Open AccessPhotocatalytic degradation of the 2,4-dichlorophenoxyacetic acid herbicide using supported iridium materials
Author(s) -
Claudia Patricia Castañeda Martínez,
Ignacio Alfonso Alvarado Ortega,
Hugo Alfonso Rojas Sarmiento,
Francisco Javier Tzompantzi Morales,
Juan Romero
Publication year - 2021
Publication title -
ciencia en desarrollo
Language(s) - English
Resource type - Journals
eISSN - 2462-7658
pISSN - 0121-7488
DOI - 10.19053/01217488.v12.n1.2021.12447
Subject(s) - photocatalysis , iridium , crystallinity , degradation (telecommunications) , chemical engineering , materials science , chemistry , mineralization (soil science) , band gap , photochemistry , nuclear chemistry , catalysis , organic chemistry , composite material , telecommunications , computer science , nitrogen , engineering , optoelectronics
In this work, the effect of the addition of iridium on TiO2 and Nb2O5 supports obtained by wet impregnation method was evaluated in the photocatalytic degradation of 2,4-dichlorophenoxiacetic acid under UV irradiation. The synthetized materials were analyzed by different techniques in order to determinate their physicochemical properties. In general, it was observed that the addition of iridium modifies the surface area, band gap energy and it enhances the crystallinity of the materials. Besides, an increase in the photoactivity in the degradation of the herbicide was evidenced using the materials modified. However, the Ir/TiO2 photocatalyst possess the best photocatalytic behavior toward the degradation and possible mineralization of the herbicide. The improved performance of the photocatalyst could be argued by the role of the iridium particles as electron collectors favoring the effective separation of the charge carriers and, as consequence, increasing the degradation of the molecule.