Activation of persulfates by carbon nanotubes

Oxidation of organic compounds by nonradical mechanism

Hongshin Lee, Hye Jin Lee, Joonseon Jeong, Jaesang Lee, Noh Back Park, Changha Lee

Research output: Contribution to journalArticle

192 Citations (Scopus)

Abstract

Carbon nanotubes (CNTs) have been found to activate persulfates (i.e., peroxymonosulfate and peroxydisulfate) into reactive species that are capable of oxidizing organic compounds in water. In the presence of single- or multi-walled CNTs, persulfates effectively degraded phenolic compounds and certain pharmaceuticals. Phenyl derivatives substituted with electron-withdrawing groups, such as benzoic acid and nitrobenzene, were resistant to degradation by the CNT/persulfate system. Based on observations regarding persulfate decomposition and linear sweep voltammetry using a CNT electrode, it has been suggested that persulfates bind onto the surface of CNTs, forming reactive complexes that are immediately decomposed upon reaction with organic compounds. Electron paramagnetic resonance spectroscopy with spin-trapping indicates that these reactive species are distinct from sulfate radical anions or hydroxyl radicals. The CNT-activated persulfate system shows promise as a novel treatment technology for the selective oxidation of organic contaminants in water.

Original languageEnglish
Pages (from-to)28-33
Number of pages6
JournalChemical Engineering Journal
Volume266
DOIs
Publication statusPublished - 2015 Apr 5

Fingerprint

Carbon Nanotubes
Organic compounds
organic compound
Carbon nanotubes
Chemical activation
oxidation
Oxidation
Benzoic Acid
Nitrobenzene
Benzoic acid
Water
phenolic compound
electron spin resonance
Voltammetry
hydroxyl radical
Hydroxyl Radical
Drug products
Anions
Paramagnetic resonance
trapping

Keywords

  • Carbon nanotube
  • Nonradical mechanism
  • Organic compounds
  • Oxidation
  • Persulfate

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)
  • Industrial and Manufacturing Engineering
  • Environmental Chemistry

Cite this

Activation of persulfates by carbon nanotubes : Oxidation of organic compounds by nonradical mechanism. / Lee, Hongshin; Lee, Hye Jin; Jeong, Joonseon; Lee, Jaesang; Park, Noh Back; Lee, Changha.

In: Chemical Engineering Journal, Vol. 266, 05.04.2015, p. 28-33.

Research output: Contribution to journalArticle

Lee, Hongshin ; Lee, Hye Jin ; Jeong, Joonseon ; Lee, Jaesang ; Park, Noh Back ; Lee, Changha. / Activation of persulfates by carbon nanotubes : Oxidation of organic compounds by nonradical mechanism. In: Chemical Engineering Journal. 2015 ; Vol. 266. pp. 28-33.
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