陶瓷-碳复合粒子电极的制备条件对三维电催化处理有机废水的影响  

Preparation and Properties of Ceramic-carbon Composite Particle Electrode for Three-dimensional Electrocatalytic Treatment of Organic Wastewater

作　　者：何万萍[1] 孟勇[1] 

机构地区：[1]湖南师范大学化学化工学院,湖南长沙410081

出　　处：《精细化工中间体》2017年第3期39-42,共4页Fine Chemical Intermediates

摘　　要：以多孔氧化铝陶瓷为基体,对其活化后在表面负载柠檬酸,固相焙烧得到一系列陶瓷-碳复合粒子电极,并以三维电催化氧化降解有机废水实验考察了各粒子电极的催化活性。实验结果表明:陶瓷基体在柠檬酸与水的质量比为20%的溶液中浸渍10 h,900℃下焙烧4 h制备的复合粒子电极的催化活性最高。在槽电压15 V、极板间距7 cm、支持电解质10 g/L、曝气0.07 L/min的条件下,处理2.5 h后,原COD值为56 734.38 mg/L的实际生产有机废水,COD的去除率达86.50%,COD值降至7 659.14 mg/L。A series of ceramic-carbon composite particle electrodes were prepared via high-temperature solid- state method. The porous alumina ceramic was used as the matrix, and a certain amount of citric acid was loaded to the surface of the ceramics after activation treatment as the source of carbon particles. The catalytic activity of each electrode was investigated by three-dimensional electrocatalytic oxidation of organic wastewater. The results showed that the composite particle electrode presented the optimal catalytic activity with dipping treatment in 20% citric acid solution （at mass ratio） for 10 h and then calcination at 900℃ for 4h.Under the conditions of tank voltage 15 V, plate spacing 7 cm, supporting electrolyte 10 g/L and aeration 0.07 L/min, the COD values of some organic wastewater dramatically dropped from 56 734.38 to 7 659.14 mg/L and the COD removal rate reached to 86.50% after treatment by the as-obtained ceramic-carbon composite particle electrode for 2.5 h.

关 键 词：多孔陶瓷 复合粒子电极 三维电催化 工业有机废水 COD 

分 类 号：X703[环境科学与工程—环境工程]