单壁碳纳米管纸作为用于有机蒸汽预浓缩的吸附剂。

Single-walled carbon nanotube paper as a sorbent for organic vapor preconcentration.

作者信息

Zheng Feng, Baldwin David L, Fifield Leonard S, Anheier Norman C, Aardahl Christopher L, Grate Jay W

机构信息

Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, USA.

出版信息

Anal Chem. 2006 Apr 1;78(7):2442-6. doi: 10.1021/ac051524q.

DOI:10.1021/ac051524q

PMID:16579632

Abstract

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.

摘要

研究了单壁碳纳米管作为热脱附预浓缩器中用于有机蒸汽的吸附材料。将纳米管加工成纸状并装入金属管中进行流通式采样。通过程序升温脱附法释放吸附的蒸汽，并在下游用弯曲板波蒸汽传感器进行检测。测试的蒸汽，即甲乙酮、甲苯和甲基膦酸二甲酯，在不同温度下从填充柱中释放出来。这些蒸汽的保留比以前观察到的广泛使用的Tenax多孔聚合物更强，表明单壁纳米管对有机蒸汽具有显著的亲和力。