Three-dimensional Z-scheme AgCl/Ag/γ-TaON heterostructural hollow spheres for enhanced visible-light photocatalytic performance

Jungang Hou, Chao Yang, Zheng Wang, Qinghuan Ji, Yitong Li, Guochao Huang, Shuqiang Jiao, Hongmin Zhu

研究成果: Article

69 引用 (Scopus)

抜粋

Three-dimensional plasmonic Ag-AgCl/γ-TaON composites have been successfully synthesized by anchoring Ag-AgCl nanocrystals on the surfaces of monoclinic γ-TaON hollow urchin-like spheres via the deposition-precipitation method and photo-reduction process. The as-prepared samples were characterized by X-ray diffraction, scanning electron microscope, transmission electron microscope, Brunauer-Emmett-Teller analysis, X-ray photoelectron spectra and UV-vis diffuse reflectance spectrum. The interleaved nanoneedles assembled in the hierarchical floriated γ-TaON hollow spheres contributed to the stable deposition of Ag/AgCl nanocrystals and the formation of effective nanojunctions. The effects of the amount of Ag-AgCl nanocrystals and the photo-reduction time upon the photocatalytic properties for the Ag-AgCl/γ-TaON composites were systematically investigated. Inspiringly, the hierarchical AgCl/Ag/γ-TaON hollow composite photocatalyst in the Z-scheme system has the superior photocatalytic performance than γ-TaON hollow spheres and conventional β-TaON nanocrystals over the degradation of rhodamine B and acid orange 7 dyes and the reduction of aqueous Cr(VI), which is attributed to the effective charge transfer from plasmon-excited Ag nanocrystal to TaON, leading to the low recombination rates of the photoinduced electron-hole pairs. X-ray photoelectron spectroscopy analyses indicated that both AgCl and Ag0 components coexist in the system, and the as-prepared composite is relatively stable. This work could provide new insights into the fabrication of hierarchically plasmonic photocatalysts with high performance and facilitate their practical application in environmental issues.

元の言語English
ページ(範囲)579-589
ページ数11
ジャーナルApplied Catalysis B: Environmental
142-143
DOI
出版物ステータスPublished - 2013 10 1
外部発表Yes

ASJC Scopus subject areas

  • Catalysis
  • Environmental Science(all)
  • Process Chemistry and Technology

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