以磁性Fe_3O_4-MnO_2核壳结构复合材料为Fenton催化剂氧化去除水中4-氯酚  

OXIDATION OF 4-CHLOROPHENOL IN AQUEOUS SOLUTION USING Fe_3O_4-MnO_2 CORE-SHELL NANOCOMPOSITES AS HETEROGENEOUS FENTON-LIKE CATALYST

作　　者：刘杰[1] 赵志伟[1] 王威[1] 崔福义[1] 

机构地区：[1]哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150090

出　　处：《水处理技术》2014年第7期20-23,共4页Technology of Water Treatment

基　　金：国家自然科学基金青年项目(21304024);2012年教育部博士新人奖项目

摘　　要：为了克服MnO2难以固液分离的缺点,将磁性Fe3O4-MnO2核壳结构复合材料作为非均相催化剂,应用于Fenton反应体系氧化去除水中的4-氯酚的实验中。在对材料结构性质进行表征的基础上,通过实验研究了磁性Fe3O4-MnO2核壳结构复合材料的催化性能。结果表明,和单一的以Fe3O4或者MnO2作为催化剂相比,Fe3O4-MnO2核壳结构复合材料具有更高效的催化效率,75 min内4-氯酚的去除率达到了96.8%,而且通过外加磁场还能实现快速的固液分离。同时,催化剂投量、H2O2投量以及溶液pH的改变都会对4-氯酚的降解产生较大影响。For overcoming the drawback of hardly separation from aqueous solution of MnO2, Fe3O4-MnO2 core-sheU nanocomposites were used as heterogeneous Fenton-like catalyst for the 4-chlorophenol removal. On the basis of the catalyst characterization, the catalytic activity of the as-synthesized nanoeomposites was studied. The results showed that Fe3O4-MnO2 core-shell nanocomposites had enhanced catalytic capacity in comparison with the Single Fe3O4 or MnO2. The removal efficiency of 4-chlorophenol was up to 96.8% after 75 min. Moreover, the catalysts can be separated rapidly by means of the external magnetic field. Meanwhile; the catalyst dosage, H2O2 dosage and initial pH had great effect on the 4-chlorophenol removal.

关 键 词：非均相催化剂 FENTON反应 核壳结构 复合材料 4-氯酚 

分 类 号：TQ031.7[化学工程]