▎ 摘 要
Ag2CO3 coupled with graphene-oxide composites were prepared by a facile one-step synthesis. The samples were characterized by Scanning electron microscopy (SEM), energy dispersive spectrometer (EDS), Transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), diffuse reflectance spectroscopy (DRS), Fourier transformed infrared (FT-IR) spectroscopy and Raman spectra. The as-prepared graphene-oxide/Ag2CO3 (GO/Ag2CO3) exhibited universally high photocatalytic activity toward typical methylene blue (MB) and methyl orange (MO) in aqueous solution. A possible photocatalytic mechanism was investigated by a series of radical trapping experiment. The kinetics of the GO/Ag2CO3 composites were also proposed. The result showed that GO might serve as an electron collector and a transporter to promote the separation of photoexcited electron-hole pairs and to decrease the possibility of electron and hole recombination efficiently. This work has set up a simple method for exploring the excellent GO-based photocatalysts. (C) 2014 Elsevier B.V. All rights reserved.