光催化
共轭微孔聚合物
聚合物
材料科学
微型多孔材料
分离(统计)
化学工程
金属有机骨架
纳米技术
膜
化学
计算机科学
工程类
有机化学
催化作用
复合材料
机器学习
作者
Guoqiang Zhang,Wei Ou,Jun Wang,Yangsen Xu,Dong Xu,Tao Sun,Shengxiong Xiao,Mengran Wang,Hexing Li,Wei Chen,Chenliang Su
标识
DOI:10.1016/j.apcatb.2018.12.007
摘要
Abstract 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.
科研通智能强力驱动
Strongly Powered by AbleSci AI