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Preparation of Multicycle GO/TiO2 Composite Photocatalyst and Study on Degradation of Methylene Blue Synthetic Wastewater

1
Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines, Department of Environment Engineering, School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, Liaoning, China
2
School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, Liaoning, China
3
College of Mechatronics and Control Engineering, Shen Zhen University, Shen Zhen 518060, China
*
Author to whom correspondence should be addressed.
Appl. Sci. 2019, 9(16), 3282; https://doi.org/10.3390/app9163282
Received: 5 July 2019 / Revised: 7 August 2019 / Accepted: 7 August 2019 / Published: 10 August 2019
(This article belongs to the Special Issue New Materials and Techniques for Environmental Science)
A series of composite photocatalysts were prepared by using graphene oxide (GO) prepared by modified Hummers method and TiO2 hydrogel prepared by using butyl titanate as raw materials. The composite photocatalyst was characterized through scanning electron microscope(SEM), x ray diffraction (XRD), and Raman spectroscopy, and the degradation effect of pure TiO2 and composite photocatalyst on methylene blue (MB) dye wastewater under different experimental conditions was studied. The results showed that TiO2 in composite photocatalyst was mainly anatase phase and its photocatalytic activity was better than pure TiO2. When the addition of GO reached 15 wt%, the photocatalytic activity was the highest. When 200 mg composite photocatalyst was added to 200 mL synthetic wastewater with a concentration of 10 mg/L and an initial pH of about 8, the degradation rate could reach 95.8% after 2.5 h. It is presumed that the photogenerated charges of GO/TiO2 composite photocatalyst may directly destroy the luminescent groups in the MB molecule and thus decolorize the wastewater, and no other new luminescent groups are generated during the treatment. View Full-Text
Keywords: GO-TiO2; photocatalytic activity; methylene blue; ultraviolet light GO-TiO2; photocatalytic activity; methylene blue; ultraviolet light
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Fu, Z.; Zhang, S.; Fu, Z. Preparation of Multicycle GO/TiO2 Composite Photocatalyst and Study on Degradation of Methylene Blue Synthetic Wastewater. Appl. Sci. 2019, 9, 3282.

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