期刊
MATERIALS RESEARCH BULLETIN
卷 48, 期 8, 页码 2824-2831出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2013.04.018
关键词
Composites; Nanostructures; Optical materials; Chemical synthesis
资金
- National Natural Science Foundation of China (NSFC) [20774088, 20874091]
TRG-COOH nanocomposite is prepared as a photocatalyst for hydrogen evolution by blending TiO2 with reduced graphene oxide (RG-COOH). TRG-COOH is characterized with X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectra, X-ray photoelectron spectroscopy (XPS), atomic force microscope (AFM), and photoluminescent spectra. XPS result shows the reduction of monolayer graphene oxide (GO). The band gap is red-shifted from 3.25 eV for P25, which consists of 20% rutile and 80% anatase, to 2.95 eV for TGO and then to 2.80 eV for TRG-COOH due to the introduction of GO and the reconstruction of conjugated structure. TEM image illustrates that RG-COOH in TRG-COOH is covered and anchored by P25, which blocks the aggregation of TiO2 nanoparticles and the stacking of monolayer graphene. This allows RG-COOH to take a good role of electron-sink and electron-transporting bridge. The photocatalytic efficiency of TRG-COOH is respectively increased under Xenon lamp about 8.9 and 2.7 times compared to P25 and TGO. (C) 2013 Elsevier Ltd. All rights reserved.
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