Title : Rationally designed assembled FeV3O8/g-C3N4 heterojunction improve carrier transport separation and efficiently promote the degradation of 2,4,6-TCP by photo-activated peroxymonosulfate

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Title of Paper:Rationally designed assembled FeV3O8/g-C3N4 heterojunction improve carrier transport separation and efficiently promote the degradation of 2,4,6-TCP by photo-activated peroxymonosulfate

Journal:Materials Science in Semiconductor Processing

Place of Publication:Elsevier

Key Words:Photocatalyst; Peroxymonosulfate; FeV3O8; C3N4; type-II heterojunction; Chlorophenols

Abstract:2,4,6-Trichlorophenol (TCP) is a typical chlorophenol pollutant that can invade our living aquatic environments and pose a serious threat to human health and livelihoods. Herein, the FeV3O8/g-C3N4 (FCN) type II heterojunctions were synthesized using a hydrothermal and calcination technique. The bonded interface of the CN sheet and the bimetallic FeV3O8 spheres gave rise to an effective interfacial carrier transmission and separation, which enabled a stable photocatalytic degradation of TCP with a removal rate of 62.8 % after 2 hours light irradiation. Interestingly, the heterojunction was able to photocatalytic activate peroxymonosulfate (PMS), leading to an increased TCP removal performance (close to 100 % in 60 min). The PMS may be quickly active by the separated photo-generated carrier, accelerating the TCP degradation process. The charge transfer mechanism of the type II FCN heterojunctions has been validated by Mott-Schottky analysis and valence band X-ray photoelectron spectroscopy (VB-XPS). Free radical scavenging experiments and electron paramagnetic resonance (EPR) spectroscopy were also conducted to confirm the co-existence and relative contribution of different active radicals to the degradation process. Based on liquid chromatography-mass spectrometry (LC-MS) analysis, TCP degradation pathways have been proposed and the toxicity of the intermediate products also has been evaluated. The research provides a mechanistic foundation for the rational engineering of heterogeneous advanced oxidation processes toward efficient chlorophenol remediation.

All the Authors:Hanxuan Li,Jialiu Sun

First Author:Kongyu-ang Qu

Indexed by:Journal paper

Correspondence Author:Sen Wang,Zuoli He,Shuguang Wang

Discipline:Engineering

First-Level Discipline:Environmental Science and Engineering

Document Type:J

Volume:194

Page Number:109541

Number of Words:8000

Translation or Not:no

Date of Publication:2025-04-01

Included Journals:SCI