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UV light induced photocatalytic degradation of cyanides in aqueous solution over modified TiO2

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Authors
Kim, Hyeong Ju; Lu, Lian Hai; Kim, Jae-Hyun; Lee, Chung-Hak; Hyeon, Taeghwan; Choi, Won Yong; Lee, Ho In
Issue Date
2001-12
Citation
Bulletin of the Korean Chemical Society, Vol.22 No.12, pp.1371-1374
Keywords
photocatalyticcyanidesTiO2metal doping
Abstract
Metal doping was adopted to modify TiO2 (P-25) and enhance the photocatalytic degradation of harmful cyanides in aqueous solution. Ni, Cu, Co, and Ag doped TiO2 were found to be active photocatalysts for UV light induced degradation of aqueous cyanides generating cyanate, nitrate and ammonia as main nitrogen-containing products. The photoactivity of Ni doped TiO2 was greatly affected by the state of Ni, that is, the crystal size and the degree of reduction of Ni. The modification effects of some mixed oxides, that is, Ni-Cu/TiO2 were also studied. The activity of Ni-Cu/TiO2 for any ratio of Cu/Ni was higher than that of Ni- or Cu-doped TiO2, and the catalyst at the Cu/Ni ratio of 0.3 showed the highest activity for cyanide conversion.
ISSN
0253-2964
URI
http://hdl.handle.net/10371/166115
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Journal Papers (저널논문_화학생물공학부)
College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Chemical Convergence for Energy and Environment (에너지환경 화학융합기술전공)Journal Papers (저널논문_에너지환경 화학융합기술전공)
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