Journal
CERAMICS INTERNATIONAL
Volume 44, Issue 7, Pages 7473-7480Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2018.01.124
Keywords
TiO2; Graphene; Fe doping; Photocatalysis; Methylene blue
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Funding
- National Natural Science Foundation of China [51579099, 51521006, 51508186]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT-13R17]
- Hunan Provincial Natural Science Foundation of China [2016JJ3076]
- Hunan Provincial Innovation Foundation for Postgraduate [CX2016B134]
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In this study, graphene wrapped Fe-doped TiO2 (G-TiO2-Fe) spheres were prepared through a simple hydro thermal process. The structural, optical and photocatalytic properties of synthesized composite were characterized by field emission scanning electron microscope (FE-SEM), X-ray diffraction (XRD), Raman Microprobe (Raman), X-ray photoelectron spectroscopy (XPS) and UV-Vis diffuse reflectance spectrophotometer (DRS). The G-TiO2-Fe composite showed a significant red-shift in light response edge as compared with TiO2. Meanwhile, the band gap exhibited an obvious decline from 3.24 to 2.99 eV. The photocatalytic capacity of G-TiO2-Fe was further evaluated by methylene blue (MB) degradation experiments, and the results indicated that the optimized G-TiO2-Fe exhibited a remarkable increase in photocatalytic activity. The superior photocatalytic performance of the novel material could be ascribed to the synthetic effects of doped Fe and wrapped graphene shells. The unique geometrical configuration and constructive component which modified the TiO2 electronic structure will largely improve the electron transporting efficiency and restrain the electron-hole recombination.
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