Preparation and visible-light driven photocatalytic activity of the rGO/TiO<sub>2</sub>/BiOI heterostructure for methyl orange degradation

JIN Yu-han; LI Chun-mei; ZHANG Yan-feng

doi:10.1016/S1872-5805(20)60496-6

Volume 35 Issue 4

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Article Navigation > New Carbon Mater. > 2020 > 35(4): 394-400

JIN Yu-han, LI Chun-mei, ZHANG Yan-feng. Preparation and visible-light driven photocatalytic activity of the rGO/TiO2/BiOI heterostructure for methyl orange degradation. New Carbon Mater., 2020, 35(4): 394-400. doi: 10.1016/S1872-5805(20)60496-6

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JIN Yu-han, LI Chun-mei, ZHANG Yan-feng. Preparation and visible-light driven photocatalytic activity of the rGO/TiO₂/BiOI heterostructure for methyl orange degradation. New Carbon Mater., 2020, 35(4): 394-400. doi: 10.1016/S1872-5805(20)60496-6

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Preparation and visible-light driven photocatalytic activity of the rGO/TiO₂/BiOI heterostructure for methyl orange degradation

doi: 10.1016/S1872-5805(20)60496-6

National Demonstration Center for Experimental Chemistry Education, Hebei Key Laboratory of Inorganic Nanomaterials, College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang 050024, China

Funds: National Natural Science Foundation of China (11179029), Key Projects of Education Department of Hebei Province (ZD2018019), Technical Innovation Fund of Hebei Normal University (L2017K05).

Received Date: 2020-05-10
Rev Recd Date: 2020-07-10
Publish Date: 2020-08-28

Abstract

Abstract

Reduced graphene oxide (rGO)/TiO₂/BiOI ternary composites with different Bi/Ti molar ratios were prepared by a hydrothermal method. Their photocatalytic activities were investigated using methyl orange as a simulated pollutant. SEM, XRD, UV-vis diffuse reflectance spectroscopy, XPS and electrochemical tests were used to characterize their microstructures, light absorption properties and the mobility of photogenerated carriers. Results show that under visible light irradiation, the rGO/TiO₂/BiOI composite with a Bi/Ti molar ratio of 80% exhibits a highest degradation rate of 98% for methyl orange within 20 min. The TiO₂ nanoparticles are uniformly attached to BiOI nanosheets that are stacked on rGO sheets to form a heterostructure. The heterostructured rGO/TiO₂/BiOI has strong visible light absorption, which improves the separation efficiency of the photogenerated carriers and accelerates the carrier migration rate, thus increasing the photocatalytic activity of the catalyst.
- rGO/TiO₂/BiOI,
- Heterojunction,
- Photocatalytic activity

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References(19)

References

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