Influence of Pd, Pt and Au nanoparticles in the photocatalytic performance of N-TiO 2 support under visible light

Medina, J. C., Warren, Eleanor, Morgan, David ORCID: https://orcid.org/0000-0002-6571-5731, Gow, Isla E. and Edwards, Jennifer ORCID: https://orcid.org/0000-0003-4089-2827 2024. Influence of Pd, Pt and Au nanoparticles in the photocatalytic performance of N-TiO 2 support under visible light. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 382 (2282) , 20230271. 10.1098/rsta.2023.0271

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Abstract

In this article, we report the modification and photocatalytic evaluation of commercial TiO2-P25 under visible light for methyl orange (MO) dye degradation under visible light. The activity of materials doped with N, Pd, Pt and Au on to the TiO2-P25 was evaluated, with optimal photocatalytic performance achieved using Au nanoparticles doped on an N-functionalized titania surface. X-ray diffraction (XRD), physical nitrogen adsorption/desorption isotherm curves, transmission electron microscopy (TEM), diffuse reflectance spectroscopy, scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX) were used to study the structural and textural properties of the samples. The chemical species present in the bulk and surface of the catalysts were identified using X-ray photoelectron spectroscopy (XPS) and microwave plasma-atomic emission spectroscopy. The results show that Au/N-TiO2 photocatalyst presents a remarkable enhanced activity for MO dye degradation, under visible light illumination, reaching 100% after 4 h. The enhanced photocatalytic activity using this composite is attributable to the well-dispersed and small size of Au nanoparticles, large surface area, reduction of band-gap energy and the interaction between nitrogen and Au which promoted a synergistic effect. This article is part of the discussion meeting issue ‘Green carbon for the chemical industry of the future’.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Chemistry
Additional Information:	License information from Publisher: LICENSE 1: URL: http://creativecommons.org/licenses/by/4.0/, Type: open-access
Publisher:	The Royal Society
ISSN:	1364-503X
Funders:	EPSRC
Date of First Compliant Deposit:	23 September 2024
Date of Acceptance:	29 July 2024
Last Modified:	15 Oct 2024 14:32
URI:	https://orca.cardiff.ac.uk/id/eprint/172318

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