The Efficient Degradation of Bisphenol A with Ozonation Photocatalyzed by TiO<sub>2</sub>-rGO Composites under UV Irradiation

ZHU Ximiao; LIU Jinhua; LIAO Gaozu; LENG Chengmeng; XU Xiaochun; FANG Jianzhang

doi:10.6054/j.jscnun.2022056

Journal of South China Normal University (Natural Science Edition) > 2022 > 54(4): 40-47. > DOI: 10.6054/j.jscnun.2022056

ZHU Ximiao, LIU Jinhua, LIAO Gaozu, LENG Chengmeng, XU Xiaochun, FANG Jianzhang. The Efficient Degradation of Bisphenol A with Ozonation Photocatalyzed by TiO₂-rGO Composites under UV Irradiation[J]. Journal of South China Normal University (Natural Science Edition), 2022, 54(4): 40-47. DOI: 10.6054/j.jscnun.2022056

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The Efficient Degradation of Bisphenol A with Ozonation Photocatalyzed by TiO₂-rGO Composites under UV Irradiation

1.
School of Environment, South China Normal University, Guangzhou 510006, China
2.
Jiangmen Solid Waste Treatment Co., Ltd., Jiangmen 529000, China
3.
Guangdong Lingxiu Technology Co., Ltd., Guangzhou 510530, China

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Received Date: June 16, 2021
Available Online: September 21, 2022

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Abstract

Abstract

TiO₂-rGO composites were synthesized with the liquid phase deposition and calcination method. The as-prepared photocatalysts were characterized with scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffractometer (XRD), specific surface and porosity analyzer (BET) and ultraviolet-visible diffuse reflectance spectrophotometer (UV-Vis DRS). The degradation performance of ozonation photocata-lyzed by TiO₂-rGO was investigated using bisphenol A (BPA) as the model pollutant. The reaction mechanism was further explored through the active species trapping experiment. The results showed that anatase TiO₂ nanoparticles about 20 nm in diameter had been successfully anchored on the surface of graphene. The sample obtained when 0.02 g graphite oxide was added in precursor solution exhibited the highest activity and BPA was completely mineralized within 45 min. The catalytic activity of TiO₂-rGO still showed efficient performance after recycling for five consecutive runs. The catalytic activity of TiO₂-rGO was enhanced owing to the improved separation efficiency of photo-generated charges through the introduction of rGO, which benefited the synergistic degradation of photocata-lysis and ozonation. In the reaction process, holes (h⁺) and hydroxyl radical (·OH)were the main active species and ·OH played a dominant role in BPA degradation.
- TiO₂-rGO,
- photocatalytic ozonation,
- synergism,
- bisphenol A

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References

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The Efficient Degradation of Bisphenol A with Ozonation Photocatalyzed by TiO2-rGO Composites under UV Irradiation

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The Efficient Degradation of Bisphenol A with Ozonation Photocatalyzed by TiO₂-rGO Composites under UV Irradiation