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Ambient controlled synthesis of advanced core-shell plasmonic Ag@ZnO photocatalysts

Journal Article


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Abstract


  • Plasmonic Ag@ZnO core-shell hybrids, including hetero-nanowires and hetero-nanoparticles, have been synthesized at room temperature for application in photocatalysis. The morphology, size, crystal structure, and composition of the products were investigated by X-ray diffraction, scanning and transmission electron microscopy, X-ray photoelectron spectroscopy, and ultraviolet-visible spectroscopy. It was found the concentration of Zn(NO3)2·6H2O and the amount of water play crucial roles in the formation of Ag@ZnO core-shell hybrids. The resultant Ag@ZnO core-shell hybrids exhibit much higher photocatalytic activity and stability towards degradation of organic contaminants than pure ZnO nanocrystals under solar light irradiation. The one-dimensional (1D) core-shell hetero-nanowires prepared under optimal conditions (i.e. 0.6 M Zn(NO3)2·6H2O and 14.5 mL water) exhibit the best photocatalytic performance. The drastic enhancement in photocatalytic activity over the Ag@ZnO core-shell hybrids, especially the 1D core-shell hetero-nanowires, could be attributed to the synergistic effects of the surface ZnO and Ag nanowire cores with the surface plasmon resonance and the electron sink effect, as well as the unique 1D core-shell nanostructure for efficient mass transfer. The possible mechanism for degradation of rhodamine B (RhB) under solar light irradiation was discussed. This work provides a very convenient chemical route to prepare stable and highly efficient solar light driven plasmonic core-shell Ag@ZnO photocatalysts for cost-effective water purification.

Authors


  •   Xiong, Jinyan (external author)
  •   Sun, Qiao (external author)
  •   Chen, Jun
  •   Li, Zhen (external author)
  •   Dou, Shi Xue

Publication Date


  • 2016

Citation


  • Xiong, J., Sun, Q., Chen, J., Li, Z. & Dou, S. (2016). Ambient controlled synthesis of advanced core-shell plasmonic Ag@ZnO photocatalysts. CrystEngComm, 18 (10), 1713-1722.

Scopus Eid


  • 2-s2.0-84959504553

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=6714&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/5686

Has Global Citation Frequency


Number Of Pages


  • 9

Start Page


  • 1713

End Page


  • 1722

Volume


  • 18

Issue


  • 10

Place Of Publication


  • United Kingdom

Abstract


  • Plasmonic Ag@ZnO core-shell hybrids, including hetero-nanowires and hetero-nanoparticles, have been synthesized at room temperature for application in photocatalysis. The morphology, size, crystal structure, and composition of the products were investigated by X-ray diffraction, scanning and transmission electron microscopy, X-ray photoelectron spectroscopy, and ultraviolet-visible spectroscopy. It was found the concentration of Zn(NO3)2·6H2O and the amount of water play crucial roles in the formation of Ag@ZnO core-shell hybrids. The resultant Ag@ZnO core-shell hybrids exhibit much higher photocatalytic activity and stability towards degradation of organic contaminants than pure ZnO nanocrystals under solar light irradiation. The one-dimensional (1D) core-shell hetero-nanowires prepared under optimal conditions (i.e. 0.6 M Zn(NO3)2·6H2O and 14.5 mL water) exhibit the best photocatalytic performance. The drastic enhancement in photocatalytic activity over the Ag@ZnO core-shell hybrids, especially the 1D core-shell hetero-nanowires, could be attributed to the synergistic effects of the surface ZnO and Ag nanowire cores with the surface plasmon resonance and the electron sink effect, as well as the unique 1D core-shell nanostructure for efficient mass transfer. The possible mechanism for degradation of rhodamine B (RhB) under solar light irradiation was discussed. This work provides a very convenient chemical route to prepare stable and highly efficient solar light driven plasmonic core-shell Ag@ZnO photocatalysts for cost-effective water purification.

Authors


  •   Xiong, Jinyan (external author)
  •   Sun, Qiao (external author)
  •   Chen, Jun
  •   Li, Zhen (external author)
  •   Dou, Shi Xue

Publication Date


  • 2016

Citation


  • Xiong, J., Sun, Q., Chen, J., Li, Z. & Dou, S. (2016). Ambient controlled synthesis of advanced core-shell plasmonic Ag@ZnO photocatalysts. CrystEngComm, 18 (10), 1713-1722.

Scopus Eid


  • 2-s2.0-84959504553

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=6714&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/5686

Has Global Citation Frequency


Number Of Pages


  • 9

Start Page


  • 1713

End Page


  • 1722

Volume


  • 18

Issue


  • 10

Place Of Publication


  • United Kingdom