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Bérard R, Sassoye C, Terrisse H, Bertoncini P, Humbert B, Cassaignon S, Le Caër S. Effect of Crystalline Phase and Facet Nature on the Adsorption of Phosphate Species onto TiO 2 Nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:16258-16271. [PMID: 39039729 DOI: 10.1021/acs.langmuir.4c01447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/24/2024]
Abstract
The current use of TiO2 nanoparticles raises questions about their impact on our health. Cells interact with these nanoparticles via the phospholipid membrane and, in particular, the phosphate head. This highlights the significance of understanding the interaction between phosphates and nanoparticles possessing distinct crystalline structures, specifically anatase and rutile. It is crucial to determine whether this adsorption varies based on the exposed facet(s). Consequently, various nanoparticles of anatase and rutile TiO2, characterized by well-defined morphologies, were synthesized. In the case of the anatase samples, bipyramids, needles, and cubes were obtained. For the rutile samples, all exhibited a needle-like shape, featuring {110} facets along the long direction of the needles and facets {111} on the upper and lower parts. Phosphate adsorption experiments carried out at pH 2 revealed that the maximum adsorption was relatively consistent across all samples, averaging around 1.5 phosphate·nm-2 in all cases. Experiments using infrared spectroscopy on dried TiO2 powders showed that phosphates were chemisorbed on the surfaces and that the mode of adsorption depended on the crystalline phase and the nature of the facet: the anatase phase favors bidentate adsorption more than the rutile crystalline phase.
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Affiliation(s)
- Rémi Bérard
- NIMBE, CEA, CNRS, Université Paris-Saclay, CEA Saclay, 91191 Gif sur Yvette Cedex, France
- Sorbonne Université, CNRS, Laboratoire Chimie de la Matière Condensée de Paris, LCMCP, UMR 7574, 4 Place Jussieu, 75005 Paris, France
| | - Capucine Sassoye
- Sorbonne Université, CNRS, Laboratoire Chimie de la Matière Condensée de Paris, LCMCP, UMR 7574, 4 Place Jussieu, 75005 Paris, France
| | - Hélène Terrisse
- Nantes Université, CNRS, Institut des Matériaux de Nantes Jean Rouxel, IMN, UMR 6502, 2 rue de la Houssinière, 44000 Nantes, France
| | - Patricia Bertoncini
- Nantes Université, CNRS, Institut des Matériaux de Nantes Jean Rouxel, IMN, UMR 6502, 2 rue de la Houssinière, 44000 Nantes, France
| | - Bernard Humbert
- Nantes Université, CNRS, Institut des Matériaux de Nantes Jean Rouxel, IMN, UMR 6502, 2 rue de la Houssinière, 44000 Nantes, France
| | - Sophie Cassaignon
- Sorbonne Université, CNRS, Laboratoire Chimie de la Matière Condensée de Paris, LCMCP, UMR 7574, 4 Place Jussieu, 75005 Paris, France
| | - Sophie Le Caër
- NIMBE, CEA, CNRS, Université Paris-Saclay, CEA Saclay, 91191 Gif sur Yvette Cedex, France
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2
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Lo Dico G, Lisuzzo L, Carcelén V, Cavallaro G, Haranczyk M. Thermogravimetric Analysis of Moisture in Natural and Thermally Treated Clay Materials. MATERIALS (BASEL, SWITZERLAND) 2024; 17:2231. [PMID: 38793298 PMCID: PMC11123035 DOI: 10.3390/ma17102231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2024] [Revised: 04/30/2024] [Accepted: 05/07/2024] [Indexed: 05/26/2024]
Abstract
Clays are a class of porous materials; their surfaces are naturally covered by moisture. Weak thermal treatment may be considered practical to remove the water molecules, changing the surface properties and making the micro- and/or mesoporosities accessible to interact with other molecules. Herein, a modulated thermogravimetric analysis (MTGA) study of the moisture behavior on the structures of five, both fibrous and laminar, clay minerals is reported. The effect of the thermal treatment at 150 °C, which provokes the release of weakly adsorbed water molecules, was also investigated. The activation energies for the removal of the adsorbed water (Ea) were calculated, and they were found to be higher, namely, from 160 to 190 kJ mol-1, for fibrous clay minerals compared to lamellar structures, ranging in this latter case from 80 to 100 kJ mol-1. The thermal treatment enhances the rehydration in Na-montmorillonite, stevensite, and sepiolite structures with a decrease in the energy required to remove it, while Ea increases significantly in palygorskite (from 164 to 273 kJ mol-1). As a proof of concept, the MTGA results are statistically correlated, together with a full characterization of the physico-chemical properties of the five clay minerals, with the adsorption of two molecules, i.e., aflatoxin B1 (AFB1) and β-carotene. Herein, the amount of adsorbed molecules ranges from 12 to 97% for the former and from 22 to 35% for the latter, depending on the particular clay. The Ea was correlated with AFB1 adsorption with a Spearman score of -0.9. When the adsorbed water is forcibly removed, e.g., under vacuum conditions and high temperatures, the structure becomes the most important, decreasing the Spearman score between β-carotene and Ea to -0.6.
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Affiliation(s)
- Giulia Lo Dico
- IMDEA Materials Institute, C/Eric Kandel 2, Getafe, 28906 Madrid, Spain;
- Tolsa Group, Carretera de Madrid a Rivas Jarama, 35, 28031 Madrid, Spain;
- Department of Materials Science and Engineering, Universidad Carlos III de Madrid, Avda. de la Unive sidad, 30, Leganés, 28911 Madrid, Spain
- Department of Physics and Chemistry, University of Palermo, Viale delle Scienze, pad. 17, 90128 Palermo, Italy;
| | - Lorenzo Lisuzzo
- Department of Physics and Chemistry, University of Palermo, Viale delle Scienze, pad. 17, 90128 Palermo, Italy;
| | - Verónica Carcelén
- Tolsa Group, Carretera de Madrid a Rivas Jarama, 35, 28031 Madrid, Spain;
- Department of Materials Science and Engineering, Universidad Carlos III de Madrid, Avda. de la Unive sidad, 30, Leganés, 28911 Madrid, Spain
| | - Giuseppe Cavallaro
- Department of Physics and Chemistry, University of Palermo, Viale delle Scienze, pad. 17, 90128 Palermo, Italy;
| | - Maciej Haranczyk
- IMDEA Materials Institute, C/Eric Kandel 2, Getafe, 28906 Madrid, Spain;
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Raghuram E, Padmarajan R, Kalpathy SK. Hydrogen bond induced solvent ordering in aqueous poly (sodium p-styrenesulfonate). POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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4
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Water and Ion Dynamics in Confined Media: A Multi-Scale Study of the Clay/Water Interface. COLLOIDS AND INTERFACES 2021. [DOI: 10.3390/colloids5020034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
This review details a large panel of experimental studies (Inelastic Neutron Scattering, Quasi-Elastic Neutron Scattering, Nuclear Magnetic Resonance relaxometry, Pulsed-Gradient Spin-Echo attenuation, Nuclear Magnetic Resonance Imaging, macroscopic diffusion experiments) used recently to probe, over a large distribution of characteristic times (from pico-second up to days), the dynamical properties of water molecules and neutralizing cations diffusing within clay/water interfacial media. The purpose of this review is not to describe these various experimental methods in detail but, rather, to investigate the specific dynamical information obtained by each of them concerning these clay/water interfacial media. In addition, this review also illustrates the various numerical methods (quantum Density Functional Theory, classical Molecular Dynamics, Brownian Dynamics, macroscopic differential equations) used to interpret these various experimental data by analyzing the corresponding multi-scale dynamical processes. The purpose of this multi-scale study is to perform a bottom-up analysis of the dynamical properties of confined ions and water molecules, by using complementary experimental and numerical studies covering a broad range of diffusion times (between pico-seconds up to days) and corresponding diffusion lengths (between Angstroms and centimeters). In the context of such a bottom-up approach, the numerical modeling of the dynamical properties of the diffusing probes is based on experimental or numerical investigations performed on a smaller scale, thus avoiding the use of empirical or fitted parameters.
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Abstract
Saponite is a trioctahedral 2:1 smectite with the ideal composition MxMg3AlxSi4−xO10(OH,F)2.nH2O (M = interlayer cation). Both the success of the saponite synthesis and the determination of its applications depends on robust knowledge of the structure and composition of saponite. Among the routine characterization techniques, spectroscopic methods are the most common. This review, thus, provides an overview of various spectroscopic methods to characterize natural and synthetic saponites with focus on the extensive work by one of the authors (JTK). The Infrared (IR) and Raman spectra of natural and synthetic saponites are discussed in detail including the assignment of the observed bands. The crystallization of saponite is discussed based on the changes in the IR and Raman spectra and a possible crystallization model is provided. Infrared emission spectroscopy has been used to study the thermal changes of saponite in situ including the dehydration and (partial) dehydroxylation up to 750 °C. 27Al and 29Si magic-angle-spinning nuclear magnetic resonance spectroscopy is discussed (as well as 11B and 71Ga for B- and Ga-Si substitution) with respect to, in particular, Al(IV)/Al(VI) and Si/Al(IV) ratios. X-ray photoelectron spectroscopy provides chemical information as well as some information related to the local environments of the different elements in the saponite structure as reflected by their binding energies.
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Gaboreau S, Grangeon S, Claret F, Ihiawakrim D, Ersen O, Montouillout V, Maubec N, Roosz C, Henocq P, Carteret C. Hydration Properties and Interlayer Organization in Synthetic C-S-H. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:9449-9464. [PMID: 32696647 DOI: 10.1021/acs.langmuir.0c01335] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Water in calcium silicate hydrate (C-S-H) is one of the key parameters driving the macroscopic behavior of cement materials for which water vapor partial pressure has an impact on Young's modulus and the volumic properties. Several samples of C-S-H with a bulk Ca/Si ratio ranging between 0.6 and 1.6 were characterized to study their dehydration/hydration behavior under water-controlled conditions using29Si NMR, water adsorption volumetry, X-ray diffraction, and Fourier-transform near-infrared diffuse reflectance under various water pressures. Coherent with several previous studies, it was observed that an increase in the Ca/Si ratio is due to the progressive omission of Si bridging tetrahedra, with the resulting charge being compensated for by interlayer Ca, and that water conditioning influences the layer-to-layer distance and the achieved NMR spectral resolution. Water desorption experiments exhibit one step toward low relative pressure, accompanied by a decrease in the layer-to-layer distance. When sufficient energy is provided to the system (T ≥ 40 °C under vacuum) to remove the interlayer water, the shrinkage/swelling is partially reversible in our experimental conditions. A change in layer-to-layer distance of less than 3 Å is measured in the C-S-H between the wet and dried states. When the bridging SiO2 tetrahedra are omitted, interlayer Ca interacts with layer O and water interacts with the cations and potentially with the surfaces. This structural organization is interpreted as a mid-plane monolayer of water in the interlayer space, this latter accounting for about 30% of the volume of C-S-H particles.
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Affiliation(s)
| | - Sylvain Grangeon
- BRGM, 3, avenue Claude Guillemin, Orléans Cedex 2 F-45060, France
| | - Francis Claret
- BRGM, 3, avenue Claude Guillemin, Orléans Cedex 2 F-45060, France
| | - Dris Ihiawakrim
- University of Strasbourg, CNRS, IPCMS, UMR 7504, 23 Rue du Loess, Strasbourg 67034, France
| | - Ovidiu Ersen
- University of Strasbourg, CNRS, IPCMS, UMR 7504, 23 Rue du Loess, Strasbourg 67034, France
| | - Valerie Montouillout
- CNRS-CEMHTI UPR 3079, 1D Avenue de la Recherche Scientifique, Orléans cedex 2 45071, France
| | - Nicolas Maubec
- BRGM, 3, avenue Claude Guillemin, Orléans Cedex 2 F-45060, France
| | - Cedric Roosz
- BRGM, 3, avenue Claude Guillemin, Orléans Cedex 2 F-45060, France
| | - Pierre Henocq
- Andra, 1/7 rue Jean Monnet, Parc de la Croix Blanche, Châtenay-Malabry Cedex 92298, France
| | - Cédric Carteret
- LCPME, UMR 7564, CNRS-Université de Lorraine, 405 Rue de Vandoeuvre, Villers-les-Nancy 54600,France
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7
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Porion P, Delville A. A Multi-Scale Study of Water Dynamics under Confinement, Exploiting Numerical Simulations in Relation to NMR Relaxometry, PGSE and NMR Micro-Imaging Experiments: An Application to the Clay/Water Interface. Int J Mol Sci 2020; 21:E4697. [PMID: 32630160 PMCID: PMC7369841 DOI: 10.3390/ijms21134697] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 06/19/2020] [Accepted: 06/22/2020] [Indexed: 11/17/2022] Open
Abstract
Water mobility within the porous network of dense clay sediments was investigated over a broad dynamical range by using 2H nuclear magnetic resonance spectroscopy. Multi-quanta 2H NMR spectroscopy and relaxation measurements were first performed to identify the contributions of the various relaxation mechanisms monitoring the time evolution of the nuclear magnetisation of the confined heavy water. Secondly, multi-quanta spin-locking NMR relaxation measurements were then performed over a broad frequency domain, probing the mobility of the confined water molecules on a time-scale varying between microseconds and milliseconds. Thirdly, 1H NMR pulsed-gradient spin-echo attenuation experiments were performed to quantify water mobility on a time-scale limited by the NMR transverse relaxation time of the confined NMR probe, typically a few milliseconds. Fourthly, the long living quantum state of the magnetisation of quadrupolar nuclei was exploited to probe a two-time correlation function at a time-scale reaching one second. Finally, magnetic resonance imaging measurements allow probing the same dynamical process on time-scales varying between seconds and several hours. In that context, multi-scale modelling is required to interpret these NMR measurements and extract information on the influences of the structural properties of the porous network on the apparent mobility of the diffusing water molecules. That dual experimental and numerical approach appears generalizable to a large variety of porous networks, including zeolites, micelles and synthetic or biological membranes.
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Affiliation(s)
- Patrice Porion
- Interfaces, Confinement, Matériaux et Nanostructures (ICMN), UMR 7374, CNRS and Université d’Orléans, 1b rue de la Férollerie, CS 40059, CEDEX 2, F-45071 Orléans, France
| | - Alfred Delville
- Interfaces, Confinement, Matériaux et Nanostructures (ICMN), UMR 7374, CNRS and Université d’Orléans, 1b rue de la Férollerie, CS 40059, CEDEX 2, F-45071 Orléans, France
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Grégoire B, Dazas B, Hubert F, Tertre E, Ferrage E, Grasset L, Petit S. Orientation measurements of clay minerals by polarized attenuated total reflection infrared spectroscopy. J Colloid Interface Sci 2020; 567:274-284. [PMID: 32062490 DOI: 10.1016/j.jcis.2020.02.021] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Revised: 01/28/2020] [Accepted: 02/07/2020] [Indexed: 11/25/2022]
Abstract
The orientation and organization of molecular guests within the interlayer of clay minerals control the reactivity and performance of tailored organo-clay materials. Such a detailed investigation of hybrid structure on the molecular scale is usually provided by computational methods with limited experimental validation. In this study, polarized attenuated total reflection infrared spectroscopy was used to extract quantitative orientation measurements of montmorillonite particles. The validity of the evanescent electric field amplitude calculations necessary to derive the order parameter was critically evaluated to propose a methodology for determining the orientation of the normal to the clay layer relative to a reference axis, enabling comparison with the results obtained from X-ray scattering experiments and molecular dynamic simulations. Subsequently, the orientation of the interlayer water dipole and surface hydroxyls with respect to the normal of the clay layer was experimentally determined, showing good agreement with molecular simulations. This methodology may provide quantitative insights into the molecular-level description of interfacial processes between organic molecules and clay minerals.
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Affiliation(s)
- Brian Grégoire
- Institut de Chimie des Milieux et Matériaux de Poitiers, UMR 7285 CNRS-Université de Poitiers, 5 rue Albert Turpain, TSA 51106, 86073 Poitiers Cedex 9, France.
| | - Baptiste Dazas
- Institut de Chimie des Milieux et Matériaux de Poitiers, UMR 7285 CNRS-Université de Poitiers, 5 rue Albert Turpain, TSA 51106, 86073 Poitiers Cedex 9, France
| | - Fabien Hubert
- Institut de Chimie des Milieux et Matériaux de Poitiers, UMR 7285 CNRS-Université de Poitiers, 5 rue Albert Turpain, TSA 51106, 86073 Poitiers Cedex 9, France
| | - Emmanuel Tertre
- Institut de Chimie des Milieux et Matériaux de Poitiers, UMR 7285 CNRS-Université de Poitiers, 5 rue Albert Turpain, TSA 51106, 86073 Poitiers Cedex 9, France
| | - Eric Ferrage
- Institut de Chimie des Milieux et Matériaux de Poitiers, UMR 7285 CNRS-Université de Poitiers, 5 rue Albert Turpain, TSA 51106, 86073 Poitiers Cedex 9, France
| | - Laurent Grasset
- Institut de Chimie des Milieux et Matériaux de Poitiers, UMR 7285 CNRS-Université de Poitiers, 5 rue Albert Turpain, TSA 51106, 86073 Poitiers Cedex 9, France
| | - Sabine Petit
- Institut de Chimie des Milieux et Matériaux de Poitiers, UMR 7285 CNRS-Université de Poitiers, 5 rue Albert Turpain, TSA 51106, 86073 Poitiers Cedex 9, France
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9
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Multi-Quanta Spin-Locking Nuclear Magnetic Resonance Relaxation Measurements: An Analysis of the Long-Time Dynamical Properties of Ions and Water Molecules Confined within Dense Clay Sediments. MAGNETOCHEMISTRY 2017. [DOI: 10.3390/magnetochemistry3040035] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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10
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Dudefoi W, Terrisse H, Richard-Plouet M, Gautron E, Popa F, Humbert B, Ropers MH. Criteria to define a more relevant reference sample of titanium dioxide in the context of food: a multiscale approach. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2017; 34:653-665. [PMID: 28105903 DOI: 10.1080/19440049.2017.1284346] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Titanium dioxide (TiO2) is a transition metal oxide widely used as a white pigment in various applications, including food. Due to the classification of TiO2 nanoparticles by the International Agency for Research on Cancer as potentially harmful for humans by inhalation, the presence of nanoparticles in food products needed to be confirmed by a set of independent studies. Seven samples of food-grade TiO2 (E171) were extensively characterised for their size distribution, crystallinity and surface properties by the currently recommended methods. All investigated E171 samples contained a fraction of nanoparticles, however, below the threshold defining the labelling of nanomaterial. On the basis of these results and a statistical analysis, E171 food-grade TiO2 totally differs from the reference material P25, confirming the few published data on this kind of particle. Therefore, the reference material P25 does not appear to be the most suitable model to study the fate of food-grade TiO2 in the gastrointestinal tract. The criteria currently to obtain a representative food-grade sample of TiO2 are the following: (1) crystalline-phase anatase, (2) a powder with an isoelectric point very close to 4.1, (3) a fraction of nanoparticles comprised between 15% and 45%, and (4) a low specific surface area around 10 m2 g-1.
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Affiliation(s)
- William Dudefoi
- a UR1268 BIA (Biopolymères Interactions Assemblages) , INRA , Nantes , France
| | - Hélène Terrisse
- b Institut des Matériaux Jean Rouxel (IMN) , Université de Nantes, CNRS , Nantes , France
| | | | - Eric Gautron
- b Institut des Matériaux Jean Rouxel (IMN) , Université de Nantes, CNRS , Nantes , France
| | - Florin Popa
- b Institut des Matériaux Jean Rouxel (IMN) , Université de Nantes, CNRS , Nantes , France
| | - Bernard Humbert
- b Institut des Matériaux Jean Rouxel (IMN) , Université de Nantes, CNRS , Nantes , France
| | - Marie-Hélène Ropers
- a UR1268 BIA (Biopolymères Interactions Assemblages) , INRA , Nantes , France
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11
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Roosz C, Gaboreau S, Grangeon S, Prêt D, Montouillout V, Maubec N, Ory S, Blanc P, Vieillard P, Henocq P. Distribution of Water in Synthetic Calcium Silicate Hydrates. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:6794-6805. [PMID: 27281114 DOI: 10.1021/acs.langmuir.6b00878] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Understanding calcium silicate hydrates (CSHs) is of paramount importance for understanding the behavior of cement materials because they control most of the properties of these man-made materials. The atomic scale water content and structure have a major influence on their properties, as is analogous with clay minerals, and we should assess these. Here, we used a multiple analytical approach to quantify water distribution in CSH samples and to determine the relative proportions of water sorbed on external and internal (interlayer) surfaces. Water vapor isotherms were used to explain the water distribution in the CSH microstructure. As with many layered compounds, CSHs have external and internal (interlayer) surfaces displaying multilayer adsorption of water molecules on external surfaces owing to the hydrophilic surfaces. Interlayer water was also quantified from water vapor isotherm, X-ray diffraction (XRD), and thermal gravimetric analyses (TGA) data, displaying nonreversible swelling/shrinkage behavior in response to drying/rewetting cycles. From this quantification and balance of water distribution, we were able to explain most of the widely dispersed data already published according to the various relative humidity (RH) conditions and measurement techniques. Stoichiometric formulas were proposed for the different CSH samples analyzed (0.6 < Ca/Si < 1.6), considering the interlayer water contribution.
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Affiliation(s)
- C Roosz
- UMR CNRS 7285 IC2MP, Université de Poitiers , Equipe HydrASA, rue Albert Turpain, Bat B8, 86022 Poitiers, France
- Environment and Process Division, BRGM , 3, avenue Claude Guillemin, F-45060 Orléans Cedex 2, France
- Andra , 1/7 rue Jean Monnet, Parc de la Croix Blanche, 92298 Châtenay-Malabry Cedex, France
| | - S Gaboreau
- Environment and Process Division, BRGM , 3, avenue Claude Guillemin, F-45060 Orléans Cedex 2, France
| | - S Grangeon
- Environment and Process Division, BRGM , 3, avenue Claude Guillemin, F-45060 Orléans Cedex 2, France
| | - D Prêt
- UMR CNRS 7285 IC2MP, Université de Poitiers , Equipe HydrASA, rue Albert Turpain, Bat B8, 86022 Poitiers, France
| | - V Montouillout
- CNRS-CEMHTI UPR 3079 , 1D Avenue de la Recherche Scientifique, 45071 Orléans Cedex 2, France
| | - N Maubec
- Environment and Process Division, BRGM , 3, avenue Claude Guillemin, F-45060 Orléans Cedex 2, France
| | - S Ory
- CNRS-CEMHTI UPR 3079 , 1D Avenue de la Recherche Scientifique, 45071 Orléans Cedex 2, France
| | - P Blanc
- Environment and Process Division, BRGM , 3, avenue Claude Guillemin, F-45060 Orléans Cedex 2, France
| | - P Vieillard
- UMR CNRS 7285 IC2MP, Université de Poitiers , Equipe HydrASA, rue Albert Turpain, Bat B8, 86022 Poitiers, France
| | - P Henocq
- Andra , 1/7 rue Jean Monnet, Parc de la Croix Blanche, 92298 Châtenay-Malabry Cedex, France
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12
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Calik MK, Ozdemir M. Synthesis, characterization and, swelling behavior of semi-IPN nanocomposite hydrogels of alginate with poly(N-isopropylacrylamide) crosslinked by nanoclay. J Appl Polym Sci 2015. [DOI: 10.1002/app.43222] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Meltem Kasapoglu Calik
- Department of Chemical Engineering; Gebze Technical University; Gebze Kocaeli 41400 Turkey
| | - Murat Ozdemir
- Department of Chemical Engineering; Gebze Technical University; Gebze Kocaeli 41400 Turkey
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13
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Pálková H, Hronský V, Bizovská V, Madejová J. Spectroscopic study of water adsorption on Li(+), TMA(+) and HDTMA(+) exchanged montmorillonite. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 149:751-761. [PMID: 25989613 DOI: 10.1016/j.saa.2015.04.065] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Revised: 03/20/2015] [Accepted: 04/16/2015] [Indexed: 06/04/2023]
Abstract
The potential of IR and NMR spectroscopy in characterization the interaction of water with natural and organically modified montmorillonites was introduced. Organoclays were prepared from Li-saturated montmorillonite (Li-S) and tetramethylammonium (TMA) or hexadecyltrimethylammonium (HDTMA) salts. The influence of organic cation size on the water vapour uptake was examined and a comparative study with natural clay mineral was provided. The near-IR spectra confirmed the reduced water content in TMA-S and HDTMA-S. After exposure of the samples to water vapour under various relative humidities (RH) the H2O content was determined. According to the adsorption isotherms the amount of water decreased in order Li-S>TMA-S>HDTMA-S. The intensities of the 2νOH and [Formula: see text] bands, corresponding to the vibrations of H2O, gradually increased in hydrated samples. The (13)C MAS NMR and near-IR of hydrated organoclays confirmed the presence of H2O close to the cation's headgroup. NMR signals of inner -CH2- groups in HDTMA-S were also affected by hydration: the intensity of disordered gauche conformers (31.1 ppm) overtook the intensity of ordered all-trans conformers (33.0 ppm).
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Affiliation(s)
- Helena Pálková
- Institute of Inorganic Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 845 36 Bratislava, Slovakia.
| | - Viktor Hronský
- Department of Physics, Faculty of Electrical Engineering and Informatics, Technical University of Košice, Park Komenského 2, 042 00 Košice, Slovakia.
| | - Valéria Bizovská
- Institute of Inorganic Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 845 36 Bratislava, Slovakia.
| | - Jana Madejová
- Institute of Inorganic Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 845 36 Bratislava, Slovakia.
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14
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Deshmukh SA, Kamath G, Sankaranarayanan SKRS. Comparison of the interfacial dynamics of water sandwiched between static and free-standing fully flexible graphene sheets. SOFT MATTER 2014; 10:4067-4083. [PMID: 24845025 DOI: 10.1039/c3sm53044b] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Classical molecular dynamics simulations are used to present a detailed atomistic picture of the instantaneous local structures of water and the structural evolution of stationary and dynamically evolving graphene-water interfaces. The confinement effects are strongly coupled to the nature of the interface, which eventually governs its nanoscopic structural arrangements and interface dynamics. We show that the structure, transport properties, and vibrational densities of states of proximal water molecules are strongly correlated with the nature of the graphene-water interface. We identify and correlate features in vibrational spectra with characteristic structural features observed at the atomic scale for the confined water molecules near a stationary and dynamically evolving hydrophobic surface such as graphene. Our simulations indicate that the local orientation, ordering, and solvation dynamics of interfacial water molecules are a strong function of the graphene slit-width, which is controlled by the nature of the interface (fully flexible vs. static). A monotonic decrease in local ordering with increasing slit-width was observed for the static graphene-water interface, whereas a non-monotonic variation was seen for its fully flexible counterpart. The simulation results offer useful insights into the effect of interfacial dynamics in defining the structure and transport properties at graphene-aqueous media interfaces. Finally these simulations provide a molecular level interpretation of the differential confinement effects arising from the dynamically evolving graphene-water interface.
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Affiliation(s)
- Sanket A Deshmukh
- Argonne National Laboratory, Center for Nanoscale Materials, 9700 S. Cass Avenue, Argonne, IL 60439-4806, USA.
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Jiménez-Ruiz M, Ferrage E, Delville A, Michot LJ. Anisotropy on the collective dynamics of water confined in swelling clay minerals. J Phys Chem A 2012; 116:2379-87. [PMID: 22324768 DOI: 10.1021/jp201543t] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Collective excitations of water confined in the interlayer space of swelling clay minerals were studied by means of inelastic neutron scattering. The effect of bidimensional confinement on the dynamics of the interlayer water was investigated by using a synthetic Na-saponite sample with a general formula of Si(7.3)Al(0.7)Mg(6)O(20)(OH)(4)Na(0.7) in a bilayer hydration state. Experimental results reveal two inelastic signals, different from those described for bulk water with a clear anisotropy on the low-energy excitation of the collective dynamics of interlayer water, this difference being stronger in the perpendicular direction. Results obtained for the parallel direction follow the same trend as bulk water, and the effect of the confinement is mainly manifested from the fact that clay interlayer water is more structured than bulk water. Data obtained in the perpendicular direction display a nondispersive behavior below a cutoff wavenumber value, Q(c), indicating a nonpropagative excitation below that value. Molecular dynamics simulations results agree qualitatively with the experimental results.
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Affiliation(s)
- M Jiménez-Ruiz
- Institut Laue Langevin, 6 Rue Jules Horowitz, BP. 156, F-38042 Grenoble Cedex 9, France.
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Marčelja S. Hydration forces near charged interfaces in terms of effective ion potentials. Curr Opin Colloid Interface Sci 2011. [DOI: 10.1016/j.cocis.2011.04.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Morphological Investigation into Starch Bio-Nanocomposites via Synchrotron Radiation and Differential Scanning Calorimetry. JOURNAL OF NANOTECHNOLOGY 2011. [DOI: 10.1155/2011/924582] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
We studied a hydrophilic, plasticized bionanocomposite system involving sorbitol plasticizer, amylose biopolymer, and montmorillonite (MMT) for the presence of competitive interactions among them at different moisture content. Synchrotron analysisviasmall angle X-ray scattering (SAXS) and thermal analysis using differential scanning calorimetry (DSC) were performed to understand crystalline growth and the distribution of crystalline domains within the samples. The SAXS diffraction patterns showed reduced interhelix spacing in the amylose network indicating strong amylose-sorbitol interactions. Depending on the sorbitol and MMT concentration, these interactions also affected the free moisture content and crystalline domains. Domains of around 95 Å and 312 Å were found in the low-moisture-content samples as compared to a single domain of 95 Å in the high-moisture-content samples. DSC measurements confirmed that the MMT increased the onset and the melting temperature of nanocomposites. Moreover, the results showed that the ternary interactions among sorbitol-amylose-MMT supported the crystalline heterogeneity through secondary nucleation.
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Porion P, Faugère AM, Michot LJ, Paineau E, Delville A. Orientational microdynamics and magnetic-field-induced ordering of clay platelets detected by 2H NMR spectroscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:7035-7044. [PMID: 20047274 DOI: 10.1021/la904298d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The orientation of montmorillonite clays induced by a static magnetic field is quantified by using (2)H NMR spectroscopy. Indeed, the residual quadrupolar splitting of the (2)H resonance line measured for heavy water is a direct consequence of the specific orientation of the clay platelets in the static magnetic field. In the dilute regime, this residual splitting increases linearly with clay concentration, which confirms that the clay/clay electrostatic repulsions remain negligible by comparison with the diamagnetic coupling of these anisotropic platelets. At higher concentration, the electrostatic repulsion between clay particles markedly enhances the detected splitting. Such enhancement is well predicted by numerical simulations. By varying the size of the clay platelets and the strength of the static magnetic field, it is possible to evaluate the order of magnitude of the diamagnetic susceptibility of these anisotropic colloids.
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Affiliation(s)
- Patrice Porion
- Centre de Recherche sur la Matière Divisée, CNRS-Université d'Orléans, UMR6619, 45071 Orléans Cedex 02, France.
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Wallis PJ, Chaffee AL, Gates WP, Patti AF, Scott JL. Partial exchange of Fe(III) montmorillonite with hexadecyltrimethylammonium cation increases catalytic activity for hydrophobic substrates. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:4258-4265. [PMID: 19916551 DOI: 10.1021/la9033047] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Fe(III) montmorillonite clay that was partially exchanged with hexadecyltrimethylammonium (HDTMA(+)) cations achieved increased catalytic activity for the oxidative coupling of hydrophobic organic substrates. A series of mixed-cation organoclays were produced, where the organic cation content ranged from 6 to 50% relative to the cation-exchange capacity (CEC) of the clay, and were tested for catalytic activity using different Fe(III)-mediated oxidative coupling reactions. Enhanced catalytic activity by Fe(3+)/HDTMA(+) montmorillonite for coupling hydrophobic substrates was observed, with maximum catalytic activity in the oxidative coupling of 2-naphthol observed at 6% HDTMA(+) coverage. However, maximum catalytic activity with a more hydrophobic substrate, anthrone, was achieved with 50% HDTMA(+) coverage, indicating that matching levels of organic modification to substrate hydrophobicity improves catalytic activity. The organization of the organic cations at the clay surfaces proved to be heterogeneous, as determined by scanning transmission X-ray microscopy (STXM) and powder X-ray diffraction. Results from molecular dynamics simulations supported the heterogeneous nature of the catalysts but also pointed toward large regions within the interlayers that may be filled with nonreactive hydrated Fe oxides resulting from the organic cation treatment. The exchangeable Fe content of the organic treated clays, as determined by AAS and ICP measurements, was observed to be higher than expected relative to that of Fe-saturated clay, substantiating this hypothesis. These findings have implications for the development of substrate-specific clay catalysts, where the composition and configuration of exchangeable cations can be matched to a particular substrate or reaction.
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Affiliation(s)
- Philip J Wallis
- Centre for Green Chemistry, Monash University, Clayton, Victoria 3800, Australia.
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Rusch B, Hanna K, Humbert B. Coating of quartz silica with iron oxides: Characterization and surface reactivity of iron coating phases. Colloids Surf A Physicochem Eng Asp 2010. [DOI: 10.1016/j.colsurfa.2009.11.009] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Salles F, Douillard JM, Denoyel R, Bildstein O, Jullien M, Beurroies I, Van Damme H. Hydration sequence of swelling clays: evolutions of specific surface area and hydration energy. J Colloid Interface Sci 2009; 333:510-22. [PMID: 19303602 DOI: 10.1016/j.jcis.2009.02.018] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2008] [Accepted: 02/06/2009] [Indexed: 11/12/2022]
Abstract
In order to identify the key steps and the driving force for the hydration process of swelling clays, the water adsorption isotherms and enthalpies were measured on monoionic montmorillonite samples saturated with alkali or calcium ions, and on bi-ionic samples saturated with a sodium-calcium mixture. The specific surface area evolution along the hydration process was determined using a recent interpretation of the experimental adsorption isotherms of swelling solids. Results are interpreted in structural terms. Compared with additional data from sample-controlled thermal analysis (SCTA), the results confirm experimentally that the hydration of Li- and Na-montmorillonite is mainly a cation-controlled process, in contrast with the hydration of Cs samples in which the cation contribution to hydration is negligible, as we have already demonstrated using electrostatic calculations or conductivity measurements.
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Affiliation(s)
- Fabrice Salles
- CEA, DEN, SMTM/Laboratoire de Modélisation des Transferts dans l'Environnement, Cadarache, F-13108 Saint-Paul-lez-Durance, France
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Geysermans P, Noguera C. Advances in atomistic simulations of mineral surfaces. ACTA ACUST UNITED AC 2009. [DOI: 10.1039/b903642c] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Marry V, Rotenberg B, Turq P. Structure and dynamics of water at a clay surface from molecular dynamics simulation. Phys Chem Chem Phys 2008; 10:4802-13. [DOI: 10.1039/b807288d] [Citation(s) in RCA: 175] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Lantenois S, Nedellec Y, Prélot B, Zajac J, Muller F, Douillard JM. Thermodynamic assessment of the variation of the surface areas of two synthetic swelling clays during adsorption of water. J Colloid Interface Sci 2007; 316:1003-11. [PMID: 17884066 DOI: 10.1016/j.jcis.2007.07.024] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2007] [Revised: 07/12/2007] [Accepted: 07/12/2007] [Indexed: 11/16/2022]
Abstract
Two synthetic smectites (montmorillonite and beidellite) are studied by a water adsorption technique in order to assess their specific surface areas under atmospheric conditions. A route recently proposed for extracting the thermodynamic data from experimental adsorption isotherms is used. The variation of the specific surface area during water adsorption is obtained, which can be linked to the enlargement of the interlayer space determined using X-ray diffraction. This variation is compared to an idealized specific surface area obtained from TEM and X-ray measurements in agreement with crystallographic models. All these results are also compared with those obtained previously for a natural montmorillonite. A simple view of swelling is proposed.
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Affiliation(s)
- S Lantenois
- Institut Charles Gerhardt, AIME (Agrégats, Interfaces et Matériaux pour l'Energie), CNRS, Université Montpellier 2, UMR 5253, CC 015, Place Eugène Bataillon, 34095 Montpellier Cedex 5, France
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Aluminosilicate surface energy and its evolution upon adsorption using dielectric relaxation spectroscopy. Chem Phys Lett 2006. [DOI: 10.1016/j.cplett.2006.03.032] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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