通过简便的化学过程制备介孔二氧化钛球。

The formation of mesoporous TiO2 spheres via a facile chemical process.

作者信息

Zhang Yunxia, Li Guanghai, Wu Yucheng, Luo Yuanyuan, Zhang Lide

机构信息

Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, People's Republic of China.

出版信息

J Phys Chem B. 2005 Mar 31;109(12):5478-81. doi: 10.1021/jp0456640.

DOI:10.1021/jp0456640

PMID:16851585

Abstract

The mesoporous TiO(2) solid and hollow spheres have been synthesized via a controllable and simple chemical route. Structural characterization indicates that these TiO(2) mesoporous spheres after calcined at 500 degrees C have an obvious mesoporous structure with the diameters of 200-300 nm for solid spheres and 200-500 nm for hollow spheres. The average pore sizes and BET surface areas of the mesoporous TiO(2) solid and hollow spheres are 6.8, 7.0 nm and 162, 90 m(2)/g, respectively. Optical adsorption investigation shows that TiO(2) solid and hollow spheres possess a direct band gap structure with the optical band gap of 3.68 and 3.75 eV, respectively. A possible formation mechanism for TiO(2) solid and hollow spheres is discussed.

摘要

介孔TiO₂实心和空心球已通过一种可控且简单的化学路线合成。结构表征表明，这些TiO₂介孔球在500℃煅烧后具有明显的介孔结构，实心球直径为200 - 300nm，空心球直径为200 - 500nm。介孔TiO₂实心和空心球的平均孔径和BET表面积分别为6.8、7.0nm和162、90m²/g。光学吸附研究表明，TiO₂实心和空心球具有直接带隙结构，光学带隙分别为3.68和3.75eV。讨论了TiO₂实心和空心球可能的形成机制。