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Cai J, Yan Y, Wang W, Ma Y, Cai L, Wu L, Zhou H. Detection of formic acid and acetic acid gases by a QCM sensor coated with an acidified multi-walled carbon nanotube membrane. ENVIRONMENTAL TECHNOLOGY 2023; 44:751-761. [PMID: 34582318 DOI: 10.1080/09593330.2021.1983025] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Accepted: 09/13/2021] [Indexed: 06/13/2023]
Abstract
In this paper, the acidified multi-walled carbon nanotubes (MWCNTs) film was coated on the quartz crystal microbalance (QCM) to prepare a high-performance sensor for the real-time detection of organic acid gases. The material characteristics of the thin films were analysed by field emission scanning electro microscopy (FESEM), Raman spectra and X-ray photoelectron spectroscopy (XPS). The organic acid vapours' sensing results indicated that acidized-MWCNTs thin film exhibited good frequency response, repeatability, reversibility and stability. There is a clear linear relationship between the frequency offset and the organic acid vapours with concentration below 5.0 ppm, and the detection limit of 0.77 and 0.73 ppm for formic and acetic acid vapours, respectively. The sensor shows the highest response to formic acid vapour than acetic acid vapour which may be ascribed to molecular polarity. Furthermore, a sensing mechanism model was introduced to understand the adsorption reaction between organic acid molecules and acidized-MWCNTs. This paper proves that acidized-MWCNTs is a potential and suitable material for organic acid vapour detection when combined with a QCM sensor.
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Affiliation(s)
- Jingfang Cai
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai, People's Republic of China
| | - Ying Yan
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai, People's Republic of China
- Shandong Key Laboratory of Corrosion Science, Institute of Oceanology, Chinese Academy of Science, Shandong, People's Republic of China
| | - Weiwei Wang
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai, People's Republic of China
| | - Yuanyuan Ma
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai, People's Republic of China
| | - Lankun Cai
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai, People's Republic of China
| | - Laiming Wu
- Shanghai Museum, Shanghai, People's Republic of China
| | - Hao Zhou
- Shanghai Museum, Shanghai, People's Republic of China
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2
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Shi W, Tiwari SP, Thompson RL, Culp JT, Hong L, Hopkinson DP, Smith K, Resnik K, Steckel JA, Siefert NS. Computational Screening of Physical Solvents for CO 2 Pre-combustion Capture. J Phys Chem B 2021; 125:13467-13481. [PMID: 34734716 DOI: 10.1021/acs.jpcb.1c07268] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A computational scheme was used to screen physical solvents for CO2 pre-combustion capture by integrating the commercial NIST database, an in-house computational database, chem-informatics, and molecular modeling. A commercially available screened hydrophobic solvent, diethyl sebacate, was identified from the screening with favorable physical properties and promising absorption performance. The promising performance to use diethyl sebacate in CO2 pre-combustion capture has also been confirmed from experiments. Water loading in diethyl sebacate is very low, and therefore, water is kept with H2 in the gas stream. The favorable CO2 interaction with diethyl sebacate and the intermediate solvent free volume fraction leads to both high CO2 solubility and high CO2/H2 solubility selectivity in diethyl sebacate. An in-house NETL computational database was built to characterize CO2, H2, N2, and H2O interactions with 202 different chemical functional groups. It was found that 13% of the functional groups belong to the strong interaction category with the CO2 interaction energy between -15 and -21 kJ/mol; 62% of the functional groups interact intermediately with CO2 (-8 to -15 kJ/mol). The remaining 25% of functional groups interact weakly with CO2 (below -8 kJ/mol). In addition, calculations show that CO2 interactions with the functional groups are stronger than N2 and H2 interactions but are weaker than H2O interactions. The CO2 and H2O interactions with the same functional groups exhibit a very strong linear positive correlation coefficient of 0.92. The relationship between CO2 and H2 gas solubilities and solvent fractional free volume (FFV) has been systematically studied for seven solvents at 298.2 K. A skewed bell-shaped relation was obtained between CO2 solubility and solvent FFV. When an organic compound has a density approximately 10% lower than its density at 298.2 K and 1 bar, it exhibits the highest CO2 loading at that specific solvent density and FFV. Note that the solvent densities were varied using simulations, which are difficult to be obtained from the experiment. In contrast, H2 solubility results exhibit an almost perfect positive linear correlation with the solvent FFV. The theoretical maximum and minimum physical CO2 solubilities in any organic compound at 298.2 K were estimated to be 11 and 0.4 mol/MPa L, respectively. An examination of 182 experimental CO2 physical solubility data and 29 simulated CO2 physical solubilities shows that all the CO2 physical solubility data are within the maximum and minimum with only a few exceptions. Finally, simulations suggest that in order to develop physical solvents with both high CO2 solubility and high CO2/H2 solubility selectivity, the solvents should contain functional groups which are available to interact strongly with CO2 while minimizing FFV.
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Affiliation(s)
- Wei Shi
- National Energy Technology Laboratory, 626 Cochrans Mill Road, P.O. Box 10940, Pittsburgh, Pennsylvania 15236-0940, United States.,NETL Support Contractor, 626 Cochrans Mill Road, P.O. Box 10940, Pittsburgh, Pennsylvania 15236-0940, United States
| | - Surya P Tiwari
- National Energy Technology Laboratory, 626 Cochrans Mill Road, P.O. Box 10940, Pittsburgh, Pennsylvania 15236-0940, United States.,NETL Support Contractor, 626 Cochrans Mill Road, P.O. Box 10940, Pittsburgh, Pennsylvania 15236-0940, United States
| | - Robert L Thompson
- National Energy Technology Laboratory, 626 Cochrans Mill Road, P.O. Box 10940, Pittsburgh, Pennsylvania 15236-0940, United States.,NETL Support Contractor, 626 Cochrans Mill Road, P.O. Box 10940, Pittsburgh, Pennsylvania 15236-0940, United States
| | - Jeffrey T Culp
- National Energy Technology Laboratory, 626 Cochrans Mill Road, P.O. Box 10940, Pittsburgh, Pennsylvania 15236-0940, United States.,NETL Support Contractor, 626 Cochrans Mill Road, P.O. Box 10940, Pittsburgh, Pennsylvania 15236-0940, United States
| | - Lei Hong
- National Energy Technology Laboratory, 626 Cochrans Mill Road, P.O. Box 10940, Pittsburgh, Pennsylvania 15236-0940, United States.,NETL Support Contractor, 626 Cochrans Mill Road, P.O. Box 10940, Pittsburgh, Pennsylvania 15236-0940, United States
| | - David P Hopkinson
- National Energy Technology Laboratory, 626 Cochrans Mill Road, P.O. Box 10940, Pittsburgh, Pennsylvania 15236-0940, United States
| | - Kathryn Smith
- National Energy Technology Laboratory, 626 Cochrans Mill Road, P.O. Box 10940, Pittsburgh, Pennsylvania 15236-0940, United States.,Carbon Capture Scientific, 4000 Brownsville Road, South Park, Pennsylvania 15129, United States
| | - Kevin Resnik
- National Energy Technology Laboratory, 626 Cochrans Mill Road, P.O. Box 10940, Pittsburgh, Pennsylvania 15236-0940, United States.,NETL Support Contractor, 626 Cochrans Mill Road, P.O. Box 10940, Pittsburgh, Pennsylvania 15236-0940, United States
| | - Janice A Steckel
- National Energy Technology Laboratory, 626 Cochrans Mill Road, P.O. Box 10940, Pittsburgh, Pennsylvania 15236-0940, United States
| | - Nicholas S Siefert
- National Energy Technology Laboratory, 626 Cochrans Mill Road, P.O. Box 10940, Pittsburgh, Pennsylvania 15236-0940, United States
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3
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Kobashi K, Iizumi Y, Muroga S, Morimoto T, Okazaki T. N 2 Gas Adsorption Sites of Single-Walled Carbon Nanotube Bundles: Identifying Interstitial Channels at Very Low Relative Pressure. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:9144-9150. [PMID: 34288694 DOI: 10.1021/acs.langmuir.1c01248] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Utilizing the nanoscale space created by carbon nanotubes (CNTs) is of importance for applications like energy storage devices, sensors, and functional materials. Gas adsorption is a versatile, quantitative characterization method to analyze nanoscale pore sizes and volumes. Here, we inspected N2 adsorption to the nanospace formed by the bundles of single-walled CNTs with an average nanotube diameter of ca. 2.0 nm and its distributions of 0.7-4.1 nm. Based on comparisons among the as-grown, purified (opened), and heat-treated (closed) CNTs with similar geometric bundle structures, we found that the interstitial channels emerged from a very low relative pressure of approximately 10-8 by removing the impurities from the CNT bundles, which is the first empirical demonstration. These findings can not only be utilized to understand the structures of CNT films, fibers, and bulks but also applied to porous materials science.
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Affiliation(s)
- Kazufumi Kobashi
- CNT-Application Research Center, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
| | - Yoko Iizumi
- CNT-Application Research Center, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
| | - Shun Muroga
- CNT-Application Research Center, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
| | - Takahiro Morimoto
- CNT-Application Research Center, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
| | - Toshiya Okazaki
- CNT-Application Research Center, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
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4
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DFT studies on the interactions of pristine, Al and Ga-doped boron nitride nanosheets with CH3X (X=F, Cl and Br). J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2019.126962] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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5
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Yoosefian M, Etminan N, Juan A, Mirhaji E. Ultra-low concentration protein detection based on phenylalanine–Pd/SWCNT as a high sensitivity nanoreceptor. RSC Adv 2020; 10:2650-2660. [PMID: 35496082 PMCID: PMC9048758 DOI: 10.1039/c9ra09243a] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Accepted: 12/26/2019] [Indexed: 11/21/2022] Open
Abstract
Early detection of proteins could help to reduce disease progress. The amino acid hybrid with the Pd/SWCNT supporting enhanced transducer provides a high sensitivity biocompatible bioelectrode in nanobiosensors for use in early disease diagnosis.
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Affiliation(s)
- Mehdi Yoosefian
- Department of Nanotechnology
- Graduate University of Advanced Technology
- Kerman
- Iran
| | - Nazanin Etminan
- Chemistry Department
- University of Payam-noor
- 19395-4697 Tehran
- Iran
| | - Alfredo Juan
- Departamento de Física & IFISUR (UNS-CONICET)
- Universidad Nacional del Sur
- Bahia Blanca
- Argentina
| | - Elnaz Mirhaji
- Department of Nanotechnology
- Graduate University of Advanced Technology
- Kerman
- Iran
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6
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Doust Mohammadi M, Hamzehloo M. The adsorption of bromomethane onto the exterior surface of aluminum nitride, boron nitride, carbon, and silicon carbide nanotubes: A PBC-DFT, NBO, and QTAIM study. COMPUT THEOR CHEM 2018. [DOI: 10.1016/j.comptc.2018.10.001] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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7
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Abbasi M, Nemati-Kande E, Mohammadi MD. Doping of the first row transition metals onto B 12 N 12 nanocage: A DFT study. COMPUT THEOR CHEM 2018. [DOI: 10.1016/j.comptc.2018.04.003] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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8
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Sha H, Faller R. A quantum chemistry study of curvature effects on boron nitride nanotubes/nanosheets for gas adsorption. Phys Chem Chem Phys 2016; 18:19944-9. [PMID: 27399852 DOI: 10.1039/c6cp02540d] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Various boron nitride sheets interacting with noble gases, oxygen, and water on both sides of the surface were studied using high level DFT.
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Affiliation(s)
- Haoyan Sha
- Department of Chemical Engineering
- University of California, Davis
- Davis
- USA
| | - Roland Faller
- Department of Chemical Engineering
- University of California, Davis
- Davis
- USA
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9
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Heavy metal removal from aqueous solution by advanced carbon nanotubes: Critical review of adsorption applications. Sep Purif Technol 2016. [DOI: 10.1016/j.seppur.2015.11.039] [Citation(s) in RCA: 781] [Impact Index Per Article: 97.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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10
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Zhang X, Gong X. Theoretical investigation of rare gas adsorption on and inside B-doped carbon nanotubes by DFT, QTAIM and NBO. RSC Adv 2015. [DOI: 10.1039/c5ra10657e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Structures and intramolecular interactions of complexes formed by 1–2 boron atom doped CNTs with rare gases were studied.
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Affiliation(s)
- Xueli Zhang
- School of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing 210094
- China
| | - Xuedong Gong
- School of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing 210094
- China
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11
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Kaiser A, Zöttl S, Bartl P, Leidlmair C, Mauracher A, Probst M, Denifl S, Echt O, Scheier P. Methane adsorption on aggregates of fullerenes: site-selective storage capacities and adsorption energies. CHEMSUSCHEM 2013; 6:1235-44. [PMID: 23744834 PMCID: PMC3799018 DOI: 10.1002/cssc.201300133] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2013] [Indexed: 05/13/2023]
Abstract
Methane adsorption on positively charged aggregates of C60 is investigated by both mass spectrometry and computer simulations. Calculated adsorption energies of 118-281 meV are in the optimal range for high-density storage of natural gas. Groove sites, dimple sites, and the first complete adsorption shells are identified experimentally and confirmed by molecular dynamics simulations, using a newly developed force field for methane-methane and fullerene-methane interaction. The effects of corrugation and curvature are discussed and compared with data for adsorption on graphite, graphene, and carbon nanotubes.
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Affiliation(s)
- Alexander Kaiser
- Institut für Ionenphysik und Angewandte Physik, Universität InnsbruckTechniker Str. 25, 6020 Innsbruck (Austria)
| | - Samuel Zöttl
- Institut für Ionenphysik und Angewandte Physik, Universität InnsbruckTechniker Str. 25, 6020 Innsbruck (Austria)
| | - Peter Bartl
- Institut für Ionenphysik und Angewandte Physik, Universität InnsbruckTechniker Str. 25, 6020 Innsbruck (Austria)
| | - Christian Leidlmair
- Institut für Ionenphysik und Angewandte Physik, Universität InnsbruckTechniker Str. 25, 6020 Innsbruck (Austria)
| | - Andreas Mauracher
- Institut für Ionenphysik und Angewandte Physik, Universität InnsbruckTechniker Str. 25, 6020 Innsbruck (Austria)
| | - Michael Probst
- Institut für Ionenphysik und Angewandte Physik, Universität InnsbruckTechniker Str. 25, 6020 Innsbruck (Austria)
| | - Stephan Denifl
- Institut für Ionenphysik und Angewandte Physik, Universität InnsbruckTechniker Str. 25, 6020 Innsbruck (Austria)
| | - Olof Echt
- Institut für Ionenphysik und Angewandte Physik, Universität InnsbruckTechniker Str. 25, 6020 Innsbruck (Austria)
- Department of Physics, University of New HampshireDurham, NH 03824 (USA)
| | - Paul Scheier
- Institut für Ionenphysik und Angewandte Physik, Universität InnsbruckTechniker Str. 25, 6020 Innsbruck (Austria)
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12
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Detecting adsorption space in carbon nanotubes by benzene uptake. J Colloid Interface Sci 2013; 391:74-85. [DOI: 10.1016/j.jcis.2012.09.026] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2012] [Revised: 09/07/2012] [Accepted: 09/11/2012] [Indexed: 11/19/2022]
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13
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Zöttl S, Kaiser A, Bartl P, Leidlmair C, Mauracher A, Probst M, Denifl S, Echt O, Scheier P. Methane Adsorption on Graphitic Nanostructures: Every Molecule Counts. J Phys Chem Lett 2012; 3:2598-2603. [PMID: 23378887 PMCID: PMC3560424 DOI: 10.1021/jz301106x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2012] [Accepted: 08/28/2012] [Indexed: 05/27/2023]
Abstract
Bundles of single-walled nanotubes are promising candidates for storage of hydrogen, methane, and other hydrogen-rich molecules, but experiments are hindered by nonuniformity of the tubes. We overcome the problem by investigating methane adsorption on aggregates of fullerenes containing up to six C(60); the systems feature adsorption sites similar to those of nanotube bundles. Four different types of adsorption sites are distinguished, namely, registered sites above the carbon hexagons and pentagons, groove sites between adjacent fullerenes, dimple sites between three adjacent fullerenes, and exterior sites. The nature and adsorption energies of the sites in C(60) aggregates are determined by density functional theory and molecular dynamics (MD) simulations. Excellent agreement between experiment and theory is obtained for the adsorption capacity in these sites.
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Affiliation(s)
- Samuel Zöttl
- Institut für Ionenphysik
und Angewandte Physik, Universität Innsbruck, Techniker Strasse 25, A-6020 Innsbruck, Austria
| | - Alexander Kaiser
- Institut für Ionenphysik
und Angewandte Physik, Universität Innsbruck, Techniker Strasse 25, A-6020 Innsbruck, Austria
| | - Peter Bartl
- Institut für Ionenphysik
und Angewandte Physik, Universität Innsbruck, Techniker Strasse 25, A-6020 Innsbruck, Austria
| | - Christian Leidlmair
- Institut für Ionenphysik
und Angewandte Physik, Universität Innsbruck, Techniker Strasse 25, A-6020 Innsbruck, Austria
| | - Andreas Mauracher
- Institut für Ionenphysik
und Angewandte Physik, Universität Innsbruck, Techniker Strasse 25, A-6020 Innsbruck, Austria
| | - Michael Probst
- Institut für Ionenphysik
und Angewandte Physik, Universität Innsbruck, Techniker Strasse 25, A-6020 Innsbruck, Austria
| | - Stephan Denifl
- Institut für Ionenphysik
und Angewandte Physik, Universität Innsbruck, Techniker Strasse 25, A-6020 Innsbruck, Austria
| | - Olof Echt
- Institut für Ionenphysik
und Angewandte Physik, Universität Innsbruck, Techniker Strasse 25, A-6020 Innsbruck, Austria
- Department of Physics, University of New Hampshire, Durham, New Hampshire
03824, United States
| | - Paul Scheier
- Institut für Ionenphysik
und Angewandte Physik, Universität Innsbruck, Techniker Strasse 25, A-6020 Innsbruck, Austria
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14
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Cannon JJ, Vlugt TJH, Dubbeldam D, Maruyama S, Shiomi J. Simulation Study on the Adsorption Properties of Linear Alkanes on Closed Nanotube Bundles. J Phys Chem B 2012; 116:9812-9. [DOI: 10.1021/jp3039225] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- James J. Cannon
- Department of Mechanical
Engineering, The University of Tokyo, 7-3-1
Hongo, Bunkyo-ku, Tokyo
113-8656, Japan
| | - Thijs J. H. Vlugt
- Process & Energy Laboratory, Process & Energy Department, Delft University of Technology, Leeghwaterstraat 44, 2628 CA Delft, The Netherlands
| | - David Dubbeldam
- Van ’t
Hoff Institute for
Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Shigeo Maruyama
- Department of Mechanical
Engineering, The University of Tokyo, 7-3-1
Hongo, Bunkyo-ku, Tokyo
113-8656, Japan
| | - Junichiro Shiomi
- Department of Mechanical
Engineering, The University of Tokyo, 7-3-1
Hongo, Bunkyo-ku, Tokyo
113-8656, Japan
- Japan Science and Technology Agency, CREST, Chiyoda, Tokyo 102-0075, Japan
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15
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Albesa AG, Rafti M, Rawat DS, Vicente JL, Migone AD. Ethane/ethylene adsorption on carbon nanotubes: temperature and size effects on separation capacity. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:1824-1832. [PMID: 22168522 DOI: 10.1021/la204314a] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We present the results of Monte Carlo simulations of the adsorption of single-component ethane and ethylene and of equimolar mixtures of these two gases on bundles of closed, single-walled carbon nanotubes. Two types of nanotube bundles were used in the simulations: homogeneous (i.e., those in which all the nanotubes have identical diameters) and heterogeneous (those in which nanotubes of different diameters are allowed). We found that at the same pressure and temperature more ethane than ethylene adsorbs on the bundles over the entire range of pressures and temperatures explored. The simulation results for the equimolar mixtures show that the pressure at which maximum separation is attained is a very sensitive function of the diameter of the nanotubes present in the bundles. Simulations using heterogeneous bundles yield better agreement with single-component experimental data for isotherms and isosteric heats than those obtained from simulations using homogeneous bundles. Possible applications of nanotubes in gas separation are discussed. We explored the effect of the diameter of the nanotubes on the separation ability of these sorbents, both for the internal and for the external sites. We found that substrate selectivity is a decreasing function of temperature.
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Affiliation(s)
- Alberto G Albesa
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, CC 16, Sucursal 4 (1900) La Plata, Argentina.
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16
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Shi W, Damodaran K, Nulwala HB, Luebke DR. Theoretical and experimental studies of water interaction in acetate based ionic liquids. Phys Chem Chem Phys 2012; 14:15897-908. [DOI: 10.1039/c2cp42975f] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Shi W, Myers CR, Luebke DR, Steckel JA, Sorescu DC. Theoretical and Experimental Studies of CO2 and H2 Separation Using the 1-Ethyl-3-methylimidazolium Acetate ([emim][CH3COO]) Ionic Liquid. J Phys Chem B 2011; 116:283-95. [DOI: 10.1021/jp205830d] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wei Shi
- National Energy Technology Laboratory, U.S. Department of Energy, Pittsburgh, Pennsylvania 15236, United States
- URS Corporation, South Park, Pennsylvania 15129, United States
- Department of Chemical and Petroleum Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - Christina R. Myers
- National Energy Technology Laboratory, U.S. Department of Energy, Pittsburgh, Pennsylvania 15236, United States
| | - David R. Luebke
- National Energy Technology Laboratory, U.S. Department of Energy, Pittsburgh, Pennsylvania 15236, United States
| | - Janice A. Steckel
- National Energy Technology Laboratory, U.S. Department of Energy, Pittsburgh, Pennsylvania 15236, United States
| | - Dan C. Sorescu
- National Energy Technology Laboratory, U.S. Department of Energy, Pittsburgh, Pennsylvania 15236, United States
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18
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Rawat DS, Migone AD. Ethylene Films Adsorbed onto Purified HiPco Single Walled Carbon Nanotubes: A Comparison with Ethane and Longer Alkanes. ADSORPT SCI TECHNOL 2011. [DOI: 10.1260/0263-6174.29.8.723] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Affiliation(s)
- Dinesh S. Rawat
- Department of Physics, Southern Illinois University, Carbondale, IL-62901, U.S.A
| | - Aldo D. Migone
- Department of Physics, Southern Illinois University, Carbondale, IL-62901, U.S.A
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19
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20
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Shi W, Sorescu DC. Molecular Simulations of CO2 and H2 Sorption into Ionic Liquid 1-n-Hexyl-3-methylimidazolium Bis(trifluoromethylsulfonyl)amide ([hmim][Tf2N]) Confined in Carbon Nanotubes. J Phys Chem B 2010; 114:15029-41. [DOI: 10.1021/jp106500p] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wei Shi
- National Energy Technology Laboratory, U.S. Department of Energy, Pittsburgh, Pennsylvania 15236, United States, and URS Corporation, South Park, Pennsylvania 15129, United States
| | - Dan C. Sorescu
- National Energy Technology Laboratory, U.S. Department of Energy, Pittsburgh, Pennsylvania 15236, United States, and URS Corporation, South Park, Pennsylvania 15129, United States
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Garberoglio G. Single-particle and collective dynamics of methanol confined in carbon nanotubes: a computer simulation study. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2010; 22:415104. [PMID: 21386594 DOI: 10.1088/0953-8984/22/41/415104] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We present the results of computer simulations of methanol confined in carbon nanotubes. Different levels of confinement were identified as a function of the nanotube radius and characterized using a pair-distribution function adapted to the cylindrical geometry of these systems. Dynamical properties of methanol were also analysed as a function of the nanotube size, both at the level of single-particle and collective properties. We found that confinement in narrow carbon nanotubes strongly affects the dynamical properties of methanol with respect to the bulk phase, due to the strong interaction with the carbon nanotube. In the other cases, confined methanol shows properties quite similar to those of the bulk phase. These phenomena are related to the peculiar hydrogen bonded network of methanol and are compared to the behaviour of water confined in similar conditions. The effect of nanotube flexibility on the dynamical properties of confined methanol is also discussed.
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Affiliation(s)
- Giovanni Garberoglio
- Interdisciplinary Laboratory for Computational Science (LISC), FBK-CMM and University of Trento, via Sommarive 18, I-38123 Povo (TN), Italy.
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Hirano A, Maeda Y, Yuan X, Ueki R, Miyazawa Y, Fujita JI, Akasaka T, Shiraki K. Controlled Dispersion and Purification of Protein-Carbon Nanotube Conjugates Using Guanidine Hydrochloride. Chemistry 2010; 16:12221-8. [DOI: 10.1002/chem.201001460] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Furmaniak S, Terzyk AP, Rychlicki G, Wiśniewski M, Gauden PA, Kowalczyk P, Werengowska KM, Dulska K. The system of carbon tetrachloride and closed carbon nanotubes analyzed by a combination of molecular simulations, analytical modeling, and adsorption calorimetry. J Colloid Interface Sci 2010; 349:321-30. [PMID: 20576274 DOI: 10.1016/j.jcis.2010.05.055] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2010] [Revised: 05/13/2010] [Accepted: 05/14/2010] [Indexed: 11/30/2022]
Abstract
Using the combined techniques of molecular simulation, simple analytical modeling, and adsorption calorimetry, we propose new models describing adsorption onto closed carbon nanotubes. The models are capable of describing the adsorption isotherms and calorimetric enthalpy of carbon tetrachloride adsorption measured on three different closed carbon nanotubes. It is shown that the assumption of the presence of two types of surface centers (high- and low-energy centers) on external tube surfaces is sufficient to describe experimental adsorption and calorimetric enthalpy data.
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Affiliation(s)
- Sylwester Furmaniak
- N. Copernicus University, Department of Chemistry, Physicochemistry of Carbon Materials Research Group, Gagarin St. 7, 87-100 Toruń, Poland
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Albesa AG, Fertitta EA, Vicente JL. Comparative study of methane adsorption on single-walled carbon nanotubes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:786-795. [PMID: 19899786 DOI: 10.1021/la902192a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We present the combined results of ab initio and molecular mechanical calculations, computer simulations, and adsorption isotherms investigations of CH(4) adsorbed on HiPco single-walled carbon nanotubes. Isotherms and adsorption energies obtained in our model and simulations are in good agreement with ours and others experimental results. The theoretical analysis conducted for various homogeneous bundles of close-ended and open-ended tubes confirm not only the adsorption in at least two different stages but also the role played by each of the different adsorption sites on the nanotube bundles. The study of different site and nanotube sizes allows us to establish the presence of open tubes in the as-produced HiPco bundles, without regarding the role that adsorption in large interstitial channels may play. Our results also show that predicted scenarios, for the mechanism and the preferential adsorption sites depend on the size of the nanotubes and those of the bundles.
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Affiliation(s)
- Alberto G Albesa
- Instituto de Investigaciones Fisicoquimicas Teoricas y Aplicadas, Departamento de Quimica, Facultad de Ciencias Exactas, UNLP, CC 16, Suc. 4 (1900) La Plata, Argentina
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Rawat DS, Migone AD, Riccardo JL, Ramirez-Pastor AJ, Romá FJ. Surface area measurements with linear adsorbates: an experimental comparison of different theoretical approaches. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:9227-9231. [PMID: 19441827 DOI: 10.1021/la9008009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The specific area of a substrate was determined from the results of adsorption isotherms performed with a sequence of four alkanes, from methane to butane, using three different approaches. The data were first analyzed using the BET equation and the point B methods; these results were compared with those obtained using a new equation designed for examining the case of multisite occupancy. The new model specifically accounts for sites that are left uncovered in the case of adsorption by linear adsorbates. Of these three, only the last method gives essentially the same value for the specific surface area of the substrate when different adsorbates are used to measure it. The other two, more traditional, approaches give values of the specific surface area that decrease as the length of the adsorbate used increases.
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Affiliation(s)
- D S Rawat
- Department of Physics, Southern Illinois University, Carbondale Illinois 62901, USA
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Furmaniak S, Terzyk AP, Gauden PA, Wesołowski RP, Kowalczyk P. Ar, CCl(4) and C(6)H(6) adsorption outside and inside of the bundles of multi-walled carbon nanotubes-simulation study. Phys Chem Chem Phys 2009; 11:4982-95. [PMID: 19562128 DOI: 10.1039/b821633a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This is the first paper reporting the results of systematic study of the adsorption of Ar, C(6)H(6) and CCl(4) on the bundles of closed and opened multi-walled carbon nanotubes. Using grand canonical Monte Carlo (GCMC) and molecular dynamics (MD) simulations, we also study the effect of the introducing defects in the external and internal walls of osculating and separated nanotubes on Ar diffusion and on adsorption of all three adsorbates. The Ar diffusion coefficients obtained are very sensitive to the presence of defects. Simulated isotherms are discussed to show the relation between the shapes of the high resolution alpha(s)-plots and the mechanisms of adsorption. From obtained data, as well as from geometric considerations, from the VEGA ZZ package, and from simulations (ASA), the values of surface areas of all nanotubes are calculated and compared with those obtained using the most popular adsorption methods (BET, alpha(s) and the A,B,C-points). We show that the adsorption value for the C-point of the isotherm should be taken for the calculation of the specific surface area of carbon nanotubes to obtain a value which approaches the absolute geometric surface area. A fully packed monolayer is not created at the A-, B- or C-points of the isotherm; however, the number of molecules adsorbed at the latter point is closest to the number of molecules in the monolayer as calculated via the ASA method, the VEGA ZZ package or from geometric considerations.
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