Structure of TiO2 in TiO2-SiO2 prepared by a complexing agent-assisted sol-gel procedure |
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| Authors: | Toshikazu Nishide Fujio Mizukami Hidenobu Yamaguchi |
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| Affiliation: | (1) Nissan Research Center, Nissan Motor Co., Ltd., 1, Natsushima, 237 Yokosuka, Kanagawa, Japan;(2) National Institute of Materials and Chemical Research, 1-1-1, Higaski, Tsukuba, 305 Ibaraki, Japan;(3) Nissan ARC, Ltd., 1, Natsushima, 237 Yokosuka, Kanagawa, Japan |
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| Abstract: | Many types of TiO2-SiO2 (Ti:Si=50:50 mol%) were prepared by the sol-gel procedure with and without 2-methyl-2, 4-pentanediol (MPD) as an organic ligand. The effect of MPD on the gel structure and the properties of the TiO2 crystals were studied by XRD and raman spectroscopy, and the effect of the sol standing time on the properties of the TiO2 crystals were also studied by XRD spectroscopy. In the gels with MPD, anatase of TiO2 appeared at approximately 580°C, and the crystal structures were similar despite the difference in the gel preparation procedure. The titania gels with MPD were presumed to be dispersed in the silica gel matrix without any Ti-O-Si bond. In the presence of MPD, the formation of titania gels is controlled and the specified TiO2 crystal is produced. |
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| Keywords: | crystal structure complexing agent TiO2 TiO2-SiO2 |
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