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Facet-Dependent Cuprous Oxide Nanocrystals Decorated with Graphene as Durable Photocatalysts under Visible Light

Three morphologies (octahedral, hierarchical and rhombic dodecahedral) of crystal Cu(2)O with different facets ({111}, {111}/{110}, and {110}) incorporating graphene sheets (denoted as o-Cu(2)O-G, h-Cu(2)O-G and r-Cu(2)O-G, respectively) have been fabricated by using simple solution-phase techniques...

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Detalles Bibliográficos
Autores principales: Liu, Shou-Heng, Lu, Jun-Sheng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6027350/
https://www.ncbi.nlm.nih.gov/pubmed/29891796
http://dx.doi.org/10.3390/nano8060423
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author Liu, Shou-Heng
Lu, Jun-Sheng
author_facet Liu, Shou-Heng
Lu, Jun-Sheng
author_sort Liu, Shou-Heng
collection PubMed
description Three morphologies (octahedral, hierarchical and rhombic dodecahedral) of crystal Cu(2)O with different facets ({111}, {111}/{110}, and {110}) incorporating graphene sheets (denoted as o-Cu(2)O-G, h-Cu(2)O-G and r-Cu(2)O-G, respectively) have been fabricated by using simple solution-phase techniques. Among these photocatalysts, the r-Cu(2)O-G possesses the best photocatalytic performance of 98% removal efficiency of methyl orange (MO) with outstanding kinetics for 120 min of visible light irradiation. This enhancement is mainly due to the dangling “Cu” atoms in the highly active {110} facets, resulting in the increased adsorption of negatively charged MO. More importantly, the unique interfacial structures of Cu(2)O rhombic dodecahedra connected to graphene nanosheets can not only decrease the recombination of electron-hole pairs but also stabilize the crystal structure of Cu(2)O, as verified by a series of spectroscopic analyses (e.g., X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM)). The effective photocatalysts developed in this work could be applied to the efficient decolorization of negatively charged organic dyes by employing solar energy.
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spelling pubmed-60273502018-07-13 Facet-Dependent Cuprous Oxide Nanocrystals Decorated with Graphene as Durable Photocatalysts under Visible Light Liu, Shou-Heng Lu, Jun-Sheng Nanomaterials (Basel) Article Three morphologies (octahedral, hierarchical and rhombic dodecahedral) of crystal Cu(2)O with different facets ({111}, {111}/{110}, and {110}) incorporating graphene sheets (denoted as o-Cu(2)O-G, h-Cu(2)O-G and r-Cu(2)O-G, respectively) have been fabricated by using simple solution-phase techniques. Among these photocatalysts, the r-Cu(2)O-G possesses the best photocatalytic performance of 98% removal efficiency of methyl orange (MO) with outstanding kinetics for 120 min of visible light irradiation. This enhancement is mainly due to the dangling “Cu” atoms in the highly active {110} facets, resulting in the increased adsorption of negatively charged MO. More importantly, the unique interfacial structures of Cu(2)O rhombic dodecahedra connected to graphene nanosheets can not only decrease the recombination of electron-hole pairs but also stabilize the crystal structure of Cu(2)O, as verified by a series of spectroscopic analyses (e.g., X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM)). The effective photocatalysts developed in this work could be applied to the efficient decolorization of negatively charged organic dyes by employing solar energy. MDPI 2018-06-11 /pmc/articles/PMC6027350/ /pubmed/29891796 http://dx.doi.org/10.3390/nano8060423 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Liu, Shou-Heng
Lu, Jun-Sheng
Facet-Dependent Cuprous Oxide Nanocrystals Decorated with Graphene as Durable Photocatalysts under Visible Light
title Facet-Dependent Cuprous Oxide Nanocrystals Decorated with Graphene as Durable Photocatalysts under Visible Light
title_full Facet-Dependent Cuprous Oxide Nanocrystals Decorated with Graphene as Durable Photocatalysts under Visible Light
title_fullStr Facet-Dependent Cuprous Oxide Nanocrystals Decorated with Graphene as Durable Photocatalysts under Visible Light
title_full_unstemmed Facet-Dependent Cuprous Oxide Nanocrystals Decorated with Graphene as Durable Photocatalysts under Visible Light
title_short Facet-Dependent Cuprous Oxide Nanocrystals Decorated with Graphene as Durable Photocatalysts under Visible Light
title_sort facet-dependent cuprous oxide nanocrystals decorated with graphene as durable photocatalysts under visible light
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6027350/
https://www.ncbi.nlm.nih.gov/pubmed/29891796
http://dx.doi.org/10.3390/nano8060423
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