| Title: | Adsorption of volatile organic compounds by metal-organic frameworks MIL-101: influence of molecular size and shape |
| Author(s): | Yang K; Sun Q; Xue F; Lin D; |
| Address: | "Department of Environmental Science, Zhejiang University, Hangzhou 310058, China. kyang@zju.edu.cn" |
| DOI: | 10.1016/j.jhazmat.2011.08.020 |
| ISSN/ISBN: | 1873-3336 (Electronic) 0304-3894 (Linking) |
| Abstract: | "Adsorption of gaseous volatile organic compounds (VOCs) on metal-organic frameworks MIL-101, a novel porous adsorbent with extremely large Langmuir surface area of 5870 m(2)/g and pore volume of 1.85 cm(3)/g, and the influence of VOC molecular size and shape on adsorption were investigated in this study. We observed that MIL-101 is a potential superior adsorbent for the sorptive removal of VOCs including polar acetone and nonpolar benzene, toluene, ethylbeznene, and xylenes. MIL-101 is of higher adsorption capacities for all selected VOCs than zeolite, activated carbon and other reported adsorbents. Adsorption of VOCs on MIL-101 is captured by a pore filling mechanism, showing the size and shape selectivity of VOC molecules. These prove to be a negative linear relationship between the volume adsorption capacities of VOCs and their molecular cross-sectional area values. Most VOC molecules, such as acetone, benzene, toluene, ethylbenzene and p-xylene, enter into MIL-101 pores with the planes having the minimum diameters. However, m-xylene and o-xylene may fill into the pores with the planes having the maximum diameters because of the preferred interaction of MIL-101 with the two methyl groups of adsorbate molecules" |
| Keywords: | "Adsorption Metals/*chemistry Microscopy, Electron, Transmission Molecular Weight Volatile Organic Compounds/*chemistry X-Ray Diffraction;" |
| Notes: | "MedlineYang, Kun Sun, Qian Xue, Feng Lin, Daohui eng Research Support, Non-U.S. Gov't Netherlands 2011/08/30 J Hazard Mater. 2011 Nov 15; 195:124-31. doi: 10.1016/j.jhazmat.2011.08.020. Epub 2011 Aug 11" |
