Jump to main content
Jump to site search


Photocatalytic Synthesis of Gold Nanoparticles Using TiO2 Nanorods: A Mechanistic Investigation

Abstract

Herein, we investigate the mechanism of photocatalytic synthesis of noble metal nanoparticles by reductive photoelectrons generated from semiconductors. To slow down the reaction rate for real-time mechanism study, the oleic acid-capped TiO2 nanorods served as photocatalysts, chloroauric acid dissolved in oleylamine acted as the gold precursor. Based on the experimental results from the in-situ absorption spectrum and corresponding TEM image, we could clarify the photoreduction mechanism: the TiO2 nanorods generate electrons under UV irradiation and provide catalytic centers for the nucleation of gold nanoparticle. Subsequently, the seeded growth of Au nanoparticles is mainly assisted by TiO2 nanorods with continuous reduction of gold precursor. Interestingly, the separation of Au nanoparticles from TiO2 nanorods could be clearly observed. This proposed reaction mechanism may become a convenient understanding of photocatalytic synthesis of noble metal nanoparticles by semiconductors.

Back to tab navigation

Supplementary files

Publication details

The article was received on 02 May 2019, accepted on 05 Aug 2019 and first published on 08 Aug 2019


Article type: Paper
DOI: 10.1039/C9CP02493J
Phys. Chem. Chem. Phys., 2019, Accepted Manuscript

  •   Request permissions

    Photocatalytic Synthesis of Gold Nanoparticles Using TiO2 Nanorods: A Mechanistic Investigation

    Q. Lu, L. Zhu, S. Han, F. Teng, Y. Hou and W. Cao, Phys. Chem. Chem. Phys., 2019, Accepted Manuscript , DOI: 10.1039/C9CP02493J

Search articles by author

Spotlight

Advertisements