共价键连构建PANI-CTF-1复合材料实现高效电荷转移和光催化产氢

Covalent Bonding Strategy to Construct PANI-CTF-1 Composite for Efficient Charge Transfer and Photocatalytic Hydrogen Production

开发高效稳定的产氢光催化剂具有重要意义,但存在巨大挑战。在此,本研究提出了一种基于有机分子间共价键连的催化剂修饰策略,并用于设计合成聚苯胺嫁接的CTF-1复合光催化剂(PANI-CTF-1)。光谱表征表明,PANI和CTF-1之间通过—N—C=N—共价键相连,该共价键不仅桥连两组分,而且能作为它们之间的电荷传输通道,提高光生电荷的传输速率和注入效率。光催化结果显示,与范德华力连接的PANI/CTF-1传统异质结相比,PANI-CTF-1表现出更优异的光催化产氢活性和更高的稳定性。

Developing highly efficient and stable photocatalyst for hydrogen evolution is of great significance,yet challenging.Herein,a strategy via chemically covalent combination between organic molecules is proposed for photocatalyst modification.And polyaniline-grafted CTF-1 composites(PANI-CTF-1)are prepared via such a chemically covalent combination strategy.Spectral characterizations indicate that PANI and CTF-1 are connected through—N—C=N—covalent bonds,which not only bridge the two components but also serve as a charge transfer channel between them,thus improving the transfer rate and injection efficiency of photogenerated charges.The photocatalytic experiments show that the as-prepared PANI-CTF-1 exhibits superior photocatalytic hydrogen evolution rate and higher stability as compared with the traditional PANI/CTF-1 heterojunction connected by van der Waals force.