Journal
NANOMATERIALS
Volume 9, Issue 12, Pages -Publisher
MDPI
DOI: 10.3390/nano9121671
Keywords
titanium dioxide; carbon nano onions; silicon dioxide; rhodamine B; photocatalytic degradation
Categories
Funding
- Key R&D Projects of Shanxi Province (Social Development Field) [201803D31049]
- Natural Science Foundation of Shanxi Province [201801D221341]
- Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi (STIP) [2016147]
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A silicon dioxide/carbon nano onions/titanium dioxide (SiO2/CNOs/TiO2) 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 SiO2/CNOs/TiO2 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 SiO2/CNOs/TiO2(3%) was 1.5 g/L as evidenced by the highest RhB degradation rate (96%). The SiO2/CNOs/TiO2 composite greatly improved the quantum efficiency of TiO2. This work provides a new option for the modification of subsequent nanocomposite oxide nanoparticles.
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