期刊
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
卷 467, 期 -, 页码 188-194出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.colsurfa.2014.11.049
关键词
g -C3N4; Ag2CO3; Visible-light; Photocatalyst; Methyl orange (MO)
资金
- National Natural Science Foundations of China [51302251]
- Fundamental Research Funds for the Central Universities [2652013052]
- special co-construction project of Beijing city education committee
- Key Project of Chinese Ministry of Education [107023]
Novel g-C3N4/Ag2CO3 organic-inorganic hybrid photocatalysts have been prepared by a facile in situ precipitation route. The crystal structure and optical property of the as-prepared samples have been characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and diffuse reflection spectroscopy (DRS). The photocatalytic experiments indicated that the as-prepared g-C3N4/Ag2CO3 photocatalyst exhibited significantly enhanced photocatalytic activity than the pure g-C3N4 and Ag2CO3 samples toward degrading methyl orange (MO) under visible light irradiation (lambda > 420 nm). A possible photocatalytic mechanism was proposed based on the photoluminescence (PL) spectra, photocurrent spectra and a series of radical trapping experiments. The remarkably improved photocatalytic performance should be ascribed to the heterostructure between Ag2CO3 and g-C3N4, which greatly promoted the photoinduced charge transfer and inhibited the recombination of electrons and holes. (C) 2014 Elsevier B.V. All rights reserved.
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