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Abstract:
Graphene oxide (GO) was firstly fabricated from graphite powder by Hummers method. Then a series of GO/Ag 2 CO 3 composite photocatalysts (0.1% GO/Ag 2 CO 3 , 0.5%GO/Ag 2 CO 3 , 1%GO/Ag 2 CO 3 , 4%GO/Ag 2 CO 3 ) were synthesized by a facile liquid deposition process. The produced products were characterized by powder X-ray diffraction (XRD), N 2 physical adsorption, scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscope (FT-IR), Raman spectra and UV-vis diffuse reflectance spectroscopy (UV-vis DRS). The photocatalytic activity of the samples was evaluated by photocatalytic degradation of methyl orange (MO) under visible light irradiation. The influence of GO concentration on the photocatalytic activity of GO/Ag 2 CO 3 was investigated. The results showed that GO can be easily dispersed into Ag 2 CO 3 , producing well contacted GO/Ag 2 CO 3 composite. Coupling of trace GO largely enhanced the visible light absorption. Moreover, GO could suppress the growth of Ag 2 CO 3 grain crystals. With optimum GO content (0.5%), the degradation rate of MO is 85.37% after 120 min light irradiation, which Exhibits 1.53 times activity of that of pure Ag 2 CO 3 . More importantly, a large improvement in stability was obtained over the composite. The increase in photocatalytic activity and stability could be mainly attributed to the coupling of GO which increased the surface area and suppressed the recombination rate of e - /h + pairs. © 2015 Elsevier B.V. All rights reserved.
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Applied Surface Science
ISSN: 0169-4332
Year: 2015
Volume: 358
Page: 168-174
Language: English
3 . 1 5
JCR@2015
6 . 3 0 0
JCR@2023
ESI HC Threshold:335
JCR Journal Grade:1
CAS Journal Grade:2
Cited Count:
SCOPUS Cited Count: 75
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 4
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