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J. Korean Ceram. Soc. > Volume 38(12); 2001 > Article
Journal of the Korean Ceramic Society 2001;38(12): 1097.
침전제 적하법을 이용한 $TiO_2$고정화 다공체 제조
신대용, 한상목1, 김경남2
강원대학교 석재복합 신소재제품 연구센터
1강원대학교 신소재공학과
2삼척대학교 신소재공학과
Synthesis of $TiO_2$Anchored on a Porous Clay Ceramic Support Using Dropping Precipitant Method
ABSTRACT
TiO$_2$anchored on a porous clay ceramic support (PCS) for use in lightweight photocatalyst were synthesized by the dropping precipitant method. A PCS of macro and micro pore size of around several mm~${mu}{textrm}{m}$ in diameter were prepared by the rapid heat treatment at, 1,15$0^{circ}C$ for 10 min from low grade of clay. The change in pH of reaction solution due to the different addition rate of NH$_4$HCO$_3$as a precipitant, the reaction temperature and the concentration of TiCl$_4$had a pronounced effect on the nature of precipitated TiO$_2$particles on the surface of a PCS and the crystal structure of precipitated TiO$_2$particles. At an addition rate of 0.8 ml/min of NH$_4$HCO$_3$and pH=6 of reaction solution, homogeneous precipitation of TiO$_2$particles on a PCS was achieved. TiO$_2$particles with anatase phase was precipitated on the surface of a PCS at the low concentration of TiCl$_4$, the high addition rate of NH$_4$HCO$_3$and the high reaction temperature.
Key words: Photocatalyst, Anatase phase, Porous clay ceramic support(PCS), Dropping precipitant method
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