Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 609, Issue -, Pages 212-223Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2021.12.007
Keywords
Mo-O bonds; S-scheme heterojunction; Synergistic effect; Photocatalytic hydrogen evolution
Categories
Funding
- Chinese National Natural Science Foundation [22062001]
- Ningxia low-grade resource high value utilization and environmental chemical integration technology innovation team project
- North Minzu University
- Innovation team of clean energy and green chemical Engineering, State Ethnic Affairs Commission
Ask authors/readers for more resources
Simple high-temperature calcination and hydrothermal methods were used to synthesize CeO2 and Mo-S. The hybrid catalyst 10%-CeO2/Mo-S exhibited the best photocatalytic hydrogen evolution activity, attributed to the Mo-O bonds promoting electron migration between the catalyst interfaces. The synergistic effect of S-scheme heterojunctions and Mo-O bonds accelerated the separation and migration of photo-induced carriers.
Simple high-temperature calcination and hydrothermal methods were followed to synthesize CeO2 and Mo-S, respectively. The efficient photocatalytic hydrogen evolution activity exhibited by the composite catalysts can be attributed to the edge active sites in Mo-S. The Mo-O bonds formed between CeO2 and Mo-S could further accelerate the processes of separation and migration of electrons between the catalyst interfaces. The hybrid catalyst 10%-CeO2/Mo-S exhibiting the best hydrogen generation ability (4.3 mmol h(-1) g(-1)) was obtained by optimizing the content of CeO2 in CeO2/Mo-S. Analysis of the PL spectral profile and photocurrent response recorded for the system revealed that 10%-COMS exhibited excellent photogenerated carrier separation ability. Analysis of the LSV and EIS curves revealed that 10%-COMS exhibited the optimal hydrogen production potential. The charge migration resistance provided by the systems was lower than the charge migration resistance provided by CeO2 and Mo-S. The synergism between the S-scheme heterojunctions and the Mo-O bonds helped accelerate the separation and migration of photo-induced carriers at the catalyst interfaces. The introduction of covalent bonds in the S-scheme heterojunctions and the results presented herein can potentially help develop a new method to realize photocatalytic hydrogen evolution. (C) 2021 Elsevier Inc. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available