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J. Korean Ceram. Soc. > Volume 42(7); 2005 > Article
Journal of the Korean Ceramic Society 2005;42(7): 461.
doi: https://doi.org/10.4191/kcers.2005.42.7.461
Brookite TiO2 코팅용 졸의 제조 및 광촉매 효과
김선재, 이남희, 이강, 최창주1
세종대학교 나노공학과/나노신소재공학연구소
1조선대학교 전기공학과
Preparation and Photocatalytic Effect of Brookite Phase TiO2 Colloidal Sol for Thin Film Coating
Sun-Jae Kim, Nam-Hee Lee, Kang Lee, Chang-Joo Choi1
Department of Nano Science and Technology/SAINT, Sejong University
1Department of Electrical Engineering Chosun University
ABSTRACT
Transparent TiO$_{2}$ sols were prepared by hydrothermal synthesis to heat Ti precursor solutions, from Ti hydroxides obtained with neutralizing aqueous TiOCl$_{2}$ solutions having various concentrations of NaCI by aqueous NaOH solution, in the autoclave at 120$^{circ}C$ The photocatalytic abilities of glass beads coated with the sol for gaseous benzene were evaluated. As a result, it was found that due to the increase of brookite phase in TiO$_{2}$ by controlling the concentration of Na ion the optical absorption of TiO$_{2}$ increases toward long wavelength but that in the area of short wavelength becomes relatively low and consequently the photocatalytic performance of TiO$_{2}$ thin film for benzene gas rather decreases, compared to that of composite film of anatase and brookite phases. These results suggest that in order for coated TiO$_{2}$ thin film to have high dissociation performance for benzene gas it is effective to form anatase and brookite phases compositely in TiO$_{2}$.
Key words: TiO2 Brookite, Photocatalyst, Colloidal sol, Thin film
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