Study on preparation and photocatalytic performance of mint carbon dots/TiO<sub>2</sub> composite photocatalyst

Zhang Ying; Ren Wang; Zheng Xingwen; Zhou Huimian; Qu Xiang; Li Minjiao

doi:10.7513/j.issn.1004-7638.2024.03.011

Volume 45 Issue 3

Jul. 2024

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Zhang Ying, Ren Wang, Zheng Xingwen, Zhou Huimian, Qu Xiang, Li Minjiao. Study on preparation and photocatalytic performance of mint carbon dots/TiO2 composite photocatalyst[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(3): 79-85. doi: 10.7513/j.issn.1004-7638.2024.03.011

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Zhang Ying, Ren Wang, Zheng Xingwen, Zhou Huimian, Qu Xiang, Li Minjiao. Study on preparation and photocatalytic performance of mint carbon dots/TiO₂ composite photocatalyst[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(3): 79-85. doi: 10.7513/j.issn.1004-7638.2024.03.011

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Study on preparation and photocatalytic performance of mint carbon dots/TiO₂ composite photocatalyst

doi: 10.7513/j.issn.1004-7638.2024.03.011

1.
College of Chemistry and Environmental Engineering, Sichuan University of Science and Engineering, Zigong 643000, Sichuan, China
2.
College of Chemical Engineering, Sichuan University of Science and Engineering, Zigong 643000, Sichuan, China

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Received Date: 2024-01-17
Publish Date: 2024-07-02

Abstract

Abstract

In this study, mint powder was employed as biological carbon source to prepare mint carbon dots (mint-CDs)/TiO₂ composite photocatalyst by a one-step hydrothermal method. The structure, morphology, specific surface area and photogenerated charges separation characteristics were carefully investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), Brunauer-Emmett-Teller (BET) method, and surface photovoltage spectroscopy (SPS). Rhodamine B (RhB) was employed as model pollutant to study the photocatalytic activities of mint-CDs/TiO₂ photocatalysts. The results show that mint-CD improve the photocatalytic activity of TiO₂, and superoxide free radical •O₂⁻ is the main active free radical in the photocatalytic degradation reaction. When the mass ratio of mint-CDs/TiO₂ is 2%, the composite photocatalyst demonstrates the maximum photogenerated charges separation efficiency and degradation activity for RhB, and the photocatalytic activity was increased by 2.24 times compared with reference TiO₂.
- composite photocatalyst,
- TiO₂,
- mint powder,
- hydrothermal method,
- photocatalytic performance

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References(24)

References

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