1
|
Grunenberg L, Keßler C, Teh TW, Schuldt R, Heck F, Kästner J, Groß J, Hansen N, Lotsch BV. Probing Self-Diffusion of Guest Molecules in a Covalent Organic Framework: Simulation and Experiment. ACS NANO 2024. [PMID: 38860455 DOI: 10.1021/acsnano.3c12167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2024]
Abstract
Covalent organic frameworks (COFs) are a class of porous materials whose sorption properties have so far been studied primarily by physisorption. Quantifying the self-diffusion of guest molecules inside their nanometer-sized pores allows for a better understanding of confinement effects or transport limitations and is thus essential for various applications ranging from molecular separation to catalysis. Using a combination of pulsed field gradient nuclear magnetic resonance measurements and molecular dynamics simulations, we have studied the self-diffusion of acetonitrile and chloroform in the 1D pore channels of two imine-linked COFs (PI-3-COF) with different levels of crystallinity and porosity. The higher crystallinity and porosity sample exhibited anisotropic diffusion for MeCN parallel to the pore direction, with a diffusion coefficient of Dpar = 6.1(3) × 10-10 m2 s-1 at 300 K, indicating 1D transport and a 7.4-fold reduction in self-diffusion compared to the bulk liquid. This finding aligns with molecular dynamics simulations predicting 5.4-fold reduction, assuming an offset-stacked COF layer arrangement. In the low-porosity sample, more frequent diffusion barriers result in isotropic, yet significantly reduced diffusivities (DB = 1.4(1) × 10-11 m2 s-1). Diffusion coefficients for chloroform at 300 K in the pores of the high- (Dpar = 1.1(2) × 10-10 m2 s-1) and low-porosity (DB = 4.5(1) × 10-12 m2 s-1) samples reproduce these trends. Our multimodal study thus highlights the significant influence of real structure effects such as stacking faults and grain boundaries on the long-range diffusivity of molecular guest species while suggesting efficient intracrystalline transport at short diffusion times.
Collapse
Affiliation(s)
- Lars Grunenberg
- Max Planck Institute for Solid State Research, Heisenbergstr. 1, Stuttgart 70569, Germany
- Department of Chemistry, Ludwig-Maximilians-Universität (LMU), Butenandtstr. 5-13, Munich 81377, Germany
| | - Christopher Keßler
- Institute of Thermodynamics and Thermal Process Engineering, University of Stuttgart, Pfaffenwaldring 9, Stuttgart 70569, Germany
| | - Tiong Wei Teh
- Institute of Thermodynamics and Thermal Process Engineering, University of Stuttgart, Pfaffenwaldring 9, Stuttgart 70569, Germany
| | - Robin Schuldt
- Institute for Theoretical Chemistry, University of Stuttgart, Pfaffenwaldring 55, Stuttgart 70569, Germany
| | - Fabian Heck
- Max Planck Institute for Solid State Research, Heisenbergstr. 1, Stuttgart 70569, Germany
- Department of Chemistry, Ludwig-Maximilians-Universität (LMU), Butenandtstr. 5-13, Munich 81377, Germany
| | - Johannes Kästner
- Institute for Theoretical Chemistry, University of Stuttgart, Pfaffenwaldring 55, Stuttgart 70569, Germany
| | - Joachim Groß
- Institute of Thermodynamics and Thermal Process Engineering, University of Stuttgart, Pfaffenwaldring 9, Stuttgart 70569, Germany
| | - Niels Hansen
- Institute of Thermodynamics and Thermal Process Engineering, University of Stuttgart, Pfaffenwaldring 9, Stuttgart 70569, Germany
| | - Bettina V Lotsch
- Max Planck Institute for Solid State Research, Heisenbergstr. 1, Stuttgart 70569, Germany
- Department of Chemistry, Ludwig-Maximilians-Universität (LMU), Butenandtstr. 5-13, Munich 81377, Germany
- E-conversion, Lichtenbergstrasse 4a, Garching 85748, Germany
| |
Collapse
|
2
|
Maklakov A, Dvoyashkin N, Khozina E. Features of Self-Diffusion of Tridecane Molecules in a Porous Medium of Kaolinite Used as a Model of a Chemically Inert Membrane. MEMBRANES 2023; 13:221. [PMID: 36837723 PMCID: PMC9966625 DOI: 10.3390/membranes13020221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 01/22/2023] [Accepted: 02/07/2023] [Indexed: 06/18/2023]
Abstract
The present work focused on the experimental study of the specific features of self-diffusion of tridecane molecules in macroporous kaolinite, which is used as a raw material for the production of chemically inert membranes. The measurements of self-diffusion coefficients by pulsed magnetic field gradient nuclear magnetic resonance (PMFG NMR) revealed an increased translational mobility of tridecane molecules in kaolinite with incomplete filling of the pore space. This effect was accompanied by a sharp change in the slope of the Arrhenius plot of the self-diffusion coefficients of tridecane molecules in kaolinite. An analysis of the diffusion spin echo decay in the tridecane-kaolinite system revealed a discrepancy between the experimental data and the theoretical predictions, considering the effect of the geometry of porous space on molecular mobility. It was shown that the experimental results could be interpreted in terms of a model of two phases of tridecane molecules in the pores of kaolinite, in the gaseous and adsorbed state, coexisting under the fast-exchange conditions. Within the framework of the model, the activation energies of self-diffusion were calculated, which agreed satisfactorily with the experimental data. Additionally, the effects of the internal magnetic field gradients arising in a porous medium loaded with a gas or liquid on the data of the PFG NMR measurements were calculated. It was shown that the effect of magnetic field inhomogeneities on the measured self-diffusion coefficients of tridecane in kaolinite is small and could be neglected.
Collapse
Affiliation(s)
| | | | - Elena Khozina
- A.N. Frumkin Institute of Physical Chemistry and Electrochemistry of Russian Academy of Science, 119071 Moscow, Russia
| |
Collapse
|
3
|
Sun MH, Gao SS, Hu ZY, Barakat T, Liu Z, Yu S, Lyu JM, Li Y, Xu ST, Chen LH, Su BL. Boosting molecular diffusion following the generalized Murray's Law by constructing hierarchical zeolites for maximized catalytic activity. Natl Sci Rev 2022; 9:nwac236. [PMID: 36632521 PMCID: PMC9828477 DOI: 10.1093/nsr/nwac236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 09/22/2022] [Accepted: 10/03/2022] [Indexed: 01/14/2023] Open
Abstract
Diffusion is an extremely critical step in zeolite catalysis that determines the catalytic performance, in particular for the conversion of bulky molecules. Introducing interconnected mesopores and macropores into a single microporous zeolite with the rationalized pore size at each level is an effective strategy to suppress the diffusion limitations, but remains highly challenging due to the lack of rational design principles. Herein, we demonstrate the first example of boosting molecular diffusion by constructing hierarchical Murray zeolites with a highly ordered and fully interconnected macro-meso-microporous structure on the basis of the generalized Murray's Law. Such a hierarchical Murray zeolite with a refined quantitative relationship between the pore size at each length scale exhibited 9 and 5 times higher effective diffusion rates, leading to 2.5 and 1.5 times higher catalytic performance in the bulky 1,3,5-triisopropylbenzene cracking reaction than those of microporous ZSM-5 and ZSM-5 nanocrystals, respectively. The concept of hierarchical Murray zeolites with optimized structural features and their design principles could be applied to other catalytic reactions for maximized performance.
Collapse
Affiliation(s)
| | | | - Zhi-Yi Hu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China,Nanostructure Research Centre, Wuhan University of Technology, Wuhan 430070, China
| | - Tarek Barakat
- Laboratory of Inorganic Materials Chemistry (CMI), University of Namur, Namur B-5000, Belgium
| | - Zhan Liu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
| | - Shen Yu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
| | - Jia-Min Lyu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
| | - Yu Li
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
| | - Shu-Tao Xu
- National Engineering Laboratory for Methanol to Olefins, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | | | | |
Collapse
|
4
|
Schneider D, Hwang S, Haase J, Miersemann E, Kärger J. Quantitating Diffusion Enhancement in Pore Hierarchies. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:11565-11572. [PMID: 36107750 DOI: 10.1021/acs.langmuir.2c01157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
A microporous continuum traversed by a set of mutually perpendicular channels is considered to be a model for a hierarchically porous system of the mesoporous zeolite type. Transient profiles of molecular uptake as determined by kinetic Monte Carlo (kMC) simulation are found to be in excellent agreement with the result attained by the application of the two-region model (the Kärger model) of molecular diffusion. In particular, it is found that, in the two limiting cases referred to as fast exchange and slow exchange, there exist two simple analytical expressions for the rate of molecular uptake and hence for the quantification of transport enhancement in comparison with the purely microporous adsorbent. In the general case, transport enhancement is simply recognized by the reciprocal addition of the expressions in the two limiting cases.
Collapse
Affiliation(s)
- D Schneider
- Innovation Center Computer Assisted Surgery (ICCAS), Institute at the Medical Faculty, Leipzig University, Semmelweisstraße 14, 04103 Leipzig, Germany
| | - S Hwang
- Faculty of Physics and Earth Sciences, Leipzig University, Linnéstrasse 5, 04103 Leipzig, Germany
| | - J Haase
- Faculty of Physics and Earth Sciences, Leipzig University, Linnéstrasse 5, 04103 Leipzig, Germany
- Saxon Academy of Sciences and Humanities in Leipzig, Structural Commission "Propagation in Nature, Technology and Society" 04107 Leipzig, Karl-Tauchnitz-Straße 1, Germany
| | - E Miersemann
- Saxon Academy of Sciences and Humanities in Leipzig, Structural Commission "Propagation in Nature, Technology and Society" 04107 Leipzig, Karl-Tauchnitz-Straße 1, Germany
- Faculty of Mathematics and Informatics, Leipzig University, Augustusplatz 10, 04109 Leipzig, Germany
| | - J Kärger
- Faculty of Physics and Earth Sciences, Leipzig University, Linnéstrasse 5, 04103 Leipzig, Germany
- Saxon Academy of Sciences and Humanities in Leipzig, Structural Commission "Propagation in Nature, Technology and Society" 04107 Leipzig, Karl-Tauchnitz-Straße 1, Germany
| |
Collapse
|
5
|
Poffe E, Kaper H, Ehrhardt B, Gigli L, Aubert D, Nodari L, Gross S, Mascotto S. Understanding Oxygen Release from Nanoporous Perovskite Oxides and Its Effect on the Catalytic Oxidation of CH 4 and CO. ACS APPLIED MATERIALS & INTERFACES 2021; 13:25483-25492. [PMID: 34006105 DOI: 10.1021/acsami.1c02281] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The design of nanoporous perovskite oxides is considered an efficient strategy to develop performing, sustainable catalysts for the conversion of methane. The dependency of nanoporosity on the oxygen defect chemistry and the catalytic activity of perovskite oxides toward CH4 and CO oxidation was studied here. A novel colloidal synthesis route for nanoporous, high-temperature stable SrTi0.65Fe0.35O3-δ with specific surface areas (SSA) ranging from 45 to 80 m2/g and pore sizes from 10 to 100 nm was developed. High-temperature investigations by in situ synchrotron X-ray diffraction (XRD) and TG-MS combined with H2-TPR and Mössbauer spectroscopy showed that the porosity improved the release of surface oxygen and the oxygen diffusion, whereas the release of lattice oxygen depended more on the state of the iron species and strain effects in the materials. Regarding catalysis, light-off tests showed that low-temperature CO oxidation significantly benefitted from the enhancement of the SSA, whereas high-temperature CH4 oxidation is influenced more by the dioxygen release. During isothermal long-term catalysis tests, however, the continuous oxygen release from large SSA materials promoted both CO and CH4 conversion. Hence, if SSA maximization turned out to efficiently improve low-temperature and long-term catalysis applications, the role of both reducible metal center concentration and crystal structure cannot be completely ignored, as they also contribute to the perovskite oxygen release properties.
Collapse
Affiliation(s)
- Elisa Poffe
- Institut für Anorganische und Angewandte Chemie, Universität Hamburg, Martin-Luther-King-Platz, 6, 20146 Hamburg, Germany
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, via Marzolo 1, 35131 Padova, Italy
| | - Helena Kaper
- Ceramic Synthesis and Functionalization Laboratory, CNRS/Saint-Gobain CREE, Saint-Gobain Research Provence, 550, Ave Alphonse Jauffret, 84306 Cavaillon, France
| | - Benedikt Ehrhardt
- Institut für Anorganische und Angewandte Chemie, Universität Hamburg, Martin-Luther-King-Platz, 6, 20146 Hamburg, Germany
| | - Lara Gigli
- Elettra-Sincrotrone Trieste S.C.p.A., Strada Statale 14, 34149 Basovizza, Trieste, Italy
| | - Daniel Aubert
- Ceramic Synthesis and Functionalization Laboratory, CNRS/Saint-Gobain CREE, Saint-Gobain Research Provence, 550, Ave Alphonse Jauffret, 84306 Cavaillon, France
| | - Luca Nodari
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, via Marzolo 1, 35131 Padova, Italy
- Istituto di Chimica della Materia Condensata e di Tecnologie per l'Energia, ICMATE-CNR, C.so Stati Uniti 4, 35127 Padova, Italy
| | - Silvia Gross
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, via Marzolo 1, 35131 Padova, Italy
- Centro Levi Cases, Università degli Studi di Padova, via Marzolo 9, 35131 Padova, Italy
| | - Simone Mascotto
- Institut für Anorganische und Angewandte Chemie, Universität Hamburg, Martin-Luther-King-Platz, 6, 20146 Hamburg, Germany
| |
Collapse
|
6
|
Affiliation(s)
- Jörg Kärger
- Universität Leipzig Fakultät für Physik und Geowissenschaften Linnéstraße 5 04103 Leipzig Germany
| |
Collapse
|
7
|
Enninful HRNB, Schneider D, Enke D, Valiullin R. Impact of Geometrical Disorder on Phase Equilibria of Fluids and Solids Confined in Mesoporous Materials. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:3521-3537. [PMID: 33724041 DOI: 10.1021/acs.langmuir.0c03047] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Porous solids used in practical applications often possess structural disorder over broad length scales. This disorder strongly affects different properties of the substances confined in their pore spaces. Quantifying structural disorder and correlating it with the physical properties of confined matter is thus a necessary step toward the rational use of porous solids in practical applications and process optimization. The present work focuses on recent advances made in the understanding of correlations between the phase state and geometric disorder in nanoporous solids. We overview the recently developed statistical theory for phase transitions in a minimalistic model of disordered pore networks: linear chains of pores with statistical disorder. By correlating its predictions with various experimental observations, we show that this model gives notable insight into collective phenomena in phase-transition processes in disordered materials and is capable of explaining self-consistently the majority of the experimental results obtained for gas-liquid and solid-liquid equilibria in mesoporous solids. The potentials of the theory for improving the gas sorption and thermoporometry characterization of porous materials are discussed.
Collapse
Affiliation(s)
- Henry R N B Enninful
- Felix Bloch Institute for Solid State Physics, Leipzig University, Linnéstr. 5, 04103 Leipzig, Germany
| | - Daniel Schneider
- Felix Bloch Institute for Solid State Physics, Leipzig University, Linnéstr. 5, 04103 Leipzig, Germany
| | - Dirk Enke
- Institute of Chemical Technology, Leipzig University, Linnéstr. 3, 04103 Leipzig, Germany
| | - Rustem Valiullin
- Felix Bloch Institute for Solid State Physics, Leipzig University, Linnéstr. 5, 04103 Leipzig, Germany
| |
Collapse
|
8
|
Abstract
AbstractLabeling in diffusion measurements by pulsed field gradient (PFG) NMR is based on the observation of the phase of nuclear spins acquired in a constant magnetic field with purposefully superimposed field gradients. This labeling does in no way affect microdynamics and provides information about the probability distribution of molecular displacements as a function of time. An introduction of the measuring principle is followed by a detailed description of the ranges of measurements and their limitation. Particular emphasis is given to an explanation of possible pitfalls in the measurements and the ways to circumvent them. Showcases presented for illustrating the wealth of information provided by PFG NMR include a survey on the various patterns of concentration dependence of intra-particle diffusion and examples of transport inhibition by additional transport resistances within the nanoporous particles and on their external surface. The latter information is attained by combination with the outcome of tracer exchange experiments, which are shown to become possible via a special formalism of PFG NMR data analysis. Further evidence provided by PFG NMR concerns diffusion enhancement in pore hierarchies, diffusion anisotropy and the impact of diffusion on chemical conversion in porous catalysts. A compilation of the specifics of PFG NMR and of the parallels with other measurement techniques concludes the paper.
Collapse
|
9
|
Chen H, Snurr RQ. Understanding the Loading Dependence of Adsorbate Diffusivities in Hierarchical Metal-Organic Frameworks. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:1372-1378. [PMID: 31957450 DOI: 10.1021/acs.langmuir.9b03802] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Using atomistic simulations, we studied the diffusion of n-hexane in a series of isoreticular hierarchical metal-organic frameworks (MOFs) NU-100x. Nonmonotonic diffusivity-loading relationships that depend on the pore sizes were observed, which can be explained by the spatial distribution of adsorbates at different loadings. For one of the MOFs in the series, NU-1000-M, the diffusivity-loading relationship is almost identical to the previously reported results of n-hexane diffusion in the hierarchical self-pillared pentasil (SPP) zeolite. Detailed analysis revealed that the similarity results from their similar micropore and window sizes, which was confirmed by free-energy mapping. The effects of temperature and adsorbate chain length on the diffusion were also studied, which supported our conclusion that the diffusivity in hierarchical nanoporous materials is primarily controlled by the sizes of the micropores and the connecting windows, particularly at relatively low loadings.
Collapse
Affiliation(s)
- Haoyuan Chen
- Department of Chemical & Biological Engineering , Northwestern University , Evanston , Illinois 60208 , United States
| | - Randall Q Snurr
- Department of Chemical & Biological Engineering , Northwestern University , Evanston , Illinois 60208 , United States
| |
Collapse
|
10
|
Hammond-Pereira E, Bryant K, Graham TR, Yang C, Mergelsberg S, Wu D, Saunders SR. Mesoporous silica-encapsulated gold core–shell nanoparticles for active solvent-free benzyl alcohol oxidation. REACT CHEM ENG 2020. [DOI: 10.1039/d0re00198h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Silica-encapsulated gold core@shell nanoparticles (Au@SiO2 CSNPs) were synthesized via a tunable bottom-up procedure to catalyze the aerobic oxidation of benzyl alcohol.
Collapse
Affiliation(s)
- Ellis Hammond-Pereira
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering
- Washington State University
- Pullman
- USA
| | - Kristin Bryant
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering
- Washington State University
- Pullman
- USA
| | - Trent R. Graham
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering
- Washington State University
- Pullman
- USA
- Pacific Northwest National Laboratory
| | - Chen Yang
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering
- Washington State University
- Pullman
- USA
- Alexandra Navrotsky Institute for Experimental Thermodynamics
| | | | - Di Wu
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering
- Washington State University
- Pullman
- USA
- Alexandra Navrotsky Institute for Experimental Thermodynamics
| | - Steven R. Saunders
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering
- Washington State University
- Pullman
- USA
- Department of Chemistry
| |
Collapse
|
11
|
Illa MP, Khandelwal M, Sharma CS. Modulated Dehydration for Enhanced Anodic Performance of Bacterial Cellulose derived Carbon Nanofibers. ChemistrySelect 2019. [DOI: 10.1002/slct.201901359] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Mani Pujitha Illa
- Department of Materials Science and Metallurgical EngineeringIndian Institute of Technology, Hyderabad, Kandi- 502285 Telangana India
- Creative & Advanced Research Based On Nanomaterial (CARBON) LaboratoryDepartment of Chemical EngineeringIndian Institute of Technology, Hyderabad, Kandi- 502285 Telangana India
| | - Mudrika Khandelwal
- Department of Materials Science and Metallurgical EngineeringIndian Institute of Technology, Hyderabad, Kandi- 502285 Telangana India
| | - Chandra S. Sharma
- Creative & Advanced Research Based On Nanomaterial (CARBON) LaboratoryDepartment of Chemical EngineeringIndian Institute of Technology, Hyderabad, Kandi- 502285 Telangana India
| |
Collapse
|
12
|
Hwang S, Kärger J. NMR diffusometry with guest molecules in nanoporous materials. Magn Reson Imaging 2019; 56:3-13. [DOI: 10.1016/j.mri.2018.08.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Revised: 08/20/2018] [Accepted: 08/23/2018] [Indexed: 01/22/2023]
|
13
|
Zheng H, Zhai D, Zhao L, Zhang C, Yu S, Gao J, Xu C. Insight into the Contribution of Isolated Mesopore on Diffusion in Hierarchical Zeolites: The Effect of Temperature. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b00515] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Huimin Zheng
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum (Beijing), 18 Fuxue Road, Beijing 102249, P. R. China
- Faculty of Chemistry and Material Science, Langfang Teachers College, 100 Aiminxi Road, Langfang 065000, Hebei Province P. R. China
| | - Dong Zhai
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum (Beijing), 18 Fuxue Road, Beijing 102249, P. R. China
- Department of Physics and International Centre for Quantum and Molecular Structures, Shanghai University, 99 Shangda Road, Shanghai 200444, P. R. China
| | - Liang Zhao
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum (Beijing), 18 Fuxue Road, Beijing 102249, P. R. China
| | - Chenggen Zhang
- Faculty of Chemistry and Material Science, Langfang Teachers College, 100 Aiminxi Road, Langfang 065000, Hebei Province P. R. China
| | - Suyuan Yu
- Faculty of Chemistry and Material Science, Langfang Teachers College, 100 Aiminxi Road, Langfang 065000, Hebei Province P. R. China
| | - Jinsen Gao
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum (Beijing), 18 Fuxue Road, Beijing 102249, P. R. China
| | - Chunming Xu
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum (Beijing), 18 Fuxue Road, Beijing 102249, P. R. China
| |
Collapse
|
14
|
Dvoyashkin M, Wilde N, Haase J, Gläser R. Diffusion of methyl oleate in hierarchical micro-/mesoporous TS-1-based catalysts probed by PFG NMR spectroscopy. RSC Adv 2018; 8:38941-38944. [PMID: 35558297 PMCID: PMC9090670 DOI: 10.1039/c8ra07434h] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Revised: 11/30/2018] [Accepted: 11/07/2018] [Indexed: 11/23/2022] Open
Abstract
Pulsed field gradient (PFG) NMR is successfully applied to trace the diffusion of methyl oleate (MO) inside the mesopores of hierarchically structured titanium silicalite-1 (TS-1)-based catalysts. Introduction of mesoporosity by post-synthetic treatment of initially microporous TS-1 provides additional active surface to improve catalytic activity in the epoxidation of MO. The present study provides experimental evidence of the accessibility of mesopores for MO resulting from alkaline treatment of TS-1. The self-diffusion coefficients of MO inside the pores of hierarchically structured TS-1 catalysts are up to two orders of magnitude lower compared to the values in the bulk liquid phase. Additionally, the methodological capability of PFG NMR for measuring self-diffusion coefficients of long-chain hydrocarbons (up to C19) confined to narrow mesopores of catalytically active is demonstrated for the first time. Direct assessment of methyl oleate diffusion confined to nanopores of TS-1-based catalysts by means of pulsed field gradient NMR.![]()
Collapse
Affiliation(s)
- Muslim Dvoyashkin
- Institute of Chemical Technology
- Universität Leipzig
- 04103 Leipzig
- Germany
| | - Nicole Wilde
- Institute of Chemical Technology
- Universität Leipzig
- 04103 Leipzig
- Germany
| | - Jürgen Haase
- Felix-Bloch-Institut
- Universität Leipzig
- 04103 Leipzig
- Germany
| | - Roger Gläser
- Institute of Chemical Technology
- Universität Leipzig
- 04103 Leipzig
- Germany
| |
Collapse
|
15
|
Kulasinski K. Free Energy Landscape of Cellulose as a Driving Factor in the Mobility of Adsorbed Water. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:5362-5370. [PMID: 28510442 DOI: 10.1021/acs.langmuir.7b00914] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The diffusion coefficient of water adsorbed in hydrophilic porous materials, such as noncrystalline cellulose, depends on water activity. Faster diffusion at higher water concentrations is observed in experimental and modeling studies. In this paper, two asymptotic water concentrations, near-vacuum and fully saturated, are investigated at the surface of crystalline cellulose with molecular dynamics simulations. An increasing water concentration leads to significant changes in the free energy landscape due to perturbation of local electrostatic potential. Smoothening of strong energy minima, corresponding to sorption sites, and formation of layered structure facilitates water transport in the vicinity of cellulose. The determined transition probabilities and hydrogen bond stability reflect the changes in the energy landscape. As a result of a concentration increase, the emerging basins of attraction and spreading out of those existing in the diluted state lead to an increase in water entropy. Thermal fluctuations of cellulose are demonstrated to rearrange the landscape in the diluted limit, increase adsorbed water entropy, and decrease the water-cellulose H-bond lifetime.
Collapse
Affiliation(s)
- Karol Kulasinski
- Department of Geochemistry, Earth and Environmental Sciences Area, Lawrence Berkeley National Laboratory , Berkeley, California, 94720, United States
| |
Collapse
|
16
|
Le Bozec G, Giraudet S, Le Polles L, Le Cloirec P. 1H NMR Investigations of Activated Carbon Loaded with Volatile Organic Compounds: Quantification, Mechanisms, and Diffusivity Determination. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:1605-1613. [PMID: 28112943 DOI: 10.1021/acs.langmuir.6b03608] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Three volatile organic compounds (VOCs), benzene, cyclohexane, and dichloromethane, were adsorbed onto activated carbon fiber cloth. 1H (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 (DS) were estimated at ≈4.10-12 m2·s-1 for cyclohexane, ≈1.10-11 m2·s-1 for benzene, and ≈4.10-11 m2·s-1 for dichloromethane).
Collapse
Affiliation(s)
- Guirec Le Bozec
- Ecole Nationale Supérieure de Chimie de Rennes, CNRS, UMR 6226, 11 allée de Beaulieu, CS 50837 35708 Rennes Cedex 07, France
| | - Sylvain Giraudet
- Ecole Nationale Supérieure de Chimie de Rennes, CNRS, UMR 6226, 11 allée de Beaulieu, CS 50837 35708 Rennes Cedex 07, France
| | - Laurent Le Polles
- Ecole Nationale Supérieure de Chimie de Rennes, CNRS, UMR 6226, 11 allée de Beaulieu, CS 50837 35708 Rennes Cedex 07, France
| | - Pierre Le Cloirec
- Ecole Nationale Supérieure de Chimie de Rennes, CNRS, UMR 6226, 11 allée de Beaulieu, CS 50837 35708 Rennes Cedex 07, France
| |
Collapse
|
17
|
Marszewska J, Jaroniec M. Tailoring porosity in carbon spheres for fast carbon dioxide adsorption. J Colloid Interface Sci 2017; 487:162-174. [DOI: 10.1016/j.jcis.2016.10.033] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2016] [Revised: 10/13/2016] [Accepted: 10/14/2016] [Indexed: 10/20/2022]
|
18
|
Wee LH, Meledina M, Turner S, Van Tendeloo G, Zhang K, Rodriguez-Albelo LM, Masala A, Bordiga S, Jiang J, Navarro JAR, Kirschhock CEA, Martens JA. 1D-2D-3D Transformation Synthesis of Hierarchical Metal–Organic Framework Adsorbent for Multicomponent Alkane Separation. J Am Chem Soc 2017; 139:819-828. [DOI: 10.1021/jacs.6b10768] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lik H. Wee
- Centre
for Surface Chemistry and Catalysis, University of Leuven, Celestijnenlaan
200f, B3001 Heverlee,
Leuven, Belgium
| | - Maria Meledina
- Electron
Microscopy for Materials Science, University of Antwerp, Groenenborgerlaan
171, B2020 Antwerp, Belgium
| | - Stuart Turner
- Electron
Microscopy for Materials Science, University of Antwerp, Groenenborgerlaan
171, B2020 Antwerp, Belgium
| | - Gustaaf Van Tendeloo
- Electron
Microscopy for Materials Science, University of Antwerp, Groenenborgerlaan
171, B2020 Antwerp, Belgium
| | - Kang Zhang
- Department
of Chemical and Biomolecular Engineering, National University of Singapore, 117576 Singapore
| | | | - Alessio Masala
- Department
of Chemistry, NIS and INSTM Centre of Reference, University of Turin, Via Quarello 15, I-10135 Torino, Italy
| | - Silvia Bordiga
- Department
of Chemistry, NIS and INSTM Centre of Reference, University of Turin, Via Quarello 15, I-10135 Torino, Italy
| | - Jianwen Jiang
- Department
of Chemical and Biomolecular Engineering, National University of Singapore, 117576 Singapore
| | - Jorge A. R. Navarro
- Departamento
de Química Inorgánica, Universidad de Granada, Av. Fuentenueva
S/N, 18071 Granada, Spain
| | - Christine E. A. Kirschhock
- Centre
for Surface Chemistry and Catalysis, University of Leuven, Celestijnenlaan
200f, B3001 Heverlee,
Leuven, Belgium
| | - Johan A. Martens
- Centre
for Surface Chemistry and Catalysis, University of Leuven, Celestijnenlaan
200f, B3001 Heverlee,
Leuven, Belgium
| |
Collapse
|
19
|
Roosen-Runge F, Bicout DJ, Barrat JL. Analytical correlation functions for motion through diffusivity landscapes. J Chem Phys 2016; 144:204109. [DOI: 10.1063/1.4950889] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
20
|
Chemmi H, Petit D, Levitz P, Denoyel R, Galarneau A, Korb JP. Noninvasive Experimental Evidence of the Linear Pore Size Dependence of Water Diffusion in Nanoconfinement. J Phys Chem Lett 2016; 7:393-398. [PMID: 26751162 DOI: 10.1021/acs.jpclett.5b02718] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We show that nuclear magnetic relaxation experiments at variable magnetic fields (NMRD) provide noninvasive means for probing the spatial dependence of liquid diffusion close to solid interfaces. These experiments performed on samples of cylindrical and spherical nanopore geometries demonstrate that the average diffusion coefficient parallel to the interface is proportional to the pore radii in different dynamics regimes. A master curve method allows extraction of gradients of diffusion coefficients in proximity of the pore surfaces, indicative of the efficiency of coupling between liquid layers. Due to their selectivity in frequency, NMRD experiments are able to differentiate the different water dynamical events induced by heterogeneous surfaces or composed dynamical processes. This analysis relevant in physical and biological confinements highlights the interplay between the molecular and continuous description of fluid dynamics near interfaces.
Collapse
Affiliation(s)
- Houria Chemmi
- Physique de la Matière Condensée, Ecole Polytechnique-CNRS , Palaiseau 91128, France
| | - Dominique Petit
- Physique de la Matière Condensée, Ecole Polytechnique-CNRS , Palaiseau 91128, France
| | - Pierre Levitz
- Physicochimie des Electrolytes et Nanosystèmes Interfaciaux, CNRS-UMR 8234, Université Pierre et Marie Curie , 4 place Jussieu, 72522 Paris Cedex 5, France
| | - Renaud Denoyel
- MADIREL, Aix-Marseille Université, CNRS-UMR 7246 , Centre de St Jérôme, 13397 Marseille Cedex 20, France
| | - Anne Galarneau
- Institut Charles Gerhardt Montpellier, UMR 5253 CNRS-UM-ENSCM, ENSCM , 8 rue de l'Ecole Normale, 34296, Montpellier Cedex 05, France
| | - Jean-Pierre Korb
- Physique de la Matière Condensée, Ecole Polytechnique-CNRS , Palaiseau 91128, France
| |
Collapse
|
21
|
Abstract
This review presents the state-of-the-art of multiscale adsorption and transport in hierarchical porous materials.
Collapse
Affiliation(s)
- Benoit Coasne
- Université Grenoble Alpes
- LIPHY
- F-38000 Grenoble
- France
- CNRS
| |
Collapse
|
22
|
Kärger J, Ruthven DM. Diffusion in nanoporous materials: fundamental principles, insights and challenges. NEW J CHEM 2016. [DOI: 10.1039/c5nj02836a] [Citation(s) in RCA: 124] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The increasing complexity of nanoporous catalysts and adsorbents presents a challenge to both the experimental measurement and theoretical modeling of transport behavior.
Collapse
Affiliation(s)
- Jörg Kärger
- Faculty of Physics and Earth Sciences
- University of Leipzig
- 04103 Leipzig
- Germany
| | - Douglas M. Ruthven
- Department of Chemical and Biological Engineering
- University of Maine
- Orono
- USA
| |
Collapse
|
23
|
Schneider D, Mehlhorn D, Zeigermann P, Kärger J, Valiullin R. Transport properties of hierarchical micro–mesoporous materials. Chem Soc Rev 2016; 45:3439-67. [DOI: 10.1039/c5cs00715a] [Citation(s) in RCA: 167] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
This work provides an overview of different experimental techniques of diffusion measurements in porous materials and discusses transport properties of several classes of hierarchically organized micro-mesoporous materials.
Collapse
Affiliation(s)
- Daniel Schneider
- Faculty of Physics and Earth Sciences
- University of Leipzig
- Leipzig
- Germany
| | - Dirk Mehlhorn
- Faculty of Physics and Earth Sciences
- University of Leipzig
- Leipzig
- Germany
| | - Philipp Zeigermann
- Faculty of Physics and Earth Sciences
- University of Leipzig
- Leipzig
- Germany
| | - Jörg Kärger
- Faculty of Physics and Earth Sciences
- University of Leipzig
- Leipzig
- Germany
| | - Rustem Valiullin
- Faculty of Physics and Earth Sciences
- University of Leipzig
- Leipzig
- Germany
| |
Collapse
|
24
|
|
25
|
Kulasinski K, Guyer R, Derome D, Carmeliet J. Water diffusion in amorphous hydrophilic systems: a stop and go process. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:10843-10849. [PMID: 26390260 DOI: 10.1021/acs.langmuir.5b03122] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The diffusion of H2O in three amorphous polymer-H2O systems is studied as a function of H2O content using molecular dynamics. A picture of H2O molecule motion comprising alternating steps of being bound at an adsorption site ("stop") and moving ("go") emerges. This picture is made quantitative. The bound time, frequency of stop-go steps, and tortuosity all decrease with H2O content. Fourier analysis of particle motion during bound time segments provides a measure of an attempt frequency that is connected quantitatively to the bound time and an activation energy of a hydrogen bond. For increasing H2O content, the polymer-H2O systems swell, leading to an increase in the diffusion coefficient and porosity and a decrease in activation energy.
Collapse
Affiliation(s)
- Karol Kulasinski
- Chair of Building Physics, Swiss Federal University of Technology ETH Zurich , Stefano-Franscini-Platz 5, 8093 Zürich, Switzerland
- Laboratory for Multiscale Studies in Building Physics, Swiss Federal Laboratories for Materials Science and Technology Empa , Überlandstrasse 129, 8600 Dübendorf, Switzerland
| | - Robert Guyer
- Solid Earth Geophysics Group, Los Alamos National Laboratory , MS D446, Los Alamos, New Mexico 87545, United States
- Department of Physics, University of Nevada , Reno, Nevada 89557, United States
| | - Dominique Derome
- Laboratory for Multiscale Studies in Building Physics, Swiss Federal Laboratories for Materials Science and Technology Empa , Überlandstrasse 129, 8600 Dübendorf, Switzerland
| | - Jan Carmeliet
- Chair of Building Physics, Swiss Federal University of Technology ETH Zurich , Stefano-Franscini-Platz 5, 8093 Zürich, Switzerland
- Laboratory for Multiscale Studies in Building Physics, Swiss Federal Laboratories for Materials Science and Technology Empa , Überlandstrasse 129, 8600 Dübendorf, Switzerland
| |
Collapse
|
26
|
|
27
|
Mehlhorn D, Inayat A, Schwieger W, Valiullin R, Kärger J. Probing Mass Transfer in Mesoporous Faujasite-Type Zeolite Nanosheet Assemblies. Chemphyschem 2014; 15:1681-6. [DOI: 10.1002/cphc.201301133] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2013] [Indexed: 11/10/2022]
|
28
|
Bonhomme C, Gervais C, Laurencin D. Recent NMR developments applied to organic-inorganic materials. PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY 2014; 77:1-48. [PMID: 24411829 DOI: 10.1016/j.pnmrs.2013.10.001] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2013] [Accepted: 10/17/2013] [Indexed: 06/03/2023]
Abstract
In this contribution, the latest developments in solid state NMR are presented in the field of organic-inorganic (O/I) materials (or hybrid materials). Such materials involve mineral and organic (including polymeric and biological) components, and can exhibit complex O/I interfaces. Hybrids are currently a major topic of research in nanoscience, and solid state NMR is obviously a pertinent spectroscopic tool of investigation. Its versatility allows the detailed description of the structure and texture of such complex materials. The article is divided in two main parts: in the first one, recent NMR methodological/instrumental developments are presented in connection with hybrid materials. In the second part, an exhaustive overview of the major classes of O/I materials and their NMR characterization is presented.
Collapse
Affiliation(s)
- Christian Bonhomme
- Laboratoire de Chimie de la Matière Condensée de Paris, UMR CNRS 7574, Université Pierre et Marie Curie, Paris 06, Collège de France, 11 Place Marcelin Berthelot, 75231 Paris Cedex 05, France.
| | - Christel Gervais
- Laboratoire de Chimie de la Matière Condensée de Paris, UMR CNRS 7574, Université Pierre et Marie Curie, Paris 06, Collège de France, 11 Place Marcelin Berthelot, 75231 Paris Cedex 05, France
| | - Danielle Laurencin
- Institut Charles Gerhardt de Montpellier, UMR5253, CNRS UM2 UM1 ENSCM, CC1701, Place Eugène Bataillon, 34095 Montpellier Cedex 05, France
| |
Collapse
|
29
|
Lee AF, Bennett JA, Manayil JC, Wilson K. Heterogeneous catalysis for sustainable biodiesel productionviaesterification and transesterification. Chem Soc Rev 2014; 43:7887-916. [DOI: 10.1039/c4cs00189c] [Citation(s) in RCA: 516] [Impact Index Per Article: 51.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Low temperature catalytic conversion of triglycerides and fatty acids sourced from renewable feedstocks represents a key enabling technology for the sustainable production of biodiesel through energy efficient, intensified processes.
Collapse
Affiliation(s)
- Adam F. Lee
- European Bioenergy Research Institute
- Aston University
- Birmingham B4 7ET, UK
| | - James A. Bennett
- European Bioenergy Research Institute
- Aston University
- Birmingham B4 7ET, UK
| | - Jinesh C. Manayil
- European Bioenergy Research Institute
- Aston University
- Birmingham B4 7ET, UK
| | - Karen Wilson
- European Bioenergy Research Institute
- Aston University
- Birmingham B4 7ET, UK
| |
Collapse
|
30
|
Shakhov A, Reichenbach C, Kondrashova D, Zeigermann P, Mehlhorn D, Enke D, Valiullin R. Exploring Internal Structure of Nanoporous Glasses Obtained by Leaching of Phase-Separated Alkali Borosilicate Glasses. CHEM-ING-TECH 2013. [DOI: 10.1002/cite.201300088] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
31
|
von der Lehr M, Weidmann C, Mascotto S, Smarsly BM. Hierarchically Ordered Monolithic Silica with Bimodal Porosity Obtained by Hydrolysis and Condensation of 1,4-Bis(trimethoxysilyl)arenes. CHEM-ING-TECH 2013. [DOI: 10.1002/cite.201300079] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
32
|
Bonilla MR, Titze T, Schmidt F, Mehlhorn D, Chmelik C, Valiullin R, Bhatia SK, Kaskel S, Ryoo R, Kärger J. Diffusion Study by IR Micro-Imaging of Molecular Uptake and Release on Mesoporous Zeolites of Structure Type CHA and LTA. MATERIALS 2013; 6:2662-2688. [PMID: 28811401 PMCID: PMC5521224 DOI: 10.3390/ma6072662] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/02/2013] [Revised: 06/12/2013] [Accepted: 06/17/2013] [Indexed: 01/12/2023]
Abstract
The presence of mesopores in the interior of microporous particles may significantly improve their transport properties. Complementing previous macroscopic transient sorption experiments and pulsed field gradient NMR self-diffusion studies with such materials, the present study is dedicated to an in-depth study of molecular uptake and release on the individual particles of mesoporous zeolitic specimens, notably with samples of the narrow-pore structure types, CHA and LTA. The investigations are focused on determining the time constants and functional dependences of uptake and release. They include a systematic variation of the architecture of the mesopores and of the guest molecules under study as well as a comparison of transient uptake with blocked and un-blocked mesopores. In addition to accelerating intracrystalline mass transfer, transport enhancement by mesopores is found to be, possibly, also caused by a reduction of transport resistances on the particle surfaces.
Collapse
Affiliation(s)
- Mauricio Rincon Bonilla
- Faculty of Physics and Earth Science, University of Leipzig, Linnéstr. 5, D-04103 Leipzig, Germany.
- School of Chemical Engineering, University of Queensland, Brisbane QLD 4072, Australia.
| | - Tobias Titze
- Faculty of Physics and Earth Science, University of Leipzig, Linnéstr. 5, D-04103 Leipzig, Germany.
| | - Franz Schmidt
- Department of Inorganic Chemistry, Dresden University of Technology, Bergstrasse 66, 01069 Dresden, Germany.
| | - Dirk Mehlhorn
- Faculty of Physics and Earth Science, University of Leipzig, Linnéstr. 5, D-04103 Leipzig, Germany.
| | - Christian Chmelik
- Faculty of Physics and Earth Science, University of Leipzig, Linnéstr. 5, D-04103 Leipzig, Germany.
| | - Rustem Valiullin
- Faculty of Physics and Earth Science, University of Leipzig, Linnéstr. 5, D-04103 Leipzig, Germany.
| | - Suresh K Bhatia
- School of Chemical Engineering, University of Queensland, Brisbane QLD 4072, Australia.
| | - Stefan Kaskel
- Department of Inorganic Chemistry, Dresden University of Technology, Bergstrasse 66, 01069 Dresden, Germany.
| | - Ryong Ryoo
- Center for Nanomaterials and Chemical Reactions, Institute for Basic Science (IBS), Daejeon 305-701, Korea.
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Korea.
| | - Jörg Kärger
- Faculty of Physics and Earth Science, University of Leipzig, Linnéstr. 5, D-04103 Leipzig, Germany.
| |
Collapse
|
33
|
Kärger J, Valiullin R. Mass transfer in mesoporous materials: the benefit of microscopic diffusion measurement. Chem Soc Rev 2013; 42:4172-97. [DOI: 10.1039/c3cs35326e] [Citation(s) in RCA: 193] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
|
34
|
Peterson GR, Cychosz KA, Thommes M, Hope-Weeks LJ. Solvent-tuned hierarchical porosity in nitrocellulose aerogels. Chem Commun (Camb) 2012; 48:11754-6. [DOI: 10.1039/c2cc36071c] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|