光催化
双重功能
电场
对偶(语法数字)
超分子化学
材料科学
氧气
化学工程
析氧
氢
纳米技术
光化学
化学
催化作用
电极
有机化学
电化学
计算机科学
物理化学
物理
晶体结构
艺术
计算机图形学(图像)
文学类
轮廓
量子力学
工程类
作者
Shicheng Xu,Siqi Chen,Yuxin Li,Qiong Gao,Xin Luo,Min Li,Long‐Fei Ren,Peng Wang,Liping Liu,Jun Wang,Xianjie Chen,Qian Chen,Yongfa Zhu
出处
期刊:Small
[Wiley]
日期:2024-03-18
标识
DOI:10.1002/smll.202400344
摘要
Abstract Organic supramolecular photocatalysts have garnered widespread attention due to their adjustable structure and exceptional photocatalytic activity. Herein, a novel bis‐dicarboxyphenyl‐substituent naphthalenediimide self‐assembly supramolecular photocatalyst (SA‐NDI‐BCOOH) with efficient dual‐functional photocatalytic performance is successfully constructed. The large molecular dipole moment and short‐range ordered stacking structure of SA‐NDI‐BCOOH synergistically create a giant internal electric field (IEF), resulting in a remarkable 6.7‐fold increase in its charge separation efficiency. Additionally, the tetracarboxylic structure of SA‐NDI‐BCOOH greatly enhances its hydrophilicity. Thus, SA‐NDI‐BCOOH demonstrates efficient dual‐functional activity for photocatalytic hydrogen and oxygen evolution, with rates of 372.8 and 3.8 µmol h −1 , respectively. Meanwhile, a notable apparent quantum efficiency of 10.86% at 400 nm for hydrogen evolution is achieved, prominently surpassing many reported supramolecular photocatalysts. More importantly, with the help of dual co‐catalysts, it exhibits photocatalytic overall water splitting activity with H 2 and O 2 evolution rates of 3.2 and 1.6 µmol h −1 . Briefly, this work sheds light on enhancing the IEF by controlling the molecular polarity and stacking structure to dramatically improve the photocatalytic performance of supramolecular materials.
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