Composites of Laminar Nanostructured ZnO and VOx-Nanotubes Hybrid as Visible Light Active Photocatalysts
A series of hybrid heterostructured nanocomposites of ZnO with V2O5 nanotubes (VOx-NTs) in different mixing ratios were synthesized, with the aim of reducing the recombination of photoinduced charge carriers and to optimize the absorption of visible light. The study was focused on the use of heteros...
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doaj-0716a02e9a4c48c8a91ebd935deedb4b2020-11-24T21:57:47ZengMDPI AGCatalysts2073-43442018-02-01829310.3390/catal8020093catal8020093Composites of Laminar Nanostructured ZnO and VOx-Nanotubes Hybrid as Visible Light Active PhotocatalystsEglantina Benavente0Daniel Navas1Sindy Devis2Marjorie Segovia3Clivia Sotomayor-Torres4Guillermo González5Departamento de Química, Universidad Tecnológica Metropolitana, P.O. Box 9845, Santiago, ChileDepartamento de Química, Universidad Tecnológica Metropolitana, P.O. Box 9845, Santiago, ChileDepartamento de Química, Universidad Tecnológica Metropolitana, P.O. Box 9845, Santiago, ChileDepartment of Chemistry, Faculty of Sciences, Universidad de Chile, P.O. Box 653, Santiago, ChileCatalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB Bellaterra, 08193 Barcelona, SpainDepartment of Chemistry, Faculty of Sciences, Universidad de Chile, P.O. Box 653, Santiago, ChileA series of hybrid heterostructured nanocomposites of ZnO with V2O5 nanotubes (VOx-NTs) in different mixing ratios were synthesized, with the aim of reducing the recombination of photoinduced charge carriers and to optimize the absorption of visible light. The study was focused on the use of heterostructured semiconductors that can extend light absorption to the visible range and enhance the photocatalytic performance of ZnO in the degradation of methylene blue as a model pollutant. The addition of VOx-NTs in the synthesis mixture led to a remarkable performance in the degradation of the model dye, with hybrid ZnO (stearic acid)/VOx-NTs at a ratio of 1:0.06 possessing the highest photocatalytic activity, about seven times faster than pristine zinc oxide. Diffuse reflectance spectroscopic measurements and experiments in the presence of different trapping elements allowed us to draw conclusions regarding the band positions and photocatalytic degradation mechanism. The photocatalytic activity measured in three subsequent cycles showed good reusability as no significant loss in efficiency of dye degradation was observed.http://www.mdpi.com/2073-4344/8/2/93ZnO nanocompositesVOx nanotubesvisible light photocatalystmethylene blue degradation |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Eglantina Benavente Daniel Navas Sindy Devis Marjorie Segovia Clivia Sotomayor-Torres Guillermo González |
spellingShingle |
Eglantina Benavente Daniel Navas Sindy Devis Marjorie Segovia Clivia Sotomayor-Torres Guillermo González Composites of Laminar Nanostructured ZnO and VOx-Nanotubes Hybrid as Visible Light Active Photocatalysts Catalysts ZnO nanocomposites VOx nanotubes visible light photocatalyst methylene blue degradation |
author_facet |
Eglantina Benavente Daniel Navas Sindy Devis Marjorie Segovia Clivia Sotomayor-Torres Guillermo González |
author_sort |
Eglantina Benavente |
title |
Composites of Laminar Nanostructured ZnO and VOx-Nanotubes Hybrid as Visible Light Active Photocatalysts |
title_short |
Composites of Laminar Nanostructured ZnO and VOx-Nanotubes Hybrid as Visible Light Active Photocatalysts |
title_full |
Composites of Laminar Nanostructured ZnO and VOx-Nanotubes Hybrid as Visible Light Active Photocatalysts |
title_fullStr |
Composites of Laminar Nanostructured ZnO and VOx-Nanotubes Hybrid as Visible Light Active Photocatalysts |
title_full_unstemmed |
Composites of Laminar Nanostructured ZnO and VOx-Nanotubes Hybrid as Visible Light Active Photocatalysts |
title_sort |
composites of laminar nanostructured zno and vox-nanotubes hybrid as visible light active photocatalysts |
publisher |
MDPI AG |
series |
Catalysts |
issn |
2073-4344 |
publishDate |
2018-02-01 |
description |
A series of hybrid heterostructured nanocomposites of ZnO with V2O5 nanotubes (VOx-NTs) in different mixing ratios were synthesized, with the aim of reducing the recombination of photoinduced charge carriers and to optimize the absorption of visible light. The study was focused on the use of heterostructured semiconductors that can extend light absorption to the visible range and enhance the photocatalytic performance of ZnO in the degradation of methylene blue as a model pollutant. The addition of VOx-NTs in the synthesis mixture led to a remarkable performance in the degradation of the model dye, with hybrid ZnO (stearic acid)/VOx-NTs at a ratio of 1:0.06 possessing the highest photocatalytic activity, about seven times faster than pristine zinc oxide. Diffuse reflectance spectroscopic measurements and experiments in the presence of different trapping elements allowed us to draw conclusions regarding the band positions and photocatalytic degradation mechanism. The photocatalytic activity measured in three subsequent cycles showed good reusability as no significant loss in efficiency of dye degradation was observed. |
topic |
ZnO nanocomposites VOx nanotubes visible light photocatalyst methylene blue degradation |
url |
http://www.mdpi.com/2073-4344/8/2/93 |
work_keys_str_mv |
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