Photocatalytic Degradation of Dichlorvos through the use of Type TiO2 photocatalysts / zeolites (ZSM-5, Beta, Y)

Abstract

Photocatalytic degradation using semiconductor materials is a successful alternative and suitable for water treatment. The anatase form of TiO_2 is one of the catalysts that exhibits broad applications in the degradation of various organic pollutants, since it is very photocatalytically active, but is difficult and expensive to recover. In order to solve this problem, we studied the deposition of TiO2 in zeolitic support for application in the degradation of Dichlorvos (DDVP), an organophosphate pesticide soluble in water which can cause damage to aquatic organisms. TiO_2 deposition was performed by wet impregnation of zeolites synthesized by the hydrothermal method (ZSM-5 and Beta) and commercial (Y).
The materials thus prepared were characterized by various experimental techniques and evaluated by the photodegradation reactions of dichlorvos. Good results were obtained for the supported catalysts compared to uncharged matrix and commercial TiO_2.