Issue 10, 2022

A molybdenum sulfo-oxide/cobalt oxysulfide Z-scheme heterojunction catalyst for efficient photocatalytic hydrogen production and pollutant reduction

Abstract

The existence of a heterojunction in the catalyst structure improves the efficiency of photocatalytic hydrogen production. The two phases of the heterojunction can be adjusted simultaneously by doping sulfur and oxygen to achieve a suitable energy band structure. Herein, we demonstrated a Mo(S,O)/Co(O,S) Z-scheme heterojunction catalyst system (abbreviated as MoCoOS) with different Co(O,S) doping amounts by a simple one-step method. Doping of different atoms in the crystal changes the energy band structure which tunes the optical, electrical, and electrochemical properties of MoCoOS. MoCoOS-2 prepared at a Co precursor content of 20 mmol performed the best at a rate of 153.4 μmol h−1 in photocatalytic hydrogen evolution, and it also showed excellent catalytic activities and good stability in reducing MO, MB, RhB, 4-NP and Cr6+. This efficient MoCoOS-2 catalyst can have practical applications in photocatalytic hydrogen production and catalytic reduction of chemical pollutants.

Graphical abstract: A molybdenum sulfo-oxide/cobalt oxysulfide Z-scheme heterojunction catalyst for efficient photocatalytic hydrogen production and pollutant reduction

Supplementary files

Article information

Article type
Paper
Submitted
21 Okt 2021
Accepted
27 Jan 2022
First published
28 Jan 2022

J. Mater. Chem. A, 2022,10, 5328-5349

A molybdenum sulfo-oxide/cobalt oxysulfide Z-scheme heterojunction catalyst for efficient photocatalytic hydrogen production and pollutant reduction

Q. Wu, A. B. Abdeta, D. Kuo, H. Zhang, Q. Lu, J. Zhang, O. A. Zelekew, M. T. Mosisa, J. Lin and X. Chen, J. Mater. Chem. A, 2022, 10, 5328 DOI: 10.1039/D1TA09053D

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