Base-resistant adsorbents prepared using diamino group-grafted mesoporous silica uniformly coated with zirconia

Masaki Okamoto, Haruka Satake, Hiroyuki Seki

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3 Citations (Scopus)

Abstract

The mesopore walls of ordered mesoporous silicas were coated with zirconia layers at room temperature using zirconia tetra-n-butoxide dissolved in dry toluene. It was found that coating the silicas three times with zirconia layers was sufficient to completely cover their pore walls with zirconia. The coated mesoporous silicas demonstrated high resistance to a 2 M sodium hydroxide solution at 0 °C. Prior to being coated three times with the zirconia layers, the silica walls were partially coated with 3-(2-aminoethylamino)propyltrimethoxysilane so that diamino groups could be grafted onto the pore walls; this was done so that they could be used as base-resistant adsorbents for copper(ii) ions that had been dissolved in basic solutions. The grafted diamino groups, which captured copper(ii) ions, were protected from the basic solution, as the silyl in the diamino groups was covered with zirconia layers.

Original languageEnglish
Pages (from-to)24425-24432
Number of pages8
JournalJournal of Materials Chemistry A
Volume5
Issue number46
DOIs
Publication statusPublished - 2017 Jan 1
Externally publishedYes

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ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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