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Fu B, Espinosa-Marzal RM. Interfacial processes underlying the temperature-dependence of friction and wear of calcite single crystals. J Colloid Interface Sci 2024; 664:561-572. [PMID: 38484525 DOI: 10.1016/j.jcis.2024.03.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2024] [Revised: 03/04/2024] [Accepted: 03/05/2024] [Indexed: 04/07/2024]
Abstract
HYPOTHESIS This study posits that thermal effects play a substantial role in influencing interfacial processes on calcite, and consequently impacting its mechanochemical properties. EXPERIMENTS This work interrogates the temperature-dependence of friction and wear at nanoscale contacts with calcite single crystals at low air humidity (≤ 3-10 % RH) by AFM. FINDINGS Three logarithmic regimes for the velocity-dependence of friction are identified. BelowTc ∼ 70 °C, where friction increases with T, there is a transition from velocity-weakening (W1) to velocity-strengthening friction (S1). AboveTc ∼ 70 °C, where friction decreases with T, a second velocity-strengthening friction regime (S0) precedes velocity-weakening friction (W1). The low humidity is sufficient to induce atomic scale changes of the calcite cleavage plane due to dissolution-reprecipitation, and more so at higher temperature and 10 % RH. Meanwhile, the surface softens above Tc -likely owing to lattice dilation, hydration and amorphization. These interfacial changes influence the wear mechanism, which transitions from pit formation to plowing with increase in temperature. Furthermore, the softening of the surface justifies the appearance of the second velocity-strengthening friction regime (S0). These findings advance our understanding of the influence of temperature on the interfacial and mechanochemical processes involving calcite, with implications in natural processes and industrial manufacturing.
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Affiliation(s)
- Binxin Fu
- Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, 205 N. Matthews Avenue, Urbana, IL 61801, United States
| | - Rosa M Espinosa-Marzal
- Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, 205 N. Matthews Avenue, Urbana, IL 61801, United States; Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, 1304 W. Green St., IL 618101, United States.
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2
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Claesson PM, Wojas NA, Corkery R, Dedinaite A, Schoelkopf J, Tyrode E. The dynamic nature of natural and fatty acid modified calcite surfaces. Phys Chem Chem Phys 2024; 26:2780-2805. [PMID: 38193529 DOI: 10.1039/d3cp04432g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2024]
Abstract
Calcium carbonate, particularly in the form of calcite, is an abundant mineral widely used in both human-made products and biological systems. The calcite surface possesses a high surface energy, making it susceptible to the adsorption of organic contaminants. Moreover, the surface is also reactive towards a range of chemicals, including water. Consequently, studying and maintaining a clean and stable calcite surface is only possible under ultrahigh vacuum conditions and for limited amounts of time. When exposed to air or solution, the calcite surface undergoes rapid transformations, demanding a comprehensive understanding of the properties of calcite surfaces in different environments. Similarly, attention must also be directed towards the kinetics of changes, whether induced by fluctuating environments or at constant condition. All these aspects are encompassed in the expression "dynamic nature", and are of crucial importance in the context of the diverse applications of calcite. In many instances, the calcite surface is modified by adsorption of fatty acids to impart a desired nonpolar character. Although the binding between carboxylic acid groups and calcite surfaces is strong, the fatty acid layer used for surface modification undergoes significant alterations when exposed to water vapour and liquid water droplets. Therefore, it is also crucial to understand the dynamic nature of the adsorbed layer. This review article provides a comprehensive overview of the current understanding of both the dynamics of the calcite surface as well as when modified by fatty acid surface treatments.
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Affiliation(s)
- Per M Claesson
- KTH Royal Institute of Technology, Department of Chemistry, Division of Surface and Corrosion Science, Teknikringen 29, SE-100 44 Stockholm, Sweden.
| | - Natalia A Wojas
- RISE Research Institutes of Sweden, Division of Bioeconomy and Health - Material and Surface Design, Drottning Kristinas väg 61B, SE-114 28 Stockholm, Sweden
| | - Robert Corkery
- KTH Royal Institute of Technology, Department of Chemistry, Division of Surface and Corrosion Science, Teknikringen 29, SE-100 44 Stockholm, Sweden.
| | - Andra Dedinaite
- KTH Royal Institute of Technology, School of Engineering Sciences in Chemistry, Biotechnology and Health, Engineering Pedagogics, SE-100 44 Stockholm, Sweden
- RISE Research Institutes of Sweden, Division Bioeconomy and Health, Department Chemical Process and Pharmaceutical Development, Box 5604, SE-114 86 Stockholm, Sweden
| | | | - Eric Tyrode
- KTH Royal Institute of Technology, Department of Chemistry, Division of Surface and Corrosion Science, Teknikringen 29, SE-100 44 Stockholm, Sweden.
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Guo D, Zhang LH, Li XG, Yang X, Zhao YL, Chen X. Effect of the Water Content on the Adsorption of CO 2 and CH 4 in Calcite Slit Nanopores: Insights from GCMC, MD, and DFT. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:818-826. [PMID: 38146702 DOI: 10.1021/acs.langmuir.3c03011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2023]
Abstract
It is significant to understand the adsorption mechanisms of shale gas (CH4) and CO2 in shale formations to enhance CH4 recovery rates and enable geological CO2 storage. This study provides a comprehensive investigation into the adsorption behaviors of CO2 and CH4 within dry and hydrous calcite nanopores, utilizing a combination of grand canonical Monte Carlo simulations, molecular dynamics simulations, and density functional theory calculations. In dry calcite slits, the calculated results for the adsorption capacity, density profile, and isosteric heat of CO2 and CH4 reveal that CO2 possesses a stronger adsorption affinity, making it preferentially adsorb on the pore surface compared to CH4. In hydrous calcite slits, calculating the adsorption capacity and density profile of CO2 and CH4, the results show that the gas adsorption sites become progressively occupied by H2O molecules, leading to a substantial decrease in the adsorption capacity of CO2 and CH4. Furthermore, by analysis of the adsorption energy and electronic structure, the reason for the reduction of gas adsorption capacity caused by H2O is further revealed. This work has a deep understanding of the adsorption mechanisms of shale gas and CO2 in calcite and can offer valuable theoretical insights for the development of a CO2-enhanced shale gas recovery technology.
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Affiliation(s)
- Detang Guo
- Center for Computational Chemistry and Molecular Simulation, College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China
| | - Lie-Hui Zhang
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China
| | - Xiao-Gang Li
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China
| | - Xu Yang
- Center for Computational Chemistry and Molecular Simulation, College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China
| | - Yu-Long Zhao
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China
| | - Xin Chen
- Center for Computational Chemistry and Molecular Simulation, College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China
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4
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Zarzycki P. Distance-dependent dielectric constant at the calcite/electrolyte interface: Implication for surface complexation modeling. J Colloid Interface Sci 2023; 645:752-764. [PMID: 37172485 DOI: 10.1016/j.jcis.2023.04.169] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 04/10/2023] [Accepted: 04/30/2023] [Indexed: 05/15/2023]
Abstract
HYPOTHESIS The electrical double layer formed at the mineral/electrolyte interface is often modeled using mean-field approaches based on a continuum description of the solvent whose dielectric constant is assumed to decrease monotonically with decreasing distance to the surface. In contrast, molecular simulations show that the solvent polarizability oscillates near the surface similar to the water density profile - as shown previously, for example, by Bonthuis et al. (D.J. Bonthuis, S. Gekle, R.R. Netz, Dielectric Profile of Interfacial Water and its Effect on Double-Layer Capacitance, Phys Rev Lett 107(16) (2011) 166102). We showed that molecular and mesoscale pictures agree by spatially averaging the dielectric constant obtained from molecular dynamics simulations over the distances relevant to the mean-field representation. In addition, the values of capacitances used to describe the electrical double layer in Surface Complexation Models (SCMs) of the mineral/electrolyte interface can be estimated using molecularly informed spatially averaged dielectric constants and positions of hydration layers. EXPERIMENTS First, we used molecular dynamics simulations to model the calcite 101¯4/electrolyte interface. Next, by using atomistic trajectories, we calculated the distance-dependent static dielectric constant and water density in the direction normal to the. Finally, we applied spatial compartmentalization consistent with the model of parallel-plate capacitors connected in series to estimate SCM capacitances. FINDINGS Computationally expensive simulations are required to determine the dielectric constant profile of interfacial water near the mineral surface. On the other hand, water density profiles are readily assessable from much shorter simulation trajectories. Our simulations confirmed that dielectric and water density oscillations at the interface are correlated. Here, we parametrized linear regression models to estimate the dielectric constant directly from the local water density. This is a significant computational shortcut compared to slowly converging calculations relying on total dipole moment fluctuations. The amplitude of the interfacial dielectric constant oscillation can exceed the dielectric constant of the bulk water, suggesting an ice-like frozen state, but only if there are no electrolyte ions. The interfacial accumulation of electrolyte ions causes a decrease in the dielectric constant due to the reduction of water density and re-orientation of water dipoles in ion hydration shells. Finally, we show how to use the computed dielectric properties to estimate SCM's capacitances.
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Affiliation(s)
- Piotr Zarzycki
- Energy Geosciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA, United States.
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5
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Prange MP, Mergelsberg ST, Kerisit SN. Structural water in amorphous carbonate minerals: ab initio molecular dynamics simulations of X-ray pair distribution experiments. Phys Chem Chem Phys 2023; 25:6768-6779. [PMID: 36789518 DOI: 10.1039/d2cp04881g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
Water is known to play a controlling role in directing mineralization pathways and stabilizing metastable amorphous intermediates in hydrous carbonate mineral MCO3·nH2O systems, where M2+ is a divalent metal cation. Despite this recognition, the nature of the controls on crystallization is poorly understood, largely owing to the difficulty in characterizing the dynamically disordered structures of amorphous intermediates at the atomic scale. Here, we present a series of atomistic models, derived from ab initio molecular dynamics simulation, across a range of experimentally relevant cations (M = Ca, Mg, Sr) and hydration levels (0 ≤ n ≤ 2). Theoretical simulations of the dependence of the X-ray pair distribution function on the hydration level n show good agreement with available experimental data and thus provide further evidence for a lack of significant nanoscale structure in amorphous carbonates. Upon dehydration, the metal coordination number does not change significantly, but the relative extent of water dissociation increases, indicating that a thermodynamic driving force exists for water dissociation to accompany dehydration. Mg strongly favors monodentate conformation of carbonate ligands and shows a marked preference to exchange monodentate carbonate O for water O upon hydration, whereas Ca and Sr exchange mono- and bidentate carbonate ligands with comparable frequency. Water forms an extensive hydrogen bond network among both water and carbonate groups that exhibits frequent proton transfers for all three cations considered suggesting that proton mobility is likely predominantly due to water dissociation and proton transfer reactions rather than molecular water diffusion.
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Affiliation(s)
- Micah P Prange
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington, 99352, USA.
| | - Sebastian T Mergelsberg
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington, 99352, USA.
| | - Sebastien N Kerisit
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington, 99352, USA.
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6
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Silvestri A, Raiteri P, Gale JD. Obtaining Consistent Free Energies for Ion Binding at Surfaces from Solution: Pathways versus Alchemy for Determining Kink Site Stability. J Chem Theory Comput 2022; 18:5901-5919. [PMID: 36073829 DOI: 10.1021/acs.jctc.2c00787] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Ion incorporation or removal from a solid at the interface with solution is a fundamental part of crystal growth. Despite this, there have been few quantitative determinations of the thermodynamics for such processes from atomistic molecular dynamics due to the associated technical challenges. In this study, we compute the free energies for ion removal from kink sites at the interface between NaCl and water as an illustrative example. To examine the influence of the free energy technique used, we compare methods that follow an explicit pathway for dissolution with those that focus on the thermodynamics of the initial and final states using metadynamics and free energy perturbation, respectively. While the initial results of the two approaches are found to be completely different, it is demonstrated that the thermodynamics can be reconciled with appropriate corrections for the standard states, thus illustrating the need for caution in interpreting raw free energy curves for ion binding as widely found in the literature. In addition, a new efficient approach is introduced to correct for the system size dependence of kink site energies both due to the periodic interaction of charges in an inhomogeneous dielectric system and due to the dipolar interactions between pairs of kinks along a row. Ultimately, it is shown that with suitable care, both classes of free energy techniques are capable of producing kink site stabilities that are consistent with the solubility of the underlying bulk solid. However, the precise values for individual kink sites exhibit a small systematic offset, which can be ascribed to the contribution of the interfacial potential to the pathway-based results. For the case of NaCl, the free energies of the kink sites relative to a 1 M aqueous solution for Na+ and Cl- are found to be surprisingly different and of opposite sign, despite the ions having very similar hydration free energies.
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Affiliation(s)
- Alessandro Silvestri
- Curtin Institute for Computation, School of Molecular and Life Sciences, Curtin University, P.O. Box U1987, Perth, Western Australia 6845, Australia
| | - Paolo Raiteri
- Curtin Institute for Computation, School of Molecular and Life Sciences, Curtin University, P.O. Box U1987, Perth, Western Australia 6845, Australia
| | - Julian D Gale
- Curtin Institute for Computation, School of Molecular and Life Sciences, Curtin University, P.O. Box U1987, Perth, Western Australia 6845, Australia
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7
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Pavlov S, Danilova V, Sivakov V, Kislenko S. The effect of a mixture of an ionic liquid and organic solvent on oxygen reduction reaction kinetics. Phys Chem Chem Phys 2022; 24:16746-16754. [PMID: 35771039 DOI: 10.1039/d2cp00698g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Li-O2 batteries attract great attention due to their promising theoretical energy density. One of the main obstacles on the way to achieving high energy density and good cyclability is positive electrode passivation by the Li2O2 discharge product as well as the presence of parasitic reactions that degrade electrode and electrolyte materials. To overcome these issues new electrolytes are being extensively searched for to ensure the bulk-mediated mechanism of the oxygen reduction reaction and inhibition of parasitic reactions. Different additives to organic solvents can significantly change the properties of electrolytes. This work is devoted to the effect of ionic liquids (ILs), which are proposed as an additive to the solvent due to their excellent solvation properties, high stability, low volatility and flammability. Using molecular dynamics simulations we investigate mixtures of the Pyr14TFSI ionic liquid and dimethoxyethane (DME) with different volume fractions of the IL. Our calculations show that the presence of the ionic liquid in the electrolyte stabilises solvation shells around the ions, both involved in the oxygen reduction and parasitic reactions, slowing down the kinetics of Li+ and O2- association. This makes the usage of such mixtures promising for electrolyte design for Li-O2 batteries.
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Affiliation(s)
- Sergey Pavlov
- Joint Institute for High Temperatures of RAS, Izhorskaya 13/2, 125412 Moscow, Russian Federation. .,Skolkovo Institute of Science and Technology, Skolkovo Innovation Center, Nobel St. 3, Moscow, 143026, Russian Federation
| | - Valentina Danilova
- Joint Institute for High Temperatures of RAS, Izhorskaya 13/2, 125412 Moscow, Russian Federation.
| | - Vyacheslav Sivakov
- Joint Institute for High Temperatures of RAS, Izhorskaya 13/2, 125412 Moscow, Russian Federation.
| | - Sergey Kislenko
- Joint Institute for High Temperatures of RAS, Izhorskaya 13/2, 125412 Moscow, Russian Federation.
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8
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Yeandel S, Freeman C, Harding J. A General Method for Calculating Solid/Liquid Interfacial Free Energies from Atomistic Simulations: Application to CaSO 4.xH 2O. J Chem Phys 2022; 157:084117. [DOI: 10.1063/5.0095130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We present a general method for computing interfacial free energies from atomistic simulations, which is particularly suitable for solid/liquid interfaces. Our method uses an Einstein crystal as a universal reference state and is more flexible than previous approaches. Surfaces with dipoles, complex reconstructions, and partially dissolved species are all easily accommodated within the framework. It may also be extended to calculating the relative free energies of different phases and other types of defect. We have applied our method to interfaces of bassanite and gypsum with water and obtained interfacial free energies of the order of 0.15 J/m2, of which approximately 50 % is due to entropic contributions. Our calculations of the interfacial free energy of NaCl with water obtained a value of 0.13 J/m2 of which only 19 % is from entropic contributions. We have also predicted equilibrium morphologies for bassanite and gypsum that compare well with experiments and previous calculations.
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Affiliation(s)
- Stephen Yeandel
- Materials Science and Engineering, The University of Sheffield Department of Materials Science and Engineering, United Kingdom
| | - Colin Freeman
- Materials Science and Engineering, University of Sheffield, United Kingdom
| | - John Harding
- Materials Science and Engineering, University of Sheffield Department of Materials Science and Engineering, United Kingdom
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9
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Bonto M, Eftekhari AA, Nick HM. Electrokinetic behavior of artificial and natural calcites: A review of experimental measurements and surface complexation models. Adv Colloid Interface Sci 2022; 301:102600. [PMID: 35065336 DOI: 10.1016/j.cis.2022.102600] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2021] [Revised: 01/06/2022] [Accepted: 01/09/2022] [Indexed: 11/28/2022]
Abstract
The surface charge of calcite in aqueous environments is essential to many industrial and environmental applications. Electrokinetic measurements are usually used to assess the calcite charging behavior and characterize its electrical double layer (EDL). Numerous surface complexation models (SCMs) have been proposed to interpret the effect of different surface interactions on the zeta potential. Because of their versatility, SCMs have also become important tools in reactive transport modeling. The research on enhanced oil recovery within the last decade has led to an increased number of publications reporting both zeta potential measurements and SCMs for calcite. Nonetheless, the measurements are often inconsistent and the reasons for choosing one model over another are unclear. In this work, we review the models proposed for calcite and address their main differences. We first collect a large number of published zeta potential measurements and then we fit a Diffuse Layer, Basic Stern, and Charge-Distribution Multi-Site Complexation models to a selected reliable dataset. For each model, we maintain a similar number of adjustable parameters. After optimizing the parameters of the models, we systematically compare their prediction capabilities against data obtained in monovalent and divalent electrolyte systems containing calcium, magnesium, sulfate, or carbonate. We show that, often, the discrepancies between the models and the experimental data can be explained by different levels of disequilibrium. Nonetheless, assumptions used in the development of the models may significantly reduce their extrapolability to variable chemical conditions. The poor agreement between the models tuned to electrokinetic data with surface charge measurements and dynamic retention from single-phase flowthrough tests show that zeta potential may not be the best type of data to characterize ion binding at the calcite surface. Including the effect of mineral impurities and temperature on the calcite surface speciation and electrokinetic behavior prevail as main challenges for reactive transport modeling.
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Affiliation(s)
- María Bonto
- Danish Hydrocarbon Research and Technology Centre, Technical University of Denmark, Kgs. Lyngby, 2800, Denmark.
| | - Ali A Eftekhari
- Danish Hydrocarbon Research and Technology Centre, Technical University of Denmark, Kgs. Lyngby, 2800, Denmark
| | - Hamidreza M Nick
- Danish Hydrocarbon Research and Technology Centre, Technical University of Denmark, Kgs. Lyngby, 2800, Denmark
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10
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Lu J, Ruan S, Liu Y, Wang T, Zeng Q, Yan D. Morphological characteristics of calcium carbonate crystallization in CO 2 pre-cured aerated concrete. RSC Adv 2022; 12:14610-14620. [PMID: 35702215 PMCID: PMC9105646 DOI: 10.1039/d2ra01901a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Accepted: 05/08/2022] [Indexed: 01/28/2023] Open
Abstract
Early-stage CO2 curing technology for alkaline construction materials (such as cement concrete) has gained increasing interest owing to the advantages of material properties improvement and high potential of CO2 sinking. Less attention, however, has been paid to morphological characteristics of CaCO3 in carbonated cement concrete. The crystal structure and micromorphology of CaCO3 in an early-age aerated concrete (AC) cured under CO2 gas pressures of 0.1, 1, and 2 bar were investigated. The fabricated AC has a high CO2 sorption capacity (∼35 g CO2 per 100 g cement in a 100 mm cube). The morphological characteristics of CaCO3 were statistically analyzed in terms of long-axis length (b), short-axis length (a), and aspect ratio (K = b/a). As CO2 pressure increases, b is almost unchanged from 0.8–1.8 μm, a decreases from 0.7 to 0.4 μm, and, consequently, K increases from 1.3 to 2.5. The different CaCO3 crystal morphologies in AC are ascribed to the CO2 pressure-associated crystal transformation processes: low gas pressure induces a symmetric CaCO3 growth, while high gas pressure causes a faster calcite growth at the crystal tip ends. The findings would deepen the understanding of CaCO3 crystal formation under different CO2 curing pressures for tuning the microstructure of CO2-cured cement concrete. The work reports different morphological characteristics of CaCO3 formed in an early-age aerated concrete (AC) under different CO2 pressures, uncovering the physicochemical mechanisms of carbonation of cement-based materials affected by CO2 curing.![]()
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Affiliation(s)
- Jiayu Lu
- College of Civil Engineering and Architecture, Zhejiang University, 866 Yuhangtang Road, Hangzhou, Zhejiang, 310058, China
| | - Shengqian Ruan
- College of Civil Engineering and Architecture, Zhejiang University, 866 Yuhangtang Road, Hangzhou, Zhejiang, 310058, China
| | - Yi Liu
- Institute for Composites Science Innovation (InCSI), School of Materials Science and Engineering, Zhejiang University, 38 Zheda Road, Hangzhou, Zhejiang, 310027, China
| | - Tao Wang
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, 38 Zheda Road, Hangzhou, Zhejiang, 310027, China
| | - Qiang Zeng
- College of Civil Engineering and Architecture, Zhejiang University, 866 Yuhangtang Road, Hangzhou, Zhejiang, 310058, China
| | - Dongming Yan
- College of Civil Engineering and Architecture, Zhejiang University, 866 Yuhangtang Road, Hangzhou, Zhejiang, 310058, China
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11
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Allers JP, Priest CW, Greathouse JA, Alam TM. Using Computationally-Determined Properties for Machine Learning Prediction of Self-Diffusion Coefficients in Pure Liquids. J Phys Chem B 2021; 125:12990-13002. [PMID: 34793167 DOI: 10.1021/acs.jpcb.1c07092] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The ability to predict transport properties of liquids quickly and accurately will greatly improve our understanding of fluid properties both in bulk and complex mixtures, as well as in confined environments. Such information could then be used in the design of materials and processes for applications ranging from energy production and storage to manufacturing processes. As a first step, we consider the use of machine learning (ML) methods to predict the diffusion properties of pure liquids. Recent results have shown that Artificial Neural Networks (ANNs) can effectively predict the diffusion of pure compounds based on the use of experimental properties as the model inputs. In the current study, a similar ANN approach is applied to modeling diffusion of pure liquids using fluid properties obtained exclusively from molecular simulations. A diverse set of 102 pure liquids is considered, ranging from small polar molecules (e.g., water) to large nonpolar molecules (e.g., octane). Self-diffusion coefficients were obtained from classical molecular dynamics (MD) simulations. Since nearly all the molecules are organic compounds, a general set of force field parameters for organic molecules was used. The MD methods are validated by comparing physical and thermodynamic properties with experiment. Computational input features for the ANN include physical properties obtained from the MD simulations as well as molecular properties from quantum calculations of individual molecules. Fluid properties describing the local liquid structure were obtained from center of mass radial distribution functions (COM-RDFs). Feature sensitivity analysis revealed that isothermal compressibility, heat of vaporization, and the thermal expansion coefficient were the most impactful properties used as input for the ANN model to predict the MD simulated self-diffusion coefficients. The MD-based ANN successfully predicts the MD self-diffusion coefficients with only a subset (2 to 3) of the available computationally determined input features required. A separate ANN model was developed using literature experimental self-diffusion coefficients as model targets. Although this second ML model was not as successful due to a limited number of data points, a good correlation is still observed between experimental and ML predicted self-diffusion coefficients.
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Affiliation(s)
- Joshua P Allers
- Department of Organic Materials Science, Sandia National Laboratories, Albuquerque, New Mexico 87185, United States
| | - Chad W Priest
- Geochemistry Department, Sandia National Laboratories, Albuquerque, New Mexico 87185, United States
| | - Jeffery A Greathouse
- Geochemistry Department, Sandia National Laboratories, Albuquerque, New Mexico 87185, United States
| | - Todd M Alam
- Department of Organic Materials Science, Sandia National Laboratories, Albuquerque, New Mexico 87185, United States.,ACC Consulting New Mexico, Cedar Crest, New Mexico 87008, United States
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12
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Zare S, Qomi MJA. Reactive force fields for aqueous and interfacial magnesium carbonate formation. Phys Chem Chem Phys 2021; 23:23106-23123. [PMID: 34617078 DOI: 10.1039/d1cp02627e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
We develop Mg/C/O/H ReaxFF parameter sets for two environments: an aqueous force field for magnesium ions in solution and an interfacial force field for minerals and mineral-water interfaces. Since magnesium is highly ionic, we choose to fix the magnesium charge and model its interaction with C/O/H through Coulomb, Lennard-Jones, and Buckingham potentials. We parameterize the forcefields against several crystal structures, including brucite, magnesite, magnesia, magnesium hydride, and magnesium carbide, as well as Mg2+ water binding energies for the aqueous forcefield. Then, we test the forcefield for other magnesium-containing crystals, solvent separated and contact ion-pairs and single-molecule/multilayer water adsorption energies on mineral surfaces. We also apply the forcefield to the forsterite-water and brucite-water interface that contains a bicarbonate ion. We observe that a long-range proton transfer mechanism deprotonates the bicarbonate ion to carbonate at the interface. Free energy calculations show that carbonate can attach to the magnesium surface with an energy barrier of about 0.22 eV, consistent with the free energy required for aqueous Mg-CO3 ion pairing. Also, the diffusion constant of the hydroxide ions in the water layers formed on the forsterite surface are shown to be anisotropic and heterogeneous. These findings can help explain the experimentally observed fast nucleation and growth of magnesite at low temperature at the mineral-water-CO2 interface in water-poor conditions.
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Affiliation(s)
- Siavash Zare
- Department of Civil and Environmental Engineering, University of California, Irvine, CA, USA.
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13
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Kaewmee P, Hungwe D, Takahashi F. Adsorptive reduction of water hardness by a highly porous and regenerative geopolymer fabricated from coal fly ash waste with low-temperature calcination. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:54594-54607. [PMID: 34018101 DOI: 10.1007/s11356-021-14478-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Accepted: 05/14/2021] [Indexed: 06/12/2023]
Abstract
In this research paper, potassium-activated geopolymer cubes (GeoC) fabricated from waste coal fly ash with low-temperature calcination were investigated as a water softening agent. The GeoC reduced water hardness contents by adsorbing calcium (Ca2+) and magnesium (Mg2+) ions from aqueous solutions. Batch experiments were conducted to investigate the adsorption performance for Ca2+ and Mg2+, including contact time, initial concentration of cations, and interference with competitive cations. The best performance for water hardness adsorption was found on GeoC-35, fabricated with the highest silicate ratio to hydroxide. The adsorption process reached equilibrium after a contact time of 6 h for Ca2+ and 24 h for Mg2+. The maximum adsorption capacity for Ca2+ and Mg2+ was 52.0 and 17.3 mg/g, respectively. Langmuir and pseudo-second-order models fitted the experimental data well, indicating that chemical reactions occurred on a homogeneous surface. The GeoC can also be reused for removing hardness. Furthermore, the increase in potassium and silicon concentration in solution varied directly with removal efficiency, suggesting that the aluminosilicate framework played a role in reducing water hardness via cationic exchange. The presence of competitive cations decreased adsorption ability, albeit it still exhibited an appreciable removal performance.
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Affiliation(s)
- Patcharanat Kaewmee
- Global Engineering Course for Development, Environment, and Society, Tokyo Institute of Technology, G5-601, Suzukake, 4259, Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan.
| | - Douglas Hungwe
- Global Engineering Course for Development, Environment, and Society, Tokyo Institute of Technology, G5-601, Suzukake, 4259, Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan
| | - Fumitake Takahashi
- Global Engineering Course for Development, Environment, and Society, Tokyo Institute of Technology, G5-601, Suzukake, 4259, Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan
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14
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Heberling F, Klačić T, Raiteri P, Gale JD, Eng PJ, Stubbs JE, Gil-Díaz T, Begović T, Lützenkirchen J. Structure and Surface Complexation at the Calcite(104)-Water Interface. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:12403-12413. [PMID: 34478280 DOI: 10.1021/acs.est.1c03578] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Calcite is the most stable polymorph of calcium carbonate (CaCO3) under ambient conditions and is ubiquitous in natural systems. It plays a major role in controlling pH in environmental settings. Electrostatic phenomena at the calcite-water interface and the surface reactivity of calcite in general have important environmental implications. They may strongly impact nutrient and contaminant mobility in soils and other subsurface environments, they control oil recovery from limestone reservoirs, and they may impact the safety of nuclear waste disposal sites. Besides the environmental relevance, the topic is significant for industrial applications and cultural heritage preservation. In this study, the structure of the calcite(104)-water interface is investigated on the basis of a new extensive set of crystal truncation rod data. The results agree with recently reported structures and resolve previous ambiguities with respect to the coordination sphere of surface Ca ions. These structural features are introduced into an electrostatic three-plane surface complexation model, describing ion adsorption and charging at the calcite-water interface. Inner surface potential data for calcite, as measured with a calcite single-crystal electrode, are used as constraints for the model in addition to zeta potential data. Ion adsorption parameters are compared with molecular dynamics simulations. All model parameters, including protonation constants, ion-binding parameters, and Helmholtz capacitances, are within physically and chemically plausible ranges. A PhreeqC version of the model is presented, which we hope will foster application of the model in environmental studies.
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Affiliation(s)
- Frank Heberling
- Institute for Nuclear Waste Disposal, Karlsruhe Institute of Technology, P.O. Box 3640, 76021 Karlsruhe, Germany
| | - Tin Klačić
- Division of Physical Chemistry, Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102A, HR-10000 Zagreb, Croatia
| | - Paolo Raiteri
- Curtin Institute for Computation/The Institute for Geoscience Research, School of Molecular and Life Sciences, Curtin University, P.O. Box U1987 Perth, WA 6845, Australia
| | - Julian D Gale
- Curtin Institute for Computation/The Institute for Geoscience Research, School of Molecular and Life Sciences, Curtin University, P.O. Box U1987 Perth, WA 6845, Australia
| | - Peter J Eng
- Center for Advanced Radiation Sources, The University of Chicago, 5734 South Ellis Avenue, Chicago, Illinois 60637, United States
| | - Joanne E Stubbs
- Center for Advanced Radiation Sources, The University of Chicago, 5734 South Ellis Avenue, Chicago, Illinois 60637, United States
| | - Teba Gil-Díaz
- Institute for Nuclear Waste Disposal, Karlsruhe Institute of Technology, P.O. Box 3640, 76021 Karlsruhe, Germany
- Institute of Geosciences, Friedrich-Schiller-Universität Jena, Burgweg 11, 07749 Jena, Germany
| | - Tajana Begović
- Division of Physical Chemistry, Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102A, HR-10000 Zagreb, Croatia
| | - Johannes Lützenkirchen
- Institute for Nuclear Waste Disposal, Karlsruhe Institute of Technology, P.O. Box 3640, 76021 Karlsruhe, Germany
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15
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Thi Bao Le T, Divine-Ayela C, Striolo A, Cole DR. Effects of surface contamination on the interfacial properties of CO 2/water/calcite systems. Phys Chem Chem Phys 2021; 23:18885-18892. [PMID: 34612426 DOI: 10.1039/d1cp01106e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Understanding the wetting properties of reservoir rocks can be of great benefit for advanced applications such as the effective trapping and geological storage of CO2. Despite their importance, not all mechanisms responsible for wetting mineral surfaces in subsurface environments are well understood. Factors such as temperature, pressure and salinity are often studied, achieving results with little unanimity; other possible factors are left somewhat unexplored. One such factor is the effect of contamination. In the present study, the effects of adding a non-aqueous organic contaminant, ethanol, on the CO2-water interfacial tension (IFT) and the CO2/water/calcite contact angle were investigated using molecular dynamics simulations. Within the conditions studied, relatively small amounts of ethanol cause a significant decrease in the CO2-water IFTs, as well as a pronounced increase in the water-calcite-CO2 three phase contact angle. The latter result is due to the decrease of the IFT between CO2 and water and the strong adsorption of ethanol on the solid substrate. These findings could be helpful for explaining how impurities can affect experimental data and could lead to effective carbon sequestration strategies.
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Affiliation(s)
- Tran Thi Bao Le
- Department of Chemical Engineering, University College London, London WC1E 6BT, UK.
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16
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Liu Q, Zhang X, Jiang B, Li J, Li T, Shao X, Cai W, Wang H, Zhang Y. Molecular Dynamics Simulation of Ion Adsorption and Ligand Exchange on an Orthoclase Surface. ACS OMEGA 2021; 6:14952-14962. [PMID: 34151076 PMCID: PMC8209803 DOI: 10.1021/acsomega.1c00826] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Accepted: 05/26/2021] [Indexed: 05/31/2023]
Abstract
Orthoclase (K-feldspar) is one of the natural inorganic materials, which shows remarkable potential toward removing heavy metal ions from aqueous solutions. Understanding the interactions of the orthoclase and metal ions is important in the treatment of saline wastewater. In this paper, molecular dynamics simulations were used to prove the adsorption of different ions onto orthoclase. The adsorption isotherms show that orthoclase has remarkable efficiency in the removal of cations at low ion concentrations. Aluminol groups are the preferential adsorption sites of cations due to higher negative charges. The adsorption types and adsorption sites are influenced by the valence, radius, and hydration stability of ions. Monovalent cations can be adsorbed in the cavities, whereas divalent cations cannot. The hydrated cation may form an outer-sphere complex or an inner-sphere complex in association with the loss of hydration water. Na+, K+, and Ca2+ ions mainly undergo inner-sphere adsorption and Mg2+ ions prefer outer-sphere adsorption. On the basis of simulation results, the mechanism of ion removal in the presence of orthoclase is demonstrated at a molecular level.
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Affiliation(s)
- Qian Liu
- School
of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
| | - Xuan Zhang
- School
of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
| | - Binbin Jiang
- State
Key Laboratory of Water Resource Protection and Utilization in Coal
Mining, Beijing 100011, China
| | - Jingfeng Li
- State
Key Laboratory of Water Resource Protection and Utilization in Coal
Mining, Beijing 100011, China
| | - Ting Li
- State
Key Laboratory of Water Resource Protection and Utilization in Coal
Mining, Beijing 100011, China
| | - Xianzhen Shao
- Hekou
Oil Production Plant of Shengli Oilfield, Sinopec, Dongying, Shandong 257200, China
| | - Weibin Cai
- School
of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
| | - Hongyuan Wang
- School
of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
| | - Yuankun Zhang
- School
of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
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17
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Koleini MM, Badizad MH, Mahani H, Dastjerdi AM, Ayatollahi S, Ghazanfari MH. Atomistic insight into salinity dependent preferential binding of polar aromatics to calcite/brine interface: implications to low salinity waterflooding. Sci Rep 2021; 11:11967. [PMID: 34099800 PMCID: PMC8184864 DOI: 10.1038/s41598-021-91402-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2020] [Accepted: 05/26/2021] [Indexed: 12/02/2022] Open
Abstract
This paper resolve the salinity-dependent interactions of polar components of crude oil at calcite-brine interface in atomic resolution. Molecular dynamics simulations carried out on the present study showed that ordered water monolayers develop immediate to a calcite substrate in contact with a saline solution. Carboxylic compounds, herein represented by benzoic acid (BA), penetrate into those hydration layers and directly linking to the calcite surface. Through a mechanism termed screening effect, development of hydrogen bonding between –COOH functional groups of BA and carbonate groups is inhibited by formation of a positively-charged Na+ layer over CaCO3 surface. Contrary to the common perception, a sodium-depleted solution potentially intensifies surface adsorption of polar hydrocarbons onto carbonate substrates; thus, shifting wetting characteristic to hydrophobic condition. In the context of enhanced oil recovery, an ion-engineered waterflooding would be more effective than injecting a solely diluted saltwater.
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Affiliation(s)
- Mohammad Mehdi Koleini
- Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran.
| | - Mohammad Hasan Badizad
- Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran
| | - Hassan Mahani
- Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran
| | | | - Shahab Ayatollahi
- Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran
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18
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Fu B, Diao Y, Espinosa-Marzal RM. Nanoscale insight into the relation between pressure solution of calcite and interfacial friction. J Colloid Interface Sci 2021; 601:254-264. [PMID: 34082230 DOI: 10.1016/j.jcis.2021.04.145] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 03/29/2021] [Accepted: 04/30/2021] [Indexed: 02/06/2023]
Abstract
Pressure solution of carbonate-based rocks participates in many geophysical and geochemical processes, but fundamental knowledge of the interfacial processes is still lacking. By concurrently pressing and sliding two single calcite crystals past each other, the pressure solution rate and the friction force between the crystals were concurrently measured in calcium-carbonate saturated water with an extended surface forces apparatus. These studies reveal that both a decrease and an increase in frictional strength can originate from the pressure-solution of calcite single crystals. By conducting nanoscale force measurements with an atomic force microscope, ion specific effects were unveiled at the level of a single asperity. Pressure solution is promoted when the interfacial water layers of calcite remain undisturbed under stress (e.g. with Ca(II)) and the dissolved ions and water lubricate the interface - a phenomenon called pressure-solution facilitated slip. The mechanically induced disruption of the hydration layers of the calcite surface (e.g. with Mg(II) and low Ni(II) concentration) correlates with the more fluid-like and lubricious behavior of the confined fluid in the absence of pressure solution. Charge neutralization of the calcite surface leads to an abrupt change of calcite's hydration layers, which promotes pressure-solution facilitated slip. This work advances the fundamental understanding of physicochemical interactions occurring at confined surfaces of stressed calcite.
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Affiliation(s)
- Binxin Fu
- Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, 205 N. Matthews Avenue, Urbana, IL 61801, United States
| | - Yijue Diao
- Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, 205 N. Matthews Avenue, Urbana, IL 61801, United States
| | - Rosa M Espinosa-Marzal
- Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, 205 N. Matthews Avenue, Urbana, IL 61801, United States; Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, 1304 W. Green St., Urbana, IL 61801, United States.
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19
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First Steps towards Understanding the Non-Linear Impact of Mg on Calcite Solubility: A Molecular Dynamics Study. MINERALS 2021. [DOI: 10.3390/min11040407] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Magnesium (Mg2+) is one of the most common impurities in calcite and is known to have a non-linear impact on the solubility of magnesian calcites. Using molecular dynamics (MD), we observed that Mg2+ impacts overall surface energies, local free energy profiles, interfacial water density, structure and dynamics and, at higher concentrations, it also causes crystal surface deformation. Low Mg concentrations did not alter the overall crystal structure, but stabilised Ca2+ locally and tended to increase the etch pit nucleation energy. As a result, Ca-extraction energies over a wide range of 39 kJ/mol were observed. Calcite surfaces with an island were less stable compared to flat surfaces, and the incorporation of Mg2+ destabilised the island surface further, increasing the surface energy and the calcium extraction energies. In general, Ca2+ is less stable in islands of high Mg2+ concentrations. The local variation in free energies depends on the amount and distance to nearest Mg in addition to local disruption of interfacial water and the flexibility of surface carbonate ions to rotate. The result is a complex interplay of these characteristics that cause variability in local dissolution energies. Taken together, these results illustrate molecular scale processes behind the non-linear impact of Mg2+ concentration on the solubility of magnesium-bearing calcites.
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20
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Dissolved Ca2+ ions adsorption and speciation at calcite-water interfaces: Thermodynamics and spectroscopic studies. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2020.117834] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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21
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El-Mofty S, Patra P, El-Midany A, Somasundaran P. Dissolved Ca2+ ions adsorption and speciation at calcite-water interfaces: Dissolution and zeta potential studies. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2020.117924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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22
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Estes SL, Powell BA. Enthalpy of Uranium Adsorption onto Hematite. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:15004-15012. [PMID: 33166114 DOI: 10.1021/acs.est.0c04429] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The influence of temperature on the adsorption of metal ions at the solid-water interface is often overlooked, despite the important role that adsorption plays in metal-ion fate and transport in the natural environment where temperatures vary widely. Herein, we examine the temperature-dependent adsorption of uranium, a widespread radioactive contaminant, onto the ubiquitous iron oxide, hematite. The multitemperature batch adsorption data and surface complexation models indicate that the adsorption of uranium, as the hexavalent uranyl (UO22+) ion, increases significantly with increasing temperature, with an adsorption enthalpy (ΔHads) of +71 kJ mol-1. We suggest that this endothermic, entropically driven adsorption behavior is linked to reorganization of the uranyl-ion hydration and interfacial water structures upon UVI adsorption at the hematite surface. Overall, this work provides fundamental insight into the thermodynamics driving metal-ion adsorption reactions and provides the specific enthalpy value necessary for improved predictive geochemical modeling of UVI adsorption in the environment.
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Affiliation(s)
- Shanna L Estes
- Department of Environmental Engineering and Earth Sciences, Clemson University, 342 Computer Court, Anderson, South Carolina 29625, United States
| | - Brian A Powell
- Department of Environmental Engineering and Earth Sciences, Clemson University, 342 Computer Court, Anderson, South Carolina 29625, United States
- Department of Chemistry, Clemson University, 219 Hunter Laboratories, Clemson, South Carolina 29634, United States
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23
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Ford LJ, Slater PR, Christie JK, Goddard P. Carbon dioxide and water incorporation mechanisms in SrFeO 3-δ phases: a computational study. Phys Chem Chem Phys 2020; 22:25146-25155. [PMID: 33119007 DOI: 10.1039/d0cp03537h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
With a higher propensity for low temperature synthesis routes along with a move toward lower solid oxide fuel cell operating temperatures, water and carbon dioxide incorporation in strontium ferrite is of importance. Despite this, the mechanisms are not well understood. In this work, classical-potential-based computational techniques are used to determine the favourability of water and CO2 incorporation mechanisms in both SrFeO3-δ and SrFeO2.5. Our studies suggest that intrinsic Frenkel and Schottky type defects are unlikely to form, but that water and carbon dioxide incorporation are favourable in both phases. Water incorporation is likely for both the cubic and brownmillerite phases, with hydroxyl ions preferring to sit on octahedral oxygen sites in both structures, causing slight tilting of the shared octahedra. Interstitial hydroxyl ions are only likely for the brownmillerite phase, where the hydroxyl ions are most stable between adjacent FeO4 tetrahedral chains. Carbon dioxide incorporation via carbonate defects is most favourable when a carbonate molecule exists on an iron site, preferring the iron site with lower oxygen coordination. This involves formation of multiple oxygen vacancies surrounding the iron site, and thus we conclude that carbonate can trap oxygen vacancies.
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Affiliation(s)
- L J Ford
- Department of Materials, Loughborough University, Epinal Way, Loughborough, Leicestershire LE11 3TU, UK.
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24
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Hill AR, Cubillas P, Gebbie-Rayet JT, Trueman M, de Bruyn N, Harthi ZA, Pooley RJS, Attfield MP, Blatov VA, Proserpio DM, Gale JD, Akporiaye D, Arstad B, Anderson MW. CrystalGrower: a generic computer program for Monte Carlo modelling of crystal growth. Chem Sci 2020; 12:1126-1146. [PMID: 34163880 PMCID: PMC8179067 DOI: 10.1039/d0sc05017b] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
A Monte Carlo crystal growth simulation tool, CrystalGrower, is described which is able to simultaneously model both the crystal habit and nanoscopic surface topography of any crystal structure under conditions of variable supersaturation or at equilibrium. This tool has been developed in order to permit the rapid simulation of crystal surface maps generated by scanning probe microscopies in combination with overall crystal habit. As the simulation is based upon a coarse graining at the nanoscopic level features such as crystal rounding at low supersaturation or undersaturation conditions are also faithfully reproduced. CrystalGrower permits the incorporation of screw dislocations with arbitrary Burgers vectors and also the investigation of internal point defects in crystals. The effect of growth modifiers can be addressed by selective poisoning of specific growth sites. The tool is designed for those interested in understanding and controlling the outcome of crystal growth through a deeper comprehension of the key controlling experimental parameters. Generic in silico methodology – CrystalGrower – for simulating crystal habit and nanoscopic surface topology to determine crystallisation free energies.![]()
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Affiliation(s)
- Adam R Hill
- Centre for Nanoporous Materials, School of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - Pablo Cubillas
- Centre for Nanoporous Materials, School of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - James T Gebbie-Rayet
- Centre for Nanoporous Materials, School of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - Mollie Trueman
- Centre for Nanoporous Materials, School of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - Nathan de Bruyn
- Centre for Nanoporous Materials, School of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - Zulaikha Al Harthi
- Centre for Nanoporous Materials, School of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - Rachel J S Pooley
- Centre for Nanoporous Materials, School of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK .,ASTAR, Institute of Materials Research and Engineering Fusionopolis 2 Singapore
| | - Martin P Attfield
- Centre for Nanoporous Materials, School of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - Vladislav A Blatov
- Samara Center for Theoretical Materials Science (SCTMS), Samara State Technical University Molodogvardeyskaya Street 244 Samara 443100 Russia.,Samara Center for Theoretical Materials Science (SCTMS), Samara University Academician Pavlov Street 1 Samara 443011 Russia
| | - Davide M Proserpio
- Samara Center for Theoretical Materials Science (SCTMS), Samara State Technical University Molodogvardeyskaya Street 244 Samara 443100 Russia.,Università degli Studi di Milano, Dipartimento di Chimica Via Camillo Golgi 19 20133 Milano Italy
| | - Julian D Gale
- Curtin Institute for Computation, School of Molecular and Life Sciences, Curtin University GPO Box U1987 Perth Western Australia 6845 Australia
| | | | | | - Michael W Anderson
- Centre for Nanoporous Materials, School of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK .,Curtin Institute for Computation, School of Molecular and Life Sciences, Curtin University GPO Box U1987 Perth Western Australia 6845 Australia
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25
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Kim S, Wang X, Jang J, Eom K, Clegg SL, Park G, Di Tommaso D. Hydrogen-Bond Structure and Low-Frequency Dynamics of Electrolyte Solutions: Hydration Numbers from ab Initio Water Reorientation Dynamics and Dielectric Relaxation Spectroscopy. Chemphyschem 2020; 21:2334-2346. [PMID: 32866322 PMCID: PMC7702081 DOI: 10.1002/cphc.202000498] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 08/31/2020] [Indexed: 11/16/2022]
Abstract
We present an atomistic simulation scheme for the determination of the hydration number (h) of aqueous electrolyte solutions based on the calculation of the water dipole reorientation dynamics. In this methodology, the time evolution of an aqueous electrolyte solution generated from ab initio molecular dynamics simulations is used to compute the reorientation time of different water subpopulations. The value of h is determined by considering whether the reorientation time of the water subpopulations is retarded with respect to bulk-like behavior. The application of this computational protocol to magnesium chloride (MgCl2 ) solutions at different concentrations (0.6-2.8 mol kg-1 ) gives h values in excellent agreement with experimental hydration numbers obtained using GHz-to-THz dielectric relaxation spectroscopy. This methodology is attractive because it is based on a well-defined criterion for the definition of hydration number and provides a link with the molecular-level processes responsible for affecting bulk solution behavior. Analysis of the ab initio molecular dynamics trajectories using radial distribution functions, hydrogen bonding statistics, vibrational density of states, water-water hydrogen bonding lifetimes, and water dipole reorientation reveals that MgCl2 has a considerable influence on the hydrogen bond network compared with bulk water. These effects have been assigned to the specific strong Mg-water interaction rather than the Cl-water interaction.
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Affiliation(s)
- Seonmyeong Kim
- Center for THz-driven Biomedical SystemDepartment of Physics and AstronomySeoul National UniversityGwanak-gu08826South Korea
- Advanced Institutes of Convergence TechnologySeoul National UniversitySuwon-SiGyeonggi-do16229South Korea
| | - Xiangwen Wang
- School of Biological and Chemical SciencesMaterials Research InstituteThomas Young CentreQueen Mary University of LondonMile End RoadLondonE1 4NSUnited Kingdom
| | - Jeongmin Jang
- Center for THz-driven Biomedical SystemDepartment of Physics and AstronomySeoul National UniversityGwanak-gu08826South Korea
- Advanced Institutes of Convergence TechnologySeoul National UniversitySuwon-SiGyeonggi-do16229South Korea
| | - Kihoon Eom
- Center for THz-driven Biomedical SystemDepartment of Physics and AstronomySeoul National UniversityGwanak-gu08826South Korea
- Advanced Institutes of Convergence TechnologySeoul National UniversitySuwon-SiGyeonggi-do16229South Korea
| | - Simon L. Clegg
- School of Environmental SciencesUniversity of East AngliaNorwichNR4 7TJUnited Kingdom
| | - Gun‐Sik Park
- Center for THz-driven Biomedical SystemDepartment of Physics and AstronomySeoul National UniversityGwanak-gu08826South Korea
- Advanced Institutes of Convergence TechnologySeoul National UniversitySuwon-SiGyeonggi-do16229South Korea
| | - Devis Di Tommaso
- School of Biological and Chemical SciencesMaterials Research InstituteThomas Young CentreQueen Mary University of LondonMile End RoadLondonE1 4NSUnited Kingdom
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26
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Wang X, Yang X, Chen H, Yang X, Xu Z. Entropy-Enthalpy Compensation in Peptide Adsorption on Solid Surfaces: Dependence on Surface Hydration. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:10822-10829. [PMID: 32813538 DOI: 10.1021/acs.langmuir.0c01845] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Although protein adsorption at the solid-water interface is of immense importance, understanding the crucial role of the water phase in mediating protein-surface interactions is lacking, particularly due to the lack of fundamental thermodynamic data. Herein, we have performed complicated free energy calculations and successfully extracted the entropy and enthalpy changes of molecular adsorption on solids. Using the gold and graphene as the surface models with distinct affinities to the water phase, we successfully unravel the sharply opposite manners of entropy-enthalpy compensation in driving water and tripeptide adsorptions on two surfaces. Though the thermodynamic features of water adsorption on surface are enthalpically dominated based on the positions of free energy barriers and minima, the favorable entropy term significantly decreases the free energy barrier and further stabilizes the adsorbate at the adsorption site on the graphene surface. For the peptide, the shape of the adsorption free energy profile is jointly determined by the enthalpy and entropy changes, which, however, alternatively act the driving force to promote the peptide adsorption on the Au surface and graphene surface. The distinct structural and dynamic properties of solid-liquid interfaces account for the special role of the interfacial water phase in regulating the competitive relationship between the entropy and enthalpy variations.
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Affiliation(s)
- Xiang Wang
- College of Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Xinmofanmalu 30, Nanjing 210009, China
| | - Xiao Yang
- College of Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Xinmofanmalu 30, Nanjing 210009, China
| | - Huijun Chen
- Obstetrics and Gynecology Department, Zhongnan Hospital of Wuhan University, #169 East Lake Road, Wuchang District, Wuhan 430017, China
| | - Xiaoning Yang
- College of Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Xinmofanmalu 30, Nanjing 210009, China
| | - Zhijun Xu
- College of Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Xinmofanmalu 30, Nanjing 210009, China
- Zhangjiagang Institute of Nanjing Tech University, Jiangfanlu 8, Zhangjiagang 215699, China
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27
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Liu F, Sun D. Ion Distribution and Hydration Structure at Solid-Liquid Interface between NaCl Crystal and Its Solution. ACS OMEGA 2019; 4:18692-18698. [PMID: 31737830 PMCID: PMC6854578 DOI: 10.1021/acsomega.9b02620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Accepted: 10/21/2019] [Indexed: 06/10/2023]
Abstract
The interface structure between NaCl crystal and its solution has been investigated at the saturated concentration of 298 K by molecular dynamics simulations. We have found that there are many fine structures at this complex interface. Near the surface of crystal, most of Na+ only coordinate with water molecules, while almost all Cl- coordinate with Na+ in addition to water molecules. An ion coordinating with more water molecules is farther away from the epitaxial position of lattice. As approaching to the interface, the first hydration shell of ions has the tendency of being ordered, while the orientation of dipole of water molecules in the first hydration shell becomes more disordered than that in the solution. Generally, the first hydration shell of Na+ is less affected by nearest Cl-, whereas the first hydration shell of Cl- is significantly affected by nearest Na+.
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28
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Koskamp J, Ruiz-Hernandez SE, Di Tommaso D, Elena AM, De Leeuw NH, Wolthers M. Reconsidering Calcium Dehydration as the Rate-Determining Step in Calcium Mineral Growth. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2019; 123:26895-26903. [PMID: 31737161 PMCID: PMC6849658 DOI: 10.1021/acs.jpcc.9b06403] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 10/15/2019] [Indexed: 06/10/2023]
Abstract
The dehydration of cations is generally accepted as the rate-limiting step in many processes. Molecular dynamics (MD) can be used to investigate the dynamics of water molecules around cations, and two different methods exist to obtain trajectory-based water dehydration frequencies. Here, these two different post-processing methods (direct method versus survival function) have been implemented to obtain calcium dehydration frequencies from a series of trajectories obtained using a range of accepted force fields. None of the method combinations reproduced the commonly accepted experimental water exchange frequency of 10-8.2 s-1. Instead, our results suggest much faster water dynamics, comparable with more accurate ab initio MD simulations and with experimental values obtained using neutron scattering techniques. We obtained the best agreement using the survival function method to characterize the water dynamics, and we show that different method combinations significantly affect the outcome. Our work strongly suggests that the fast water exchange kinetics around the calcium ions is not rate-limiting for reactions involving dissolved/solvated calcium. Our results further suggest that, for alkali and most of the earth alkali metals, mechanistic rate laws for growth, dissolution, and adsorption, which are based on the principle of rate-limiting cation dehydration, need careful reconsideration.
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Affiliation(s)
- Janou
A. Koskamp
- Department
of Earth Sciences-Geochemistry, Utrecht
University, 3584 CB Utrecht, The Netherlands
| | | | - Devis Di Tommaso
- Materials
Research Institute and School of Biological and Chemical Sciences, Queen Mary University of London, Mile End Road, E1 4NS London, United Kingdom
| | | | - Nora H. De Leeuw
- Department
of Earth Sciences-Geochemistry, Utrecht
University, 3584 CB Utrecht, The Netherlands
- School
of Chemistry, Cardiff University, Main Building Park Place, Cardiff CF10 3AT, United Kingdom
| | - Mariette Wolthers
- Department
of Earth Sciences-Geochemistry, Utrecht
University, 3584 CB Utrecht, The Netherlands
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29
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Olsen R, Leirvik KN, Kvamme B. Adsorption characteristics of glycols on calcite and hematite. AIChE J 2019. [DOI: 10.1002/aic.16728] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Richard Olsen
- Department of Physics and Technology University of Bergen Bergen Norway
| | - Kim N. Leirvik
- Department of Physics and Technology University of Bergen Bergen Norway
| | - Bjørn Kvamme
- Department of Physics and Technology University of Bergen Bergen Norway
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30
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Liu C, Min F, Liu L, Chen J. Hydration properties of alkali and alkaline earth metal ions in aqueous solution: A molecular dynamics study. Chem Phys Lett 2019. [DOI: 10.1016/j.cplett.2019.04.045] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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31
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Biriukov D, Kroutil O, Kabeláč M, Ridley MK, Machesky ML, Předota M. Oxalic Acid Adsorption on Rutile: Molecular Dynamics and ab Initio Calculations. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:7617-7630. [PMID: 31117719 DOI: 10.1021/acs.langmuir.8b03984] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Detailed analysis of the adsorption of oxalic acid ions, that is, oxalate and hydrogenoxalate, on the rutile (110) surface was carried out using molecular dynamics augmented by free energy calculations and supported by ab initio calculations. The predicted adsorption on perfect nonhydroxylated and hydroxylated surfaces with surface charge density from neutral to +0.208 C/m2 corresponding to pH values of about 6 and 3.7, respectively, agrees with experimental adsorption data and charge-distribution multisite ion complexation model predictions obtained using the most favorable surface complexes identified in our simulations. We found that outer-sphere complexes are the most favorable, owing to strong hydrogen binding of oxalic acid ions with surface hydroxyls and physisorbed water. The monodentate complex, the most stable among inner-sphere complexes, was about 15 kJ/mol higher in energy, but separated by a large energy barrier. Other inner-sphere complexes, including some previously suggested in the literature as likely adsorption structures such as bidentate and chelate complexes, were found to be unstable both by classical and by ab initio modeling. Both the surfaces and (hydrogen)oxalate ions were modeled using charges scaled to 75% of the nominal values in accord with the electronic continuum theory and our earlier parameterization of (hydrogen)oxalate ions, which showed that nominal charges exaggerate ion-water interactions.
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Affiliation(s)
| | - Ondřej Kroutil
- Faculty of Chemistry, Materials Research Centre , Brno University of Technology , Purkyňova 118 , 612 00 Brno , Czech Republic
| | | | - Moira K Ridley
- Department of Geosciences , Texas Tech University , Lubbock , Texas 79409-1053 , United States
| | - Michael L Machesky
- Illinois State Water Survey, University of Illinois , 1506 Coral Cove Drive , Champaign , Illinois 61821 , United States
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32
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Han Y, Zhang C, Zhu L, Gao Q, Wu L, Zhang Q, Zhao R. Effect of alternating electromagnetic field and ultrasonic on CaCO3 scale inhibitive performance of EDTMPS. J Taiwan Inst Chem Eng 2019. [DOI: 10.1016/j.jtice.2019.03.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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33
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34
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Mancardi G, Hernandez Tamargo C, Terranova U, de Leeuw NH. Calcium Phosphate Deposition on Planar and Stepped (101) Surfaces of Anatase TiO 2: Introducing an Interatomic Potential for the TiO 2/Ca-PO 4/Water Interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:10144-10152. [PMID: 30059229 DOI: 10.1021/acs.langmuir.8b00984] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Titanium is commonly employed in orthopaedic and dental surgery, owing to its good mechanical properties. The titanium metal is usually passivated by a thin layer of its oxide, and in order to promote its integration with the biological tissue, it is covered by a bioactive material such as calcium phosphate (CaP). Here, we have investigated the deposition of calcium and phosphate species on the anatase phase of titanium dioxide (TiO2) using interatomic potential-based molecular dynamics simulations. We have combined different force fields developed for CaP, TiO2, and water, benchmarking the results against density functional theory calculations. On the basis of our study, we consider that the new parameters can be used successfully to study the nucleation of CaP on realistic anatase and rutile TiO2 nanoparticles, including surface defects.
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Affiliation(s)
- Giulia Mancardi
- Department of Chemistry , University College London , 20 Gordon Street , London WC1H 0AJ , U.K
- School of Chemistry , Cardiff University , Main Building, Park Place , Cardiff , CF10 3AT , U.K
| | | | - Umberto Terranova
- School of Chemistry , Cardiff University , Main Building, Park Place , Cardiff , CF10 3AT , U.K
| | - Nora H de Leeuw
- Department of Chemistry , University College London , 20 Gordon Street , London WC1H 0AJ , U.K
- School of Chemistry , Cardiff University , Main Building, Park Place , Cardiff , CF10 3AT , U.K
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35
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Wei Q, Zhao W, Yang Y, Cui B, Xu Z, Yang X. Method Evaluations for Adsorption Free Energy Calculations at the Solid/Water Interface through Metadynamics, Umbrella Sampling, and Jarzynski's Equality. Chemphyschem 2018; 19:690-702. [DOI: 10.1002/cphc.201701241] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Revised: 12/18/2017] [Indexed: 12/18/2022]
Affiliation(s)
- Qichao Wei
- College of Chemical Engineering; State Key Laboratory of Materials-Oriented Chemical Engineering; Nanjing Tech University; Nanjing 210009 P.R. China
| | - Weilong Zhao
- Department of Polymer Science; University of Akron; Akron OH 44325-3909 USA
| | - Yang Yang
- Department of Chemistry; Haverford College; Haverford PA 19041 USA
| | - Beiliang Cui
- Network Information Center; Nanjing Tech University; Nanjing 210009 P.R. China
| | - Zhijun Xu
- College of Chemical Engineering; State Key Laboratory of Materials-Oriented Chemical Engineering; Nanjing Tech University; Nanjing 210009 P.R. China
| | - Xiaoning Yang
- College of Chemical Engineering; State Key Laboratory of Materials-Oriented Chemical Engineering; Nanjing Tech University; Nanjing 210009 P.R. China
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36
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Abstract
Desolvation barriers are present for solute-solvent exchange events, such as ligand binding to an enzyme active site, during protein folding, and at battery electrodes. For solution-grown crystals, desolvation at kink sites can be the rate-limiting step for growth. However, desolvation and the associated kinetic barriers are poorly understood. In this work, we use rare-event simulation techniques to investigate attachment/detachment events at kink sites of a NaCl crystal in water. We elucidate the desolvation mechanism and present an optimized reaction coordinate, which involves one solute collective variable and one solvent collective variable. The attachment/detachment pathways for Na+ and Cl- are qualitatively similar, with quantitative differences that we attribute to different ion sizes and solvent coordination. The attachment barriers primarily result from kink site desolvation, while detachment barriers largely result from breaking ion-crystal bonds. We compute ion detachment rates from kink sites and compare with results from an independent study. We anticipate that the reaction coordinate and desolvation mechanism identified in this work may be applicable to other alkali halides.
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37
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Budi A, Stipp SLS, Andersson MP. The effect of solvation and temperature on the adsorption of small organic molecules on calcite. Phys Chem Chem Phys 2018; 20:7140-7147. [DOI: 10.1039/c7cp06747j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The effect of multicomponent mixture on small organic molecule adsorption on calcite at nonzero temperature was investigated.
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Affiliation(s)
- A. Budi
- Nano-Science Center
- Department of Chemistry
- University of Copenhagen
- Copenhagen
- Denmark
| | - S. L. S. Stipp
- Nano-Science Center
- Department of Chemistry
- University of Copenhagen
- Copenhagen
- Denmark
| | - M. P. Andersson
- Nano-Science Center
- Department of Chemistry
- University of Copenhagen
- Copenhagen
- Denmark
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38
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Effects of low salinity water on calcite/brine interface: A molecular dynamics simulation study. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2017.10.024] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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39
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Smirnov VS, Kislenko SA. Effect of Solvents on the Behavior of Lithium and Superoxide Ions in Lithium-Oxygen Battery Electrolytes. Chemphyschem 2017; 19:75-81. [DOI: 10.1002/cphc.201700980] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Indexed: 01/01/2023]
Affiliation(s)
- Vladimir S. Smirnov
- Joint Institute for High Temperatures of the; Russian Academy of Sciences; Izhorskaya 13 Bldg 2 Moscow 125412 Russia
- Moscow Institute of Physics and Technology; Institutskiy Pereulok 9 Dolgoprudny, Moscow Region 141700 Russia
| | - Sergey A. Kislenko
- Joint Institute for High Temperatures of the; Russian Academy of Sciences; Izhorskaya 13 Bldg 2 Moscow 125412 Russia
- Moscow Institute of Physics and Technology; Institutskiy Pereulok 9 Dolgoprudny, Moscow Region 141700 Russia
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40
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Ghatee MH, Koleini MM. Bonding, structural and thermodynamic analysis of dissociative adsorption of H 3O + ion onto calcite (101⁻4) surface: CPMD and DFT calculations. J Mol Model 2017; 23:331. [PMID: 29105032 DOI: 10.1007/s00894-017-3499-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2017] [Accepted: 10/09/2017] [Indexed: 11/26/2022]
Abstract
We used density functional theory (DFT) and Car-Parrinello molecular dynamics (CPMD) simulation to investigate the adsorption and bond formation of hydronium ion (H3O+) onto a [Formula: see text] calcite surface. For surface coverage of 25% to 100%, the nature of H3O+ interaction was explored through electron density and energetics in the context of bond critical points. The adsorbate-adsorbent structure was studied by simulation of pair correlation function. The results revealed that dissociation into water molecule(s) and proton(s) complements H3O+ ion(s) adsorbtion. The H2O molecule adsorbs onto the surface via its O atom, and interacts with surface calcium in a closed-shell mode; the H+ ion makes a covalent bond to the surface oxygen while maintaining H-bonding with water. Adsorption energies were diminished by 70-90 kJ mol-1 when Obridge-bonded H+ ions transferred to the Oterminal manually. While dissociative adsorption of H3O+ ions is spontaneous at all surface coverages tested, the free energy was lowest at 75% coverage. Also, protonation of a completely pre-hydrated calcite surface leads to stronger interaction of water molecules with the surface. This unique outlook on hydrating calcite provides specific insights into biomineralization of this mineral, and helps depict further pH consequences in the field of biomaterial adsorption. Graphical abstract Dissociative adsorption of hydronium ion onto the surface of calcite.
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Affiliation(s)
- Mohammad Hadi Ghatee
- Department of Chemistry, Shiraz University, Shiraz, 71946, Iran.
- Sharif Upstream Petroleum Research Institute, School of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran.
- Department of Chemistry, University of Houston, Houston, TX, 77204-5003, USA.
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41
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Alghamdi A, Alotaibi M, Yousef A. Atomistic simulation of calcite interaction with ionic species and oil components in water-flooding. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2017.06.069] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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42
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Wastl DS. Ambient atomic resolution atomic force microscopy with qPlus sensors: Part 1. Microsc Res Tech 2017; 80:50-65. [PMID: 27474417 DOI: 10.1002/jemt.22730] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Accepted: 06/13/2016] [Indexed: 11/08/2022]
Abstract
Atomic force microscopy (AFM) is an enormous tool to observe nature in highest resolution and understand fundamental processes like friction and tribology on the nanoscale. Atomic resolution in highest quality was possible only in well-controlled environments like ultrahigh vacuum (UHV) or controlled buffer environments (liquid conditions) and more specified for long-term high-resolution analysis at low temperatures (∼4 K) in UHV where drift is nearly completely absent. Atomic resolution in these environments is possible and is widely used. However, in uncontrolled environments like air, with all its pollutants and aerosols, unspecified thin liquid films as thin as a single molecular water-layer of 200 pm or thicker condensation films with thicknesses up to hundred nanometer, have been a problem for highest resolution since the invention of the AFM. The goal of true atomic resolution on hydrophilic as well as hydrophobic samples was reached recently. In this manuscript we want to review the concept of ambient AFM with atomic resolution. The reader will be introduced to the phenomenology in ambient conditions and the problems will be explained and analyzed while a method for scan parameter optimization will be explained. Recently developed concepts and techniques how to reach atomic resolution in air and ultra-thin liquid films will be shown and explained in detail, using several examples. Microsc. Res. Tech. 80:50-65, 2017. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Daniel S Wastl
- Department of Nanobiotechnology, Institute for Biophysics, University of Natural Resources and Life Science, Muthgasse 11, Vienna, 1190, Austria.,Institute of Experimental and Applied Physics, University of Regensburg, Universitätsstrasse 31, Regensburg, 93053, Germany
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43
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Mancardi G, Hernandez Tamargo CE, Di Tommaso D, de Leeuw NH. Detection of Posner's clusters during calcium phosphate nucleation: a molecular dynamics study. J Mater Chem B 2017; 5:7274-7284. [DOI: 10.1039/c7tb01199g] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Molecular dynamics simulations of calcium and phosphate ions in water show that Posner-like clusters originate during the aggregation process.
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Affiliation(s)
- Giulia Mancardi
- Department of Chemistry
- University College London
- London WC1H 0AJ
- UK
| | | | - Devis Di Tommaso
- School of Biological and Chemical Sciences
- Queen Mary University of London
- London E1 4NS
- UK
| | - Nora H. de Leeuw
- Department of Chemistry
- University College London
- London WC1H 0AJ
- UK
- School of Chemistry
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44
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Abstract
Little is known about the influence of nanoconfinement on calcium carbonate mineralization. Here, colloidal probe atomic force microscopy is used to confine the calcite-solution interface with a silica microsphere and to measure Derjaguin-Landau-Verwey-Overbeek (DLVO) and non-DLVO forces as a function of the calcium concentration, also after charge reversal of both surfaces occurs. Through the statistical analysis of the oscillatory component of a strong hydration force, the subnanometer interfacial structure of the confined atomically flat calcite is resolved in aqueous solution. By applying a mechanical work, both water and hydrated counterions are squeezed out from the nanoconfined solution, leaving the calcite surface more negatively charged than the analogous unconfined surfaces. Layer size and applied work allow a distinction between the hydration states of the counterions in the Stern layer; we propose counterions to be inner- and outer-sphere calcium ions, with a population of inner-sphere calcium ions larger than on unconfined calcite surfaces. It is also shown that the composition of the nanoconfined solution can be tuned by varying calcium concentration. This is a fundamental study of DLVO and hydration forces, and of their connection, on atomically flat calcite. More broadly, our work scrutinizes the greatly unexplored relation between surface science and confined mineralization, with implications for diverse areas of inquiry, such as nanoconfined biomineralization, CO2 sequestration in porous aquifers, and pressure solution and crystallization in confined hydrosystems.
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45
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Tang M, Cziczo DJ, Grassian VH. Interactions of Water with Mineral Dust Aerosol: Water Adsorption, Hygroscopicity, Cloud Condensation, and Ice Nucleation. Chem Rev 2016; 116:4205-59. [DOI: 10.1021/acs.chemrev.5b00529] [Citation(s) in RCA: 228] [Impact Index Per Article: 28.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mingjin Tang
- Department
of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States
| | - Daniel J. Cziczo
- Department
of Earth, Atmospheric and Planetary Sciences and Civil and Environmental
Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Vicki H. Grassian
- Department
of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States
- Departments
of Chemistry and Biochemistry, Nanoengineering and Scripps Institution
of Oceanography, University of California San Diego, La Jolla, California 92093, United States
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46
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Durán-Álvarez A, Maldonado-Domínguez M, González-Antonio O, Durán-Valencia C, Romero-Ávila M, Barragán-Aroche F, López-Ramírez S. Experimental-Theoretical Approach to the Adsorption Mechanisms for Anionic, Cationic, and Zwitterionic Surfactants at the Calcite-Water Interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:2608-2616. [PMID: 26915667 DOI: 10.1021/acs.langmuir.5b04151] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The adsorption of surfactants (DTAB, SDS, and CAPB) at the calcite-water interface was studied through surface zeta potential measurements and multiscale molecular dynamics. The ground-state polarization of surfactants proved to be a key factor for the observed behavior; correlation was found between adsorption and the hard or soft charge distribution of the amphiphile. SDS exhibits a steep aggregation profile, reaching saturation and showing classic ionic-surfactant behavior. In contrast, DTAB and CAPB featured diversified adsorption profiles, suggesting interplay between supramolecular aggregation and desorption from the solid surface and alleviating charge buildup at the carbonate surface when bulk concentration approaches CMC. This manifests as an adsorption profile with a fast initial step, followed by a metastable plateau and finalizing with a sharp decrease and stabilization of surface charge. Suggesting this competition of equilibria, elicited at the CaCO3 surface, this study provides atomistic insight into the adsorption mechanism for ionic surfactants on calcite, which is in accordance with experimental evidence and which is a relevant criterion for developing enhanced oil recovery processes.
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Affiliation(s)
- Agustín Durán-Álvarez
- Universidad Nacional Autónoma de México , Facultad de Química, Departamento de Ingeniería Química/USIP, Ciudad Universitaria, México, Distrito Federal C.P. 04510, México
- Universidad Nacional Autónoma de México , Facultad de Ingeniería, Departamento de Ingeniería Petrolera, Ciudad Universitaria, México, Distrito Federal C.P. 04510, México
| | - Mauricio Maldonado-Domínguez
- Universidad Nacional Autónoma de México , Facultad de Química, Departamento de Química Orgánica, Ciudad Universitaria, México, Distrito Federal C.P. 04510, México
| | - Oscar González-Antonio
- Universidad Nacional Autónoma de México , Facultad de Química, Departamento de Química Orgánica, Ciudad Universitaria, México, Distrito Federal C.P. 04510, México
| | - Cecilia Durán-Valencia
- Universidad Nacional Autónoma de México , Facultad de Química, Departamento de Ingeniería Química/USIP, Ciudad Universitaria, México, Distrito Federal C.P. 04510, México
| | - Margarita Romero-Ávila
- Universidad Nacional Autónoma de México , Facultad de Química, Departamento de Química Orgánica, Ciudad Universitaria, México, Distrito Federal C.P. 04510, México
| | - Fernando Barragán-Aroche
- Universidad Nacional Autónoma de México , Facultad de Química, Departamento de Ingeniería Química/USIP, Ciudad Universitaria, México, Distrito Federal C.P. 04510, México
| | - Simón López-Ramírez
- Universidad Nacional Autónoma de México , Facultad de Química, Departamento de Ingeniería Química/USIP, Ciudad Universitaria, México, Distrito Federal C.P. 04510, México
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47
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Pavlov SV, Kislenko SA. Effects of carbon surface topography on the electrode/electrolyte interface structure and relevance to Li–air batteries. Phys Chem Chem Phys 2016; 18:30830-30836. [DOI: 10.1039/c6cp05552d] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Carbon surface topography influences the solvent structure at the interface, concentration distribution of reactants (Li+, O2), and their absorption kinetics.
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Affiliation(s)
- S. V. Pavlov
- Joint Institute for High Temperatures of the Russian Academy of Sciences
- Moscow
- Russian Federation
| | - S. A. Kislenko
- Joint Institute for High Temperatures of the Russian Academy of Sciences
- Moscow
- Russian Federation
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48
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Stack AG, Borreguero JM, Prisk TR, Mamontov E, Wang HW, Vlcek L, Wesolowski DJ. Precise determination of water exchanges on a mineral surface. Phys Chem Chem Phys 2016; 18:28819-28828. [DOI: 10.1039/c6cp05836a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Solvent exchanges on solid surfaces and dissolved ions are a fundamental property important for understanding chemical reactions, but the rates of fast exchanges are poorly constrained.
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Affiliation(s)
| | - Jose M. Borreguero
- Neutron Data Analysis & Visualization Division
- Oak Ridge National Laboratory
- USA
| | | | - Eugene Mamontov
- Chemical & Engineering Materials Division
- Oak Ridge National Laboratory
- USA
| | - Hsiu-Wen Wang
- UTK/ORNL Shull Wollan Center
- Oak Ridge National Laboratory
- USA
| | - Lukas Vlcek
- UTK/ORNL Joint Institute for Computational Sciences
- USA
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49
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Sun H, Zhao H, Qi N, Qi X, Zhang K, Sun W, Li Y. Mechanistic insight into the displacement of CH4 by CO2 in calcite slit nanopores: the effect of competitive adsorption. RSC Adv 2016. [DOI: 10.1039/c6ra23456a] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Displacement of residual CH4 by CO2 in calcite slit nanopores owing to the competitive adsorption of CO2 over CH4.
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Affiliation(s)
- Haoyang Sun
- Key Laboratory of Colloid and Interface Chemistry of State Education Ministry
- Shandong University
- Jinan
- P. R. China
| | - Hui Zhao
- Key Laboratory of Colloid and Interface Chemistry of State Education Ministry
- Shandong University
- Jinan
- P. R. China
| | - Na Qi
- Key Laboratory of Colloid and Interface Chemistry of State Education Ministry
- Shandong University
- Jinan
- P. R. China
| | - Xiaoqing Qi
- Key Laboratory of Colloid and Interface Chemistry of State Education Ministry
- Shandong University
- Jinan
- P. R. China
| | - Kai Zhang
- Key Laboratory of Colloid and Interface Chemistry of State Education Ministry
- Shandong University
- Jinan
- P. R. China
| | - Wenchao Sun
- School of Petroleum Engineering
- China University of Petroleum (East China)
- Qingdao
- P. R. China
| | - Ying Li
- Key Laboratory of Colloid and Interface Chemistry of State Education Ministry
- Shandong University
- Jinan
- P. R. China
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Shen Z, Szlufarska I, Brown PE, Xu H. Investigation of the Role of Polysaccharide in the Dolomite Growth at Low Temperature by Using Atomistic Simulations. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:10435-10442. [PMID: 26334253 DOI: 10.1021/acs.langmuir.5b02025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Dehydration of water from surface Mg(2+) is most likely the rate-limiting step in the dolomite growth at low temperature. Here, we investigate the role of polysaccharide in this step using classical molecular dynamics (MD) calculations. Free energy (potential of mean force, PMF) calculations have been performed for water molecules leaving the first two hydration layers above the dolomite (104) surface under the following three conditions: without catalyst, with monosaccharide (mannose), and with oligosaccharide (three units of mannose). MD simulations reveal that there is no obvious effect of monosaccharide in lowering the dehydration barrier for surface Mg(2+). However, we found that there are metastable configurations of oligosaccharide, which can decrease the dehydration barrier of surface Mg(2+) by about 0.7-1.1 kcal/mol. In these configurations, the molecule lies relatively flat on the surface and forms a bridge shape. The hydrophobic space near the surface created by the nonpolar -CH groups of the oligosaccharide in the bridge conformation is the reason for the observed reduction of dehydration barrier.
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Affiliation(s)
- Zhizhang Shen
- NASA Astrobiology Institute, Department of Geoscience, ‡Department of Materials Science and Engineering, and §Materials Science Program, University of Wisconsin-Madison , Madison, Wisconsin 53706, United States
| | - Izabela Szlufarska
- NASA Astrobiology Institute, Department of Geoscience, ‡Department of Materials Science and Engineering, and §Materials Science Program, University of Wisconsin-Madison , Madison, Wisconsin 53706, United States
| | - Philip E Brown
- NASA Astrobiology Institute, Department of Geoscience, ‡Department of Materials Science and Engineering, and §Materials Science Program, University of Wisconsin-Madison , Madison, Wisconsin 53706, United States
| | - Huifang Xu
- NASA Astrobiology Institute, Department of Geoscience, ‡Department of Materials Science and Engineering, and §Materials Science Program, University of Wisconsin-Madison , Madison, Wisconsin 53706, United States
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