Characterization of visible-light photo-Fenton reactions using Fe-doped ZnS (Fex-ZnS) mesoporous microspheres

Document Type

Article

Publication Date

1-1-2018

Abstract

A series of Fe-doped ZnS (Fex-ZnS) photocatalysts were synthesized using a one-pot hydrothermal method. The physicochemical properties of the as-prepared Fex-ZnS microspheres were characterized by different microscopic and spectroscopic techniques. Fe doping did not obviously change the morphology and crystallinity of ZnS, but effectively broadened the light response range into the visible-light region. Degradation of p-nitrophenol (PNP) was used to evaluate the photocatalytic performance of the Fex-ZnS catalysts under visible light irradiation with the addition of H2O2 to facilitate photo-Fenton-like reactions. The highest PNP removal rate of 83.8% after 180 min of irradiation was achieved under the optimal conditions, including a doping ratio of 6%, a H2O2 concentration of 3 mmol L-1 and a catalyst dosage of 0.8 g L-1. The effects of aqueous/solid mass transfer and intraparticle mass transfer limitations on the PNP degradation reactions were analyzed, indicating that the variations of catalyst size caused by different Fe doping ratios did not affect the photocatalytic reactions in this study. The PNP removal mechanism of the Fex-ZnS photocatalyst with H2O2 addition under visible light irradiation was proposed.

Identifier

85049879615 (Scopus)

Publication Title

Physical Chemistry Chemical Physics

External Full Text Location

https://doi.org/10.1039/c8cp02609b

ISSN

14639076

PubMed ID

29953161

First Page

18601

Last Page

18609

Issue

27

Volume

20

Grant

2016RAQXJ175

Fund Ref

National Natural Science Foundation of China

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