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卡利克斯[4]arene-Derived 2D共价有机框架与电子捐赠-接受结构:一个可见光驱动的光催化剂

Jialin Xu¹, Wei Liu², Lisha Jiang¹

¹School of Environmental and Material Engineering, Yantai University, No.30 Qiangquan Road, Yantai, Shandong, 264005, China.

Small (Weinheim an der Bergstrasse, Germany)

|August 26, 2023

概括

这项研究引入了一种新型的素衍生的共价有机框架 (COF),用于高效的光催化. 合成的COF-C4A-BTD显示出高可见光活性,用于去除有机污染物.

科学领域:

材料科学材料科学材料科学
化学化学化学
环境科学环境科学

背景情况:

由于其富含电子的特性,卡利沙是光催化共价有机框架 (COF) 的有效构建块.
合成和确认基于卡利沙林的COF的结构,由于灵活性和形状的多样性,提出了挑战.

研究的目的:

为了合成一种新的2DCOF,使用[4]衍生物作为电子捐赠物和乙衍生物作为接受物.
研究合成的COF-C4A-BTD的结构,电子和光催化性能.

主要方法:

合成COF-C4A-BTD使用5,11,17,23-tetrakis(p-formyl) -25,26,27,28-tetrahydroxycalix[4]arene (CHO-C4A) 和4,7-bis(4-aminophenyl) -2,1,3-benzothiadiazole (BTD) 的合成方法. 这两种方法中的一个是:
使用粉末X射线衍射和理论模拟进行结构性表征.
通过可见光下有机污染物的降解来评估光催化活性.
使用密度函数理论,光电流测试和电化学阻抗光谱学分析电子性质.

主要成果:

COF-C4A-BTD具有高结晶性,具有不穿透的波浪式2D层结构.
由于捐赠体-接受体结构,证实了分子内电荷转移,导致了优异的可见光光催化活性.
实现了对双A (66%),罗达胺B (85%) 和甲蓝 (99%) 的高去除率.
狭窄带间隙 (1.99 eV) 和合适的导电带能量 (-0.37 V与NHE) 促进光催化.

结论:

合成的卡利沙林衍生的COF (COF-C4A-BTD) 显示出有希望的可见光驱动光催化性能.
该材料的结构和电子特性非常适合有效降解有机污染物.
这项工作突出了基于卡力沙林的COF在环境修复应用中的潜力.

关键词:

卡利克萨雷内克萨雷内克萨雷尼共价有机框架是共价有机框架.光催化作用的光催化作用

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