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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
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