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Synthesis and Photochemical Properties of Monolithic TiO(2) Nanowires Diode
In this paper, the structural and photochemical properties of a monolithic photochemical diode are discussed. The present structure is composed, from the top to the bottom, of a TiO(2) nanowire layer, a TiO(2) film, a Ti foil, and a porous layer made of Pt nanoparticles. The synthesis of the nanowir...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8232246/ https://www.ncbi.nlm.nih.gov/pubmed/34203577 http://dx.doi.org/10.3390/molecules26123636 |
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author | Zimbone, Massimo Cantarella, Maria Impellizzeri, Giuliana Battiato, Sergio Calcagno, Lucia |
author_facet | Zimbone, Massimo Cantarella, Maria Impellizzeri, Giuliana Battiato, Sergio Calcagno, Lucia |
author_sort | Zimbone, Massimo |
collection | PubMed |
description | In this paper, the structural and photochemical properties of a monolithic photochemical diode are discussed. The present structure is composed, from the top to the bottom, of a TiO(2) nanowire layer, a TiO(2) film, a Ti foil, and a porous layer made of Pt nanoparticles. The synthesis of the nanowires was simply carried out by Au-catalysed-assisted process; the effects of the annealing temperature and time were deeply investigated. Morphological and structural characterizations were performed by scanning electron microscopy and Raman spectroscopy. The analyses showed the rutile structure of the TiO(2) nanowires. The photocatalytic properties were studied through the degradation of methylene blue (MB) dye under UV light irradiation. The nanowires induced an enhancement of the photo-degradation rate, compared to TiO(2) in a bulk form, due to an increase in the surface area. Moreover, the presence of a nano-porous Pt layer deposited on the rear side of the samples provided a further increase in the MB degradation rate, related to the scavenging effect of Pt nanoparticles. The overall increment of the photo-activity, due to the nano-structuration of the TiO(2) and to the presence of the Pt layer, resulted a factor 7, compared to the bulk reference. In addition, photovoltage measurements allowed to assess the effects of TiO(2) nano-structuration and Pt nanoparticles on the electron accumulation. |
format | Online Article Text |
id | pubmed-8232246 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-82322462021-06-26 Synthesis and Photochemical Properties of Monolithic TiO(2) Nanowires Diode Zimbone, Massimo Cantarella, Maria Impellizzeri, Giuliana Battiato, Sergio Calcagno, Lucia Molecules Article In this paper, the structural and photochemical properties of a monolithic photochemical diode are discussed. The present structure is composed, from the top to the bottom, of a TiO(2) nanowire layer, a TiO(2) film, a Ti foil, and a porous layer made of Pt nanoparticles. The synthesis of the nanowires was simply carried out by Au-catalysed-assisted process; the effects of the annealing temperature and time were deeply investigated. Morphological and structural characterizations were performed by scanning electron microscopy and Raman spectroscopy. The analyses showed the rutile structure of the TiO(2) nanowires. The photocatalytic properties were studied through the degradation of methylene blue (MB) dye under UV light irradiation. The nanowires induced an enhancement of the photo-degradation rate, compared to TiO(2) in a bulk form, due to an increase in the surface area. Moreover, the presence of a nano-porous Pt layer deposited on the rear side of the samples provided a further increase in the MB degradation rate, related to the scavenging effect of Pt nanoparticles. The overall increment of the photo-activity, due to the nano-structuration of the TiO(2) and to the presence of the Pt layer, resulted a factor 7, compared to the bulk reference. In addition, photovoltage measurements allowed to assess the effects of TiO(2) nano-structuration and Pt nanoparticles on the electron accumulation. MDPI 2021-06-15 /pmc/articles/PMC8232246/ /pubmed/34203577 http://dx.doi.org/10.3390/molecules26123636 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Zimbone, Massimo Cantarella, Maria Impellizzeri, Giuliana Battiato, Sergio Calcagno, Lucia Synthesis and Photochemical Properties of Monolithic TiO(2) Nanowires Diode |
title | Synthesis and Photochemical Properties of Monolithic TiO(2) Nanowires Diode |
title_full | Synthesis and Photochemical Properties of Monolithic TiO(2) Nanowires Diode |
title_fullStr | Synthesis and Photochemical Properties of Monolithic TiO(2) Nanowires Diode |
title_full_unstemmed | Synthesis and Photochemical Properties of Monolithic TiO(2) Nanowires Diode |
title_short | Synthesis and Photochemical Properties of Monolithic TiO(2) Nanowires Diode |
title_sort | synthesis and photochemical properties of monolithic tio(2) nanowires diode |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8232246/ https://www.ncbi.nlm.nih.gov/pubmed/34203577 http://dx.doi.org/10.3390/molecules26123636 |
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