摘要
Fe modified hollow carbon spheres with large cavity and mesoporous shell （Fe-MHCs） were successfully synthesized by a simple pyrolysis and simultaneous deposition method. The organic molecules gases （carbon species） from pyrolysis of polystyrene deposited in the hard template at the catalysis of Fe species existing in the sample during calcination at high temperature. The obtained Fe-MHCs showed uniform spherical morphology with large surface area （924 m^2 g^-1）, mesoporous structure and a certain amount of Fe loaded. The Fe species and the special structure endowed the materials excellent catalytic activity in the oxidation of ethylbenzene to acetophenone. The conversion of 94.5% and the high selectivity to targeted product （97.4%） could be achieved and the acceptable recycling stability was also exhibited.
本文通过简单的热解沉积方法成功地制备了具有大空腔和介孔壳壁的铁修饰中空碳球.在高温碳化过程中,聚苯乙烯分解出的小分子有机气体(碳物种)会被介孔硅模板上的铁所捕获并沉积在模板上,从而得到铁修饰的中空介孔碳球(Fe-MHCs).制备的Fe-MHCs具有均一的球形形貌,大的比表面积(924 m^2g^(-1))和一定的铁负载量.Fe-MHCs样品中的铁及其形貌使其在乙苯氧化反应中展现了良好的催化性能.作为催化剂时,Fe-MHCs展现了良好的转化率(94.5%),高的选择性(97.4%)以及好的循环再利用性.
基金
supported by the National Natural Science Foundation of China (21676070)
Hebei Natural Science Foundation (B2015208109)
Hebei Training Program for Talent Project (A201500117)
Five Platform Open Fund Projects of Hebei University of Science and Technology (2015PT37)
Hebei One Hundred-Excellent Innovative Talent Program (Ⅲ) (SLRC2017034)
Hebei Science and Technology Project (17214304D and 16214510D)
