Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/46339
Title: Maleic acid photocatalytic degradation using Fe-TiO2 catalysts - Dependence of the degradation mechanism on the Fe catalysts content
Authors: Araña, J. 
González Díaz, O. 
Miranda Saracho, M.
Doa Rodríguez, J. M. 
Herrera Melián, J. A. 
Pérez Pea, J. 
UNESCO Clasification: 221001 Catálisis
Keywords: Photocatalysis
Maleic acid
FTIR
Complexes
Fe, et al
Issue Date: 2002
Journal: Applied Catalysis B: Environmental 
Abstract: The photocatalytic degradation of maleic acid by using Fe-doped (0.15, 0.5, 2 and 5% w/w in Fe) TiO2 catalysts has been studied. Catalysts with the lowest Fe content (0.15 and 0.5%) show a considerably better catalytic behavior than non-doped TiO2 and catalysts with higher Fe contents. Maleic acid molecules interact with the surface of the lowest Fe-containing catalysts and as a consequence, iron atoms are extracted from the catalyst surface as photoactive Fe3+–maleic acid complexes. When this complex is degraded, the resulting Fe2+ ions react with TiO2 holes (h+) and the iron return to the catalyst surface as Fe2O3. In catalysts with low Fe content (0.15 and 0.5% w/w in Fe) the quite and return of the metal to the surface occurs in a fast way. On the contrary, in catalysts with high Fe content (2 and 5% w/w in Fe) the formation of less photoactive complexes seems to predominate. FTIR studies have proven the formation of such complexes in the doped catalysts.
URI: http://hdl.handle.net/10553/46339
ISSN: 0926-3373
DOI: 10.1016/S0926-3373(01)00284-3
Source: Applied Catalysis B: Environmental [ISSN 0926-3373], v. 36 (2), p. 113-124
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