Self-cleaning of SiO2-TiO2 coating: Effect of sonochemical synthetic parameters on the morphological, mechanical, and photocatalytic properties of the films
Among the different properties of the hydrophobic semiconductor surfaces, self-cleaning promoted by solar illumination is probably one of the most attractive from the technological point of view. The use of sonochemistry for nanomaterials' synthesis has been recently employed for the associated...
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doaj-469a468031c14fc19823a99e119c87cd2021-04-20T05:11:40ZengElsevierUltrasonics Sonochemistry1350-41772021-05-0173105483Self-cleaning of SiO2-TiO2 coating: Effect of sonochemical synthetic parameters on the morphological, mechanical, and photocatalytic properties of the filmsA. Rosales0L. Ortiz-Frade1Iliana E. Medina-Ramirez2Luis A. Godínez3K. Esquivel4Graduate and Research Division, Engineering Faculty, Universidad Autónoma de Querétaro, Cerro de las Campanas, Santiago de Querétaro 76010, Querétro, MexicoCentro de Investigación y Desarrollo Tecnológico en Electroquímica, S.C. Parque, Tecnológico Querétaro Sanfandila, Pedro Escobedo 76703, Querétaro, MexicoChemistry Department, Universidad Autónoma de Aguascalientes, Avenida Universidad No. 94, Ciudad Universitaria, 20131 Aguascalientes, Ags., MexicoCentro de Investigación y Desarrollo Tecnológico en Electroquímica, S.C. Parque, Tecnológico Querétaro Sanfandila, Pedro Escobedo 76703, Querétaro, MexicoGraduate and Research Division, Engineering Faculty, Universidad Autónoma de Querétaro, Cerro de las Campanas, Santiago de Querétaro 76010, Querétro, Mexico; Corresponding author.Among the different properties of the hydrophobic semiconductor surfaces, self-cleaning promoted by solar illumination is probably one of the most attractive from the technological point of view. The use of sonochemistry for nanomaterials' synthesis has been recently employed for the associated shorter reaction times and efficient route for control over crystal growth and the management of the resulting material's photocatalytic properties. Moreover, the sol–gel method coupled to sonochemistry modifies the chemical environment, with reactive species such as •OH and H2O2, which yield a homogeneous synthesis. Therefore, in the following investigation, the sol–gel method was coupled to sonochemistry to synthesize a SiO2@TiO2 composite, for which the sonochemical amplitude of irradiation was varied to determine its effect on the morphology and mechanical and self-cleaning properties. SEM and AFM characterized the samples of SiO2@TiO2 composite, and while the micrographs indicate that a high ultrasonic energy results in an amorphous SiO2@TiO2 composite with a low rugosity, which was affected in the determination of the contact angle on the surface. On the other hand, FTIR analysis suggests a significant change in both SiO2-SiO and SiO2-TiO2 chemical bonds with changes in vibrations and frequency, corroborating an important influence of the sonochemical energy contribution to the hydrolysis process. Raman spectroscopy confirms the presence of an amorphous phase of silicon dioxide; however, the vibrations of TiO2 were not visible. The evaluation of hydrophobic and self-cleaning properties shows a maximum of ultrasonic energy needed to improve the contact angle and rhodamine B (RhB) removal.http://www.sciencedirect.com/science/article/pii/S1350417721000249SonochemistrySiO2@TiO2MorphologyHydrophobic surfacePhotocatalytic surface |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
A. Rosales L. Ortiz-Frade Iliana E. Medina-Ramirez Luis A. Godínez K. Esquivel |
spellingShingle |
A. Rosales L. Ortiz-Frade Iliana E. Medina-Ramirez Luis A. Godínez K. Esquivel Self-cleaning of SiO2-TiO2 coating: Effect of sonochemical synthetic parameters on the morphological, mechanical, and photocatalytic properties of the films Ultrasonics Sonochemistry Sonochemistry SiO2@TiO2 Morphology Hydrophobic surface Photocatalytic surface |
author_facet |
A. Rosales L. Ortiz-Frade Iliana E. Medina-Ramirez Luis A. Godínez K. Esquivel |
author_sort |
A. Rosales |
title |
Self-cleaning of SiO2-TiO2 coating: Effect of sonochemical synthetic parameters on the morphological, mechanical, and photocatalytic properties of the films |
title_short |
Self-cleaning of SiO2-TiO2 coating: Effect of sonochemical synthetic parameters on the morphological, mechanical, and photocatalytic properties of the films |
title_full |
Self-cleaning of SiO2-TiO2 coating: Effect of sonochemical synthetic parameters on the morphological, mechanical, and photocatalytic properties of the films |
title_fullStr |
Self-cleaning of SiO2-TiO2 coating: Effect of sonochemical synthetic parameters on the morphological, mechanical, and photocatalytic properties of the films |
title_full_unstemmed |
Self-cleaning of SiO2-TiO2 coating: Effect of sonochemical synthetic parameters on the morphological, mechanical, and photocatalytic properties of the films |
title_sort |
self-cleaning of sio2-tio2 coating: effect of sonochemical synthetic parameters on the morphological, mechanical, and photocatalytic properties of the films |
publisher |
Elsevier |
series |
Ultrasonics Sonochemistry |
issn |
1350-4177 |
publishDate |
2021-05-01 |
description |
Among the different properties of the hydrophobic semiconductor surfaces, self-cleaning promoted by solar illumination is probably one of the most attractive from the technological point of view. The use of sonochemistry for nanomaterials' synthesis has been recently employed for the associated shorter reaction times and efficient route for control over crystal growth and the management of the resulting material's photocatalytic properties. Moreover, the sol–gel method coupled to sonochemistry modifies the chemical environment, with reactive species such as •OH and H2O2, which yield a homogeneous synthesis. Therefore, in the following investigation, the sol–gel method was coupled to sonochemistry to synthesize a SiO2@TiO2 composite, for which the sonochemical amplitude of irradiation was varied to determine its effect on the morphology and mechanical and self-cleaning properties. SEM and AFM characterized the samples of SiO2@TiO2 composite, and while the micrographs indicate that a high ultrasonic energy results in an amorphous SiO2@TiO2 composite with a low rugosity, which was affected in the determination of the contact angle on the surface. On the other hand, FTIR analysis suggests a significant change in both SiO2-SiO and SiO2-TiO2 chemical bonds with changes in vibrations and frequency, corroborating an important influence of the sonochemical energy contribution to the hydrolysis process. Raman spectroscopy confirms the presence of an amorphous phase of silicon dioxide; however, the vibrations of TiO2 were not visible. The evaluation of hydrophobic and self-cleaning properties shows a maximum of ultrasonic energy needed to improve the contact angle and rhodamine B (RhB) removal. |
topic |
Sonochemistry SiO2@TiO2 Morphology Hydrophobic surface Photocatalytic surface |
url |
http://www.sciencedirect.com/science/article/pii/S1350417721000249 |
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