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Liu T, Miao L, Yao F, Zhang W, Zhao W, Yang D, Feng Q, Hu D. Structure, Properties, Preparation, and Application of Layered Titanates. Inorg Chem 2024; 63:1-26. [PMID: 38109856 DOI: 10.1021/acs.inorgchem.3c03075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2023]
Abstract
As a typical cation-exchangeable layered compound, layered titanate has a unique open layered structure. Its excellent physical and chemical properties allow its wide use in the energy, environmental protection, electronics, biology, and other fields. This paper reviews the recent progress in the research on the structure, synthesis, properties, and application of layered titanates. Various reactivities, as well as the advantages and disadvantages, of different synthetic methods are discussed. The reaction mechanism and influencing factors of the ion exchange reaction, intercalation reaction, and exfoliation reaction are analyzed. The latest research progress on layered titanates and their modified products in the fields of photocatalysis, adsorption, electrochemistry, and other applications is summarized. Finally, the future development of layered titanate and its exfoliated product two-dimensional nanosheets is proposed.
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Affiliation(s)
- Tian Liu
- Faculty of Chemistry and Chemical Engineering, Engineering Research Center of Advanced Ferroelectric Functional Materials, Key Laboratory of Functional Materials of Baoji, Baoji University of Arts and Sciences, 1 Hi-Tech Avenue, Baoji, Shaanxi 721013, China
| | - Lei Miao
- Lab of Environmental Inorganic Materials Chemistry, Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-Ku, Sendai 980-8577, Japan
| | - Fangyi Yao
- Department of Advanced Materials Science, Faculty of Engineering and Design, Kagawa University, 2217-20 Hayashi-cho, Takamatsu 761-0396, Japan
| | - Wenxiong Zhang
- Institute for Solid State Physics (ISSP), The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 227-8581, Japan
| | - Weixing Zhao
- Faculty of Chemistry and Chemical Engineering, Engineering Research Center of Advanced Ferroelectric Functional Materials, Key Laboratory of Functional Materials of Baoji, Baoji University of Arts and Sciences, 1 Hi-Tech Avenue, Baoji, Shaanxi 721013, China
| | - Desuo Yang
- Faculty of Chemistry and Chemical Engineering, Engineering Research Center of Advanced Ferroelectric Functional Materials, Key Laboratory of Functional Materials of Baoji, Baoji University of Arts and Sciences, 1 Hi-Tech Avenue, Baoji, Shaanxi 721013, China
| | - Qi Feng
- Department of Advanced Materials Science, Faculty of Engineering and Design, Kagawa University, 2217-20 Hayashi-cho, Takamatsu 761-0396, Japan
| | - Dengwei Hu
- Faculty of Chemistry and Chemical Engineering, Engineering Research Center of Advanced Ferroelectric Functional Materials, Key Laboratory of Functional Materials of Baoji, Baoji University of Arts and Sciences, 1 Hi-Tech Avenue, Baoji, Shaanxi 721013, China
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Huang S, Mochalin VN. Combination of High pH and an Antioxidant Improves Chemical Stability of Two-Dimensional Transition-Metal Carbides and Carbonitrides (MXenes) in Aqueous Colloidal Solutions. Inorg Chem 2022; 61:9877-9887. [PMID: 35714052 DOI: 10.1021/acs.inorgchem.2c00537] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
MXenes, a large family of two-dimensional (2D) transition-metal carbides/nitrides, have attracted increased attention in recent years because of their excellent electronic, mechanical, thermal, and optical properties. Studying chemical properties of MXenes is important to prolong the shelf life of their colloids and provide robust performance of MXenes in devices and applications. While the role of MXene reactivity with the environment, including water and components of air, is becoming more recognized, less is known about the role of parameters influencing the reactivity. In this work, we investigate the individual and combined effects of the pH and antioxidant on chemical stability of Ti2CTx, Ti3CNTx, and Ti3C2Tx MXenes using GC, XPS, UV-vis, and Raman spectroscopy. In contrast to indirect indicators of MXene degradation, such as film conductivity or performance in electrochemical energy storage systems, we focus on detection of reaction products as the most sensitive and direct way of monitoring the chemical transformations of MXenes. Based on our knowledge of MXene chemistry and interactions with the environment, we propose a combination of sodium hydroxide and sodium l-ascorbate to effectively slow down degradation of MXenes in colloidal solutions by suppressing their hydrolysis and oxidation reactions, respectively.
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Affiliation(s)
- Shuohan Huang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.,Department of Chemistry, Missouri University of Science & Technology, Rolla, Missouri 65409, United States
| | - Vadym N Mochalin
- Department of Chemistry, Missouri University of Science & Technology, Rolla, Missouri 65409, United States.,Department of Materials Science & Engineering, Missouri University of Science & Technology, Rolla, Missouri 65409, United States
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3
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Opra DP, Neumoin AI, Sinebryukhov SL, Podgorbunsky AB, Kuryavyi VG, Mayorov VY, Ustinov AY, Gnedenkov SV. Moss-like Hierarchical Architecture Self-Assembled by Ultrathin Na2Ti3O7 Nanotubes: Synthesis, Electrical Conductivity, and Electrochemical Performance in Sodium-Ion Batteries. NANOMATERIALS 2022; 12:nano12111905. [PMID: 35683760 PMCID: PMC9182444 DOI: 10.3390/nano12111905] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Revised: 05/26/2022] [Accepted: 05/29/2022] [Indexed: 12/25/2022]
Abstract
Nanocrystalline layer-structured monoclinic Na2Ti3O7 is currently under consideration for usage in solid state electrolyte applications or electrochemical devices, including sodium-ion batteries, fuel cells, and sensors. Herein, a facile one-pot hydrothermal synthetic procedure is developed to prepare self-assembled moss-like hierarchical porous structure constructed by ultrathin Na2Ti3O7 nanotubes with an outer diameter of 6–9 nm, a wall thickness of 2–3 nm, and a length of several hundred nanometers. The phase and chemical transformations, optoelectronic, conductive, and electrochemical properties of as-prepared hierarchically-organized Na2Ti3O7 nanotubes have been studied. It is established that the obtained substance possesses an electrical conductivity of 3.34 × 10−4 S/cm at room temperature allowing faster motion of charge carriers. Besides, the unique hierarchical Na2Ti3O7 architecture exhibits promising cycling and rate performance as an anode material for sodium-ion batteries. In particular, after 50 charge/discharge cycles at the current loads of 50, 150, 350, and 800 mA/g, the reversible capacities of about 145, 120, 100, and 80 mA∙h/g, respectively, were achieved. Upon prolonged cycling at 350 mA/g, the capacity of approximately 95 mA∙h/g at the 200th cycle was observed with a Coulombic efficiency of almost 100% showing the retention as high as 95.0% initial storage. At last, it is found that residual water in the un-annealed nanotubular Na2Ti3O7 affects its electrochemical properties.
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Yuan X, Li W, Liu X. Comparative Study of Proton Exchange in Tri- and Hexatitanates: Correlations between Stability and Electronic Properties. Inorg Chem 2022; 61:3918-3930. [PMID: 35200001 DOI: 10.1021/acs.inorgchem.1c03497] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
A hydrothermal method is considered to be convenient and is extensively used in preparing titanate architectures, but the intermediate and final products are complicated and variable. To date, it is accepted that intermediates are tri- and hexatitanates. Here, atomic structures, energetics, and correlations between stability and electronic properties of proton exchange in tri- and hexatitanates, i.e., Na2-xHxTi3O7 and Na2-xHxTi6O13, are investigated by first-principles calculations. We found that the bond length of Na-O bonds plays a significant role in determining the activity of tunnel oxygen atoms, while the proton substitution sites are closely related to the activity of tunnel O atom in titanates. As H+ concentration increases, the formation energy of Na2-xHxTi3O7 and Na2-xHxTi6O13 decreases first and then increases, suggesting that completely protonated titanates, i.e., H2Ti3O7 and H2Ti6O13, are unstable. However, we found that H+ substitution would take place even in an alkaline solution both for Na2Ti3O7 and Na2Ti6O13. With a decrease in the pH, the process of H+ exchange becomes more energetically favorable. Compared to Na2Ti3O7, Na+ ions are more easily exchanged by H+ ions in Na2Ti6O13 at the same pH value. We found that there is a strong correlation between stability and electronic properties during the Na+-H+ exchange process. Finally, hydrogen bonds are observed in H2Ti3O7 and Na2-xHxTi6O13 complexes, which make them more stable than Na2-xHxTi3O7 complexes without H-bonds. All of these findings provide insight into understanding the geometry of possible intermediates in the preparation of titanates and suitable conditions for the synthesis of titanates.
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Affiliation(s)
- Xiaojia Yuan
- Center for Quantum Sciences and School of Physics, Northeast Normal University, Changchun 130117, China
| | - Wenli Li
- Center for Quantum Sciences and School of Physics, Northeast Normal University, Changchun 130117, China
| | - Xiaojie Liu
- Center for Quantum Sciences and School of Physics, Northeast Normal University, Changchun 130117, China.,Center for Advanced Optoelectronic Functional Materials Research, and Key Laboratory of UV Light-Emitting Materials and Technology of Ministry of Educations, Northeast Normal University, Changchun 130024, China
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Nature-Inspired Nanoflower Structures on Titanium Surface via Alkali Treatment for Biomedical Applications. JOURNAL OF BIOMIMETICS BIOMATERIALS AND BIOMEDICAL ENGINEERING 2021. [DOI: 10.4028/www.scientific.net/jbbbe.52.20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Titanium based metallic biomaterials for orthopedic implant applications are often associated with biocompatibility problems which can be ameliorated via proper surface modification strategies. Improving the hydrophilic nature of the titanium surface offers an effective strategy to sort out such limitations by intensifying the cellular activity. Development of titania as well as titanate layers on the titanium surface via alkali treatment represents an effective strategy to improve the hydrophilicity of native titanium surface. Inspired from nature, in the present work, we report the formation of three-dimensional (3D) hierarchical nanoflowers resembling Gomphrena globosa flowers developed on commercially pure titanium (cp-Ti) surface via a facile alkali treatment technique. X-ray diffraction studies evidenced anatase and rutile phases of TiO2 confirming the development of titania on the surface. In addition to the TiO2 phase, presence of titanate (Na2Ti3O7) has also been observed as alkali treatment was conducted in NaOH solution. The hydrophilicity of the Ti surface has been enhanced after the alkali treatment as evidenced from wettability studies using static contact angle measurements. This increase in hydrophilicity is due to the enrichment of the surface by TiO2 and titanate and increased roughness of nanoflower surface based on classical Wenzel law. In addition, the alkali-treated surface demonstrated an increased polar surface energy beneficial for biocompatible surfaces.
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Assessment of Titanate Nanolayers in Terms of Their Physicochemical and Biological Properties. MATERIALS 2021; 14:ma14040806. [PMID: 33567667 PMCID: PMC7915217 DOI: 10.3390/ma14040806] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 01/29/2021] [Accepted: 02/01/2021] [Indexed: 01/02/2023]
Abstract
The surface modification of titanium substrates and its alloys in order to improve their osseointegration properties is one of widely studied issues related to the design and production of modern orthopedic and dental implants. In this paper, we discuss the results concerning Ti6Al4V substrate surface modification by (a) alkaline treatment with a 7 M NaOH solution, and (b) production of a porous coating (anodic oxidation with the use of potential U = 5 V) and then treating its surface in the abovementioned alkaline solution. We compared the apatite-forming ability of unmodified and surface-modified titanium alloy in simulated body fluid (SBF) for 1–4 weeks. Analysis of the X-ray diffraction patterns of synthesized coatings allowed their structure characterization before and after immersing in SBF. The obtained nanolayers were studied using Raman spectroscopy, diffuse reflectance infrared Fourier transform spectroscopy (DRIFT), and scanning electron microscopy (SEM) images. Elemental analysis was carried out using X-ray energy dispersion spectroscopy (SEM EDX). Wettability and biointegration activity (on the basis of the degree of integration of MG-63 osteoblast-like cells, L929 fibroblasts, and adipose-derived mesenchymal stem cells cultured in vitro on the sample surface) were also evaluated. The obtained results proved that the surfaces of Ti6Al4V and Ti6Al4V covered by TiO2 nanoporous coatings, which were modified by titanate layers, promote apatite formation in the environment of body fluids and possess optimal biointegration properties for fibroblasts and osteoblasts.
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Huang C, Hu L, He J, Cui H, Zhu J, Yan J. Layered CsTi2NbO7 based anode materials: Effect of interlayered ions on the electrochemical properties. INORG CHEM COMMUN 2020. [DOI: 10.1016/j.inoche.2020.108283] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Wadge MD, Turgut B, Murray JW, Stuart BW, Felfel RM, Ahmed I, Grant DM. Developing highly nanoporous titanate structures via wet chemical conversion of DC magnetron sputtered titanium thin films. J Colloid Interface Sci 2020; 566:271-283. [PMID: 32006822 DOI: 10.1016/j.jcis.2020.01.073] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 01/13/2020] [Accepted: 01/19/2020] [Indexed: 12/22/2022]
Abstract
Titanate structures have been widely investigated as biomedical component surfaces due to their bioactive, osteoinductive and antibacterial properties. However, these surfaces are limited to Ti and its alloys, due to the nature of the chemical conversion employed. The authors present a new method for generating nanoporous titanate structures on alternative biomaterial surfaces, such as other metals/alloys, ceramics and polymers, to produce bioactive and/or antibacterial properties in a simple yet effective way. Wet chemical (NaOH; 5 M; 60 °C; 24 h) conversion of DC magnetron sputtered Ti surfaces on 316L stainless steel were investigated to explore effects of microstructure on sodium titanate conversion. It was found that the more equiaxed thin films (B/300) generated the thickest titanate structures (ca. 1.6 μm), which disagreed with the proposed hypothesis of columnar structures allowing greater NaOH ingress. All film parameters tested ultimately generated titanate structures, as confirmed via EDX, SEM, XPS, XRD, FTIR and Raman analyses. Additionally, the more columnar structures (NB/NH & B/NH) had a greater quantity of Na (ca. 26 at.%) in the top portion of the films, as confirmed via XPS, however, on average the Na content was consistent across the films (ca. 5-9 at.%). Film adhesion for the more columnar structures (ca. 42 MPa), even on polished substrates, were close to that of the FDA requirement for plasma-sprayed HA coatings (ca. 50 MPa). This study demonstrates the potential of these surfaces to be applied onto a wide variety of material types, even polymeric materials, due to the lower processing temperatures utilised, with the vision to generate bioactive and/or antibacterial properties on a plethora of bioinert materials.
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Affiliation(s)
- Matthew D Wadge
- Advanced Materials Research Group, Faculty of Engineering, University of Nottingham, UK.
| | - Burhan Turgut
- Advanced Materials Research Group, Faculty of Engineering, University of Nottingham, UK
| | - James W Murray
- Advanced Materials Research Group, Faculty of Engineering, University of Nottingham, UK
| | - Bryan W Stuart
- Advanced Materials Research Group, Faculty of Engineering, University of Nottingham, UK
| | - Reda M Felfel
- Advanced Materials Research Group, Faculty of Engineering, University of Nottingham, UK; Physics Department, Faculty of Science, Mansoura University, Mansoura, Egypt
| | - Ifty Ahmed
- Advanced Materials Research Group, Faculty of Engineering, University of Nottingham, UK
| | - David M Grant
- Advanced Materials Research Group, Faculty of Engineering, University of Nottingham, UK.
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9
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Altin S, Demirel S, Oz E, Altin E, Hetherington C, Bayri A, Avci S. Synthesis of Na 2Ti 3O 7 nanorods by a V-assisted route and investigation of their battery performance. CrystEngComm 2020. [DOI: 10.1039/c9ce01955c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the V-assisted synthesis of Na2Ti3O7 nanorods via a conventional solid state reaction technique.
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Affiliation(s)
- S. Altin
- Department of Physics
- Inonu University
- Malatya
- Turkey
| | - S. Demirel
- Department of Electricity and Energy
- Igdir University
- Igdir
- Turkey
| | - E. Oz
- Department of Physics
- Inonu University
- Malatya
- Turkey
| | - E. Altin
- IBTAM
- Inonu University
- Malatya
- Turkey
| | | | - A. Bayri
- Department of Physics
- Inonu University
- Malatya
- Turkey
| | - S. Avci
- Department of Engineering Physics
- Istanbul Medeniyet University
- Istanbul
- Turkey
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10
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Díaz de León JN, Rodríguez JR, Rojas J, Esqueda-Barrón Y, Cardenas L, Ramesh Kumar C, Alonso-Nuñez G, Fuentes-Moyado S. New Insight on the Formation of Sodium Titanates 1D Nanostructures and Its Application on CO 2 Hydrogenation. Front Chem 2019; 7:750. [PMID: 31781539 PMCID: PMC6856218 DOI: 10.3389/fchem.2019.00750] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 10/21/2019] [Indexed: 11/13/2022] Open
Abstract
The aim of this work is focused on the study of a series of non-traditional catalytic nanomaterials to transform greenhouse CO2 gas into added-value products. We found encouraging results of CO2 hydrogenation activity over sodium titanates with different morphologies. The yield to methanol increases with the increase in the Na incorporated in the nanostructures confirming the proposed mechanism. Samples were prepared at different times of hydrothermal treatment (HTT) with NaOH solutions, and these materials were labeled as Ti-nR-x with x as the hours on the HTT. HRTEM initially showed sphere-shaped nanoparticles in the TiO2 commercial nanopowder, increasing the HTT resulted in morphological changes in which the structures passed from nanosheets and finally to nanorods after 30 h. The X-ray diffraction and Raman spectroscopy results indicated the formation of sodium titanates such as Na2Ti3O7 with short Ti-O bonds and that Na begins to be incorporated into the distorted TiO6 crystalline structure after 5 h of HTT (until 12 wt%). The crystalline and shape transformation resulted in a significant modification on the textural properties passing from 51 m2.g−1 to 150 m2.g−1 and from a pore volume of 0.12 cm3.g−1 to 1.03 cm3.g−1 for Ti-ref and Ti-nR-30 respectively. We also observed differences in the electronic properties as the bandgap presented a blue shift from 3.16 eV on the TiO2 reference nano-powder to 3.44 eV for the Ti-nR-30 calcined sample. This fact coincides with the presence of a more electron-rich state of the Ti4+ and the formation of negative charge layer induced by the presence of Na+ interlayer cations detected by XPS analysis, at the same this helped us to explain the catalytic activity results.
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Affiliation(s)
- J Noé Díaz de León
- Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Ensenada, Mexico
| | - Jassiel R Rodríguez
- Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Ensenada, Mexico
| | - Joel Rojas
- Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Ensenada, Mexico
| | - Yasmin Esqueda-Barrón
- Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Ensenada, Mexico
| | - Luis Cardenas
- Institut de Recherches sur la Catalyse et l'Environnement de Lyon - IRCELYON - UMR 5256, CNRS-UCB Lyon 1, Université de Lyon, Lyon, France
| | - Chowdari Ramesh Kumar
- Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Ensenada, Mexico
| | - Gabriel Alonso-Nuñez
- Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Ensenada, Mexico
| | - Sergio Fuentes-Moyado
- Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Ensenada, Mexico
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11
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He J, Hu L, Li D, Zhu Y, Xu L, Liu X, Li Q. Structures and Brønsted acidity features for titanoniobates with different laminate composition. J SOLID STATE CHEM 2019. [DOI: 10.1016/j.jssc.2019.04.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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12
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Geng T, He J, Hu L, Li J. Structure and photocatalytic oxidation desulfurization performance of CeO2/HTi2NbO7-NS nanocomposite. INORG CHEM COMMUN 2019. [DOI: 10.1016/j.inoche.2019.01.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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13
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Hydrothermally synthesized highly dispersed Na2Ti3O7 nanotubes and their photocatalytic degradation and H2 evolution activity under UV and simulated solar light irradiation. KOREAN J CHEM ENG 2018. [DOI: 10.1007/s11814-017-0355-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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14
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Li J, Xu L, He J, Hu L, Da L, Wang B. Synthesis, characterization and enhanced visible-light photocatalytic activity of novel NiO/HTi2NbO7nanocomposite. NEW J CHEM 2018. [DOI: 10.1039/c8nj00877a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The decreased electron–hole recombination rate of the NiO/HTi2NbO7nanocomposite plays a crucial role in improving visible-light photocatalytic activity.
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Affiliation(s)
- Jie Li
- School of Chemical Engineering
- Anhui University of Science and Technology
- Huainan
- P. R. China
| | - Lei Xu
- School of Chemical Engineering
- Anhui University of Science and Technology
- Huainan
- P. R. China
| | - Jie He
- School of Chemical Engineering
- Anhui University of Science and Technology
- Huainan
- P. R. China
| | - Lifang Hu
- School of Chemical Engineering
- Anhui University of Science and Technology
- Huainan
- P. R. China
| | - Liangguo Da
- School of Chemical Engineering
- Anhui University of Science and Technology
- Huainan
- P. R. China
| | - Bin Wang
- School of Chemical Engineering
- Anhui University of Science and Technology
- Huainan
- P. R. China
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15
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Nguyen-Le MT, Lee BK, Tran DM. EDTA-Na 2 -assisted synthesis of rod-like titanate-TiO 2 composite architectures with enhanced visible-light-driven properties. J IND ENG CHEM 2017. [DOI: 10.1016/j.jiec.2017.07.015] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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16
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Holdsworth AF, Horrocks AR, Kandola BK. Synthesis and thermal analytical screening of metal complexes as potential novel fire retardants in polyamide 6.6. Polym Degrad Stab 2017. [DOI: 10.1016/j.polymdegradstab.2017.09.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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17
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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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Araújo-Filho AA, Silva FL, Righi A, da Silva MB, Silva BP, Caetano EW, Freire VN. Structural, electronic and optical properties of monoclinic Na 2 Ti 3 O 7 from density functional theory calculations: A comparison with XRD and optical absorption measurements. J SOLID STATE CHEM 2017. [DOI: 10.1016/j.jssc.2017.03.017] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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19
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Dong Y, Wu ZS, Zheng S, Wang X, Qin J, Wang S, Shi X, Bao X. Ti 3C 2 MXene-Derived Sodium/Potassium Titanate Nanoribbons for High-Performance Sodium/Potassium Ion Batteries with Enhanced Capacities. ACS NANO 2017; 11:4792-4800. [PMID: 28460161 DOI: 10.1021/acsnano.7b01165] [Citation(s) in RCA: 211] [Impact Index Per Article: 30.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Sodium and potassium ion batteries hold promise for next-generation energy storage systems due to their rich abundance and low cost, but are facing great challenges in optimum electrode materials for actual applications. Here, ultrathin nanoribbons of sodium titanate (M-NTO, NaTi1.5O8.3) and potassium titanate (M-KTO, K2Ti4O9) were successfully synthesized by a simultaneous oxidation and alkalization process of Ti3C2 MXene. Benefiting from the suitable interlayer spacing (0.90 nm for M-NTO, 0.93 nm for M-KTO), ultrathin thickness (<11 nm), narrow widths of nanoribbons (<60 nm), and open macroporous structures for enhanced ion insertion/extraction kinetics, the resulting M-NTO exhibited a large reversible capacity of 191 mAh g-1 at 200 mA g-1 for sodium storage, higher than those of pristine Ti3C2 (178 mAh g-1) and commercial TiC derivatives (86 mAh g-1). Notably, M-KTO displayed a superior reversible capacity of 151 mAh g-1 at 50 mA g-1 and 88 mAh g-1 at a high rate of 300 mA g-1 and long-term stable cyclability over 900 times, which outperforms other Ti-based layered materials reported to date. Moreover, this strategy is facile and highly flexible and can be extended for preparing a large number of MXene-derived materials, from the 60+ group of MAX phases, for various applications such as supercapacitors, batteries, and electrocatalysts.
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Affiliation(s)
| | | | - Shuanghao Zheng
- University of Chinese Academy of Sciences , 19 A Yuquan Road, Shijingshan District, Beijing 100049, People's Republic of China
| | - Xiaohui Wang
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences , 72 Wenhua Road, Shenyang 110016, People's Republic of China
| | - Jieqiong Qin
- University of Chinese Academy of Sciences , 19 A Yuquan Road, Shijingshan District, Beijing 100049, People's Republic of China
| | - Sen Wang
- University of Chinese Academy of Sciences , 19 A Yuquan Road, Shijingshan District, Beijing 100049, People's Republic of China
| | - Xiaoyu Shi
- Department of Chemical Physics, University of Science and Technology of China , 96 JinZhai Road, Hefei 230026, People's Republic of China
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Rahut S, Panda R, Basu JK. Solvothermal synthesis of a layered titanate nanosheets and its photocatalytic activity: Effect of Ag doping. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2017.03.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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21
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Ko JS, Doan-Nguyen VVT, Kim HS, Muller GA, Serino AC, Weiss PS, Dunn BS. Na 2Ti 3O 7 Nanoplatelets and Nanosheets Derived from a Modified Exfoliation Process for Use as a High-Capacity Sodium-Ion Negative Electrode. ACS APPLIED MATERIALS & INTERFACES 2017; 9:1416-1425. [PMID: 27996248 DOI: 10.1021/acsami.6b10790] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The increasing interest in Na-ion batteries (NIBs) can be traced to sodium abundance, its low cost compared to lithium, and its intercalation chemistry being similar to that of lithium. We report that the electrochemical properties of a promising negative electrode material, Na2Ti3O7, are improved by exfoliating its layered structure and forming 2D nanoscale morphologies, nanoplatelets, and nanosheets. Exfoliation of Na2Ti3O7 was carried out by controlling the amount of proton exchange for Na+ and then proceeding with the intercalation of larger cations such as methylammonium and propylammonium. An optimized mixture of nanoplatelets and nanosheets exhibited the best electrochemical performance in terms of high capacities in the range of 100-150 mA h g-1 at high rates with stable cycling over several hundred cycles. These properties far exceed those of the corresponding bulk material, which is characterized by slow charge-storage kinetics and poor long-term stability. The results reported in this study demonstrate that charge-storage processes directed at 2D morphologies of surfaces and few layers of sheets are an exciting direction for improving the energy and power density of electrode materials for NIBs.
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Affiliation(s)
- Jesse S Ko
- Department of Materials Science and Engineering, University of California, Los Angeles , Los Angeles, California 90095, United States
| | - Vicky V T Doan-Nguyen
- California NanoSystems Institute, University of California, Santa Barbara , Santa Barbara, California 93106, United States
- Materials Research Laboratory, University of California, Santa Barbara , Santa Barbara, California 93106, United States
| | - Hyung-Seok Kim
- Department of Materials Science and Engineering, University of California, Los Angeles , Los Angeles, California 90095, United States
| | - Guillaume A Muller
- Department of Materials Science and Engineering, University of California, Los Angeles , Los Angeles, California 90095, United States
| | - Andrew C Serino
- Department of Materials Science and Engineering, University of California, Los Angeles , Los Angeles, California 90095, United States
| | - Paul S Weiss
- Department of Materials Science and Engineering, University of California, Los Angeles , Los Angeles, California 90095, United States
- Department of Chemistry and Biochemistry, University of California, Los Angeles , Los Angeles, California 90095, United States
- California NanoSystems Institute, University of California, Los Angeles , Los Angeles, California 90095, United States
| | - Bruce S Dunn
- Department of Materials Science and Engineering, University of California, Los Angeles , Los Angeles, California 90095, United States
- California NanoSystems Institute, University of California, Los Angeles , Los Angeles, California 90095, United States
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22
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Nguyen-Le MT, Lee BK. Novel fabrication of a nitrogen-doped mesoporous TiO2-nanorod titanate heterojunction to enhance the photocatalytic degradation of dyes under visible light. RSC Adv 2016. [DOI: 10.1039/c6ra02826h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
One-pot synthesis of a mesoporous nitrogen-doped TiO2-nanorod titanate heterojunction was developed for effective photocatalytic degradation of dyes.
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Affiliation(s)
- Minh-Tri Nguyen-Le
- Department of Civil and Environmental Engineering
- University of Ulsan
- Ulsan 680-749
- Republic of Korea
| | - Byeong-Kyu Lee
- Department of Civil and Environmental Engineering
- University of Ulsan
- Ulsan 680-749
- Republic of Korea
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23
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Zhang Y, Jiang Z, Huang J, Lim LY, Li W, Deng J, Gong D, Tang Y, Lai Y, Chen Z. Titanate and titania nanostructured materials for environmental and energy applications: a review. RSC Adv 2015. [DOI: 10.1039/c5ra11298b] [Citation(s) in RCA: 217] [Impact Index Per Article: 24.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
The state-of-the-art development of fabrication strategies of multi-dimensional titanate and titania nanostructures is reviewed first. This is followed by an overview of their potential applications in environmental, energy, and biomedical sectors.
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Affiliation(s)
- Yanyan Zhang
- School of Materials Science and Engineering
- Nanyang Technological University
- Singapore
| | - Zhelong Jiang
- School of Materials Science and Engineering
- Nanyang Technological University
- Singapore
- Department of Materials Science and Engineering
- University of Illinois at Urbana-Champaign
| | - Jianying Huang
- National Engineering Laboratory for Modern Silk
- College of Textile and Clothing Engineering
- Soochow University
- Suzhou 215123
- China
| | - Linda Y. Lim
- School of Materials Science and Engineering
- Nanyang Technological University
- Singapore
- Department of Materials Science and Engineering and Department of Chemistry
- Stanford University
| | - Wenlong Li
- School of Materials Science and Engineering
- Nanyang Technological University
- Singapore
| | - Jiyang Deng
- School of Materials Science and Engineering
- Nanyang Technological University
- Singapore
| | - Dangguo Gong
- School of Materials Science and Engineering
- Nanyang Technological University
- Singapore
| | - Yuxin Tang
- School of Materials Science and Engineering
- Nanyang Technological University
- Singapore
| | - Yuekun Lai
- National Engineering Laboratory for Modern Silk
- College of Textile and Clothing Engineering
- Soochow University
- Suzhou 215123
- China
| | - Zhong Chen
- School of Materials Science and Engineering
- Nanyang Technological University
- Singapore
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24
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Goodall JBM, Kellici S, Illsley D, Lines R, Knowles JC, Darr JA. Optical and photocatalytic behaviours of nanoparticles in the Ti–Zn–O binary system. RSC Adv 2014. [DOI: 10.1039/c3ra48030e] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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25
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Feng M, You W, Wu Z, Chen Q, Zhan H. Mildly alkaline preparation and methylene blue adsorption capacity of hierarchical flower-like sodium titanate. ACS APPLIED MATERIALS & INTERFACES 2013; 5:12654-62. [PMID: 24246130 DOI: 10.1021/am404011k] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The hydrothermal preparation of flower-like layered sodium titanate architectures in a weakly alkaline medium is reported. NaCl was used as a morphology-directing agent, and a growth mechanism was proposed. The hierarchical structure is assembled from one-dimensional nanoribbons and exhibits an excellent removal capacity toward methylene blue (MB). A pseudo-second-order kinetic model was found to well describe the adsorption kinetics. Kinetic studies demonstrated that the overall rate of MB adsorption was controlled by surface adsorption and intraparticle diffusion. Results of this work are of great significance for environmental applications of flower-like layered sodium titanate architectures as a promising adsorbent material used for water purification.
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Affiliation(s)
- Miao Feng
- College of Materials Science and Engineering, Fuzhou University , 2 Xueyuan Road, Fuzhou 350108, People's Republic of China
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26
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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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27
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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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28
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Gruar RI, Tighe CJ, Darr JA. Scaling-up a Confined Jet Reactor for the Continuous Hydrothermal Manufacture of Nanomaterials. Ind Eng Chem Res 2013. [DOI: 10.1021/ie302567d] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Robert I. Gruar
- Department of Chemistry, University College London, Christopher Ingold Laboratories, 20 Gordon Street,
London, WC1H 0AJ, U.K
| | - Christopher J. Tighe
- Department of Chemistry, University College London, Christopher Ingold Laboratories, 20 Gordon Street,
London, WC1H 0AJ, U.K
| | - Jawwad A. Darr
- Department of Chemistry, University College London, Christopher Ingold Laboratories, 20 Gordon Street,
London, WC1H 0AJ, U.K
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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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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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32
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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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33
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Weng X, Knowles JC, Abrahams I, Wu Z, Darr JA. In situ variable temperature X-ray diffraction studies on the transformations of nano-precursors to La–Ni–O phases. J SOLID STATE CHEM 2011. [DOI: 10.1016/j.jssc.2011.04.031] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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34
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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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35
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Chaudhry AA, Yan H, Gong K, Inam F, Viola G, Reece MJ, Goodall JB, ur Rehman I, McNeil-Watson FK, Corbett JC, Knowles JC, Darr JA. High-strength nanograined and translucent hydroxyapatite monoliths via continuous hydrothermal synthesis and optimized spark plasma sintering. Acta Biomater 2011; 7:791-9. [PMID: 20883835 DOI: 10.1016/j.actbio.2010.09.029] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2010] [Revised: 09/08/2010] [Accepted: 09/10/2010] [Indexed: 11/25/2022]
Abstract
The synthesis of high-strength, completely dense nanograined hydroxyapatite (bioceramic) monoliths is a challenge as high temperatures or long sintering times are often required. In this study, nanorods of hydroxyapatite (HA) and calcium-deficient HA (made using a novel continuous hydrothermal flow synthesis method) were consolidated using spark plasma sintering (SPS) up to full theoretical density in ∼5 min at temperatures up to 1000°C. After significant optimization of the SPS heating and loading cycles, fully dense HA discs were obtained which were translucent, suggesting very high densities. Significantly high three-point flexural strength values for such materials (up to 158 MPa) were measured. Freeze-fracturing of disks followed by scanning electron microscopy investigation revealed selected samples possessed sub-200 nm sized grains and no visible pores, suggesting they were fully dense.
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36
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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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