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Ezenwa S, Gounder R. Advances and challenges in designing active site environments in zeolites for Brønsted acid catalysis. Chem Commun (Camb) 2024. [PMID: 39344420 DOI: 10.1039/d4cc04728a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/01/2024]
Abstract
Zeolites contain proton active sites in diverse void environments that stabilize the reactive intermediates and transition states formed in converting hydrocarbons and oxygenates to chemicals and energy carriers. The catalytic diversity that exists among active sites in voids of varying sizes and shapes, even within a given zeolite topology, has motivated research efforts to position and quantify active sites within distinct voids (synthesis-structure) and to link active site environment to catalytic behavior (structure-reactivity). This Feature Article describes advances and challenges in controlling the position of framework Al centers and associated protons within distinct voids during zeolite synthesis or post-synthetic modification, in identifying and quantifying distinct active site environments using characterization techniques, and in determining the influence of active site environments on catalysis. During zeolite synthesis, organic structure directing agents (SDAs) influence Al substitution at distinct lattice positions via intermolecular interactions (e.g., electrostatics, hydrogen bonding) that depend on the size, structure, and charge distribution of organic SDAs and their mobility when confined within zeolitic voids. Complementary post-synthetic strategies to alter intrapore active site distributions include the selective removal of protons by differently-sized titrants or unreactive organic residues and the selective exchange of framework heteroatoms of different reactivities, but remain limited to certain zeolite frameworks. The ability to identify and quantify active sites within distinct intrapore environments depends on the resolution with which a given characterization technique can distinguish Al T-site positions or proton environments in a given zeolite framework. For proton sites in external unconfined environments, various (post-)synthetic strategies exist to control their amounts, with quantitative methods to distinguish them from internal sites that largely depend on using stoichiometric or catalytic probes that only interact with external sites. Protons in different environments influence reactivity by preferentially stabilizing larger transition states over smaller precursor states and influence selectivity by preferentially stabilizing or destabilizing competing transition states of varying sizes that share a common precursor state. We highlight opportunities to address challenges encountered in the design of active site environments in zeolites by closely integrating precise (post-)synthetic methods, validated characterization techniques, well-defined kinetic probes, and properly calibrated theoretical models. Further advances in understanding the molecular details that underlie synthesis-structure-reactivity relationships for active site environments in zeolite catalysis can accelerate the predictive design of tailored zeolites for desired catalytic transformations.
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Affiliation(s)
- Sopuruchukwu Ezenwa
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN, 47907, USA.
| | - Rajamani Gounder
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN, 47907, USA.
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2
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Mallette AJ, Shilpa K, Rimer JD. The Current Understanding of Mechanistic Pathways in Zeolite Crystallization. Chem Rev 2024; 124:3416-3493. [PMID: 38484327 DOI: 10.1021/acs.chemrev.3c00801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2024]
Abstract
Zeolite catalysts and adsorbents have been an integral part of many commercial processes and are projected to play a significant role in emerging technologies to address the changing energy and environmental landscapes. The ability to rationally design zeolites with tailored properties relies on a fundamental understanding of crystallization pathways to strategically manipulate processes of nucleation and growth. The complexity of zeolite growth media engenders a diversity of crystallization mechanisms that can manifest at different synthesis stages. In this review, we discuss the current understanding of classical and nonclassical pathways associated with the formation of (alumino)silicate zeolites. We begin with a brief overview of zeolite history and seminal advancements, followed by a comprehensive discussion of different classes of zeolite precursors with respect to their methods of assembly and physicochemical properties. The following two sections provide detailed discussions of nucleation and growth pathways wherein we emphasize general trends and highlight specific observations for select zeolite framework types. We then close with conclusions and future outlook to summarize key hypotheses, current knowledge gaps, and potential opportunities to guide zeolite synthesis toward a more exact science.
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Affiliation(s)
- Adam J Mallette
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204, United States
| | - Kumari Shilpa
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204, United States
| | - Jeffrey D Rimer
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204, United States
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3
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Mallette AJ, Espindola G, Varghese N, Rimer JD. Highly efficient synthesis of zeolite chabazite using cooperative hydration-mismatched inorganic structure-directing agents. Chem Sci 2024; 15:573-583. [PMID: 38179517 PMCID: PMC10763616 DOI: 10.1039/d3sc05625b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2023] [Accepted: 11/26/2023] [Indexed: 01/06/2024] Open
Abstract
Chabazite (CHA type) zeolite is notoriously difficult to synthesize in the absence of organic structure-directing agents owing to long synthesis times and/or impurity formation. The ability to tailor organic-free syntheses of zeolites is additionally challenging due to the lack of molecular level understanding of zeolite nucleation and growth pathways, particularly the role of inorganic cations. In this study, we reveal that zeolite CHA can be synthesized using six different combinations of inorganic cations, including the first reported seed- and organic-free synthesis without the presence of potassium. We show that lithium, when present in small quantities, is an effective accelerant of CHA crystallization; and that ion pairings can markedly reduce synthesis times and temperatures, while expanding the design space of zeolite CHA formation in comparison to conventional methods utilizing potassium as the sole structure-directing agent. Herein, we posit the effects of cation pairings on zeolite CHA crystallization are related to their hydrated ionic radii. We also emphasize the broader implications for considering the solvated structure and cooperative role of inorganic cations in zeolite synthesis within the context of the reported findings for chabazite.
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Affiliation(s)
- Adam J Mallette
- Department of Chemical and Biomolecular Engineering, University of Houston 4226 Martin Luther King Boulevard Houston TX 77204 USA
| | - Gabriel Espindola
- Department of Chemical and Biomolecular Engineering, University of Houston 4226 Martin Luther King Boulevard Houston TX 77204 USA
| | - Nathan Varghese
- Department of Chemical and Biomolecular Engineering, University of Houston 4226 Martin Luther King Boulevard Houston TX 77204 USA
| | - Jeffrey D Rimer
- Department of Chemical and Biomolecular Engineering, University of Houston 4226 Martin Luther King Boulevard Houston TX 77204 USA
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4
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Bernardo‐Maestro B, Li J, Pérez‐Pariente J, López‐Arbeloa F, Gómez‐Hortigüela L. Driving the Active Site Incorporation in Zeolitic Materials via the Organic Structure-Directing Agent Through Development of H-Bonds with Hydroxyl Groups. Chemistry 2022; 28:e202200702. [PMID: 35510690 PMCID: PMC9400953 DOI: 10.1002/chem.202200702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Indexed: 12/02/2022]
Abstract
(1S,2S)-N-methyl-pseudoephedrine (MPS) was used as organic structure-directing agent (OSDA) for the synthesis of Mg-doped nanoporous aluminophosphates. This molecule displays a particular conformational behavior, where the presence of H-bond donor and acceptor groups provide a rigid conformational space with one asymmetric conformation preferentially occurring. MPS drives the crystallization of Mg-containing AFI materials. Characterization of these materials shows that the OSDA incorporate as protonated species, arranged as head-to-tail monomers. Combination of three-dimensional electron diffraction with high-resolution synchrotron powder X-ray diffraction allowed to locate both the Mg and the organic species. Interestingly, results showed that the spatial incorporation of Mg is driven by the hydroxyl groups of the organic cation through the development of H-bonds with negatively-charged MgO4 tetrahedra. This work demonstrates that H-bond forming groups can be used to drive the spatial incorporation of low-valent dopants within zeolitic frameworks, a highly desired aim in order to control their catalytic activity and selectivity.
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Affiliation(s)
- Beatriz Bernardo‐Maestro
- Molecular Sieves GroupInstituto de Catálisis y Petroleoquímica, ICP-CSICC/ Marie Curie 228049. MadridSpain
| | - Jian Li
- Berzelii Center EXSELENT on Porous MaterialsDepartment of Materials and Environmental ChemistryStockholm UniversityStockholm10691Sweden
| | - Joaquín Pérez‐Pariente
- Molecular Sieves GroupInstituto de Catálisis y Petroleoquímica, ICP-CSICC/ Marie Curie 228049. MadridSpain
| | | | - Luis Gómez‐Hortigüela
- Molecular Sieves GroupInstituto de Catálisis y Petroleoquímica, ICP-CSICC/ Marie Curie 228049. MadridSpain
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5
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Bertolazzo AA, Dhabal D, Molinero V. Polymorph Selection in Zeolite Synthesis Occurs after Nucleation. J Phys Chem Lett 2022; 13:977-981. [PMID: 35060725 DOI: 10.1021/acs.jpclett.2c00033] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Zeolites are porous crystals with extensive polymorphism. The hydrothermal synthesis of zeolites is a multistage process involving amorphous precursors that evolve continuously in solubility and local order toward those of the crystal. These results pose several questions: Why does a first-order transition appear as a continuous transformation? At which stage is the polymorph selected? How large are the barriers and critical sizes for zeolite nucleation? Here we address these questions using nucleation theory with experimental data. We find that the nucleation barriers and critical zeolite nuclei are extremely small at temperatures of hydrothermal synthesis, resulting in spinodal-like crystallization that produces a mosaic of tiny zeolitic crystallites that compete to grow inside each glassy precursor nanoparticle. The subnanometer size of the critical nuclei reveals that the selection between zeolite polymorphs occurs after the nucleation stage, during the growth and coarsening of the crystals around the excluded volume of the structure-directing agents.
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Affiliation(s)
- Andressa A Bertolazzo
- Department of Chemistry, The University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112-0850, United States
| | - Debdas Dhabal
- Department of Chemistry, The University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112-0850, United States
| | - Valeria Molinero
- Department of Chemistry, The University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112-0850, United States
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6
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Shang Z, Chen Y, Zhang L, Zhu X, Wang X, Shi C. Constructing single-crystalline hierarchical plate-like ZSM-5 zeolites with short b-axis length in the synthesis for catalyzing MTO reaction. Inorg Chem Front 2022. [DOI: 10.1039/d1qi01598b] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
ZSM-5 zeolite with hierarchical and lamellar structure is highly desired in industrial application. This paper reports an efficient additive, tetramethylguanidine (TMG), modifying crystal growth of the zeolite to this morphology....
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7
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Jain R, Mallette AJ, Rimer JD. Controlling Nucleation Pathways in Zeolite Crystallization: Seeding Conceptual Methodologies for Advanced Materials Design. J Am Chem Soc 2021; 143:21446-21460. [PMID: 34914871 DOI: 10.1021/jacs.1c11014] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A core objective of synthesizing zeolites for widespread applications is to produce materials with properties and corresponding performances that exceed conventional counterparts. This places an impetus on elucidating and controlling processes of crystallization where one of the most critical design criteria is the ability to prepare zeolite crystals with ultrasmall dimensions to mitigate the deleterious effects of mass transport limitations. At the most fundamental level, this requires a comprehensive understanding of nucleation to address this ubiquitous materials gap. This Perspective highlights recent methodologies to alter zeolite nucleation by using seed-assisted protocols and the exploitation of interzeolite transformations to design advanced materials. Introduction of crystalline seeds in complex growth media used to synthesize zeolites can have wide-ranging effects on the physicochemical properties of the final product. Here we discuss the diverse pathways of zeolite nucleation, recent breakthroughs in seed-assisted syntheses of nanosized and hierarchical materials, and shortcomings for developing generalized guidelines to predict synthesis outcomes. We offer a critical analysis of state-of-the-art approaches to tailor zeolite crystallization wherein we conceptualize whether parallels between network theory and zeolite synthesis can be instrumental for translating key findings of individual discoveries across a broader set of zeolite crystal structures and/or synthesis conditions.
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Affiliation(s)
- Rishabh Jain
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204, United States
| | - Adam J Mallette
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204, United States
| | - Jeffrey D Rimer
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204, United States
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8
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Gutiérrez-Sevillano JJ, Martin-Calvo A, Dubbeldam D, Calero S. Modifying the hydrophobic nature of MAF-6. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119422] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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9
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Li R, Elliott WA, Clark RJ, Sutjianto JG, Rioux RM, Palmer JC, Rimer JD. Factors controlling the molecular modification of one-dimensional zeolites. Phys Chem Chem Phys 2021; 23:18610-18617. [PMID: 34612398 DOI: 10.1039/d1cp02619d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Interactions between organic molecules and inorganic materials are ubiquitous in many applications and often play significant roles in directing pathways of crystallization. It is frequently debated whether kinetics or thermodynamics plays a more prominent role in the ability of molecular modifiers to impact crystal nucleation and growth processes. In the case of nanoporous zeolites, approaches in rational design often capitalize on the ability of organics, used as either modifiers or structure-directing agents, to markedly impact the physicochemical properties of zeolites. It has been demonstrated for multiple topologies that modifier-zeolite interactions can alter crystal size and morphology, yet few studies have distinguished the roles of thermodynamics and kinetics. We use a combination of calorimetry and molecular modeling to estimate the binding energies of organics on zeolite surfaces and correlate these results with synthetic trends in crystal morphology. Our findings reveal unexpectedly small energies of interaction for a range of modifiers with two zeolite structures, indicating the effect of organics on zeolite crystal surface free energy is minor and kinetic factors most likely govern growth modification.
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Affiliation(s)
- Rui Li
- Beijing Key Laboratory for Green Catalysis and Separation, Department of Environmental Chemical Engineering, Beijing University of Technology, Beijing 100124, P. R. China
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11
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Liu S, Zhang H, Chen H, Chen Z, Zhang L, Ren J, Wen X, Yang Y, Li YW. Fabrication of a core–shell MFI@TON material and its enhanced catalytic performance for toluene alkylation. Catal Sci Technol 2020. [DOI: 10.1039/c9cy02133g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Core–shell MFI@TON composites were designed and synthesized as a highly shape-selective catalyst for toluene alkylation by passivating the nonselective acid sites and tuning the diffusion behavior.
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Affiliation(s)
- Suyao Liu
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan 030001
- PR China
| | - Huaike Zhang
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan 030001
- PR China
| | - Huimin Chen
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan 030001
- PR China
| | - Zhiqiang Chen
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan 030001
- PR China
| | - Liwei Zhang
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan 030001
- PR China
| | - Jie Ren
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan 030001
- PR China
| | - Xiaodong Wen
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan 030001
- PR China
| | - Yong Yang
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan 030001
- PR China
| | - Yong-Wang Li
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan 030001
- PR China
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12
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García-Hurtado E, Rodríguez-Fernández A, Moliner M, Martínez C. CO 2 hydrogenation using bifunctional catalysts based on K-promoted iron oxide and zeolite: influence of the zeolite structure and crystal size. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00712a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The influence of the zeolite structure and crystal size on bifunctional tandem catalysts combining K-promoted iron oxide (K/Fe3O4) with different zeolites has been studied for the CO2 hydrogenation reaction at 320 °C and 25 bar.
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Affiliation(s)
- Elisa García-Hurtado
- Instituto de Tecnología Química
- Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas
- 46022 València
- Spain
| | - Aída Rodríguez-Fernández
- Instituto de Tecnología Química
- Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas
- 46022 València
- Spain
| | - Manuel Moliner
- Instituto de Tecnología Química
- Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas
- 46022 València
- Spain
| | - Cristina Martínez
- Instituto de Tecnología Química
- Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas
- 46022 València
- Spain
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13
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Kumar M, Berkson ZJ, Clark RJ, Shen Y, Prisco NA, Zheng Q, Zeng Z, Zheng H, McCusker LB, Palmer JC, Chmelka BF, Rimer JD. Crystallization of Mordenite Platelets using Cooperative Organic Structure-Directing Agents. J Am Chem Soc 2019; 141:20155-20165. [DOI: 10.1021/jacs.9b09697] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Manjesh Kumar
- Department of Chemical and Biomolecular Engineering, University of Houston, 4726 Calhoun Road, Houston, Texas 77204, United States
| | - Zachariah J. Berkson
- Department of Chemical Engineering, University of California, Santa Barbara, Santa Barbara, California 93106, United States
| | - R. John Clark
- Department of Chemical and Biomolecular Engineering, University of Houston, 4726 Calhoun Road, Houston, Texas 77204, United States
| | - Yufeng Shen
- Department of Chemical and Biomolecular Engineering, University of Houston, 4726 Calhoun Road, Houston, Texas 77204, United States
| | - Nathan A. Prisco
- Department of Chemical Engineering, University of California, Santa Barbara, Santa Barbara, California 93106, United States
| | - Qi Zheng
- Materials Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, United States
| | - Zhiyuan Zeng
- Materials Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, United States
- Department of Materials Science and Engineering, University of California, Berkeley, California 94720, United States
| | - Haimei Zheng
- Materials Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, United States
- Department of Materials Science and Engineering, University of California, Berkeley, California 94720, United States
| | - Lynne B. McCusker
- Department of Chemical Engineering, University of California, Santa Barbara, Santa Barbara, California 93106, United States
- Department of Materials, ETH Zurich, Vladimir-Prelog-Weg 5, CH-8093 Zurich, Switzerland
| | - Jeremy C. Palmer
- Department of Chemical and Biomolecular Engineering, University of Houston, 4726 Calhoun Road, Houston, Texas 77204, United States
| | - Bradley F. Chmelka
- Department of Chemical Engineering, University of California, Santa Barbara, Santa Barbara, California 93106, United States
| | - Jeffrey D. Rimer
- Department of Chemical and Biomolecular Engineering, University of Houston, 4726 Calhoun Road, Houston, Texas 77204, United States
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14
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Solsona M, Vollenbroek JC, Tregouet CBM, Nieuwelink AE, Olthuis W, van den Berg A, Weckhuysen BM, Odijk M. Microfluidics and catalyst particles. LAB ON A CHIP 2019; 19:3575-3601. [PMID: 31559978 DOI: 10.1039/c9lc00318e] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
In this review article, we discuss the latest advances and future perspectives of microfluidics for micro/nanoscale catalyst particle synthesis and analysis. In the first section, we present an overview of the different methods to synthesize catalysts making use of microfluidics and in the second section, we critically review catalyst particle characterization using microfluidics. The strengths and challenges of these approaches are highlighted with various showcases selected from the recent literature. In the third section, we give our opinion on the future perspectives of the combination of catalytic nanostructures and microfluidics. We anticipate that in the synthesis and analysis of individual catalyst particles, generation of higher throughput and better understanding of transport inside individual porous catalyst particles are some of the most important benefits of microfluidics for catalyst research.
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Affiliation(s)
- M Solsona
- BIOS Lab on a Chip Group, MESA+ Institute for Nanotechnology, University of Twente, Drienerlolaan 5, Enschede, The Netherlands.
| | - J C Vollenbroek
- BIOS Lab on a Chip Group, MESA+ Institute for Nanotechnology, University of Twente, Drienerlolaan 5, Enschede, The Netherlands.
| | - C B M Tregouet
- BIOS Lab on a Chip Group, MESA+ Institute for Nanotechnology, University of Twente, Drienerlolaan 5, Enschede, The Netherlands.
| | - A-E Nieuwelink
- Inorganic Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
| | - W Olthuis
- BIOS Lab on a Chip Group, MESA+ Institute for Nanotechnology, University of Twente, Drienerlolaan 5, Enschede, The Netherlands.
| | - A van den Berg
- BIOS Lab on a Chip Group, MESA+ Institute for Nanotechnology, University of Twente, Drienerlolaan 5, Enschede, The Netherlands.
| | - B M Weckhuysen
- Inorganic Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
| | - M Odijk
- BIOS Lab on a Chip Group, MESA+ Institute for Nanotechnology, University of Twente, Drienerlolaan 5, Enschede, The Netherlands.
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15
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Zhao Y, Ye Z, Zhang H, Zhang Y, Tang Y. Facile Fabrication and Morphology Regulation of Crossed MFI Zeolite with Improved Performance on LDPE Cracking. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b02563] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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16
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Usui T, Liu Z, Igarashi H, Sasaki Y, Shiramata Y, Yamada H, Ohara K, Kusamoto T, Wakihara T. Identifying the Factors Governing the Early-Stage Degradation of Cu-Chabazite Zeolite for NH 3-SCR. ACS OMEGA 2019; 4:3653-3659. [PMID: 31459578 PMCID: PMC6648293 DOI: 10.1021/acsomega.8b03409] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Accepted: 01/24/2019] [Indexed: 06/10/2023]
Abstract
To understand the degradation mechanism of the copper-ion-exchanged SSZ-13 (Cu-SSZ-13) is of high significance for rationally designing a zeolitic catalyst for ammonia-selective catalytic reduction of NO x (NH3-SCR). In this work, we focused on an Al-rich Cu-SSZ-13 and studied its structural degradation under hydrothermal conditions through a set of characterization techniques, including in situ X-ray diffraction (XRD), pair distribution function analysis and transmission electron microscopy-energy dispersive X-ray analysis (TEM-EDX). The results indicated that the chabazite structure tends to contract in the c direction upon hydrothermal treatment and consequently leads to the collapse of the four-membered ring. Such a structure change then results in the movement of isolated Cu2+ species from the face of the double six-membered ring to its center, which damages the structure further. However, the larger rings (6MRs and 8MRs) partially remain during the structure degradation, which possibly explains that some of the isolated Cu2+ species are alive even when the XRD-detectable crystallinity completely loses. The particle-by-particle observations through TEM-EDX analysis suggested that the occurrence of structural degradation differs remarkably from one individual particle to another. In general, particles with smaller size, having a lower Si/Al ratio and a higher Cu/Al ratio, tend to degrade easily. These results offer a thorough understanding of the structural degradation of Cu-SSZ-13 from the microscopic point of view and point out that the uniformity in composition and particle size of the zeolites plays a critical role in the early-stage degradation.
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Affiliation(s)
- Toyohiro Usui
- IBIDEN
Co. Ltd, 1-1, Kitagata, Ibigawa-cho, Ibi-gun, Gifu 501-0695, Japan
| | - Zhendong Liu
- Department
of Chemical System Engineering, The University
of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Hirokazu Igarashi
- IBIDEN
Co. Ltd, 1-1, Kitagata, Ibigawa-cho, Ibi-gun, Gifu 501-0695, Japan
| | - Yukichi Sasaki
- Nanostructures
Research Laboratory, Japan Fine Ceramics
Center, 2-4-1 Mutsuno, Atsuta-ku, Nagoya 456-8587, Japan
| | - Yuji Shiramata
- Application
Laboratory, Rigaku Corporation, 3-9-12, Matsubara-cho, Akishima-shi, Tokyo 196-8666, Japan
| | - Hiroki Yamada
- Department
of Chemical System Engineering, The University
of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
- JASRI/SPring-8, Kouto 1-1-1, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Koji Ohara
- JASRI/SPring-8, Kouto 1-1-1, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Tetsuro Kusamoto
- Department
of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Toru Wakihara
- Department
of Chemical System Engineering, The University
of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
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17
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Gaber S, Gaber D, Ismail I, Alhassan S, Khaleel M. Additive-free synthesis of house-of-card faujasite zeolite by utilizing aluminosilicate gel memory. CrystEngComm 2019. [DOI: 10.1039/c8ce01804a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The gel “memory” effect of aluminosilicate sols was used to tune the mesopore size of hierarchical house-of-card faujasite in the absence of additives, following earlier findings by Khaleel et al. demonstrating the use of pre- and post-nucleation trajectories for the synthesis of high FAU content faujasite nanocrystals.
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Affiliation(s)
- Safa Gaber
- Department of Chemical Engineering
- Khalifa University of Science and Technology
- Abu Dhabi
- United Arab Emirates
| | - Dina Gaber
- Department of Chemical Engineering
- Khalifa University of Science and Technology
- Abu Dhabi
- United Arab Emirates
| | - Issam Ismail
- Department of Chemical Engineering
- Khalifa University of Science and Technology
- Abu Dhabi
- United Arab Emirates
| | - Saeed Alhassan
- Department of Chemical Engineering
- Khalifa University of Science and Technology
- Abu Dhabi
- United Arab Emirates
| | - Maryam Khaleel
- Department of Chemical Engineering
- Khalifa University of Science and Technology
- Abu Dhabi
- United Arab Emirates
- Center for Catalysis and Separations (CeCaS)
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18
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Liu Z, Zhu J, Wakihara T, Okubo T. Ultrafast synthesis of zeolites: breakthrough, progress and perspective. Inorg Chem Front 2019. [DOI: 10.1039/c8qi00939b] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
An ultrafast route was established to synthesize industrially important zeolites in several minutes, which represents a breakthrough in the field of zeolite synthesis.
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Affiliation(s)
- Zhendong Liu
- Department of Chemical System Engineering
- The University of Tokyo
- Tokyo
- Japan
| | - Jie Zhu
- Department of Chemical System Engineering
- The University of Tokyo
- Tokyo
- Japan
| | - Toru Wakihara
- Department of Chemical System Engineering
- The University of Tokyo
- Tokyo
- Japan
| | - Tatsuya Okubo
- Department of Chemical System Engineering
- The University of Tokyo
- Tokyo
- Japan
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19
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Haw KG, Gilson JP, Nesterenko N, Akouche M, El Siblani H, Goupil JM, Rigaud B, Minoux D, Dath JP, Valtchev V. Supported Embryonic Zeolites and their Use to Process Bulky Molecules. ACS Catal 2018. [DOI: 10.1021/acscatal.8b01936] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kok-Giap Haw
- Laboratoire Catalyse et Spectrochimie, Normandie Univ, ENSICAEN, UNICAEN, CNRS, 14000 Caen, France
| | - Jean-Pierre Gilson
- Laboratoire Catalyse et Spectrochimie, Normandie Univ, ENSICAEN, UNICAEN, CNRS, 14000 Caen, France
| | - Nikolai Nesterenko
- Total Research and Technology Feluy, Zone Industrielle C, 7181 Feluy, Belgium
| | - Mariame Akouche
- Laboratoire Catalyse et Spectrochimie, Normandie Univ, ENSICAEN, UNICAEN, CNRS, 14000 Caen, France
| | - Hussein El Siblani
- Laboratoire Catalyse et Spectrochimie, Normandie Univ, ENSICAEN, UNICAEN, CNRS, 14000 Caen, France
| | - Jean-Michel Goupil
- Laboratoire Catalyse et Spectrochimie, Normandie Univ, ENSICAEN, UNICAEN, CNRS, 14000 Caen, France
| | - Baptiste Rigaud
- Laboratoire Catalyse et Spectrochimie, Normandie Univ, ENSICAEN, UNICAEN, CNRS, 14000 Caen, France
| | - Delphine Minoux
- Total Research and Technology Feluy, Zone Industrielle C, 7181 Feluy, Belgium
| | - Jean-Pierre Dath
- Total Research and Technology Feluy, Zone Industrielle C, 7181 Feluy, Belgium
| | - Valentin Valtchev
- Laboratoire Catalyse et Spectrochimie, Normandie Univ, ENSICAEN, UNICAEN, CNRS, 14000 Caen, France
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20
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Abstract
Crystal engineering relies upon the ability to predictively control intermolecular interactions during the assembly of crystalline materials in a manner that leads to a desired (and predetermined) set of properties. Economics, scalability, and ease of design must be leveraged with techniques that manipulate the thermodynamics and kinetics of crystal nucleation and growth. It is often challenging to exact simultaneous control over multiple physicochemical properties, such as crystal size, habit, chirality, polymorph, and composition. Engineered materials often rely upon postsynthesis (top-down) processes to introduce properties that would otherwise be challenging to attain through direct (bottom-up) approaches. We discuss the application of crystal engineering to heterogeneous catalysts with a focus on four general themes: ( a) tailored nanocrystal size, ( b) controlled environments surrounding active sites, ( c) tuned morphology with well-defined facets, and ( d) hierarchical materials with disparate pore size and active site distributions. We focus on nonporous materials, including metals and metal oxides, and two classes of porous materials: zeolites and metal organic frameworks. We review novel synthesis methods involving synergistic experimental and computational design approaches, the challenges facing catalyst development, and opportunities for future advancement in crystal engineering.
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Affiliation(s)
- Jeffrey D Rimer
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204-4004, USA;
| | - Aseem Chawla
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204-4004, USA;
| | - Thuy T Le
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204-4004, USA;
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21
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Otto T, Zones SI, Hong Y, Iglesia E. Synthesis of highly dispersed cobalt oxide clusters encapsulated within LTA zeolites. J Catal 2017. [DOI: 10.1016/j.jcat.2017.10.017] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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22
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Encapsulated Schiff base nickel complex in zeolite Y: Correlation between catalytic activities and extent of distortion supported by experimental and DFT studies. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2017.04.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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23
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Borel M, Dodin M, Daou TJ, Bats N, Patarin J. Formation domain of SDA-free Y faujasite small crystals. NEW J CHEM 2017. [DOI: 10.1039/c7nj02200j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The ternary phase diagram shows that the domain for obtaining Y faujasite small crystals is very narrow.
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Affiliation(s)
- M. Borel
- Université de Strasbourg (UNISTRA)
- Université de Haute Alsace (UHA)
- CNRS
- Axe Matériaux à Porosité Contrôlée (MPC)
- Institut de Science des Matériaux de Mulhouse (IS2M)
| | - M. Dodin
- IFP Energies nouvelles
- Rond-Point de l'échangeur de Solaize
- 69360 Solaize
- France
| | - T. J. Daou
- Université de Strasbourg (UNISTRA)
- Université de Haute Alsace (UHA)
- CNRS
- Axe Matériaux à Porosité Contrôlée (MPC)
- Institut de Science des Matériaux de Mulhouse (IS2M)
| | - N. Bats
- IFP Energies nouvelles
- Rond-Point de l'échangeur de Solaize
- 69360 Solaize
- France
| | - J. Patarin
- Université de Strasbourg (UNISTRA)
- Université de Haute Alsace (UHA)
- CNRS
- Axe Matériaux à Porosité Contrôlée (MPC)
- Institut de Science des Matériaux de Mulhouse (IS2M)
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24
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Zhang L, Chen Y, Jiang JG, Xu L, Guo W, Xu H, Wen XD, Wu P. Facile synthesis of ECNU-20 (IWR) hollow sphere zeolite composed of aggregated nanosheets. Dalton Trans 2017; 46:15641-15645. [DOI: 10.1039/c7dt03420b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A germanosilicate ECNU-20 (IWR) zeolite, with a nanosheets aggregated hollow structure, was synthesized using a commercially available amine as structure-directing agent.
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Affiliation(s)
- Lin Zhang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200062
- P. R. China
| | - Yunlei Chen
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan
- China
| | - Jin-Gang Jiang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200062
- P. R. China
| | - Le Xu
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
- PR China
| | - Wenping Guo
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan
- China
| | - Hao Xu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200062
- P. R. China
| | - Xiao-Dong Wen
- State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan
- China
| | - Peng Wu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200062
- P. R. China
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25
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Koike M, Asakura Y, Sugihara M, Kuroda Y, Tsuzura H, Wada H, Shimojima A, Kuroda K. Topotactic conversion of layered silicate RUB-15 to silica sodalite through interlayer condensation in N-methylformamide. Dalton Trans 2017; 46:10232-10239. [DOI: 10.1039/c7dt01287j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Layered silicate RUB-15 was topotactically converted to silica sodalite through interlayer condensation by refluxing in N-methylformamide.
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Affiliation(s)
- Masakazu Koike
- Department of Applied Chemistry
- Faculty of Science and Engineering
- Waseda University
- Tokyo 169-8555
- Japan
| | - Yusuke Asakura
- Department of Applied Chemistry
- Faculty of Science and Engineering
- Waseda University
- Tokyo 169-8555
- Japan
| | - Megumi Sugihara
- Department of Applied Chemistry
- Faculty of Science and Engineering
- Waseda University
- Tokyo 169-8555
- Japan
| | - Yoshiyuki Kuroda
- Waseda Institute for Advanced Study
- Waseda University
- Tokyo 169-8050
- Japan
| | - Hidehiro Tsuzura
- Department of Applied Chemistry
- Faculty of Science and Engineering
- Waseda University
- Tokyo 169-8555
- Japan
| | - Hiroaki Wada
- Department of Applied Chemistry
- Faculty of Science and Engineering
- Waseda University
- Tokyo 169-8555
- Japan
| | - Atsushi Shimojima
- Department of Applied Chemistry
- Faculty of Science and Engineering
- Waseda University
- Tokyo 169-8555
- Japan
| | - Kazuyuki Kuroda
- Department of Applied Chemistry
- Faculty of Science and Engineering
- Waseda University
- Tokyo 169-8555
- Japan
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26
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Wagia R, Strashnov I, Anderson MW, Attfield MP. Determination of the Preassembled Nucleating Units That Are Critical for the Crystal Growth of the Metal-Organic Framework CdIF-4. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201603687] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Raghidah Wagia
- School of Chemistry; The University of Manchester; Brunswick Street Manchester M13 9PL UK
| | - Ilya Strashnov
- School of Chemistry; The University of Manchester; Brunswick Street Manchester M13 9PL UK
| | - Michael W. Anderson
- School of Chemistry; The University of Manchester; Brunswick Street Manchester M13 9PL UK
| | - Martin P. Attfield
- School of Chemistry; The University of Manchester; Brunswick Street Manchester M13 9PL UK
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27
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Thang HV, Frolich K, Shamzhy M, Eliášová P, Rubeš M, Čejka J, Bulánek R, Nachtigall P. The effect of the zeolite pore size on the Lewis acid strength of extra-framework cations. Phys Chem Chem Phys 2016; 18:18063-73. [PMID: 27326803 DOI: 10.1039/c6cp03343a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The catalytic activity and the adsorption properties of zeolites depend on their topology and composition. For a better understanding of the structure-activity relationship it is advantageous to focus just on one of these parameters. Zeolites synthesized recently by the ADOR protocol offer a new possibility to investigate the effect of the channel diameter on the adsorption and catalytic properties of zeolites: UTL, OKO, and PCR zeolites consist of the same dense 2D layers (IPC-1P) that are connected with different linkers (D4R, S4R, O-atom, respectively) resulting in the channel systems of different sizes (14R × 12R, 12R × 10R, 10R × 8R, respectively). Consequently, extra-framework cation sites compensating charge of framework Al located in these dense 2D layers (channel-wall sites) are the same in all three zeolites. Therefore, the effect of the zeolite channel size on the Lewis properties of the cationic sites can be investigated independent of other factors determining the quality of Lewis sites. UTL, OKO, and PCR and pillared 2D IPC-1PI materials were prepared in Li-form and their properties were studied by a combination of experimental and theoretical methods. Qualitatively different conclusions are drawn for Li(+) located at the channel-wall sites and at the intersection sites (Li(+) located at the intersection of two zeolite channels): the Lewis acid strength of Li(+) at intersection sites is larger than that at channel-wall sites. The Lewis acid strength of Li(+) at channel-wall sites increases with decreasing channel size. When intersecting channels are small (10R × 8R in PCR) the intersection Li(+) sites are no longer stable and Li(+) is preferentially located at the channel-wall sites. Last but not least, the increase in adsorption heats with the decreasing channel size (due to enlarged dispersion contribution) is clearly demonstrated.
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Affiliation(s)
- Ho Viet Thang
- Department of Physical and Macromolecular Chemistry, Faculty of Sciences, Charles University, Hlavova 8, 128 40 Prague 2, Czech Republic.
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28
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Wagia R, Strashnov I, Anderson MW, Attfield MP. Determination of the Preassembled Nucleating Units That Are Critical for the Crystal Growth of the Metal-Organic Framework CdIF-4. Angew Chem Int Ed Engl 2016; 55:9075-9. [PMID: 27276023 DOI: 10.1002/anie.201603687] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Indexed: 11/12/2022]
Abstract
Identifying the form and role of the chemical species that traverse the stages of crystallization is critical to understanding the formation process of coordination polymers. Herein, we report the combined use of in situ atomic force microscopy and mass spectrometry to identify preformed, complex, cadmium 2-ethylimidazole containing solution species in the growth solution of the cadmium 2-ethylimidazolate metal-organic framework CdIF-4, and show that they are critical in the surface nucleation for the crystal growth of this material. Surface nucleation appears to be instigated by these [Cdx (CH3 CO2 )y (C5 H7 N2 /C5 H8 N2 )z ]-containing solution species and not by sole addition of the ligand molecules. The CH3 CO2 (-) or Cd(CH3 CO2 )2 groups of the former are substituted subsequently as the framework growth proceeds. Our greater understanding of such solution species and their role in crystallization will guide future syntheses of designed functional coordination polymers.
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Affiliation(s)
- Raghidah Wagia
- School of Chemistry, The University of Manchester, Brunswick Street, Manchester, M13 9PL, UK
| | - Ilya Strashnov
- School of Chemistry, The University of Manchester, Brunswick Street, Manchester, M13 9PL, UK
| | - Michael W Anderson
- School of Chemistry, The University of Manchester, Brunswick Street, Manchester, M13 9PL, UK
| | - Martin P Attfield
- School of Chemistry, The University of Manchester, Brunswick Street, Manchester, M13 9PL, UK.
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29
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Zhang H, Zhao Y, Zhang H, Wang P, Shi Z, Mao J, Zhang Y, Tang Y. Tailoring Zeolite ZSM-5 Crystal Morphology/Porosity through Flexible Utilization of Silicalite-1 Seeds as Templates: Unusual Crystallization Pathways in a Heterogeneous System. Chemistry 2016; 22:7141-51. [DOI: 10.1002/chem.201600028] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Hongbin Zhang
- Department of Chemistry; Laboratory of Advanced Materials; Collaborative Innovation Center of Chemistry for Energy Materials and; Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials; Fudan University; Shanghai 200433 P. R. China
| | - Yang Zhao
- Department of Chemistry; Laboratory of Advanced Materials; Collaborative Innovation Center of Chemistry for Energy Materials and; Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials; Fudan University; Shanghai 200433 P. R. China
| | - Hongxia Zhang
- Department of Chemistry; Laboratory of Advanced Materials; Collaborative Innovation Center of Chemistry for Energy Materials and; Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials; Fudan University; Shanghai 200433 P. R. China
| | - Peicheng Wang
- Department of Chemistry; Laboratory of Advanced Materials; Collaborative Innovation Center of Chemistry for Energy Materials and; Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials; Fudan University; Shanghai 200433 P. R. China
| | - Zhangping Shi
- Department of Chemistry; Laboratory of Advanced Materials; Collaborative Innovation Center of Chemistry for Energy Materials and; Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials; Fudan University; Shanghai 200433 P. R. China
| | - Jianjiang Mao
- Department of Chemistry; Laboratory of Advanced Materials; Collaborative Innovation Center of Chemistry for Energy Materials and; Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials; Fudan University; Shanghai 200433 P. R. China
| | - Yahong Zhang
- Department of Chemistry; Laboratory of Advanced Materials; Collaborative Innovation Center of Chemistry for Energy Materials and; Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials; Fudan University; Shanghai 200433 P. R. China
| | - Yi Tang
- Department of Chemistry; Laboratory of Advanced Materials; Collaborative Innovation Center of Chemistry for Energy Materials and; Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials; Fudan University; Shanghai 200433 P. R. China
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30
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Zhang H, Zhang H, Wang P, Zhao Y, Shi Z, Zhang Y, Tang Y. Organic template-free synthesis of zeolite mordenite nanocrystals through exotic seed-assisted conversion. RSC Adv 2016. [DOI: 10.1039/c6ra08211d] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
A facile and organic-template-free route of exotic seed-assisted conversion is proposed to synthesize nano-crystallite assembled MOR zeolite with rich mesopores, high crystallinity, perfect framework, and high activity for large molecule cracking.
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Affiliation(s)
- Hongxia Zhang
- Department of Chemistry
- Laboratory of Advanced Materials
- Collaborative Innovation Center of Chemistry for Energy Materials
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials
- Fudan University
| | - Hongbin Zhang
- Department of Chemistry
- Laboratory of Advanced Materials
- Collaborative Innovation Center of Chemistry for Energy Materials
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials
- Fudan University
| | - Peicheng Wang
- Department of Chemistry
- Laboratory of Advanced Materials
- Collaborative Innovation Center of Chemistry for Energy Materials
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials
- Fudan University
| | - Yang Zhao
- Department of Chemistry
- Laboratory of Advanced Materials
- Collaborative Innovation Center of Chemistry for Energy Materials
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials
- Fudan University
| | - Zhangping Shi
- Department of Chemistry
- Laboratory of Advanced Materials
- Collaborative Innovation Center of Chemistry for Energy Materials
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials
- Fudan University
| | - Yahong Zhang
- Department of Chemistry
- Laboratory of Advanced Materials
- Collaborative Innovation Center of Chemistry for Energy Materials
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials
- Fudan University
| | - Yi Tang
- Department of Chemistry
- Laboratory of Advanced Materials
- Collaborative Innovation Center of Chemistry for Energy Materials
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials
- Fudan University
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31
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Palčić A, Abellán FZ, Vicente A, Fernandez C, Georgieva V, Bronić J, Valtchev V. Formation mechanism of three-membered ring containing microporous zincosilicate RUB-17. CrystEngComm 2015. [DOI: 10.1039/c5ce01394a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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32
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van Tendeloo L, Haouas M, Martens JA, Kirschhock CEA, Breynaert E, Taulelle F. Zeolite synthesis in hydrated silicate ionic liquids. Faraday Discuss 2015; 179:437-49. [DOI: 10.1039/c4fd00234b] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Hydrated alkali silicate ionic liquids (HSIL) were prepared by hydrolysis of tetraethoxysilane (TEOS) in alkali hydroxide–water mixtures, inducing coacervation and phase separation. The resulting optically clear, homogenous silicate ionic liquid offers exceptional potential for monitoring zeolite crystallisation. This enhanced synthesis route provides access to analysis of speciation, mechanistic details of zeolite formation, and brings organic-template-free zeolite synthesis by design within reach.
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Affiliation(s)
| | - Mohamed Haouas
- Institut Lavoisier de Versailles
- University of Versailles Saint-Quentin en Yvelines
- 78035 Versailles Cedex
- France
| | - Johan A. Martens
- Centrum voor Oppervlaktechemie en Katalyse
- KU Leuven
- Heverlee
- Belgium
| | | | - Eric Breynaert
- Centrum voor Oppervlaktechemie en Katalyse
- KU Leuven
- Heverlee
- Belgium
| | - Francis Taulelle
- Centrum voor Oppervlaktechemie en Katalyse
- KU Leuven
- Heverlee
- Belgium
- Institut Lavoisier de Versailles
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