Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.apcatb.2018.12.007
Title: Stable, carrier separation tailorable conjugated microporous polymers as a platform for highly efficient photocatalytic H-2 evolution
Authors: Guoqiang Zhang
Wei Ou
Jun Wang
Yangsen Xu
Dong Xu
Tao Sun 
Shuning Xiao
Mengran Wang
Hexing Li
Wei Chen 
Chenliang Su 
Keywords: Science & Technology
Physical Sciences
Technology
Chemistry, Physical
Engineering, Environmental
Engineering, Chemical
Chemistry
Engineering
Conjugated microporous polymers
Donor-acceptor units
Charge separation
Light absorption
Photocatalytic H-2 production
COVALENT ORGANIC FRAMEWORK
VISIBLE-LIGHT
HYDROGEN-PRODUCTION
GENERATION
DESIGN
WATER
Issue Date: 15-May-2019
Publisher: ELSEVIER
Citation: Guoqiang Zhang, Wei Ou, Jun Wang, Yangsen Xu, Dong Xu, Tao Sun, Shuning Xiao, Mengran Wang, Hexing Li, Wei Chen, Chenliang Su (2019-05-15). Stable, carrier separation tailorable conjugated microporous polymers as a platform for highly efficient photocatalytic H-2 evolution. APPLIED CATALYSIS B-ENVIRONMENTAL 245 : 114-121. ScholarBank@NUS Repository. https://doi.org/10.1016/j.apcatb.2018.12.007
Abstract: © 2018 Elsevier B.V. The molecular design of highly photo-functional polymers with high charge separation efficiency and wide spectral absorption are long term quest for photocatalysis. Herein, we design and develop a series of nitrogen-containing conjugated microporous polymers (N-CMPs) with tailored donor-acceptor units for enhancing charge separation and light harvesting for visible light photocatalytic H2 production. By alternating the substitution position (o-, m-, or p-) and the number of electron donor (carbazole, diphenylamine) and acceptor (cyano) units on the 3D-core structure, a series of N-CMPs with adjustable donor-acceptor (D-A) charge separation efficiencies and tuneable band gaps in the range of 1.64–2.29 eV were obtained, enabling the precise control of the photocatalytic activity at the molecular level. The optimized N-CMP (4-CzPN) exhibits a higher visible light H2 production rate at 2103.2 μmol/h·g and the apparent quantum yield (AQY) at 420 nm reaches 6.4%. Furthermore, the 4-CzPN photocatalyst maintains excellent durability and recycling performance under 25 h continued light irradiation. The outstanding photocatalytic performance of the optimized N-CMPs with D-A structure is attributed to the enhanced polarity and conjugated degree of their core structure, which promotes charge separation and light absorption.
Source Title: APPLIED CATALYSIS B-ENVIRONMENTAL
URI: https://scholarbank.nus.edu.sg/handle/10635/169205
ISSN: 0926-3373
DOI: 10.1016/j.apcatb.2018.12.007
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