Issue 7, 2022

Emerging investigator series: hetero-phase junction 1T/2H-MoS2 nanosheets decorated by FeOOH nanoparticles for enhanced visible light photo-Fenton degradation of antibiotics

Abstract

The photo-Fenton system is considered to be an economical and environmentally-friendly way to remove organic pollutants in the aquatic environment. However, slow electron transfer and retarded Fe2+/Fe3+ conversion have hampered its practical applications. Herein, we designed and prepared the hetero-phase junction 1T/2H-MoS2@FeOOH, effectively enhancing the photo-Fenton degradation efficiency by 3.25-fold compared to FeOOH alone. Theoretical calculations demonstrated that the 1T/2H-MoS2 hetero-phase junction features mid-gap states and a narrower band gap, enabling broader visible-light absorption and quicker electron transport. Additionally, the application of 1T/2H-MoS2@FeOOH resulted in Fe2+/Fe3+ and Mo4+/Mo6+ dual reaction sites, which were beneficial for the sufficient activation of H2O2 to HO2˙. HO2˙-dominated degradation pathways and mechanisms were revealed to provide new insights for developing advanced oxidation processes to effectively remove emerging contaminants.

Graphical abstract: Emerging investigator series: hetero-phase junction 1T/2H-MoS2 nanosheets decorated by FeOOH nanoparticles for enhanced visible light photo-Fenton degradation of antibiotics

Supplementary files

Article information

Article type
Paper
Submitted
17 Phe 2022
Accepted
07 Mme 2022
First published
08 Mme 2022

Environ. Sci.: Nano, 2022,9, 2342-2350

Emerging investigator series: hetero-phase junction 1T/2H-MoS2 nanosheets decorated by FeOOH nanoparticles for enhanced visible light photo-Fenton degradation of antibiotics

L. Sun, X. Tan, W. Ding and Y. Huang, Environ. Sci.: Nano, 2022, 9, 2342 DOI: 10.1039/D2EN00045H

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