Chinese Journal of Applied Chemistry ›› 2020, Vol. 37 ›› Issue (5): 570-578.DOI: 10.11944/j.issn.1000-0518.2020.05.190280

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Preparation of Ternary Ho3+-TiO2/Bi Plasmonic Composite Fibers for Photocatalytic H2 Production under Visible Light Irradiation

LI Yuejuna,CAO Tiepinga*(),SUN Daweiab,ZHAO Yanhuia,BAI Benanga   

  1. aCollege of Chemistry,Baicheng Normal University,Baicheng,Jilin 137000,China
    bCollege of Chemistry,Jilin Normal University,Siping,Jilin 136000,China
  • Received:2019-10-21 Accepted:2020-02-19 Published:2020-05-01 Online:2020-04-29
  • Contact: CAO Tieping
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.21573003), the Nation College Students Innovation and Entrepreneurship Training Program(No.201810206003)

Abstract:

Ternary Ho3+-TiO2/Bi plasmonic composite fibers were prepared via hydrothermal method employing electrospun Ho3+-TiO2 nanofibers as the substrate. The composition, morphology and photoelectric properties of the composite fibers were characterized by X-ray diffraction (XRD), X-ray photoelectric spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), ultraviolet-visible diffuse reflection spectrum (UV-Vis DRS) and instantaneous photocurrent. The photocatalytic water splitting for hydrogen evolution was investigated over Ho3+-TiO2/Bi plasmonic composite fibers with triethanolamine as the donor residue. The results showed that Bi nanoparticles formed via reduction of Bi3+ by sodium gluconate during hydrothermal process, meanwhile the heterojunction grew on the Ho3+-TiO2 nanofibers surface. The enhanced photocatalytic activity of the Ho3+-TiO2/Bi plasmonic composites fibers can be further improved, which was mainly attributed to the formation of high-quality heterojunctions between Bi and rare earth Ho3+ doped titanium dioxide. Modification of TiO2 nanofibers effectively improved the photocatalytic activity and stability of the samples under visible light. The highest hydrogen production rate was 43.6 μmol/(g·h).

Key words: metal Bi, plasma, composite fibers, photocatalytic H2 production