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Research on Chemical Intermediates

, Volume 44, Issue 5, pp 3061–3079 | Cite as

Enhanced photocatalytic degradation for organic pollutants by a novel m-Bi2O4/Bi2O2CO3 photocatalyst under visible light

  • Junxiu Wang
  • Kuan Chen
  • Yi Shen
  • Xi Wang
  • Yongfu Guo
  • Xiaoji Zhou
  • Renbi Bai
Article

Abstract

To heighten the absorption to visible light and improve photocatalytic degradation to organic pollutants, a novel photocatalyst of m-Bi2O4/Bi2O2CO3 was constructed through a facile hydrothermal method. The crystal structure, optical properties, morphology, composition and photocatalytic ability of the photocatalysts were characterized via X-ray diffraction, Fourier transform infrared spectroscopy, ultraviolet–visible diffuse reflectance spectroscopy, field emission scanning electron microscopy, energy dispersive spectroscopy, transmission electron microscope (TEM), high resolution TEM, selected-area electron diffraction and X-ray photoelectron spectroscopy technologies. The as-prepared photocatalysts could efficiently degrade rhodamine B and mixed dye under visible light. The removal rate was up to 95.3% within 50 min. The results demonstrated that m-Bi2O4/Bi2O2CO3 photocatalysts showed outstanding photocatalytic degradation ability compared to the single photocatalyst with the narrow band gap. In addition, photocurrent response tests certified that the heterostructure of the photocatalysts effectively accelerated the separation and migration of photo-induced electrons and holes. Active species trapping experiments indicated that holes (h+) and superoxide radical (•O2) were major species rather than hydroxyl radicals (•OH) during the degradation process of organics. According to the test results, a probable photocatalytic mechanism was proposed. This work provided a new and efficient photocatalyst for environmental remediation and water treatment.

Graphical Abstract

Keywords

Photocatalysis Degradation Organic pollutant Photocatalyst Mechanism 

Notes

Acknowledgements

This work was supported by the National Natural Science Foundation of China (No. 51578354), the Priority Academic Program Development of Jiangsu Higher Education Institutions, Suzhou Science and Technology Bureau (SS201667), Six Talent Peaks Program (2016-JNHB-067) and Qing Lan Project of Jiangsu Province.

Supplementary material

11164_2018_3293_MOESM1_ESM.docx (99 kb)
Supplementary material 1 (DOCX 99 kb)

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© Springer Science+Business Media B.V., part of Springer Nature 2018

Authors and Affiliations

  1. 1.Center for Separation and Purification Materials and TechnologiesSuzhou University of Science and TechnologySuzhouPeople’s Republic of China

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