期刊
ACS OMEGA
卷 5, 期 4, 页码 2027-2033出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsomega.9b04135
关键词
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资金
- National Natural Science Foundation of China [21603065]
- Hunan Provincial Natural Science Foundation of China [2019JJ50012]
- Project of Science and Technology Bureau of Hengyang City [2018KJ131]
- Key Laboratory of Functional Metal-Organic Compounds of Hunan Province [MO18K04]
- Scientific Research Fund of Hunan Provincial Education Department [18A336]
- Aid Programs for Science and Technology Innovative Research Team on Functional Organometallic Compounds in Higher Educational Institution of Hunan Province
- Academician Expert Workstation of Hunan Province
Donor-pi bridge-acceptor (D-pi-A) organic dyes, well studied in dye-sensitized solar cells (DSSCs), are found to possess great potential in light-inducing hydrogen evolution due to their distinguished light-harvesting ability and suitable electron energy level. In this work, multicarbazole-based organic dyes (2C, 3C, 4C) were used as photosensitizers of Pt/TiO2 for photocatalytic hydrogen evolution (PHE) from water under visible light irradiation. 3C-Pt/TiO2 shows the best photocatalytic activity among the three dye-sensitized photocatalysts, with a hydrogen evolution rate of 24.7 mu mol h(-1) and a turnover number of 247 h(-1). The activity of 3C-Pt/TiO2 declines significantly after 3 h irradiation. The deactivation was caused by the partial degradation of the electron acceptor, cyanoacrylate moiety, during the photocatalytic process, which was evidenced by UV-vis, Fourier transform infrared spectra (FT-IR), NMR, and mass spectra. This work is expected to contribute toward the understanding of stability issues of organic dyes and the development of more efficient and steady dyes for hydrogen evolution from water splitting.
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