首页|Efficient and highly selective photocatalytic reduction of Cr(Ⅵ)by an active two-dimensional covalent organic framework
Efficient and highly selective photocatalytic reduction of Cr(Ⅵ)by an active two-dimensional covalent organic framework
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NETL
NSTL
万方数据
In this paper,a two-dimensional covalent organic framework material(named HDU-27)with thiazole structure and π-π conjugation has been successfully synthesized using the ligands tri acetaldehyde-based methoxyphenyl and benzo[1,2-d∶4,5-d]thiazole-2,6-diamine in an ammonia-formaldehyde condensation reaction and applied to the photocatalytic reduction study of chromium(Cr).The photocatalytic experiments showed that HDU-27 had an excellent photocatalytic reduction of Cr(Ⅵ)with a high Cr(Ⅵ)reduction efficiency of 99.5％at pH=2 for 60 min.In the presence of interfering ions,HDU-27 exhibited excellent selectivity for Cr(Ⅵ).Mechanistic experi-ments and electron spin resonance characterization identified e-and·O2-radicals as the main active species in Cr(Ⅵ)photocatalytic reduction.In addition,the photocatalytic rate of HDU-27 was significantly accelerated in the Cr(Ⅵ)/organic pollutant(RhB,MB,MO)mixed system due to the oxidation of the organic matter and the increase in the separation of photogenerated e--h+.The cycling experiments demonstrated the excellent reduction stability and recyclability of HDU-27 in the photocatalytic reduction of Cr(Ⅵ).HDU-27 is an excellent photocatalyst with potential application for removing organic pollutants and heavy metal ions from contaminated wastewater.
Yuxuan Bai、Yunzi Wang、Junyu Chen、Keda Zhu、Jianjun Wang
展开 >
MOE Key Laboratory of Resources and Environmental Systems Optimization,College of Environmental Science and Engineering,North China Electric Power University,Beijing,102206,PR China
NETL
NSTL
万方数据
