Au-Ag/TiO2 Thin Films Preparation by Laser Ablation and Sputtering Plasmas for Its Potential Use as Photoanodes in Electrochemical Advanced Oxidation Processes (EAOP)

Titanium dioxide (TiO2) is widely used, studied, and synthesized using different methodologies. By a modification of the material, it can be applied to wastewater treatment. A combined sputtering-laser ablation setup was used to deposit TiO2 thin films m...

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Autores principales:	Luis Alejandro Martínez-Chávez, Eric Mauricio Rivera-Muñoz, Rodrigo Rafael Velázquez-Castillo, Luis Escobar-Alarcón, Karen Esquivel
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	sputtering laser ablation thins films titanium oxide photo-electrocatalysis Chemical technology TP1-1185 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/1ac2a161015a4f14b903c553537c0a76
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spelling	oai:doaj.org-article:1ac2a161015a4f14b903c553537c0a762021-11-25T17:06:52ZAu-Ag/TiO<sub>2</sub> Thin Films Preparation by Laser Ablation and Sputtering Plasmas for Its Potential Use as Photoanodes in Electrochemical Advanced Oxidation Processes (EAOP)10.3390/catal111114062073-4344https://doaj.org/article/1ac2a161015a4f14b903c553537c0a762021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4344/11/11/1406https://doaj.org/toc/2073-4344Titanium dioxide (TiO<sub>2</sub>) is widely used, studied, and synthesized using different methodologies. By a modification of the material, it can be applied to wastewater treatment. A combined sputtering-laser ablation setup was used to deposit TiO<sub>2</sub> thin films modified, individually and simultaneously, with gold (Au) and silver (Ag). To investigate the effect of the metal incorporation in titanium and its impact on the photocatalytic activity, with dye discoloration as a pollutant compound model, the deposited films were characterized by UV–Vis, photoluminescence, and Raman spectroscopies, as well as by parallel beam X-ray diffraction. The results showed that films with different Au and Ag loads, and an 18 nm average crystallite size, were obtained. These metals have an essential effect on the deposited film’s compositional, structural, and optical properties, directly reflected in its photocatalytic activity. The photocatalytic test results using UV-Vis showed that, after 1 h of applying a 4.8 V electric voltage, a discoloration of up to 80% of malachite green (MG) was achieved, using ultraviolet (UV) light.Luis Alejandro Martínez-ChávezEric Mauricio Rivera-MuñozRodrigo Rafael Velázquez-CastilloLuis Escobar-AlarcónKaren EsquivelMDPI AGarticlesputteringlaser ablationthins filmstitanium oxidephoto-electrocatalysisChemical technologyTP1-1185ChemistryQD1-999ENCatalysts, Vol 11, Iss 1406, p 1406 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	sputtering laser ablation thins films titanium oxide photo-electrocatalysis Chemical technology TP1-1185 Chemistry QD1-999
spellingShingle	sputtering laser ablation thins films titanium oxide photo-electrocatalysis Chemical technology TP1-1185 Chemistry QD1-999 Luis Alejandro Martínez-Chávez Eric Mauricio Rivera-Muñoz Rodrigo Rafael Velázquez-Castillo Luis Escobar-Alarcón Karen Esquivel Au-Ag/TiO<sub>2</sub> Thin Films Preparation by Laser Ablation and Sputtering Plasmas for Its Potential Use as Photoanodes in Electrochemical Advanced Oxidation Processes (EAOP)
description	Titanium dioxide (TiO<sub>2</sub>) is widely used, studied, and synthesized using different methodologies. By a modification of the material, it can be applied to wastewater treatment. A combined sputtering-laser ablation setup was used to deposit TiO<sub>2</sub> thin films modified, individually and simultaneously, with gold (Au) and silver (Ag). To investigate the effect of the metal incorporation in titanium and its impact on the photocatalytic activity, with dye discoloration as a pollutant compound model, the deposited films were characterized by UV–Vis, photoluminescence, and Raman spectroscopies, as well as by parallel beam X-ray diffraction. The results showed that films with different Au and Ag loads, and an 18 nm average crystallite size, were obtained. These metals have an essential effect on the deposited film’s compositional, structural, and optical properties, directly reflected in its photocatalytic activity. The photocatalytic test results using UV-Vis showed that, after 1 h of applying a 4.8 V electric voltage, a discoloration of up to 80% of malachite green (MG) was achieved, using ultraviolet (UV) light.
format	article
author	Luis Alejandro Martínez-Chávez Eric Mauricio Rivera-Muñoz Rodrigo Rafael Velázquez-Castillo Luis Escobar-Alarcón Karen Esquivel
author_facet	Luis Alejandro Martínez-Chávez Eric Mauricio Rivera-Muñoz Rodrigo Rafael Velázquez-Castillo Luis Escobar-Alarcón Karen Esquivel
author_sort	Luis Alejandro Martínez-Chávez
title	Au-Ag/TiO<sub>2</sub> Thin Films Preparation by Laser Ablation and Sputtering Plasmas for Its Potential Use as Photoanodes in Electrochemical Advanced Oxidation Processes (EAOP)
title_short	Au-Ag/TiO<sub>2</sub> Thin Films Preparation by Laser Ablation and Sputtering Plasmas for Its Potential Use as Photoanodes in Electrochemical Advanced Oxidation Processes (EAOP)
title_full	Au-Ag/TiO<sub>2</sub> Thin Films Preparation by Laser Ablation and Sputtering Plasmas for Its Potential Use as Photoanodes in Electrochemical Advanced Oxidation Processes (EAOP)
title_fullStr	Au-Ag/TiO<sub>2</sub> Thin Films Preparation by Laser Ablation and Sputtering Plasmas for Its Potential Use as Photoanodes in Electrochemical Advanced Oxidation Processes (EAOP)
title_full_unstemmed	Au-Ag/TiO<sub>2</sub> Thin Films Preparation by Laser Ablation and Sputtering Plasmas for Its Potential Use as Photoanodes in Electrochemical Advanced Oxidation Processes (EAOP)
title_sort	au-ag/tio<sub>2</sub> thin films preparation by laser ablation and sputtering plasmas for its potential use as photoanodes in electrochemical advanced oxidation processes (eaop)
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/1ac2a161015a4f14b903c553537c0a76
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Au-Ag/TiO<sub>2</sub> Thin Films Preparation by Laser Ablation and Sputtering Plasmas for Its Potential Use as Photoanodes in Electrochemical Advanced Oxidation Processes (EAOP)

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