Synthesis and photocatalytic performance of Ag-TiVOX nanocomposite

A silver, vanadium and silver/vanadium doped titanium dioxide (TiO2, Ag-TiO2, V-TiO2 and Ag-TiVOX) nanocomposite photocatalyst was achieved via a modify sol–gel and hydrothermal method. Structural analysis by X-Ray Diffraction (XRD) depicted the lattice fringes for both anatase and rutile in its cry...

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Main Authors: Mahubedu Khutso Ntobeng, Patrick Ehi Imoisili, Ten-Chien Jen
Format: Article
Language:English
Published: Elsevier 2020-10-01
Series:Journal of King Saud University: Science
Subjects:
Online Access:http://www.sciencedirect.com/science/article/pii/S1018364720302603
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spelling doaj-04640fd15d46450589ca1acca19d20502020-11-25T04:00:45ZengElsevierJournal of King Saud University: Science1018-36472020-10-0132731033110Synthesis and photocatalytic performance of Ag-TiVOX nanocompositeMahubedu Khutso Ntobeng0Patrick Ehi Imoisili1Ten-Chien Jen2University of Johannesburg, Johannesburg, Kingsway and University Road, Auckland Park, 2092, P. O. Box 524, Auckland Park, 2006, Johannesburg, South AfricaUniversity of Johannesburg, Johannesburg, Kingsway and University Road, Auckland Park, 2092, P. O. Box 524, Auckland Park, 2006, Johannesburg, South AfricaCorresponding author.; University of Johannesburg, Johannesburg, Kingsway and University Road, Auckland Park, 2092, P. O. Box 524, Auckland Park, 2006, Johannesburg, South AfricaA silver, vanadium and silver/vanadium doped titanium dioxide (TiO2, Ag-TiO2, V-TiO2 and Ag-TiVOX) nanocomposite photocatalyst was achieved via a modify sol–gel and hydrothermal method. Structural analysis by X-Ray Diffraction (XRD) depicted the lattice fringes for both anatase and rutile in its crystalline phase in the synthesized nanocomposites. Surface areas (SBET) analysis shows that surface area of synthesized Ag-TiVOX is 46.01 m2/g, compare to TiO2 64.75 m2/g, Ag-TiO2 61.33 m2/g and V-TiO2 62.73 m2/g. Optical absorption results demonstrated by UV–Visible Spectroscopy (UV–Vis) shows that the effects of Ag and V doping was a shift in spectrum to the visible light region, enhancing the visible light absorption capacity of the synthesized photocatalyst. The optical absorption of Ag-TiVOX achieved a reduced bandgap energy of 2.2 eV, as compared to Ag-TiO2 (2.8 eV), V-TiO2 (2.3 eV) and TiO2 (2.9 eV). Morphological characterization by Transition Electron Microscope (TEM) and Scanning Electron Microscope (SEM), depicting a cluster composed of spherical aggregates particles of non-uniform diameter nanoparticles with particle size ranging between 10 and 50 nm. Synthesized Ag-TiVOx demonstrated remarkable photocatalytic capabilities under visible light irradiation, as 99.83 percent of methylene blue (MB) degradation was accomplished during the first 15 min. Impact of Ag and V doping of TiO2 showed enhancement in the photocatalytic activity, reporting excellent removal rates and achieving well desirable decline in the band gap energy.http://www.sciencedirect.com/science/article/pii/S1018364720302603TitaniumNanocompositeMethylene bluePhotocatalystBand gap
collection DOAJ
language English
format Article
sources DOAJ
author Mahubedu Khutso Ntobeng
Patrick Ehi Imoisili
Ten-Chien Jen
spellingShingle Mahubedu Khutso Ntobeng
Patrick Ehi Imoisili
Ten-Chien Jen
Synthesis and photocatalytic performance of Ag-TiVOX nanocomposite
Journal of King Saud University: Science
Titanium
Nanocomposite
Methylene blue
Photocatalyst
Band gap
author_facet Mahubedu Khutso Ntobeng
Patrick Ehi Imoisili
Ten-Chien Jen
author_sort Mahubedu Khutso Ntobeng
title Synthesis and photocatalytic performance of Ag-TiVOX nanocomposite
title_short Synthesis and photocatalytic performance of Ag-TiVOX nanocomposite
title_full Synthesis and photocatalytic performance of Ag-TiVOX nanocomposite
title_fullStr Synthesis and photocatalytic performance of Ag-TiVOX nanocomposite
title_full_unstemmed Synthesis and photocatalytic performance of Ag-TiVOX nanocomposite
title_sort synthesis and photocatalytic performance of ag-tivox nanocomposite
publisher Elsevier
series Journal of King Saud University: Science
issn 1018-3647
publishDate 2020-10-01
description A silver, vanadium and silver/vanadium doped titanium dioxide (TiO2, Ag-TiO2, V-TiO2 and Ag-TiVOX) nanocomposite photocatalyst was achieved via a modify sol–gel and hydrothermal method. Structural analysis by X-Ray Diffraction (XRD) depicted the lattice fringes for both anatase and rutile in its crystalline phase in the synthesized nanocomposites. Surface areas (SBET) analysis shows that surface area of synthesized Ag-TiVOX is 46.01 m2/g, compare to TiO2 64.75 m2/g, Ag-TiO2 61.33 m2/g and V-TiO2 62.73 m2/g. Optical absorption results demonstrated by UV–Visible Spectroscopy (UV–Vis) shows that the effects of Ag and V doping was a shift in spectrum to the visible light region, enhancing the visible light absorption capacity of the synthesized photocatalyst. The optical absorption of Ag-TiVOX achieved a reduced bandgap energy of 2.2 eV, as compared to Ag-TiO2 (2.8 eV), V-TiO2 (2.3 eV) and TiO2 (2.9 eV). Morphological characterization by Transition Electron Microscope (TEM) and Scanning Electron Microscope (SEM), depicting a cluster composed of spherical aggregates particles of non-uniform diameter nanoparticles with particle size ranging between 10 and 50 nm. Synthesized Ag-TiVOx demonstrated remarkable photocatalytic capabilities under visible light irradiation, as 99.83 percent of methylene blue (MB) degradation was accomplished during the first 15 min. Impact of Ag and V doping of TiO2 showed enhancement in the photocatalytic activity, reporting excellent removal rates and achieving well desirable decline in the band gap energy.
topic Titanium
Nanocomposite
Methylene blue
Photocatalyst
Band gap
url http://www.sciencedirect.com/science/article/pii/S1018364720302603
work_keys_str_mv AT mahubedukhutsontobeng synthesisandphotocatalyticperformanceofagtivoxnanocomposite
AT patrickehiimoisili synthesisandphotocatalyticperformanceofagtivoxnanocomposite
AT tenchienjen synthesisandphotocatalyticperformanceofagtivoxnanocomposite
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