Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/46325
Title: The effect of acetic acid on the photocatalytic degradation of catechol and resorcinol
Authors: Araña, J. 
Rodríguez, J. M.Doña 
Díaz, O. González 
Melián, J. A.Herrera 
Fernández Rodríguez, Cristina 
Peña, J. Pérez 
UNESCO Clasification: 330301 Tecnología de la catálisis
Keywords: Photocatalysis
FTIR
Acetic acid–dihydroxybenzenes interaction
TiO2
Issue Date: 2006
Publisher: 0926-860X
Project: Tratamiento de Aguas Residuales Urbanas E Industriales Mediante Sistemas Naturales de Depuración, Sistemas Fotocatalíticos y Su Combinación. 
Journal: Applied Catalysis A: General 
Abstract: The photocatalytic degradation of catechol and resorcinol with TiO2 in presence of acetic acid has been studied. Low concentrations of the acid (30–50 ppm) can modify the adsorption and degradation of the dihydroxybenzenes. However, the acetic acid concentration threshold at which effects are observed depends on the compound. FTIR analyses have shown that due to steric factors, catechol and resorcinol molecules adsorb on different TiO2 surface centres. Additionally, acetic acid molecules are able to displace Ti4+ coordinated water molecules and those interacting by hydrogen bonds, to a lesser extent. Consequently, the catalyst surface becomes restructured, favouring the adsorption of the dihydroxybenzenes. The acetates reaction with holes and oxygen molecules with photogenerated electrons to give O2− radicals which react with OH groups with acidic character to give new radicals that enhance catechol and resorcinol degradations.
URI: http://hdl.handle.net/10553/46325
ISSN: 0926-860X
DOI: 10.1016/j.apcata.2005.10.056
Source: Applied Catalysis A: General [ISSN 0926-860X], v. 299, p. 274-284
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