Characteristics of Ag ions Photoadsorption Using Photocatalytic TiO<sub>2</sub> Nanocrystalline Powder

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doi:2002.39.6.535

J. Korean Ceram. Soc. > Volume 39(6); 2002 > Article

Journal of the Korean Ceramic Society 2002;39(6): 535.
doi: https://doi.org/10.4191/kcers.2002.39.6.535

광촉매용 TiO₂ 나노분말을 이용한 Ag이온의 흡착 특성

이종국, 유해근, 황규홍¹, 서동석², 강희석³, 배현숙³, 김흥회³

조선대학교 금속·재료공학부
¹경상대학교 재료공학부
²서울대학교 재료공학부
³한국원자력연구소 원자력재료기술개발팀

Characteristics of Ag ions Photoadsorption Using Photocatalytic TiO₂ Nanocrystalline Powder

ABSTRACT

In this study photoadsorption propreties of Ag ion in AgNO$_3$ solution by TiO$_2$nanopowder synthesized by homogeneous precipitation process at low temperature were investigated. It was found that the photocatalytic redliction in AgNO$_3$solution was occurred by TiO$_2$nanopowder even under th sun light irradiation, although the reduction of Ag ions was slow with th small adsorption of 9.32 ppm. Notably the Ag adsorption was promoted in th dark condition probably owing to the chestnut bur shape of TiO$_2$ nanopowder itself. In the application of UV the Ag ions were completely adsorbed within 120 min, showing more significant photocatalytic reaction. The measured adsorption reaction rate and adsorption equilibrium rate constants were 0.0004 g/min and 1494.20(120 $m^2$/g), respectively.

Key words: $TiO_2$, Ag, Photoreaction