| Title: | "(1)H NMR Investigations of Activated Carbon Loaded with Volatile Organic Compounds: Quantification, Mechanisms, and Diffusivity Determination" |
| Author(s): | Le Bozec G; Giraudet S; Le Polles L; Le Cloirec P; |
| Address: | "Ecole Nationale Superieure de Chimie de Rennes, CNRS, UMR 6226, 11 allee de Beaulieu, CS 50837 35708 Rennes Cedex 07, France" |
| DOI: | 10.1021/acs.langmuir.6b03608 |
| ISSN/ISBN: | 1520-5827 (Electronic) 0743-7463 (Linking) |
| Abstract: | "Three volatile organic compounds (VOCs), benzene, cyclohexane, and dichloromethane, were adsorbed onto activated carbon fiber cloth. (1)H (magic-angle spinning (MAS) and pulsed field gradient (PFG)) NMR techniques were carried out, and the signals were analyzed in terms of peak surface areas and shifts. These techniques were shown to be very useful for determining (i) the intrinsic quantification of adsorbed molecules (VOCs and/or water) in the porosity of the materials (the adsorption capacities ranged from 0.2 to 4 mol.kg(-1)); (ii) the mechanisms of interactions between adsorbed organic molecules and the carbon walls (illustrations of positions of the molecule inside the pore volume are proposed; the proton-wall distance was less than 0.15 nm); and (iii) the diffusivities (surface diffusion coefficients (D(S)) were estimated at approximately 4.10(-12) m(2).s(-1) for cyclohexane, approximately 1.10(-11) m(2).s(-1) for benzene, and approximately 4.10(-11) m(2).s(-1) for dichloromethane)" |
| Notes: | "PubMed-not-MEDLINELe Bozec, Guirec Giraudet, Sylvain Le Polles, Laurent Le Cloirec, Pierre eng 2017/01/24 Langmuir. 2017 Feb 21; 33(7):1605-1613. doi: 10.1021/acs.langmuir.6b03608. Epub 2017 Feb 7" |
