| Title: | Sorption Kinetics and Sequential Adsorption Analysis of Volatile Organic Compounds on Mesoporous Silica |
| Author(s): | Samaddar P; Hu J; Barua N; Wang Y; Lee TA; Prodanovic M; Heidari Z; Hutter T; |
| Address: | "Walker Department of Mechanical Engineering, The University of Texas at Austin, Austin, Texas78712, United States. Hildebrand Department of Petroleum and Geosystems Engineering, The University of Texas at Austin, Austin, Texas78712, United States. Materials Science and Engineering Program and Texas Materials Institute, The University of Texas at Austin, Austin, Texas78712, United States. Center for Subsurface Energy and the Environment, The University of Texas at Austin, Austin, Texas78712, United States" |
| ISSN/ISBN: | 2470-1343 (Electronic) 2470-1343 (Linking) |
| Abstract: | "Adsorption-desorption behaviors of polar and nonpolar volatile organic compounds (VOCs), namely, isopropanol and nonane, on mesoporous silica were studied using optical reflectance spectroscopy. Mesoporous silica was fabricated via electrochemical etching of silicon and subsequent thermal oxidation, resulting in an average pore diameter of 11 nm and a surface area of approximately 493 m(2)/g. The optical thickness of the porous layer, which is proportional to the number of adsorbed molecules, was measured using visible light reflectance interferometry. In situ adsorption and desorption kinetics were obtained for various mesoporous silica temperatures ranging from 10 to 70 degrees C. Sorption as a function of temperature was acquired for isopropanol and nonane. Sequential adsorption measurements of isopropanol and nonane were performed and showed that, when one VOC is introduced immediately following another, the second VOC displaces the first one regardless of the VOC's polarity and the strength of its interaction with the silica surface" |
| Notes: | "PubMed-not-MEDLINESamaddar, Pallabi Hu, Jinchuang Barua, Nirmalay Wang, Yixian Lee, Tse-Ang Prodanovic, Masa Heidari, Zoya Hutter, Tanya eng 2022/12/06 ACS Omega. 2022 Nov 16; 7(47):43130-43138. doi: 10.1021/acsomega.2c05608. eCollection 2022 Nov 29" |
