A silicon dioxide/carbon nano onions/titanium dioxide (SiO/CNOs/TiO) composite was synthesized by a simple sol-gel method and characterized by the methods of X-ray diffraction (XRD), scanning electronic microscope (SEM), X-ray photoelectron spectroscopy (XPS), Brunauer-Emmett-Teller (BET), Fourier transform infrared (FTIR), thermogravimetric analysis (TG), differential scanning calorimeter (DSC) and UV-Vis diffuse reflectance spectra (UV-Vis DRS). In this work, the photocatalytic activity of the SiO/CNOs/TiO photocatalyst was assessed by testing the degradation rate of Rhodamine B (RhB) under visible light. The results indicated that the samples exhibited the best photocatalytic activity when the composite consisted of 3% CNOs and the optimum dosage of SiO/CNOs/TiO(3%) was 1.5 g/L as evidenced by the highest RhB degradation rate (96%). The SiO/CNOs/TiO composite greatly improved the quantum efficiency of TiO. This work provides a new option for the modification of subsequent nanocomposite oxide nanoparticles.
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| http://dx.doi.org/10.3390/nano9121671 | DOI Listing |
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