Single-walled carbon nanotube paper as a sorbent for organic vapor preconcentration.
Single-walled carbon nanotubes were examined as an adsorptive material for a thermally desorbed preconcentrator for organic vapors. The nanotubes were processed into a paper form and packed into a metal tube for flow-through sampling. Adsorbed vapors were released by a temperature-programmed desorption method and detected downstream with a flexural plate wave vapor sensor. The tested vapors, methyl ethyl ketone, toluene, and dimethyl methylphosphonate, were released from the packed column at different temperatures. The vapors were retained more strongly than previously observed for the widely used Tenax porous polymer, indicating a significant affinity of the single walled nanotubes for organic vapors.
Zheng
Feng
F
Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, USA.
Baldwin
David L
DL
Fifield
Leonard S
LS
Anheier
Norman C
NC
Aardahl
Christopher L
CL
Grate
Jay W
JW