Preparation and photocatalytic performance of magnetic TiO2–Fe3O4/graphene (RGO) composites under VIS-light irradiation

The results showed that the TiO2 coated Fe3O4 nanoparticles with a strong response to external magnetic fields were dispersed uniformly on the surface of RGO nanosheets

Zhe-Qi Li; Hui-Long Wang; Long-Yun Zi; Jian-Jun Zhang; Yao-Shan Zhang

2015

Scholarcy highlights

  • TiO2–Fe3O4/grapheme composites with good magnetism and photocatalytic activity were prepared by a facile hydrothermal method with RGO and magnetic TiO2 as starting materials in ethanol–water solvent
  • The structural and magnetic features of the prepared composite photocatalysts were investigated by powder X-ray diffraction, Fourier transform infrared spectra, transmission electron microscopy, thermogravimetric and differential thermogravimetry analysis, UV–vis diffuse reflectance spectra and vibrating sample magnetometry
  • The composite catalysts can cause an obvious red shift of UV–vis spectra compared with pure TiO2
  • The photocatalytic degradation of methylene blue by TiO2–Fe3O4/RGO composites under visible light irradiation was examined by varying the operational parameters such as catalyst amount, irradiation time, pH and initial MB concentration
  • A plausible mechanism was proposed and discussed on the basis of experimental results

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