改性MCM-41负载铁基催化剂的制备及其催化降解亚甲基蓝的研究

Preparation of modified MCM-41 supported iron-based catalyst and its application in degradation of methylene blue

以自制二元共聚物聚[苯乙烯—3-(甲基丙烯酰氧)丙基三甲氧基硅烷]改性MCM-41,并以其为载体制备铁基非均相催化剂。研究了该催化剂对亚甲基蓝的催化降解性能,同时利用FT-IR、XRD、SEM、NH3-TPD、氮气等温吸附(BET)等手段分析了分子筛改性后对铁基催化性能的影响。结果表明,改性MCM-41负载铁基催化剂具有优异的催化降解亚甲基蓝性能,25 min时去除率达到81.2%,与纯MCM-41负载铁基催化剂相比,性能提高了33.9%。

Iron-based heterogeneous catalysts are synthesized by using poly( styrene—3-methacryloxy propyltrimethoxy silane) modified MCM-41 as support.The activity of the catalyst to degrade methyl blue is investigated systematically.FT-IR,XRD,SEM,NH3-TPD and nitrogen isothermal adsorption( BET) are utilized to analyze the effect of modified MCM-41 on catalyst performance. It is indicated that the modified MCM-41 supported iron-based catalyst shows excellent performance in the degradation of methylene blue,over which the removal rate reaches 81. 2% in 25 minutes,which is 33. 9% higher than the performance of pure MCM-41 supported iron-based catalyst.