Visible-light-driven photo-Fenton reactions using Zn1-1.5xFexS/g-C3N4 photocatalyst: Degradation kinetics and mechanisms analysis
Document Type
Article
Publication Date
6-5-2020
Abstract
The visible-light responsive hybrid catalysts (Zn0.94Fe0.04S/g-C3N4 or ZCN) were synthesized by a rapid microwave hydrothermal method. Our results showed that the deposition of Fe-doped ZnS onto g-C3N4 sheets prevented the aggregation of Zn0.94Fe0.04S and increased the surface area for mass transfer and light absorption. The highest degradation rate of p-nitrophenol (PNP) was 96.0% and the total organic carbon removal rate was 55.4% after 60-min simulated solar light irradiation on ZCN with Fe doping and g-C3N4 loading ratios of 0.04 and 0.20, respectively. Hydroxyl radical played a dominant role in PNP degradation, which was primarily attributed to the photo-Fenton reactions. The PNP degradation pathway involved denitration and hydroxylation reactions according to the Density Function Theory calculations and HPLC-MS/MS results. The QSAR analysis indicated that the toxicity of most intermediates was lower than PNP. This study develops novel materials with superior photocatalytic activity for elimination of refractory organic pollutants in wastewater.
Identifier
85078558808 (Scopus)
Publication Title
Applied Catalysis B Environmental
External Full Text Location
https://doi.org/10.1016/j.apcatb.2020.118653
ISSN
09263373
Volume
266
Grant
21677015
Fund Ref
Fund for Innovative Climate and Energy Research
Recommended Citation
Wang, Qiao; Wang, Peng; Xu, Peng; Li, Yang; Duan, Jiajun; Zhang, Guangshan; Hu, Limin; Wang, Xiaojing; and Zhang, Wen, "Visible-light-driven photo-Fenton reactions using Zn1-1.5xFexS/g-C3N4 photocatalyst: Degradation kinetics and mechanisms analysis" (2020). Faculty Publications. 5233.
https://digitalcommons.njit.edu/fac_pubs/5233
