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Dual Functions of O-Atoms in the g-C3N4/BO0.2N0.8Interface : Oriented Charge Flow In-Plane and Separation within the Interface to Collectively Promote Photocatalytic Molecular Oxygen Activation

Cao, Yuehan ; Zhang, Ruiyang ; Zheng, Qian ; Cui, Wen ; Liu, Yang ; Zheng, Kaibo LU ; Dong, Fan and Zhou, Ying (2020) In ACS Applied Materials and Interfaces 12(30). p.34432-34440
Abstract

The photocatalytic performance of two-dimensional materials is largely limited by the fast recombination of photogenerated charges. Herein, we design and fabricate a novel g-C3N4/BO0.2N0.8 van der Waals heterostructure to realize oriented charge flow in-plane and separation within the interface. On one hand, a B-C bond forms within the g-C3N4/BO0.2N0.8 interface after the introduction of O atoms. The B-C bond as the mediator bridges g-C3N4 and BO0.2N0.8 sides to enhance the effective separation of photogenerated charges. On the other hand, the existence of O atoms promotes the formation of a B-O-O-B intermediate to realize that molecular oxygen can directionally obtain electrons from the surface to generate O2-. As a result, BO0.2N0.8... (More)

The photocatalytic performance of two-dimensional materials is largely limited by the fast recombination of photogenerated charges. Herein, we design and fabricate a novel g-C3N4/BO0.2N0.8 van der Waals heterostructure to realize oriented charge flow in-plane and separation within the interface. On one hand, a B-C bond forms within the g-C3N4/BO0.2N0.8 interface after the introduction of O atoms. The B-C bond as the mediator bridges g-C3N4 and BO0.2N0.8 sides to enhance the effective separation of photogenerated charges. On the other hand, the existence of O atoms promotes the formation of a B-O-O-B intermediate to realize that molecular oxygen can directionally obtain electrons from the surface to generate O2-. As a result, BO0.2N0.8 instead of g-C3N4 is considered to be the main reaction side, and the energy barrier of NO3- generation is significantly decreased. The NO removal performance of g-C3N4/BO0.2N0.8 is enhanced and the NO2 generation is effectively controlled compared with that of g-C3N and g-C3N4/BN. This work could provide an effective and facile strategy to tune oriented charge transfer.

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author
; ; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
effective separation of photogenerated charges, g-CN/BONinterface, molecular oxygen activation, oriented charge transfer, oxygen modification
in
ACS Applied Materials and Interfaces
volume
12
issue
30
pages
9 pages
publisher
The American Chemical Society (ACS)
external identifiers
  • scopus:85089707614
  • pmid:32614161
ISSN
1944-8244
DOI
10.1021/acsami.0c09216
language
English
LU publication?
yes
id
7f7e375c-dc7b-43dc-a153-fbb3f826dccd
date added to LUP
2021-01-12 10:29:35
date last changed
2024-04-18 00:01:38
@article{7f7e375c-dc7b-43dc-a153-fbb3f826dccd,
  abstract     = {{<p>The photocatalytic performance of two-dimensional materials is largely limited by the fast recombination of photogenerated charges. Herein, we design and fabricate a novel g-C3N4/BO0.2N0.8 van der Waals heterostructure to realize oriented charge flow in-plane and separation within the interface. On one hand, a B-C bond forms within the g-C3N4/BO0.2N0.8 interface after the introduction of O atoms. The B-C bond as the mediator bridges g-C3N4 and BO0.2N0.8 sides to enhance the effective separation of photogenerated charges. On the other hand, the existence of O atoms promotes the formation of a B-O-O-B intermediate to realize that molecular oxygen can directionally obtain electrons from the surface to generate O2-. As a result, BO0.2N0.8 instead of g-C3N4 is considered to be the main reaction side, and the energy barrier of NO3- generation is significantly decreased. The NO removal performance of g-C3N4/BO0.2N0.8 is enhanced and the NO2 generation is effectively controlled compared with that of g-C3N and g-C3N4/BN. This work could provide an effective and facile strategy to tune oriented charge transfer. </p>}},
  author       = {{Cao, Yuehan and Zhang, Ruiyang and Zheng, Qian and Cui, Wen and Liu, Yang and Zheng, Kaibo and Dong, Fan and Zhou, Ying}},
  issn         = {{1944-8244}},
  keywords     = {{effective separation of photogenerated charges; g-CN/BONinterface; molecular oxygen activation; oriented charge transfer; oxygen modification}},
  language     = {{eng}},
  month        = {{07}},
  number       = {{30}},
  pages        = {{34432--34440}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{ACS Applied Materials and Interfaces}},
  title        = {{Dual Functions of O-Atoms in the g-C<sub>3</sub>N<sub>4</sub>/BO<sub>0.2</sub>N<sub>0.8</sub>Interface : Oriented Charge Flow In-Plane and Separation within the Interface to Collectively Promote Photocatalytic Molecular Oxygen Activation}},
  url          = {{http://dx.doi.org/10.1021/acsami.0c09216}},
  doi          = {{10.1021/acsami.0c09216}},
  volume       = {{12}},
  year         = {{2020}},
}