Hydrophilicity-Controlled Conjugated Microporous Polymers for Enhanced Visible-Light-Driven Photocatalytic H2 Evolution.
Hydrophilicity-Controlled Conjugated Microporous Polymers for Enhanced Visible-Light-Driven Photocatalytic H2 Evolution.
复制标题
用于增强可见光驱动光催化 H-2 演化的亲水性控制共轭微孔聚合物
DOI：
10.1002/marc.201800494
复制
发表时间：
2018
影响因子：
4.6
通讯作者：
Chen Hao
中科院分区：
文献类型：
--
作者：
Wang Xuepeng;Chen Bo;Dong Wenbo;Zhang Xiaohu;Li Zibiao;Xiang Yonggang;Chen Hao
为了充分利用网络共轭微孔聚合物的高比表面积，根据水相容性设计了四种线性或网络共轭聚合物L-PDBT、L-PDBT-O、N-PDBT和N-PDBT-O，结果表明，在可见光照射下，网络微孔聚合物N-PDBT-O的析氢速率（HER）最高，为366 μmol h-1（λ > 420 nm，最好报道的原始聚合物基光催化剂之一），其比相应的线性L-PDBT-O高三倍。水接触角测量表明，苯并噻吩砜基共轭聚合物显示出更好的水相容性和吸附性，更好的亲水表面和更高的表面积的协同效应，N-PDBT-O可能最终导致更多的暴露活性位点相比，线性L-PDBT-O在H2释放悬浮体系。亲水性控制策略可应用于其他网络缀合微孔聚合物光催化剂的设计，以尝试提高活性。
To take advantage of high surface area of network conjugated microporous polymers, four linear or network conjugated polymers L‐PDBT, L‐PDBT‐O, N‐PDBT, and N‐PDBT‐O are designed in terms of water‐compatibility, and it turned out that microporous network N‐PDBT‐O exhibited the highest hydrogen evolution rate (HER) at 366 µmol h−1under visible light irradiation (λ > 420 nm, one of best reported pristine polymer‐based photocatalysts), which is three times higher than the corresponding linear L‐PDBT‐O. Water contact angle measurements revealed that benzothiophene‐sulfone‐based conjugated polymers display better water compatibility and adsorption, and the synergic effect of better hydrophilic surface and higher surface area of N‐PDBT‐O might eventually lead to more exposed active sites in comparison to linear L‐PDBT‐O in the H2evolution suspension system. The hydrophilicity‐controlled strategy could be applied to design of other network conjugated microporous polymer photocatalysts in an attempt to improve the activity.