Thermo-Optical Characterization of Cu- and Zr-Modified TiO<sub>2</sub> Photocatalysts by Beam Deflection Spectrometry

Cu/Zr-modified TiO<sub>2</sub> photocatalysts were prepared in the form of nanopowders and characterized by photothermal spectrometry, UV–Vis spectrophotometry and X-ray diffraction (XRD) to investigate the effect of Cu/Zr content on their thermo-optical and transport properties. Adding...

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Autores principales:	Mahmoud Abdelhamid, Dorota Korte, Humberto Cabrera, Olena Pliekhova, Zeinab Ebrahimpour, Urška Lavrenčič Štangar, Mladen Franko
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	photocatalysts TiO<sub>2</sub> Cu/Zr photodegradation material characterization photothermal spectrometry Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/ca782ee927d344b393570a9bd8942f52
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spelling	oai:doaj.org-article:ca782ee927d344b393570a9bd8942f522021-11-25T16:41:26ZThermo-Optical Characterization of Cu- and Zr-Modified TiO<sub>2</sub> Photocatalysts by Beam Deflection Spectrometry10.3390/app1122109372076-3417https://doaj.org/article/ca782ee927d344b393570a9bd8942f522021-11-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/22/10937https://doaj.org/toc/2076-3417Cu/Zr-modified TiO<sub>2</sub> photocatalysts were prepared in the form of nanopowders and characterized by photothermal spectrometry, UV–Vis spectrophotometry and X-ray diffraction (XRD) to investigate the effect of Cu/Zr content on their thermo-optical and transport properties. Adding Cu (0.05%) caused a change in the light absorption range limit, which reduced from 3.25 eV for pure TiO<sub>2</sub> to 2.85 eV for Cu-modified TiO<sub>2</sub>. The decrease in energy band gap was accompanied by a 19.5% decrease in the charge carrier lifetime, which is not favorable for photocatalysis. The decrease in charge carrier lifetime can be minimized by additional modification of TiO<sub>2</sub> with Zr (1%), which showed insignificant effects on the energy band gap of the investigated materials. Furthermore, modification of TiO<sub>2</sub> with Zr affected the material’s structure and increased its specific surface area, which improved the adsorption of degraded compounds as well as the absorption of light. Altogether, these effects resulted in higher photocatalytic degradation rate constants of the investigated TiO<sub>2</sub>-based photocatalyst. It was also found that modification of TiO<sub>2</sub> with Cu and/or Zr increases both the material’s thermal diffusivity and conductivity due to changes in the band gap and structure of material. Beam deflection spectrometry (BDS) has demonstrated high potential in materials’ characterization which stems from its high sensitivity and precision.Mahmoud AbdelhamidDorota KorteHumberto CabreraOlena PliekhovaZeinab EbrahimpourUrška Lavrenčič ŠtangarMladen FrankoMDPI AGarticlephotocatalystsTiO<sub>2</sub>Cu/Zrphotodegradationmaterial characterizationphotothermal spectrometryTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 10937, p 10937 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	photocatalysts TiO<sub>2</sub> Cu/Zr photodegradation material characterization photothermal spectrometry Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
spellingShingle	photocatalysts TiO<sub>2</sub> Cu/Zr photodegradation material characterization photothermal spectrometry Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Mahmoud Abdelhamid Dorota Korte Humberto Cabrera Olena Pliekhova Zeinab Ebrahimpour Urška Lavrenčič Štangar Mladen Franko Thermo-Optical Characterization of Cu- and Zr-Modified TiO<sub>2</sub> Photocatalysts by Beam Deflection Spectrometry
description	Cu/Zr-modified TiO<sub>2</sub> photocatalysts were prepared in the form of nanopowders and characterized by photothermal spectrometry, UV–Vis spectrophotometry and X-ray diffraction (XRD) to investigate the effect of Cu/Zr content on their thermo-optical and transport properties. Adding Cu (0.05%) caused a change in the light absorption range limit, which reduced from 3.25 eV for pure TiO<sub>2</sub> to 2.85 eV for Cu-modified TiO<sub>2</sub>. The decrease in energy band gap was accompanied by a 19.5% decrease in the charge carrier lifetime, which is not favorable for photocatalysis. The decrease in charge carrier lifetime can be minimized by additional modification of TiO<sub>2</sub> with Zr (1%), which showed insignificant effects on the energy band gap of the investigated materials. Furthermore, modification of TiO<sub>2</sub> with Zr affected the material’s structure and increased its specific surface area, which improved the adsorption of degraded compounds as well as the absorption of light. Altogether, these effects resulted in higher photocatalytic degradation rate constants of the investigated TiO<sub>2</sub>-based photocatalyst. It was also found that modification of TiO<sub>2</sub> with Cu and/or Zr increases both the material’s thermal diffusivity and conductivity due to changes in the band gap and structure of material. Beam deflection spectrometry (BDS) has demonstrated high potential in materials’ characterization which stems from its high sensitivity and precision.
format	article
author	Mahmoud Abdelhamid Dorota Korte Humberto Cabrera Olena Pliekhova Zeinab Ebrahimpour Urška Lavrenčič Štangar Mladen Franko
author_facet	Mahmoud Abdelhamid Dorota Korte Humberto Cabrera Olena Pliekhova Zeinab Ebrahimpour Urška Lavrenčič Štangar Mladen Franko
author_sort	Mahmoud Abdelhamid
title	Thermo-Optical Characterization of Cu- and Zr-Modified TiO<sub>2</sub> Photocatalysts by Beam Deflection Spectrometry
title_short	Thermo-Optical Characterization of Cu- and Zr-Modified TiO<sub>2</sub> Photocatalysts by Beam Deflection Spectrometry
title_full	Thermo-Optical Characterization of Cu- and Zr-Modified TiO<sub>2</sub> Photocatalysts by Beam Deflection Spectrometry
title_fullStr	Thermo-Optical Characterization of Cu- and Zr-Modified TiO<sub>2</sub> Photocatalysts by Beam Deflection Spectrometry
title_full_unstemmed	Thermo-Optical Characterization of Cu- and Zr-Modified TiO<sub>2</sub> Photocatalysts by Beam Deflection Spectrometry
title_sort	thermo-optical characterization of cu- and zr-modified tio<sub>2</sub> photocatalysts by beam deflection spectrometry
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/ca782ee927d344b393570a9bd8942f52
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Thermo-Optical Characterization of Cu- and Zr-Modified TiO<sub>2</sub> Photocatalysts by Beam Deflection Spectrometry

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