2-二乙胺基-6-甲基-4-羟基嘧啶 

分 类 号：X703[环境科学与工程—环境工程]