期刊
CATALYSIS SCIENCE & TECHNOLOGY
卷 11, 期 7, 页码 2379-2385出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0cy02355h
关键词
-
资金
- National Natural Science Foundation of China [21703170]
- Key Research and Development Program of Shaanxi [2020GY-244]
- Innovation Fund Project of College and Universities of Gansu Province [2020A-097]
- Young Academic Talents Program of Northwest University
- Top-rated Discipline construction scheme of Shaanxi higher education
In this study, iron doping was found to enhance the photo(electro)catalytic activity of PhC2Cu, leading to improved photocurrent density and increased efficiency in degrading organic pollutants. The modulation of energy band structure and inhibition of LMCT were key factors contributing to the enhanced separation of electron-hole pairs.
In this work, iron doping was proposed to improve the photo(electro)catalytic activity of PhC2Cu, an air stable metal-organic coordination polymeric photocatalyst. After displacement of partial Cu atoms by Fe, the energy band structure of PhC2Cu was successively modulated, featuring a narrowed band gap and down-shift in the valence band towards a more positive potential. More interestingly, the luminescence chromism upon iron doping is indicative of inhibited ligand-to-metal charge transfer (LMCT) that is relevant to the recombination of photocarriers. When the mole ratio of Fe/Cu reached 2%, the photocurrent density achieved its maximum, which was 4 times higher than that of the PhC2Cu photocathode, consistent with an enhanced separation of electron-hole pairs. Furthermore, the extremely negative conduction band potential of PhC2Cu enabled efficient O-2 activation, generating a series of reactive oxygen species (ROS) for the degradation of organic pollutants. The rate of methyl orange (MO) and 2,4-dichlorophenol (2,4-DCP) degradation over 2% Fe-PhC2Cu increased by 2 and 1.6 times. This study provides a promising strategy for improving the activity of metal-organic photocatalysts.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据