Collect. Czech. Chem. Commun.
2003, 68, 2219-2230
https://doi.org/10.1135/cccc20032219
Photocatalytic Degradation of 4-Chlorophenol by •OH Radicals Generated by Thiophene Oligomers Incorporated in ZSM-5 Zeolite Channels
Gabriel Číka,*, Milada Hubinováa, František Šeršeňb, Jozef Krištínc and Monika Antošovád
a Department of Environmental Engineering, Faculty of Chemical and Food Technology, Slovak University of Technology, 812 37 Bratislava, Slovak Republic
b Institute of Chemistry, Faculty of Natural Sciences, Comenius University, 842 15 Bratislava, Slovak Republic
c Central Laboratory of Electronic and Optical Methods, Faculty of Natural Sciences, Comenius University, 842 15 Bratislava, Slovak Republic
d Department of Chemical and Biochemical Engineering, Faculty of Chemical and Food Technology, Slovak University of Technology, 812 37 Bratislava, Slovak Republic
Abstract
Degradation of 4-chlorophenol by reactive oxygen species was studied, the latter being generated by photo-assisted reactions of thiophene oligomers, synthesized in channels of the Na-ZSM-5 zeolite. The photoreaction was carried out in an aqueous suspension of photocatalyst, irradiated with visible light (λ > 400 nm). The spin-trapping method was used to detect the generated •OH radicals. The main products of the photodecomposition of 4-chlorophenol were found to be phenol, hydroquinone and maleic acid.
Keywords: ZSM-5 zeolite; Polythiophenes; Reactive oxygen species; 4-Chlorophenol; Photochemistry; Heterogeneous catalysis; Dehalogenation; Green chemistry; Photolysis.
References: 22 live references.
