Improving the Loading Capacity of Metal-Organic Framework Thin Films Using Optimized Linkers

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

5 Scopus Citations
View graph of relations

Author(s)

  • Wei Guo
  • Meiqin Zha
  • Zhengbang Wang
  • Engelbert Redel
  • Christof Wöll

Detail(s)

Original languageEnglish
Pages (from-to)24699-24702
Journal / PublicationACS Applied Materials and Interfaces
Volume8
Issue number37
Publication statusPublished - 21 Sep 2016

Abstract

The large surface area of metal-organic frameworks (MOFs) sparks great interest for their use in storage applications. While the bulk of MOF applications focuses on incorporation of gases, we demonstrate that these highly porous frameworks are also well-suited for metal ion storage. For well-defined, highly oriented surface-anchored MOF thin films grown on modified gold surfaces using liquid-phase epitaxy (LPE), also referred to as SURMOFs, we determined the loading of two different types of MOF materials with a total of seven types of metal ions (Zn2+, Ag+, Pd2+, Fe3+, Cd2+, Ni2+, and Co2+). Measurements using a quartz crystal microbalance (QCM) allowed determination of loading capacities as well as diffusion constants in a quantitative fashion. The adsorption capacities were observed to be highly ion specific; the largest uptake was for Fe3+ and Pd2+ ions with six and four metal ions per MOF pore, respectively. By comparing results for SURMOFs fabricated from different types of linkers, we demonstrate that S-containing functionalities in particular drastically improve the storage capacity of MOFs for metal ions.

Research Area(s)

  • ion uptake, MOF, optimized linkers, quartz crystal microbalance, SURMOF

Citation Format(s)

Improving the Loading Capacity of Metal-Organic Framework Thin Films Using Optimized Linkers. / Guo, Wei; Zha, Meiqin; Wang, Zhengbang; Redel, Engelbert; Xu, Zhengtao; Wöll, Christof.

In: ACS Applied Materials and Interfaces, Vol. 8, No. 37, 21.09.2016, p. 24699-24702.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal