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Influence of radiation and TiO2 concentration on the hydroxyl radicals generation in a photocatalytic LED reactor. Application to dodecylbenzenesulfonate degradation

Abstract: One of the main issues associated to the development of photocatalysis is the lack of adequate indexes that allow the comparison of the results obtained in different experimental setup designs. The hydroxyl radicals (o OH) generation rate is a key factor to determine the overall oxidation rate. In this work, using a Light Emitting Diodes (LEDs) reactor aimed to maximize light efficiency and minimize energy consumption, the o OH generated have been determined as a function of the radiation and catalyst concentration following an indirect method based on the reaction between o OH and dimethyl sulfoxide (DMSO) to produce formaldehyde. Finally, the methodology has been applied to analyze the degradation kinetics of the anionic surfactant dodecylbenzenesulfonate (DBS), frequently used in shampoo formulations and detergents for washing machines. We propose a method based on the indirect determination of o OH radicals generation rate that allows the assessment and comparison of the kinetics of photocatalytic oxidation of pollutants.

 Autoría: Dominguez S., Ribao P., Rivero M., Ortiz I.,

 Fuente: Applied CatalysisB: Environmental, 2015, 178,165-169

 Editorial: Elsevier

 Fecha de publicación: 01/11/2015

 Nº de páginas: 5

 Tipo de publicación: Artículo de Revista

 DOI: 10.1016/j.apcatb.2014.09.072

 ISSN: 0926-3373,1873-3883

 Proyecto español: CTM2012- 33917 ; CTQ2012-31639

 Url de la publicación: https://doi.org/10.1016/j.apcatb.2014.09.072

Autoría

SARA DOMINGUEZ SUAREZ

PAULA RIBAO MARTINEZ