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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 22, Number 12
BKCSDE 22(12)
December 20, 2001

Title	UV Light Induced Photocatalytic Degradation of Cyanides in Aqueous Solution over Modified TiO₂
Author	Hyoung-Joo Kim, Lianhai Lu, Jae-Hyun Kim, Chung-Hak Lee, Taeghwan Hyeon, Wonyong Choi, Ho-In Lee
Keywords	Photocatalytic, Cyanides, TiO2, Metal 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.
Page	1371 - 1374
Full Text	PDF

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