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Environmental Science and Pollution Research

, Volume 24, Issue 13, pp 12416–12425 | Cite as

Synthesis and photocatalytic performance of reduced graphene oxide–TiO2 nanocomposites for orange II degradation under UV light irradiation

  • Tengfei Li
  • Tiecheng Wang
  • Guangzhou QuEmail author
  • Dongli Liang
  • Shibin Hu
Research Article

Abstract

To enhance the photocatalytic activity of TiO2, reduced graphene oxide–TiO2 (RGO–TiO2) composites with sandwich-like structure were synthesized using a simple solvothermal method. The morphology, crystalline information, and structural property of the photocatalyst were characterized by field emission scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and Fourier transmission infrared spectroscopy. The photocatalytic performances of the RGO–TiO2 composites were evaluated by the degradation of orange II (AO7) in water under UV light irradiation. The results showed that the RGO–TiO2 composites exhibited much higher photocatalytic activity than TiO2 and that the removal efficiency of AO7 could reach above 95% only after 20 min of UV light irradiation under the optimum condition. The improved photocatalytic activity might be attributed to the improved charge transfer and significant separation of the photoinduced electrons and holes in the presence of a two-dimensional graphene network. The results of recycling experiments show that RGO–TiO2 composites have a high photostability, which is expected in the practical application. Radical trapping experiments indicated that ·OH plays a crucial role in the process of AO7 degradation.

Keywords

Graphene TiO2 RGO–TiO2 Photocatalytic Mechanism 

Notes

Acknowledgments

The authors gratefully acknowledge the financial support provided by the National Natural Science Foundation of China (Project No. 21107085). Partial supports by the Natural Science Foundation of Shaanxi Province (Project No. K3320215185) and the Fundamental Research Funds for the Central Universities (Project No. QN2013073) are also acknowledged.

Supplementary material

11356_2017_8927_MOESM1_ESM.doc (292 kb)
ESM 1 (DOC 292 kb)

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Copyright information

© Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  • Tengfei Li
    • 1
  • Tiecheng Wang
    • 1
    • 2
  • Guangzhou Qu
    • 1
    • 2
    Email author
  • Dongli Liang
    • 1
    • 2
  • Shibin Hu
    • 1
    • 2
  1. 1.College of Natural Resources and EnvironmentNorthwest A&F UniversityYanglingPeople’s Republic of China
  2. 2.Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of AgricultureYanglingPeople’s Republic of China

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