Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 5, Issue 9, Pages 7670-7677Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.7b01043
Keywords
Water splitting; Visible light; Noble-metal-free cocatalyst; CdS; g-C3N4
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Funding
- National Science Funds for Creative Research Groups of China [51421006]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT13061]
- National Science Fund for Distinguished Young Scholars [51225901]
- National Science Fundation of China for Excellent Young Scholars [51422902]
- Key Program of National Natural Science Foundation of China [41430751]
- National Natural Science Foundation of China [51579073]
- Natural Science Foundation of Jiangsu Province [BK20141417]
- Fundamental Research Funds [2016B43814]
- PAPD
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Photocatalytic decomposition of water to hydrogen is an energy conversion process just like photosynthesis. Herein, for the first time, CoP-modified CdS/g-C3N4 composite nanorods were synthesized on the basis of the concept of combining heterojunction engineering with cocatalyst modification. The obtained CoP-CdS/g-C3N4 composites exhibit excellent photocatalytic activity and good photostability when applied as a photocatalyst for water reduction. The H-2 production rate reaches up to 23 536 mu mol g(-1) h(-1), which was about 14 times higher than that of pure CdS. Furthermore, the stability of the composite was obviously improved. The outstanding performance of the CoP-CdS/g-C3N4 composites can be attributed to the following reasons: (1) Intimate contact between CdS and g-C3N4 can effectively promote the electron hole pair spacial separation. (2) The introduction of CoP as cocatalyst on the CdS/g-C3N4 nanorods can further extract photogenerated electrons from CdS/g-C3N4 and lower the overpotential of H+ reduction.
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