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Photocatalytic activity enhancement of PDI supermolecular via π-π action and energy level adjusting with graphene quantum dots

Title
Photocatalytic activity enhancement of PDI supermolecular via π-π action and energy level adjusting with graphene quantum dots
Authors
Yang, JunMiao, HongJing, JianfangZhu YongfaChoi, Wonyong
Date Issued
Feb-2021
Publisher
Elsevier BV
Abstract
Herein, perylene bisimide supramolecular (PDI) and graphene quantum dots (GQDs) were successfully layer-by-layer assembled via electrostatic interaction. The apparent rate constant of photocatalytic reaction for phenol degradation of GQDs/PDI-14 % (0.018 min−1) was 4.73 times as high as nano PDI under visible light. Besides, the rate of H2 production of GQDs/PDI-14 % (1.6 mmol g−1· h−1) was 1.88 times over that of pure PDI. GQDs is helpful for the electrons delocalization via π-π action with PDI. Moreover, the quantum confinement effect of GQDs promotes electron transfer from GQDs to PDI, which helps the conduction band of PDI shift to more negative position and further enhance the reduction ability of PDI. The work may afford some interesting ideas for designing efficient quantum dots-modified supramolecular organic photocatalysts.
URI
http://oasis.postech.ac.kr/handle/2014.oak/104986
ISSN
0926-3373
Article Type
Article
Citation
Applied Catalysis B: Environmental, vol. 281, page. 119547, 2021-02
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최원용CHOI, WONYONG
Div of Environmental Science & Enginrg
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