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

Applied Sciences

Zhongxue Fu¹  Zhongtian Fu²  Song Zhang³ 

[1] College of Mechatronics and Control Engineering, Shen Zhen University, Shen Zhen 518060, China;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;School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, Liaoning, China;

关键词: GO-TiO₂;    photocatalytic activity;    methylene blue;    ultraviolet light;   

DOI  :  10.3390/app9163282

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown