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Activation of 2D cobalt hydroxide with 0D cobalt oxide decoration for microplastics degradation and hydrogen evolution

Greco, Rossella ; Baxauli-Marin, Lucía ; Temerov, Filipp ; Daboczi, Matyas ; Eslava, Salvador ; Niu, Yuran LU ; Zakharov, Alexei LU ; Zhang, Meng ; Li, Taohai and Cao, Wei (2023) In Chemical Engineering Journal 471.
Abstract

The 2D semiconductors are important players in environmental and energy fields due to their unique catalytic and physical properties defined by their dimensionality. Versatile functionalities on one 2D matrix will enlarge its application scopes but require dedicated engineering paths. In this work, we present a cross-dimensional strategy by decorating 0D Co3O4 onto 2D Co(OH)2 to form a multifunctional photocatalyst. The one-pot hydrothermally synthesized Co3O4@Co(OH)2 composite is capable of degrading polystyrene microplastics with an efficiency of 40% under 0.495 W white LED illumination. In a separated experiment, H2 evolution reaction from water splitting... (More)

The 2D semiconductors are important players in environmental and energy fields due to their unique catalytic and physical properties defined by their dimensionality. Versatile functionalities on one 2D matrix will enlarge its application scopes but require dedicated engineering paths. In this work, we present a cross-dimensional strategy by decorating 0D Co3O4 onto 2D Co(OH)2 to form a multifunctional photocatalyst. The one-pot hydrothermally synthesized Co3O4@Co(OH)2 composite is capable of degrading polystyrene microplastics with an efficiency of 40% under 0.495 W white LED illumination. In a separated experiment, H2 evolution reaction from water splitting was evaluated in absence of sacrificial agents leading to 43 μmol g−1 and to an apparent quantum efficiency of 3.48% at 420 nm. The study of the energy band diagrams by UV–Visible and ambient photoemission spectroscopy and the analysis of the radicals involved in the reaction of photocatalytic degradation allow to unveil the mechanisms for both the processes herein studied. Finally, we could confirm that the heterostructure benefits the redox potentials of 2D and 0D counterparts and facile electron transfers when crossing two different dimensions. These results provide guidelines and inspiration for cross-dimensional activations of low-dimensional materials for versatile functionalities.

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author
; ; ; ; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Cobalt hydroxide, Cobalt oxide, Hydrogen evolution reaction, Microplastic degradation, Photocatalysis
in
Chemical Engineering Journal
volume
471
article number
144569
publisher
Elsevier
external identifiers
  • scopus:85165259605
ISSN
1385-8947
DOI
10.1016/j.cej.2023.144569
language
English
LU publication?
yes
id
c0d78ab0-e4c6-48d2-955d-0137435bf825
date added to LUP
2023-09-05 09:38:43
date last changed
2023-09-05 09:38:43
@article{c0d78ab0-e4c6-48d2-955d-0137435bf825,
  abstract     = {{<p>The 2D semiconductors are important players in environmental and energy fields due to their unique catalytic and physical properties defined by their dimensionality. Versatile functionalities on one 2D matrix will enlarge its application scopes but require dedicated engineering paths. In this work, we present a cross-dimensional strategy by decorating 0D Co<sub>3</sub>O<sub>4</sub> onto 2D Co(OH)<sub>2</sub> to form a multifunctional photocatalyst. The one-pot hydrothermally synthesized Co<sub>3</sub>O<sub>4</sub>@Co(OH)<sub>2</sub> composite is capable of degrading polystyrene microplastics with an efficiency of 40% under 0.495 W white LED illumination. In a separated experiment, H<sub>2</sub> evolution reaction from water splitting was evaluated in absence of sacrificial agents leading to 43 μmol g<sup>−1</sup> and to an apparent quantum efficiency of 3.48% at 420 nm. The study of the energy band diagrams by UV–Visible and ambient photoemission spectroscopy and the analysis of the radicals involved in the reaction of photocatalytic degradation allow to unveil the mechanisms for both the processes herein studied. Finally, we could confirm that the heterostructure benefits the redox potentials of 2D and 0D counterparts and facile electron transfers when crossing two different dimensions. These results provide guidelines and inspiration for cross-dimensional activations of low-dimensional materials for versatile functionalities.</p>}},
  author       = {{Greco, Rossella and Baxauli-Marin, Lucía and Temerov, Filipp and Daboczi, Matyas and Eslava, Salvador and Niu, Yuran and Zakharov, Alexei and Zhang, Meng and Li, Taohai and Cao, Wei}},
  issn         = {{1385-8947}},
  keywords     = {{Cobalt hydroxide; Cobalt oxide; Hydrogen evolution reaction; Microplastic degradation; Photocatalysis}},
  language     = {{eng}},
  publisher    = {{Elsevier}},
  series       = {{Chemical Engineering Journal}},
  title        = {{Activation of 2D cobalt hydroxide with 0D cobalt oxide decoration for microplastics degradation and hydrogen evolution}},
  url          = {{http://dx.doi.org/10.1016/j.cej.2023.144569}},
  doi          = {{10.1016/j.cej.2023.144569}},
  volume       = {{471}},
  year         = {{2023}},
}