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Synthesis of thermally stable mesoporous TiO2 and investigation of its photocatalytic activity |
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| Authors: | Shuai Yuan Qiaorong Sheng Jinlong Zhang Hiromi Yamashita Dannong He |
| Affiliation: | aLab for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, PR China bResearch Center of Nanoscience and Nanotechnology, Shanghai University, 99 Shangda Road, Shanghai 200444, PR China cDivision of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan dShanghai National Engineering Research Center for Nanotechnology, 245 Jiachuan Road, Shanghai 200237, PR China |
| Abstract: | The effects of heat treatment, dopant type and thickness of sol layer, on the formation and stability of ordered TiO2 mesostructure were investigated. Higher ageing temperature facilitates the separation of organic phase and inorganic phase, while thinner sol layer facilitates the formation of homogeneous system and improves the mesostructural order of TiO2. Lanthanum dopant, which is more electropositive than Ti, can improve the thermal stability of mesostructure by enhancing the strength of Ti–O bond. On the contrary, Fe and Pd dopants, which are more electronegative than Ti, decrease the thermal stability of mesostructure. Furthermore, La doped mesoporous TiO2 shows high activity in the photocatalytic degradation of Rhodamine B under the irradiation of visible light. |
| Keywords: | Mesoporous TiO2 Dopant Thermal stability Photocatalytic activity |
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