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Bottom-Up Preparation of Fully sp 2 -Bonded Porous Carbons with High Photoactivities

Research output: Contribution to journalArticle

  • Wenyong Ming
  • Shuai Bi
  • Yinghang Zhang
  • Kaijin Yu
  • Chenbao Lu
  • Xiaobin Fu
  • Feng Qiu
  • Ping Liu
  • Yuezeng Su
  • Fan Zhang
Original languageEnglish
Article number1808423
JournalAdvanced Functional Materials
Volume29
Issue number14
Early online date20 Jan 2019
DOIs
DateAccepted/In press - 31 Dec 2018
DateE-pub ahead of print - 20 Jan 2019
DatePublished (current) - 4 Apr 2019

Abstract

Porous carbons, possessing exceptional stability, high surface area, and electric conductivity, are broadly used as superior adsorbent, supporter, or electrode material for environmental protection, industrial catalysis, and energy storage and conversion. The construction of such kinds of materials with designable structures and properties will extremely extend their potential applications, but remains a huge synthetic challenge. Herein, a bottom-up approach is presented to synthesize one type of fully sp 2 carbon–bonded frameworks by transition metal–catalyzed cross-coupling of different polyphenylenes with electron-withdrawing 9,9′-bifluorenylidene (9,9′-BF) through its 2,7-position. The resulting porous polymeric carbons exhibit substantial semiconducting properties, such as strong light-harvesting capabilities in the visible light region, likely due to their π-extended backbones with donor–acceptor characters. Their electronic and porous structures can be finely tuned via the polyphenylene spacers. The intriguing properties allow these porous carbons to efficiently catalyze dye degradation under visible light or even natural sunlight with high reusability. Meanwhile, associated with their intrinsic structures, these porous carbons also exhibit highly selective degradation activities toward different dyes. In particular, the photodegradation mechanism involving oxygen and electron is elucidated for the first time for such kinds of materials, related to the presence of specific 9,9′-BF units in their π-conjugated skeletons.

    Research areas

  • dye degradation, porous carbon, semiconducting properties, sp -carbon framework

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