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Journal of Materials Science

, Volume 54, Issue 7, pp 5343–5358 | Cite as

Chemical reduction implanted oxygen vacancy on the surface of 1D MoO3−x/g-C3N4 composite for boosted LED light-driven photoactivity

  • Liying Huang
  • Fei Zhang
  • Yeping Li
  • Hao Wang
  • Qian Wang
  • Chaobao Wang
  • Hui Xu
  • Huaming Li
Chemical routes to materials
  • 39 Downloads

Abstract

There is an important demand for cheap and efficient photocatalysts for dual functional applications. In the study, we report novel 1D MoO3−x/g-C3N4 composite using ethanol as a reducing agent to introduce oxygen vacancy (Ov). The presence of oxygen vacancy has been confirmed by X-ray photoelectron (XPS), electron spin resonance spectra and redox experiments. Compared with MoO3−x, g-C3N4 and fully oxidized MoO3/g-C3N4, the proposed MoO3−x/g-C3N4 composite exhibited a higher photoactivity, effectively degrading methyl orange in 100 min and completely inactivating Escherichia coli in 15 min under visible light-emitting diode irradiation. Trapping experiments demonstrated that holes (h+) and superoxide radicals (·O2−) were the major active species involved in the photocatalytic process. The enhanced photoactivity was attributed to: (1) broadening of the light absorption range associated with the oxygen vacancy, which also served as electron mediators, facilitating the separation of electron–hole pairs, and (2) the 1D nanostructure of MoO3−x, which increased the lifetime of charge carriers. The results provide evidence of the advantages of the introduction of oxygen vacancy with a view to broadening the applications of this photocatalyst.

Notes

Acknowledgements

The authors genuinely appreciate the financial support of this work from the National Nature Science Foundation of China (21406094, 21476097 and 21476098), Postdoctoral Foundation of China (2015M571693) and Foundation of Jiangsu University (14JDG184). This study was supported by the high-performance computing platform of Jiangsu University.

Supplementary material

10853_2018_3227_MOESM1_ESM.docx (1.3 mb)
Supplementary material 1 (DOCX 1312 kb)

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Authors and Affiliations

  1. 1.School of Chemistry and Chemical EngineeringJiangsu UniversityZhenjiangPeople’s Republic of China
  2. 2.School of PharmacyJiangsu UniversityZhenjiangPeople’s Republic of China
  3. 3.Institute for Energy ResearchJiangsu UniversityZhenjiangPeople’s Republic of China

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