文献类型：期刊文献

中文题名：锰掺杂大孔径介孔氧化硅纳米球的制备与催化特性

英文题名：Preparation and Catalytic Activity of Manganese Doped Mesoporous Silica Nanoparticles with Large Pore Size

作者：于艳梅[1];董旭[1];顾金楼[1];李永生[1]

机构：[1]华东理工大学材料科学与工程学院,上海200237

年份：2012

卷号：38

期号：4

起止页码：453

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2011_2012】；

基金：高等学校博士学科点专项科研基金(20090074120009)

语种：中文

中文关键词：介孔;纳米粒子;掺杂;催化

外文关键词：mesoporous; nanoparticles; doping; catalysis

摘要：利用一种新的化学合成策略,制备了硅骨架上掺杂有高度分散的锰催化活性中心的介孔氧化硅催化剂,不仅保留了介孔氧化硅纳米粒子(MSNs)的尺寸,而且扩大了其介孔孔径。XRD、BET、SEM和TEM表征手段表明:制备的锰掺杂介孔氧化硅纳米粒子(Mn-MSNs)呈现长程有序的介孔结构,大小约为100 nm,孔径扩大至4.0 nm左右。XPS和Raman光谱研究表明:掺入的锰元素高度分散在介孔骨架上。所合成的纳米级介孔催化剂对叔丁基过氧化氢液相氧化乙基苯的探针反应显现了良好的催化特性。
An effective post-hydrothermal treatment strategy has been developed to dope highly dispersed manganese catalytic centers into the framework of mesoporous silica, to keep the particle size in nanometric scale, and meanwhile to expand the pore size of the synthesized mesoporous silica nanoparticles （MSNs）. Characterizations by XRD, BET, SEM and TEM show that the synthesized samples （Mn- MSNs） are long period ordered with particles size about 100 nm and a relatively large pore size of about 4.0 nm. Observation by XPS and Raman spectra demonstrates that the introduced manganese active centers are highly dispersed within the framework of MSNs. The synthesized nanocatalysts show an excellent catalytic performance for the liquid oxidation of ethylbenzene with tert-butyl hydrogen peroxide.