摘要
以无水四氯化锡为锡源、正硅酸乙酯(TEOS)为硅源和氧供体、二氯甲烷为溶剂、无水三氯化铁为催化剂,通过非水解溶胶-凝胶过程制备锡硅复合氧化物材料;采用N2物理吸附、X-射线粉末衍射、傅立叶变换红外光谱等手段对锡硅复合氧化物材料进行表征。结果表明:与以环己烷为溶剂制备的锡硅复合氧化物材料相比,以二氯甲烷为溶剂制备的锡硅复合氧化物材料的比表面积和孔容明显增大,平均孔径明显减小,产率从31%提高到60%左右;催化剂无水三氯化铁的引入促进了Sn-O-Si键的形成,有利于产物的过饱和析出,制备的材料具有较大的比表面积(305.7m2·g-1),氧化锡以四方金红石结构分散在无定型态的氧化硅中。
The Sn/Si mixed oxides were prepared by non-hydrolytic sol-gel process with stannic chloride as tin source,tetraethoxysilane as silicon source and oxygen donor,dichloromethane as solvent,ferric chloride as catalyst.The materials were characterized by nitrogen adsorption-desorption,XRD and FTIR.Compared with the material prepared with cyclohexane as solvent,the material prepared with dichloromethane!as solvent had higher surface area,larger pore volume and smaller pore size,and the yield was improved from 33% to about60%.The introduction of ferric chloride catalyst promoted the formation of Sn-O-Si,which was conducive to the product of over saturated precipitation.The surface area of the materials was about 305.7 m2·g-1,and SnO2 was dispersed in amorphous silicon oxide in the form of tetrahedral rutile structure.
出处
《化学与生物工程》
CAS
2015年第3期30-32,35,共4页
Chemistry & Bioengineering
基金
国家国际科技合作项目(2013DFA40460)
煤化工下游C4工业链关键技术山西省科技创新重点团队项目(2012021007)
