期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 582, 期 -, 页码 212-226出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2020.08.040
关键词
Dual defects; Hot electrons; Build-in electric field; Z-scheme; NO removal
资金
- Project of the National Natural Science Foundation of China [51772180]
- Shaanxi Province Key Research and Development Plan [2018GY-107]
- Graduate Innovation Fund of Shaanxi University of Science and Technology [SUST-A04]
In this study, a dual defects mediated W18O49/g-C3N4-x heterojunction was prepared, showing enhanced photocatalytic performance for NO removal and pollutants degradation due to higher redox ability, efficient charge separation, and full-solar-spectrum-driven degradation.
In this work, dual defects mediated W18O49/g-C3N4-x heterojunction was prepared by in-situ hydrothermal method. The conversion from.-type to Z-scheme heterojunction was achieved due to the formation of build-in electric field from g-C3N4-x to W18O49. Tests results indicated that the LSPR hot electrons of W18O49 could directly drive oxygen reduction reaction to generate center dot O-2(-) species and the partial electrons of g-C3N4-x were captured by O defect states of W18O49 to stabilize its free charge density, resulting in the continuous generation of high-energy hot electrons. The photo-generated carriers had the stronger redox ability compared with g-C3N4-x and W18O49 due to the Z-scheme charge transfer paths. Combined with the promoted exciton dissociation induced by N vacancies, the enhanced light absorption and accelerated carriers' separation induced by near-field enhancement effect in visible-NIR range of oxygen vacancies, W18O49/g-C3N4-x heterojunction exhibited enhanced photocatalytic performance for NO removal and full-solar-spectrum-driven pollutants degradation. (C) 2020 Elsevier Inc. All rights reserved.
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