화학공학소재연구정보센터
Separation and Purification Technology, Vol.190, 278-287, 2018
Preparation and photocatalytic properties of visible light driven Ag-AgBr-RGO composite
A visible light responsive photocatalyst (Ag-AgBr-RGO) consisting of Ag-AgBr composite dispersed over reduced graphene oxide (RGO) was synthesized via a facile method. The as-prepared samples were characterized by Xray diffraction (XRD), Scanning electron microscopy (SEM), Transmission electron microscopy (TEM), Nitrogen adsorption-desorption measurements, X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectrum measurements (FTIR), and UV visible diffused reflectance spectra (UV vis DRS). The photocatalytic activity of the composite was evaluated by degradation of rhodamine B (RhB) and p-nitrophenol (PNP) under visible light irradiation. The results indicated that the Ag-AgBr-RGO catalyst showed more enhanced photo catalytic activity and stability than the pure Ag-AgBr. The excellent photocatalytic activity of Ag-AgBr-RGO catalyst could be attributed to the heterojunctions among three materials (Ag, AgBr and RGO). Finally, a possible photo-degradation mechanism was postulated based on the tests of photoactive radicals.