Acta Phys. -Chim. Sin. ›› 2013, Vol. 29 ›› Issue (02): 403-410.doi: 10.3866/PKU.WHXB201211022

• CATALYSIS AND SURFACE SCIENCE • Previous Articles     Next Articles

Preparation and Photocatalytic Activity of Rutile TiO2-Graphene Composites

GAN Yong-Ping, QIN Huai-Peng, HUANG Hui, TAO Xin-Yong, FANG Jun-Wu, ZHANG Wen-Kui   

  1. College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310014, P. R. China
  • Received:2012-09-11 Revised:2012-11-01 Published:2013-01-14
  • Supported by:

    The project was supported by the Natural Science Foundation of Zhejiang Province, China (Y4110523, LY12E01003).

Abstract:

In this work, graphene oxide (GO) was prepared from natural flake graphite by the modified Hummers method. A series of composites consisting of rutile TiO2 and graphene (rGO-TiO2) were synthesized via a one-step hydrothermal reaction of graphene oxide and titanium isopropylate. The influence of the amount of graphene oxide on the photocatalytic activity of the rGO-TiO2 composites was studied. The photocatalysts were characterized by Brunauer-Emmett-Teller sorption (BET), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectroscopy, UV-Vis absorbance spectroscopy, and photoluminescence (PL) spectroscopy. The as-formed TiO2 was formed in the rutile phase with a needle-cluster structure, and dispersed uniformly on the surface of graphene sheets. The composites possess higher specific areas than pure rutile TiO2. The photo-degradation performance of Rhodamine B and methyl orange by the rGO-TiO2 composites under ultraviolet and visible light was studied. The results indicated that rGO-TiO2 composites prepared with 0.5 mg·mL-1 of graphene oxide had the greatest photocatalytic activity.

Key words: Rutile TiO2, Graphene, Hydrothermal method, Photocatalysis, Organic pollutants

MSC2000: 

  • O643