• myGriffith
    • Staff portal
    • Contact Us⌄
      • Future student enquiries 1800 677 728
      • Current student enquiries 1800 154 055
      • International enquiries +61 7 3735 6425
      • General enquiries 07 3735 7111
      • Online enquiries
      • Staff phonebook
    View Item 
    •   Home
    • Griffith Research Online
    • Journal articles
    • View Item
    • Home
    • Griffith Research Online
    • Journal articles
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

  • All of Griffith Research Online
    • Communities & Collections
    • Authors
    • By Issue Date
    • Titles
  • This Collection
    • Authors
    • By Issue Date
    • Titles
  • Statistics

  • Most Popular Items
  • Statistics by Country
  • Most Popular Authors
  • Support

  • Contact us
  • FAQs
  • Admin login

  • Login
  • Twins in Cd1-xZnxS solid solution: Highly efficient photocatalyst for hydrogen generation from water

    Author(s)
    Liu, Maochang
    Wang, Lianzhou
    Lu, Gaoqing Max
    Yao, Xiangdong
    Guo, Liejin
    Griffith University Author(s)
    Yao, Xiangdong
    Year published
    2011
    Metadata
    Show full item record
    Abstract
    Cd(1) (x)Zn(x)S solid solution with nano-twin structures are synthesized and exhibit superior photocatalytic activities for H(2) evolution from water under visible light irradiation (lambda >= 430 nm) without noble metal co-catalysts. Such Cd(0.5)Zn(0.5)S nanocrystals show the highest activity for hydrogen evolution with an extremely high apparent quantum yield (AQY = 43%) at 425 nm, achieving a hydrogen evolution rate of 1.79 mmol h(-1) without noble metals. The hydrogen evolution rate of 1.70 mmol h(-1) was achieved under simulated sunlight conditions (without infrared light). The "back to back" potential formed by parallel ...
    View more >
    Cd(1) (x)Zn(x)S solid solution with nano-twin structures are synthesized and exhibit superior photocatalytic activities for H(2) evolution from water under visible light irradiation (lambda >= 430 nm) without noble metal co-catalysts. Such Cd(0.5)Zn(0.5)S nanocrystals show the highest activity for hydrogen evolution with an extremely high apparent quantum yield (AQY = 43%) at 425 nm, achieving a hydrogen evolution rate of 1.79 mmol h(-1) without noble metals. The hydrogen evolution rate of 1.70 mmol h(-1) was achieved under simulated sunlight conditions (without infrared light). The "back to back" potential formed by parallel nano-twins in the Cd(1-x)Zn(x)S crystals can significantly improve the separation of the photo-generated electrons/holes (preventing their recombination) thus enhancing the photocatalytic activity. Photodeposition experiments of noble metals strongly support such a mechanism. It is found that noble metals were selectively photo-deposited at central regions between the twin boundaries. The concentration of free electrons at the central region of twins was markedly higher and the twins can effectively separate the H(2) evolution sites (electrons) from oxidation reaction sites (holes).
    View less >
    Journal Title
    Energy & Environmental Science
    Volume
    4
    Issue
    4
    DOI
    https://doi.org/10.1039/C0EE00604A
    Subject
    Other chemical sciences not elsewhere classified
    Publication URI
    http://hdl.handle.net/10072/44303
    Collection
    • Journal articles

    Footer

    Disclaimer

    • Privacy policy
    • Copyright matters
    • CRICOS Provider - 00233E

    Tagline

    • Gold Coast
    • Logan
    • Brisbane - Queensland, Australia
    First Peoples of Australia
    • Aboriginal
    • Torres Strait Islander