Activation of 2D cobalt hydroxide with 0D cobalt oxide decoration for microplastics degradation and hydrogen evolution
(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.
(Less)
- author
- Greco, Rossella ; Baxauli-Marin, Lucía ; Temerov, Filipp ; Daboczi, Matyas ; Eslava, Salvador ; Niu, Yuran LU ; Zakharov, Alexei LU ; Zhang, Meng ; Li, Taohai and Cao, Wei
- organization
- publishing date
- 2023
- 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}}, }