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Institution:环境科学与工程学院

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

Summary: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 h 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 actived 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 using ECOSAR and T.E.S.T models. The research provides a mechanistic foundation for the rational engineering of heterogeneous advanced oxidation processes toward efficient chlorophenol remediation.

First Author:Kongyu-ang Qu

Correspondence Author:Sen Wang,Zuoli He,Shu-guang Wang

All the Authors:Hanxuan Li,Jialiu Sun

Indexed by:Journal paper

Document Code:1915346013809172481

Volume:194

DOI Number:10.1016/j.mssp.2025.109541

Number of Words:10

Translation or Not:No

Date of Publication:2025-08

Links to Published Journals:https://doi.org/10.1016/j.mssp.2025.109541

Release Time:2025-09-18