A One-Pot Approach to Hierarchically Nanoporous Titania Hollow Microspheres with High Photocatalytic Activity
A One-Pot Approach to Hierarchically Nanoporous Titania Hollow Microspheres with High Photocatalytic Activity
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DOI：
10.1021/cg700794y
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发表时间：
2008-01
影响因子：
3.8
通讯作者：
Jiaguo Yu;W. Liu;Huogen Yu
中科院分区：
文献类型：
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作者：
Jiaguo Yu;W. Liu;Huogen Yu
以二氧化硅微球为模板，TiF4为前驱体，在60℃的条件下，在纯水中制备了一种基于模板定向沉积和原位模板牺牲溶解的简单一步模板法制备结晶二氧化钛（TiO2）空心微球。通过调整前驱体TiF4的浓度和SiO2球的尺寸，可以控制TiO2空心球的壁厚和尺寸。制备的TiO2空心球具有纳米孔结构，具有较高的光催化活性。这种微介宏观结构的二氧化钛空心微球在光催化、催化、太阳能电池以及分离和纯化过程中应该有各种潜在的应用。
A simple one-step template method for the fabrication of crystalline titania (TiO2) hollow microspheres, based on template-directed deposition and in situ template-sacrificial dissolution, is developed in pure water by using SiO2 microspheres as templates and TiF4 as the precursor at 60 °C. The wall thickness and size of the TiO2 hollow spheres can be controlled by adjusting the concentration of the precursor TiF4 and the size of the SiO2 spheres, respectively. The prepared TiO2 hollow spheres exhibit hierarchically nanoporous structures and a high photocatalytic activity. This hierarchically micromeso-macrostructured TiO2 hollow microspheres should find various potential applications in photocatalysis, catalysis, solar cells, and separation and purification processes.