光催化
材料科学
杂原子
载流子
兴奋剂
石墨氮化碳
纳米结构
可见光谱
带隙
纳米技术
催化作用
析氧
合理设计
光化学
光催化分解水
纳米管
分解水
化学工程
碳纳米管
氢
化学
光电子学
电化学
有机化学
工程类
戒指(化学)
电极
物理化学
作者
Yizeng Zhang,Zhiwu Chen,Jinliang Li,Zhenya Lu,Xin Wang
标识
DOI:10.1016/j.jechem.2020.05.043
摘要
Currently, photocatalytic water splitting is regarded as promising technology in renewable energy generation. However, the conversion efficiency suffers great restriction due to the rapid recombination of charge carriers. Rational designed the structure and doping elements become important alternative routes to improve the performance of photocatalyst. In this work, we rational designed oxygen-doped graphitic carbon nitride (OCN) nanotubes derived from supermolecular intermediates for photocatalytic water splitting. The as prepared OCN nanotubes exhibit an outstanding hydrogen evolution rate of 73.84 μmol h−1, outperforming the most of reported one dimensional (1D) g-C3N4 previously. Due to the rational oxygen doping, the band structure of g-C3N4 is meliorated, which can narrow the band gap and reduce the recombination rate of photogenerated carriers. Furthermore, the hollow nanotube structure of OCN also provide multiple diffuse reflection during photocatalytic reaction, which can significantly promote the utilization capacity of visible light and enhance the photocatalytic water splitting performance. It is believed that our work not only rationally controls the nanostructure, but also introduces useful heteroatom into the matrix of photocatalyst, which provides an effective way to design high-efficiency g-C3N4 photocatalyst.
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