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Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification
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Defect Engineering of MIL-101(Cr) for an Enhanced Water Adsorption Rate.

Masaki Wadaguchi1,2, Yuh Hijikata3, Hiroaki Iguchi2

  • 1Niterra Co., Ltd., 2808 Iwasaki, Komaki, Aichi 485-8510, Japan.

ACS Applied Materials & Interfaces
|June 5, 2026
PubMed
Summary

Defect engineering in MIL-101(Cr) using formate substitution enlarged pore size, significantly increasing water adsorption rates by up to 25%. This advancement enhances water adsorbents for high-throughput dehumidification devices.

Keywords:
MIL-101(Cr)adsorption kineticsdefectmetal−organic frameworkswater adsorption

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Nanotechnology

Background:

  • Water adsorbents are crucial for daily life and industry.
  • Improving water adsorption rate is key for high-throughput devices.
  • MIL-101(Cr) is a promising adsorbent material.

Purpose of the Study:

  • Enlarge the pore size of MIL-101(Cr) via defect engineering.
  • Enhance water diffusion and adsorption rate.
  • Investigate the impact of formate substitution on MIL-101(Cr) properties.

Main Methods:

  • Defect engineering of MIL-101(Cr) by substituting terephthalate linkers with formate.
  • Thermogravimetric analysis to confirm defect formation.
  • Pore size distribution analysis.
  • Evaluation of water adsorption rate.

Main Results:

  • Defect formation confirmed through thermogravimetric and pore size analyses.
  • Three distinct water adsorption processes identified with varying rates.
  • Water adsorption rate into large pores increased by up to 25% due to defects.
  • Defects promote water diffusion and condensed water transfer.

Conclusions:

  • Defect engineering effectively modifies MIL-101(Cr) pore structure.
  • Increased water adsorption rates are achieved through pore enlargement.
  • This strategy offers potential for developing high-throughput dehumidification technologies.