材料科学
煅烧
无定形固体
化学工程
胶体
胶体晶体
溶胶凝胶
钛
球体
表征(材料科学)
摩尔比
硅酸盐
纳米技术
结晶学
催化作用
冶金
有机化学
化学
工程类
物理
天文
摘要
Three-Dimentionally Ordered macroporous titanium-silica mixed oxides were successfully synthesized by using polystyren sphere colloid crystal as the template and the sol of tetraethyl silicate and tetrabutoxy-titane as the filling fluid. The sol filled in the voids among spheres by capillary forces, and then transformed into gel in situ. Latex spheres were removed by calcination(5℃/min; 300℃,5h; 570℃, 5h). The macroporous samples show a beautiful iridescence in reflected light. SEM indicates that the pores are about 500nm in size and arrayed periodically in a face-centered cubic (fcc) structure and connected with each other by small windows. EDS indicates that the Si/Ti molar ratio is 2.7. XRD indicates the wall of the pores is amorphous.
科研通智能强力驱动
Strongly Powered by AbleSci AI