PMID- 18200854
OWN - NLM
STAT- MEDLINE
DCOM- 20080312
LR  - 20190715
IS  - 0013-936X (Print)
IS  - 0013-936X (Linking)
VI  - 41
IP  - 24
DP  - 2007 Dec 15
TI  - Adsorption of polar and nonpolar organic chemicals to carbon nanotubes.
PG  - 8295-300
AB  - Understanding adsorptive interactions between organic contaminants and carbon 
      nanotubes is critical to both the environmental application of carbon nanotubes 
      as special adsorbents and the assessment of the potential impact of carbon 
      nanotubes on the fate and transport of organic contaminants in the environment. 
      The adsorption of organic compounds with varied physical-chemical properties 
      (hydrophobicity, polarity, electron polarizability, and size) to one 
      single-walled carbon nanotube (SWNT) and two multiwalled carbon nanotubes (MWNTs) 
      was evaluated. For a given carbon nanotube, the adsorption affinity correlated 
      poorly with hydrophobicity but increased in the order of nonpolar aliphatic < 
      nonpolar aromatics < nitroaromatics, and within the group of nitroaromatics, the 
      adsorption affinity increased with the number of nitrofunctional groups. We 
      propose that the strong adsorptive interaction between carbon nanotubes and 
      nitroaromatics was due to the pi-pi electron-donor-acceptor (EDA) interaction 
      between nitroaromatic molecules (electron acceptors) and the highly polarizable 
      graphene sheets (electron donors) of carbon nanotubes. Additionally, we attribute 
      the stronger adsorption of nonpolar aromatics compared to that of nonpolar 
      aliphatics to the pi-electron coupling between the flat surfaces of both aromatic 
      molecules and carbon nanotubes. For tetrachlorobenzene, the bulkiest adsorbate, 
      adsorption affinity (on a unit surface area basis) to the SWNT was much stronger 
      than to the two MWNTs, indicating a probable molecular sieving effect.
FAU - Chen, Wei
AU  - Chen W
AD  - Tianjin Key Laboratory of Environmental Remediation and Pollution Control/College 
      of Environmental Science and Engineering, Nankai University, Tianjin 300071, 
      China.
FAU - Duan, Lin
AU  - Duan L
FAU - Zhu, Dongqiang
AU  - Zhu D
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - United States
TA  - Environ Sci Technol
JT  - Environmental science & technology
JID - 0213155
RN  - 0 (Environmental Pollutants)
RN  - 0 (Nanotubes, Carbon)
RN  - 0 (Organic Chemicals)
SB  - IM
MH  - Adsorption
MH  - Environmental Pollutants/chemistry
MH  - *Nanotubes, Carbon
MH  - Organic Chemicals/*chemistry
EDAT- 2008/01/19 09:00
MHDA- 2008/03/13 09:00
CRDT- 2008/01/19 09:00
PHST- 2008/01/19 09:00 [pubmed]
PHST- 2008/03/13 09:00 [medline]
PHST- 2008/01/19 09:00 [entrez]
AID - 10.1021/es071230h [doi]
PST - ppublish
SO  - Environ Sci Technol. 2007 Dec 15;41(24):8295-300. doi: 10.1021/es071230h.