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Pupilli F, Tavoni M, Marsan O, Drouet C, Tampieri A, Sprio S. Tuning Mg Doping and Features of Bone-like Apatite Nanoparticles Obtained via Hydrothermal Synthesis. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:16557-16570. [PMID: 39056438 DOI: 10.1021/acs.langmuir.4c02035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/28/2024]
Abstract
Nanocrystalline apatites have been intensively studied for decades, not only for their well-known mimesis of bone apatite but also for applicative purposes, whether as biomaterials for skeletal repair or more recently for a variety of nanomedical applications enabled by their peculiar surface characteristics. Particularly, ion-doped apatites are of great interest because the incorporation of foreign ions in the composition of apatite (nano)crystals alters the bulk and surface properties, modifying their ability to interact with the external environment. This is clearly seen in the physiology of bone tissue, whose mineral phase, a low crystallinity apatitic phase, can dynamically exchange ions with cells, thus driving bone metabolism. Taking bone mineral as a model, the present work describes the development of Mg-doped hydroxyapatite nanoparticles, exploiting hydrothermal synthesis to achieve extents of Mg2+ doping hardly achieved before and using citrate to develop stable apatite colloidal dispersions. Morphological and physicochemical analyses, associated with in-depth investigation of ions populating the apatitic lattice and the nonapatitic surface layer, concurred to demonstrate the cooperative presence of Mg2+ and citrate ions, affecting the dynamic ion retention/release mechanisms. Achieving high Mg2+ doping rates and understanding how Mg doping translates into surface activation of apatite-based nanoparticles is expected to foster the design of novel smart and tunable devices, to adsorb and release ionic species and cargo molecules, with potential innovations in the biomedical field or even beyond, as in catalysis or for environmental remediation.
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Affiliation(s)
- Federico Pupilli
- Institute of Science, Technology and Sustainability for Ceramic Materials-National Research Council of Italy (ISSMC-CNR), Via Granarolo 64, 48018 Faenza, Italy
- Department of Chemical Sciences, University of Padova, Via Francesco Marzolo 1, 35131 Padova, Italy
| | - Marta Tavoni
- Institute of Science, Technology and Sustainability for Ceramic Materials-National Research Council of Italy (ISSMC-CNR), Via Granarolo 64, 48018 Faenza, Italy
| | - Olivier Marsan
- CIRIMAT, CNRS, Université de Toulouse, Ensiacet, 4 Allee Emile Monso, Toulouse Cedex 4 31030, France
| | - Christophe Drouet
- Institute of Science, Technology and Sustainability for Ceramic Materials-National Research Council of Italy (ISSMC-CNR), Via Granarolo 64, 48018 Faenza, Italy
- CIRIMAT, CNRS, Université de Toulouse, Ensiacet, 4 Allee Emile Monso, Toulouse Cedex 4 31030, France
| | - Anna Tampieri
- Institute of Science, Technology and Sustainability for Ceramic Materials-National Research Council of Italy (ISSMC-CNR), Via Granarolo 64, 48018 Faenza, Italy
| | - Simone Sprio
- Institute of Science, Technology and Sustainability for Ceramic Materials-National Research Council of Italy (ISSMC-CNR), Via Granarolo 64, 48018 Faenza, Italy
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2
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Application and translation of nano calcium phosphates in biomedicine. Nanomedicine (Lond) 2023. [DOI: 10.1016/b978-0-12-818627-5.00004-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2023] Open
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3
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Kusada K, Kitagawa H. Continuous-flow syntheses of alloy nanoparticles. MATERIALS HORIZONS 2022; 9:547-558. [PMID: 34812460 DOI: 10.1039/d1mh01413g] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Alloy nanoparticles (NPs), including core-shell, segregated and solid-solution types, show a variety of attractive properties such as catalytic and optical properties and are used in a wide range of applications. Precise control and good reproducibility in the syntheses of alloy NPs are highly demanded because these properties are tunable by controlling alloy structures, compositions, particle sizes, and so on. To improve the efficiency and reproducibility of their syntheses, continuous-flow syntheses with various types of reactors have recently been developed instead of the current mainstream approach, batch syntheses. In this review, we focus on the continuous-flow syntheses of alloy NPs and first overview the flow syntheses of NPs, especially of alloy NPs. Subsequently, the details of flow reactors and their chemistry to synthesize core-shell, segregated, solid-solution types of alloy NPs, and high-entropy alloy NPs are introduced. Finally, the challenges and future perspectives in this field are discussed.
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Affiliation(s)
- Kohei Kusada
- The Hakubi Centre for Advanced Research, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan.
- PRESTO, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Hiroshi Kitagawa
- Division of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan.
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4
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Lipid-assisted synthesis of magnesium-loaded hydroxyapatite as a potential bone healing material. J Taiwan Inst Chem Eng 2021. [DOI: 10.1016/j.jtice.2021.09.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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5
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Ballouze R, Marahat MH, Mohamad S, Saidin NA, Kasim SR, Ooi JP. Biocompatible magnesium-doped biphasic calcium phosphate for bone regeneration. J Biomed Mater Res B Appl Biomater 2021; 109:1426-1435. [PMID: 33484103 DOI: 10.1002/jbm.b.34802] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 12/29/2020] [Accepted: 01/09/2021] [Indexed: 11/12/2022]
Abstract
Autologous bone grafting remains the gold standard for almost all bone void-filling orthopedic surgery. However, autologous bone grafting has several limitations, thus scientists are trying to identify an ideal synthetic material as an alternative bone graft substitute. Magnesium-doped biphasic calcium phosphate (Mg-BCP) has recently been in the spotlight and is considered to be a potential bone substitute. The Mg-BCP is a mixture of two bioceramics, that is, hydroxyapatite (HA) and β-tricalcium phosphate (β-TCP), doped with Mg2+ , and can be synthesized through chemical wet-precipitation, sol-gel, single diffusion gel, and solid state reactions. Regardless of the synthesis routes, it is found that the Mg2+ preferentially accommodates in β-TCP lattice instead of the HA lattice. The addition of Mg2+ to BCP leads to desirable physicochemical properties and is found to enhance the apatite-forming ability as compared to pristine BCP. In vitro results suggest that the Mg-BCP is bioactive and not toxic to cells. Implantation of Mg-BCP in in vivo models further affirmed its biocompatibility and efficacy as a bone substitute. However, like the other bioceramics, the optimum physicochemical properties of the Mg-BCP scaffold have yet to be determined. Further investigations are required regarding Mg-BCP applications in bone tissue engineering.
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Affiliation(s)
- Rama Ballouze
- Integrative Medicine Cluster, Advanced Medical and Dental Institute, Universiti Sains Malaysia, Kepala Batas, Malaysia
| | - Muhammad Hanif Marahat
- School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia, Nibong Tebal, Malaysia
| | - Sharlina Mohamad
- Integrative Medicine Cluster, Advanced Medical and Dental Institute, Universiti Sains Malaysia, Kepala Batas, Malaysia
| | - Nor Aini Saidin
- Integrative Medicine Cluster, Advanced Medical and Dental Institute, Universiti Sains Malaysia, Kepala Batas, Malaysia
| | - Shah Rizal Kasim
- School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia, Nibong Tebal, Malaysia
| | - Jer Ping Ooi
- Integrative Medicine Cluster, Advanced Medical and Dental Institute, Universiti Sains Malaysia, Kepala Batas, Malaysia
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6
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Krokhicheva PA, Gol’dberg MA, Khairutdinova DR, Antonova OS, Akhmedova SA, Kirsanova VA, Sviridova IK, Sergeeva NS, Leonov AV, Baikin AS, Smirnov IV, Barinov SM, Komlev VS. Bone Cements Based on Struvite: The Effect of Vancomycin Loading and Assessment of Biocompatibility and Osteoconductive Potentials In Vivo. RUSS J INORG CHEM+ 2021. [DOI: 10.1134/s0036023621080118] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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7
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Lübke M, Sumboja A, McCafferty L, Armer CF, Handoko AD, Du Y, McColl K, Cora F, Brett D, Liu Z, Darr JA. Transition-Metal-Doped α-MnO2
Nanorods as Bifunctional Catalysts for Efficient Oxygen Reduction and Evolution Reactions. ChemistrySelect 2018. [DOI: 10.1002/slct.201702514] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Mechthild Lübke
- Department of Chemistry; University College London; 20 Gordon Street London, WC1H 0AJ UK
- Institute of Materials Research and Engineering (IMRE), A*STAR; Agency for Science, Technology and Research); 2 Fusionopolis Way, Innovis #08-03 Singapore 138634
| | - Afriyanti Sumboja
- Institute of Materials Research and Engineering (IMRE), A*STAR; Agency for Science, Technology and Research); 2 Fusionopolis Way, Innovis #08-03 Singapore 138634
| | - Liam McCafferty
- Department of Chemistry; University College London; 20 Gordon Street London, WC1H 0AJ UK
| | - Ceilidh F. Armer
- Institute of Materials Research and Engineering (IMRE), A*STAR; Agency for Science, Technology and Research); 2 Fusionopolis Way, Innovis #08-03 Singapore 138634
- College of Engineering and Computer Science; Australian National University, Canberra; ACT 0200 Australia
| | - Albertus D. Handoko
- Institute of Materials Research and Engineering (IMRE), A*STAR; Agency for Science, Technology and Research); 2 Fusionopolis Way, Innovis #08-03 Singapore 138634
| | - Yonghua Du
- Institute of Chemical & Engineering Sciences, A*STAR; Agency for Science, Technology and Research); 1 Pesek Road, Jurong Island Singapore 627833
| | - Kit McColl
- Department of Chemistry; University College London; 20 Gordon Street London, WC1H 0AJ UK
| | - Furio Cora
- Department of Chemistry; University College London; 20 Gordon Street London, WC1H 0AJ UK
| | - Dan Brett
- Electrochemical Innovation Lab; Department of Chemical Engineering; University College London, Torrington Place; WC1E 7JE UK
| | - Zhaolin Liu
- Institute of Materials Research and Engineering (IMRE), A*STAR; Agency for Science, Technology and Research); 2 Fusionopolis Way, Innovis #08-03 Singapore 138634
| | - Jawwad A. Darr
- Department of Chemistry; University College London; 20 Gordon Street London, WC1H 0AJ UK
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8
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Park SY, Madhurakkat Perikamana SK, Park JH, Kim SW, Shin H, Park SP, Jung HS. Osteoinductive superparamagnetic Fe nanocrystal/calcium phosphate heterostructured microspheres. NANOSCALE 2017; 9:19145-19153. [PMID: 29185575 DOI: 10.1039/c7nr06777a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Functional magnetic and biocompatible particles are of great interest because of their potential use in various bioapplications such as hyperthermia for cancer treatment, magnetic resonance imaging (MRI) contrast agents and drug delivery. Herein, we introduce a facile method for synthesizing magnetic Fe nanocrystal/Fe-substituted calcium phosphate (Fe/FeCaP) heterostructured microspheres using a two-step procedure: (1) one-pot hydrothermal synthesis to prepare uniform-sized FeCaP microspheres and (2) post-reduction annealing at 600 °C for Fe extraction from FeCaP. This approach results in the fabrication of Fe/FeCaP heterostructured microspheres that exhibit superparamagnetism with a saturation magnetization of 10.77 emu g-1. The Fe/FeCaP particles annealed at 600 °C show a much higher magnetic moment compared with the non-annealed FeCaP particles. Moreover, T2-weighted MRI phantom images reveal that the Fe/FeCaP heterostructured microspheres possess higher relaxivity than paramagnetic FeCaP, demonstrating their potential as superior and biocompatible MRI contrast agents. Moreover, the enhancement in osteoconductivity for Fe/FeCaP microspheres without any evidence of cytotoxicity was verified. Our results demonstrate the great potential of multi-functional Fe/FeCaP microspheres for use as biocompatible bone regeneration agents as well as MRI contrast agents.
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Affiliation(s)
- So Yeon Park
- School of Advanced Materials Science & Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea.
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9
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Tian T, Liao J, Zhou T, Lin S, Zhang T, Shi SR, Cai X, Lin Y. Fabrication of Calcium Phosphate Microflowers and Their Extended Application in Bone Regeneration. ACS APPLIED MATERIALS & INTERFACES 2017; 9:30437-30447. [PMID: 28831802 DOI: 10.1021/acsami.7b09176] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Taoran Tian
- State Key Laboratory of Oral Diseases,
West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan Province 610041, P. R. China
| | - Jinfeng Liao
- State Key Laboratory of Oral Diseases,
West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan Province 610041, P. R. China
| | - Tengfei Zhou
- State Key Laboratory of Oral Diseases,
West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan Province 610041, P. R. China
| | - Shiyu Lin
- State Key Laboratory of Oral Diseases,
West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan Province 610041, P. R. China
| | - Tao Zhang
- State Key Laboratory of Oral Diseases,
West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan Province 610041, P. R. China
| | - Si-Rong Shi
- State Key Laboratory of Oral Diseases,
West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan Province 610041, P. R. China
| | - Xiaoxiao Cai
- State Key Laboratory of Oral Diseases,
West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan Province 610041, P. R. China
| | - Yunfeng Lin
- State Key Laboratory of Oral Diseases,
West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan Province 610041, P. R. China
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10
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Quantifying the efficiency of Hydroxyapatite Mineralising Peptides. Sci Rep 2017; 7:7681. [PMID: 28794471 PMCID: PMC5550443 DOI: 10.1038/s41598-017-07247-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Accepted: 06/19/2017] [Indexed: 12/02/2022] Open
Abstract
We present a non-destructive analytical calibration tool to allow quantitative assessment of individual calcium phosphates such as hydroxyapatite (HAP) from mixtures including brushite. Many experimental approaches are used to evaluate the mineralising capabilities of biomolecules including peptides. However, it is difficult to quantitatively compare the efficacy of peptides in the promotion of mineralisation when inseparable mixtures of different minerals are produced. To address this challenge, a series of hydroxyapatite and brushite mixtures were produced as a percent/weight (0–100%) from pure components and multiple (N = 10) XRD patterns were collected for each mixture. A linear relationship between the ratio of selected peak heights and the molar ratio was found. Using this method, the mineralising capabilities of three known hydroxyapatite binding peptides, CaP(S) STLPIPHEFSRE, CaP(V) VTKHLNQISQSY and CaP(H) SVSVGMKPSPRP, was compared. All three directed mineralisation towards hydroxyapatite in a peptide concentration dependent manner. CaP(V) was most effective at inducing hydroxyapatite formation at higher reagent levels (Ca2+ = 200 mM), as also seen with peptide-silk chimeric materials, whereas CaP(S) was most effective when lower concentrations of calcium (20 mM) and phosphate were used. The approach can be extended to investigate HAP mineralisation in the presence of any number of mineralisation promoters or inhibitors.
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11
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Darr JA, Zhang J, Makwana NM, Weng X. Continuous Hydrothermal Synthesis of Inorganic Nanoparticles: Applications and Future Directions. Chem Rev 2017; 117:11125-11238. [PMID: 28771006 DOI: 10.1021/acs.chemrev.6b00417] [Citation(s) in RCA: 291] [Impact Index Per Article: 41.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Nanomaterials are at the leading edge of the emerging field of nanotechnology. Their unique and tunable size-dependent properties (in the range 1-100 nm) make these materials indispensable in many modern technological applications. In this Review, we summarize the state-of-art in the manufacture and applications of inorganic nanoparticles made using continuous hydrothermal flow synthesis (CHFS) processes. First, we introduce ideal requirements of any flow process for nanoceramics production, outline different approaches to CHFS, and introduce the pertinent properties of supercritical water and issues around mixing in flow, to generate nanoparticles. This Review then gives comprehensive coverage of the current application space for CHFS-made nanomaterials including optical, healthcare, electronics (including sensors, information, and communication technologies), catalysis, devices (including energy harvesting/conversion/fuels), and energy storage applications. Thereafter, topics of precursor chemistry and products, as well as materials or structures, are discussed (surface-functionalized hybrids, nanocomposites, nanograined coatings and monoliths, and metal-organic frameworks). Later, this Review focuses on some of the key apparatus innovations in the field, such as in situ flow/rapid heating systems (to investigate kinetics and mechanisms), approaches to high throughput flow syntheses (for nanomaterials discovery), as well as recent developments in scale-up of hydrothermal flow processes. Finally, this Review covers environmental considerations, future directions and capabilities, along with the conclusions and outlook.
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Affiliation(s)
- Jawwad A Darr
- Department of Chemistry, University College London, Christopher Ingold Laboratories , 20 Gordon Street, London WC1H 0AJ, United Kingdom
| | - Jingyi Zhang
- Department of Environmental & Resource Sciences, Zhejiang University , 866 Yuhangtang Road, Hangzhou, Zhejiang 310058, People's Republic of China
| | - Neel M Makwana
- Department of Chemistry, University College London, Christopher Ingold Laboratories , 20 Gordon Street, London WC1H 0AJ, United Kingdom
| | - Xiaole Weng
- Department of Environmental & Resource Sciences, Zhejiang University , 866 Yuhangtang Road, Hangzhou, Zhejiang 310058, People's Republic of China
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12
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Qin T, Han Y, Zhang P, Hassan Wani I, Nikolajeff F, Leifer K, Engqvist H. Template-free synthesis of phosphate-based spheres via modified supersaturated phosphate buffer solutions. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2017; 28:99. [PMID: 28534282 DOI: 10.1007/s10856-017-5911-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Accepted: 05/05/2017] [Indexed: 06/07/2023]
Abstract
Modified supersaturated phosphate buffer solutions were used to synthesize phosphate-based spheres, including calcium phosphate (CaP), strontium phosphate (SrP) and barium phosphate (BaP). A series of ions concentrations in the modified phosphate buffer solutions were investigated in order to study their effects in precipitates morphologies. During synthesis, it was found that magnesium was the key factor in sphere formation. The morphologies of calcium phosphate, strontium phosphate and barium phosphate precipitates varied as the concentration of magnesium ions varied. When sufficient magnesium was provided, the precipitates appeared spherical, and the diameter was in range of 0.5-2 μm. The morphologies, compositions and structure of spheres were characterized by x-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and N2 adsorption analysis. Moreover, the application of magnesium substituted calcium phosphate spheres in dentin tubules occlusion was investigated.
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Affiliation(s)
- Tao Qin
- The Division for Applied Material Science, Department of Engineering Science, Uppsala University, Ångströmlaboratoriet, Lägerhyddsvägen 1,752 37, Uppsala, Sweden.
| | - Yuanyuan Han
- The Division for Applied Material Science, Department of Engineering Science, Uppsala University, Ångströmlaboratoriet, Lägerhyddsvägen 1,752 37, Uppsala, Sweden
| | - Peng Zhang
- The Division for Nanotechnology and Functional Materials, Department of Engineering Science, Uppsala University, Ångströmlaboratoriet, Lägerhyddsvägen 1,752 37, Uppsala, Sweden
| | - Ishtiaq Hassan Wani
- The Division for Applied Material Science, Department of Engineering Science, Uppsala University, Ångströmlaboratoriet, Lägerhyddsvägen 1,752 37, Uppsala, Sweden
| | - Fredrik Nikolajeff
- The Division for Applied Material Science, Department of Engineering Science, Uppsala University, Ångströmlaboratoriet, Lägerhyddsvägen 1,752 37, Uppsala, Sweden
| | - Klaus Leifer
- The Division for Applied Material Science, Department of Engineering Science, Uppsala University, Ångströmlaboratoriet, Lägerhyddsvägen 1,752 37, Uppsala, Sweden
| | - Håkan Engqvist
- The Division for Applied Material Science, Department of Engineering Science, Uppsala University, Ångströmlaboratoriet, Lägerhyddsvägen 1,752 37, Uppsala, Sweden
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13
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Piccirillo C, Denis C, Pullar R, Binions R, Parkin I, Darr J, Castro P. Aerosol assisted chemical vapour deposition of hydroxyapatite-embedded titanium dioxide composite thin films. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2016.08.010] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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14
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Dunne PW, Munn AS, Starkey CL, Huddle TA, Lester EH. Continuous-flow hydrothermal synthesis for the production of inorganic nanomaterials. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2015; 373:rsta.2015.0015. [PMID: 26574533 DOI: 10.1098/rsta.2015.0015] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 06/29/2015] [Indexed: 06/05/2023]
Abstract
As nanotechnology becomes increasingly important and ubiquitous, new and scalable synthetic approaches are needed to meet the growing demand for industrially viable routes to nanomaterial production. Continuous-flow hydrothermal synthesis or supercritical water hydrothermal synthesis (scWHS) is emerging as a versatile solution to this problem. The process was initially developed to take advantage of the tunable chemical and physical properties of superheated water to produce metal oxide nanoparticles by rapid nucleation and precipitation. The development of new mixing regimes and reactor designs has been facilitated by the modelling of reactor systems. These new reactor designs further exploit the properties of supercritical water to promote faster and more uniform mixing of reagent streams. The synthetic approach has been expanded beyond the metal oxide systems for which it was conceived, and now encompasses metal sulfides, metal phosphates, metal nanoparticles and metal-organic frameworks. In many of these cases, some degree of size and shape control can be achieved through careful consideration of both chemistry and reactor design. This review briefly considers the development of scWHS reactor technology, before highlighting some of our recent work in expanding the scope of this synthetic method to include a wide range of materials.
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Affiliation(s)
- Peter W Dunne
- Department of Chemical and Environmental Engineering, University of Nottingham, University Park, Nottingham NG7 2RD, UK
| | - Alexis S Munn
- Department of Chemical and Environmental Engineering, University of Nottingham, University Park, Nottingham NG7 2RD, UK
| | - Chris L Starkey
- Department of Chemical and Environmental Engineering, University of Nottingham, University Park, Nottingham NG7 2RD, UK
| | - Tom A Huddle
- Department of Chemical and Environmental Engineering, University of Nottingham, University Park, Nottingham NG7 2RD, UK
| | - Ed H Lester
- Department of Chemical and Environmental Engineering, University of Nottingham, University Park, Nottingham NG7 2RD, UK
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15
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Microwave assisted synthesis and characterization of magnesium substituted calcium phosphate bioceramics. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 56:286-93. [DOI: 10.1016/j.msec.2015.05.025] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2014] [Revised: 03/23/2015] [Accepted: 05/07/2015] [Indexed: 11/13/2022]
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16
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Kumar PN, Mishra SK, Kannan S. Probing the limit of magnesium uptake by β-tricalcium phosphate in biphasic mixtures formed from calcium deficient apatites. J SOLID STATE CHEM 2015. [DOI: 10.1016/j.jssc.2015.07.051] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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17
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Vitrification of β-tricalcium phosphate in sodium aluminoborophosphate glass and the effect of Ga3+ substitution. J SOLID STATE CHEM 2015. [DOI: 10.1016/j.jssc.2015.08.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Chen J, Yu Z, Zhu P, Wang J, Gan Z, Wei J, Zhao Y, Wei S. Effects of fluorine on the structure of fluorohydroxyapatite: a study by XRD, solid-state NMR and Raman spectroscopy. J Mater Chem B 2015; 3:34-38. [DOI: 10.1039/c4tb01561d] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
An atomic snapshot of fluorohydroxyapatites with different fluorine contents by solid state NMR.
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Affiliation(s)
- Jinshuai Chen
- School of Chemistry and Chemical Engineering
- Yangzhou University
- P.R. China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses
- Yangzhou
| | - Zhiwu Yu
- High Magnetic Field Laboratory
- Hefei Institutes of Physical Science
- Chinese Academy of Sciences
- Hefei 230031
- P.R. China
| | - Peizhi Zhu
- School of Chemistry and Chemical Engineering
- Yangzhou University
- P.R. China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses
- Yangzhou
| | - Junfeng Wang
- High Magnetic Field Laboratory
- Hefei Institutes of Physical Science
- Chinese Academy of Sciences
- Hefei 230031
- P.R. China
| | - Zhehong Gan
- Center of Interdisciplinary Magnetic Resonance
- National High Magnetic Field Laboratory
- Tallahassee
- USA
| | - Jie Wei
- Key Laboratory for Ultrafine Materials of Ministry of Education
- East China University of Science and Technology
- Shanghai
- P.R. China
| | - Yinghui Zhao
- Department of Oral and Maxillofacial Surgery
- Laboratory of Interdisciplinary Studies
- School and Hospital of Stomatology
- Peking University
- Beijing 100081
| | - Shicheng Wei
- Department of Oral and Maxillofacial Surgery
- Laboratory of Interdisciplinary Studies
- School and Hospital of Stomatology
- Peking University
- Beijing 100081
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Wang X, Shi J, Li Z, Zhang S, Wu H, Jiang Z, Yang C, Tian C. Facile one-pot preparation of chitosan/calcium pyrophosphate hybrid microflowers. ACS APPLIED MATERIALS & INTERFACES 2014; 6:14522-32. [PMID: 25065382 DOI: 10.1021/am503787h] [Citation(s) in RCA: 83] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Flower-like chitosan/calcium pyrophosphate hybrid microparticles (microflowers) are prepared using a facile one-pot approach by combining ionotropic gelation with biomimetic mineralization. Chitosan-tripolyphosphate (CS-TPP) nanocomplexes are first synthesized through ionotropic gelation; meanwhile, excess TPP is partly hydrolyzed into pyrophosphate ions (P2O7(4-)). Upon addition of CaCl2, CS-TPP nanocomplexes serve as a versatile template, inducing in situ mineralization of Ca2P2O7 and directing its growth and assembly into microflowers. The whole preparation process can be completed within half an hour. The as-prepared microflowers are composed of 23.0% CS-TPP nanocomplexes and 77.0% Ca2P2O7 crystals. Mesopores (3.7 and 11.2 nm) and macropores coexist in the microflowers, indicating porous and hierarchical structures. The microflowers exhibit high efficiency in dye adsorption and enzymatic catalysis. Specifically, a high adsorption capacity of 520 mg g(-1) for Congo red is achieved. And the immobilized enzyme retains about 85% catalytic activity compared with that of the free enzyme. The facile one-pot preparation process ensures the broad applications of the porous hybrid microflowers.
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Affiliation(s)
- Xiaoli Wang
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University , Tianjin 300072, People's Republic of China
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20
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Diallo-Garcia S, Ben Osman M, Krafft JM, Boujday S, Guylène C. Discrimination of infrared fingerprints of bulk and surface POH and OH of hydroxyapatites. Catal Today 2014. [DOI: 10.1016/j.cattod.2013.11.041] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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21
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Cation substitution in β-tricalcium phosphate investigated using multi-nuclear, solid-state NMR. J SOLID STATE CHEM 2014. [DOI: 10.1016/j.jssc.2013.10.026] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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22
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Singh SS, Roy A, Lee BE, Banerjee I, Kumta PN. MC3T3-E1 proliferation and differentiation on biphasic mixtures of Mg substituted β-tricalcium phosphate and amorphous calcium phosphate. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 45:589-98. [PMID: 25491868 DOI: 10.1016/j.msec.2014.03.032] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2014] [Accepted: 03/17/2014] [Indexed: 11/19/2022]
Abstract
A low temperature aqueous approach was used to synthesize nanocrystalline, high surface area Mg(2+) substituted β-tricalcium phosphate (β-TCMP) to assess its potential use as a synthetic bone graft substitute. X-ray diffraction indicated that β-TCMP was the predominant crystalline phase formed. However, thermal analysis revealed the presence of a secondary amorphous phase which increased with increasing Mg(2+) concentration. Further analysis by Rietveld refinement indicated that the level of ionic substitution of Ca(2+) by Mg(2+) was significantly lower than the amount of Mg(2+) measured using elemental analysis, confirming the formation of a Mg(2+) rich secondary amorphous phase. MC3T3-E1 proliferation on substrates prepared using β-TCMP was assessed using the MTT assay. In comparison to commercially available β-TCP, increased proliferation was observed on samples prepared with 50% Mg, despite elevated Mg(2+) and PO4(3-) concentrations in culture media. Alkaline phosphatase (ALP) activity and qRT-PCR were used to study the effect of varying Mg(2+) substitution on osteogenic differentiation. Cells cultured on β-TCMP substrates prepared with increased Mg(2+) concentrations expressed significantly increased levels of ALP activity and osteogenic genes such as, osteocalcin, collagen-1, and Runx2, in comparison to those cultured on commercially available β-TCP.
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Affiliation(s)
- Satish S Singh
- Department of Chemical & Petroleum Engineering, University of Pittsburgh, Pittsburgh, PA, 15261, USA
| | - Abhijit Roy
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, 15261, USA
| | - Boeun E Lee
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, 15261, USA
| | - Ipsita Banerjee
- Department of Chemical & Petroleum Engineering, University of Pittsburgh, Pittsburgh, PA, 15261, USA; Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, 15261, USA
| | - Prashant N Kumta
- Department of Chemical & Petroleum Engineering, University of Pittsburgh, Pittsburgh, PA, 15261, USA; Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, 15261, USA; Center for Craniofacial Regeneration, University of Pittsburgh, Pittsburgh, PA, 15261, USA; Department of Mechanical Engineering and Materials Science, University of Pittsburgh, PA, 15261, USA; Center for Complex Engineered Multifunctional Materials, University of Pittsburgh, PA, 15261, USA.
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23
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Quesada-Cabrera R, Weng X, Hyett G, Clark RJH, Wang XZ, Darr JA. High-throughput continuous hydrothermal synthesis of nanomaterials (part II): unveiling the as-prepared CexZryYzO2-δ phase diagram. ACS COMBINATORIAL SCIENCE 2013; 15:458-63. [PMID: 23902344 DOI: 10.1021/co3001346] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
High-throughput continuous hydrothermal flow synthesis was used to manufacture 66 unique nanostructured oxide samples in the Ce-Zr-Y-O system. This synthesis approach resulted in a significant increase in throughput compared to that of conventional batch or continuous hydrothermal synthesis methods. The as-prepared library samples were placed into a wellplate for both automated high-throughput powder X-ray diffraction and Raman spectroscopy data collection, which allowed comprehensive structural characterization and phase mapping. The data suggested that a continuous cubic-like phase field connects all three Ce-Zr-O, Ce-Y-O, and Y-Zr-O binary systems together with a smooth and steady transition between the structures of neighboring compositions. The continuous hydrothermal process led to as-prepared crystallite sizes in the range of 2-7 nm (as determined by using the Scherrer equation).
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Affiliation(s)
- Raul Quesada-Cabrera
- Department
of Chemistry, University College London, Christopher Ingold Laboratories,
20 Gordon Street, London, WC1H 0AJ, United Kingdom
| | - Xiaole Weng
- Department of Environmental
Engineering, Zhejiang University, Zhejiang
Province, Hangzhou, 310027, P. R. China
| | - Geoff Hyett
- Department of Chemistry, University of Southampton, Highfield, Southampton,
SO17 1BJ, U.K
| | - Robin J. H. Clark
- Department
of Chemistry, University College London, Christopher Ingold Laboratories,
20 Gordon Street, London, WC1H 0AJ, United Kingdom
| | - Xue Z. Wang
- Institute
of Particle Science
and Engineering, School of Process, Environmental and Materials Engineering, University of Leeds, Leeds LS2 9JT, United Kingdom
| | - Jawwad A. Darr
- Department
of Chemistry, University College London, Christopher Ingold Laboratories,
20 Gordon Street, London, WC1H 0AJ, United Kingdom
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24
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Vogel C, Adam C, McNaughton D. Determination of phosphate phases in sewage sludge ash-based fertilizers by Raman microspectroscopy. APPLIED SPECTROSCOPY 2013; 67:1101-1105. [PMID: 24067643 DOI: 10.1366/12-06955] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The chemical form of phosphate phases in sewage sludge ash (SSA)-based fertilizers was determined by Raman microspectroscopy. Raman mapping with a lateral resolution of 5 × 5 μm(2) easily detected different compounds present in the fertilizers with the help of recorded reference spectra of pure substances. Quartz and aluminosilicates showed Raman bands in the range of 450-520 cm(-1). Phosphates with apatite structure and magnesium triphosphate were determined at around 960 and 980 cm(-1), respectively. Furthermore, calcium/magnesium pyrophosphates were detected in some samples.
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Affiliation(s)
- Christian Vogel
- Monash University, School of Chemistry, Wellington Road, 3800 VIC Clayton, Australia
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25
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Shi L, Naik AJT, Goodall JBM, Tighe C, Gruar R, Binions R, Parkin I, Darr J. Highly sensitive ZnO nanorod- and nanoprism-based NO2 gas sensors: size and shape control using a continuous hydrothermal pilot plant. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:10603-10609. [PMID: 23841720 DOI: 10.1021/la402339m] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Continuous hydrothermal flow synthesis of crystalline ZnO nanorods and prisms is reported via a new pilot-scale continuous hydrothermal reactor (at nominal production rates of up to 1.2 g/h). Different size and shape particles of ZnO (wurtsite structure) were obtained via altering reaction conditions such as the concentration of either additive H2O2 or metal salt. Selected ZnO samples (used as prepared) were evaluated as solid oxide gas sensors, showing excellent sensitivity toward NO2 gas. It was found that both the working temperature and gas concentration significantly affected the NO2 gas response at concentrations as low as 1 ppm.
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Affiliation(s)
- Liang Shi
- Department of Chemistry, University of Science and Technology of China, Hefei 230026, PR China.
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26
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Tighe CJ, Cabrera RQ, Gruar RI, Darr JA. Scale Up Production of Nanoparticles: Continuous Supercritical Water Synthesis of Ce–Zn Oxides. Ind Eng Chem Res 2013. [DOI: 10.1021/ie3025642] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Christopher J. Tighe
- Christopher-Ingold
Laboratories, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom
| | - Raul Quesada Cabrera
- Christopher-Ingold
Laboratories, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom
| | - Robert I. Gruar
- Christopher-Ingold
Laboratories, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom
| | - Jawwad A. Darr
- Christopher-Ingold
Laboratories, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom
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27
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Bohner M, Tadier S, van Garderen N, de Gasparo A, Döbelin N, Baroud G. Synthesis of spherical calcium phosphate particles for dental and orthopedic applications. BIOMATTER 2013; 3:e25103. [PMID: 23719177 PMCID: PMC3749799 DOI: 10.4161/biom.25103] [Citation(s) in RCA: 92] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/08/2013] [Revised: 04/17/2013] [Accepted: 05/21/2013] [Indexed: 11/19/2022]
Abstract
Calcium phosphate materials have been used increasingly in the past 40 years as bone graft substitutes in the dental and orthopedic fields. Accordingly, numerous fabrication methods have been proposed and used. However, the controlled production of spherical calcium phosphate particles remains a challenge. Since such particles are essential for the synthesis of pastes and cements delivered into the host bone by minimally-invasive approaches, the aim of the present document is to review their synthesis and applications. For that purpose, production methods were classified according to the used reagents (solutions, slurries, pastes, powders), dispersion media (gas, liquid, solid), dispersion tools (nozzle, propeller, sieve, mold), particle diameters of the end product (from 10 nm to 10 mm), and calcium phosphate phases. Low-temperature calcium phosphates such as monetite, brushite or octacalcium phosphate, as well as high-temperature calcium phosphates, such as hydroxyapatite, β-tricalcium phosphate or tetracalcium phosphate, were considered. More than a dozen production methods and over hundred scientific publications were discussed.
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Affiliation(s)
| | | | | | | | | | - Gamal Baroud
- Laboratoire de Biomécanique; Département de Génie; Université de Sherbrooke; Sherbrooke, QC Canada
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28
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Li X, Qiu Y, Wang S, Lu S, Gruar RI, Zhang X, Darr JA, He T. Electrophoretically deposited TiO2 compact layers using aqueous suspension for dye-sensitized solar cells. Phys Chem Chem Phys 2013; 15:14729-35. [DOI: 10.1039/c3cp51705e] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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Chaudhry AA, Knowles JC, Rehman I, Darr JA. Rapid hydrothermal flow synthesis and characterisation of carbonate- and silicate-substituted calcium phosphates. J Biomater Appl 2012; 28:448-61. [PMID: 22983020 PMCID: PMC4112750 DOI: 10.1177/0885328212460289] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A range of crystalline and nano-sized carbonate- and silicate-substituted hydroxyapatite has been successfully produced by using continuous hydrothermal flow synthesis technology. Ion-substituted calcium phosphates are better candidates for bone replacement applications (due to improved bioactivity) as compared to phase-pure hydroxyapatite. Urea was used as a carbonate source for synthesising phase pure carbonated hydroxyapatite (CO₃-HA) with ≈5 wt% substituted carbonate content (sample 7.5CO₃-HA) and it was found that a further increase in urea concentration in solution resulted in biphasic mixtures of carbonate-substituted hydroxyapatite and calcium carbonate. Transmission electron microscopy images revealed that the particle size of hydroxyapatite decreased with increasing urea concentration. Energy-dispersive X-ray spectroscopy result revealed a calcium deficient apatite with Ca:P molar ratio of 1.45 (±0.04) in sample 7.5CO₃-HA. For silicate-substituted hydroxyapatite (SiO₄-HA) silicon acetate was used as a silicate ion source. It was observed that a substitution threshold of ∼1.1 wt% exists for synthesis of SiO₄-HA in the continuous hydrothermal flow synthesis system, which could be due to the decreasing yields with progressive increase in silicon acetate concentration. All the as-precipitated powders (without any additional heat treatments) were analysed using techniques including Transmission electron microscopy, X-ray powder diffraction, Differential scanning calorimetry, Thermogravimetric analysis, Raman spectroscopy and Fourier transform infrared spectroscopy.
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Affiliation(s)
- Aqif A Chaudhry
- Clean Materials Technology Group, Department of Chemistry, University College London, Christopher Ingold Laboratories, London, UK.
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30
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Chaudhry AA, Yan H, Viola G, Reece MJ, Knowles JC, Gong K, Rehman I, Darr JA. Phase stability and rapid consolidation of hydroxyapatite–zirconia nano-coprecipitates made using continuous hydrothermal flow synthesis. J Biomater Appl 2012; 27:79-90. [DOI: 10.1177/0885328212444483] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
A rapid and continuous hydrothermal route for the synthesis of nano-sized hydroxyapatite rods co-precipitated with calcium-doped zirconia nanoparticles using a superheated water flow at 450°C and 24.1 MPa as a crystallizing medium is described. Hydroxyapatite and calcium-doped zirconia phases in the powder mixtures could be clearly identified based on particle size and morphology under transmission electron microscopy. Retention of a nanostructure after sintering is crucial to load-bearing applications of hydroxyapatite-based ceramics. Therefore, rapid consolidation of the co-precipitates was investigated using a spark plasma sintering furnace under a range of processing conditions. Samples nominally containing 5 and 10 wt% calcium-doped zirconia and hydroxyapatite made with Ca:P solution molar ratio 2.5 showed excellent thermal stability (investigated using in situ variable temperature X-ray diffraction) and were sintered via spark plasma sintering to >96% sintered densities at 1000°C resulting in hydroxyapatite and calcium-doped zirconia as the only two phases. Mechanical tests of spark plasma sintering sintered samples (containing 10 wt% calcium-doped zirconia) revealed a three-pt flexural strength of 107.7 MPa and Weibull modulus of 9.9. The complementary nature of the spark plasma sintering technique and continuous hydrothermal flow synthesis (which results in retention of a nanostructure even after sintering at elevated temperatures) was hence showcased.
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Affiliation(s)
- Aqif A Chaudhry
- Christopher Ingold Laboratories, Department of Chemistry, University College London, London, UK
- Interdisciplinary Research Centre in Biomedical Materials, COMSATS Institute of Information Technology, Lahore, Pakistan
| | - Haixue Yan
- Centre for Materials Research and Nanoforce Technology Ltd., Queen Mary University of London, London, UK
| | - Giuseppe Viola
- Centre for Materials Research and Nanoforce Technology Ltd., Queen Mary University of London, London, UK
| | - Mike J Reece
- Centre for Materials Research and Nanoforce Technology Ltd., Queen Mary University of London, London, UK
| | - Jonathan C Knowles
- Division of Biomaterials and Tissue Engineering, UCL Eastman Dental Institute, London, UK
- WCU Research Centre of Nanobiomedical Science, Dankook University, Chungnam, South Korea
| | - Kenan Gong
- Christopher Ingold Laboratories, Department of Chemistry, University College London, London, UK
| | - Ihtesham Rehman
- The Kroto Research Institute, Department of Materials, University of Sheffield, Sheffield, UK
| | - Jawwad A Darr
- Christopher Ingold Laboratories, Department of Chemistry, University College London, London, UK
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31
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Tighe CJ, Gruar RI, Ma CY, Mahmud T, Wang XZ, Darr JA. Investigation of counter-current mixing in a continuous hydrothermal flow reactor. J Supercrit Fluids 2012. [DOI: 10.1016/j.supflu.2011.11.027] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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32
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Elouali S, Bloor LG, Binions R, Parkin IP, Carmalt CJ, Darr JA. Gas sensing with nano-indium oxides (In2O3) prepared via continuous hydrothermal flow synthesis. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:1879-1885. [PMID: 22185648 DOI: 10.1021/la203565h] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A rapid, clean, and continuous hydrothermal route to the synthesis of ca. 14 nm indium oxide (In(2)O(3)) nanoparticles using a superheated water flow at 400 °C and 24.1 MPa as a crystallizing medium and reagent is described. Powder X-ray diffraction (XRD) of the particles revealed that they were highly crystalline despite their very short time under hydrothermal flow conditions. Gas sensing substrates were prepared from an In(2)O(3) suspension via drop-coating, and their gas sensing properties were tested for response to butane, ethanol, CO, ammonia, and NO(2) gases. The sensors showed excellent selectivity toward ethanol, giving a response of 18-20 ppm.
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Affiliation(s)
- Sofia Elouali
- Department of Chemistry, Christopher Ingold Laboratories, University College London, 20 Gordon Street, London, WC1H 0AJ, United Kingdom
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33
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Gruar RI, Tighe CJ, Muir J, Kittler JT, Wodjak M, Kenyon AJ, Darr JA. Continuous hydrothermal synthesis of surface-functionalised nanophosphors for biological imaging. RSC Adv 2012. [DOI: 10.1039/c2ra21798h] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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34
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Chen M, Ma CY, Mahmud T, Darr JA, Wang XZ. Modelling and simulation of continuous hydrothermal flow synthesis process for nano-materials manufacture. J Supercrit Fluids 2011. [DOI: 10.1016/j.supflu.2011.07.002] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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35
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Data flow modeling, data mining and QSAR in high-throughput discovery of functional nanomaterials. Comput Chem Eng 2011. [DOI: 10.1016/j.compchemeng.2010.04.018] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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36
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Kellici S, Gong K, Lin T, Brown S, Clark RJH, Vickers M, Cockcroft JK, Middelkoop V, Barnes P, Perkins JM, Tighe CJ, Darr JA. High-throughput continuous hydrothermal flow synthesis of Zn-Ce oxides: unprecedented solubility of Zn in the nanoparticle fluorite lattice. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2010; 368:4331-4349. [PMID: 20732890 DOI: 10.1098/rsta.2010.0135] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
High-throughput continuous hydrothermal flow synthesis has been used as a rapid and efficient synthetic route to produce a range of crystalline nanopowders in the Ce-Zn oxide binary system. High-resolution powder X-ray diffraction data were obtained for both as-prepared and heat-treated (850 degrees C for 10 h in air) samples using the new robotic beamline I11, located at Diamond Light Source. The influence of the sample composition on the crystal structure and on the optical and physical properties was studied. All the nanomaterials were characterized using Raman spectroscopy, UV-visible spectrophotometry, Brunauer-Emmett-Teller surface area and elemental analysis (via energy-dispersive X-ray spectroscopy). Initially, for 'as-prepared' Ce(1-x)Zn(x)O(y), a phase-pure cerium oxide (fluorite) structure was obtained for nominal values of x=0.1 and 0.2. Biphasic mixtures were obtained for nominal values of x in the range of 0.3-0.9 (inclusive). High-resolution transmission electron microscopy images revealed that the phase-pure nano-CeO(2) (x=0) consisted of ca 3.7 nm well-defined nanoparticles. The nanomaterials produced herein generally had high surface areas (greater than 150 m(2) g(-1)) and possessed combinations of particle properties (e.g. bandgap, crystallinity, size, etc.) that were unobtainable or difficult to achieve by other more conventional synthetic methods.
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Affiliation(s)
- Suela Kellici
- Christopher Ingold Laboratories, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, UK
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37
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Hayashi H, Hakuta Y. Hydrothermal Synthesis of Metal Oxide Nanoparticles in Supercritical Water. MATERIALS 2010; 3:3794-3817. [PMID: 28883312 PMCID: PMC5445800 DOI: 10.3390/ma3073794] [Citation(s) in RCA: 140] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/02/2010] [Revised: 06/17/2010] [Accepted: 06/21/2010] [Indexed: 11/16/2022]
Abstract
This paper summarizes specific features of supercritical hydrothermal synthesis of metal oxide particles. Supercritical water allows control of the crystal phase, morphology, and particle size since the solvent's properties, such as density of water, can be varied with temperature and pressure, both of which can affect the supersaturation and nucleation. In this review, we describe the advantages of fine particle formation using supercritical water and describe which future tasks need to be solved.
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Affiliation(s)
- Hiromichi Hayashi
- Research Center for Compact Chemical System, National Institute of Advanced Industrial Science and Technology, Nigatake-4-2-1, Miyagino-ku, Sendai, 983-8551, Japan.
| | - Yukiya Hakuta
- Nanosystem Research Institute, National Institute of Advanced Industrial Science and Technology, Azuma-1-1-1, Tsukuba, Ibaragi, 305-8565, Japan.
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38
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Lin T, Kellici S, Gong K, Thompson K, Evans JRG, Wang X, Darr JA. Rapid Automated Materials Synthesis Instrument: Exploring the Composition and Heat-Treatment of Nanoprecursors Toward Low Temperature Red Phosphors. ACTA ACUST UNITED AC 2010; 12:383-92. [DOI: 10.1021/cc9001108] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tian Lin
- Christopher Ingold Laboratories, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom, and Institute of Particle Science & Engineering, School of Process, Environmental and Materials Engineering, University of Leeds, Clarendon Road, Leeds LS2 9JT, United Kingdom
| | - Suela Kellici
- Christopher Ingold Laboratories, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom, and Institute of Particle Science & Engineering, School of Process, Environmental and Materials Engineering, University of Leeds, Clarendon Road, Leeds LS2 9JT, United Kingdom
| | - Kenan Gong
- Christopher Ingold Laboratories, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom, and Institute of Particle Science & Engineering, School of Process, Environmental and Materials Engineering, University of Leeds, Clarendon Road, Leeds LS2 9JT, United Kingdom
| | - Kathryn Thompson
- Christopher Ingold Laboratories, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom, and Institute of Particle Science & Engineering, School of Process, Environmental and Materials Engineering, University of Leeds, Clarendon Road, Leeds LS2 9JT, United Kingdom
| | - Julian R. G. Evans
- Christopher Ingold Laboratories, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom, and Institute of Particle Science & Engineering, School of Process, Environmental and Materials Engineering, University of Leeds, Clarendon Road, Leeds LS2 9JT, United Kingdom
| | - Xue Wang
- Christopher Ingold Laboratories, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom, and Institute of Particle Science & Engineering, School of Process, Environmental and Materials Engineering, University of Leeds, Clarendon Road, Leeds LS2 9JT, United Kingdom
| | - Jawwad A. Darr
- Christopher Ingold Laboratories, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom, and Institute of Particle Science & Engineering, School of Process, Environmental and Materials Engineering, University of Leeds, Clarendon Road, Leeds LS2 9JT, United Kingdom
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39
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Zhang Z, Goodall JBM, Brown S, Karlsson L, Clark RJH, Hutchison JL, Rehman IU, Darr JA. Continuous hydrothermal synthesis of extensive 2D sodium titanate (Na2Ti3O7) nano-sheets. Dalton Trans 2010; 39:711-4. [DOI: 10.1039/b915699b] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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