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Jabraoui H, Charpentier T, Gin S, Delaye JM, Pollet R. Behaviors of sodium and calcium ions at the borosilicate glass–water interface: Gaining new insights through an ab initio molecular dynamics study. J Chem Phys 2022; 156:134501. [DOI: 10.1063/5.0087390] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We study reactivity and leaching at the calcium sodium borosilicate (CNBS)–water interface by means of a Car–Parrinello ab initio molecular dynamics simulation over a simulation time of 100 ps. With an emphasis on the comparison between the behaviors of Ca2+ and Na+ cations at the CNBS glass–water interface, different mechanism events during the trajectory are revealed, discussed, and correlated with other density functional theory calculations. We show that Na+ ions can be released in solution, while Ca2+ cannot leave the surface of CNBS glass. This release is correlated with the vacancy energy of Ca2+ and Na+ cations. Here, we found that the CNBS structure with the Na+ cation vacancy is energetically more favorable than the structure with the Ca2+ cation vacancy. The calcium adsorption site has been shown to have a greater affinity for water than can be found in the case of the sodium site, demonstrating that affinity may not be considered a major factor controlling the release of cations from the glass to the solution.
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Affiliation(s)
- Hicham Jabraoui
- Université Paris-Saclay, CEA, CNRS, NIMBE, F-91191 Gif-sur-Yvette cedex, France
| | | | - Stéphane Gin
- CEA, DES, ISEC, DE2D, University of Montpellier, Marcoule, F-30207 Bagnols-sur-Ceze, France
| | - Jean-Marc Delaye
- CEA, DES, ISEC, DE2D, University of Montpellier, Marcoule, F-30207 Bagnols-sur-Ceze, France
| | - Rodolphe Pollet
- Université Paris-Saclay, CEA, CNRS, NIMBE, F-91191 Gif-sur-Yvette cedex, France
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Multiscale Computational Simulation of Amorphous Silicates’ Structural, Dielectric, and Vibrational Spectroscopic Properties. MINERALS 2018. [DOI: 10.3390/min8080353] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Silicates are among the most abundant and important inorganic materials, not only in the Earth’s crust, but also in the interstellar medium in the form of micro/nanoparticles or embedded in the matrices of comets, meteorites, and other asteroidal bodies. Although the crystalline phases of silicates are indeed present in nature, amorphous forms are also highly abundant. Here, we report a theoretical investigation of the structural, dielectric, and vibrational properties of the amorphous bulk for forsterite (Mg2SiO4) as a silicate test case by a combined approach of classical molecular dynamics (MD) simulations for structure evolution and periodic quantum mechanical Density Functional Theory (DFT) calculations for electronic structure analysis. Using classical MD based on an empirical partial charge rigid ionic model within a melt-quenching scheme at different temperatures performed with the GULP 4.0 code, amorphous bulk structures for Mg2SiO4 were generated using the crystalline phase as the initial guess. This has been done for bulk structures with three different unit cell sizes, adopting a super-cell approach; that is, 1 × 1 × 2, 2 × 1 × 2, and 2 × 2 × 2. The radial distribution functions indicated a good degree of amorphization of the structures. Periodic B3LYP-geometry optimizations performed with the CRYSTAL14 code on the generated amorphous systems were used to analyze their structure; to calculate their high-frequency dielectric constants (ε∞); and to simulate their IR, Raman, and reflectance spectra, which were compared with the experimental and theoretical crystalline Mg2SiO4. The most significant changes of the physicochemical properties of the amorphous systems compared to the crystalline ones are presented and discussed (e.g., larger deviations in the bond distances and angles, broadening of the IR bands, etc.), which are consistent with their disordered nature. It is also shown that by increasing the unit cell size, the bulk structures present a larger degree of amorphization.
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Presti D, Pedone A, Mancini G, Duce C, Tiné MR, Barone V. Insights into structural and dynamical features of water at halloysite interfaces probed by DFT and classical molecular dynamics simulations. Phys Chem Chem Phys 2016; 18:2164-74. [DOI: 10.1039/c5cp05920h] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Density functional theory calculations and classical molecular dynamics simulations have been used to investigate the structure and dynamics of water molecules on kaolinite surfaces and confined in the interlayer of a halloysite model of nanometric dimension.
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Affiliation(s)
- Davide Presti
- Dipartimento di Scienze Chimiche e Geologiche
- Università di Modena e Reggio-Emilia
- I-41125 Modena
- Italy
| | - Alfonso Pedone
- Dipartimento di Scienze Chimiche e Geologiche
- Università di Modena e Reggio-Emilia
- I-41125 Modena
- Italy
| | | | - Celia Duce
- Dipartimento di Chimica e Chimica Industriale
- Università di Pisa
- Pisa
- Italy
| | - Maria Rosaria Tiné
- Dipartimento di Chimica e Chimica Industriale
- Università di Pisa
- Pisa
- Italy
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Rimola A, Ugliengo P, Sodupe M. Strained ring motif at silica surfaces: A quantum mechanical study of their reactivity towards protic molecules. COMPUT THEOR CHEM 2015. [DOI: 10.1016/j.comptc.2015.10.026] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Berardo E, Corno M, Cormack AN, Ugliengo P, Tilocca A. Probing the fate of interstitial water in bulk bioactive glass by ab initio simulations. RSC Adv 2014. [DOI: 10.1039/c4ra05810k] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The mechanism and effects of the interaction of a water molecule with different sites found in the bulk of 45S5 bioactive glass have been investigated through ab initio simulations.
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Affiliation(s)
- Enrico Berardo
- Department of Chemistry
- University College London
- London WC1H 0AJ, UK
| | - Marta Corno
- Dipartimento di Chimica and NIS (Nanostructured Interfaces and Surfaces)
- Universitá di Torino
- 10125 Torino, Italy
| | | | - Piero Ugliengo
- Dipartimento di Chimica and NIS (Nanostructured Interfaces and Surfaces)
- Universitá di Torino
- 10125 Torino, Italy
| | - Antonio Tilocca
- Department of Chemistry
- University College London
- London WC1H 0AJ, UK
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Tilocca A. Current challenges in atomistic simulations of glasses for biomedical applications. Phys Chem Chem Phys 2014; 16:3874-80. [DOI: 10.1039/c3cp54913e] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Atomic-scale simulations of bioglasses are being used to tackle several challenging aspects, such as new structural markers of bioactivity, ion migration and nanosized samples.
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Affiliation(s)
- Antonio Tilocca
- Department of Chemistry
- University College London
- London WC1H 0AJ, UK
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