Sol-gel synthesized adsorbents for metal separation

L. L. Tavlarides, J. S. Lee, K. H. Nam, N. Agarwal

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


A series of organo-ceramic adsorbents have been synthesized by a sol-gel processing technique for metal ion extraction. These adsorbents generally have significantly high metal uptake capacities, good physical-chemical stabilities, and well-designed pore geometries compared to other pre-existing metal-chelating ceramic-based adsorbents. This work describes the synthesis and evaluation of pyrazole and calix[4]arene crown adsorbents for selective separation of platinum, palladium, and gold and cesium ions, respectively, from solutions. These materials exhibit mesoporous properties with high surface areas and pore volumes. The sol-gel synthesis starting with precursor silanes and titania results in gel particles of desired pore characteristics and high capacity and stability. Characterization studies, such as adsorption isotherms, breakthrough curves for fixed bed operation, and material stability, show promising results for applications to metal separation.

Original languageEnglish (US)
Pages (from-to)233-240
Number of pages8
JournalTsinghua Science and Technology
Issue number2
StatePublished - Apr 2006


  • Calix[4]arene
  • Mesoporous
  • Metal separation
  • Organo-ceramic adsorbent
  • Sol-gel synthesis

ASJC Scopus subject areas

  • General


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