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Catalysis Letters

, Volume 148, Issue 7, pp 2179–2189 | Cite as

Enhanced Photocatalytic Performance of Hierarchical ZnFe2O4/g-C3N4 Heterojunction Composite Microspheres

  • Yuehan Wu
  • Yu Wang
  • Andi Di
  • Xu Yang
  • Gang Chen
Article
  • 186 Downloads

Abstract

Semiconductor photocatalysts with suitable band gap for fair response to visible light and efficient separation of electron–hole pairs, are the key to practical application of photocatalytic technology. Magnetically separable hierarchical ZnFe2O4/g-C3N4 composite photocatalysts were prepared by a facile solvothermal method combined with a subsequent annealing process. The composite microspheres were composed of ZnFe2O4 nanoparticles, whose diameter was restricted due to the confined space effect from g-C3N4 nanosheets. ZnFe2O4/g-C3N4 heterojunction structures led to the improvement of the efficiency for photodegrading methylene blue and rhodamine B under visible light, where the kinetic constant over ZnFe2O4/CN-150 photocatalyst was more than ten times larger than that over pure ZnFe2O4. The photogenerated electrons from g-C3N4 surfaces could easily migrate to ZnFe2O4, leading to efficient separation of electron–hole pairs. Also, the composite photocatalyst possessed a chemical stability against photocorrosion and a magnetic property, which made it magnetically separable and reusable conveniently.

Graphical Abstract

Keywords

ZnFe2O4 g-C3N4 Composite photocatalyst Hierarchical structures Heterojunction structures 

Notes

Acknowledgements

This work was financially supported by projects of National Natural Science Foundation of China (21403046).

Compliance with Ethical Standards

Conflict of interest

The authors declare no competing financial interest.

Supplementary material

10562_2018_2376_MOESM1_ESM.docx (7 mb)
Supplementary material 1 (DOCX 7173 KB)

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.MIIT Key Laboratory of Critical Materials Technology, for New Energy Conversion and Storage, School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbinChina
  2. 2.Department of ChemistryUniversity of BathBathUK

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