期刊
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷 24, 期 12, 页码 7521-7530出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1cp05743j
关键词
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资金
- HIT(WH)-Weihai Coconstruction Project [ITGAZMZ001702]
- Shandong Province Natural Science Foundation [ZR2020MA083]
- National Natural Science Foundation of China [11674146]
In this study, doping S into C3N4 and depositing Cu nanoparticles on its surface, a low-cost and high-abundance near-infrared photocatalyst was constructed. The hydrogen evolution rate and apparent quantum efficiency of the photocatalyst were significantly improved through optimization. This interface optimization strategy provides a simple and efficient approach for the construction of efficient near-infrared-driven photocatalysts.
Low-cost and high-abundance Cu nanostructures are potential near-infrared (NIR) surface plasmonic resonance (SPR) photosensitizers for carbon nitride (C3N4) photocatalysts, but their low activity and stability need to be improved. In this article, doping S into C3N4 (S-C3N4) creates anchoring sites for photo-deposited Cu nanoparticles (NPs), and the spontaneous construction of S-Cu bonds is realized between S-C3N4 and Cu NPs. The optimal hydrogen evolution rate of 1.64 mmol g(-1) h(-1) is obtained for S-C3N4-Cu, which is 5.5, 4.6 and 1.7 times that of pure C3N4, S-C3N4 and S-C3N4-Cu, respectively. With further loading of a Pt co-catalyst to confirm the role of Cu NPs and improve the photocatalytic activity of the SCN-Cu, the photocatalytic rate can reach up to 14.34 mmol g(-1) h(-1). Due to the NIR SPR effect of Cu NPs, the apparent quantum efficiency (AQE) of S-C3N4-Cu at 600 and 765 nm is 2.02% and 0.47%, respectively. The enhanced photocatalytic performance of S-C3N4-Cu compared with C3N4-Cu is mainly due to the introduced S-Cu bonds that improve the injection rate of hot electrons. This solution provides a simple and efficient interface optimization strategy for the construction of efficient NIR-driven photocatalysts.
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