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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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2
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Le Bars M, Levard C, Legros S, Vidal V, Fernandez-Martinez A, Michel FM, Thill A, Prelot B, Dublet-Adli G, Borschneck D, Rose J, Doelsch E. Size and Strain of Zinc Sulfide Nanoparticles Altered by Interaction with Organic Molecules. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:16831-16837. [PMID: 36394535 DOI: 10.1021/acs.est.2c05268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Nanosized zinc sulfides (nano-ZnS) have size-dependent and tunable physical and chemical properties that make them useful for a variety of technological applications. For example, structural changes, especially caused by strain, are pronounced in nano-ZnS < 5 nm in size, the size range typical of incidental nano-ZnS that form in the environment. Previous research has shown how natural organic matter impacts the physical properties of nano-ZnS but was mostly focused on their aggregation state. However, the specific organic molecules and the type of functional groups that are most important for controlling the nano-ZnS size and strain remain unclear. This study examined the size-dependent strain of nano-ZnS synthesized in the presence of serine, cysteine, glutathione, histidine, and acetate. Synchrotron total scattering pair distribution function analysis was used to determine the average crystallite size and strain. Among the different organic molecules tested, those containing a thiol group were shown to affect the particle size and size-induced strain most strongly when added during synthesis but significantly reduced the particle strain when added to as-formed nano-ZnS. The same effects are useful to understand the properties and behavior of natural nano-ZnS formed as products of microbial activity, for example, in reducing environments, or of incidental nano-ZnS formed in organic wastes.
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Affiliation(s)
- Maureen Le Bars
- Aix Marseille Univ, CNRS, IRD, INRAE, Coll France, CEREGE, Aix-en-Provence13545, France
- UPR Recyclage et Risque, CIRAD, Montpellier, France
- Recyclage et Risque, Univ. Montpellier, CIRAD, MontpellierF-34398, France
| | - Clément Levard
- Aix Marseille Univ, CNRS, IRD, INRAE, Coll France, CEREGE, Aix-en-Provence13545, France
| | - Samuel Legros
- UPR Recyclage et Risque, CIRAD, Montpellier, France
- Recyclage et Risque, Univ. Montpellier, CIRAD, MontpellierF-34398, France
| | - Vladimir Vidal
- Aix Marseille Univ, CNRS, IRD, INRAE, Coll France, CEREGE, Aix-en-Provence13545, France
| | | | - F Marc Michel
- Department of Geosciences, Virginia Polytechnic Institute and State University, Blacksburg, Virginia24061, United States
| | - Antoine Thill
- NIMBE, UMR 3685 CEA, CNRS, Université Paris-Saclay, CEA Saclay, Gif-sur-Yvette Cedex91191, France
| | | | | | - Daniel Borschneck
- Aix Marseille Univ, CNRS, IRD, INRAE, Coll France, CEREGE, Aix-en-Provence13545, France
| | - Jérôme Rose
- Aix Marseille Univ, CNRS, IRD, INRAE, Coll France, CEREGE, Aix-en-Provence13545, France
| | - Emmanuel Doelsch
- UPR Recyclage et Risque, CIRAD, Montpellier, France
- Recyclage et Risque, Univ. Montpellier, CIRAD, MontpellierF-34398, France
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3
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McPherson IJ, Peruffo M, Unwin PR. Role of Mass Transport in the Deposition, Growth, and Transformation of Calcium Carbonate on Surfaces at High Supersaturation. CRYSTAL GROWTH & DESIGN 2022; 22:4721-4729. [PMID: 35942121 PMCID: PMC9354018 DOI: 10.1021/acs.cgd.1c01505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
We demonstrate how combined in-situ measurements and finite element method modeling can provide new insight into the relative contribution of mass transport to the growth of calcium carbonate on two model surfaces, glass and gold, under high-supersaturation conditions relevant to surface scaling. An impinging jet-radial flow system is used to create a high-supersaturated solution at the inlet of different cells: an optical microscope cell presenting a glass surface for deposition and quartz crystal microbalance (QCM) and in-situ IR spectroscopy cells, both presenting a gold surface. The approach described is quantitative due to the well-defined mass transport, and both time-lapse optical microscopy images and QCM data are analyzed to provide information on the growth kinetics of the calcite crystals. Initially, amorphous calcium carbonate (ACC), formed in solution, dominates the deposition process. At longer times, the growth of calcite is more significant and, on glass, is observed to consume ACC from the surface, leading to surface regions depleted of ACC developing around calcite microcrystals. On Au, the mass increase becomes linear with time in this region. Taken together, these microscopic and macroscopic measurements demonstrate that calcite growth has a significant component of mass transport control at high supersaturation. Finite element method (FEM) simulations of mass-transport-limited crystal growth support the strong mass transport contribution to the growth kinetics and further suggest that the observed growth must be sustained by more than just the Ca2+ and CO3 2- in solution, with dissolution/direct attachment of ACC and/or ion pairs also contributing to the growth process.
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4
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Zhang X, Lea AS, Chaka AM, Loring JS, Mergelsberg ST, Nakouzi E, Qafoku O, De Yoreo JJ, Schaef HT, Rosso KM. In situ imaging of amorphous intermediates during brucite carbonation in supercritical CO 2. NATURE MATERIALS 2022; 21:345-351. [PMID: 34845364 DOI: 10.1038/s41563-021-01154-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Accepted: 10/15/2021] [Indexed: 05/25/2023]
Abstract
Progress in understanding crystallization pathways depends on the ability to unravel relationships between intermediates and final crystalline products at the nanoscale, which is a particular challenge at elevated pressure and temperature. Here we exploit a high-pressure atomic force microscope to directly visualize brucite carbonation in water-bearing supercritical carbon dioxide (scCO2) at 90 bar and 50 °C. On introduction of water-saturated scCO2, in situ visualization revealed initial dissolution followed by nanoparticle nucleation consistent with amorphous magnesium carbonate (AMC) on the surface. This is followed by growth of nesquehonite (MgCO3·3H2O) crystallites. In situ imaging provided direct evidence that the AMC intermediate acts as a seed for crystallization of nesquehonite. In situ infrared and thermogravimetric-mass spectrometry indicate that the stoichiometry of AMC is MgCO3·xH2O (x = 0.5-1.0), while its structure is indicated to be hydromagnesite-like according to density functional theory and X-ray pair distribution function analysis. Our findings thus provide insight for understanding the stability, lifetime and role of amorphous intermediates in natural and synthetic systems.
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Affiliation(s)
- Xin Zhang
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, USA.
| | - Alan S Lea
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA, USA
| | - Anne M Chaka
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, USA
| | - John S Loring
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, USA
| | - Sebastian T Mergelsberg
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, USA
| | - Elias Nakouzi
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, USA
| | - Odeta Qafoku
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA, USA
| | - James J De Yoreo
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, USA
| | - Herbert T Schaef
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, USA.
| | - Kevin M Rosso
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, USA.
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5
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Beauvais ML, Sanchez Monserrate BA, Feng T, Chen R, Liu P, Chupas PJ, Chapman KW. A mixing-flow reactor for time-resolved reaction measurements distributed in space. J Appl Crystallogr 2022. [DOI: 10.1107/s1600576722000620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Probing short-lived reaction species is challenging owing to the need for both high signal-to-noise ratio, which can require long measurement time, and fast time resolution. Here, a novel in situ sample environment is presented that decouples time resolution from measurement time by distributing reaction time over space for the reaction under flow. In the mixing-flow reactor, precursor solutions are mixed at a specific position along the flow path, where the reaction is initiated. As the reaction mixture flows within a reaction capillary, the reaction time increases with distance from the mixing point. A measurement can be taken at a specific distance from the mixing point for as long as is needed to accumulate good statistics without compromising the time resolution of the measurement. Applications of the mixing-flow reactor for pair distribution function measurements of the initial nuclei formed during the hydrolysis of Al3+ at high pH are shown.
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6
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Mergelsberg ST, Dembowski M, Bowden ME, Graham TR, Prange M, Wang HW, Zhang X, Qafoku O, Rosso KM, Pearce CI. Cluster defects in gibbsite nanoplates grown at acidic to neutral pH. NANOSCALE 2021; 13:17373-17385. [PMID: 34713874 DOI: 10.1039/d1nr01615f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Gibbsite [α-Al(OH)3] is the solubility limiting phase for aluminum across a wide pH range, and it is a common mineral phase with many industrial applications. The growth mechanism of this layered-structure material, however, remains incompletely understood. Synthesis of gibbsite at low to circumneutral pH yields nanoplates with substantial interlayer disorder. Here we examine defects in this material in detail, and the effects of recrystallization in highly alkaline sodium hydroxide solution at 80 °C. We employed a multimodal approach, including scanning electron microscopy, magic-angle spinning nuclear magnetic resonance (MAS-NMR), Raman and infrared spectroscopies, X-ray diffraction (XRD), and X-ray total scattering pair distribution function (XPDF) analysis to characterize the ageing of the nanoplates over several days. XRD and XPDF indicate that gibbsite nanoplates precipitated at circumneutral pH contain dense, truncated sheets imparting a local difference in interlayer distance. These interlayer defects appear well described by flat Al13 aluminum hydroxide nanoclusters nearly isostructural with gibbsite sheets present under synthesis conditions and trapped as interlayer inclusions during growth. Ageing at elevated temperature in alkaline solutions gradually improves crystallinity, showing a gradual increase in H-bonding between interlayer OH groups. Between 7 to 8 vol% of the initial gibbsite nanoparticles exhibit this defect, with the majority of differences disappearing after 2-4 hours of recrystallization in alkaline solution. The results not only identify the source of disorder in gibbsite formed under acidic/neutral conditions but also point to a possible cluster-mediated growth mechanism evident through inclusion of relict oligomers with gibbsite-like topology trapped in the interlayer spaces.
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Affiliation(s)
| | - Mateusz Dembowski
- Pacific Northwest national Laboratory, Richland, Washington 99352, USA.
| | - Mark E Bowden
- Pacific Northwest national Laboratory, Richland, Washington 99352, USA.
| | - Trent R Graham
- Pacific Northwest national Laboratory, Richland, Washington 99352, USA.
| | - Micah Prange
- Pacific Northwest national Laboratory, Richland, Washington 99352, USA.
| | - Hsiu-Wen Wang
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Xin Zhang
- Pacific Northwest national Laboratory, Richland, Washington 99352, USA.
| | - Odeta Qafoku
- Pacific Northwest national Laboratory, Richland, Washington 99352, USA.
| | - Kevin M Rosso
- Pacific Northwest national Laboratory, Richland, Washington 99352, USA.
| | - Carolyn I Pearce
- Pacific Northwest national Laboratory, Richland, Washington 99352, USA.
- Washington State University, Pullman, Washington 99164, USA
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7
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Serra-Maia R, Kumar P, Meng AC, Foucher AC, Kang Y, Karki K, Jariwala D, Stach EA. Nanoscale Chemical and Structural Analysis during In Situ Scanning/Transmission Electron Microscopy in Liquids. ACS NANO 2021; 15:10228-10240. [PMID: 34003639 DOI: 10.1021/acsnano.1c02340] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Liquid-cell scanning/transmission electron microscopy (S/TEM) has impacted our understanding of multiple areas of science, most notably nanostructure nucleation and growth and electrochemistry and corrosion. In the case of electrochemistry, the incorporation of electrodes requires the use of silicon nitride membranes to confine the liquid. The combined thickness of the liquid layer and the confining membranes prevents routine atomic-resolution characterization. Here, we show that by performing electrochemical water splitting in situ to generate a gas bubble, we can reduce the thickness of the liquid to a film approximately 30 nm thick that remains covering the sample. The reduced thickness of the liquid allows the acquisition of atomic-scale S/TEM images with chemical and valence analysis through electron energy loss spectroscopy (EELS) and structural analysis through selected area electron diffraction (SAED). This contrasts with a specimen cell entirely filled with liquid, where the broad plasmon peak from the liquid obscures the EELS signal from the sample and induces beam incoherence that impedes SAED analysis. The gas bubble generation is fully reversible, which allows alternating between a full cell and thin-film condition to obtain optimal experimental and analytical conditions, respectively. The methodology developed here can be applied to other scientific techniques, such as X-ray scattering, Raman spectroscopy, and X-ray photoelectron spectroscopy, allowing for a multi-modal, nanoscale understanding of solid-state samples in liquid media.
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Affiliation(s)
- Rui Serra-Maia
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Pawan Kumar
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
- Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Andrew C Meng
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Alexandre C Foucher
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Yijin Kang
- Institute for Sustainability and Energy, Northwestern University, Evanston, Illinois 60208, United States
| | - Khim Karki
- Hummingbird Scientific, USA, Lacey, Washington 98516, United States
| | - Deep Jariwala
- Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Eric A Stach
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
- Laboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
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8
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Gillispie EC, Mergelsberg ST, Varga T, Webb SM, Avalos NM, Snyder MMV, Bourchy A, Asmussen RM, Saslow SA. Competitive TcO 4-, IO 3-, and CrO 42- Incorporation into Ettringite. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:1057-1066. [PMID: 33370096 DOI: 10.1021/acs.est.0c06707] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Ettringite is a naturally occurring mineral found in cementitious matrices that is known for its ability to incorporate environmentally mobile oxyanion contaminants. To better assess this immobilization mechanism for contaminants within cementitious waste forms intended for nuclear waste storage, this work explores how mixed oxyanion contaminants compete for ettringite incorporation and influence the evolving mineralogy. Ettringite was precipitated in the presence of TcO4-, IO3-, and/or CrO42-, known contaminants of concern to nuclear waste treatment, over pre-determined precipitation periods. Solution analyses quantified contaminant removal, and the collected solid was characterized using bulk and microprobe X-ray diffraction coupled with pair distribution function and microprobe X-ray fluorescence analyses. Results suggest that ≥96% IO3- is removed from solution, regardless of ettringite precipitation time or the presence of TcO4- or CrO42-. However, TcO4- removal remained <20%, was not significantly improved with longer ettringite precipitation times, and decreased to zero in the presence of IO3-. When IO3- is co-mingled with CrO42-, calcite and gypsum are formed as secondary mineral phases, which allows for oxyanion partitioning, e.g., IO3- incorporation into ettringite, and CrO42- incorporation into calcite. Results from this work exemplify the importance of competitive immobilization when assessing waste form performance and environmental risk of contaminant release.
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Affiliation(s)
- Elizabeth C Gillispie
- Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Sebastian T Mergelsberg
- Physical and Computational Sciences Directorate, Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Tamas Varga
- Environmental Molecular Sciences Laboratory, Earth and Biological Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Samuel M Webb
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Nancy M Avalos
- Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Michelle M V Snyder
- Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Agathe Bourchy
- Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - R Matthew Asmussen
- Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Sarah A Saslow
- Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
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9
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Graham TR, Dembowski M, Wang HW, Mergelsberg ST, Nienhuis ET, Reynolds JG, Delegard CH, Wei Y, Snyder M, Leavy II, Baum SR, Fountain MS, Clark SB, Rosso KM, Pearce CI. Hydroxide promotes ion pairing in the NaNO 2-NaOH-H 2O system. Phys Chem Chem Phys 2021; 23:112-122. [PMID: 33305779 DOI: 10.1039/d0cp04799f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Nitrite (NO2-) is a prevalent nitrogen oxyanion in environmental and industrial processes, but its behavior in solution, including ion pair formation, is complex. This solution phase complexity impacts industries such as nuclear waste treatment, where NO2- significantly affects the solubility of other constituents present in sodium hydroxide (NaOH)-rich nuclear waste. This work provides molecular scale information into sodium nitrite (NaNO2) and NaOH ion-pairing processes to provide a physical basis for later development of thermodynamic models. Solubility isotherms of NaNO2 in aqueous mixtures with NaOH and total alkalinity were also measured. Spectroscopic characterization of these solutions utilized high-field nuclear magnetic resonance spectroscopy (NMR) and Raman spectroscopy, with additional solution structure detailed by X-ray total scattering pairwise distribution function analysis (X-ray PDF). Despite the NO2- deformation Raman band's insensitivity to added NaOH in saturated NaNO2 solutions, 23Na and 15N NMR studies indicated the Na+ and NO2- chemical environments change likely due to ion pairing. The ion pairing correlates with a decrease in diffusion coefficient of solution species as measured by pulsed field gradient 23Na and 1H NMR. Two-dimensional correlation analyses of the 2800-4000 cm-1 Raman region and X-ray PDF indicated that saturated NaNO2 and NaOH mixtures disrupt the hydrogen network of water into a new structure where the length of the OO correlations is contracted relative to the typical H2O structure. Beyond describing the solubility of NaNO2 in a multicomponent electrolyte mixture, these results also indicate that nitrite exhibits greater ion pairing in mixtures of concentrated NaNO2 and NaOH than in comparable solutions with only NaNO2.
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Affiliation(s)
- Trent R Graham
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA.
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10
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Ustriyana P, Harmon E, Chen K, Michel FM, Sahai N. Oligo(l-glutamic acids) in Calcium Phosphate Precipitation: Chain Length Effect. J Phys Chem B 2020; 124:6278-6287. [PMID: 32600043 DOI: 10.1021/acs.jpcb.0c01689] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The understanding of calcium phosphate precipitation is of major interest in different fields of science, including medicine, biomaterials, and physical chemistry. The presence of additive biomacromolecules has been known to influence various stages of the precipitation process from nucleation to crystal growth. In the current work, well-defined sequences of short, negatively charged peptides, oligo(l-glutamic acids), were utilized as a model, inspired by contiguous sequences of acidic amino acids in natural biomineralization proteins. The precipitate morphology and phases, the element time profile in solution and in the precipitates, as well as the kinetics during the precipitation process were analyzed to explain the effect of these short peptides on calcium phosphate precipitation. The results show that peptides can delay the phase transformation of an amorphous precursor phase to hydroxyapatite and that there is an optimal chain length for this effect at a given concentration of peptide. This study is the first part of a two-part series and is followed by a subsequent work to reveal the mechanism by which these short peptides influence the calcium phosphate precipitation.
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Affiliation(s)
- Putu Ustriyana
- Department of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
| | - Emma Harmon
- Department of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
| | - Kexun Chen
- Department of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
| | - F Marc Michel
- Department of Geosciences, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, United States
| | - Nita Sahai
- Department of Polymer Science, The University of Akron, Akron, Ohio 44325, United States.,Department of Geosciences, The University of Akron, Akron, Ohio 44325, United States.,Integrated Bioscience Program, The University of Akron, Akron, Ohio 44325, United States
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11
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Asgar H, Semeykina V, Hunt M, Mohammed S, Kuzmenko I, Zharov I, Gadikota G. Thermally-Induced morphological evolution of spherical silica nanoparticles using in-operando X-ray scattering measurements. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2019.124260] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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12
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Hammond-Pereira E, Bryant K, Graham TR, Yang C, Mergelsberg S, Wu D, Saunders SR. Mesoporous silica-encapsulated gold core–shell nanoparticles for active solvent-free benzyl alcohol oxidation. REACT CHEM ENG 2020. [DOI: 10.1039/d0re00198h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Silica-encapsulated gold core@shell nanoparticles (Au@SiO2 CSNPs) were synthesized via a tunable bottom-up procedure to catalyze the aerobic oxidation of benzyl alcohol.
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Affiliation(s)
- Ellis Hammond-Pereira
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering
- Washington State University
- Pullman
- USA
| | - Kristin Bryant
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering
- Washington State University
- Pullman
- USA
| | - Trent R. Graham
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering
- Washington State University
- Pullman
- USA
- Pacific Northwest National Laboratory
| | - Chen Yang
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering
- Washington State University
- Pullman
- USA
- Alexandra Navrotsky Institute for Experimental Thermodynamics
| | | | - Di Wu
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering
- Washington State University
- Pullman
- USA
- Alexandra Navrotsky Institute for Experimental Thermodynamics
| | - Steven R. Saunders
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering
- Washington State University
- Pullman
- USA
- Department of Chemistry
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