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Plasmonic Z-scheme α/β-Bi2O3–Ag–AgCl photocatalyst with enhanced visible-light photocatalytic performance
| Content Provider | Semantic Scholar |
|---|---|
| Author | Cheng, Huijie Hou, Jungang Zhu, Hongmin Guo, Xing-Min |
| Copyright Year | 2014 |
| Abstract | Environmental treatment over bismuth based catalysts due to their appropriate band structure and abundance is a promising process. However, the practical application of single-phase bismuth based catalysts is hindered by serious charge transport limitations. The plasmonic Z-scheme α/β-Bi2O3–Ag–AgCl photocatalysts resolving the drawbacks of single-component photocatalysts have been successfully synthesized by anchoring Ag–AgCl nanocrystals on the surfaces of α/β-Bi2O3 nanowire heterojunctions via the deposition–precipitation method assisted by the photo-reduction process. The as-prepared samples were characterized by a series of techniques, such as X-ray diffraction (XRD), electron microscopy (EM), Brunauer–Emmett–Teller analysis (BET), and UV-vis diffuse reflectance absorption spectra (UV-vis). The effects of the amount and the photo-reduction time of Ag–AgCl nanocrystals on the photocatalytic performance for the α/β-Bi2O3–Ag–AgCl composites were systematically investigated. Inspiringly, the plasmonic α/β-Bi2O3–Ag–10wt% AgCl–30 composites exhibit superior photocatalytic performance compared to α/β-Bi2O3 nanowires for the degradation of Rhodamine B and acid orange 7 dyes due to the effective charge transfer between Ag–AgCl nanocrystals and α/β-Bi2O3 nanowires. On the basis of photocatalytic activity and band structure analysis, a plasmonic Z-scheme photocatalytic mechanism is proposed; namely, two-step visible-light absorption is caused by the localized surface plasmon resonance of metallic Ag nanocrystals and the band gap photoexcitation of α/β-Bi2O3. This work could provide new insights into the fabrication of plasmonic Z-scheme photocatalysts with high performance and facilitate their practical application in environmental remediation issues. |
| Starting Page | 41622 |
| Ending Page | 41630 |
| Page Count | 9 |
| File Format | PDF HTM / HTML |
| DOI | 10.1039/C4RA07938H |
| Volume Number | 4 |
| Alternate Webpage(s) | https://pubs.rsc.org/en/content/getauthorversionpdf/C4RA07938H |
| Alternate Webpage(s) | https://doi.org/10.1039/C4RA07938H |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
