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Photocatalytic Degradation of Methyl Orange and Methylene Blue Dyes by Engineering the Surface Nano-Textures of TiO(2) Thin Films Deposited at Different Temperatures via MOCVD

TiO(2) thin films were deposited on quartz substrates by metal–organic chemical vapor deposition (MOCVD) at temperatures of 250, 350, and 450 °C. X-ray diffraction (XRD) data revealed the production of a pure anatase phase, a decrease in crystallite size, and a textural change as deposition temperat...

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Autores principales: Khalifa, Zaki S., Shaban, Mohamed, Ahmed, Inas A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9922017/
https://www.ncbi.nlm.nih.gov/pubmed/36770827
http://dx.doi.org/10.3390/molecules28031160
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author Khalifa, Zaki S.
Shaban, Mohamed
Ahmed, Inas A.
author_facet Khalifa, Zaki S.
Shaban, Mohamed
Ahmed, Inas A.
author_sort Khalifa, Zaki S.
collection PubMed
description TiO(2) thin films were deposited on quartz substrates by metal–organic chemical vapor deposition (MOCVD) at temperatures of 250, 350, and 450 °C. X-ray diffraction (XRD) data revealed the production of a pure anatase phase, a decrease in crystallite size, and a textural change as deposition temperature increased. Atomic force microscopy (AFM) was used to study the morphological properties and confirm XRD results. UV-Vis.-NIR spectroscopy was used to investigate the optical properties of the samples. The effect of deposition temperature on wettability was investigated using contact angle measurements. Sunlight photocatalytic properties increased with the increase in deposition temperature for methyl orange and methylene blue. Films were post-annealed at 500 °C for 2 h. The effect of annealing on all the above-mentioned properties was explored. The kinetic analysis demonstrated superb agreement with the kinetic pseudo-first-order model. The rate of photocatalytic degradation of MB was ~8, 13, and 12 times that of MO using 250, 350, and 450 °C deposited films, respectively. Photodegradation was found to depend on the specific surface area, type of pollutant, and annealing temperature.
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spelling pubmed-99220172023-02-12 Photocatalytic Degradation of Methyl Orange and Methylene Blue Dyes by Engineering the Surface Nano-Textures of TiO(2) Thin Films Deposited at Different Temperatures via MOCVD Khalifa, Zaki S. Shaban, Mohamed Ahmed, Inas A. Molecules Article TiO(2) thin films were deposited on quartz substrates by metal–organic chemical vapor deposition (MOCVD) at temperatures of 250, 350, and 450 °C. X-ray diffraction (XRD) data revealed the production of a pure anatase phase, a decrease in crystallite size, and a textural change as deposition temperature increased. Atomic force microscopy (AFM) was used to study the morphological properties and confirm XRD results. UV-Vis.-NIR spectroscopy was used to investigate the optical properties of the samples. The effect of deposition temperature on wettability was investigated using contact angle measurements. Sunlight photocatalytic properties increased with the increase in deposition temperature for methyl orange and methylene blue. Films were post-annealed at 500 °C for 2 h. The effect of annealing on all the above-mentioned properties was explored. The kinetic analysis demonstrated superb agreement with the kinetic pseudo-first-order model. The rate of photocatalytic degradation of MB was ~8, 13, and 12 times that of MO using 250, 350, and 450 °C deposited films, respectively. Photodegradation was found to depend on the specific surface area, type of pollutant, and annealing temperature. MDPI 2023-01-24 /pmc/articles/PMC9922017/ /pubmed/36770827 http://dx.doi.org/10.3390/molecules28031160 Text en © 2023 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
Khalifa, Zaki S.
Shaban, Mohamed
Ahmed, Inas A.
Photocatalytic Degradation of Methyl Orange and Methylene Blue Dyes by Engineering the Surface Nano-Textures of TiO(2) Thin Films Deposited at Different Temperatures via MOCVD
title Photocatalytic Degradation of Methyl Orange and Methylene Blue Dyes by Engineering the Surface Nano-Textures of TiO(2) Thin Films Deposited at Different Temperatures via MOCVD
title_full Photocatalytic Degradation of Methyl Orange and Methylene Blue Dyes by Engineering the Surface Nano-Textures of TiO(2) Thin Films Deposited at Different Temperatures via MOCVD
title_fullStr Photocatalytic Degradation of Methyl Orange and Methylene Blue Dyes by Engineering the Surface Nano-Textures of TiO(2) Thin Films Deposited at Different Temperatures via MOCVD
title_full_unstemmed Photocatalytic Degradation of Methyl Orange and Methylene Blue Dyes by Engineering the Surface Nano-Textures of TiO(2) Thin Films Deposited at Different Temperatures via MOCVD
title_short Photocatalytic Degradation of Methyl Orange and Methylene Blue Dyes by Engineering the Surface Nano-Textures of TiO(2) Thin Films Deposited at Different Temperatures via MOCVD
title_sort photocatalytic degradation of methyl orange and methylene blue dyes by engineering the surface nano-textures of tio(2) thin films deposited at different temperatures via mocvd
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9922017/
https://www.ncbi.nlm.nih.gov/pubmed/36770827
http://dx.doi.org/10.3390/molecules28031160
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