One-step photodeposition of spatially separated CuOx and MnOx dual cocatalysts on g-C3N4 for enhanced CO2 photoreduction

The rapid recombination of photogenerated carriers of photocatalysts greatly limits their actual application in CO2 conversion into valuable chemicals. Herein, dual CuOx and MnOx cocatalysts are decorated on g-C3N4 nanosheets via a one-step photodeposition strategy. Benefiting from the repulsion bet...

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Published in:Dalton transactions : an international journal of inorganic chemistry 2023-08, Vol.52 (34), p.11934-11940
Main Authors: Tian, Fengyu, Wu, Xinyao, Chen, Junhong, Sun, Xuebiao, Yan, Xuemin, Liao, Guangfu
Format: Article
Language:English
Subjects:
Carbon dioxide
Carbon nitride
Electrons
Heterojunctions
Heterostructures
Nanoparticles
P-n junctions
Photocatalysts
Separation
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container_end_page 11940
container_issue 34
container_start_page 11934
container_title Dalton transactions : an international journal of inorganic chemistry
container_volume 52
creator Tian, Fengyu
Wu, Xinyao
Chen, Junhong
Sun, Xuebiao
Yan, Xuemin
Liao, Guangfu
description The rapid recombination of photogenerated carriers of photocatalysts greatly limits their actual application in CO2 conversion into valuable chemicals. Herein, dual CuOx and MnOx cocatalysts are decorated on g-C3N4 nanosheets via a one-step photodeposition strategy. Benefiting from the repulsion between Cu2+ and Mn2+ cations, a novel g-C3N4-based heterostructure loaded with spatially separated CuOx and MnOx nanoparticle dual cocatalysts has been successfully fabricated. Cu favors the trapping of electrons, while MnOx tends to collect holes. Moreover, the Cu2O/g-C3N4 p–n heterojunction also accelerates the charge separation. As a result, the photogenerated holes and electrons flow into and out of the photocatalyst, respectively, resulting in enhanced charge separation for achieving efficient CO2 photoreduction over CuOx/g-C3N4/MnOx. Accordingly, the optimized CuOx/g-C3N4/MnOx exhibits an improved CO production rate of 5.49 μmol g−1 h−1, which is 27.5 times higher than that of bare g-C3N4.
doi_str_mv 10.1039/d3dt01522j
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subjects Carbon dioxide
Carbon nitride
Electrons
Heterojunctions
Heterostructures
Nanoparticles
P-n junctions
Photocatalysts
Separation
title One-step photodeposition of spatially separated CuOx and MnOx dual cocatalysts on g-C3N4 for enhanced CO2 photoreduction
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