Plasmonic-enhanced photocatalysis reactions using gold nanostructured films

Ibrahem, M.A., Rasheed, B.G., Mahdi, R.I., Khazal, T.M., Omar, M.M. and O'Neill, M. ORCID: 0000-0002-0232-5250, 2020. Plasmonic-enhanced photocatalysis reactions using gold nanostructured films. RSC Advances, 10 (38), pp. 22324-22330.

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Abstract

This work shows the enhancement of the visible photocatalytic activity of TiO2 NPs film using the localized surface plasmonic resonance of Au nanostructures. We adopted a simple yet effective surface treatment to tune the size distribution, and plasmonic resonance spectrum of Au nanostructured films on glass substrates, by hot plate annealing in air at low temperatures. A hybrid photocatalytic film of TiO2:Au is utilized to catalyse a selective photodegradation reaction of Methylene Blue in solution. Irradiation at the plasmonic resonance wavelength of the Au nanostructures provides more effective photodegradation compared to broadband artificial sunlight of significantly higher intensity. This improvement is attributed to the active contribution of the plasmonic hot electrons injected into the TiO2. The broadband source initiates competing photoreactions in the photocatalyst, so that carrier transfer from the catalyst surface to the solution is less efficient. The proposed hybrid photocatalyst can be integrated with a variety of device architectures and designs, which makes it highly attractive for low-cost photocatalysis applications.

Item Type: Journal article
Publication Title: RSC Advances
Creators: Ibrahem, M.A., Rasheed, B.G., Mahdi, R.I., Khazal, T.M., Omar, M.M. and O'Neill, M.
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
Volume: 10
Number: 38
Identifiers:
NumberType
10.1039/d0ra03858jDOI
1352570Other
Rights: This journal is © The Royal Society of Chemistry 2020. Open Access Article. Published on 10 June 2020. Downloaded on 11/10/2020 3:06:47 PM. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
Divisions: Schools > School of Science and Technology
Record created by: Linda Sullivan
Date Added: 13 Aug 2020 08:21
Last Modified: 11 Nov 2020 09:47
URI: http://irep.ntu.ac.uk/id/eprint/40446

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