Magnetically Recoverable TiO2/SiO2/γ-Fe2O3/rGO Composite with Significantly Enhanced UV-Visible Light Photocatalytic Activity

Molecules

卷:25

Reyhaneh Kaveh¹  Andrea Lucotti¹  MariaVittoria Diamanti¹  MariaPia Pedeferri¹  Maryam Mokhtarifar¹  Mojtaba Bagherzadeh² 

[1] Department of Chemistry, Materials and Chemical Engineering, Politecnico di Milano, 20124 Milano, Italy;

[2] Department of Chemistry, Sharif University of Technology, Tehran 145888-9694, Iran;

关键词: TiO₂;    γ-Fe₂O₃;    SiO₂;    reduced graphene oxide;    photocatalysis;    methylene blue;   

DOI  :  10.3390/molecules25132996

来源: DOAJ

【 摘 要 】

In this paper, we report the preparation of a new composite (TiO₂/SiO₂/γ-Fe₂O₃/rGO) with a high photocatalytic efficiency. The properties of the composite were examined by different analyses, including X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM), photoluminescence (PL), UV-Visible light diffuse reflectance spectroscopy, Fourier transform infrared spectroscopy (FTIR), Raman, vibrating-sample magnetometer (VSM), and nitrogen gas physisorption (BET) studies. The photocatalytic efficiency of the proposed composite was evaluated by the degradation of methylene blue under UV and visible light, and the results were compared with titanium dioxide (TiO₂), where degradation increased from 30% to 84% and 4% to 66% under UV and visible light, respectively. The significant increase in photocatalytic activity may be explained by the higher adsorption of dye on the surface of the composite and the higher separation and transfer of charge carriers, which in turn promote active sites and photocatalytic efficiency.

【 授权许可】

Unknown