Novel synthesis of high-surface-area ordered mesoporous TiO2 with anatase framework for photocatalytic applications |
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| Authors: | Li-Heng Kao Tzu-Chien Hsu Kuo-Kuang Cheng |
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| Institution: | 1. Department of Chemical and Materials Engineering, National Kaohsiung University of Applied Science, Kaohsiung 80778, Taiwan;2. Institute of Materials Science and Engineering, National Sun Yat-sen University, Kaohsiung 80424, Taiwan |
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| Abstract: | Ordered mesoporous TiO2 materials with an anatase frameworks have been synthesized by using a cationic surfactant cetyltrimethylammonium bromide (C16TMABr) as a structure-directing agent and soluble peroxytitanates as Ti precursor through a self-assembly between the positive charged surfactant S+ and the negatively charged inorganic framework I? (S+I? type). The low-angle X-ray diffraction (XRD) pattern of the as-prepared mesoporous TiO2 materials indicates a hexagonal mesostructure. XRD and transmission electron microscopy results and nitrogen adsorption–desorption isotherms measurements indicate that the calcined mesoporous TiO2 possesses an anatase crystalline framework having a maximum pore size of 6.9 nm and a maximum Brunauer–Emmett–Teller specific surface area of 284 m2 g?1. This ordered mesoporous anatase TiO2 also demonstrates a high photocatalytic activity for degradation of methylene blue under ultraviolet irradiation. |
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