null检测 | SRI8610C气相色谱应用资料13-华洋科仪

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Carbon nanotubes known as a novel discovered form of carbon. They are also expected to be excellent adsorbents for adsorption of trace pollutants from water or air.The objective of this paper is to study adsorption characteristics of isopropyl alcohol (IPA) vapor in the range of 40-800 ppmv from air stream with single-walled carbon nanotubes (SWCNTs).The test results indicated that the nature of the SWCNTs surface was greatly improved after purification by concentrated hypochlorous acid, which made SWCNTs become more hydrophilic and suitable for adsorption of IPA vapor from air stream. A significantly higher adsorption capacity of IPA vapor was found with purified SWCNTs than with raw SWCNTs. The BET isotherm is the best model to describe adsorption behavior of IPA vapor onto purified SWCNTs, followed by the Freundlich isotherm, and then the Langmuir isotherm.

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