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Photocatalytic activity of rutile/anatase TiO 2 nanorod/nanobranch thin film loaded with Au@Ag@Au core double shell nanoparticles

Daneshvar e Asl, S ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.1016/j.jphotochem.2019.05.006
  3. Publisher: Elsevier B.V , 2019
  4. Abstract:
  5. A seeding-growth approach was used to prepare Au@Ag@Au core double shell nanoparticles which were loaded on a rutile-nanorods/anatase-nanobranches thin film via the impregnation method. The thin film was synthesized on a fluorine-doped SnO 2 substrate via three stages of (i)TiCl 4 treatment, (ii)hydrothermal, and (iii)aqueous chemistry. The photocatalytic capability of the newly developed nanostructure was higher than P25 TiO 2 thin film by 40% under visible light and by 100% under UV light irradiation. Photogenerated charges separation at the junctions of rutile-nanorods and anatase-nanobranches along with localized surface plasmon resonance followed by the hot electron transfer from the core double shell nanoparticles to TiO 2 resulted in the enhancement of photocatalytic activity observed under visible light irradiation. Under UV light illumination, the charge separation effect plus the electron trapping by Au@Ag@Au nanoparticles were responsible for the photocatalytic performance improvement of TiO 2 . © 2019 Elsevier B.V
  6. Keywords:
  7. Au@Ag@Au core double shell ; Energy band engineering ; Nanobranched nanorod ; Photocatalytic activity ; Rutile/anatase TiO 2 ; Surface plasmon resonance
  8. Source: Journal of Photochemistry and Photobiology A: Chemistry ; Volume 380 , 2019 ; 10106030 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S1010603019302904