镍(Ⅱ)配合物官能化的MCM-41催化分子氧环氧化苯乙烯(英文)  

Nickel(Ⅱ) complex anchored on MCM-41 for the epoxidation of styrene by oxygen

作　　者：杨刚[1] 陈星[1] 王小丽[1] 邢卫红[1] 徐南平[1] 

机构地区：[1]南京工业大学材料化学工程国家重点实验室,江苏南京210009

出　　处：《催化学报》2013年第7期1326-1332,共7页

基　　金：supported by the National Natural Science Foundation of China(20576052)~~

摘　　要：制备了镍(Ⅱ)席夫碱配合物官能化的MCM-41多相催化剂MCM-41-Ni.利用X射线粉末衍射、氮气物理吸附脱附、红外光谱、热重、电感耦合等离子体原子发射光谱、元素分析和透射电镜等方法对催化剂进行了表征.以氧气为氧化剂,MCM-41-Ni在催化环氧化苯乙烯的反应中表现出较高的催化活性;苯乙烯的转化率为95.2%,环氧苯乙烷的选择性为66.7%.系统地研究了反应温度、催化剂用量、溶剂以及反应时间对反应性能的影响.催化剂经过4次循环仍然表现出较好的稳定性和催化活性.A heterogeneous catalyst, MCM‐41‐Ni, was synthesized by anchoring a nickel（Ⅱ） Schiff base complex onto amino‐modified MCM‐41. The catalyst was characterized by small angle X‐ray diffraction, nitrogen adsorption, infrared spectroscopy, thermal gravimetric analysis, inductively coupled plasma and C, H, N elemental analysis, and transmission electron microscopy. MCM‐41‐Ni showed excellent catalytic activity for the epoxidation of styrene with O2 as oxidant with high styrene conversion （95.2%） and epoxide selectivity （66.7%）. The influence of reaction temperature, catalyst amount, solvent, and reaction time was studied. MCM‐41‐Ni showed good recyclability and can be reused four times.

关 键 词：镍席夫碱配合物 MCM-41分子筛 苯乙烯环氧化 分子氧 

分 类 号：O643.32[理学—物理化学]