光催化
材料科学
结晶度
三嗪
制氢
表面改性
带隙
聚合物
共价键
聚合
化学工程
光化学
纳米技术
氢
高分子化学
催化作用
有机化学
化学
光电子学
复合材料
工程类
作者
Chengxiao Zhao,Zhaolin Li,Xinzhao Wu,Hengwei Su,Fu‐Quan Bai,Xia Ran,Liuqing Yang,Weiwei Fang,Xiaofei Yang
出处
期刊:Small
[Wiley]
日期:2024-04-21
标识
DOI:10.1002/smll.202400541
摘要
Abstract The high crystalline covalent triazine framework‐1 (CTF‐1), composed of alternating triazine and phenylene, has emerged as an efficient photocatalyst for solar‐driven hydrogen evolution reaction (HER). However, it is of great challenge to further improve photocatalytic HER performance via increasing crystallinity due to its near‐perfect crystallization. Herein, an alternative strategy of scaffold functionalization is employed to optimize the energy band structure of crystalline CTF‐1 for boosting hydrogen‐evolving activity. Guided by the computational predictions, versatile CTF‐based polymer photocatalysts are prepared with different functional groups (OH, NH 2 , COOH) using binary polymerization for practical hydrogen production. Experiment evidence verifies that the introduction of a limited number of electron‐donating groups is sufficient to maintain high crystallinity in CTF, modulate the band structure, broaden visible light absorption, and consequently enhance its photophysical properties. Notably, the functionalization with OH exhibits the most positive effect on CTF‐1, delivering a photocatalytic activity with a hydrogen‐producing rate exceeding 100 µmol h −1 .
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