Facile decoration of TiO2 nanoparticles on graphene for solar degradation of organic dye |
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| Institution: | 1. Faculty of Chemical Engineering, Urmia University of Technology, Urmia, Iran;2. Center of Excellence for Color Science and Technology, Tehran, Iran;3. Mineral Processing Research Center, Chemical Engineering Department, Sahand University of Technology, Tabriz, Iran;1. College of Chemistry, Chemical Engineering and Material Science, Soochow University, Suzhou 215123, China;2. School of Biology and Chemical Engineering, Jiaxing University, Jiaxing 314001, China;3. School of Materials and Textile Engineering, Jiaxing University, Jiaxing 314001, China;1. Faculty of Chemical Engineering, Urmia University of Technology, Urmia, Iran;2. Mineral Processing Research Center, Chemical Engineering Department, Sahand University of Technology, Tabriz, Iran;3. Center of Excellence for Color Science and Technology, Tehran, Iran;4. Faculty of Engineering, Islamic Azad University – South Tehran Branch, Tehran, Iran;1. Mineral Processing Research Center, Faculty of Chemical Engineering, Sahand University of Technology, Tabriz, Iran;2. Faculty of Chemical Engineering, Urmia University of Technology, Urmia, Iran;1. Faculty of Chemical Engineering, Urmia University of Technology, Urmia, Iran;2. Mineral Processing Research Center, Chemical Engineering Department, Sahand University of Technology, Tabriz, Iran;3. Center of Excellence for Color Science and Technology, Tehran, Iran;4. Faculty of Engineering, Islamic Azad University South Tehran Branch, Tehran, Iran |
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| Abstract: | The reduced graphene oxide is interesting material for the synthesis of TiO2-based photocatalyst. In the present investigation, blackberry fruit, which contains high levels of anthocyanins and other phenolic compounds, was employed as a reducing agent mainly due to its high antioxidant capacity. The nano-crystalline TiO2 was decorated on different amounts of graphene oxide with sol–gel method and then the photocatalytic activity for degradation of cationic dye was evaluated by UV spectroscopy to achieve the optimum content of graphene oxide. The decoration of anatase nanoparticles on prepared reduced graphene oxide was investigated by X-ray diffraction, scanning and transmission electron microscopy techniques. The new composite gives significantly higher activity when is compared to the compositions fabricated by graphene oxide. The compact layer provides a large TiO2-graphene contact area and reduces the electron recombination. The decoration of TiO2 nanoparticles, 5–10 nm, on the graphene oxide reduced by blackberry juice further improves the dye removal. The results imply that the nanoparticle decoration is the key strategy to increase the degradation capacity. |
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| Keywords: | Organic photodegradation Green technique Nanoparticles Sol-gel |
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