摘要
采用十六烷基三甲基溴化铵和十六胺为混合模板剂,在碱性条件下水热合成锰掺杂氧化硅有序介孔材料MnMCM41。借助XRD,IR,HRTEM,N2吸附等测试手段对其有序介孔结构及孔结构进行表征。XRD和HRTEM检测表明:所合成材料具有高度的长程有序结构;依据样品的N2吸附曲线,合成材料具有毛细凝聚的陡峭台阶和狭窄的孔径分布。实验结果表明:十六胺的适量加入,可提高Mn掺杂介孔氧化硅材料的长程有序程度,并初步从界面作用和表面活性剂堆积准数两方面分析了混合模板剂在Mn掺杂有序介孔氧化硅材料合成中的作用机理。
Using the mixture of cetyltrimethylammonium bromide and neutral hexadecylamine as template, ordered-mesoporous manganese-containing silica was synthesized, which has a integrate hexagonal mesostructure. The characteristics of the mesostructure of the synthesized samples were investigated by means of XRD, IR, HRTEM, and N2 adsorption. The results from XRD and HRTEM indicate that the materials synthesized have a long-distance ordered structure and N2 adsorption isotherm test shows that the ordered Mn-MCM-41 materials exhibit sharp steps of capillary condensation and narrow pore size distribution. It is revealed that the appropriate addition of neutral hexadecylamine surfactants can conduce to stabilize the mesostructure of manganese-doped ordered-mesoporous silica. Function mechanism of the mixed surfactants in the synthesis of manganese-doped mesoporous silica was primarily analyzed from interface function and the packing parameter of surfactant.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2004年第6期723-727,共5页
Journal of The Chinese Ceramic Society
基金
教育部重点实验室开放基金(SYSJJ200315)资助项目。
关键词
混合模板剂
有序介孔氧化硅
锰掺杂
合成
Doping (additives)
Manganese
Pore size
Synthesis (chemical)
X ray diffraction analysis
