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使用PO4装载的3D-NiFe层双氧化物从MIL-88A衍生而来的高度选择性和高效的Pb2+捕获

Mengwei Li¹, Vanessa Prévot², Zhixiong You³

¹School of Resource and Environmental Sciences, Wuhan University, China; Université Clermont Auvergne, CNRS, Institut de Chimie de Clermont- Ferrand, F-63000, Clermont-Ferrand, France.

|August 14, 2024

概括

新型酸盐功能化层状双氧化物 (LDH) 吸附剂有效地从水中去除 (Pb2+). 这种由金属有机框架制成的新材料显示出高容量和选择性,用于除污染.

科学领域:

环境科学环境科学
材料科学材料科学材料科学
化学化学化学

背景情况:

水中的 (Pb) 污染需要先进的整治技术.
酸盐沉是一种常见但有限的去除方法.
层状双氧化物 (LDH) 为水处理应用提供了潜力.

研究的目的:

开发新的3D半孔层双氧化物 (LDH) 吸附剂,使用酸盐离子功能化,以有效去除Pb2+.
使用一个牺牲模板金属有机框架 (MOF) 来合成稳定的LDH结构.
研究开发的离子LDH材料的吸附性能,动力学和选择性.

主要方法:

通过模板策略将MIL-88A(Fe) MOF转换为NixFe LDH.
离子交换反应以酸离子功能化LDH.
使用诸如表面积分析和吸附异热/动力学研究等技术对合成材料进行表征.

主要成果:

合成了高表面积 (>110 m2/g) 的NixFe-PO4 LDH稳定的3D微晶体.
根据Langmuir异温模型,达到538mg/g的高Pb2+吸附能力.
证明了快速吸附动力学 (伪秒序模型) 和对比Ni2+和Cd2+对Pb2+的高选择性.

结论:

这种新型的酸盐功能化LDH材料是一种高效的吸附剂,可从污染水中去除Pb2+.
MOF模板合成保持结构完整性,防止聚合,从而带来卓越的性能.
该材料的高容量,选择性和快速动力学使其成为水污染清除的有希望的候选者.

关键词:

3D MOF-衍生的分层双氧化物.Pb(2+) 的吸附方式.Pb(3)(PO(4))(2) 表面降水情况酸盐功能化的功能化

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