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  Integrated Au/TiO2 nanostructured photoanodes for photoelectrochemical organics degradation

Matarrese, R., Mascia, M., Vacca, A., Mais, L., Usai, E. M., Ghidelli, M., et al. (2019). Integrated Au/TiO2 nanostructured photoanodes for photoelectrochemical organics degradation. Catalysts, 9(4): 340. doi:10.3390/catal9040340.

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 Creators:
Matarrese, Roberto1, Author
Mascia, Michele2, Author
Vacca, Annalisa2, Author
Mais, Laura2, Author
Usai, Elisabetta M.2, Author
Ghidelli, Matteo3, 4, Author              
Mascaretti, Luca5, 6, Author              
Bricchi, Beatrice Roberta5, 7, Author              
Russo, Valeria5, 8, Author              
Casari, Carlo Spartaco5, 8, Author              
Libassi, Andrea Li3, 7, Author
Nova, Isabella1, Author
Palmas, Simonetta2, Author
Affiliations:
1Dipartimento di Energia, Laboratorio di Catalisi e Processi Catalitici, Politecnico di Milano, via La Masa 34, I-20156 Milano, Italy, ou_persistent22              
2Università degli studi di Cagliari, Dipartimento di Ingegneria Meccanica, Chimica e dei Materiali, via Marengo 2, 09123 Cagliari, Italy, ou_persistent22              
3Micro- and Nanostructured Materials Laboratory, Department of Energy, Politecnico di Milano, Via Ponzio 34/3, 20133 Milano, Italy, ou_persistent22              
4Thin Films and Nanostructured Materials, Structure and Nano-/ Micromechanics of Materials, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_3274276              
5Micro- and Nanostructured Materials Laboratory, Department of Energy, Politecnico di Milano, via Ponzio 34/3, I-20133, Milano, Italy, ou_persistent22              
6Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacký University Olomouc, Šlechtitelů 27, 783 71, Olomouc, Czech Republic, ou_persistent22              
7Center for Nanoscience and Technology – IIT@Polimi, via Giovanni Pascoli 70/3, 20133 Milano, Italy, ou_persistent22              
8Center for Nanoscience and Technology—IIT@Polimi, via Giovanni Pascoli 70/3, I-20133, Milano, Italy, ou_persistent22              

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 Abstract: In this work, hierarchical Au/TiO 2 nanostructures were studied as possible photoanodes for water splitting and bisphenol A (BPA) oxidation. TiO 2 samples were synthetized by Pulsed Laser Deposition (PLD), while Au nanoparticles (NPs) were differently dispersed (i.e., NPs at the bottom or at the top of the TiO 2 , as well as integrated TiO 2 /Au-NPs assemblies). Voltammetric scans and electrochemical impedance spectroscopy analysis were used to correlate the morphology of samples with their electrochemical properties; the working mechanism was investigated in the dark and in the presence of a light radiation, under neutral pH conditions towards the possible oxidation of both bisphenol A (BPA) and water molecules. Different behavior of the samples was observed, which may be attributed mainly to the distributions of Au NPs and to their dimension as well. In particular, the presence of NPs at the bottom seems to be the crucial point for the working mechanism of the structure, thanks to scattering effects that likely allow to better exploit the radiation. © 2019 by the authors. Licensee MDPI, Basel, Switzerland.

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Language(s): eng - English
 Dates: 2019-04-05
 Publication Status: Published in print
 Pages: -
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 Rev. Type: -
 Identifiers: DOI: 10.3390/catal9040340
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Title: Catalysts
  Abbreviation : Catalysts
Source Genre: Journal
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Publ. Info: Basel : MDPI
Pages: - Volume / Issue: 9 (4) Sequence Number: 340 Start / End Page: - Identifier: ISSN: 2073-4344
CoNE: https://pure.mpg.de/cone/journals/resource/2073-4344