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核心外磁共价有机框架的合成后修改,用于选择性去除

Amir Khojastehnezhad¹, Farid Moeinpour², Maziar Jafari¹

¹Department of Chemistry, University of Quebec at Montreal, Montreal, QC H3C3P8, Canada.

ACS applied materials & interfaces

|June 5, 2023

概括

磁性共价有机框架 (COF) 材料被功能化,用于超快速去除 (Hg). 这些新型磁性COF具有高吸附能力和快速动力学,可有效地修复重金属.

科学领域:

材料科学材料科学材料科学
环境化学环境化学
纳米技术纳米技术

背景情况:

共价有机框架 (COF) 为各种应用提供可调节的多孔结构.
磁性COF将COF的优点与磁性分离能力相结合.
对COF的功能化对于提高其在特定应用中的性能至关重要.

研究的目的:

为了合成和表征核心外磁性COF材料.
用有机配体进行后合成修改,使磁性COF具有功能.
研究功能化磁性COF对Hg的选择性和超快速吸附的效率.

主要方法:

核心外磁性COF合成. 这是一个非常好的方法.
通过有机配体 (例如, thiosemicarbazide) 的合成后修饰.
使用PXRD,BET,TGA,PiFM,TEM,SEM,XPS和固体13CNMR进行了表征.
使用动力和异热模型对Hg (II) 的吸附性研究.

主要成果:

成功合成了晶体和多孔的核心外磁性COF.
确认成功的功能化和良好的共价链接.
证明了Hg的选择性和超快速吸附.
吸附动力学遵循伪二阶模型和兰格穆尔等热法.
在5分钟内达到高Hg(II) 吸收能力.
吸附过程被确定为内热和自发的.

结论:

功能化的磁性COF是有效的快速和选择性的Hg(II) 移除.
开发的材料显示了重金属环境修复的前景.
合成后修饰是一种可行的策略,用于定制COF属性.

关键词:

Hg(II) 的移除方式.共价有机框架 (COFs) 是一种共价有机框架.捕获重金属捕获重金属废水净化废水净化废水净化水过水的过方法

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