Silver-Inserted Heterojunction Photocatalysts for Z-Scheme Overall Pure-Water Splitting under Visible-Light Irradiation

详细信息    查看全文

• 作者：Ryoya Kobayashi ; Satoshi Tanigawa ; Toshihiro Takashima ; Bunsho Ohtani ; Hiroshi Irie
• 刊名：Journal of Physical Chemistry C
• 出版年：2014
• 出版时间：October 2, 2014
• 年：2014
• 卷：118
• 期：39
• 页码：22450-22456
• 全文大小：361K
• ISSN：1932-7455

文摘

Overall pure-water splitting under visible-light irradiation was accomplished utilizing a solid-state heterojunction photocatalyst following the Z-scheme mechanism. Zinc rhodium oxide (ZnRh₂O₄) and defective silver antimonate (Ag_1鈥?i>xSbO_3鈥?i>y) as hydrogen (H₂)- and oxygen (O₂)-evolution photocatalysts, respectively, were connected with silver (Ag) to prepare a solid-state Z-scheme photocatalysis system (ZnRh₂O₄/Ag/Ag_1鈥?i>xSbO_3鈥?i>y). In this system, Ag acted as a solid-state electron mediator for the transfer of electrons from the conduction band of Ag_1鈥?i>xSbO_3鈥?i>y to the valence band of ZnRh₂O₄. Utilizing the thus-constructed ZnRh₂O₄/Ag/Ag_1鈥?i>xSbO_3鈥?i>y photocatalyst, the simultaneous liberation of H₂ and O₂ from pure water at a molar ratio of 鈭?:1 was achieved under irradiation with visible light at over 500 nm.