The Impact of Structural Defects on Iodine Adsorption in UiO-66

John Maddock, Xinchen Kang, Lifei Liu, Buxing Han, Sihai Yang, Martin Schröder

Research output: Contribution to journalArticlepeer-review

Abstract

Radioactive I2 (iodine) produced as a by-product of nuclear fission poses a risk to public health if released into the environment, and it is thus vital to develop materials that can capture I2 vapour. Materials designed for the capture and storage of I2 must have a high uptake capacity and be stable for long-term storage due the long half-life of 129I. UiO-66 is a highly stable and readily tuneable metal-organic framework (MOF) into which defect sites can be introduced. Here, a defective form of UiO-66 (UiO-66-FA) was synthesised and the presence of missing cluster moieties confirmed using confocal fluorescence microscopy and gas sorption measurements. The uptake of I2 vapour in UiO-66-FA was measured using thermal gravimetric analysis coupled mass spectrometry (TGA-MS) to be 2.25 g g−1, almost twice that (1.17 g g−1) of the pristine UiO-66. This study will inspire the design of new efficient I2 stores based upon MOFs incorporating structural defects.
Original languageEnglish
Pages (from-to)525-531
Number of pages7
JournalChemistry
Volume3
Issue number2
DOIs
Publication statusPublished - Jun 2021

Keywords

  • UiO-66
  • defect
  • iodine adsorption
  • metal organic frameworks

Research Beacons, Institutes and Platforms

  • Dalton Nuclear Institute

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