Two Different Roles of Metallic Ag on Ag/AgX/BiOX (X = Cl, Br) Visible Light Photocatalysts: Surface Plasmon Resonance and Z-Scheme Bridge

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• 作者：Liqun Ye ; Jinyan Liu ; Chuqing Gong ; Lihong Tian ; Tianyou Peng ; Ling Zan
• 刊名：ACS Catalysis
• 出版年：2012
• 出版时间：August 3, 2012
• 年：2012
• 卷：2
• 期：8
• 页码：1677-1683
• 全文大小：506K
• 年卷期：v.2,no.8(August 3, 2012)
• ISSN：2155-5435

文摘

Ag/AgX/BiOX (X = Cl, Br) three-component visible-light-driven (VLD) photocatalysts were synthesized by a low-temperature chemical bath method and characterized by X-ray diffraction patterns, X-ray photoelectron spectroscopy, field emission scanning electron microscopy, transmission electron microscopy, high-resolution transmission electron microscopy, and UV鈥搗is diffuse reflectance spectra. The Ag/AgX/BiOX composites showed enhanced VLD photocatalytic activity for the degradation of rhodamine B, which was much higher than Ag/AgX and BiOX. The photocatalytic mechanisms were analyzed by active species trapping and superoxide radical quantification experiments. It revealed that metallic Ag played a different role for Ag/AgX/BiOX VLD photocatalysts, surface plasmon resonance for Ag/AgCl/BiOCl, and the Z-scheme bridge for Ag/AgBr/BiOBr.

Keywords:

Ag; AgX; BiOX; SPR; Z-scheme