Journal
APPLIED SURFACE SCIENCE
Volume 466, Issue -, Pages 133-140Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2018.10.027
Keywords
Nanocomposite; Z-scheme mechanism; Photocatalytic degradation; Photocatalytic H-2 evolution
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Funding
- Key Research Project of Shandong Province [2017GGX40121]
- National Natural Science Foundation of China [51402157, 51602164]
- Scientific Research Innovation Team in Colleges and Universities of Shandong Province
- Qilu University of Technology National (Provincial or School) Undergraduate Innovation and Entrepreneurship Training Program Funding Project
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The N-ZnO/g-C3N4 composites prepared by high temperature calcination exhibited excellent performance in both the photocatalytic H-2 evolution and photocatalytic degradation of Methylene blue (MB). It can be seen that the absorption range of ZnO extends from ultraviolet light to UV-visible light after N dopant. The combination with g-C3N4 further enhances the absorption range of N-ZnO, thereby increasing the utilization of light. A Z-scheme photocatalytic system mechanism of N-ZnO/g-C3N4 has been proposed for the enhanced H-2 evolution and photocatalytic degradation rate. The proper bands position of N-ZnO facilitates the formation of Z-scheme mechanism. The electrons on CB of N-ZnO would migrate to VB of g-C3N4, which can effectively prevent the recombination of electrons and holes. The generation of electrons in CB of g-C3N4 and accumulation of holes in VB of N-ZnO can improve the photocatalytic efficiency.
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