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Frontiers of Materials Science

, Volume 12, Issue 4, pp 379–391 | Cite as

Electrospun titania fibers by incorporating graphene/Ag hybrids for the improved visible-light photocatalysis

  • Zhongchi Wang
  • Gongsheng Song
  • Jianle Xu
  • Qiang Fu
  • Chunxu Pan
Research Article
  • 11 Downloads

Abstract

A novel graphene/Ag nanoparticles (NPs) hybrid (prepared by a physical method (PM)) was incorporated into electrospun TiO2 fibers to improve visible-lightdriven photocatalytic properties. The experimental study revealed that the graphene/Ag NPs (PM) hybrid not only decreased the bandgap energy of TiO2, but also enhanced its light response in the visible region due to the surface plasmon resonance (SPR) effect. In addition, compared with those of TiO2 fibers incorporating the graphene/Ag NPs hybrid (prepared by a chemical method (CM)), TiO2-graphene/Ag NPs (PM) fibers exhibited a higher surface photocurrent density and superior photocatalytic performance, i.e., the visible-light-driven photocatalytic activity was enhanced by 2 times. The main reasons include a lower surface defect density of the graphene/Ag NPs (PM) hybrid, a smaller particle size (10 nm) and a higher dispersity of Ag NPs, which promote the rapid transfer of photoexcited charge carriers and inhibit the recombination of photogenerated electrons and holes. It is expected that this kind of ternary electrospun fibers will be a promising candidate for applications in water splitting, solar cells, CO2 conversion and optoelectronic devices, etc.

Keywords

TiO2–graphene/Ag electrospining photocatalysis 

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Notes

Acknowledgements

This work was supported by the Shenzhen Science and Technology Innovation Committee 2017 basic research (free exploration) project of Shenzhen City of China (No. JCYJ20170303170542173), the National Natural Science Foundation of China (Grant No. 11174227), and the Chinese Universities Scientific Fund.

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Copyright information

© Higher Education Press and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Zhongchi Wang
    • 1
    • 2
  • Gongsheng Song
    • 1
    • 2
  • Jianle Xu
    • 1
  • Qiang Fu
    • 1
    • 3
  • Chunxu Pan
    • 1
    • 2
    • 3
  1. 1.School of Physics and Technology, and MOE Key Laboratory of Artificial Micro- and Nano-structuresWuhan UniversityWuhanChina
  2. 2.Shenzhen Research InstituteWuhan UniversityShenzhenChina
  3. 3.Center for Electron MicroscopyWuhan UniversityWuhanChina

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