调节共价有机框架的表面化学,用于增强阴阳色素染料的去除和识别
Xiaoli Zhou1, Wenjuan Lei1, Xiaohuan Qin1
1State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), Collaborative Innovation Center for Guangxi Ethnic Medicine, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin, 541004, P. R. China.
Analytical and bioanalytical chemistry
|December 8, 2024
概括
研究人员开发了用于清除水污染物的新型共价有机框架 (COF). 这些先进的材料有效地吸附和识别阴离子染料,为水质监测提供了灵敏可靠的方法.
科学领域:
- 材料科学 材料科学 材料科学
- 分析化学 分析化学
- 环境科学 环境科学
背景情况:
- 同时从水中去除和识别微量级的阴阳性染料污染物,由于极性和复杂的样本矩阵,这给水带来了重大挑战.
- 共价有机框架 (COF) 作为污染物修复的先进吸附剂具有潜力.
研究的目的:
- 合成和评估三种COF (EB-COF,TpPa-1和DP-COF) 作为吸附剂,用于提取和识别阴离子染料.
- 研究这些COF对甲基蓝 (MB) 和水晶紫 (CV) 的吸附性能和机制.
- 开发一种用于使用COF在激光脱/离子化飞行时间质谱法 (LDI-TOF MS) 中直接在矩阵上识别阴离子染料的方法.
主要方法:
- 使用具有不同功能组的2,4,6-三甲基醇合成三种COF.
- 吸附实验以确定MB和CV的容量和机制.
- 吸附等温的分析,动力学和热力学.
- 用DP-COF作为LDI-TOFMS中的矩阵来直接识别染料.
主要成果:
- 在DP-COF中,MB (383 mg g−1) 和CV (326 mg g−1) 的吸附能力高.
- DP-COF通过静电,π-π和H结合机制促进了动态相互作用.
- 基于COF的LDI-TOF MS方法实现了高灵敏度 (MB的LOD为0.12 ng mL−1,CV为0.04 ng mL−1),可重现性和低背景干扰.
- 在的废水和湖水样本中观察到出色的回收率 (81.4111.1%).
结论:
- 定制COF表面化学,特别是DP-COF中的碳素基,可以增强阴离子染料的选择性吸附.
- 使用LDI-TOFMS的DP-COF作为有效的矩阵,用于使用LDI-TOFMS的敏感和直接在矩阵上识别阴离子染料.
- 开发的方法是可靠的,适合分析复杂的环境水样中的阴阳性染料.
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