Removal of formaldehyde from air using functionalized silica supports

Abdunaser Ewlad-Ahmed, Michael A. Morris, Siddharth Patwardhan, Lorraine Gibson

Research output: Contribution to journalArticle

55 Citations (Scopus)

Abstract

This paper demonstrates the use of functionalized meso-silica materials (MCM-41 or SBA-15) as adsorbents for formaldehyde (H2CO) vapor from contaminated air. Additionally new green nanosilica (GNs) materials were prepared via a bioinspired synthesis route and were assessed for removal of H2CO from contaminated indoor air. These exciting new materials were prepared via rapid, 5 min, environmentally friendly synthesis routes avoiding any secondary pollution. They provided an excellent platform for functionalization and extraction of H2CO demonstrating similar performance to the conventional meso-silica materials. To the authors’ knowledge this is the first reported practical application of this material type. Prior to trapping, all materials were functionalized with amino-propyl groups which led to chemisorption of H2CO; removing it permanently from air. No retention of H2CO was achieved with nonfunctionalized material and it was observed that best extraction performance required a dynamic adsorption setup when compared to passive application. These results demonstrate the first application of GNs as potential adsorbents and functionalized meso-silica for use in remediation of air pollution in indoor air.
Original languageEnglish
Pages (from-to)13354-13360
Number of pages7
JournalEnvironmental Science and Technology
Volume46
Issue number24
Early online date26 Nov 2012
DOIs
Publication statusPublished - 18 Dec 2012

Keywords

  • formaldehyde
  • meso-silica materials
  • chemisorption
  • air pollution

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