title: New multifunctional porous materials based on inorganic-organic hybrid single-walled carbon nanotubes: gas storage and high-sensitive detection of pesticides.
abstract: Single-walled carbon nanotubes (SWNTs) that are covalently functionalized with benzoic acid (SWNT-PhCOOH) can be integrated with transition-metal ions to form 3D porous inorganic-organic hybrid frameworks (SWNT-Zn). In particular, N(2)-adsorption analysis shows that the BET surface area increases notably from 645.3 to 1209.9 m(2)  g(-1) for SWNTs and SWNT-Zn, respectively. This remarkable enhancement in the surface area of SWNT-Zn is presumably due to the microporous motifs from benzoates coordinated to intercalated zinc ions between the functionalized SWNTs; this assignment was also corroborated by NLDFT pore-size distributions. In addition, the excess-H(2)-uptake maximum of SWNT-Zn reaches about 3.1 wt. % (12 bar, 77 K), which is almost three times that of the original SWNTs (1.2 wt. % at 12 bar, 77 K). Owing to its inherent conductivity and pore structure, as well as good dispersibility, SWNT-Zn is an effective candidate as a sensitive electrochemical stripping voltammetric sensor for organophosphate pesticides (OPs): By using solid-phase extraction (SPE) with SWNT-Zn-modified glassy carbon electrode, the detection limit of methyl parathion (MP) is 2.3 ng mL(-1).
authors.affiliation: Key Laboratory of Pesticide and Chemical Biology of Ministry of Education College of Chemistry, Central China Normal University, Wuhan, 430079, PR China.
authors.forename: Feng
authors.initials: F
authors.lastname: Wang
authors.forename: Jinbo
authors.initials: J
authors.lastname: Zhao
authors.forename: Jingming
authors.initials: J
authors.lastname: Gong
authors.forename: Lili
authors.initials: L
authors.lastname: Wen
authors.forename: Li
authors.initials: L
authors.lastname: Zhou
authors.forename: Dongfeng
authors.initials: D
authors.lastname: Li
mesh_terms: D019817:Benzoic Acid / Q000737:chemistry*; D006859:Hydrogen / Q000737:chemistry*; D037742:Nanotubes, Carbon / Q000737:chemistry*; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D010575:Pesticides / Q000032:analysis*; D016062:Porosity; D052616:Solid Phase Extraction; D013499:Surface Properties; D015032:Zinc / Q000737:chemistry*
chemical_list: D037742:Nanotubes, Carbon; D009942:Organometallic Compounds; D010575:Pesticides; D006859:Hydrogen; D019817:Benzoic Acid; D015032:Zinc