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Kettlewell B, Boyd D. Inside the Borate Anomaly: Leveraging a Predictive Modelling Approach to Navigate Complex Composition-Structure-Property Relationships in Oxyhalide Borate Glasses. MATERIALS (BASEL, SWITZERLAND) 2024; 17:2073. [PMID: 38730877 PMCID: PMC11084878 DOI: 10.3390/ma17092073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Revised: 04/11/2024] [Accepted: 04/19/2024] [Indexed: 05/13/2024]
Abstract
This study employs a systematic and predictive modelling approach to investigate the structure and properties of multi-component borate glasses. In particular, this work is focused on understanding the individual and interaction effects of multiple constituents on several material properties. By leveraging advanced modeling techniques, this work examines how the inclusion and variation of B2O3, CaF2, TiO2, ZnO, and Na2CO3 influence the glass network, with particular attention to modifier fractions ≥ 30 mol%. This research addresses the gap in knowledge regarding the complex behavior of borate glasses in this high modifier fraction range, known as the borate anomaly, where prediction of glass structure and properties becomes particularly challenging. The use of a design of mixtures (DoM) approach facilitated the generation of polynomial equations indicating the influence of mixture components on various responses, enabling the prediction and optimization of glass properties over broad compositional ranges despite being within the anomalous region. This methodical approach not only advances our understanding of borate glass systems but also underscores the importance of predictive modelling in the accelerated design and development of novel glass materials for diverse applications.
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Affiliation(s)
- Brenna Kettlewell
- School of Biomedical Engineering, Dalhousie University, Halifax, NS B3H 4R2, Canada;
| | - Daniel Boyd
- Department of Applied Oral Sciences, Faculty of Dentistry, Dalhousie University, 5981 University Avenue, P.O. Box 15000, Halifax, NS B3H 4R2, Canada
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2
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Zhao C, Yu J, Chen X, Wu Q, Zhou W, Bauchy M. Atomistic origin of kinetics in hydrated aluminosilicate gels upon precipitation. J Chem Phys 2023; 159:144501. [PMID: 37811823 DOI: 10.1063/5.0165937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Accepted: 09/22/2023] [Indexed: 10/10/2023] Open
Abstract
Calcium-alumino-silicate-hydrate (CaO-Al2O3-SiO2-H2O, or C-A-S-H) gel, which is the binding phase of cement-based materials, greatly influences concrete mechanical properties and durability. However, the atomic-scale kinetics of the aluminosilicate network condensation remains puzzling. Here, based on reactive molecular dynamics simulations of C-A-S-H systems formation with varying Al/Ca molar ratios, we study the kinetic mechanism of the hydrated aluminosilicate gels upon precipitation. We show that the condensation activation energy decreases with the Al/Ca molar ratio, which suggests that the concentration of the Al polytopes has a great effect on controlling the kinetics of the gelation reaction. Significantly, we demonstrate that 5-fold Al atoms are mainly forming at high Al/Ca molar ratios since there are insufficient hydrogen cations or extra calcium cations to compensate the negatively charged Al polytopes at high Al/Ca molar ratios during accelerated aging.
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Affiliation(s)
- Cheng Zhao
- School of Civil Engineering and Architecture, Wuhan Institute of Technology, Wuhan 430074, China
- Hubei Provincial Engineering Research Center for Green Civil Engineering Materials and Structures, Wuhan 430074, China
| | - Jiahui Yu
- School of Civil Engineering and Architecture, Wuhan Institute of Technology, Wuhan 430074, China
- Hubei Provincial Engineering Research Center for Green Civil Engineering Materials and Structures, Wuhan 430074, China
| | - Xuyong Chen
- School of Civil Engineering and Architecture, Wuhan Institute of Technology, Wuhan 430074, China
- Hubei Provincial Engineering Research Center for Green Civil Engineering Materials and Structures, Wuhan 430074, China
| | - Qiaoyun Wu
- School of Civil Engineering and Architecture, Wuhan Institute of Technology, Wuhan 430074, China
- Hubei Provincial Engineering Research Center for Green Civil Engineering Materials and Structures, Wuhan 430074, China
| | - Wei Zhou
- State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China
| | - Mathieu Bauchy
- Physics of AmoRphous and Inorganic Solids Laboratory (PARISlab), Department of Civil and Environmental Engineering, University of California, Los Angeles, California 90095, USA
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3
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Zhai H, Chen Q, Yilmaz M, Wang B. Enhancing Aqueous Carbonation of Calcium Silicate through Acid and Base Pretreatments with Implications for Efficient Carbon Mineralization. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:13808-13817. [PMID: 37672711 DOI: 10.1021/acs.est.3c03942] [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: 09/08/2023]
Abstract
Carbon dioxide (CO2) mineralization based on aqueous carbonation of alkaline earth silicate minerals is a promising route toward large-scale carbon removal. Traditional aqueous carbonation methods largely adopt acidification-based approaches, e.g., using concentrated/pressurized CO2 or acidic media, to accelerate mineral dissolution and carbonation. In this study, we designed and tested three distinctive routes to evaluate the effect of pretreatments under different pH conditions on aqueous carbonation, using amorphous calcium silicate (CS) as an example system. Pretreating CS with high concentrations (100 mM) of HCl (Route I) or NaOH (Route II and III) enhanced their carbonation degrees. However, NaOH pretreatment overall yielded higher carbonation degrees than the HCl pretreatment, with the highest carbonation degree achieved through Route III, where an extra step is taken after the NaOH pretreatment to remove the solution containing dissolved silica prior to carbonation. The HCl and NaOH pretreatments formed different intermediate silica products on the CS surface. Silica precipitated from the HCl pretreatment had a minimal effect on the carbonation degree. The high Ca/Si ratio intermediate phases formed from the NaOH, on the other hand, can be readily carbonated. In contrast to commonly utilized acidification-based approaches, basification offers a more promising route to accelerate aqueous carbonation as it can mitigate the need for costly pH swing and high-concentration/pressurized CO2. The key to aqueous carbonation under basic conditions, as suggested by this study, is the control of aqueous silica species that have a suppressing effect on carbonation. Overall, this study highlights the critical needs for investigations of aqueous mineral carbonation in a broader pH region.
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Affiliation(s)
- Hang Zhai
- Department of Civil and Environmental Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Qiyuan Chen
- Department of Civil and Environmental Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
- Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Mehmet Yilmaz
- Department of Civil and Environmental Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
- School of Civil, Environmental and Infrastructure Engineering, Southern Illinois University, Carbondale, Illinois 62901, United States
| | - Bu Wang
- Department of Civil and Environmental Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
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4
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Liu Z, Navas JL, Han W, Ibarra MR, Cho Kwan JK, Yeung KL. Gel transformation as a general strategy for fabrication of highly porous multiscale MOF architectures. Chem Sci 2023; 14:7114-7125. [PMID: 37416716 PMCID: PMC10321590 DOI: 10.1039/d3sc00905j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Accepted: 05/26/2023] [Indexed: 07/08/2023] Open
Abstract
The structure and chemistry of metal-organic frameworks or MOFs dictate their properties and functionalities. However, their architecture and form are essential for facilitating the transport of molecules, the flow of electrons, the conduction of heat, the transmission of light, and the propagation of force, which are vital in many applications. This work explores the transformation of inorganic gels into MOFs as a general strategy to construct complex porous MOF architectures at nano, micro, and millimeter length scales. MOFs can be induced to form along three different pathways governed by gel dissolution, MOF nucleation, and crystallization kinetics. Slow gel dissolution, rapid nucleation, and moderate crystal growth result in a pseudomorphic transformation (pathway 1) that preserves the original network structure and pores, while a comparably faster crystallization displays significant localized structural changes but still preserves network interconnectivity (pathway 2). MOF exfoliates from the gel surface during rapid dissolution, thus inducing nucleation in the pore liquid leading to a dense assembly of percolated MOF particles (pathway 3). Thus, the prepared MOF 3D objects and architectures can be fabricated with superb mechanical strength (>98.7 MPa), excellent permeability (>3.4 × 10-10 m2), and large surface area (1100 m2 g-1) and mesopore volumes (1.1 cm3 g-1).
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Affiliation(s)
- Zhang Liu
- Division of Environment and Sustainability, The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong SAR China
- HKUST Shenzhen Research Institute Hi-tech Park Shenzhen 518057 China
- HKUST Shenzhen-Hong Kong Collaborative Innovation Research Institute, Futian Shenzhen China
| | - Javier Lopez Navas
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong SAR China
| | - Wei Han
- Division of Environment and Sustainability, The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong SAR China
- HKUST Shenzhen Research Institute Hi-tech Park Shenzhen 518057 China
- HKUST Shenzhen-Hong Kong Collaborative Innovation Research Institute, Futian Shenzhen China
- Guangzhou HKUST Fok Ying Tung Research Institute Nansha IT Park Guangzhou 511458 China
| | - Manuel Ricardo Ibarra
- Instituto de Nanociencia y Materiales de Aragón (INMA), Laboratory of Advanced Microscopies (LMA), Universidad de Zaragoza 50018 Zaragoza Spain
- Departamento de Física de la Materia Condensada, Facultad de Ciencias, Universidad de Zaragoza 50009 Zaragoza Spain
| | - Joseph Kai Cho Kwan
- Division of Environment and Sustainability, The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong SAR China
- HKUST Shenzhen Research Institute Hi-tech Park Shenzhen 518057 China
- HKUST Shenzhen-Hong Kong Collaborative Innovation Research Institute, Futian Shenzhen China
| | - King Lun Yeung
- Division of Environment and Sustainability, The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong SAR China
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong SAR China
- HKUST Shenzhen Research Institute Hi-tech Park Shenzhen 518057 China
- HKUST Shenzhen-Hong Kong Collaborative Innovation Research Institute, Futian Shenzhen China
- Guangzhou HKUST Fok Ying Tung Research Institute Nansha IT Park Guangzhou 511458 China
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5
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La Bella M, Besselink R, Wright JP, Van Driessche AES, Fernandez-Martinez A, Giacobbe C. Hierarchical synchrotron diffraction and imaging study of the calcium sulfate hemihydrate-gypsum transformation. J Appl Crystallogr 2023; 56:660-672. [PMID: 37284277 PMCID: PMC10241062 DOI: 10.1107/s1600576723002881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Accepted: 03/26/2023] [Indexed: 06/08/2023] Open
Abstract
The mechanism of hydration of calcium sulfate hemihydrate (CaSO4·0.5H2O) to form gypsum (CaSO4·2H2O) was studied by combining scanning 3D X-ray diffraction (s3DXRD) and phase contrast tomography (PCT) to determine in situ the spatial and crystallographic relationship between these two phases. From s3DXRD measurements, the crystallographic structure, orientation and position of the crystalline grains in the sample during the hydration reaction were obtained, while the PCT reconstructions allowed visualization of the 3D shapes of the crystals during the reaction. This multi-scale study unfolds structural and morphological evidence of the dissolution-precipitation process of the gypsum plaster system, providing insights into the reactivity of specific crystallographic facets of the hemihydrate. In this work, epitaxial growth of gypsum crystals on the hemihydrate grains was not observed.
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Affiliation(s)
- Michela La Bella
- European Synchrotron Radiation Facility, 71 Avenue Des Martyrs, Grenoble 38040, France
- Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, Grenoble 38000, France
| | - Rogier Besselink
- Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, Grenoble 38000, France
| | - Jonathan P. Wright
- European Synchrotron Radiation Facility, 71 Avenue Des Martyrs, Grenoble 38040, France
| | - Alexander E. S. Van Driessche
- Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, Grenoble 38000, France
- Instituto Andaluz de Ciencias de la Tierra (IACT), CSIC-University of Granada, Armilla 18100, Spain
| | | | - Carlotta Giacobbe
- European Synchrotron Radiation Facility, 71 Avenue Des Martyrs, Grenoble 38040, France
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6
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Lauer AR, Hellmann R, Montes-Hernandez G, Findling N, Ling WL, Epicier T, Fernandez-Martinez A, Van Driessche AES. Deciphering strontium sulfate precipitation via Ostwald's rule of stages: From prenucleation clusters to solution-mediated phase tranformation. J Chem Phys 2023; 158:054501. [PMID: 36754828 DOI: 10.1063/5.0136870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Multiple-step nucleation pathways have been observed during mineral formation in both inorganic and biomineral systems. These pathways can involve precursor aqueous species, amorphous intermediates, or metastable phases. Despite the widespread occurrence of these processes, elucidating the precise nucleation steps and the transformation mechanisms between each step remains a challenging task. Using a suite of potentiometric, microscopic, and spectroscopic tools, we studied the nucleation pathway of SrSO4 as a function of the physico-chemical solution parameters. Our observations reveal that below a threshold supersaturation, nucleation is driven by bound species, akin to the prenucleation cluster model, which directly leads to the formation of the stable phase celestine, SrSO4. At higher supersaturations, this situation is altered, with nucleation dominated by the consumption of free ions. Importantly, this change in nucleation mechanism is coupled to the formation of a hemihydrate metastable phase, SrSO4 · 1/2H2O, which eventually transforms into celestine, adhering to Ostwald's rule of stages. This transformation is a solution-mediated process, also occurring in the presence of a fluid film and is controlled by the physico-chemical parameters of the surrounding environment. It proceeds through the dissolution of the metastable phase and the de novo crystallization of the final phase. Overall, our results reveal that ion association taking place during the prenucleation stage dictates whether the nucleation pathway goes through an intermediate phase or not. This also underlines that although Ostwald's rule of stages is a common process, it is not a prerequisite for mineral formation-even in systems where it can occur.
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Affiliation(s)
- A R Lauer
- Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, IRD, ISTerre, 38000 Grenoble, France
| | - R Hellmann
- Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, IRD, ISTerre, 38000 Grenoble, France
| | - G Montes-Hernandez
- Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, IRD, ISTerre, 38000 Grenoble, France
| | - N Findling
- Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, IRD, ISTerre, 38000 Grenoble, France
| | - W L Ling
- Université Grenoble Alpes, CEA, CNRS, IBS, F-38000 Grenoble, France
| | - T Epicier
- Université de Lyon, Université Claude Bernard Lyon1, IRCELYON, umr CNRS 5256, 69626 Villeurbanne Cedex, France
| | - A Fernandez-Martinez
- Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, IRD, ISTerre, 38000 Grenoble, France
| | - A E S Van Driessche
- Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, IRD, ISTerre, 38000 Grenoble, France
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7
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Natural glass alteration under a hyperalkaline condition for about 4000 years. Sci Rep 2022; 12:16012. [PMID: 36163412 PMCID: PMC9512812 DOI: 10.1038/s41598-022-20482-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Accepted: 09/13/2022] [Indexed: 11/30/2022] Open
Abstract
Silicate glasses are durable materials in our daily life, but corrosion rate accelerates under alkaline aqueous environment. Such situation has raised concerns, for example, in nuclear waste disposal where vitrified wastes encounter to alkaline leachate from surrounding concrete materials. Here we report volcanic glass example surviving with a hyperalkaline groundwater (pH > 11) and high flow rate for about 4000 years. The tiny glass fragments were extracted from the volcanic ash layer sandwiched between ultramafic sediments using microanalytical techniques. Sharp elemental distributions at the glass surface, where amorphous-like smectite precursors and crystalline smectites coexist, suggest the corrosion by an interface-coupled dissolution–precipitation mechanism rather than inter-diffusion. The corrosion rate was maintained at, the minimum, 2.5 orders of magnitude less than the rate observed for fresh glass, even in the presence of Fe and Mg that might have consumed Si through the silicate precipitation.
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8
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Molecular-scale mechanisms of CO2 mineralization in nanoscale interfacial water films. Nat Rev Chem 2022; 6:598-613. [PMID: 37117714 DOI: 10.1038/s41570-022-00418-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/21/2022] [Indexed: 01/02/2023]
Abstract
The calamitous impacts of unabated carbon emission from fossil-fuel-burning energy infrastructure call for accelerated development of large-scale CO2 capture, utilization and storage technologies that are underpinned by a fundamental understanding of the chemical processes at a molecular level. In the subsurface, rocks rich in divalent metals can react with CO2, permanently sequestering it in the form of stable metal carbonate minerals, with the CO2-H2O composition of the post-injection pore fluid acting as a primary control variable. In this Review, we discuss mechanistic reaction pathways for aqueous-mediated carbonation with carbon mineralization occurring in nanoscale adsorbed water films. In the extreme of pores filled with a CO2-dominant fluid, carbonation reactions are confined to angstrom to nanometre-thick water films coating mineral surfaces, which enable metal cation release, transport, nucleation and crystallization of metal carbonate minerals. Although seemingly counterintuitive, laboratory studies have demonstrated facile carbonation rates in these low-water environments, for which a better mechanistic understanding has come to light in recent years. The overarching objective of this Review is to delineate the unique underlying molecular-scale reaction mechanisms that govern CO2 mineralization in these reactive and dynamic quasi-2D interfaces. We highlight the importance of understanding unique properties in thin water films, such as how water dielectric properties, and consequently ion solvation and hydration behaviour, can change under nanoconfinement. We conclude by identifying important frontiers for future work and opportunities to exploit these fundamental chemical insights for decarbonization technologies in the twenty-first century.
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9
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Wang M, Li A, Zhang X, Zhang D, Jin S, Xiong D, Deng W. Tailoring effect of Y2O3 on water resistance of Na2O–ZnO–Al2O3–B2O3 glasses. J RARE EARTH 2022. [DOI: 10.1016/j.jre.2021.08.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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10
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van der Weijden A, van Hecke M, Noorduin WL. Contraction and Expansion of Nanocomposites during Ion Exchange Reactions. CRYSTAL GROWTH & DESIGN 2022; 22:2289-2293. [PMID: 35401052 PMCID: PMC8990519 DOI: 10.1021/acs.cgd.1c01364] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Revised: 03/01/2022] [Indexed: 05/04/2023]
Abstract
The next generation of advanced functional materials can greatly benefit from methods for realizing the right chemical composition at the right place. Nanocomposites of amorphous silica and metal carbonate nanocrystals (BaCO3/SiO2) form an attractive starting point as they can straightforwardly be assembled in different controllable three-dimensional (3D) shapes, while the chemical composition of the nanocrystals can be completely converted via ion exchange. Nevertheless, it is still unknown-let alone predictable-how nanoscopic changes in the lattice volume of the nanocrystals translate to changes in the microscopic dimensions of 3D BaCO3/SiO2 structures during ion exchange. Here, we demonstrate that the microscopic shape adapts to contraction and expansion of the atomic spacing of nanocrystals. Starting from BaCO3/SiO2, we systematically decrease and increase lattice volumes by converting the BaCO3 nanocrystals into a range of chalcogenides and perovskites. Based on geometrical analysis, we obtain a precise prediction for how the microscopic nanocomposite volume follows the change in nanoscopic crystal volume. The silica matrix facilitates mechanical flexibility to adapt to nanoscopic volume changes, while preserving the 3D morphology and fine details of the original composite with high fidelity. The versatility and predictability of shape-preserving conversion reactions open up exciting opportunities for using nanocomposites as functional components.
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Affiliation(s)
| | - Martin van Hecke
- AMOLF, Science Park 104, Amsterdam 1098 XG, The Netherlands
- Leiden
Institute of Physics, Leiden University, Niels Bohrweg 2, Leiden 2333 CA, The Netherlands
| | - Willem L. Noorduin
- AMOLF, Science Park 104, Amsterdam 1098 XG, The Netherlands
- Van
‘t Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, Amsterdam 1090 GD, The Netherlands
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11
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Guo Q, Feng T, Lance MJ, Unocic KA, Pantelides ST, Lara-Curzio E. Evolution of the structure and chemical composition of the interface between multi-component silicate glasses and yttria-stabilized zirconia after 40,000 h exposure in air at 800 °C. Ann Ital Chir 2022. [DOI: 10.1016/j.jeurceramsoc.2021.11.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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12
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Fungal hyphae develop where titanomagnetite inclusions reach the surface of basalt grains. Sci Rep 2022; 12:3407. [PMID: 35232970 PMCID: PMC8888555 DOI: 10.1038/s41598-021-04157-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 12/13/2021] [Indexed: 11/21/2022] Open
Abstract
Nutrient foraging by fungi weathers rocks by mechanical and biochemical processes. Distinguishing fungal-driven transformation from abiotic mechanisms in soil remains a challenge due to complexities within natural field environments. We examined the role of fungal hyphae in the incipient weathering of granulated basalt from a three-year field experiment in a mixed hardwood-pine forest (S. Carolina) to identify alteration at the nanometer to micron scales based on microscopy-tomography analyses. Investigations of fungal-grain contacts revealed (i) a hypha-biofilm-basaltic glass interface coinciding with titanomagnetite inclusions exposed on the grain surface and embedded in the glass matrix and (ii) native dendritic and subhedral titanomagnetite inclusions in the upper 1–2 µm of the grain surface that spanned the length of the fungal-grain interface. We provide evidence of submicron basaltic glass dissolution occurring at a fungal-grain contact in a soil field setting. An example of how fungal-mediated weathering can be distinguished from abiotic mechanisms in the field was demonstrated by observing hyphal selective occupation and hydrolysis of glass-titanomagnetite surfaces. We hypothesize that the fungi were drawn to basaltic glass-titanomagnetite boundaries given that titanomagnetite exposed on or very near grain surfaces represents a source of iron to microbes. Furthermore, glass is energetically favorable to weathering in the presence of titanomagnetite. Our observations demonstrate that fungi interact with and transform basaltic substrates over a three-year time scale in field environments, which is central to understanding the rates and pathways of biogeochemical reactions related to nuclear waste disposal, geologic carbon storage, nutrient cycling, cultural artifact preservation, and soil-formation processes.
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Gonzalez-Panicello L, Garcia-Lodeiro I, Puertas F, Palacios M. Influence of Accelerating Admixtures on the Reactivity of Synthetic Aluminosilicate Glasses. MATERIALS 2022; 15:ma15030818. [PMID: 35160763 PMCID: PMC8836432 DOI: 10.3390/ma15030818] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 01/13/2022] [Accepted: 01/17/2022] [Indexed: 02/04/2023]
Abstract
This research aims at gaining a further understanding of the impact of accelerating admixtures on the reactivity of supplementary cementitious materials (SCMs), which are widely used as a clinker replacement in blended cements. This was done on synthetic glasses with controlled composition and structure that mimic two types of real SCMs (slag and calcium-rich fly ash). The effects of DEIPA, TIPA, NaSCN and Na2S2O3 on the glass dissolution, hydration kinetics and reaction products were investigated. The obtained results concluded that the pH of the NaOH solution and the composition of the synthetic glass play a key role on the effect of the admixtures. In 0.1 M NaOH (pH = 13.0), all the studied admixtures inhibited the dissolution of slag-like glasses while they enhanced the dissolution of Ca-rich fly ash-like glasses, being Na2S2O3 the admixture that led to the highest increase of the dissolution rate of the Ca-rich fly ash-type glasses. In 1 M NaOH solutions (pH = 13.8), only the alkali admixtures (NaSCN and Na2S2O3) enhanced the degree of reaction of both glasses. In slag-type glasses pastes mixed with 1 M NaOH, the addition of 2% Na2S2O3 induced the highest increase of their reactivity as inferred by the total heat release and the amount of bound water. This is related to the formation of a high amount of S(II)-AFm, in addition to C-A-S-H, that would increase the aluminium undersaturation of the pore solution and consequently the further dissolution of the glass.
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14
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Surface evolution of aluminosilicate glass fibers during dissolution: Influence of pH, solid-to-solution ratio and organic treatment. J Colloid Interface Sci 2022; 606:1983-1997. [PMID: 34695763 DOI: 10.1016/j.jcis.2021.09.148] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 09/22/2021] [Accepted: 09/23/2021] [Indexed: 12/21/2022]
Abstract
Materials made of synthetic vitreous mineral fibers, such as stone wool, are widely used in construction, in functional composites and as thermal and acoustic insulation. Chemical stability is an important parameter in assessing long term durability of the products. Stability is determined by fiber resistivity to dissolution, where the controlling parameters are solid surface area to solution volume ratio (S/V), pH and composition of the fibers and organic compounds used as binders. We investigated stone wool dissolution under flow through conditions, far from equilibrium, at pH range of 2 to 13, as well as under batch conditions, close to equilibrium, for up to 28 days, where S/V ranged from 100 to 10000 m-1. The dissolution rate of stone wool shows minimum at pH 8.5 and increases significantly at pH < 4.5 and pH > 12. In close to equilibrium conditions, S/V defines the steady state concentration for the leached components. Decreased dissolution rate could result from evolution of a surface leached layer or the formation of secondary surface phases or both. We suggested three dissolution rate controlling mechanisms, which depend on pH. That is, dissolution is controlled by: a SiO2 rich surface layer at pH < 4.5; by adsorption of an Al and Al-Si mixed surface layer at 5 < pH < 11 and by divalent cation adsorption and formation of secondary phases (silicates, hydroxides) at pH ∼ 13. The organic compounds, used to treat the stone wool fibers during manufacture, had no influence on their dissolution properties.
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15
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Jakub Z, Meier M, Kraushofer F, Balajka J, Pavelec J, Schmid M, Franchini C, Diebold U, Parkinson GS. Rapid oxygen exchange between hematite and water vapor. Nat Commun 2021; 12:6488. [PMID: 34759277 PMCID: PMC8580966 DOI: 10.1038/s41467-021-26601-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Accepted: 10/13/2021] [Indexed: 11/14/2022] Open
Abstract
Oxygen exchange at oxide/liquid and oxide/gas interfaces is important in technology and environmental studies, as it is closely linked to both catalytic activity and material degradation. The atomic-scale details are mostly unknown, however, and are often ascribed to poorly defined defects in the crystal lattice. Here we show that even thermodynamically stable, well-ordered surfaces can be surprisingly reactive. Specifically, we show that all the 3-fold coordinated lattice oxygen atoms on a defect-free single-crystalline "r-cut" ([Formula: see text]) surface of hematite (α-Fe2O3) are exchanged with oxygen from surrounding water vapor within minutes at temperatures below 70 °C, while the atomic-scale surface structure is unperturbed by the process. A similar behavior is observed after liquid-water exposure, but the experimental data clearly show most of the exchange happens during desorption of the final monolayer, not during immersion. Density functional theory computations show that the exchange can happen during on-surface diffusion, where the cost of the lattice oxygen extraction is compensated by the stability of an HO-HOH-OH complex. Such insights into lattice oxygen stability are highly relevant for many research fields ranging from catalysis and hydrogen production to geochemistry and paleoclimatology.
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Affiliation(s)
- Zdenek Jakub
- Institute of Applied Physics, TU Wien, Vienna, Austria
- Central European Institute of Technology (CEITEC), Brno University of Technology, Brno, Czech Republic
| | - Matthias Meier
- Institute of Applied Physics, TU Wien, Vienna, Austria
- University of Vienna, Faculty of Physics and Center for Computational Materials Science, Vienna, Austria
| | | | - Jan Balajka
- Institute of Applied Physics, TU Wien, Vienna, Austria
| | - Jiri Pavelec
- Institute of Applied Physics, TU Wien, Vienna, Austria
| | | | - Cesare Franchini
- University of Vienna, Faculty of Physics and Center for Computational Materials Science, Vienna, Austria
- Alma Mater Studiorum-Università di Bologna, Bologna, Italy
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Frankel GS, Vienna JD, Lian J, Guo X, Gin S, Kim SH, Du J, Ryan JV, Wang J, Windl W, Taylor CD, Scully JR. Recent Advances in Corrosion Science Applicable To Disposal of High-Level Nuclear Waste. Chem Rev 2021; 121:12327-12383. [PMID: 34259500 DOI: 10.1021/acs.chemrev.0c00990] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
High-level radioactive waste is accumulating at temporary storage locations around the world and will eventually be placed in deep geological repositories. The waste forms and containers will be constructed from glass, crystalline ceramic, and metallic materials, which will eventually come into contact with water, considering that the period of performance required to allow sufficient decay of dangerous radionuclides is on the order of 105-106 years. Corrosion of the containers and waste forms in the aqueous repository environment is therefore a concern. This Review describes the recent advances of the field of materials corrosion that are relevant to fundamental materials science issues associated with the long-term performance assessment and the design of materials with improved performance, where performance is defined as resistance to aqueous corrosion. Glass, crystalline ceramics, and metals are discussed separately, and the near-field interactions of these different material classes are also briefly addressed. Finally, recommendations for future directions of study are provided.
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Affiliation(s)
- Gerald S Frankel
- Department of Materials Science and Engineering, The Ohio State University, Columbus, Ohio 43210, United States
| | - John D Vienna
- Energy and Environment Directorate, Pacific Northwest National Laboratories, Richland, Washington 99354, United States
| | - Jie Lian
- Department of Mechanical Aerospace and Nuclear Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Xiaolei Guo
- Department of Materials Science and Engineering, The Ohio State University, Columbus, Ohio 43210, United States
| | - Stephane Gin
- CEA, DE2D, University of Montpellier, Marcoule, F-30207 Bagnols sur Cèze, 34000 Montpellier, France
| | - Seong H Kim
- Department of Chemical Engineering and Materials Research Institute, Pennsylvania State University, University Park, Pennsylvania 16801, United States
| | - Jincheng Du
- Department of Materials Science and Engineering, University of North Texas, Denton, Texas 76203, United States
| | - Joseph V Ryan
- Energy and Environment Directorate, Pacific Northwest National Laboratories, Richland, Washington 99354, United States
| | - Jianwei Wang
- Department of Geology and Geophysics, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Wolfgang Windl
- Department of Materials Science and Engineering, The Ohio State University, Columbus, Ohio 43210, United States
| | - Christopher D Taylor
- Department of Materials Science and Engineering, The Ohio State University, Columbus, Ohio 43210, United States
| | - John R Scully
- Department of Materials Science and Engineering, University of Virginia, Charlottesville, Virginia 22903, United States
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17
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Zhao C, Zhou W, Zhou Q, Wang Z, Sant G, Guo L, Bauchy M. Topological origin of phase separation in hydrated gels. J Colloid Interface Sci 2021; 590:199-209. [PMID: 33548603 DOI: 10.1016/j.jcis.2021.01.068] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 01/20/2021] [Accepted: 01/21/2021] [Indexed: 10/22/2022]
Abstract
HYPOTHESIS Depending on their composition, hydrated gels can be homogeneous or phase-separated, which, in turn, affects their dynamical and mechanical properties. However, the nature of the structural features, if any, that govern the propensity for a given gel to phase-separate remains largely unknown. Here, we argue that the propensity for hydrated gels to phase-separate is topological in nature. SIMULATIONS We employ reactive molecular dynamics simulations to model the early-age precipitation of calcium-alumino-silicate-hydrate (CASH) gels with varying compositions, i.e., (CaO)1.7(Al2O3)x(SiO2)1 -x(H2O)3.7 +x. By adopting topological constraint theory, we investigate the structural origin of phase separation in hydrated gels. FINDINGS We report the existence of a homogeneous-to-phase-separated transition, wherein Si-rich (x ≤ 0.10) CASH gels are homogeneous, whereas Al-rich (x > 0.10) CASH gels tend to phase-separate. Furthermore, we demonstrate that this transition is correlated to a topological flexible-to-rigid transition within the atomic network. We reveal that the propensity for topologically-overconstrained gels to phase-separate arises from the existence of some internal stress within their atomic network, which acts as an energy penalty that drives phase separation.
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Affiliation(s)
- Cheng Zhao
- State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China; Physics of AmoRphous and Inorganic Solids Laboratory (PARISlab), Department of Civil and Environmental Engineering, University of California, Los Angeles, CA 90095, USA
| | - Wei Zhou
- State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China.
| | - Qi Zhou
- Physics of AmoRphous and Inorganic Solids Laboratory (PARISlab), Department of Civil and Environmental Engineering, University of California, Los Angeles, CA 90095, USA
| | - Zhe Wang
- Physics of AmoRphous and Inorganic Solids Laboratory (PARISlab), Department of Civil and Environmental Engineering, University of California, Los Angeles, CA 90095, USA
| | - Gaurav Sant
- Laboratory for the Chemistry of Construction Materials (LC(2)), Department of Civil and Environmental Engineering, University of California, Los Angeles, CA 90095, USA; California Nanosystems Institute (CNSI), University of California, Los Angeles, CA 90095, USA; Institute for Carbon Management (ICM), University of California, Los Angeles, CA 90095, USA
| | - Lijie Guo
- National Centre for International Research on Green Metal Mining, BGRIMM Technology Group, Beijing 100160, China.
| | - Mathieu Bauchy
- Physics of AmoRphous and Inorganic Solids Laboratory (PARISlab), Department of Civil and Environmental Engineering, University of California, Los Angeles, CA 90095, USA; Institute for Carbon Management (ICM), University of California, Los Angeles, CA 90095, USA.
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18
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Lee CW, Kwon YK, Heo J. Local atomic structure of uranium ions and dissolution behavior of iron phosphate glass hosts to immobilize spent nuclear fuel. J Radioanal Nucl Chem 2021. [DOI: 10.1007/s10967-021-07687-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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19
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Ma Y, Ashraf M, Srinivasan C. Microscopic evaluation of pharmaceutical glass container-formulation interactions under stressed conditions. Int J Pharm 2021; 596:120248. [PMID: 33486025 DOI: 10.1016/j.ijpharm.2021.120248] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 12/31/2020] [Accepted: 01/05/2021] [Indexed: 11/24/2022]
Abstract
Chemical incompatibility of the formulation with glass container can adversely impact the quality of parenteral products. The objective of this study is to investigate formulation-glass interactions at the inner surface of the glass containers that lead to the generation of particulates under stressed conditions (i.e., combinations of high pHs, temperatures and prolonged exposure selected to purposely cause failure of glass containers) using advanced microscopic techniques. The optical, electron microscopy and X-ray spectroscopy were used in tandem to investigate the nature of these interactions at the vial inner surface. These interactions were characterized by surface roughness and reaction zones on the inner surface of the vials and particulates in the formulation using two commercially available pharmaceutical glass containers (Vials 1 and 2). A nanoscale level examination of the inner surface of Vial 1 revealed layers flaking off from the inner surface of the vial resulting in typical particulate generation, while the reaction zone on the inner surface of Vial 2 exhibited a different layered structure. The results suggest that particulates observed in Vials 1 and 2 were generated through different failure modes.
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Affiliation(s)
- Youlong Ma
- Division of Product Quality Research, Office of Testing and Research, OPQ, CDER, FDA, United States
| | - Muhammad Ashraf
- Division of Product Quality Research, Office of Testing and Research, OPQ, CDER, FDA, United States
| | - Charudharshini Srinivasan
- Division of Product Quality Research, Office of Testing and Research, OPQ, CDER, FDA, United States.
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20
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Dwivedi D, Mata JP, Salvemini F, Rowles MR, Becker T, Lepková K. Uncovering the superior corrosion resistance of iron made via ancient Indian iron-making practice. Sci Rep 2021; 11:4221. [PMID: 33608578 PMCID: PMC7896077 DOI: 10.1038/s41598-021-81918-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Accepted: 12/17/2020] [Indexed: 11/29/2022] Open
Abstract
Ancient Indian iron artefacts have always fascinated researchers due to their excellent corrosion resistance, but the scientific explanation of this feature remains to be elucidated. We have investigated corrosion resistance of iron manufactured according to traditional metallurgical processes by the Indian tribes called ‘Agaria’. Iron samples were recovered from central India (Aamadandh, Korba district, Chhattisgarh). Iron artefacts are investigated using a range of correlative microscopic, spectroscopic, diffraction and tomographic techniques to postulate the hidden mechanisms of superlative corrosion resistance. The importance of manufacturing steps, ingredients involved in Agaria’s iron making process, and post-metal treatment using metal-working operation called hot hammering (forging) is highlighted. This study also hypothesizes the probable protective mechanisms of corrosion resistance of iron. Findings are expected to have a broad impact across multiple disciplines such as archaeology, metallurgy and materials science.
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Affiliation(s)
- Deepak Dwivedi
- Curtin Corrosion Centre, WA School of Mines: Minerals, Energy and Chemical Engineering, Faculty of Science and Engineering, Curtin University, Perth, Australia
| | - Jitendra P Mata
- Australian Centre for Neutron Scattering, Australian Nuclear Science and Technology Organisation (ANSTO), Lucas Heights, NSW, 2234, Australia
| | - Filomena Salvemini
- Australian Centre for Neutron Scattering, Australian Nuclear Science and Technology Organisation (ANSTO), Lucas Heights, NSW, 2234, Australia
| | | | - Thomas Becker
- School of Molecular and Life Sciences (Chemistry), Curtin Institute for Functional Molecules and Interfaces, Faculty of Science and Engineering, Curtin University, Perth, Australia
| | - Kateřina Lepková
- Curtin Corrosion Centre, WA School of Mines: Minerals, Energy and Chemical Engineering, Faculty of Science and Engineering, Curtin University, Perth, Australia.
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21
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Bal’zhinimaev BS. Catalysis by platinum and palladium species confined in the bulk of glass fibre materials. RUSSIAN CHEMICAL REVIEWS 2020. [DOI: 10.1070/rcr4958] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The results of studies on the application of silicate glass fibre materials in catalysis are summarized and analyzed. Despite the very low noble metal content, catalysts based on these materials showed exceptionally high activities and selectivities in some catalytic reactions. This is due to specificity of the glassy state, which makes it possible, first, to confine highly dispersed palladium and platinum species in the bulk of glass fibres and, second, selectively absorb polar molecules, thus excluding the undesirable reactions involving non-polar molecules. The size dependences of the complete oxidation of propane and selective hydrogenation of acetylene, the nature of the structure sensitivity of these reactions and the reaction mechanisms are discussed. Ways for improving glass fibre catalyst performance are proposed and examples of the successful application of Pt/glass fibre catalysts for purification of industrial gases from volatile organic compounds are given.
The bibliography includes 175 references.
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22
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Okhrimenko DV, Nielsen CF, Lakshtanov LZ, Dalby KN, Johansson DB, Solvang M, Deubener J, Stipp SLS. Surface Reactivity and Dissolution Properties of Alumina-Silica Glasses and Fibers. ACS APPLIED MATERIALS & INTERFACES 2020; 12:36740-36754. [PMID: 32663394 DOI: 10.1021/acsami.0c09362] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The ability of bulk glass and fibers to react in aqueous solution, with organic polymers and coupling agents, depends on the surface charge, reactivity, and adsorption properties of the glass surface, i.e. the character and density of surface -OH groups, whereas glass and fiber chemical stability and biosolubility depend on the resistance to dissolution. If glass dissolution products are accumulated in a media, they can change the surface properties by specific adsorption. We determined the -OH surface concentration, reactivity, adsorption, and dissolution properties of aluminosilicate glasses containing various modifiers and compared the results with the behavior of complex mineral wool fibers. Using proton consumption and element release from batch surface titration experiments, over the range 5 < pH < 10, surface -OH adsorption properties were modeled with the FITEQL program. During titration, network modifiers in the glass subsurface are preferentially replaced by protons, resulting in cation accumulation in the solution and formation of a leached layer enriched with Si on the solid. The behavior of Al was different. At 5 < pH < 9, only very small amounts of Al were found in the leachates, which can be explained by almost complete Al adsorption as stable surface complexes, i.e. >XOAl(OH)2 (where X = Si or Al and > represents the surface). At pH > 9, divalent cations adsorbed specifically, as >XOMe+ complexes (Me = Ca or Mg). This deeper understanding of the surface behavior of glasses and fibers is important for the design of composite materials, for applications in biology and medicine and in materials production in general, as well as for understanding natural processes, such as global uptake estimates of CO2 during rock weathering.
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Affiliation(s)
| | - C F Nielsen
- ROCKWOOL International A/S, 2640 Hedehusene, Denmark
| | - L Z Lakshtanov
- Institute of Experimental Mineralogy RAS, 142432 Chernogolovka, Russia
| | - K N Dalby
- Haldor Topsoe A/S, Haldor Topsøes Alle 1, 2800 Kongens Lyngby, Denmark
| | - D B Johansson
- ROCKWOOL International A/S, 2640 Hedehusene, Denmark
| | - M Solvang
- ROCKWOOL International A/S, 2640 Hedehusene, Denmark
| | - J Deubener
- Institute of Non-Metallic Materials, Clausthal University of Technology, 38678 Clausthal-Zellerfeld, Germany
| | - S L S Stipp
- Department of Physics, Danish Technical University, 2800 Kongens Lyngby, Denmark
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23
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Wang L, Putnis CV. Dissolution and Precipitation Dynamics at Environmental Mineral Interfaces Imaged by In Situ Atomic Force Microscopy. Acc Chem Res 2020; 53:1196-1205. [PMID: 32441501 DOI: 10.1021/acs.accounts.0c00128] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Chemical reactions at the mineral-solution interface control important interfacial processes, such as geochemical element cycling, nutrient recovery from eutrophicated waters, sequestration of toxic contaminants, and geological carbon storage by mineral carbonation. By time-resolved in situ imaging of nanoscale mineral interfacial reactions, it is possible to clarify the mechanisms governing mineral-fluid reactions.In this Account, we present a concise summary of this topic that addresses a current challenge at the frontier of understanding mineral interfaces and their importance to a wide range of mineral re-equilibration processes in the presence of a fluid aqueous phase. We have used real-time nanoscale imaging of liquid-cell atomic force microscopy (AFM) to observe the in situ coupling of the dissolution-precipitation process, whereby the dissolution of a parent mineral phase is coupled at mineral interfaces with the precipitation of another product phase, chemically different from the parent. These nanoscale observations allow for the identification of dissolution and growth rates through systematically investigating various minerals, including calcite (CaCO3), siderite (FeCO3), cerussite (PbCO3), magnesite (MgCO3), dolomite (CaMg(CO3)2), brushite (CaHPO4·2H2O), brucite (Mg(OH)2), portlandite (Ca(OH)2), and goethite (α-FeOOH), in various reacting aqueous fluids containing solution species, such as arsenic, phosphate, organo- or pyrophosphate, CO2, selenium, lead, cadmium, iron, chromium, and antimony. We detected the in situ replacement of these parent mineral phases by product phases, identified through a variety of analytical methods such as Raman spectroscopy, high-resolution transmission electron microscopy, and various X-ray techniques, as well as modeling by geochemical simulation using PHREEQC. As a consequence of the coupled processes, sequestration of toxic elements and hazardous species and inorganic and organic carbon, and limiting or promoting recovery of nutrients can be achieved at nano- and macroscopic scales.We also used in situ AFM to quantitatively measure the retreat rates of molecular steps and directly observe the morphology changes of dissolution etch pits on calcium phosphates in organic acid solutions present in most rhizosphere environments. By molecular modeling using density functional theory (DFT), we explain the origin of dissolution etch pit evolution through specific stereochemistry and molecular recognition and provide an energetic basis by calculating the binding energies of chemical functionalities on organic acids to direction-specific steps on mineral surfaces. In addition, we further quantified precipitation kinetics of calcium phosphates (Ca-P's) on typical mineral surfaces at the nanoscale in environmentally relevant solutions with various organic molecules, by measurements obtained from sequential images obtained by liquid-cell AFM. In situ dynamic force spectroscopy (DFS) was used to determine binding energies of single-molecules with different chemical functionalities found in natural organic matter at mineral-fluid interfaces. Quantifying molecular organo-mineral bonding or binding energies mechanistically explains phosphate precipitation and transformation. From DFS measurements, molecular-scale interactions of mineral-natural organic matter (DNA, proteins, and polysaccharides) associations were determined. With this powerful tool, single-molecule determinations of polysaccharide-amorphous iron oxide or hematite interactions provided the mechanistic origin of the phase- or facet-dependent adsorption. These systematic investigations and findings significantly contribute to a more quantitative prediction of the fate of nutrients and contaminants, chemical element cycling, and potential geological carbon capture and nuclear waste storage in aqueous environments.
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Affiliation(s)
- Lijun Wang
- College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Christine V. Putnis
- Institut für Mineralogie, University of Münster, 48149 Münster, Germany
- School of Molecular and Life Science, Curtin University, Perth, WA 6845, Australia
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24
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Ikaite nucleation at 35 °C challenges the use of glendonite as a paleotemperature indicator. Sci Rep 2020; 10:8141. [PMID: 32424173 PMCID: PMC7235076 DOI: 10.1038/s41598-020-64751-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Accepted: 04/21/2020] [Indexed: 11/11/2022] Open
Abstract
Glendonites have been found worldwide in marine sediments from the Neoproterozoic Era to the Quaternary Period. The precursor of glendonite, ikaite (CaCO3 · 6H2O), is metastable and has only been observed in nature at temperatures <7 °C. Therefore, glendonites in the sedimentary record are commonly used as paleotemperature indicators. However, several laboratory experiments have shown that the mineral can nucleate at temperatures>7 °C. Here we investigate the nucleation range for ikaite as a function of temperature and pH. We found that ikaite precipitated at temperatures of at least 35 °C at pH 9.3 −10.3 from a mixture of natural seawater and sodium carbonate rich solution. At pH 9.3, we observed pseudomorphic replacement of ikaite by porous calcite during the duration of the experiment (c. 5 hours). These results imply that ikaite can form at relatively high temperatures but will then be rapidly replaced by a calcite pseudomorph. This finding challenges the use of glendonites as paleotemperature indicators.
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25
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Kim M, Kim HG, Kim S, Yoon JH, Sung JY, Jin JS, Lee MH, Kim CW, Heo J, Hong KS. Leaching behaviors and mechanisms of vitrified forms for the low-level radioactive solid wastes. JOURNAL OF HAZARDOUS MATERIALS 2020; 384:121296. [PMID: 31574387 DOI: 10.1016/j.jhazmat.2019.121296] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 08/03/2019] [Accepted: 09/22/2019] [Indexed: 06/10/2023]
Abstract
Leaching behaviors and mechanisms of commercialized glass wasteforms to sequester low-level solid-wastes were investigated: SG glass for resin waste and DG-2 glass for dry active waste. After ANS 16.1 leaching test, leachabilities of the nuclides, Co, Cs, and Sr, were all lager than 14, which met the requirement of the US-Nuclear Regulatory Commission. Holes of diameters 5-10 μm remained on the surface of the SG and crevices of lengths 10-50 μm were observed on the surface of the DG-2. We analyzed elemental compositions of the SG and the DG-2 with depths. For the SG, Si, Al, Ca, and Mg were accumulated and Na was depleted up to nearly 1.5 μm compared to an internal glass. For the DG-2, concentrations of B, Na, Al, Ca and Sr started to decrease from 2.5 μm even though other minor elements are still remained their concentrations. We suggested leaching mechanisms: alkali elements including H would diffuse through the holes on the SG, while most of the elements including Si and Al would diffuse through the crevices on the DG-2.
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Affiliation(s)
- Miae Kim
- Busan Center, Korea Basic Science Institute, Busan, 46742, Republic of Korea.
| | - Hyun Gyu Kim
- Busan Center, Korea Basic Science Institute, Busan, 46742, Republic of Korea
| | - Shin Kim
- Busan Center, Korea Basic Science Institute, Busan, 46742, Republic of Korea
| | - Jang-Hee Yoon
- Busan Center, Korea Basic Science Institute, Busan, 46742, Republic of Korea
| | - Ji Yeong Sung
- Busan Center, Korea Basic Science Institute, Busan, 46742, Republic of Korea
| | - Jong Sung Jin
- Busan Center, Korea Basic Science Institute, Busan, 46742, Republic of Korea
| | - Mi-Hyun Lee
- Central Research Institute, Korea Hydro & Nuclear Power, Daejeon, 34101, Republic of Korea
| | - Cheon-Woo Kim
- Central Research Institute, Korea Hydro & Nuclear Power, Daejeon, 34101, Republic of Korea
| | - Jong Heo
- Department of Materials Science and Engineering and Division of Advanced Nuclear Engineering, Pohang University of Science and Technology, Pohang, 37673, Republic of Korea
| | - Kyong-Soo Hong
- Busan Center, Korea Basic Science Institute, Busan, 46742, Republic of Korea.
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26
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Lönartz MI, Dohmen L, Lenting C, Trautmann C, Lang M, Geisler T. The Effect of Heavy Ion Irradiation on the Forward Dissolution Rate of Borosilicate Glasses Studied in Situ and Real Time by Fluid-Cell Raman Spectroscopy. MATERIALS (BASEL, SWITZERLAND) 2019; 12:E1480. [PMID: 31067785 PMCID: PMC6539277 DOI: 10.3390/ma12091480] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 04/29/2019] [Accepted: 05/01/2019] [Indexed: 11/17/2022]
Abstract
Borosilicate glasses are the favored material for immobilization of high-level nuclear waste (HLW) from the reprocessing of spent fuel used in nuclear power plants. To assess the long-term stability of nuclear waste glasses, it is crucial to understand how self-irradiation affects the structural state of the glass and influences its dissolution behavior. In this study, we focus on the effect of heavy ion irradiation on the forward dissolution rate of a non-radioactive ternary borosilicate glass. To create extended radiation defects, the glass was subjected to heavy ion irradiation using 197Au ions that penetrated ~50 µm deep into the glass. The structural damage was characterized by Raman spectroscopy, revealing a significant depolymerization of the silicate and borate network in the irradiated glass and a reduction of the average boron coordination number. Real time, in situ fluid-cell Raman spectroscopic corrosion experiments were performed with the irradiated glass in a silica-undersaturated, 0.5 M NaHCO3 solution at temperatures between 80 and 85 °C (initial pH = 7.1). The time- and space-resolved in situ Raman data revealed a 3.7 ± 0.5 times increased forward dissolution rate for the irradiated glass compared to the non-irradiated glass, demonstrating a significant impact of irradiation-induced structural damage on the dissolution kinetics.
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Affiliation(s)
- Mara Iris Lönartz
- Institut für Geowissenschaften und Meteorologie, Universität Bonn, Poppelsdorfer Schloss, Meckenheimer Allee 169, 53115 Bonn, Germany.
| | - Lars Dohmen
- SCHOTT AG, Hattenbergstr. 10, 55122 Mainz, Germany.
| | - Christoph Lenting
- Institut für Geowissenschaften und Meteorologie, Universität Bonn, Poppelsdorfer Schloss, Meckenheimer Allee 169, 53115 Bonn, Germany.
| | - Christina Trautmann
- GSI Helmholtzzentrum, 64291 Darmstadt and Technische Universität Darmstadt, 64287 Darmstadt, Germany.
| | - Maik Lang
- Department of Nuclear Engineering, University of Tennessee, Knoxville, TN 37996, USA.
| | - Thorsten Geisler
- Institut für Geowissenschaften und Meteorologie, Universität Bonn, Poppelsdorfer Schloss, Meckenheimer Allee 169, 53115 Bonn, Germany.
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27
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An Assessment of Initial Leaching Characteristics of Alkali-Borosilicate Glasses for Nuclear Waste Immobilization. MATERIALS 2019; 12:ma12091462. [PMID: 31064148 PMCID: PMC6539539 DOI: 10.3390/ma12091462] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Revised: 04/29/2019] [Accepted: 05/02/2019] [Indexed: 11/17/2022]
Abstract
Initial leaching characteristics of simulated nuclear waste immobilized in three alkali- borosilicate glasses (ABS-waste) were studied. The effects of matrix composition on the containment performance and degradation resistance measures were evaluated. Normalized release rates are in conformance with data reported in the literature. High Li and Mg loadings lead to the highest initial de-polymerization of sample ABS-waste (17) and contributed to its thermodynamic instability. Ca stabilizes non-bridging oxygen (NBO) and reduces the thermodynamic instability of the modified matrix. An exponential temporal change in the alteration thickness was noted for samples ABS-waste (17) and Modified Alkali-Borosilicate (MABS)-waste (20), whereas a linear temporal change was noted for sample ABS-waste (25). Leaching processes that contribute to the fractional release of all studied elements within the initial stage of glass corrosion were quantified and the main controlling leach process for each element was identified. As the waste loading increases, the contribution of the dissolution process to the overall fractional release of structural elements decreases by 43.44, 5.05, 38.07, and 52.99% for Si, B, Na, and Li respectively, and the presence of modifiers reduces this contribution for all the studied metalloids. The dissolution process plays an important role in controlling the release of Li and Cs, and this role is reduced by increasing the waste loading.
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Nagy N. Contact Angle Determination on Hydrophilic and Superhydrophilic Surfaces by Using r-θ-Type Capillary Bridges. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:5202-5212. [PMID: 30916567 DOI: 10.1021/acs.langmuir.9b00442] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
To avoid the restrictions of the captive bubble and the Wilhelmy plate techniques, a method was introduced for contact angle measurements under equilibrium conditions. It enables to determine even ultralow contact angles with high precision without prewetting the investigated surface because in this case, the capillary bridge of the test liquid is formed from a pendant drop and used as a probe. The contact angle is determined from the measured capillary force and liquid bridge geometry by using Delaunay's analytical solution. The method was experimentally proved to be valid. As a demonstration, contact angles less than 1° were measured with the uncertainty down to 0.1° on lightly corroded glass surfaces. Moreover, a new observation was obtained in complete wetting situations: the receding contact line starts to advance again during the increase of the bridge length. The contact angle is much lower in this readvancing phase compared to the advancing and receding values because the contact line finds prewetted surface in front of itself. Further advantage of the method is that the existing contact angle goniometers can be developed further into the presented measurement setup.
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Affiliation(s)
- Norbert Nagy
- Institute of Technical Physics and Materials Science , HAS Centre for Energy Research , P.O. Box 49, H-1525 Budapest , Hungary
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29
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Geisler T, Dohmen L, Lenting C, Fritzsche MBK. Real-time in situ observations of reaction and transport phenomena during silicate glass corrosion by fluid-cell Raman spectroscopy. NATURE MATERIALS 2019; 18:342-348. [PMID: 30804507 DOI: 10.1038/s41563-019-0293-8] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Accepted: 01/18/2019] [Indexed: 06/09/2023]
Abstract
Borosilicate glass is an important material used in various industries due to its chemical durability, such as for the immobilization of high-level nuclear waste. However, it is susceptible to aqueous corrosion, recognizable by the formation of surface alteration layers (SALs). Here, we report in situ fluid-cell Raman spectroscopic experiments providing real-time insights into reaction and transport processes during the aqueous corrosion of a borosilicate glass. The formation of a several-micrometre-thick water-rich zone between the SAL and the glass, interpreted as an interface solution, is detected, as well as pH gradients at the glass surface and within the SAL. By replacing the solution with a deuterated solution, it is observed that water transport through the SAL is not rate-limiting. The data support an interface-coupled dissolution-reprecipitation process for SAL formation. Fluid-cell Raman spectroscopic experiments open up new avenues for studying solid-water reactions, with the ability to in situ trace specific sub-processes in real time by using stable isotopes.
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Affiliation(s)
- Thorsten Geisler
- Institute for Geosciences and Meteorology, University of Bonn, Bonn, Germany.
| | - Lars Dohmen
- Institute for Geosciences and Meteorology, University of Bonn, Bonn, Germany
- Schott AG, Mainz, Germany
| | - Christoph Lenting
- Institute for Geosciences and Meteorology, University of Bonn, Bonn, Germany
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30
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Schreiber DK, Perea DE, Ryan JV, Evans JE, Vienna JD. A method for site-specific and cryogenic specimen fabrication of liquid/solid interfaces for atom probe tomography. Ultramicroscopy 2018; 194:89-99. [PMID: 30092393 DOI: 10.1016/j.ultramic.2018.07.010] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Revised: 07/09/2018] [Accepted: 07/22/2018] [Indexed: 11/17/2022]
Abstract
A site-specific, cryogenic, focused ion beam (FIB) method is presented for the preparation of atom probe tomography (APT) specimens from a frozen liquid/solid interface. As a practical example, the interface between water and a corroded boroaluminosilicate glass has been characterized by APT for the first time. The water/glass interface is preserved throughout specimen preparation by plunge freezing the corroding glass particles with the corrosion solution into slush nitrogen. Site-specific specimen preparation is enabled through a new approach to extract and mount a small volume of material using a cryogenically cooled FIB stage and micromanipulator. The prepared APT specimens are subsequently transferred from the FIB to APT under cryogenic and high-vacuum conditions using a novel FIB/APT transfer shuttle and home-built environmental transfer hub attached to the APT system. Particular focus is given to the technical methods for specimen fabrication under cryogenic conditions. Persistent challenges are discussed in addition to future opportunities for this new specimen preparation method.
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Affiliation(s)
- D K Schreiber
- Energy and Environment Directorate, Pacific Northwest National Laboratory, P.O. Box 999, Richland, WA 99352, USA.
| | - D E Perea
- Earth and Biological Sciences Directorate, Pacific Northwest National Laboratory, P.O. Box 999 Richland, WA 99352, USA.
| | - J V Ryan
- Energy and Environment Directorate, Pacific Northwest National Laboratory, P.O. Box 999, Richland, WA 99352, USA
| | - J E Evans
- Earth and Biological Sciences Directorate, Pacific Northwest National Laboratory, P.O. Box 999 Richland, WA 99352, USA
| | - J D Vienna
- Energy and Environment Directorate, Pacific Northwest National Laboratory, P.O. Box 999, Richland, WA 99352, USA
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31
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Dynamics of self-reorganization explains passivation of silicate glasses. Nat Commun 2018; 9:2169. [PMID: 29867088 PMCID: PMC5986767 DOI: 10.1038/s41467-018-04511-2] [Citation(s) in RCA: 80] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Accepted: 04/10/2018] [Indexed: 11/15/2022] Open
Abstract
Understanding the dissolution of silicate glasses and minerals from atomic to macroscopic levels is a challenge with major implications in geoscience and industry. One of the main uncertainties limiting the development of predictive models lies in the formation of an amorphous surface layer––called gel––that can in some circumstances control the reactivity of the buried interface. Here, we report experimental and simulation results deciphering the mechanisms by which the gel becomes passivating. The study conducted on a six-oxide borosilicate glass shows that gel reorganization involving high exchange rate of oxygen and low exchange rate of silicon is the key mechanism accounting for extremely low apparent water diffusivity (∼10−21 m2 s−1), which could be rate-limiting for the overall reaction. These findings could be used to improve kinetic models, and inspire the development of new molecular sieve materials with tailored properties as well as highly durable glass for application in extreme environments. Deciphering the dissolution process of silicate glasses and minerals from atomic to macroscopic scales is a major challenge. Here, the authors explain the passivating properties of the gel layer by its reorganization, which is a key mechanism accounting for very low apparent water diffusivity.
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32
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Xiao Z, Sun X, Li X, Wang Y, Wang Z, Zhang B, Li XL, Shen Z, Kong LB, Huang Y. Phase Transformation of GeO 2 Glass to Nanocrystals under Ambient Conditions. NANO LETTERS 2018; 18:3290-3296. [PMID: 29667834 DOI: 10.1021/acs.nanolett.8b01142] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Theoretically, the accomplishment of phase transformation requires sufficient energy to overcome the barriers of structure rearrangements. The transition of an amorphous structure to a crystalline structure is implemented traditionally by heating at high temperatures. However, phase transformation under ambient condition without involving external energy has not been reported. Here, we demonstrate that the phase transformation of GeO2 glass to nanocrystals can be triggered at ambient conditions when subjected to aqueous environments. In this case, continuous chemical reactions between amorphous GeO2 and water are responsible for the amorphous-to-crystalline transition. The dynamic evolution process is monitored by using in situ liquid-cell transmission electron microscopy, clearly revealing this phase transformation. It is the hydrolysis of amorphous GeO2 that leads to the formation of clusters with a size of ∼0.4 nm, followed by the development of dense liquid clusters, which subsequently aggregate to facilitate the nucleation and growth of GeO2 nanocrystals. Our finding breaks the traditional understanding of phase transformation and will bring about a significant revolution and contribution to the classical glass-crystallization theories.
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Affiliation(s)
- Zhuohao Xiao
- School of Materials Science and Engineering , Jingdezhen Ceramic Institute , Jingdezhen 333001 , China
| | - Xinyuan Sun
- Department of Physics , Jinggangshan University , Ji'an 343009 , China
| | - Xiuying Li
- School of Materials Science and Engineering , Jingdezhen Ceramic Institute , Jingdezhen 333001 , China
| | - Yongqing Wang
- School of Materials Science and Engineering , Jingdezhen Ceramic Institute , Jingdezhen 333001 , China
| | - Zhiqiang Wang
- School of Materials Science and Engineering , Nanyang Technological University , Singapore 639798 , Singapore
| | - Bowei Zhang
- School of Materials Science and Engineering , Nanyang Technological University , Singapore 639798 , Singapore
| | - Xiang Lin Li
- School of Materials Science and Engineering , Nanyang Technological University , Singapore 639798 , Singapore
| | - Zexiang Shen
- School of Materials Science and Engineering , Nanyang Technological University , Singapore 639798 , Singapore
| | - Ling Bing Kong
- School of Materials Science and Engineering , Nanyang Technological University , Singapore 639798 , Singapore
| | - Yizhong Huang
- School of Materials Science and Engineering , Nanyang Technological University , Singapore 639798 , Singapore
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33
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Ochiai A, Imoto J, Suetake M, Komiya T, Furuki G, Ikehara R, Yamasaki S, Law GTW, Ohnuki T, Grambow B, Ewing RC, Utsunomiya S. Uranium Dioxides and Debris Fragments Released to the Environment with Cesium-Rich Microparticles from the Fukushima Daiichi Nuclear Power Plant. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:2586-2594. [PMID: 29378406 DOI: 10.1021/acs.est.7b06309] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Trace U was released from the Fukushima Daiichi Nuclear Power Plant (FDNPP) during the meltdowns, but the speciation of the released components of the nuclear fuel remains unknown. We report, for the first time, the atomic-scale characteristics of nanofragments of the nuclear fuels that were released from the FDNPP into the environment. Nanofragments of an intrinsic U-phase were discovered to be closely associated with radioactive cesium-rich microparticles (CsMPs) in paddy soils collected ∼4 km from the FDNPP. The nanoscale fuel fragments were either encapsulated by or attached to CsMPs and occurred in two different forms: (i) UO2+X nanocrystals of ∼70 nm size, which are embedded into magnetite associated with Tc and Mo on the surface and (ii) Isometric (U,Zr)O2+X nanocrystals of ∼200 nm size, with the U/(U+Zr) molar ratio ranging from 0.14 to 0.91, with intrinsic pores (∼6 nm), indicating the entrapment of vapors or fission-product gases during crystallization. These results document the heterogeneous physical and chemical properties of debris at the nanoscale, which is a mixture of melted fuel and reactor materials, reflecting the complex thermal processes within the FDNPP reactor during meltdown. Still CsMPs are an important medium for the transport of debris fragments into the environment in a respirable form.
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Affiliation(s)
- Asumi Ochiai
- Department of Chemistry , Kyushu University , 744 Motooka , Nishi-ku, Fukuoka 819-0395 , Japan
| | - Junpei Imoto
- Department of Chemistry , Kyushu University , 744 Motooka , Nishi-ku, Fukuoka 819-0395 , Japan
| | - Mizuki Suetake
- Department of Chemistry , Kyushu University , 744 Motooka , Nishi-ku, Fukuoka 819-0395 , Japan
| | - Tatsuki Komiya
- Department of Chemistry , Kyushu University , 744 Motooka , Nishi-ku, Fukuoka 819-0395 , Japan
| | - Genki Furuki
- Department of Chemistry , Kyushu University , 744 Motooka , Nishi-ku, Fukuoka 819-0395 , Japan
| | - Ryohei Ikehara
- Department of Chemistry , Kyushu University , 744 Motooka , Nishi-ku, Fukuoka 819-0395 , Japan
| | - Shinya Yamasaki
- Faculty of Pure and Applied Sciences and Center for Research in Isotopes and Environmental Dynamics , University of Tsukuba , 1-1-1 Tennodai , Tsukuba , Ibaraki 305-8577 , Japan
| | - Gareth T W Law
- Centre for Radiochemistry Research, School of Chemistry , The University of Manchester , Oxford Road , Manchester M13 9PL , United Kingdom
| | - Toshihiko Ohnuki
- Laboratory for Advanced Nuclear Energy, Institute of Innovative Research , Tokyo Institute of Technology , 2-12-1 Ookayama , Meguro-ku, Tokyo 152-8550 , Japan
| | - Bernd Grambow
- SUBATECH, IMT Atlantique, CNRS-IN2P3 , University of Nantes , Nantes 44307 , France
| | - Rodney C Ewing
- Department of Geological Sciences and Center for International Security and Cooperation , Stanford University , Stanford , California 94305-2115 , United States
| | - Satoshi Utsunomiya
- Department of Chemistry , Kyushu University , 744 Motooka , Nishi-ku, Fukuoka 819-0395 , Japan
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34
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Mechanical wear and oxidative degradation analysis of retrieved ultra high molecular weight polyethylene acetabular cups. J Mech Behav Biomed Mater 2018; 79:314-323. [DOI: 10.1016/j.jmbbm.2018.01.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Accepted: 01/03/2018] [Indexed: 11/19/2022]
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35
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Molecular Dynamics Simulation of Water Confinement in Disordered Aluminosilicate Subnanopores. Sci Rep 2018; 8:3761. [PMID: 29491348 PMCID: PMC5830603 DOI: 10.1038/s41598-018-22015-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Accepted: 02/15/2018] [Indexed: 11/17/2022] Open
Abstract
The porous structure and mass transport characteristics of disordered silicate porous media were investigated via a geometry based analysis of water confined in the pores. Disordered silicate porous media were constructed to mimic the dissolution behavior of an alkali aluminoborosilicate glass, i.e., soluble Na and B were removed from the bulk glass, and then water molecules and Na were introduced into the pores to provide a complex porous structure filled with water. This modelling approach revealed large surface areas of disordered porous media. In addition, a number of isolated water molecules were observed in the pores, despite accessible porous connectivity. As the fraction of mobile water was approximately 1%, the main water dynamics corresponded to vibrational motion in a confined space. This significantly reduced water mobility was due to strong hydrogen-bonding water-surface interactions resulting from the large surface area. This original approach provides a method for predicting the porous structure and water transport characteristics of disordered silicate porous media.
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36
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Gong Y, Xu J, Buchanan RC. Surface roughness: A review of its measurement at micro-/nano-scale. PHYSICAL SCIENCES REVIEWS 2018. [DOI: 10.1515/psr-2017-0057] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractThe measurement of surface roughness at micro-/nano-scale is of great importance to metrological, manufacturing, engineering, and scientific applications given the critical roles of roughness in physical and chemical phenomena. The surface roughness of materials can significantly change the way of how they interact with light, phonons, molecules, and so forth, thus surface roughness ultimately determines the functionality and property of materials. In this short review, the techniques of measuring micro-/nano-scale surface roughness are discussed with special focus on the limitations and capabilities of each technique. In addition, the calculations of surface roughness and their theoretical background are discussed to offer readers a better understanding of the importance of post-measurement analysis. Recent progress on fractal analysis of surface roughness is discussed to shed light on the future efforts in surface roughness measurement.
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37
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Suzuki-Muresan T, Abdelouas A, Landesman C, Ait-Chaou A, El Mendili Y, Ribet S, Perrigaud K, Shitara D, Martin C, Bourbon X. Alteration of vitrified intermediate level nuclear waste in alkaline media: effects of cementitious materials, pH and temperature. RSC Adv 2018; 8:37665-37680. [PMID: 35558608 PMCID: PMC9089322 DOI: 10.1039/c8ra05227a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Accepted: 10/09/2018] [Indexed: 11/21/2022] Open
Abstract
Alteration experiments involving intermediate level nuclear waste (ILW) glass in contact with hardened cement paste (HCP) were performed to assess its behavior under simulated repository conditions. Batch experiments were conducted at 20 °C and 50 °C in several artificial cement pore water (ACW) samples (pH from 10 to 13), in the presence of HCP (CEM-I, CEM-V and low pH), with a ratio of glass surface to volume of solution of 8000 m−1 and a ratio of mass of HCP to volume of solution of 10 g L−1. Glass alteration rates increase up to ∼4 × 10−2 g m−2 d−1 with pH in contact with HCP, notably with CEM-I. This value decreases by 2 orders of magnitude in low pH cement solution and also for residual alteration rates. The effect of calcium on glass alteration was observed, mainly in Ca(OH)2 saturated solution, with an incubation effect on the release of Si in solution. Experimental data were successfully modeled with the PhreeqC geochemical code. Glass and HCP samples were characterized via SEM/EDX and micro-Raman studies. This work showed that vitrified glass exhibits good performance in terms of low alteration rates (∼10−4 g m−2 d−1), the absence of secondary phases, and the formation of a gel layer at the surface, when in contact with low pH conditions (in the presence or absence of low pH HCP). Alteration experiments involving intermediate level nuclear waste (ILW) glass in contact with hardened cement paste (HCP) were performed to assess its behavior under simulated repository conditions.![]()
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Affiliation(s)
- Tomo Suzuki-Muresan
- SUBATECH (IMT Atlantique, CNRS/IN2P3, Université de Nantes)
- 44307 Nantes cedex 3
- France
| | - A. Abdelouas
- SUBATECH (IMT Atlantique, CNRS/IN2P3, Université de Nantes)
- 44307 Nantes cedex 3
- France
| | - C. Landesman
- SUBATECH (IMT Atlantique, CNRS/IN2P3, Université de Nantes)
- 44307 Nantes cedex 3
- France
| | - A. Ait-Chaou
- SUBATECH (IMT Atlantique, CNRS/IN2P3, Université de Nantes)
- 44307 Nantes cedex 3
- France
| | - Y. El Mendili
- SUBATECH (IMT Atlantique, CNRS/IN2P3, Université de Nantes)
- 44307 Nantes cedex 3
- France
| | - S. Ribet
- SUBATECH (IMT Atlantique, CNRS/IN2P3, Université de Nantes)
- 44307 Nantes cedex 3
- France
| | - K. Perrigaud
- SUBATECH (IMT Atlantique, CNRS/IN2P3, Université de Nantes)
- 44307 Nantes cedex 3
- France
| | - D. Shitara
- Division of Energy and Environmental Systems
- Graduate School of Engineering
- Hokkaido University
- Sapporo
- Japan
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38
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Macià Escatllar A, Ugliengo P, Bromley ST. Modeling hydroxylated nanosilica: Testing the performance of ReaxFF and FFSiOH force fields. J Chem Phys 2017; 146:224704. [DOI: 10.1063/1.4985083] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Affiliation(s)
- Antoni Macià Escatllar
- Departament de Ciència de Materials i Química Física and Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, E-08028 Barcelona, Spain
| | - Piero Ugliengo
- Dipartimento di Chimica and NIS Centre, Università degli Studi di Torino, 10125 Torino, Italy
| | - Stefan T. Bromley
- Departament de Ciència de Materials i Química Física and Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, E-08028 Barcelona, Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA), E-08010 Barcelona, Spain
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39
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Kim T, Fu X, Warther D, Sailor MJ. Size-Controlled Pd Nanoparticle Catalysts Prepared by Galvanic Displacement into a Porous Si-Iron Oxide Nanoparticle Host. ACS NANO 2017; 11:2773-2784. [PMID: 28195692 DOI: 10.1021/acsnano.6b07820] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Porous silicon nanoparticles containing both Pd and iron oxide nanoparticles are prepared and studied as magnetically recoverable catalysts for organic reductions. The Pd nanoparticles are generated in situ by electroless deposition of Pd(NH3)42+, where the porous Si skeleton acts as both a template and as a reducing agent and the released ammonia ligands raise the local pH to exert control over the size of the Pd nanoparticles. The nanocomposites are characterized by transmission electron microscopy, energy-dispersive X-ray spectroscopy, nitrogen adsorption, X-ray diffraction, superconducting quantum interference device magnetization, and dynamic light scattering. The nanocomposite consists of a porous Si nanoparticle (150 nm mean diameter) containing ∼20 nm pores, uniformly decorated with a high loading of surfactant-free Pd nanoparticles (12 nm mean diameter) and superparamagnetic γ-Fe2O3 nanoparticles (∼7 nm mean diameter). The reduction of 4-nitrophenol to 4-aminophenol by sodium borohydride is catalyzed by the nanocomposite, which is stable through the course of the reaction. Catalytic reduction of the organic dyes methylene blue and rhodamine B is also demonstrated. The conversion efficiency and catalytic activity are found to be superior to a commercial Pd/C catalyst compared under comparable reaction conditions. The composite catalyst can be recovered from the reaction mixture by applying an external magnetic field due to the existence of the superparamagnetic iron oxide nanoparticles in the construct. The recovered particles retain their catalytic activity.
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Affiliation(s)
- Taeho Kim
- Department of Chemistry and Biochemistry and ‡Department of Nanoengineering, University of California, San Diego , La Jolla, California 92093, United States
| | - Xin Fu
- Department of Chemistry and Biochemistry and ‡Department of Nanoengineering, University of California, San Diego , La Jolla, California 92093, United States
| | - David Warther
- Department of Chemistry and Biochemistry and ‡Department of Nanoengineering, University of California, San Diego , La Jolla, California 92093, United States
| | - Michael J Sailor
- Department of Chemistry and Biochemistry and ‡Department of Nanoengineering, University of California, San Diego , La Jolla, California 92093, United States
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40
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Graham UM, Jacobs G, Yokel RA, Davis BH, Dozier AK, Birch ME, Tseng MT, Oberdörster G, Elder A, DeLouise L. From Dose to Response: In Vivo Nanoparticle Processing and Potential Toxicity. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 947:71-100. [PMID: 28168666 PMCID: PMC6376403 DOI: 10.1007/978-3-319-47754-1_4] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Adverse human health impacts due to occupational and environmental exposures to manufactured nanoparticles are of concern and pose a potential threat to the continued industrial use and integration of nanomaterials into commercial products. This chapter addresses the inter-relationship between dose and response and will elucidate on how the dynamic chemical and physical transformation and breakdown of the nanoparticles at the cellular and subcellular levels can lead to the in vivo formation of new reaction products. The dose-response relationship is complicated by the continuous physicochemical transformations in the nanoparticles induced by the dynamics of the biological system, where dose, bio-processing, and response are related in a non-linear manner. Nanoscale alterations are monitored using high-resolution imaging combined with in situ elemental analysis and emphasis is placed on the importance of the precision of characterization. The result is an in-depth understanding of the starting particles, the particle transformation in a biological environment, and the physiological response.
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Affiliation(s)
- Uschi M Graham
- University of Kentucky, Lexington, KY, USA.
- CDC/NIOSH DART, Cincinnati, OH, USA.
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41
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Yuan K, Lee SS, De Andrade V, Sturchio NC, Fenter P. Replacement of Calcite (CaCO 3) by Cerussite (PbCO 3). ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:12984-12991. [PMID: 27767299 DOI: 10.1021/acs.est.6b03911] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The mobility of toxic elements, such as lead (Pb) can be attenuated by adsorption, incorporation, and precipitation on carbonate minerals in subsurface environments. Here, we report a study of the bulk transformation of single-crystal calcite (CaCO3) into polycrystalline cerussite (PbCO3) through reaction with acidic Pb-bearing solutions. This reaction began with the growth of a cerussite shell on top of calcite surfaces followed by the replacement of the remaining calcite core. The external shape of the original calcite was preserved by a balance between calcite dissolution and cerussite growth controlled by adjusting the Pb2+ concentration and pH. The relation between the rounded calcite core and the surrounding lath-shaped cerussite aggregates was imaged by transmission X-ray microscopy, which revealed preferentially elongated cerussite crystals parallel to the surface and edge directions of calcite. The replacement reaction involved concurrent development of ∼100 nm wide pores parallel to calcite c-glide or (12̅0) planes, which may have provided permeability for chemical exchange during the reaction. X-ray reflectivity measurements showed no clear epitaxial relation of cerussite to the calcite (104) surface. These results demonstrate Pb sequestration through mineral replacement reactions and the critical role of nanoporosity (3% by volume) on the solid phase transformation through a dissolution-recrystallization mechanism.
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Affiliation(s)
| | | | | | - Neil C Sturchio
- Department of Geological Sciences, University of Delaware , Newark, Delaware 19716, United States
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42
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Leonard DN, Hellmann R. Exploring dynamic surface processes during silicate mineral (wollastonite) dissolution with liquid cell TEM. J Microsc 2016; 265:358-371. [PMID: 27918627 DOI: 10.1111/jmi.12509] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Revised: 09/02/2016] [Accepted: 10/24/2016] [Indexed: 11/29/2022]
Abstract
Most liquid cell transmission electron microscopy (LC TEM) studies focus on nanoparticles or nanowires, in large part because the preparation and study of materials in this size range is straightforward. By contrast, this is not true for samples in the micrometre size range, in large part because of the difficulties associated with sample preparation starting from a 'bulk' material. There are also many advantages inherent to the study of micrometre-sized samples compared to their nanometre-sized counterparts. Here, we present a liquid cell transmission electron study that employed an innovative sample preparation technique using focused ion beam (FIB) milling to fabricate micrometre-sized electron transparent lamellae that were then welded to the liquid cell substrate. This technique, for which we have described in detail all of the fabrication steps, allows for samples having dimensions of several square micrometres to be observed by TEM in situ in a liquid. We applied this technique to test whether we could observe and measure in situ dissolution of a crystalline material called wollastonite, a calcium silicate mineral. More specifically, this study was used to observe and record surface dynamics associated with step and terrace edge movement, which are ultimately linked to the overall rate of dissolution. The wollastonite lamella underwent chemical reactions in pure deionized water at ambient temperature in a liquid cell with a 5-μm-spacer thickness. The movement of surface steps and terraces was measured periodically over a period of almost 5 h. Quite unexpectedly, the one-dimensional rates of retreat of these surface features were not constant, but changed over time. In addition, there were noticeable quantitative differences in retreat rates as a function crystallographic orientation, indicating that surface retreat is anisotropic. Several bulk rates of dissolution were also determined (1.6-4.2 • 10-7 mol m-2 s-1 ) using the rates of retreat of representative terraces and steps, and were found to be within one order of magnitude of dissolution rates in the literature based on aqueous chemistry data.
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Affiliation(s)
- D N Leonard
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, U.S.A
| | - R Hellmann
- ISTerre (Institute for Earth Sciences), Université Grenoble Alpes, Grenoble, France.,ISTerre, CNRS-UMR, 5275, Grenoble, France
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Kim T, Braun GB, She ZG, Hussain S, Ruoslahti E, Sailor MJ. Composite Porous Silicon-Silver Nanoparticles as Theranostic Antibacterial Agents. ACS APPLIED MATERIALS & INTERFACES 2016; 8:30449-30457. [PMID: 27754645 DOI: 10.1021/acsami.6b09518] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A theranostic nanoparticle with biochemically triggered antibacterial activity is demonstrated. Metallic silver is deposited onto porous silicon nanoparticles (pSiNPs) by galvanic displacement. When aqueous diaminesilver ([Ag(NH3)2]+) is used as a silver source, the pSiNPs template the crystalline silver as small (mean diameter 13 nm) and well-dispersed nanoparticles embedded within and on the larger (100 nm) pSiNPs. The silver nanoparticles (AgNPs) quench intrinsic photoluminescence (PL) from the porous silicon (pSi) matrix. When exposed to an aqueous oxidant, the AgNPs are preferentially etched, Ag+ is released into solution, and PL from the pSi carrier is recovered. The released Ag+ results in 90% killing of (Gram-negative) Pseudomonas aeruginosa and (Gram-positive) Staphylococcus aureus within 3 h. When conjugated with the TAT peptide (sequence RKKRRQRRR), the silver-deposited porous silicon (pSi-Ag) nanocomposite shows distinct targeting toward S. aureus bacteria in vitro. Intravenously injected TAT-conjugated pSi-Ag nanoparticles accumulate in the liver, spleen, and lungs of mice, and the in vivo release of Ag+ and recovery of PL from pSi are demonstrated by the subsequent intraperitoneal administration of a hexacyanoferrate solution. The released Ag+ leads to a significant bacterial count reduction in liver tissue relative to the control. The data demonstrate the feasibility of the targeted and triggered delivery of antibacterial Ag+ ion in vivo, using a self-reporting and nontoxic nanocarrier.
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Affiliation(s)
- Taeho Kim
- Department of Chemistry and Biochemistry, University of California, San Diego , La Jolla, California 92093, United States
| | - Gary B Braun
- Cancer Research Center, Sanford Burnham Prebys Medical Discovery Institute , La Jolla, California 92037, United States
- Center for Nanomedicine and Department of Cell, Molecular and Developmental Biology, University of California, Santa Barbara , Santa Barbara, California 93106-9610, United States
| | - Zhi-Gang She
- Cancer Research Center, Sanford Burnham Prebys Medical Discovery Institute , La Jolla, California 92037, United States
| | - Sazid Hussain
- Cancer Research Center, Sanford Burnham Prebys Medical Discovery Institute , La Jolla, California 92037, United States
| | - Erkki Ruoslahti
- Cancer Research Center, Sanford Burnham Prebys Medical Discovery Institute , La Jolla, California 92037, United States
- Center for Nanomedicine and Department of Cell, Molecular and Developmental Biology, University of California, Santa Barbara , Santa Barbara, California 93106-9610, United States
| | - Michael J Sailor
- Department of Chemistry and Biochemistry, University of California, San Diego , La Jolla, California 92093, United States
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Nonlinear dynamics and instability of aqueous dissolution of silicate glasses and minerals. Sci Rep 2016; 6:30256. [PMID: 27443508 PMCID: PMC4957211 DOI: 10.1038/srep30256] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Accepted: 07/01/2016] [Indexed: 11/30/2022] Open
Abstract
Aqueous dissolution of silicate glasses and minerals plays a critical role in global biogeochemical cycles and climate evolution. The reactivity of these materials is also important to numerous engineering applications including nuclear waste disposal. The dissolution process has long been considered to be controlled by a leached surface layer in which cations in the silicate framework are gradually leached out and replaced by protons from the solution. This view has recently been challenged by observations of extremely sharp corrosion fronts and oscillatory zonings in altered rims of the materials, suggesting that corrosion of these materials may proceed directly through congruent dissolution followed by secondary mineral precipitation. Here we show that complex silicate material dissolution behaviors can emerge from a simple positive feedback between dissolution-induced cation release and cation-enhanced dissolution kinetics. This self-accelerating mechanism enables a systematic prediction of the occurrence of sharp dissolution fronts (vs. leached surface layers), oscillatory dissolution behaviors and multiple stages of glass dissolution (in particular the alteration resumption at a late stage of a corrosion process). Our work provides a new perspective for predicting long-term silicate weathering rates in actual geochemical systems and developing durable silicate materials for various engineering applications.
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Wang Z, Liu J, Zhou Y, Neeway JJ, Schreiber DK, Crum JV, Ryan JV, Wang XL, Wang F, Zhu Z. Nanoscale imaging of Li and B in nuclear waste glass, a comparison of ToF-SIMS, NanoSIMS, and APT. SURF INTERFACE ANAL 2016. [DOI: 10.1002/sia.6049] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Zhaoying Wang
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Analytical Chemistry for Living Biosystems, Beijing Centre for Mass Spectrometry, Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
- Environmental Molecular Sciences Laboratory; Pacific Northwest National Laboratory; Richland WA 99352 USA
| | - Jia Liu
- Environmental Molecular Sciences Laboratory; Pacific Northwest National Laboratory; Richland WA 99352 USA
| | - Yufan Zhou
- Environmental Molecular Sciences Laboratory; Pacific Northwest National Laboratory; Richland WA 99352 USA
- School of Physics, State Key Laboratory of Crystal Materials & Key Laboratory of Particle Physics and Particle Irradiation (MOE); Shandong University; Jinan 250100 China
| | - James J. Neeway
- Energy and Environment Directorate; Pacific Northwest National Laboratory; Richland WA 99352 USA
| | - Daniel K. Schreiber
- Energy and Environment Directorate; Pacific Northwest National Laboratory; Richland WA 99352 USA
| | - Jarrod V. Crum
- Energy and Environment Directorate; Pacific Northwest National Laboratory; Richland WA 99352 USA
| | - Joseph V. Ryan
- Energy and Environment Directorate; Pacific Northwest National Laboratory; Richland WA 99352 USA
| | - Xue-Lin Wang
- School of Physics, State Key Laboratory of Crystal Materials & Key Laboratory of Particle Physics and Particle Irradiation (MOE); Shandong University; Jinan 250100 China
| | - Fuyi Wang
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Analytical Chemistry for Living Biosystems, Beijing Centre for Mass Spectrometry, Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
| | - Zihua Zhu
- Environmental Molecular Sciences Laboratory; Pacific Northwest National Laboratory; Richland WA 99352 USA
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Kar A, McEldrew M, Stout RF, Mays BE, Khair A, Velegol D, Gorski CA. Self-Generated Electrokinetic Fluid Flows during Pseudomorphic Mineral Replacement Reactions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:5233-5240. [PMID: 27196633 DOI: 10.1021/acs.langmuir.6b00462] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Pseudomorphic mineral replacement reactions involve one mineral phase replacing another, while preserving the original mineral's size and texture. Macroscopically, these transformations are driven by system-wide equilibration through dissolution and precipitation reactions. It is unclear, however, how replacement occurs on the molecular scale and what role dissolved ion transport plays. Here, we develop a new quantitative framework to explain the pseudomorphic replacement of KBr crystal in a saturated KCl solution through a combination of microscopic, spectroscopic, and modeling techniques. Our observations reveal that pseudomorphic mineral replacement (pMRR) is transport-controlled for this system and that convective fluid flows, caused by diffusioosmosis, play a key role in the ion transport process across the reaction-induced pores in the product phase. Our findings have important implications for understanding mineral transformations in natural environments and suggest that replacement could be exploited in commercial and laboratory applications.
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Affiliation(s)
- Abhishek Kar
- Department of Chemical Engineering, The Pennsylvania State University , University Park, Pennsylvania 16802, United States
| | - Michael McEldrew
- Department of Chemical Engineering, The Pennsylvania State University , University Park, Pennsylvania 16802, United States
| | - Robert F Stout
- Department of Chemical Engineering, Carnegie Mellon University , Pittsburgh, Pennsylvania 15213, United States
| | - Benjamin E Mays
- Department of Chemical Engineering, The Pennsylvania State University , University Park, Pennsylvania 16802, United States
| | - Aditya Khair
- Department of Chemical Engineering, Carnegie Mellon University , Pittsburgh, Pennsylvania 15213, United States
| | - Darrell Velegol
- Department of Chemical Engineering, The Pennsylvania State University , University Park, Pennsylvania 16802, United States
| | - Christopher A Gorski
- Department of Civil & Environmental Engineering, The Pennsylvania State University , University Park, Pennsylvania 16802, United States
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Pignatelli I, Kumar A, Bauchy M, Sant G. Topological Control on Silicates' Dissolution Kinetics. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:4434-4439. [PMID: 27108867 DOI: 10.1021/acs.langmuir.6b00359] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Like many others, silicate solids dissolve when placed in contact with water. In a given aqueous environment, the dissolution rate depends on the composition and the structure of the solid and can span several orders of magnitude. Although the kinetics of dissolution depends on the complexities of both the dissolving solid and the solvent, a clear understanding of which structural descriptors of the solid control its dissolution rate is lacking. By pioneering dissolution experiments and atomistic simulations, we correlate the dissolution rates-ranging over 4 orders of magnitude-of a selection of silicate glasses and crystals to the number of chemical topological constraints acting between the atoms of the dissolving solid. The number of such constraints serves as an indicator of the effective activation energy, which arises from steric effects, and prevents the network from reorganizing locally to accommodate intermediate units forming over the course of the dissolution.
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Affiliation(s)
- Isabella Pignatelli
- Laboratory for the Chemistry of Construction Materials (LC2), Department of Civil and Environmental Engineering, ‡Physics of AmoRphous and Inorganic Solids Laboratory (PARISlab), Department of Civil and Environmental Engineering, and §California Nanosystems Institute (CNSI), University of California, Los Angeles , Los Angeles, California 90095, United States
| | - Aditya Kumar
- Laboratory for the Chemistry of Construction Materials (LC2), Department of Civil and Environmental Engineering, ‡Physics of AmoRphous and Inorganic Solids Laboratory (PARISlab), Department of Civil and Environmental Engineering, and §California Nanosystems Institute (CNSI), University of California, Los Angeles , Los Angeles, California 90095, United States
| | - Mathieu Bauchy
- Laboratory for the Chemistry of Construction Materials (LC2), Department of Civil and Environmental Engineering, ‡Physics of AmoRphous and Inorganic Solids Laboratory (PARISlab), Department of Civil and Environmental Engineering, and §California Nanosystems Institute (CNSI), University of California, Los Angeles , Los Angeles, California 90095, United States
| | - Gaurav Sant
- Laboratory for the Chemistry of Construction Materials (LC2), Department of Civil and Environmental Engineering, ‡Physics of AmoRphous and Inorganic Solids Laboratory (PARISlab), Department of Civil and Environmental Engineering, and §California Nanosystems Institute (CNSI), University of California, Los Angeles , Los Angeles, California 90095, United States
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Bouakkaz R, Abdelouas A, El Mendili Y, Grambow B, Gin S. SON68 glass alteration under Si-rich solutions at low temperature (35–90 °C): kinetics, secondary phases and isotopic exchange studies. RSC Adv 2016. [DOI: 10.1039/c6ra12404f] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Pristine and 29Si-doped SON68 glass were leached in dynamic mode in Si-rich COx water at 42 ppm, pH 8, (35–90 °C) and S/V (900–1800 m−1). Diffusion and surface reaction process governed the glass alteration. The residual rate at 90 °C to 653 days is about 10−3 g m−2 d−1.
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Affiliation(s)
- Rachid Bouakkaz
- SUBATECH – Ecole des Mines de Nantes-CNRS/IN2P3-Université de Nantes
- 44307 Nantes
- France
| | - Abdesselam Abdelouas
- SUBATECH – Ecole des Mines de Nantes-CNRS/IN2P3-Université de Nantes
- 44307 Nantes
- France
| | - Yassine El Mendili
- SUBATECH – Ecole des Mines de Nantes-CNRS/IN2P3-Université de Nantes
- 44307 Nantes
- France
| | - Bernd Grambow
- SUBATECH – Ecole des Mines de Nantes-CNRS/IN2P3-Université de Nantes
- 44307 Nantes
- France
| | - Stéphane Gin
- CEA Marcoule DTCD SECM LCLT
- 30207 Bagnols-Sur-Cèze
- France
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Functional materials from local and earth-abundant precursors: Scalable and cost-efficient synthetic approach. RESOURCE-EFFICIENT TECHNOLOGIES 2015. [DOI: 10.1016/j.reffit.2015.06.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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50
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Affiliation(s)
- Andrew Putnis
- The Institute for Geoscience Research, TIGeR, Curtin University, Perth 6102, Australia and at the Institut für Mineralogie, University of Münster, Münster 48149, Germany
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