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Journal of Materials Science

, Volume 54, Issue 8, pp 6488–6499 | Cite as

Carbon quantum dots decorated BiVO4 quantum tube with enhanced photocatalytic performance for efficient degradation of organic pollutants under visible and near-infrared light

  • Guanlong Wang
  • Weiqiang Zhang
  • Jiayi Li
  • Xiaoli Dong
  • Xiufang ZhangEmail author
Energy materials

Abstract

Photocatalysis has been regarded as a sustainable and efficient technology for removing refractory pollutants in water. However, the performance of photocatalysis is usually limited by the fast recombination of photoinduced electron–holes and the narrow range of spectrum absorption. In this work, the visible-light-sensitive BiVO4 quantum tube (q-BiVO4) was decorated with the carbon quantum dots (CQDs) possessing unique upconversion fluorescence function for enhanced photocatalytic degradation of organic pollutants. Under visible light (λ > 420 nm) and even near-infrared light (λ > 700 nm) irradiation, the CQDs/q-BiVO4 composite displayed significantly enhanced performance compared with q-BiVO4 alone for the degradation of phenol and rhodamine B (RhB). The CQDs/q-BiVO4 with 2% CQDs loading exhibited the best performance, whose kinetic constants for phenol and RhB degradation were 3.0 and 2.4 times higher than that on q-BiVO4. The outstanding photocatalytic performance of CQDs/q-BiVO4 was ascribed to the quantum-sized BiVO4 and the dual function of CQDs, which not only served as the electron acceptor to separate the photoinduced electron–holes in q-BiVO4, but also improved the light absorption of q-BiVO4 through converting the near-infrared light into visible light. This work provides new insight into designing high-efficiency photocatalyst for enhanced environmental remediation.

Notes

Acknowledgements

This work was supported by the National Natural Science Foundation of China (Project No. 21577008), National Natural Science Foundation of China (Project No. 21878031) and Fundamental Research Funds for Central Universities (Project No. 2016J004).

Compliance with ethical standards

Conflict of interest

There are no conflicts to declare.

Supplementary material

10853_2019_3316_MOESM1_ESM.docx (181 kb)
Supplementary material 1 (DOCX 180 kb)

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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.School of Light Industry and Chemical EngineeringDalian Polytechnic UniversityDalianChina

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