期刊
ACS APPLIED MATERIALS & INTERFACES
卷 7, 期 18, 页码 9630-9637出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b01212
关键词
plasmonic photocatalyst; Au/Pt/g-C3N4; visible light; photocatalytic activity
资金
- National Natural Science Foundation of China [21376051, 21306023, 21106017]
- Natural Science Foundation of Jiangsu [BK20131288]
- Fund Project for Transformation of Scientific and Technological Achievements of Jiangsu Province of China [BA2014100]
- Fundamental Research Funds for the Central Universities [3207045301]
A novel plasmonic photocatalyst, Au/Pt/g-C3N4, was prepared by a facile calcination-photodeposition technique. The samples were characterized by X-ray diffraction, energy-dispersive spectroscopy, transmission electron microscopy, and UV-vis diffuse reflectance spectroscopy, and the results demonstrated that the Au and Pt nanoparticles (7-15 nm) were well-dispersed on the surfaces of g-C3N4. The Au/Pt codecorated g-C3N4 heterostructure displayed enhanced photocatalytic activity for antibiotic tetracycline hydrochloride (TC-HCl) degradation, and the degradation rate was 3.4 times higher than that of pure g-C3N4 under visible light irradiation. The enhancement of photocatalytic activity could be attributed to the surface plasmon resonance effect of Au and electron-sink function of Pt nanoparticles, which improve the optical absorption property and photogenerated charge carriers separation of g-C3N4, synergistically facilitating the photocatalysis process. Finally, a possible photocatalytic mechanism for degrading TC-HCl by Au/Pt/g-C3N4 heterostructure was tentatively proposed.
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