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β-酮烯胺基共价三嗪框架光驱动Cr(VI)还原

发表时间:2022-12-29  浏览量:549  下载量:69
全部作者: 李婉荣,江国防
作者单位: 湖南大学化学化工学院
摘 要: 本文合成了两种不同构效关系的三嗪基共价有机框架TpTt和TriCF,采用X-射线衍射(X-ray diffraction,XRD)、傅里叶变换红外光谱(Fourier transform infrared spectroscopy,FT-IR)、紫外-可见漫反射光谱(ultraviolet-visible diffuse reflection spectroscopy,UV-vis DRS)、X射线光电子能谱(X-ray photoelectron spectroscopy,XPS)、比表面积(brunauer-emmett-teller,BET)、场发射扫描电子显微镜(scanning electron microscope,SEM)、电化学阻抗(electrochemical impedance spectroscopy,EIS)等一系列表征手段研究两种不同材料的内部构造及光电性质,通过光催化还原Cr(VI)来评估两种材料的性能。结果表明,5 mg TpTt在22 min内对Cr(VI)的光催化还原率达到90%,而TriCF对于Cr(VI)的光催化还原率很低。因此,TpTt的光催化活性远高于TriCF,这归因于TpTt的β-酮烯胺及三嗪结构。
关 键 词: 有机化学;共价有机框架;光催化;Cr(VI)还原
Title: Photo-driven reduction of Cr(VI) by β-ketoenamine covalent triazine framework
Author: LI Wanrong, JIANG Guofang
Organization: College of Chemistry and Chemical Engineering, Hunan University
Abstract: In this paper, two kinds of TpTt and TriCF under triazine covalent organic frameworks with different structure-activity relationships were synthesized. Internal structure and photoelectric properties of the two different materials were discussed via X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), ultraviolet-visible diffuse reflection spectroscopy (UV-vis DRS), X-ray photoelectron spectroscopy (XPS), brunauer-emmett-teller (BET), scanning electron microscope (SEM) and electrochemical impedance spectroscopy (EIS), and their properties were evaluated by photocatalytic reduction of Cr(VI). The results show that the photocatalytic reduction rate of Cr(VI) by 5 mg TpTt reached 90% within 22 min, while that the photocatalytic reduction rate of Cr(VI) of TriCF under same conditions was very low. Therefore, the photocatalytic activity of TpTt is much higher than that of TriCF, which is due to the β-ketoenamine and triazine structure of TpTt.
Key words: organic chemistry; covalent organic frameworks; photocatalytic; Cr(VI) reduction
发表期数: 2022年12月第4期
引用格式: 李婉荣,江国防. β-酮烯胺基共价三嗪框架光驱动Cr(VI)还原[J]. 中国科技论文在线精品论文,2022,15(4):523-530.
 
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