Photocatalytic Degradation of Ethiofencarb by a Visible Light-Driven SnIn4S8 Photocatalyst

doi:10.3390/nano11051325

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Please use this identifier to cite or link to this item: https://ir.csmu.edu.tw:8080/ir/handle/310902500/23545

Title:	Photocatalytic Degradation of Ethiofencarb by a Visible Light-Driven SnIn4S8 Photocatalyst
Authors:	Chen, CC;Shaya, J;Polychronopoulou, K;Golovko, VB;Tesana, S;Wang, SY;Lu, CS
Keywords:	photocatalysis;visible light;SnIn4S8;ethiofencarb;active radicals;degradation mechanism
Date:	2021
Issue Date:	2022-08-05T09:39:01Z (UTC)
Publisher:	MDPI
Abstract:	This work reports the preparation and detailed characterization of stannum indium sulfide (SnIn4S8) semiconductor photocatalyst for degradation of ethiofencarb (toxic insecticide) under visible-light irradiation. The as-prepared SnIn4S8 showed catalytic efficiency of 98% in 24 h under optimal operating conditions (pH = 3, catalyst dosage of 0.5 g L-1). The photodegradation reaction followed pseudo-first-order kinetics. The major intermediates have been identified using gas chromatography/mass spectrometry. O-center dot(2)- and (OH)-O-center dot radicals appeared to be the primary active species in the degradation process as revealed by scavenger and electronic spin resonance studies, while photogenerated holes had a secondary role in this process. A plausible mechanism involving two routes was proposed for ethiofencarb degradation by SnIn4S8 after identifying the major intermediate species: oxidative cleavage of the CH2-S and the amide bonds of the carbamate moiety. Lastly, SnIn4S8 was found to be efficient, stable, and reusable in treating real water samples in three successive photodegradation experiments. This study demonstrates the prospect of SnIn4S8 photocatalysis in treatment of natural and contaminated water from extremely toxic organic carbamates as ethiofencarb.
URI:	http://dx.doi.org/10.3390/nano11051325 https://www.webofscience.com/wos/woscc/full-record/WOS:000657001900001 https://ir.csmu.edu.tw:8080/handle/310902500/23545
Relation:	NANOMATERIALS ,2021,v11,issue 5
Appears in Collections:	[researcher portal] Artical

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