Preparation of graphene/TiO<sub>2</sub> composites and study on degradation of methyl blue

Gao Wei; Wang Jun; Li Yufeng; Tang Weiwei; Zhang Zhe

doi:10.7513/j.issn.1004-7638.2022.02.009

Volume 43 Issue 2

May 2022

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Gao Wei, Wang Jun, Li Yufeng, Tang Weiwei, Zhang Zhe. Preparation of graphene/TiO2 composites and study on degradation of methyl blue[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(2): 56-61. doi: 10.7513/j.issn.1004-7638.2022.02.009

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Gao Wei, Wang Jun, Li Yufeng, Tang Weiwei, Zhang Zhe. Preparation of graphene/TiO₂ composites and study on degradation of methyl blue[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(2): 56-61. doi: 10.7513/j.issn.1004-7638.2022.02.009

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Preparation of graphene/TiO₂ composites and study on degradation of methyl blue

doi: 10.7513/j.issn.1004-7638.2022.02.009

1.
School of Biology and Chemistry Engineering, Panzhihua University, Panzhihua, 617000, Sichuan, China
2.
College of Materials Science and Engineering, Heilongjiang University of Science and Technology, Harbin 150022, Heilongjiang, China

Received Date: 2021-11-06
Available Online: 2022-05-11
Publish Date: 2022-04-28

Abstract

Abstract

Photocatalytic degradation has become the fastest developing method in the field of wastewater treatment. GN/TiO₂ composites were prepared by sol-gel method in order to improve the photocatalytic performance of TiO₂ and the degradation effect of the composites on methyl blue was studied. The microstructure of the sample was characterized by XRD and SEM. The effects of calcination temperature, calcination time and the content of graphene on the photocatalytic performance of GN/TiO₂ composites were investigated. The experimental results show that TiO₂ is spherical with a size of 70～200 nm and distributing on the lamellar and edge of the graphene. When kept at 500 ℃ for 20 min and the concentration of graphene is 5%, the material has the best photocatalytic performance on the degradation rate of methyl blue with the value of 87.21%. Moreover, the reutilization rate and the mechanism of photocatalytic degradation of methyl blue by GN/TiO₂ composites were studied, and the results show that the degradation rate of methyl blue is reduced by 17.64% after 5 times repeated.
- graphene/TiO₂composites,
- sol-gel method,
- photocatalytic,
- methylene blue,
- degradation rate

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References(20)

References

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