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 |
Appears in Collections: | Staff Publications Elements |
Show full item record
Files in This Item:
File | Description | Size | Format | Access Settings | Version | |
---|---|---|---|---|---|---|
Stable, carrier separation tailorable conjugated microporous polymers as a platform for highly efficient photocatalytic H-2 evolution.pdf | 1.95 MB | Adobe PDF | OPEN | Post-print | View/Download |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.