Enhanced photocatalytic and photo-Fenton catalytic activity of BiFeO3 polyhedron decorated by AuAg alloy nanoparticles
AuAg/BiFeO 3 composite was successfully fabricated through a hydrothermal method followed by a photodeposition process. It is found that the AuAg alloy nanoparticles with the diameter of 7–23 nm were uniformly decorated on the polyhedral BiFeO 3 particles, and AuAg/BiFeO 3 composite exhibits stronge...
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Veröffentlicht in: | Journal of materials science. Materials in electronics 2021, Vol.32 (1), p.623-639 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | AuAg/BiFeO
3
composite was successfully fabricated through a hydrothermal method followed by a photodeposition process. It is found that the AuAg alloy nanoparticles with the diameter of 7–23 nm were uniformly decorated on the polyhedral BiFeO
3
particles, and AuAg/BiFeO
3
composite exhibits stronger light absorption in the visible light region than bare BiFeO
3
owing to the SPR effect of AuAg alloy nanoparticles. Acid orange 7 (AO7), phenol and Cr(VI) were employed as target pollutants to estimate the photocatalytic degradation and reduction properties of AuAg/BiFeO
3
under visible light and simulated sunlight illumination. The results reveal that the photocatalytic property of BiFeO
3
in the decomposition of organics (AO7 and phenol) and reduction of Cr(VI) can be remarkably improved after the decoration of AuAg alloy nanoparticles. Furthermore, the photo-Fenton catalytic activity of AuAg/BiFeO
3
composite toward the decomposition of phenol was also estimated under illumination of simulated sunlight, which suggests that the composite exhibits obvious enhanced photo-Fenton catalytic degradation activity in comparison to pure BiFeO
3
. On the other hand, AuAg/BiFeO
3
composite has favorable photocatalytic and photo-Fenton catalytic recyclability. The photoluminescence and photoelectrochemical measurements demonstrate that AuAg/BiFeO
3
composite reveals enhanced separation and migration of photogenerated electrons and holes. The possible catalytic mechanism for AuAg/BiFeO
3
composite was proposed according to above experiments. |
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ISSN: | 0957-4522 1573-482X |
DOI: | 10.1007/s10854-020-04844-z |