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 language | English |
|---|---|
| Pages (from-to) | 28-33 |
| Number of pages | 6 |
| Journal | Chemical Engineering Journal |
| Volume | 266 |
| DOIs | |
| Publication status | Published - 2015 Apr 5 |
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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 journal › Article
}
TY - JOUR
T1 - Activation of persulfates by carbon nanotubes
T2 - Oxidation of organic compounds by nonradical mechanism
AU - Lee, Hongshin
AU - Lee, Hye Jin
AU - Jeong, Joonseon
AU - Lee, Jaesang
AU - Park, Noh Back
AU - Lee, Changha
PY - 2015/4/5
Y1 - 2015/4/5
N2 - 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.
AB - 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.
KW - Carbon nanotube
KW - Nonradical mechanism
KW - Organic compounds
KW - Oxidation
KW - Persulfate
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U2 - 10.1016/j.cej.2014.12.065
DO - 10.1016/j.cej.2014.12.065
M3 - Article
VL - 266
SP - 28
EP - 33
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
SN - 1385-8947
ER -