Enhanced preconcentration of selected chlorofluorocarbons on multiwalled carbon nanotubes with polar functionalities

Chutarat Saridara, Chaudhery Mustansar Hussain, Smruti Ragunath, Somenath Mitra

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Chromatographic monitoring of chlorofluorocarbons in air requires the preconcentration of these highly volatile species. In this paper, we present functionalized multiwalled carbon nanotubes as effective sorbents for amicrotrap designed for chlorofluorocarbons preconcentration. Among the commercial carbons and carbon nanotubes studied, functionalization via carboxylation and propyl amine was most effective for dichlorofluoromethane and trichlorofluoromethane (Freon 11), which were selected as representative chlorofluorocarbons. The results show that carbon nanotubes functionalized with a polar groups led to as much as a 300% increase in breakthrough volume and the desorption bandwidth was reduced by 2.5 times.

Original languageEnglish (US)
Pages (from-to)426-432
Number of pages7
JournalJournal of Separation Science
Volume38
Issue number3
DOIs
StatePublished - Feb 1 2015

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Filtration and Separation

Keywords

  • Breakthrough volume
  • Carbon nanotubes
  • Chlorofluorocarbons
  • Preconcentration
  • Surface functionalization

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