担载CuO基催化剂上2,4-二氯酚的有效氧化降解  

Efficient Oxidative Degradation of 2,4-Dichlorophenol over Supported CuO-Based Catalysts

作　　者：李京京[1] 刘兴海[1,2] 石雷[1] 孙琪[1] 周永刚[2] 徐健峰[2] 单作刚[2] 王福冬[2] 

机构地区：[1]辽宁师范大学功能材料化学研究所,辽宁大连116029 [2]盘锦市疾病预防控制中心,辽宁盘锦124010

出　　处：《催化学报》2011年第8期1387-1392,共6页

基　　金：辽宁省教育厅基金(2009A421)~~

摘　　要：研究了2,4-二氯酚的催化氧化降解.结果表明,CuO/γ-Al2O3催化剂表现出较高的活性,且碱土金属氧化物助剂的添加可进一步显著提高2,4-二氯酚氯离子的释放率,其中以SrO的促进作用最强,该催化剂循环使用3次,2,4-二氯酚转化率及氯离子的释放率均维持100%.X射线衍射和NH3程序升温脱附结果表明,催化剂上CuO粒子分散度高并且酸中心数少有利于2,4-二氯酚的氧化降解.提出了2,4-二氯酚催化氧化降解可能的反应途径.The catalytic oxidative degradation of 2,4-dichlorophenol（2,4-DCP）was studied.The results indicated that CuO/γ-Al2O3 exhib-ited high activity for the reaction.Adding alkaline-earth metal oxides into CuO/γ-Al2O3 improved the liberation rate of chloride ion from 2,4-DCP remarkably and SrO was the most efficient.The 2,4-DCP conversion and the liberation rate of chloride ion reached 100% when the CuO/γ-Al2O3-SrO catalyst was used 3 times.The results of X-ray diffraction and the temperature-programmed-desorption of ammonia indi-cated that the catalyst with good dispersion of CuO particles and a less amount of acid sites was favorable for the efficient oxidative degrada-tion of 2,4-DCP.A probable pathway of the oxidative degradation for 2,4-DCP over the copper-based catalyst was suggested.

关 键 词：氧化铜 氧化铝 负载型催化剂 碱土金属氧化物 2 4-二氯酚 氧化降解 

分 类 号：O643.32[理学—物理化学]