TiO₂ nanocomposite with reduced graphene oxide through facile blending and its photocatalytic behavior for hydrogen evolution

详细信息    查看全文

• 作者：Fuyun Pei ; Yingliang Liu ; Li Zhang ; Shengping Wang ; Shengang Xu ; ^{xusg@zzu.edu.cn} ; Shaokui Cao ; ^{caoshaokui@zzu.edu.cn}
• 关键词：A. Composites ; A. Nanostructures ; A. Optical materials ; B. Chemical synthesis
• 刊名：Materials Research Bulletin
• 出版年：2013
• 出版时间：August, 2013
• 年：2013
• 卷：48
• 期：8
• 页码：2824-2831
• 全文大小：1384 K

文摘

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.