Transparent Self-Standing Films of Titanium-Containing Nanoporous Silica
Transparent Self-Standing Films of Titanium-Containing Nanoporous Silica
复制标题
含钛纳米多孔二氧化硅透明自支撑薄膜
DOI：
10.1021/cm0102281
复制
发表时间：
2001
影响因子：
8.6
通讯作者：
M. Anpo
中科院分区：
文献类型：
--
作者：
M. Ogawa;K. Ikeue;M. Anpo
含钛（Ti/Si比为1/50）二氧化硅-表面活性剂介观结构材料的透明自支撑膜，厚度约为以四甲氧基硅烷、乙烯基三甲氧基硅烷、四异丙氧基钛和十八烷基三甲基氯化铵为原料，采用溶剂蒸发法合成了粒径为50 μ m，横向尺寸为几厘米的纳米TiO2。通过随后在空气中在550 ° C下煅烧将膜转化为含钛纳米多孔二氧化硅膜，而在表面活性剂去除后保留其高度有序的介观结构和宏观形态。通过改变起始混合物的组成，得到了具有六方和立方对称性的含钛纳米多孔二氧化硅薄膜。所得到的材料具有大的表面积（约。900 m2/g），如通过氮吸附/解吸等温线所证明的。钛离子以四面体配位的形式存在于二氧化硅网络中。紫外光照射的含钛纳米多孔二氧化硅薄膜中的.
Transparent self-standing films of titanium-containing (Ti/Si ratio of 1/50) silica−surfactant mesostructured materials, having a thickness of ca. 50 μm and a lateral size of a few centimeters, were synthesized by the solvent evaporation method from tetramethoxysilane, vinyltrimethoxysilane, titanium tetraisopropoxide, and octadecyltrimethylammonium chloride. The films were converted to titanium-containing nanoporous silica films by subsequent calcination in air at 550 °C, while their highly ordered mesostructures and macroscopic morphology were retained after the surfactant removal. Titanium-containing nanoporous silica films with hexagonal and cubic symmetry were obtained by changing the composition of the starting mixtures. The resulting materials possess a large surface area (ca. 900 m2/g) as evidenced by nitrogen adsorption/desorption isotherms. The titanium ions exist in the silica network as a tetrahedrally coordinated species. UV irradiation of the titanium-containing nanoporous silica film in the...