摘要
采用水热晶化法一步合成了掺杂不同锡含量(以n(Si)/n(Sn)表示)的介孔结构氧化硅(MPS)复合材料。通过XRD、N2吸附-脱附、TEM、UV-Vis等分析测试技术对样品的结构进行表征。结果表明,当n(Si)/n(Sn)=100时,大多数锡以四配位状态存在于MPS骨架中;随锡的含量增加到n(Si)/n(Sn)=50时,MPS孔道内出现晶态SnO2纳米颗粒,并保持了良好的介观有序度和孔结构;进一步添加锡到n(Si)/n(Sn)=10时,更多的纳米SnO2颗粒分布在MPS孔道中,但其有序度遭到一定程度的破坏。
A series of tin-incorporated mesoporous silica was synthesized under hydrothermat conditions and characterized by XRD, N2 adsorption-desorption, TEM and UV-Vis. The results show that at a low concentration of tin species（n（si）/n（sn）=100）, a majority of tin is highly dispersed within the framework by replacing a fraction of silicon atoms. As the content of tin species increases to n（si）/n（sn）= 50, a fraction of tin transfers into crystalline SnO2 confined into the pore channels of MPS, and the tinincorporated silica still preserves a highly ordered mesoscopic structure and a desirable pore structure. More SnO2 nanoparticles are confined into the pore channels when the tin concentration further increases to n（si）/n（sn）=10,but at the cost of the mesoscopic order and the pore structure of silica hosts.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2009年第2期289-292,297,共5页
Bulletin of the Chinese Ceramic Society
基金
国家自然科学基金(50502002)
国家杰出青年基金(No.50525413)
北京市教委科技发展项目(KM200610005016)
关键词
介孔氧化硅
纳米氧化锡
组装
水热法
mesoporous silica
nanometer Tin oxide
assembly
hydrothermal method
