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Open AccessArticle

Differently Shaped Au Nanoparticles: A Case Study on the Enhancement of the Photocatalytic Activity of Commercial TiO2

by Zsolt Pap 1,2,3,†, Zsejke Réka Tóth 1,†, Virginia Danciu 1, Lucian Baia 2,4,*,† and Gábor Kovács 1,2,5,†
1
Faculty of Chemistry and Chemical Engineering, Babeș-Bolyai University, Arany János 11, RO-400028 Cluj-Napoca, Romania
2
Faculty of Physics, Babeș-Bolyai University, M. Kogălniceanu 1, RO-400084 Cluj-Napoca, Romania
3
Research Group of Environmental Chemistry, Institute of Chemistry, University of Szeged, H-6720, Szeged, Tisza Lajos krt. 103, Hungary
4
Institute for Interdisciplinary Research on Bio-Nano-Sciences, Babeș-Bolyai University, M. Kogălniceanu 1, RO-400084 Cluj-Napoca, Romania
5
Faculty of Science and Informatics, Department of Applied and Environmental Chemistry, University of Szeged, H-6720, Szeged, Rerrich Béla tér 1, Hungary
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editor: Klara Hernadi
Materials 2015, 8(1), 162-180; https://doi.org/10.3390/ma8010162
Received: 16 October 2014 / Accepted: 24 December 2014 / Published: 31 December 2014
(This article belongs to the Special Issue Photocatalytic Materials)
In the present work, the influence of a gold nanoparticle’s shape was investigated on the commercially available Evonik Aeroxide P25. By the variation of specific synthesis parameters, three differently shaped Au nanoparticles were synthetized and deposited on the surface of the chosen commercial titania. The nanoparticles and their composites’ morphological and structural details were evaluated, applying different techniques such as Diffuse Reflectance Spectroscopy (DRS), X-ray Diffraction (XRD), and Transmission Electron Microscopy (TEM). The influence of the Au nanoparticles’ shape was discussed by evaluating their photocatalytic efficiency on phenol and oxalic acid degradation and by investigating the H2 production efficacy of the selected composites. Major differences in their photocatalytic performance depending on the shape of the deposited noble metal were evidenced. View Full-Text
Keywords: titanium-dioxide; gold nanoparticles; shape-control; photocatalysis; hydrogen production titanium-dioxide; gold nanoparticles; shape-control; photocatalysis; hydrogen production
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Pap, Z.; Tóth, Z.R.; Danciu, V.; Baia, L.; Kovács, G. Differently Shaped Au Nanoparticles: A Case Study on the Enhancement of the Photocatalytic Activity of Commercial TiO2. Materials 2015, 8, 162-180.

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