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Visible-light-driven hydrogen evolution using nitrogen-doped carbon quantum dot-implanted polymer dots as metal-free photocatalysts

Elsayed, Mohamed Hammad ; Jayakumar, Jayachandran ; Abdellah, Mohamed LU ; Mansoure, Tharwat Hassan ; Zheng, Kaibo LU ; Elewa, Ahmed M. ; Chang, Chih Li ; Ting, Li Yu ; Lin, Wei Cheng and Yu, Hsiao hua , et al. (2021) In Applied Catalysis B: Environmental 283.
Abstract

Given the photocatalytic properties of semiconducting polymers and carbon quantum dots (CQDs), we report a new structure for a metal-free photocatalytic system with a promising efficiency for hydrogen production through the combination of an organic semiconducting polymer (PFTBTA) and N-doped carbon quantum dots (NCQDs) covered by PS-PEGCOOH to produce heterostructured photocatalysts in the form of polymer dots (Pdots). This design could provide strong interactions between the two materials owing to the space confinement effect in nanometer-sized Pdots. Small particle size NCQDs are easy to insert inside the Pdot, which leads to an increase in the stability of the Pdot structure and enhances the hydrogen evolution rate by approximately... (More)

Given the photocatalytic properties of semiconducting polymers and carbon quantum dots (CQDs), we report a new structure for a metal-free photocatalytic system with a promising efficiency for hydrogen production through the combination of an organic semiconducting polymer (PFTBTA) and N-doped carbon quantum dots (NCQDs) covered by PS-PEGCOOH to produce heterostructured photocatalysts in the form of polymer dots (Pdots). This design could provide strong interactions between the two materials owing to the space confinement effect in nanometer-sized Pdots. Small particle size NCQDs are easy to insert inside the Pdot, which leads to an increase in the stability of the Pdot structure and enhances the hydrogen evolution rate by approximately 5-fold over that of pure PFTBTA Pdots. The photophysics and the mechanism behind the catalytic activity of our design are investigated by transient absorption measurement, demonstrating the role of NCQDs to enhance the charge separation and the photocatalytic efficiency of the PFTBTA Pdot.

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publishing date
type
Contribution to journal
publication status
published
subject
keywords
Carbon quantum dot, Hydrogen evolution, Photocatalysts, Polymer dots, Visible-light
in
Applied Catalysis B: Environmental
volume
283
article number
119659
publisher
Elsevier
external identifiers
  • scopus:85096166504
ISSN
0926-3373
DOI
10.1016/j.apcatb.2020.119659
language
English
LU publication?
yes
id
f5fd3e0a-fd2f-4718-8581-65e30055f1fe
date added to LUP
2020-11-23 15:09:40
date last changed
2023-11-20 15:25:25
@article{f5fd3e0a-fd2f-4718-8581-65e30055f1fe,
  abstract     = {{<p>Given the photocatalytic properties of semiconducting polymers and carbon quantum dots (CQDs), we report a new structure for a metal-free photocatalytic system with a promising efficiency for hydrogen production through the combination of an organic semiconducting polymer (PFTBTA) and N-doped carbon quantum dots (NCQDs) covered by PS-PEGCOOH to produce heterostructured photocatalysts in the form of polymer dots (Pdots). This design could provide strong interactions between the two materials owing to the space confinement effect in nanometer-sized Pdots. Small particle size NCQDs are easy to insert inside the Pdot, which leads to an increase in the stability of the Pdot structure and enhances the hydrogen evolution rate by approximately 5-fold over that of pure PFTBTA Pdots. The photophysics and the mechanism behind the catalytic activity of our design are investigated by transient absorption measurement, demonstrating the role of NCQDs to enhance the charge separation and the photocatalytic efficiency of the PFTBTA Pdot.</p>}},
  author       = {{Elsayed, Mohamed Hammad and Jayakumar, Jayachandran and Abdellah, Mohamed and Mansoure, Tharwat Hassan and Zheng, Kaibo and Elewa, Ahmed M. and Chang, Chih Li and Ting, Li Yu and Lin, Wei Cheng and Yu, Hsiao hua and Wang, Wen Hsin and Chung, Chih Chia and Chou, Ho Hsiu}},
  issn         = {{0926-3373}},
  keywords     = {{Carbon quantum dot; Hydrogen evolution; Photocatalysts; Polymer dots; Visible-light}},
  language     = {{eng}},
  publisher    = {{Elsevier}},
  series       = {{Applied Catalysis B: Environmental}},
  title        = {{Visible-light-driven hydrogen evolution using nitrogen-doped carbon quantum dot-implanted polymer dots as metal-free photocatalysts}},
  url          = {{http://dx.doi.org/10.1016/j.apcatb.2020.119659}},
  doi          = {{10.1016/j.apcatb.2020.119659}},
  volume       = {{283}},
  year         = {{2021}},
}