期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 265, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2020.118620
关键词
Graphitic carbon nitride; Hydrogen; Molybdenum phosphide; Noble-metal-free; Photocatalysis; Visible light
资金
- Basic Science Center Program for Ordered Energy Conversion of the National Natural Science Foundation of China [51888103]
- National Natural Science Foundation of China [51302212, 51906197]
- Fundamental Research Funds for the Central Universities
In this work, nanosized MoP was synthetized in a novel phosphorization process at a relatively low temperature under an ambient-air atmosphere and then assembled with g-C3N4 to form MoP/g-C3N4 coupled photocatalyst by a mixing and heat-treating method. Significantly, the obtained noble-metal-free MoP/g-C3N4 photocatalyst showed superior photocatalytic H-2-production activity and excellent stability than most reported noble-metalfree cocatalysts modified g-C3N4. The optimal MoP/g-C3N4 photocatalyst possessed a H-2-production activity of 3868 mu mol h(-1) g(cat)(-1) and the corresponding AQY reached 21.6 % at 405 nm. The incorporation of nanosized MoP into g-C3N4 could broaden the absorption range of visible light, built a conducive highway (Mo(delta(+)) -N (delta(-)) bond) for electrons to transfer from g-C3N4 to MoP, which improved the separation and transportation efficiency of charge carriers, and reduce the energy barrier for hydrogen evolution reaction. This work provided a reliable guideline for designing novel and simple synthetic method for cocatalyst and then constructing cocatalyst/photocatalyst coupled structure.
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