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A graphene sheet (GS) synthetised from natural graphite powder was doped in titanium dioxide (TiO2) through the sol–gel method to improve the photocatalytic activity and magnetic γ-Fe2O3/SiO2 particles were added subsequently to improve recycling and reduce the waste of the catalyst. The morphology, microstructure, absorption spectrum and magnetic property of the γ-Fe2O3/SiO2/GSs/TiO2 composites were...
Visible-light response CoAl2O4, MgFe2O4 and CoFe2O4 spinel nanoparticles were prepared by the inorganic salt sol-gel method, and characterized by using XRD, SEM and UV-Vis. The characterization show that the three photocatalysts were in spinel-type structure with the spherical-like particle size in the range of 3~20 nm. The absorbing wavelengths of the three photocatalysts were larger than 800 nm...
A series of Zn2+ and Eu3+ co-doped TiO2 catalysts were prepared by a modified sol-gel method. The prepared catalysts were characterized by X-ray diffraction (XRD), transmission electron microscopy(TEM) and ultraviolet-visible diffuse reflection spectroscopy(UV-vis DRS). Characteristic results clearly show that all of Zn2+ and Eu3+ co-doped TiO2 samples exclusively consist of primary anatase crystallites,...
Activated carbon (AC) supported titanium dioxide (TiO2 ) photocatalyst (TiO2/AC) was prepared by two-step sol-gel process. Crystal structure, and surface morphology of TiO2/AC were characterized by X-ray diffraction (XRD), N2 adsorption-desorption isotherm measurements (BET) and scanning electron microscopy (SEM), respectively. The results show that average crystal size of TiO2 in 11% TiO2/AC catalyst...
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