Thiol-functionalization of metal-organic framework by a facile coordination-based postsynthetic strategy and enhanced removal of Hg²⁺ from water

The presence of coordinatively unsaturated metal centers in metal-organic frameworks (MOFs) provides an accessible way to selectively functionalize MOFs through coordination bonds. In this work, we describe thiol-functionalization of MOFs by choosing a well known three-dimensional (3D) Cu-based MOF,...

Full description

Saved in:
Bibliographic Details
Published in:Journal of hazardous materials 2011-11, Vol.196, p.36-43
Main Authors: Ke, Fei, Qiu, Ling-Guang, Yuan, Yu-Peng, Peng, Fu-Min, Jiang, Xia, Xie, An-Jian, Shen, Yu-Hua, Zhu, Jun-Fa
Format: Article
Language:English
Subjects:
Adsorption
Applied sciences
Bonding
Chemical engineering
Diffraction
energy
Exact sciences and technology
heavy metals
Infrared spectroscopy
Kinetics
mercury
Mercury - isolation & purification
Metal-organic frameworks
Microscopy, Electron, Scanning
nitrogen
Organometallic Compounds - chemistry
Pollution
scanning electron microscopes
Scanning electron microscopy
Spectrophotometry, Infrared
Strategy
Sulfhydryl Compounds - chemistry
Surface Properties
thiols
Three dimensional
Unsaturated
water
Water Pollutants, Chemical - isolation & purification
Water Purification - methods
X-radiation
X-Ray Diffraction
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The presence of coordinatively unsaturated metal centers in metal-organic frameworks (MOFs) provides an accessible way to selectively functionalize MOFs through coordination bonds. In this work, we describe thiol-functionalization of MOFs by choosing a well known three-dimensional (3D) Cu-based MOF, i.e. [Cu₃(BTC)₂(H₂O)₃]ₙ (HKUST-1, BTC=benzene-1,3,5-tricarboxylate), by a facile coordination-based postsynthetic strategy, and demonstrate their application for removal of heavy metal ion from water. A series of [Cu₃(BTC)₂]ₙ samples stoichiometrically decorated with thiol groups has been prepared through coordination bonding of coordinatively unsaturated metal centers in HKUST-1 with –SH group in dithioglycol. The obtained thiol-functionalized samples were characterized by powder X-ray diffraction, scanning electron microscope, energy dispersive X-ray spectroscopy, infrared spectroscopy, and N₂ sorption–desorption isothermal. Significantly, the thiol-functionalized [Cu₃(BTC)₂]ₙ exhibited remarkably high adsorption affinity (Kd=4.73×10⁵mLg⁻¹) and high adsorption capacity (714.29mgg⁻¹) for Hg²⁺ adsorption from water, while the unfunctionalized HKUST-1 showed no adsorption of Hg²⁺ under the same condition.
ISSN:0304-3894
1873-3336
DOI:10.1016/j.jhazmat.2011.08.069