Direct photocatalytic conversion of aldehydes to esters using supported gold nanoparticles under visible light irradiation at room temperature

Zhang, Yulin, Xiao, Qi, Bao, Yongsheng, Zhang, Yajing, Bottle, Steven, Sarina, Sarina, Zhaorigetu, Bao, & Zhu, Huai Yong (2014) Direct photocatalytic conversion of aldehydes to esters using supported gold nanoparticles under visible light irradiation at room temperature. The Journal of Physical Chemistry Part C: Nanomaterials, Interfaces and Hard Matter, 118(33), pp. 19062-19069.

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Abstract

Visible light can drive esteri fi cation from aldehydes and alcohols using supported gold nanoparticles (Au/Al 2 O 3 ) as photo- catalysts at ambient temperatures. The gold nanoparticles (AuNPs) absorb visible light due to the localized surface plasmon resonance (LSPR) e ff ect, and the conduction electrons of the AuNPs gain the energy of the incident light. The energetic electrons, which concentrate at the NP surface, facilitate the activation of a range of aldehyde and alcohol substrates. The photocatalytic e ffi ciencies strongly depend on the Au loading, particle sizes of the AuNPs, irradiance, and wavelength of the light irradiation. Finally, a plausible reaction mechanism was proposed, and the Au/Al 2 O 3 catalysts can be reused several times without signi fi cantly losing activity. The knowledge acquired in this study may inspire further studies in new e ffi cient recyclable photocatalysts and a wide range of organic synthesis driven by sunlight.

Impact and interest:

17 citations in Scopus
18 citations in Web of Science®
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ID Code: 88628
Item Type: Journal Article
Refereed: Yes
DOI: 10.1021/jp505552v
ISSN: 1932-7447
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Funding:
Copyright Owner: Copyright 2014 American Chemical Society
Deposited On: 04 Nov 2015 22:43
Last Modified: 02 Sep 2016 04:12

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