Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 117, Issue 10, Pages 5132-5141Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp311996r
Keywords
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Funding
- National Natural Science Foundation of China [51102015, 21071014, 51004008]
- Fundamental Research Funds for the Central Universities [FRF-AS-11-002A, FRF-TP-12-023A]
- China Postdoctoral Science Foundation [20110490009]
- Research Fund for the Doctoral Program of Higher Education of China [20110006120027]
- National High Technology Research and Development Program of China (863 Program) [2012AA062302]
- National Basic Research Program of China (973 Program) [2007CB613301]
- Program for New Century Excellent Talents in University [NCET-11-0577]
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The hierarchical photocatalysts of Ag-AgCl@Bi20TiO32 composites have been successfully synthesized by anchoring Ag-AgCl 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-AgCl nanocrystals using the deposition-precipitation method and irradiation-reduction process to fabricate the Ag-AgCl@Bi20TiO32 composites. Inspiringly, the hierarchical Ag Ag-Cl@Bi20TiO32 photocatalyst has the higher photocatalytic performance than Ag-AgCl 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.
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