首页|Synergistic enhancement of Ce-ZnO/g-C3N4 photocatalytic performance using N,O-bis-vacancy induction and S-scheme heterojunctions

Synergistic enhancement of Ce-ZnO/g-C3N4 photocatalytic performance using N,O-bis-vacancy induction and S-scheme heterojunctions

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The photocatalytic decontamination of organic pollutants is an environmentally friendly and efficient water treatment method.The introduction of vacancies,heterojunctions,and doping can enhance the performance of photocatalysts for such applications.In this study,N,O double-vacancy Ce-ZnO/g-C3N4 S-scheme heterojunction photocatalysts were prepared.It is found that the electron separation and transfer efficiencies are considerably improved by the presence of nitrogen vacancies in graphitic carbon nitride(g-C3N4)and oxygen vacancies in ZnO,in addition to the S-scheme heterojunction created be-tween the two materials.In the degradation of methylene blue and ciprofloxacin,the degradation rates exhibited by Ce-ZnO/g-C3N4 are significantly higher than those of the g-C3N4/ZnO system.This remarkable photocatalytic performance of Ce-ZnO/g-C3N4 may result from three key factors:(ⅰ)Ce doping,which produces impurity energy levels;(ⅱ)the generation of electron capture centres by the N and O vacancies;and(ⅲ)the synergistic effect of the S-type heterojunction formed at the interface between the two materials.This study therefore provides new approaches for the use of doping,va-cancies,and heterojunctions to induce the efficient degradation of organic pollutants.

PhotocatalysisVacancyS-schemeCe-ZnO/g-C3N4DegradationRare earths

Guyu Zhang、Yuan Zhang、Xinlei Zhao、Yujiang Jiao、Yumin Yan、Jianhui Jiang

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Engineering Laboratory of Chemical Resources Utilization in South Xinjiang of Xinjiang Production and Construction Corps,College of Chemistry and Chemical Engineering,Tarim University,Alar,843300,China

Bingtuan Science and Technology ProgramPresidential Research Fund of Tarim UniversityPresidential Research Fund of Tarim University

2021CB014TDZKCX202208TDZKZD202101

2024

10.1016/j.jre.2023.08.002

稀土学报(英文版)
中国稀土学会

稀土学报(英文版)

CSTPCDEI
影响因子：1.3
ISSN：1002-0721
年,卷(期)：2024.42(5)
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