替代和定向对2DCOF的结晶性和PFAS吸附的影响
Amin Zarei1, Ahmadreza Khosropour1, Leila Khazdooz1
1Department of Food Science, College of Agriculture & Life Sciences, Cornell University, Stocking Hall, Ithaca, New York 14853, United States.
一个新的共价有机框架 (COF),COF-I,证明了从水中异常吸附和多基物质 (PFAS). 这种稳定,可重复使用的材料有效地将PFAS移除到低于法规限制的水平.
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:
- 和多醇基物质 (PFAS) 是持久的环境污染物,需要有效的清除策略.
- 开发具有对PFAS高 afinity的固相吸附剂对于净化水非常重要.
研究的目的:
- 合成和描述一种新的共价有机框架 (COF),称为COF-I,用于高效的PFAS吸附.
- 研究COF-I和一种改性水友衍生物的结构性质和吸附能力.
主要方法:
- 通过凝结反应合成的COF-I;以X射线衍射和CP/MAS ssNMR为特征.
- 通过将甲氧基组转化为基衍生物,使疏变为友的表面修饰.
- 用于确定堆叠安排 (AA和AB) 的原子模拟.
主要成果:
- COF-I 呈现出高结晶度,高表面积,以及优异的水解/热稳定性.
- 疏水性COF-I显示出优异的PFAS吸附性,相比于其亲水性对应物.
- COF-I有效地降低了 perfluorooctanoic 酸和 perfluorooctanesulfonic 酸度低于美国环保署建议水平.
结论:
- COF-I是一种高效的,可重复使用的吸附剂,用于从水环境中去除PFAS.
- 它的疏水性和特定的结构特征有助于其强大的PFAS结合亲和力.
- 该材料为解决水中的PFAS污染提供了一个有希望的解决方案.
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