Journal
CATALYSIS SCIENCE & TECHNOLOGY
Volume 8, Issue 19, Pages 5024-5033Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8cy01379a
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Funding
- NNSFC [21377172, 21477166, 21527813, 21677182, 21737006, 21337003]
- NSF of Guangdong Province [S2013030013474, 2018A030313441]
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Two types of conjugated microporous polymer photocatalysts inherently possessing a high surface area (up to 1265 m(2) g(-1)) have been synthesized via Sonogashira-Hagihara cross-coupling polycondensation and applied for the removal of different organic contaminants (rhodamine B, phenol and tetracycline) via adsorption-photocatalysis synergy. The study on the photocatalytic performance and mechanism demonstrated that the specific surface areas and the backbone structures of the polymers had a great influence on the photocatalytic performances. A higher specific surface area and an increased adsorption efficiency for pollutants contributed to the enhanced photocatalytic activity. The optical and electrochemical characterization studies revealed that compared with its counterpart with a network structure, the linear polymer (based on 1,4-diethynylbenzene) showed a narrower band gap and a higher photogenerated charge separation efficiency due to its better extended conjugated system, which boosted its photocatalytic activity. The above features made the polymers exhibit superior adsorption-photocatalytic activity compared with the reported photocatalysts. This work highlights the potential of developing porous organic semiconductors as highly efficient photocatalysts for environmental remediation.
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