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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...
To investigate the photocatalytic activity of metal ion doped TiO2 synthesized with sol-gel auto-igniting synthesis (SAS) method, Ag-TiO2 photocatalyst was synthesized with TiCl4 as raw materials, citric acid as combustion agent, ammonium nitrate as assistant. Methylene blue was degraded with synthesized catalyst illuminated by UV light and sun light separately. Results showed that the photocatalytic...
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...
Textile industry stands out as it produces a large amount of coloured dye effluents which are toxic and biodegradables. Among the different types of dyes used textile industry, 60-70% is azo compound. An extensive research on photocatalysis of TiO2 has attracted significant attention for solving these problems due to its high potential for ensuring the complete destruction of organic compound in the...
Fe(III)/TiO2 catalysts for sonocatalytic degradation of reactive blue 4 (RB4) dye was developed using sol-gel method. The Fe (III) loadings were varied from 0-1.0 mol% with a calcination temperature of 500°C. The degradation performance was conducted using an ultrasonic bath with the power and frequency of 50 W and 35 kHz, respectively. The combination of 0.4 mol% of Fe (III)/TiO2 under ultrasonic...
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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