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Visualization of gaseous iodine adsorption on single zeolitic imidazolate framework-90 particles

Author

Listed:
  • Yuting Lei

    (Southwest University of Science and Technology)

  • Guihua Zhang

    (Southwest University of Science and Technology)

  • Qinglan Zhang

    (Southwest University of Science and Technology)

  • Ling Yu

    (Southwest University of Science and Technology)

  • Hua Li

    (Southern University of Science and Technology)

  • Haili Yu

    (Southwest University of Science and Technology)

  • Yi He

    (Southwest University of Science and Technology)

Abstract

Zeolitic imidazolate frameworks (ZIFs) are very useful as high-capacity iodine (I2) adsorbents. The adsorption performance is usually probed by measuring a statistical average property over an entire sample consisting of a large number of ZIF particles, leaving the interparticle heterogeneity information among individuals. Here we report a dark-field microscopy (DFM) method to visualize gaseous I2 adsorption on single ZIF-90 particles in situ and in real time. The adsorption of I2 is found to alter the scattering spectrum of ZIF-90 particles, inducing a distinct color change from bluewhite to yellow. According to correlating the adsorption amount of gaseous I2 with the change of B value from DFM images, we quantitatively image the adsorption process and estimate the related kinetic parameters at the single particle level. Single particle measurements clarify the large particle-to-particle heterogeneity in adsorption reactivity and significant adsorption activity improvement of ZIF-90 after introduction of linker defects, which provides a microscopic understanding of the structure-activity relationship. We further demonstrate the capacity of this strategy for studying gaseous I2 adsorption on single ZIF-91 particle as a derivative of ZIF-90 to illustrate the generality.

Suggested Citation

  • Yuting Lei & Guihua Zhang & Qinglan Zhang & Ling Yu & Hua Li & Haili Yu & Yi He, 2021. "Visualization of gaseous iodine adsorption on single zeolitic imidazolate framework-90 particles," Nature Communications, Nature, vol. 12(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-24830-1
    DOI: 10.1038/s41467-021-24830-1
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    Cited by:

    1. Wei Zhou & Aimin Li & Min Zhou & Yiyao Xu & Yi Zhang & Qing He, 2023. "Nonporous amorphous superadsorbents for highly effective and selective adsorption of iodine in water," Nature Communications, Nature, vol. 14(1), pages 1-13, December.

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