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Enhancement of visible-light photocatalytic activity of Pt supported potassium niobate (Pt-KNbO3) by up-conversion luminescence agent (Er3+:Y3Al5O12) for hydrogen evolution from aqueous methanol solution

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Listed:
  • Guo, Yuwei
  • Li, Yun
  • Li, Shuguang
  • Zhang, Lei
  • Li, Ying
  • Wang, Jun

Abstract

In this paper, a high effective up-conversion luminescence agent (Er3+:Y3Al5O12) is synthesized by sol–gel method, and then its corresponding visible-light photocatalysts (Er3+:Y3Al5O12/Pt-KNbO3) are successfully prepared by hydrothermal and direct mixing methods. For comparison, Er3+:Y3Al5O12, Pt-KNbO3 and Er3+:Y3Al5O12/Pt-KNbO3 are all characterized by XRD (X-ray diffractometer), SEM(scanning electron microscopy) and EDX(energy dispersive X-ray spectroscopy ). At first, the visible-light photocatalytic activity of Er3+:Y3Al5O12/Pt-KNbO3 is examined through photocatalytic hydrogen evolution from aqueous methanol solution under visible-light irradiation. Lastly, the influence factors such as Er3+:Y3Al5O12 and Pt-KNbO3 mass ratio, heat-treated temperature and initial pH value on the visible-light photocatalytic hydrogen evolution activity of Er3+:Y3Al5O12/Pt-KNbO3 are studied. Particularly, Er3+:Y3Al5O12/Pt-KNbO3 catalysts with 0.5:1.0 mass ratio heat-treated at 500 °C in aqueous methanol solution with initial pH = 6.0 show the highest photocatalytic activity in hydrogen evolution from aqueous methanol solution.

Suggested Citation

  • Guo, Yuwei & Li, Yun & Li, Shuguang & Zhang, Lei & Li, Ying & Wang, Jun, 2015. "Enhancement of visible-light photocatalytic activity of Pt supported potassium niobate (Pt-KNbO3) by up-conversion luminescence agent (Er3+:Y3Al5O12) for hydrogen evolution from aqueous methanol solut," Energy, Elsevier, vol. 82(C), pages 72-79.
    • Handle: RePEc:eee:energy:v:82:y:2015:i:c:p:72-79
    DOI: 10.1016/j.energy.2014.12.071
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    References listed on IDEAS

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    1. Bozoglan, Elif & Midilli, Adnan & Hepbasli, Arif, 2012. "Sustainable assessment of solar hydrogen production techniques," Energy, Elsevier, vol. 46(1), pages 85-93.
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    4. Miller, A.I. & Duffey, Romney B., 2005. "Sustainable and economic hydrogen cogeneration from nuclear energy in competitive power markets," Energy, Elsevier, vol. 30(14), pages 2690-2702.
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    1. Tasleem, Sehar & Tahir, Muhammad, 2020. "Current trends in strategies to improve photocatalytic performance of perovskites materials for solar to hydrogen production," Renewable and Sustainable Energy Reviews, Elsevier, vol. 132(C).
    2. Tang, Liang & Wang, Jing & Liu, Xudong & Shu, Xiaoqing & Zhang, Zhaohong & Wang, Jun, 2019. "Fabrication of Z-scheme photocatalyst, Er3+:Y3Al5O12@NiGa2O4-MWCNTs-WO3, and visible-light photocatalytic activity for degradation of organic pollutant with simultaneous hydrogen evolution," Renewable Energy, Elsevier, vol. 138(C), pages 474-488.

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