相关实验视频

Updated: Jul 1, 2025

Preparation of Hydrophobic Metal-Organic Frameworks via Plasma Enhanced Chemical Vapor Deposition of Perfluoroalkanes for the Removal of Ammonia

Preparation of Hydrophobic Metal-Organic Frameworks via Plasma Enhanced Chemical Vapor Deposition of Perfluoroalkanes for the Removal of Ammonia

Published on: October 10, 2013

合成具有多个基组的金属有机框架,用于从废水中选择性捕获Ag (I)

Manying Zhu¹, Hao Wang¹, Xiang Liu¹

¹Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China; National Local Joint Laboratory of Engineering Application of Microwave Energy and Equipment Technology, Kunming, Yunnan 650093, China.

Journal of colloid and interface science

|March 4, 2024

概括

这项研究介绍了Zr-DPHT,一种用于有效地从废水中回收银离子的新型金属有机框架. Zr-DPHT具有很高的吸附能力和选择性,为贵金属回收利用提供了一个有前途的解决方案.

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:

从废水中提取离子银的回收在经济上很重要,但由于效率和选择性问题而具有挑战性.
贵金属回收对于可持续的资源管理和减少环境污染至关重要.

研究的目的:

开发一种新的金属有机框架 (MOF) 吸收剂,Zr-DPHT,用于从水溶液中高效和选择性地回收银离子 (Ag(I)).
为了研究吸附机制,动力学和热力学的Ag(I) 到Zr-DPHT.
评估Zr-DPHT的再生性能,用于贵金属回收的实际应用.

主要方法:

合成和Zr-DPHT金属有机框架的表征.
批量吸附实验以确定最佳条件 (pH,时间) 和吸附能力.
吸附异温和动力学研究,以了解吸附机制.
竞争性吸附实验以评估选择性.
吸附-脱附循环测试用于再生评估.

主要成果:

在5.5的最佳pH值下,Zr-DPHT对Ag (I) 的最大吸附能力为268.3 mg·g−1.
吸附过程被发现是内热的,在单层化学吸附 (Langmuir模型) 之后,内部扩散作为潜在的速度限制步骤.
该机制涉及静电相互作用和化,在竞争性吸附中,Ag (I) 显示出最大的分离系数 (9.64 mL·mg-1).
在多个吸附-脱附周期中,Zr-DPHT表现出了优异的再生性能.

结论:

Zr-DPHT是一种高效和选择性的吸附剂,用于从废水中捕获银离子.
该MOF显示出在贵金属回收中实际应用的潜力.
这项研究为利用MOF在贵金属回收领域提供了新的方向.

关键词:

吸附方式吸附方式吸附方式在 DFT 方面,它是最重要的.MOFs 的使用情况.选择性的选择性银离子是一种银离子.

更多相关视频

Author Spotlight: Characterizing Porous Materials for Aiding the Development of Robust Metal-Organic Frameworks with Adsorption Behavior

Author Spotlight: Characterizing Porous Materials for Aiding the Development of Robust Metal-Organic Frameworks with Adsorption Behavior

Published on: March 8, 2024

Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers

Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers

Published on: May 12, 2023

相关概念视频

Extraction: Advanced Methods

Extraction: Advanced Methods

Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...

Metal-Ligand Bonds

Metal-Ligand Bonds

The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...