Hierarchically Plasmonic Z-Scheme Photocatalyst of Ag/AgCl Nanocrystals Decorated Mesoporous Single-Crystalline Metastable Bi20TiO32 Nanosheets

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• 作者：Jungang Hou ; Zheng Wang ; Chao Yang ; Weilin Zhou ; Shuqiang Jiao ; Hongmin Zhu
• 刊名：The Journal of Physical Chemistry C
• 出版年：2013
• 出版时间：March 14, 2013
• 年：2013
• 卷：117
• 期：10
• 页码：5132-5141
• 全文大小：615K
• 年卷期：v.117,no.10(March 14, 2013)
• ISSN：1932-7455

文摘

The hierarchical photocatalysts of Ag鈥揂gCl@Bi₂₀TiO₃₂ composites have been successfully synthesized by anchoring Ag鈥揂gCl nanocrystals on the surfaces of mesoporous single-crystalline metastable Bi₂₀TiO₃₂ nanosheets via a two-stage strategy for excellent visible-light-driven photocatalytic activities in the Z-scheme system. First, the single-crystalline metastable Bi₂₀TiO₃₂ nanosheets with tetragonal structures were prepared via a facile hydrothermal process in assistance with the post-heat-treatment route using benzyl alcohol. Especially, the mesoporous Bi₂₀TiO₃₂ nanosheets showed high photocatalytic activity for the degradation of rhodamine B dye under visible-light irradiation. Then, the as-prepared mesoporous Bi₂₀TiO₃₂ nanosheets were used as a support for loading Ag鈥揂gCl nanocrystals using the deposition鈥損recipitation method and irradiation鈥搑eduction process to fabricate the Ag鈥揂gCl@Bi₂₀TiO₃₂ composites. Inspiringly, the hierarchical Ag鈥揂gCl@Bi₂₀TiO₃₂ photocatalyst has the higher photocatalytic performance than Ag鈥揂gCl nanocrystals and mesoporous Bi₂₀TiO₃₂ nanosheets over the degradation of rhodamine B and acid orange 7 dyes, which is attributed to the effective charge transfer from plasmon-excited Ag nanocrystal to Bi₂₀TiO₃₂ for the construction of a Z-scheme visible-light photocatalyst. This work could provide new insights into the fabrication of hierarchically plasmonic photocatalysts with high performance and facilitate their practical application in environmental issues.