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Colombo F, Fantini R, Di Renzo F, Malavasi G, Malferrari D, Arletti R. An insight into REEs recovery from spent fluorescent lamps: Evaluation of the affinity of an NH 4-13X zeolite towards Ce, La, Eu and Y. Waste Manag 2024; 175:339-347. [PMID: 38241823 DOI: 10.1016/j.wasman.2024.01.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 01/10/2024] [Accepted: 01/12/2024] [Indexed: 01/21/2024]
Abstract
The constantly increasing demand of Rare Earth Elements (REEs) made them to be part of the so-called "critical elements" indispensable for the energy transition. The monopoly of only a few countries, the so-called balance problem between demand and natural abundance, and the need to limit the environmental costs of their mining, stress the necessity of a recycling policy of these elements. Different methods have been tested for REEs recovery. Despite the well-known ion-exchange properties of zeolites, just few preliminary works investigated their application for REEs separation and recycle. In this work we present a double ion exchange experiment on a NH4-13X zeolite, aimed at the recovery of different REEs from solutions mimicking the composition of liquors obtained from the leaching of spent fluorescent lamps. The results showed that the zeolite was able to exchange all the REEs tested, but the exchange capacity was different: despite Y being the more concentrated REE in the solutions, the cation exchange was lower than less concentrated ones (16 atoms p.u.c. vs 21 atoms for Ce and La solutions), suggesting a possible selectivity. In order to recover REEs from the zeolite, a second exchange with an ammonium solution was performed. The analyses of the zeolites show that almost all of Ce and Eu remain in the zeolite, while nearly half of La and Y are released. This, once again, suggests a possible selective release of REEs and open the possibility for a recovery process in which Rare Earths can be effectively separated.
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Affiliation(s)
- Francesco Colombo
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Modena e Reggio Emilia, Modena, Italy.
| | - Riccardo Fantini
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Modena e Reggio Emilia, Modena, Italy
| | - Francesco Di Renzo
- ICGM, University of Montpellier, CNRS, ENSCM, Place Eugène Bataillon, 34095 Montpellier, France
| | - Gianluca Malavasi
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Modena e Reggio Emilia, Modena, Italy
| | - Daniele Malferrari
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Modena e Reggio Emilia, Modena, Italy
| | - Rossella Arletti
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Modena e Reggio Emilia, Modena, Italy.
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2
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Awan IZ, Ho PH, Beltrami G, Fraisse B, Cacciaguerra T, Gaudin P, Tanchoux N, Albonetti S, Martucci A, Cavani F, Di Renzo F, Tichit D. Composition Effect on the Formation of Oxide Phases by Thermal Decomposition of CuNiM(III) Layered Double Hydroxides with M(III) = Al, Fe. Materials (Basel) 2023; 17:83. [PMID: 38203936 PMCID: PMC10779612 DOI: 10.3390/ma17010083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 12/17/2023] [Accepted: 12/21/2023] [Indexed: 01/12/2024]
Abstract
The thermal decomposition processes of coprecipitated Cu-Ni-Al and Cu-Ni-Fe hydroxides and the formation of the mixed oxide phases were followed by thermogravimetry and derivative thermogravimetry analysis (TG - DTG) and in situ X-ray diffraction (XRD) in a temperature range from 25 to 800 °C. The as-prepared samples exhibited layered double hydroxide (LDH) with a rhombohedral structure for the Ni-richer Al- and Fe-bearing LDHs and a monoclinic structure for the CuAl LDH. Direct precipitation of CuO was also observed for the Cu-richest Fe-bearing samples. After the collapse of the LDHs, dehydration, dehydroxylation, and decarbonation occurred with an overlapping of these events to an extent, depending on the structure and composition, being more pronounced for the Fe-bearing rhombohedral LDHs and the monoclinic LDH. The Fe-bearing amorphous phases showed higher reactivity than the Al-bearing ones toward the crystallization of the mixed oxide phases. This reactivity was improved as the amount of embedded divalent cations increased. Moreover, the influence of copper was effective at a lower content than that of nickel.
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Affiliation(s)
- Iqra Zubair Awan
- ICGM, University Montpellier, CNRS, ENSCM, 1919 Route de Mende, 34090 Montpellier, France; (I.Z.A.); (P.H.H.); (B.F.); (T.C.); (P.G.); (N.T.); (F.D.R.)
- Department of Industrial Chemistry “Toso Montanari”, Alma Mater Studiorum-Università di Bologna, Viale Risorgimento 4, 40136 Bologna, Italy; (S.A.); (F.C.)
- Department Chemistry, Lahore Garrison University, Lahore 54000, Pakistan
| | - Phuoc Hoang Ho
- ICGM, University Montpellier, CNRS, ENSCM, 1919 Route de Mende, 34090 Montpellier, France; (I.Z.A.); (P.H.H.); (B.F.); (T.C.); (P.G.); (N.T.); (F.D.R.)
- Chemical Engineering, Competence Centre for Catalysis, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden
| | - Giada Beltrami
- Department Physics and Earth Sciences, University of Ferrara, Via Saragat 1, 44100 Ferrara, Italy; (G.B.); (A.M.)
| | - Bernard Fraisse
- ICGM, University Montpellier, CNRS, ENSCM, 1919 Route de Mende, 34090 Montpellier, France; (I.Z.A.); (P.H.H.); (B.F.); (T.C.); (P.G.); (N.T.); (F.D.R.)
| | - Thomas Cacciaguerra
- ICGM, University Montpellier, CNRS, ENSCM, 1919 Route de Mende, 34090 Montpellier, France; (I.Z.A.); (P.H.H.); (B.F.); (T.C.); (P.G.); (N.T.); (F.D.R.)
| | - Pierrick Gaudin
- ICGM, University Montpellier, CNRS, ENSCM, 1919 Route de Mende, 34090 Montpellier, France; (I.Z.A.); (P.H.H.); (B.F.); (T.C.); (P.G.); (N.T.); (F.D.R.)
| | - Nathalie Tanchoux
- ICGM, University Montpellier, CNRS, ENSCM, 1919 Route de Mende, 34090 Montpellier, France; (I.Z.A.); (P.H.H.); (B.F.); (T.C.); (P.G.); (N.T.); (F.D.R.)
| | - Stefania Albonetti
- Department of Industrial Chemistry “Toso Montanari”, Alma Mater Studiorum-Università di Bologna, Viale Risorgimento 4, 40136 Bologna, Italy; (S.A.); (F.C.)
- Center for Chemical Catalysis—C3, Alma Mater Studiorum-Università di Bologna, Viale Risorgimento 4, 40136 Bologna, Italy
| | - Annalisa Martucci
- Department Physics and Earth Sciences, University of Ferrara, Via Saragat 1, 44100 Ferrara, Italy; (G.B.); (A.M.)
| | - Fabrizio Cavani
- Department of Industrial Chemistry “Toso Montanari”, Alma Mater Studiorum-Università di Bologna, Viale Risorgimento 4, 40136 Bologna, Italy; (S.A.); (F.C.)
- Center for Chemical Catalysis—C3, Alma Mater Studiorum-Università di Bologna, Viale Risorgimento 4, 40136 Bologna, Italy
| | - Francesco Di Renzo
- ICGM, University Montpellier, CNRS, ENSCM, 1919 Route de Mende, 34090 Montpellier, France; (I.Z.A.); (P.H.H.); (B.F.); (T.C.); (P.G.); (N.T.); (F.D.R.)
| | - Didier Tichit
- ICGM, University Montpellier, CNRS, ENSCM, 1919 Route de Mende, 34090 Montpellier, France; (I.Z.A.); (P.H.H.); (B.F.); (T.C.); (P.G.); (N.T.); (F.D.R.)
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Vozniuk O, Cacciaguerra T, Tanchoux N, Albonetti S, Stievano L, Millet JMM, Bion N, Di Renzo F, Cavani F. Control of the mechanism of chemical-looping of ethanol in non-stoichiometric ferrites by Cu-Mn substitution. Catal Today 2023. [DOI: 10.1016/j.cattod.2023.114105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
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Awan IZ, Ho PH, Beltrami G, Gimello O, Cacciaguerra T, Gaudin P, Tanchoux N, Albonetti S, Martucci A, Cavani F, Tichit D, Di Renzo F. Design of Multicationic Copper‐Bearing Layered Double Hydroxides for Catalytic Application in Biorefinery. ChemCatChem 2023. [DOI: 10.1002/cctc.202201622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Affiliation(s)
| | - Phuoc Hoang Ho
- Chalmers University of Technology: Chalmers tekniska hogskola AB Competence Center for Catalysis SWEDEN
| | - Giada Beltrami
- Università degli Studi di Ferrara: Universita degli Studi di Ferrara Dipartimento di Fisica e Scienze della Terra ITALY
| | | | | | | | | | - Stefania Albonetti
- Alma Mater Studiorum University of Bologna: Universita di Bologna Dipartimento di Chimica Industriale Toso Montanari ITALY
| | - Annalisa Martucci
- Universita degli Studi di Ferrara Dipartimento di Fisica e Scienze della Terra ITALY
| | - Fabrizio Cavani
- Alma Mater Studiorum Università di Bologna: Universita di Bologna Dipartimento di Chimica Industriale Toso Montanari ITALY
| | | | - Francesco Di Renzo
- CNRS UMR 5253 Institut Charles Gerhardt ENSCM8 Rue Ecole Normale 34296 Montpellier FRANCE
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Confalonieri G, Vezzalini G, Maletti L, Di Renzo F, Gozzoli V, Arletti R. Ion exchange capacity of synthetic zeolite L: a promising way for cerium recovery. Environ Sci Pollut Res Int 2022; 29:65176-65184. [PMID: 35478397 DOI: 10.1007/s11356-022-20429-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Accepted: 04/20/2022] [Indexed: 06/14/2023]
Abstract
The increasing rare earth elements' (REE) demand to meet the market request and the current political scenario show that it is essential to find good solutions to recover these elements from waste (both industrial and mining). Zeolites are microporous materials with high cation exchange capacity, up to now only little investigated for REE recycle. Here, we propose the use of NH4+-exchanged zeolite L for Ce recovery from a very diluted solution (0.002 M), mimicking the Ce3+ concentration of the liquors deriving from the leaching of spent catalysts. The aim of this work is twofold: (i) to investigate the exploitability of zeolite L as cation exchanger in the Ce recovery; and (ii) to determine the best working conditions. The investigated process consists of a coupled cation exchange: (1) in the first exchange the NH4+ cations - present in the zeolite porosities - are exchanged with the Ce3+ ions in the solution; and (2) in the second experiment, the Ce3+ trapped into the zeolite is recovered through a further exchange with NH4. The best working conditions for Ce3+ exchange of NH4-zeolite L are: batch system, liquid/solid ratio equal to 90 mL/g and 180 mL/g, 24 h of contact at 25 °C. The resulting Ce adsorption capacity (qt) is equal to ~25 mg/g and ~39 mg/g and the removal efficiency 100% and 77% for the two tested liquid/solid ratios, respectively. The kinetics was proved to be fast and consistent with industrial timing; no energy cost for temperature setting is required; and the acid pH (~4) of the solutions does not affect the zeolite structure stability and its exchange performance. It has been demonstrated that the zeolite framework is not affected by the exchange so that the same absorbent material can be employed many times.
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Affiliation(s)
- Giorgia Confalonieri
- ID22, Structure of Materials European Synchrotron Radiation Facility 71, Avenue des Martyrs, 384043, Grenoble, France
| | - Giovanna Vezzalini
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Modena e Reggio Emilia, Via Giuseppe Campi, 103, 41125, Modena, Italy
| | - Laura Maletti
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Modena e Reggio Emilia, Via Giuseppe Campi, 103, 41125, Modena, Italy
| | - Francesco Di Renzo
- ICGM, University of Montpellier, CNRS, ENSCM, Centre Balard, 1919 Route de Mende, 34090, Montpellier, France
| | - Vittorio Gozzoli
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Modena e Reggio Emilia, Via Giuseppe Campi, 103, 41125, Modena, Italy
| | - Rossella Arletti
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Modena e Reggio Emilia, Via Giuseppe Campi, 103, 41125, Modena, Italy.
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Ho PH, Świrk K, de Luna GS, Jabłońska M, Ospitali F, Di Renzo F, Delahay G, Fornasari G, Vaccari A, Palkovits R, Benito P. Facile coating of Co3O4 on open-cell metallic foam for N2O catalytic decomposition. Chem Eng Res Des 2022. [DOI: 10.1016/j.cherd.2022.09.046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Aguilera-Segura SM, Dragún D, Gaumard R, Di Renzo F, Ondík IM, Mineva T. Thermal fluctuation and conformational effects on NMR parameters in β-O-4 lignin dimers from QM/MM and machine-learning approaches. Phys Chem Chem Phys 2022; 24:8820-8831. [PMID: 35352736 DOI: 10.1039/d2cp00361a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Advanced solid-state and liquid-state nuclear magnetic resonance (NMR) approaches have enabled high throughput information about functional groups and types of bonding in a variety of lignin fragments from degradation processes and laboratory synthesis. The use of quantum chemical (QM) methods may provide detailed insight into the relationships between NMR parameters and specific lignin conformations and their dynamics, whereas a rapid prediction of NMR properties could be achieved by combining QM with machine-learning (ML) approaches. In this study, we present the effect of conformations of β-O-4 linked lignin guaiacyl dimers on 13C and 1H chemical shifts while considering the thermal fluctuations of the guaiacyl dimers in water, ethanol and acetonitrile, as well as their binary 75 wt% aqueous solutions. Molecular dynamics and QM/MM simulations were used to describe the dynamics of guaiacyl dimers. The isotropic shielding of the majority of the carbon nuclei was found to be less sensitive toward a specific conformation than that of the hydrogen nuclei. The largest 1H downfield shifts of 4-6 ppm were established in the hydroxy groups and the rings in the presence of organic solvent components. The Gradient Boosting Regressor model has been trained on 60% of the chemical environments in the dynamics trajectories with the NMR isotropic shielding (σiso), computed with density-functional theory, for lignin atoms. The high efficiency of this machine-learning model in predicting the remaining 40% σiso(13C) and σiso(1H) values was established.
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Affiliation(s)
| | - Dominik Dragún
- FIIT STU in Bratislava, Ilkovičova 2, 842 16 Bratislava, Slovakia
| | - Robin Gaumard
- ICGM, Univ Montpellier, CNRS, ENSCM, Montpellier, France.
| | | | - Irina Malkin Ondík
- FIIT STU in Bratislava, Ilkovičova 2, 842 16 Bratislava, Slovakia.,MicroStep-MIS spol. s.r.o. Čavojského 1, 84104 Bratislava, Slovakia
| | - Tzonka Mineva
- ICGM, Univ Montpellier, CNRS, ENSCM, Montpellier, France.
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Bachtis D, Aarts G, Di Renzo F, Lucini B. Inverse Renormalization Group in Quantum Field Theory. Phys Rev Lett 2022; 128:081603. [PMID: 35275681 DOI: 10.1103/physrevlett.128.081603] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Accepted: 01/28/2022] [Indexed: 06/14/2023]
Abstract
We propose inverse renormalization group transformations within the context of quantum field theory that produce the appropriate critical fixed point structure, give rise to inverse flows in parameter space, and evade the critical slowing down effect in calculations pertinent to criticality. Given configurations of the two-dimensional ϕ^{4} scalar field theory on sizes as small as V=8^{2}, we apply the inverse transformations to produce rescaled systems of size up to V^{'}=512^{2} which we utilize to extract two critical exponents. We conclude by discussing how the approach is generally applicable to any method that successfully produces configurations from a statistical ensemble and how it can give novel insights into the structure of the renormalization group.
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Affiliation(s)
- Dimitrios Bachtis
- Department of Mathematics, Swansea University, Bay Campus, SA1 8EN, Swansea, Wales, United Kingdom
| | - Gert Aarts
- Department of Physics, Swansea University, Singleton Campus, SA2 8PP, Swansea, Wales, United Kingdom
- European Centre for Theoretical Studies in Nuclear Physics and Related Areas (ECT*) and Fondazione Bruno Kessler Strada delle Tabarelle 286, 38123 Villazzano (TN), Italy
| | - Francesco Di Renzo
- Dipartimento di Scienze Matematiche, Fisiche e Informatiche, Universitá di Parma and INFN, Gruppo Collegato di Parma, I-43100 Parma, Italy
| | - Biagio Lucini
- Department of Mathematics, Swansea University, Bay Campus, SA1 8EN, Swansea, Wales, United Kingdom
- Swansea Academy of Advanced Computing, Swansea University, Bay Campus, SA1 8EN, Swansea, Wales, United Kingdom
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Polisi M, Fabbiani M, Vezzalini G, Di Renzo F, Pastero L, Quartieri S, Arletti R. Amino acid encapsulation in zeolite MOR: Effect of spatial confinement. Phys Chem Chem Phys 2021; 23:20541-20552. [PMID: 34505580 DOI: 10.1039/d1cp02676c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this study the absorption of glycine, α-alanine and β-alanine amino acids into the pores of the synthetic zeolite Na-mordenite was investigated with the aim of: (i) evaluating the effectiveness of the MOR framework type in amino acid adsorption (via vapor and aqueous loading); (ii) understanding the host-guest and guest-guest interactions to possibly design a tailor made material and a loading procedure able to maximize the amino acid adsorption; (iii) studying the effect of pressure on the adsorbed amino acids such as, for instance, possible amino acid condensation. The structural characterization, carried out with the combination of diffractometric and infrared spectroscopy analyses, shows that MOR can adsorb amino acids, which are found both in protonated/deprotonated (possibly also generating zwitterions) form. Vapor loading is ineffective for α-alanine, while it is effective in β-alanine and glycine adsorption, even if using different loading degrees. The shape and size of MOR channels make this zeolite suitable to accommodate a peptide. In a glycine loaded sample some molecules condensate to form cyclic dimers, while linear oligomers are detected only in a β-alanine MOR hybrid. The sample loaded with α-L-alanine from aqueous solution does not show the presence of amide bond signals, indicating that the molecules are mostly hosted in zwitterionic form in Na-MOR channels. The application of external baric stimuli does not induce substantial modifications in the structure of the glycine loaded zeolite; this result may be explained by the low number of molecules hosted in the channels. The amino acid amount within the zeolite pores is the most important reactivity parameter and an increased loading could induce chemical modifications.
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Affiliation(s)
- Michelangelo Polisi
- Department of Chemical and Geological Sciences, University of Modena and Reggio Emilia, 41125 Modena, Italy.
| | - Marco Fabbiani
- Department of Chemistry, University of Torino, 10125 Torino, Italy.,Interdepartmental Centre "Nanostructured Surfaces and Interfaces" - NIS, University of Torino, 10125 Torino, Italy.,ICGM, UMR 5253 Univ Montpellier-CNRS-ENSCM, Montpellier, France
| | - Giovanna Vezzalini
- Department of Chemical and Geological Sciences, University of Modena and Reggio Emilia, 41125 Modena, Italy.
| | | | - Linda Pastero
- Department of Earth Sciences, University of Torino, 10125 Torino, Italy
| | - Simona Quartieri
- Department of Chemical and Geological Sciences, University of Modena and Reggio Emilia, 41125 Modena, Italy.
| | - Rossella Arletti
- Department of Chemical and Geological Sciences, University of Modena and Reggio Emilia, 41125 Modena, Italy.
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Alabarse FG, Polisi M, Fabbiani M, Quartieri S, Arletti R, Joseph B, Capitani F, Contreras S, Konczewicz L, Rouquette J, Alonso B, Di Renzo F, Zambotti G, Baù M, Ferrari M, Ferrari V, Ponzoni A, Santoro M, Haines J. High-Pressure Synthesis and Gas-Sensing Tests of 1-D Polymer/Aluminophosphate Nanocomposites. ACS Appl Mater Interfaces 2021; 13:27237-27244. [PMID: 34081853 DOI: 10.1021/acsami.1c00625] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Recently, filling zeolites with gaseous hydrocarbons at high pressures in diamond anvil cells has been carried out to synthesize novel polymer-guest/zeolite-host nanocomposites with potential, intriguing applications, although the small amount of materials, 10-7 cm3, severely limited true technological exploitation. Here, liquid phenylacetylene, a much more practical reactant, was polymerized in the 12 Å channels of the aluminophosphate Virginia Polytechnic Institute-Five (VFI) at about 0.8 GPa and 140 °C, with large volumes in the order of 0.6 cm3. The resulting polymer/VFI composite was investigated by synchrotron X-ray diffraction and optical and 1H, 13C, and 27Al nuclear magnetic resonance spectroscopy. The materials, consisting of disordered π-conjugated polyphenylacetylene chains in the pores of VFI, were deposited on quartz crystal microbalances and tested as gas sensors. We obtained promising sensing performances to water and butanol vapors, attributed to the finely tuned nanostructure of the composites. High-pressure synthesis is used here to obtain an otherwise unattainable true technological material.
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Affiliation(s)
| | - Michelangelo Polisi
- Dipartimento di Scienze Chimiche e Geologiche, Università di Modena, Modena 41121, Italy
| | - Marco Fabbiani
- Dipartimento di chimica, Università di Torino, Torino 10125, Italy
| | - Simona Quartieri
- Dipartimento di Scienze Chimiche e Geologiche, Università di Modena, Modena 41121, Italy
| | - Rossella Arletti
- Dipartimento di Scienze della Terra, Università di Torino, Torino 10125, taly
| | - Boby Joseph
- Elettra Sincrotrone Trieste, Trieste 34149, Italy
| | | | - Sylvie Contreras
- Laboratoire Charles Coulomb, CNRS, Université de Montpellier, Montpellier 34095, France
| | - Leszek Konczewicz
- Laboratoire Charles Coulomb, CNRS, Université de Montpellier, Montpellier 34095, France
| | - Jerome Rouquette
- ICGM, CNRS, Université de Montpellier, ENSCM, Montpellier 34095, France
| | - Bruno Alonso
- ICGM, CNRS, Université de Montpellier, ENSCM, Montpellier 34095, France
| | | | - Giulia Zambotti
- Istituto Nazionale di Ottica, INO-CNR, and Dipartimento di Ingegneria dell'Informazione, Università degli Studi di Brescia, Brescia 25121, Italy
| | - Marco Baù
- Istituto Nazionale di Ottica, INO-CNR, and Dipartimento di Ingegneria dell'Informazione, Università degli Studi di Brescia, Brescia 25121, Italy
| | - Marco Ferrari
- Istituto Nazionale di Ottica, INO-CNR, and Dipartimento di Ingegneria dell'Informazione, Università degli Studi di Brescia, Brescia 25121, Italy
| | - Vittorio Ferrari
- Istituto Nazionale di Ottica, INO-CNR, and Dipartimento di Ingegneria dell'Informazione, Università degli Studi di Brescia, Brescia 25121, Italy
| | - Andrea Ponzoni
- Istituto Nazionale di Ottica, INO-CNR, and Dipartimento di Ingegneria dell'Informazione, Università degli Studi di Brescia, Brescia 25121, Italy
| | - Mario Santoro
- Istituto Nazionale di Ottica, INO-CNR, and European Laboratory for Non Linear Spectroscopy, LENS, Sesto Fiorentino 50019, Italy
| | - Julien Haines
- ICGM, CNRS, Université de Montpellier, ENSCM, Montpellier 34095, France
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11
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Nguyen KD, Ho PH, Vu PD, Pham TLD, Trens P, Di Renzo F, Phan NTS, Le HV. Efficient Removal of Chromium(VI) Anionic Species and Dye Anions from Water Using MOF-808 Materials Synthesized with the Assistance of Formic Acid. Nanomaterials (Basel) 2021; 11:1398. [PMID: 34070500 PMCID: PMC8226478 DOI: 10.3390/nano11061398] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 05/21/2021] [Accepted: 05/21/2021] [Indexed: 11/22/2022]
Abstract
This study presents a simple approach to prepare MOF-808, an ultra-stable Zr-MOF constructed from 6-connected zirconium clusters and 1,3,5-benzene tricarboxylic acid, with tailored particle sizes. Varying the amount of formic acid as a modulator in the range of 200-500 equivalents results in MOF-808 materials with a crystal size from 40 nm to approximately 1000 nm. Apart from the high specific surface area, a combination of a fraction of mesopore and plenty of acidic centers on the Zr-clusters induces a better interaction with the ionic pollutants such as K2Cr2O7 and anionic dyes. MOF-808 shows uptakes of up to 141.2, 642.0, and 731.0 mg/g for K2Cr2O7, sunset yellow, and quinoline yellow, respectively, in aqueous solutions at ambient conditions. The uptakes for the ionic dyes are significantly higher than those of other MOFs reported from the literature. Moreover, the adsorption capacity of MOF-808 remains stable after four cycles. Our results demonstrate that MOF-808 is a promising ideal platform for removing oxometallates and anionic dyes from water.
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Affiliation(s)
- Khoa D. Nguyen
- Department of Chemical Engineering, Ho Chi Minh University of Technology, 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City 740010, Vietnam; (P.D.V.); (T.L.D.P.); (N.T.S.P.)
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City 740010, Vietnam
| | - Phuoc H. Ho
- Ecole Nationale Supérieure de Chimie de Montpellier, ICGM, Univ. Montpellier, CNRS, ENSCM, 34090 Montpellier, France; (P.H.H.); (F.D.R.)
| | - Phuong D. Vu
- Department of Chemical Engineering, Ho Chi Minh University of Technology, 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City 740010, Vietnam; (P.D.V.); (T.L.D.P.); (N.T.S.P.)
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City 740010, Vietnam
| | - Thuyet L. D. Pham
- Department of Chemical Engineering, Ho Chi Minh University of Technology, 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City 740010, Vietnam; (P.D.V.); (T.L.D.P.); (N.T.S.P.)
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City 740010, Vietnam
| | - Philippe Trens
- Ecole Nationale Supérieure de Chimie de Montpellier, ICGM, Univ. Montpellier, CNRS, ENSCM, 34090 Montpellier, France; (P.H.H.); (F.D.R.)
| | - Francesco Di Renzo
- Ecole Nationale Supérieure de Chimie de Montpellier, ICGM, Univ. Montpellier, CNRS, ENSCM, 34090 Montpellier, France; (P.H.H.); (F.D.R.)
| | - Nam T. S. Phan
- Department of Chemical Engineering, Ho Chi Minh University of Technology, 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City 740010, Vietnam; (P.D.V.); (T.L.D.P.); (N.T.S.P.)
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City 740010, Vietnam
| | - Ha V. Le
- Department of Chemical Engineering, Ho Chi Minh University of Technology, 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City 740010, Vietnam; (P.D.V.); (T.L.D.P.); (N.T.S.P.)
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City 740010, Vietnam
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12
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Abstract
Understanding and controlling the physical adsorption of lignin compounds on cellulose pulp are key parameters in the successful optimization of organosolv processes. The effect of binary organic-aqueous solvents on the coordination of lignin to cellulose was studied with molecular dynamics simulations, considering ethanol and acetonitrile to be organic cosolvents in aqueous solutions in comparison to their monocomponent counterparts. The structures of the solvation shells around cellulose and lignin and the energetics of lignin-cellulose adhesion indicate a more effective disruption of lignin-cellulose binding by binary solvents. The synergic effect between solvent components is explained by their preferential interactions with lignin-cellulose complexes. In the presence of pure water, long-lasting H-bonds in the lignin-cellulose complex are observed, promoted by the nonfavorable interactions of lignin with water. Ethanol and acetonitrile compete with water and lignin for cellulose oxygen binding sites, causing a nonlinear decrease in the lignin-cellulose interactions with the amount of the organic component. This effect is modulated by the water exclusion from the cellulose solvation shell by the organic solvent component. The amount and rate of water exclusion depend on the type of organic cosolvent and its concentration.
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Affiliation(s)
| | | | - Tzonka Mineva
- ICGM, Univ Montpellier, CNRS, ENSCM, Montpellier, France
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13
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Martinovic F, Tran QN, Deorsola FA, Bensaid S, Palkovits R, Paulus W, Bonelli B, Di Renzo F, Pirone R. SO2 deactivation mechanism of NO oxidation and regeneration of the LaCoO3 perovskite. Catal Sci Technol 2020. [DOI: 10.1039/c9cy02478f] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The deactivation mechanism and methods to cope with the poisoning by SO2 of a LaCoO3 perovskite-based NO oxidation catalyst were investigated.
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Affiliation(s)
- Ferenc Martinovic
- Politecnico di Torino
- Department of Applied Science and Technology
- 10129 Torino
- Italy
- Institut für Technische und Makromolekulare Chemie
| | - Quang Nguyen Tran
- Politecnico di Torino
- Department of Applied Science and Technology
- 10129 Torino
- Italy
- Institut Charles Gerhardt
| | | | - Samir Bensaid
- Politecnico di Torino
- Department of Applied Science and Technology
- 10129 Torino
- Italy
| | - Regina Palkovits
- Institut für Technische und Makromolekulare Chemie
- RWTH Aachen University
- 52074 Aachen
- Germany
| | - Werner Paulus
- Institut Charles Gerhardt
- Université de Montpellier-CNRS-ENSCM
- 34095 Montpellier
- France
| | - Barbara Bonelli
- Politecnico di Torino
- Department of Applied Science and Technology
- 10129 Torino
- Italy
| | - Francesco Di Renzo
- Institut Charles Gerhardt
- Université de Montpellier-CNRS-ENSCM
- 34095 Montpellier
- France
| | - Raffaele Pirone
- Politecnico di Torino
- Department of Applied Science and Technology
- 10129 Torino
- Italy
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14
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15
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Vozniuk O, Tanchoux N, Millet JM, Albonetti S, Di Renzo F, Cavani F. Spinel Mixed Oxides for Chemical-Loop Reforming: From Solid State to Potential Application. Studies in Surface Science and Catalysis 2019. [DOI: 10.1016/b978-0-444-64127-4.00014-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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16
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Awan IZ, Tanchoux N, Quignard F, Albonetti S, Cavani F, Di Renzo F. Heterogeneous Catalysis as a Tool for Production of Aromatic Compounds From Lignin. Studies in Surface Science and Catalysis 2019. [DOI: 10.1016/b978-0-444-64127-4.00013-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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17
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Aguilera-Segura SM, Di Renzo F, Mineva T. Structures, intermolecular interactions, and chemical hardness of binary water-organic solvents: a molecular dynamics study. J Mol Model 2018; 24:292. [PMID: 30244346 DOI: 10.1007/s00894-018-3817-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Accepted: 08/30/2018] [Indexed: 10/28/2022]
Abstract
The evolution of structural properties, thermodynamics and averaged (dynamic) total hardness values as a function of the composition of binary water-organic solvents, was rationalized in view of the intermolecular interactions. The organic solvents considered were ethanol, acetonitrile, and isopropanol at 0.25, 0.5, 0.75, and 1 mass fractions, and the results were obtained using molecular dynamics simulations. The site-to-site radial distribution functions reveal a well-defined peak for the first coordination shell in all solvents. A characteristic peak of the second coordination shell exists in aqueous mixtures of acetonitrile, whereas in the water-alcohol solvents, a second peak develops with the increase in alcohol content. From the computed coordination numbers, averaged hydrogen bonds and their lifetimes, we found that water mixed with acetonitrile largely preserves its structural features and promotes the acetonitrile structuring. Both the water and alcohol structures in their mixtures are disturbed and form hydrogen bonds between molecules of different kinds. The dynamic hardness values are obtained as the average over the total hardness values of 1200 snapshots per solvent type, extracted from the equilibrium dynamics. The dynamic hardness profile has a non-linear evolution with the liquid compositions, similarly to the thermodynamic properties of these non-ideal solvents. Graphical abstract Computed dynamic total hardness, as a function of the cosolvent mass fraction for water-ethanol (EtOH), water-isopropanol (2PrOH) and water-acetonitrile (AN).
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Affiliation(s)
- Sonia M Aguilera-Segura
- Matériaux Avancés pour la Catalyse et la Santé, UMR 5253 CNRS/UM/ENSCM, Institut Charles Gerhardt de Montpellier (ICGM), 240, Avenue du Professeur Emile Jeanbrau, 34296, Montpellier cedex 5, France
| | - Francesco Di Renzo
- Matériaux Avancés pour la Catalyse et la Santé, UMR 5253 CNRS/UM/ENSCM, Institut Charles Gerhardt de Montpellier (ICGM), 240, Avenue du Professeur Emile Jeanbrau, 34296, Montpellier cedex 5, France
| | - Tzonka Mineva
- Matériaux Avancés pour la Catalyse et la Santé, UMR 5253 CNRS/UM/ENSCM, Institut Charles Gerhardt de Montpellier (ICGM), 240, Avenue du Professeur Emile Jeanbrau, 34296, Montpellier cedex 5, France.
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18
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Beltrami G, Martucci A, Di Renzo F, Alberti A, de Lourdes Guzman-Castillo M, Fajula F. Cation migrations and Bronsted site formation in NH 4 form of zeolite omega: a combined in situ time-resolved synchrotron and neutron powder diffraction study. Acta Crystallogr A Found Adv 2018. [DOI: 10.1107/s2053273318094469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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19
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Abstract
Simulating thimble regularization of lattice field theory can be tricky when more than one thimble is to be taken into account. A couple of years ago we proposed a solution for this problem. More recently this solution proved to be effective in the case of 0+1 dimensional QCD. A few lessons we can learnt, including the role of symmetries and general hints on algorithmic solutions.
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20
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Debbio LD, Renzo FD, Filaci G. High-order perturbative expansions in massless gauge theories with NSPT. EPJ Web Conf 2018. [DOI: 10.1051/epjconf/201817511023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We investigate the possibility of using numerical stochastic perturbation theory (NSPT) to probe high orders in the perturbative expansion of lattice gauge theories with massless Wilson fermions. Twisted boundary conditions are used to regularise the gauge zero-mode; the extension of these boundary conditions to include fermions in the fundamental representation requires to introduce a smell degree of freedom. Moreover, the mass of Wilson fermions is affected by an additive renormalisation: we study how to determine the mass counterterms consistently in finite volume. The knowledge of the critical masses will enable high-order perturbative computations in massless QCD, e.g. (as a first application) for the plaquette.
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Constant S, Barakat A, Robitzer M, Di Renzo F, Dumas C, Quignard F. Composition, texture and methane potential of cellulosic residues from Lewis acids organosolv pulping of wheat straw. Bioresour Technol 2016; 216:737-743. [PMID: 27295251 DOI: 10.1016/j.biortech.2016.06.019] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2016] [Revised: 06/03/2016] [Accepted: 06/04/2016] [Indexed: 06/06/2023]
Abstract
Cellulosic pulps have been successfully isolated from wheat straw through a Lewis acids organosolv treatment. The use of Lewis acids with different hardness produced pulps with different delignification degrees. The cellulosic residue was characterised by chemical composition, X-ray diffraction, FT-IR spectroscopy, N2 physisorption, scanning electron microscopy and potential for anaerobic digestibility. Surface area and pore volume increased with the hardness of the Lewis acid, in correspondence with the decrease of the amount of lignin and hemicellulose in the pulp. The non linearity of the correlation between porosity and composition suggests that an agglomeration of cellulose fibrils occurs in the early stages of pulping. All organosolv pulps presented a significantly higher methane potential than the parent straw. A methane evolution of 295Ncm(3)/g OM was reached by a moderate improvement of the accessibility of the native straw.
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Affiliation(s)
- Sandra Constant
- ICGM, UMR 5253 CNRS-Université de Montpellier-ENSCM, Matériaux Avancés pour la Catalyse et la Santé, 8 Rue de l'Ecole Normale, 34296 Montpellier Cedex 5, France
| | - Abdellatif Barakat
- INRA, UMR 1208, Ingénierie des Agropolymères et Technologies Emergentes (IATE) 2, Place Pierre Viala, 34060 Montpellier Cedex 1, France
| | - Mike Robitzer
- ICGM, UMR 5253 CNRS-Université de Montpellier-ENSCM, Matériaux Avancés pour la Catalyse et la Santé, 8 Rue de l'Ecole Normale, 34296 Montpellier Cedex 5, France
| | - Francesco Di Renzo
- ICGM, UMR 5253 CNRS-Université de Montpellier-ENSCM, Matériaux Avancés pour la Catalyse et la Santé, 8 Rue de l'Ecole Normale, 34296 Montpellier Cedex 5, France.
| | - Claire Dumas
- INRA, LISBP - INSA de Toulouse, INSA/CNRS 5504 - UMR INSA/INRA 792, 135 avenue de Rangueil, 31077 Toulouse Cedex 04, France
| | - Françoise Quignard
- ICGM, UMR 5253 CNRS-Université de Montpellier-ENSCM, Matériaux Avancés pour la Catalyse et la Santé, 8 Rue de l'Ecole Normale, 34296 Montpellier Cedex 5, France
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22
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Toumi N, Bégu S, Cacciaguerra T, Galarneau A, Azaïs T, Bengueddach A, Renzo FD. Phospholipid–silica mesophases formed in hydroalcoholic solution as precursors of mesoporous silica. NEW J CHEM 2016. [DOI: 10.1039/c5nj03563e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The fusion of lipid bilayers in sponge silica–lecithin composites is favoured by natural cosurfactants-induced local opposite curvatures.
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Affiliation(s)
- Nadia Toumi
- Institut Charles Gerhardt Montpellier-MACS
- UMR 5253 CNRS-UM-ENSCM
- ENSCM
- 34296 Montpellier
- France
| | - Sylvie Bégu
- Institut Charles Gerhardt Montpellier-MACS
- UMR 5253 CNRS-UM-ENSCM
- ENSCM
- 34296 Montpellier
- France
| | - Thomas Cacciaguerra
- Institut Charles Gerhardt Montpellier-MACS
- UMR 5253 CNRS-UM-ENSCM
- ENSCM
- 34296 Montpellier
- France
| | - Anne Galarneau
- Institut Charles Gerhardt Montpellier-MACS
- UMR 5253 CNRS-UM-ENSCM
- ENSCM
- 34296 Montpellier
- France
| | - Thierry Azaïs
- Sorbonne Universités
- UPMC Univ Paris 06
- CNRS
- Collège de France
- Laboratoire de Chimie de la Matière Condensée de Paris
| | - Abdelkader Bengueddach
- Laboratory of Materials Chemistry
- Faculty of Applied and Exact Sciences
- University Oran 1-Ahmed Benbella
- Oran
- Algeria
| | - Francesco Di Renzo
- Institut Charles Gerhardt Montpellier-MACS
- UMR 5253 CNRS-UM-ENSCM
- ENSCM
- 34296 Montpellier
- France
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23
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Arletti R, Gigli L, Renzo FD, Quartieri S. How do zeolites capture CO 2? In situsynchrotron XRPD investigation of gas asdorption in FAU systems. Acta Crystallogr A Found Adv 2015. [DOI: 10.1107/s2053273315094759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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24
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Chan DY, Sega AG, Lee JY, Gao T, Cunin F, Renzo FD, Sailor MJ. Optical detection of C 2 hydrocarbons ethane, ethylene, and acetylene with a photonic crystal made from carbonized porous silicon. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2014.07.069] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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25
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Abstract
Antimatter is barely known by the chemist community and this article has the vocation to explain how antimatter, in particular antihydrogen, can be obtained, as well as to show how mesoporous materials could be used as a further improvement for the production of antimatter at very low temperatures (below 1 K). The first experiments with mesoporous materials highlighted in this review show very promising and exciting results. Mesoporous materials such as mesoporous silicon, mesoporous material films, pellets of MCM-41 and silica aerogel show remarkable features for antihydrogen formation. Yet, the characteristics for the best future mesoporous materials (e.g. pore sizes, pore connectivity, shape, surface chemistry) remain to be clearly identified. For now among the best candidates are pellets of MCM-41 and aerogel with pore sizes between 10 and 30 nm, possessing hydrophobic patches on their surface to avoid ice formation at low temperature. From a fundamental standpoint, antimatter experiments could help to shed light on open issues, such as the apparent asymmetry between matter and antimatter in our universe and the gravitational behaviour of antimatter. To this purpose, basic studies on antimatter are necessary and a convenient production of antimatter is required. It is exactly where mesoporous materials could be very useful.
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Affiliation(s)
- Giovanni Consolati
- Department of Aerospace Science and Technology, Politecnico di Milano, via La Masa 34, 20156, Milano, Italy.
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26
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Affiliation(s)
- Benoit Coasne
- Institut Charles Gerhardt Montpellier, CNRS (UMR 5253), University Montpellier 2, ENSCM, 8 rue de l'Ecole Normale, 34296 Montpellier, France.
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27
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Agulhon P, Constant S, Chiche B, Lartigue L, Larionova J, Di Renzo F, Quignard F. Controlled synthesis from alginate gels of cobalt–manganese mixed oxide nanocrystals with peculiar magnetic properties. Catal Today 2012. [DOI: 10.1016/j.cattod.2012.03.052] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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28
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Boutin A, Coasne B, Fuchs AH, Galarneau A, Di Renzo F. Experiment and theory of low-pressure nitrogen adsorption in organic layers supported or grafted on inorganic adsorbents: toward a tool to characterize surfaces of hybrid organic/inorganic systems. Langmuir 2012; 28:9526-9534. [PMID: 22650762 DOI: 10.1021/la301154e] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We report experimental nitrogen adsorption isotherms of organics-coated silicas, which exhibit a low-pressure desorption branch that does not meet the adsorption branch upon emptying of the pores. To address the physical origin of such a hysteresis loop, we propose an equilibrium thermodynamic model that enables one to explain this phenomenon. The present model assumes that, upon adsorption, a small amount of nitrogen molecules penetrate within the organic layer and reach adsorption sites that are located on the inorganic surface, between the grafted or adsorbed organic molecules. The number of accessible adsorption sites thus varies with the increasing gas pressure, and then we assume that it stays constant upon desorption. Comparison with experimental data shows that our model captures the features of nitrogen adsorption on such hybrid organic/inorganic materials. In particular, in addition to predicting the shape of the adsorption isotherm, the model is able to estimate, with a reasonable number of adjustable parameters, the height of the low-pressure hysteresis loop and to assess in a qualitative fashion the local density of the organic chains at the surface of the material.
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Affiliation(s)
- Anne Boutin
- Laboratoire Pasteur, CNRS-ENS-UPMC, Département de Chimie, Ecole Normale Supérieure, 24 rue Lhomond, 75231 Paris Cedex 05, France.
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Montagna G, Arletti R, Vezzalini G, Di Renzo F. Borosilicate and aluminosilicate pollucite nanocrystals for the storage of radionuclides. POWDER TECHNOL 2011. [DOI: 10.1016/j.powtec.2010.08.048] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Galarneau A, Sartori F, Cangiotti M, Mineva T, Renzo FD, Ottaviani MF. Sponge Mesoporous Silica Formation Using Disordered Phospholipid Bilayers as Template. J Phys Chem B 2010; 114:2140-52. [DOI: 10.1021/jp908828q] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Anne Galarneau
- Institut Charles Gerhardt Montpellier, UMR 5253 CNRS/UM2/ENSCM /UM1, ENSCM, 8 rue de l’Ecole Normale, 34296 Montpellier Cedex 5, France, and Department of Geological Sciences, Chemical and Environmental Technologies, University of Urbino, Loc. Crocicchia, 61029 Urbino, Italy
| | - Federica Sartori
- Institut Charles Gerhardt Montpellier, UMR 5253 CNRS/UM2/ENSCM /UM1, ENSCM, 8 rue de l’Ecole Normale, 34296 Montpellier Cedex 5, France, and Department of Geological Sciences, Chemical and Environmental Technologies, University of Urbino, Loc. Crocicchia, 61029 Urbino, Italy
| | - Michela Cangiotti
- Institut Charles Gerhardt Montpellier, UMR 5253 CNRS/UM2/ENSCM /UM1, ENSCM, 8 rue de l’Ecole Normale, 34296 Montpellier Cedex 5, France, and Department of Geological Sciences, Chemical and Environmental Technologies, University of Urbino, Loc. Crocicchia, 61029 Urbino, Italy
| | - Tzonka Mineva
- Institut Charles Gerhardt Montpellier, UMR 5253 CNRS/UM2/ENSCM /UM1, ENSCM, 8 rue de l’Ecole Normale, 34296 Montpellier Cedex 5, France, and Department of Geological Sciences, Chemical and Environmental Technologies, University of Urbino, Loc. Crocicchia, 61029 Urbino, Italy
| | - Francesco Di Renzo
- Institut Charles Gerhardt Montpellier, UMR 5253 CNRS/UM2/ENSCM /UM1, ENSCM, 8 rue de l’Ecole Normale, 34296 Montpellier Cedex 5, France, and Department of Geological Sciences, Chemical and Environmental Technologies, University of Urbino, Loc. Crocicchia, 61029 Urbino, Italy
| | - M. Francesca Ottaviani
- Institut Charles Gerhardt Montpellier, UMR 5253 CNRS/UM2/ENSCM /UM1, ENSCM, 8 rue de l’Ecole Normale, 34296 Montpellier Cedex 5, France, and Department of Geological Sciences, Chemical and Environmental Technologies, University of Urbino, Loc. Crocicchia, 61029 Urbino, Italy
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Chang SS, Clair B, Ruelle J, Beauchêne J, Di Renzo F, Quignard F, Zhao GJ, Yamamoto H, Gril J. Mesoporosity as a new parameter for understanding tension stress generation in trees. J Exp Bot 2009; 60:3023-30. [PMID: 19436045 DOI: 10.1093/jxb/erp133] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
The mechanism for tree orientation in angiosperms is based on the production of high tensile stress on the upper side of the inclined axis. In many species, the stress level is strongly related to the presence of a peculiar layer, called the G-layer, in the fibre cell wall. The structure of the G-layer has recently been described as a hydrogel thanks to N(2) adsorption-desorption isotherms of supercritically dried samples showing a high mesoporosity (pores size from 2-50 nm). This led us to revisit the concept of the G-layer that had been, until now, only described from anatomical observation. Adsorption isotherms of both normal wood and tension wood have been measured on six tropical species. Measurements show that mesoporosity is high in tension wood with a typical thick G-layer while it is much less with a thinner G-layer, sometimes no more than normal wood. The mesoporosity of tension wood species without a G-layer is as low as in normal wood. Not depending on the amount of pores, the pore size distribution is always centred around 6-12 nm. These results suggest that, among species producing fibres with a G-layer, large structural differences of the G-layer exist between species.
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Affiliation(s)
- Shan-Shan Chang
- Laboratoire de Mécanique et Génie Civil, Université Montpellier 2, CNRS, Pl. E. Bataillon, cc 048, 34095 Montpellier Cedex 5, France
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Escudero RR, Robitzer M, Di Renzo F, Quignard F. Alginate aerogels as adsorbents of polar molecules from liquid hydrocarbons: Hexanol as probe molecule. Carbohydr Polym 2009. [DOI: 10.1016/j.carbpol.2008.06.008] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Robitzer M, David L, Rochas C, Di Renzo F, Quignard F. Nanostructure of calcium alginate aerogels obtained from multistep solvent exchange route. Langmuir 2008; 24:12547-12552. [PMID: 18844384 DOI: 10.1021/la802103t] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Ca-alginate materials were studied by small-angle X-ray scattering (SAXS) at different steps of conversion from gel to aerogel in order to determine the relation between the polymer organization at the nanoscale in the gels and the final dry aerogel. In all cases, i.e. before and after the different exchanges of solvents and after the formation of the aerogel, the SAXS patterns exhibit an asymptotic behavior at low q values (in the experimental q range 7x10(-3) up to 2.10(-2) A(-1)) close to I(q) approximately q(-1), indicative of randomly oriented rod-like scattering objects. The evolution of the diameter of such rod-like objects was thus deduced from the maxima observed on Kratky plots, i.e. I(q) q2 vs q. The results are in perfect agreement qualitatively (rod-like anisometry type of the scattering objects) and quantitatively (diameter of the rods) with direct SEM observations of the morphology of aerogels and with the results of N2 adsorption on the aerogel. This is evidence that in the chosen experimental processing conditions, the morphology of the aerogel depends on the morphology of pre-existing objects within the gel, i.e. that the structure of the aerogel provides a correct image of the structure of the parent gel.
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Affiliation(s)
- Mike Robitzer
- Institut Charles Gerhardt Montpellier, UMR 5253 CNRS-ENSCM-UM2-UM1, Matériaux Avancés pour la Catalyse et la Santé, ENSCM, 8 rue Ecole Normale, 34296 Montpellier Cedex 5, France
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Coasne B, Di Renzo F, Galarneau A, Pellenq RJM. Adsorption of simple fluid on silica surface and nanopore: effect of surface chemistry and pore shape. Langmuir 2008; 24:7285-7293. [PMID: 18522440 DOI: 10.1021/la800567g] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
This paper reports a molecular simulation study on the adsorption of simple fluids (argon at 77 K) on hydroxylated silica surfaces and nanopores. The effect of surface chemistry is addressed by considering substrates with either partially or fully hydroxylated surfaces. We also investigate the effect of pore shape on adsorption and capillary condensation by comparing the results for cylindrical and hexagonal nanopores having equivalent sections (i.e., equal section areas). Due to the increase in the polarity of the surface with the density of OH groups, the adsorbed amounts for fully hydroxylated surfaces are found to be larger than those for partially hydroxylated surfaces. Both the adsorption isotherms for the cylindrical and hexagonal pores conform to the typical behavior observed in the experiments for adsorption/condensation in cylindrical nanopores MCM-41. Capillary condensation occurs through an irreversible discontinuous transition between the partially filled and the completely filled configurations, while evaporation occurs through the displacement at equilibrium of a hemispherical meniscus along the pore axis. Our data are also used to discuss the effect of surface chemistry and pore shape on the BET method. The BET surface for fully hydroxylated surfaces is much larger (by 10-20%) than the true geometrical surface. In contrast, the BET surface significantly underestimates the true surface when partially hydroxylated surfaces are considered. These results suggest that the surface chemistry and the choice of the system adsorbate/adsorbent is crucial in determining the surface area of solids using the BET method.
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Affiliation(s)
- Benoit Coasne
- Institut Charles Gerhardt Montpellier, CNRS (UMR 5253) and Université Montpellier 2, Montpellier, France.
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Clair B, Gril J, Di Renzo F, Yamamoto H, Quignard F. Characterization of a gel in the cell wall to elucidate the paradoxical shrinkage of tension wood. Biomacromolecules 2007; 9:494-8. [PMID: 18163579 DOI: 10.1021/bm700987q] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Wood behavior is characterized by high sensibility to humidity and strongly anisotropic properties. The drying shrinkage along the fibers, usually small due to the reinforcing action of cellulosic microfibrils, is surprisingly high in the so-called tension wood, produced by trees to respond to strong reorientation requirements. In this study, nitrogen adsorption-desorption isotherms of supercritically dried tension wood and normal wood show that the tension wood cell wall has a gel-like structure characterized by a pore surface more than 30 times higher than that in normal wood. Syneresis of the tension wood gel explains its paradoxical drying shrinkage. This result could help to reduce technological problems during drying. Potential applications in biomechanics and biomimetics are worth investigating, considering that, in living trees, tension wood produces tensile growth stresses 10 times higher than that of normal wood.
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Affiliation(s)
- Bruno Clair
- Laboratoire de Mécanique et Génie Civil, Université Montpellier 2, CNRS, 34095 Montpellier, France.
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Valentin R, Bonelli B, Garrone E, Di Renzo F, Quignard F. Accessibility of the Functional Groups of Chitosan Aerogel Probed by FT-IR-Monitored Deuteration. Biomacromolecules 2007; 8:3646-50. [PMID: 17910493 DOI: 10.1021/bm070391a] [Citation(s) in RCA: 82] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Transmission FT-IR spectroscopy allowed us to monitor the deuteration of wafers of chitosan aerogel and xerogel by D2O vapor at room temperature. The complete deuteration of the alcohol and amine groups of the aerogel (surface area 175 m2 g(-1) as measured by N2 volumetry) confirmed the high accessibility of the functional groups of the polymer. The xerogel (surface area 5 m2 g(-1)) was only partially deuterated in more severe conditions. The isotopic shift of the deuterated groups allowed us to confirm or revise some attributions of infrared bands of chitosan.
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Affiliation(s)
- Romain Valentin
- Dipartimento di Scienza dei Materiali e Ingegneria Chimica, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Turin, Italy
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Coasne B, Galarneau A, Di Renzo F, Pellenq RJM. Gas adsorption in mesoporous micelle-templated silicas: MCM-41, MCM-48, and SBA-15. Langmuir 2006; 22:11097-105. [PMID: 17154590 DOI: 10.1021/la061728h] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
This paper reports a molecular simulation and experimental study on the adsorption and condensation of simple fluids in mesoporous micelle-templated silicas MCM-41, MCM-48, and SBA-15. MCM-41 is described as a regular cylindrical silica nanopore, while SBA-15 is assumed to be made up of cylindrical nanopores that are connected through lateral channels. The 3D-connected topology of MCM-48 is described using a gyroid periodic minimal surface. Argon adsorption at 77 K is calculated for the three materials using Grand Canonical Monte Carlo simulations. Qualitative comparison with experiments for nitrogen adsorption in mesoporous micelle-templated silicas is made. The adsorption isotherm for SBA-15 resembles that for MCM-41. In particular, capillary condensation and evaporation are not affected by the presence of the connecting lateral channels. In contrast, the argon adsorption isotherm for MCM-48 departs from that for MCM-41 having the same pore size. While condensation in MCM-41 is a one-step process, filling of MCM-48 involves two successive jumps in the adsorbed amounts which correspond to condensation in different domains of the porosity. The condensation pressure for MCM-48 is larger than that for MCM-41. We attribute this result to the morphology of the MCM-48 surface (made up of both concave and convex regions) that differs from that for MCM-41 (concave only). Our results suggest that the pore connectivity affects pore filling when the size of the connections is comparable to that of the nanopores.
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Affiliation(s)
- Benoit Coasne
- Laboratoire de Physicochimie de la Matière Condensée, Institut Charles Gerhardt, UMR 5617 CNRS and Université Montpellier 2, Place Eugène Bataillon, 34095 Montpellier Cedex 05, France.
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Abstract
The acidity of alginate aerogel films has been investigated by infrared spectroscopy of adsorbed NH(3). Supercritical drying of the alginate provided samples with a surface area of several hundred square meters per gram, in which the probe molecule could reach all acidic sites. Free carboxylic groups were studied on acid-gelled alginates and were found to behave as effective Brønsted acid sites. Ionotropic alginate gels formed by alkaline earth cations presented only the Lewis acidity of the cations. Ionotropic gels formed by transition metal cations presented both Lewis and Brønsted sites, because of the presence of a fraction of free carboxylic groups. The incomplete salification was correlated to the pH of the gelling solutions.
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Affiliation(s)
- Romain Valentin
- Laboratoire de Matériaux Catalytiques et Catalyse en Chimie Organique, UMR 5618 CNRS-ENSCM-UM1, Institut C. Gerhardt, FR 1878, 8 rue de l'Ecole Normale, 34296 Montpellier Cedex 5, France
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Valentin R, Horga R, Bonelli B, Garrone E, Di Renzo F, Quignard F. Acidity of Alginate Aerogels Studied by FTIR Spectroscopy of Probe Molecules. ACTA ACUST UNITED AC 2005. [DOI: 10.1002/masy.200551144] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Trens P, Tanchoux N, Galarneau A, Brunel D, Fubini B, Garrone E, Fajula F, Di Renzo F. A macrothermodynamic approach to the limit of reversible capillary condensation. Langmuir 2005; 21:8560-4. [PMID: 16114972 DOI: 10.1021/la0507838] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
The threshold of reversible capillary condensation is a well-defined thermodynamic property, as evidenced by corresponding states treatment of literature and experimental data on the lowest closure point of the hysteresis loop in capillary condensation-evaporation cycles for several adsorbates. The nonhysteretical filling of small mesopores presents the properties of a first-order phase transition, confirming that the limit of condensation reversibility does not coincide with the pore critical point. The enthalpy of reversible capillary condensation can be calculated by a Clausius-Clapeyron approach and is consistently larger than the condensation heat in unconfined conditions. Calorimetric data on the capillary condensation of tert-butyl alcohol in MCM-41 silica confirm a 20% increase of condensation heat in small mesopores. This enthalpic advantage makes easier the overcoming of the adhesion forces by the capillary forces and justifies the disappearing of the hysteresis loop.
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Affiliation(s)
- Philippe Trens
- Laboratoire de Matériaux Catalytiques et Catalyse en Chimie Organique, UMR 5618 CNRS-ENSCM-UM1, Institut C. Gerhardt, FR 1878, ENSCM, 8 rue Ecole Normale, 34296 Montpellier, France
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Di Renzo F, Fajula F. Introduction to molecular sieves: trends of evolution of the zeolite community. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/s0167-2991(05)80003-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
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Moscatelli A, Galarneau A, Di Renzo F, Ottaviani MF. Hosting Ability of Mesoporous Micelle-Templated Silicas toward Organic Molecules of Different Polarity. J Phys Chem B 2004. [DOI: 10.1021/jp047030z] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alberto Moscatelli
- Institute of Chemical Sciences, University of Urbino, Piazza Rinascimento 6, 61029 Urbino, Italy, and Laboratoire de Matériaux Catalytiques et Catalyze en Chimie Organique, UMR 5618 ENSCM-CNRS, 8 rue de l'Ecole Normale, 34296 Montpellier Cedex 5, France
| | - Anne Galarneau
- Institute of Chemical Sciences, University of Urbino, Piazza Rinascimento 6, 61029 Urbino, Italy, and Laboratoire de Matériaux Catalytiques et Catalyze en Chimie Organique, UMR 5618 ENSCM-CNRS, 8 rue de l'Ecole Normale, 34296 Montpellier Cedex 5, France
| | - Francesco Di Renzo
- Institute of Chemical Sciences, University of Urbino, Piazza Rinascimento 6, 61029 Urbino, Italy, and Laboratoire de Matériaux Catalytiques et Catalyze en Chimie Organique, UMR 5618 ENSCM-CNRS, 8 rue de l'Ecole Normale, 34296 Montpellier Cedex 5, France
| | - M. Francesca Ottaviani
- Institute of Chemical Sciences, University of Urbino, Piazza Rinascimento 6, 61029 Urbino, Italy, and Laboratoire de Matériaux Catalytiques et Catalyze en Chimie Organique, UMR 5618 ENSCM-CNRS, 8 rue de l'Ecole Normale, 34296 Montpellier Cedex 5, France
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Ottaviani MF, Moscatelli A, Desplantier-Giscard D, Di Renzo F, Kooyman PJ, Alonso B, Galarneau A. Synthesis of Micelle-Templated Silicas from Cetyltrimethylammonium Bromide/1,3,5-Trimethylbenzene Micelles. J Phys Chem B 2004. [DOI: 10.1021/jp049032p] [Citation(s) in RCA: 78] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- M. Francesca Ottaviani
- Institute of Chemical Sciences, University of Urbino, Piazza Rinascimento 6, 61029 Urbino, Italy, Laboratoire de Matériaux Catalytiques et Catalyse en Chimie Organique, UMR 5618 ENSCMCNRS, 8 rue de l'Ecole Normale, 34296 Montpellier Cedex 5, France, National Center for HREM, Julianalaan 136, 2628 BL Delft, The Netherlands, and CRMHT CNRS 1D, Avenue de la recherche scientifique, 45071 Orléans, France
| | - Alberto Moscatelli
- Institute of Chemical Sciences, University of Urbino, Piazza Rinascimento 6, 61029 Urbino, Italy, Laboratoire de Matériaux Catalytiques et Catalyse en Chimie Organique, UMR 5618 ENSCMCNRS, 8 rue de l'Ecole Normale, 34296 Montpellier Cedex 5, France, National Center for HREM, Julianalaan 136, 2628 BL Delft, The Netherlands, and CRMHT CNRS 1D, Avenue de la recherche scientifique, 45071 Orléans, France
| | - Delphine Desplantier-Giscard
- Institute of Chemical Sciences, University of Urbino, Piazza Rinascimento 6, 61029 Urbino, Italy, Laboratoire de Matériaux Catalytiques et Catalyse en Chimie Organique, UMR 5618 ENSCMCNRS, 8 rue de l'Ecole Normale, 34296 Montpellier Cedex 5, France, National Center for HREM, Julianalaan 136, 2628 BL Delft, The Netherlands, and CRMHT CNRS 1D, Avenue de la recherche scientifique, 45071 Orléans, France
| | - Francesco Di Renzo
- Institute of Chemical Sciences, University of Urbino, Piazza Rinascimento 6, 61029 Urbino, Italy, Laboratoire de Matériaux Catalytiques et Catalyse en Chimie Organique, UMR 5618 ENSCMCNRS, 8 rue de l'Ecole Normale, 34296 Montpellier Cedex 5, France, National Center for HREM, Julianalaan 136, 2628 BL Delft, The Netherlands, and CRMHT CNRS 1D, Avenue de la recherche scientifique, 45071 Orléans, France
| | - Patricia J. Kooyman
- Institute of Chemical Sciences, University of Urbino, Piazza Rinascimento 6, 61029 Urbino, Italy, Laboratoire de Matériaux Catalytiques et Catalyse en Chimie Organique, UMR 5618 ENSCMCNRS, 8 rue de l'Ecole Normale, 34296 Montpellier Cedex 5, France, National Center for HREM, Julianalaan 136, 2628 BL Delft, The Netherlands, and CRMHT CNRS 1D, Avenue de la recherche scientifique, 45071 Orléans, France
| | - Bruno Alonso
- Institute of Chemical Sciences, University of Urbino, Piazza Rinascimento 6, 61029 Urbino, Italy, Laboratoire de Matériaux Catalytiques et Catalyse en Chimie Organique, UMR 5618 ENSCMCNRS, 8 rue de l'Ecole Normale, 34296 Montpellier Cedex 5, France, National Center for HREM, Julianalaan 136, 2628 BL Delft, The Netherlands, and CRMHT CNRS 1D, Avenue de la recherche scientifique, 45071 Orléans, France
| | - Anne Galarneau
- Institute of Chemical Sciences, University of Urbino, Piazza Rinascimento 6, 61029 Urbino, Italy, Laboratoire de Matériaux Catalytiques et Catalyse en Chimie Organique, UMR 5618 ENSCMCNRS, 8 rue de l'Ecole Normale, 34296 Montpellier Cedex 5, France, National Center for HREM, Julianalaan 136, 2628 BL Delft, The Netherlands, and CRMHT CNRS 1D, Avenue de la recherche scientifique, 45071 Orléans, France
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Trens P, Tanchoux N, Maldonado D, Galarneau A, Di Renzo F, Fajula F. Study of n-hexane adsorption in MCM-41 mesoporous materials: a scaling effect approach of capillary condensation processes. NEW J CHEM 2004. [DOI: 10.1039/b401094a] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Galarneau A, Cambon H, Di Renzo F, Ryoo R, Choi M, Fajula F. Microporosity and connections between pores in SBA-15 mesostructured silicas as a function of the temperature of synthesis. NEW J CHEM 2002. [DOI: 10.1039/b207378c] [Citation(s) in RCA: 466] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Bourgeat-Lami E, Di Renzo F, Fajula F, Mutin PH, Des Courieres T. Mechanism of the thermal decomposition of tetraethylammonium in zeolite .beta. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100188a044] [Citation(s) in RCA: 83] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Galameau A, Cambon H, Martin T, De Ménorval LC, Brunel D, Di Renzo F, Fajula F. SBA-15 versus MCM-41: are they the same materiais? Nanoporous Materials III, Proceedings of the 3rdInternational Symposium on Nanoporous Materials 2002. [DOI: 10.1016/s0167-2991(02)80567-5] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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