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Wang X, He Y, Liu L, Song D, Kovarik L, Bowden ME, Engelhard M, Li X, Du Y, Miller QR, Wang C, De Yoreo JJ, Rosso KM, Zhang X. Uncovering the Size-Dependent Thermal Solid Transformation of Akaganéite. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2402717. [PMID: 39148218 DOI: 10.1002/smll.202402717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2024] [Revised: 07/06/2024] [Indexed: 08/17/2024]
Abstract
Investigating the structural evolution and phase transformation of iron oxides is crucial for gaining a deeper understanding of geological changes on diverse planets and preparing oxide materials suitable for industrial applications. In this study, in-situ heating techniques are employed in conjunction with transmission electron microscopy (TEM) observations and ex-situ characterization to thoroughly analyze the thermal solid-phase transformation of akaganéite 1D nanostructures with varying diameters. These findings offer compelling evidence for a size-dependent morphology evolution in akaganéite 1D nanostructures, which can be attributed to the transformation from akaganéite to maghemite (γ-Fe2O3) and subsequent crystal growth. Specifically, it is observed that akaganéite nanorods with a diameter of ∼50 nm transformed into hollow polycrystalline maghemite nanorods, which demonstrated remarkable stability without arresting crystal growth under continuous heating. In contrast, smaller akaganéite nanoneedles or nanowires with a diameter ranging from 20 to 8 nm displayed a propensity for forming single-crystal nanoneedles or nanowires through phase transformation and densification. By manipulating the size of the precursors, a straightforward method is developed for the synthesis of single-crystal and polycrystalline maghemite nanowires through solid-phase transformation. These significant findings provide new insights into the size-dependent structural evolution and phase transformation of iron oxides at the nanoscale.
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Affiliation(s)
- Xiang Wang
- Physical & Computational Science Directorate, Pacific Northwest National Laboratory, Richland, Washington, 99354, United States
| | - Yang He
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington, 99354, United States
- Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing, 10083, China
| | - Lili Liu
- Physical & Computational Science Directorate, Pacific Northwest National Laboratory, Richland, Washington, 99354, United States
| | - Duo Song
- Physical & Computational Science Directorate, Pacific Northwest National Laboratory, Richland, Washington, 99354, United States
| | - Libor Kovarik
- Physical & Computational Science Directorate, Pacific Northwest National Laboratory, Richland, Washington, 99354, United States
| | - Mark E Bowden
- Physical & Computational Science Directorate, Pacific Northwest National Laboratory, Richland, Washington, 99354, United States
| | - Mark Engelhard
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington, 99354, United States
| | - Xiaoxu Li
- Physical & Computational Science Directorate, Pacific Northwest National Laboratory, Richland, Washington, 99354, United States
| | - Yingge Du
- Physical & Computational Science Directorate, Pacific Northwest National Laboratory, Richland, Washington, 99354, United States
| | - Quin Rs Miller
- Physical & Computational Science Directorate, Pacific Northwest National Laboratory, Richland, Washington, 99354, United States
| | - Chongmin Wang
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington, 99354, United States
| | - James J De Yoreo
- Physical & Computational Science Directorate, Pacific Northwest National Laboratory, Richland, Washington, 99354, United States
- Department of Materials Science and Engineering, University of Washington, Seattle, Washington, 98195, United States
| | - Kevin M Rosso
- Physical & Computational Science Directorate, Pacific Northwest National Laboratory, Richland, Washington, 99354, United States
| | - Xin Zhang
- Physical & Computational Science Directorate, Pacific Northwest National Laboratory, Richland, Washington, 99354, United States
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2
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Ansari S, Suárez-López YDC, Thersleff T, Häggström L, Ericsson T, Katsaros I, Åhlén M, Karlgren M, Svedlindh P, Rinaldi-Ramos CM, Teleki A. Pharmaceutical Quality by Design Approach to Develop High-Performance Nanoparticles for Magnetic Hyperthermia. ACS NANO 2024; 18:15284-15302. [PMID: 38814737 PMCID: PMC11171760 DOI: 10.1021/acsnano.4c04685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2024] [Revised: 05/11/2024] [Accepted: 05/21/2024] [Indexed: 06/01/2024]
Abstract
Magnetic hyperthermia holds significant therapeutic potential, yet its clinical adoption faces challenges. One obstacle is the large-scale synthesis of high-quality superparamagnetic iron oxide nanoparticles (SPIONs) required for inducing hyperthermia. Robust and scalable manufacturing would ensure control over the key quality attributes of SPIONs, and facilitate clinical translation and regulatory approval. Therefore, we implemented a risk-based pharmaceutical quality by design (QbD) approach for SPION production using flame spray pyrolysis (FSP), a scalable technique with excellent batch-to-batch consistency. A design of experiments method enabled precise size control during manufacturing. Subsequent modeling linked the SPION size (6-30 nm) and composition to intrinsic loss power (ILP), a measure of hyperthermia performance. FSP successfully fine-tuned the SPION composition with dopants (Zn, Mn, Mg), at various concentrations. Hyperthermia performance showed a strong nonlinear relationship with SPION size and composition. Moreover, the ILP demonstrated a stronger correlation to coercivity and remanence than to the saturation magnetization of SPIONs. The optimal operating space identified the midsized (15-18 nm) Mn0.25Fe2.75O4 as the most promising nanoparticle for hyperthermia. The production of these nanoparticles on a pilot scale showed the feasibility of large-scale manufacturing, and cytotoxicity investigations in multiple cell lines confirmed their biocompatibility. In vitro hyperthermia studies with Caco-2 cells revealed that Mn0.25Fe2.75O4 nanoparticles induced 80% greater cell death than undoped SPIONs. The systematic QbD approach developed here incorporates process robustness, scalability, and predictability, thus, supporting the clinical translation of high-performance SPIONs for magnetic hyperthermia.
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Affiliation(s)
- Shaquib
Rahman Ansari
- Department
of Pharmacy, Science for Life Laboratory, Uppsala University, 75123 Uppsala, Sweden
| | | | - Thomas Thersleff
- Department
of Materials and Environmental Chemistry, Stockholm University, 10691 Stockholm, Sweden
| | - Lennart Häggström
- Department
of Physics and Astronomy, Uppsala University, 75121 Uppsala, Sweden
| | - Tore Ericsson
- Department
of Physics and Astronomy, Uppsala University, 75121 Uppsala, Sweden
| | - Ioannis Katsaros
- Department
of Materials Science and Engineering, Uppsala
University, 75103 Uppsala, Sweden
| | - Michelle Åhlén
- Department
of Materials Science and Engineering, Uppsala
University, 75103 Uppsala, Sweden
| | - Maria Karlgren
- Department
of Pharmacy, Uppsala University, 75123 Uppsala, Sweden
| | - Peter Svedlindh
- Department
of Materials Science and Engineering, Uppsala
University, 75103 Uppsala, Sweden
| | - Carlos M. Rinaldi-Ramos
- Department
of Chemical Engineering and J. Crayton Pruitt Family Department of
Biomedical Engineering, University of Florida, Gainesville, Florida 32611-6005, United
States
| | - Alexandra Teleki
- Department
of Pharmacy, Science for Life Laboratory, Uppsala University, 75123 Uppsala, Sweden
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3
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Andrzejewska W, Wojciechowski P, Dobrotvorska MV, Murawka S, Sobieszczyk P, Zelent M, Lewandowski M. Directional growth of iron oxide nanowires on a vicinal copper surface. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2024; 36:345004. [PMID: 38813672 DOI: 10.1088/1361-648x/ad3e58] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Accepted: 04/12/2024] [Indexed: 05/31/2024]
Abstract
Single-crystal magnetic nanostructures with well-defined shapes attract lots of interest due to their potential applications in magnetic and spintronic devices. However, development of methods allowing controlling their mutual crystallographic and geometric orientation constitutes a significant scientific challenge. One of the routes for obtaining such structures is to grow the materials epitaxially on naturally-structured supports, such as vicinal surfaces of single-crystal substrates. Iron oxides are among the most well-known magnetic materials which, depending on the phase, may exhibit ferro/ferri- or antiferromagnetic ordering. We have grown iron oxide nanowires on a Cu(410) single-crystal substrate faceted with molecular oxygen. Scanning tunneling microscopy and low energy electron diffraction revealed that the oxide grows in the [111] direction, along the step edges of the substrate and rotated by ±15° with respect to the [010] direction of copper atomic terraces (so that the the growing elongated structures are orientated parallel to each other). Notably, x-ray photoelectron spectroscopy confirmed that the nanowires represent the ferrimagneticγ-Fe2O3(maghemite) iron oxide phase, while micromagnetic simulations indicated that the wires are single-domain, with the easy magnetization axis orientated in-plane and along the long axis of the wire.
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Affiliation(s)
- Weronika Andrzejewska
- NanoBioMedical Centre, Adam Mickiewicz University, Wszechnicy Piastowskiej 3, 61-614 Poznań, Poland
| | - Paweł Wojciechowski
- NanoBioMedical Centre, Adam Mickiewicz University, Wszechnicy Piastowskiej 3, 61-614 Poznań, Poland
- Institute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179 Poznań, Poland
| | - Mariya V Dobrotvorska
- NanoBioMedical Centre, Adam Mickiewicz University, Wszechnicy Piastowskiej 3, 61-614 Poznań, Poland
| | - Szymon Murawka
- NanoBioMedical Centre, Adam Mickiewicz University, Wszechnicy Piastowskiej 3, 61-614 Poznań, Poland
| | - Paweł Sobieszczyk
- Institute of Nuclear Physics Polish Academy of Sciences, Radzikowskiego 152, 31-342 Kraków, Poland
| | - Mateusz Zelent
- Institute of Spintronics and Quantum Information, Faculty of Physics, Adam Mickiewicz University, Uniwersytetu Poznańskiego 2, 61-614 Poznań, Poland
| | - Mikołaj Lewandowski
- NanoBioMedical Centre, Adam Mickiewicz University, Wszechnicy Piastowskiej 3, 61-614 Poznań, Poland
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Chrystie RSM. A Review on 1-D Nanomaterials: Scaling-Up with Gas-Phase Synthesis. CHEM REC 2023; 23:e202300087. [PMID: 37309743 DOI: 10.1002/tcr.202300087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 05/04/2023] [Indexed: 06/14/2023]
Abstract
Nanowire-like materials exhibit distinctive properties comprising optical polarisation, waveguiding, and hydrophobic channelling, amongst many other useful phenomena. Such 1-D derived anisotropy can be further enhanced by arranging many similar nanowires into a coherent matrix, known as an array superstructure. Manufacture of nanowire arrays can be scaled-up considerably through judicious use of gas-phase methods. Historically, the gas-phase approach however has been extensively used for the bulk and rapid synthesis of isotropic 0-D nanomaterials such as carbon black and silica. The primary goal of this review is to document recent developments, applications, and capabilities in gas-phase synthesis methods of nanowire arrays. Secondly, we elucidate the design and use of the gas-phase synthesis approach; and finally, remaining challenges and needs are addressed to advance this field.
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Affiliation(s)
- Robin S M Chrystie
- Department of Chemical Engineering, King Fahd University of Petroleum & Minerals, KFUPM Box 5050, Dhahran, 31261, Saudi Arabia
- IRC for Membranes & Water Security, King Fahd University of Petroleum & Minerals, KFUPM Box 5051, Dhahran, 31261, Saudi Arabia
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5
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Ibrahim Fouad G, Mabrouk M, El-Sayed SAM, Rizk MZ, Beherei HH. Neurotherapeutic efficacy of loaded sulforaphane on iron oxide nanoparticles against cuprizone-induced neurotoxicity: role of MMP-9 and S100β. Toxicol Mech Methods 2023:1-17. [PMID: 36775846 DOI: 10.1080/15376516.2023.2177219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Abstract
Cuprizone (CUP) induces neurotoxicity and demyelination in animal models by provoking the activation of glial cells and the generation of reactive oxygen species (ROS). Sulforaphane (SF) is a phytochemical that exhibits a neuroprotective potential. In this study, we investigated the neurotherapeutic and pro-remyelinating activities of SF and SF-loaded within iron oxide nanoparticles (IONP-SF) in CUP-exposed rats. Magnetite iron oxide nanoparticles (IONPs) were prepared using the hydrothermal method that was further loaded with SF (IONP-SF). The loading of SF within the magnetite nanoparticles was assessed using FTIR, TEM, DLS, Zetasizer, and XPS. For the in vivo investigations, adult male Wistar rats (n = 40) were administrated either on a regular diet or a diet with CUP (0.2%) for 5 weeks. The rats were divided into four groups: negative control, CUP-induced, CUP + SF, and CUP + IONP-SF. CUP-exposed brains exhibited a marked elevation in lipid peroxidation, along with a significant decrease in the activities of glutathione peroxidase (GPx), and catalase (CAT). In addition, CUP intoxication downregulated the expression of myelin basic protein (MBP) and myelin proteolipid protein (PLP), upregulated the expression of Matrix metallopeptidase-9 (MMP-9) and S100β, and increased caspase-3 immunoexpression, these results were supported histopathologically in the cerebral cortexes. Treatment of CUP-rats with either SF or IONP-SF demonstrated remyelinating and neurotherapeutic activities. We could conclude that IONP-SF was more effective than free SF in mitigating the CUP-induced downregulation of MBP, upregulation of S100β, and caspase-3 immunoexpression.
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Affiliation(s)
- Ghadha Ibrahim Fouad
- Department of Therapeutic Chemistry, Pharmaceutical and Drug Industries Research Institute, National Research Centre, Cairo, Egypt
| | - Mostafa Mabrouk
- Refractories, Ceramics and Building Materials Department, Advanced Materials, Technology and Mineral Resources Research Institute, National Research Centre, Cairo, Egypt
| | - Sara A M El-Sayed
- Refractories, Ceramics and Building Materials Department, Advanced Materials, Technology and Mineral Resources Research Institute, National Research Centre, Cairo, Egypt
| | - Maha Z Rizk
- Department of Therapeutic Chemistry, Pharmaceutical and Drug Industries Research Institute, National Research Centre, Cairo, Egypt
| | - Hanan H Beherei
- Refractories, Ceramics and Building Materials Department, Advanced Materials, Technology and Mineral Resources Research Institute, National Research Centre, Cairo, Egypt
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Jia H, Sun J, Dong M, Dong H, Zhang H, Xie X. Deep eutectic solvent electrolysis for preparing water-soluble magnetic iron oxide nanoparticles. NANOSCALE 2021; 13:19004-19011. [PMID: 34755160 DOI: 10.1039/d1nr05813d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Magnetic iron oxide nanoparticles have been proven to have versatile applications in biomedicine. Although numerous strategies have been developed to synthesize hydrophilic magnetic nanoparticles, there is still a challenge in the quantity and controllability of preparation of highly dispersible, stably water-dispersive magnetic nanoparticles. The current work presents a deep-eutectic solvent electrolysis to synthesize magnetic nanoparticles. In the electrolysis process, iron atoms at the anode electrode are oxidized to ferric ions, and then the ferric ions are combined with reactive oxygen species that derived from the decomposition of deep-eutectic solvents to form iron oxide nanocrystals. Concomitantly, hydrophilic radicals of amine groups produced by electrolyte decomposition are grafted on the particles. The monodisperse nanoparticle size ranged from 6 to 9 nm. The hydrophilic group loaded nanoparticles can be highly dispersed in water with neither surface post-modification nor organic stabilizers. The hydrodynamic particle diameter is between 20 and 30 nm. The transparent aqueous dispersions can be maintained for more than 600 days without precipitation.
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Affiliation(s)
- Haiyang Jia
- School of Physics and New Energy, Xuzhou University of Technology, Xuzhou 221018, China.
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University, Nanjing 210096, China.
| | - Jiawei Sun
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University, Nanjing 210096, China.
- College of Electronic and Information Engineering, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Meng Dong
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University, Nanjing 210096, China.
| | - Hui Dong
- School of Mechanical Engineering, Xiangtan University, Xiangtan 411105, China
| | - Hongtao Zhang
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University, Nanjing 210096, China.
| | - Xiao Xie
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University, Nanjing 210096, China.
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7
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Ghasemzadeh MA, Elyasi Z, Monfared MRZ. Enhanced Removal of Methyl Violet Dye from Aqueous Solution by a Novel Co3O4@SiO2@TiO2-Ag Heterogeneous Semiconductor. Comb Chem High Throughput Screen 2021; 25:883-894. [PMID: 33645475 DOI: 10.2174/1386207324666210301090123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 01/28/2021] [Accepted: 02/08/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND This research introduces the application of a novel photocatalyst including Co3O@SiO2@TiO2-Ag nanocomposite with highly photocatalytic stability and core-shell structure for the removal of toxic methyl violet from aqueous solution. OBJECTIVE The removal of toxic dyes and organic contaminants from water is outstanding research area between scientists. Methyl violet as a toxic cationic pollutant has disruptive influence for humans. In this research, with a aim to remove to methyl violet from the wastewater we developed a new photocatalyst including Co3O4@SiO2@TiO2-Ag nanocomposite as a eco-friendly and low-cost nanostructure with high photocatalytic activity in order to reduce the risks of this pollutant from aqueous media. METHODS The Co3O4@SiO2@TiO2-Ag nanostructure was prepared via hydrothermal and sol-gel methods and the structure elucidation of the prepared photocatalyst was analyzed by different spectroscopy techniques including XRD, FT-IR, FE-SEM, TEM, VSM and EDX. RESULTS Photodegradation of methyl violet in the presence of different structures showed that Co3O4@SiO2@TiO2-Ag is superior photocatalytic activity (about 98% was decomposed after 40 min) compared to the previous shells and pure Co3O4 NPs. Loadings of SiO2@TiO2-Ag nanocomposite over the Co3O4 surface led to the reduction in the band gap energy of visible light and improvement in the photocatalytic activity of Methyl Violet dye for the aqueous phase decomposition. CONCLUSION The remarkable benefits of this nanocomposite are highly photocatalytic efficiency in the degradation of methyl violet (almost 100 % within 1 h), easy magnetic separation, low cost, and high chemical stability. The collected results demonstrated the rate of degradation is increased by increasing the irradiation time, while the rate of degradation is decreased by dye concentration.
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Affiliation(s)
- Mohammad Ali Ghasemzadeh
- Department of Chemistry, Qom Branch, Islamic Azad University, Qom, I. R. Iran Post Box: 37491-13191. Iran
| | - Zahar Elyasi
- Department of Chemistry, Qom Branch, Islamic Azad University, Qom, I. R. Iran Post Box: 37491-13191. Iran
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A review of green methods for phyto-fabrication of hematite (α-Fe 2O 3) nanoparticles and their characterization, properties, and applications. Heliyon 2021; 7:e05806. [PMID: 33490660 PMCID: PMC7809383 DOI: 10.1016/j.heliyon.2020.e05806] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Revised: 09/01/2020] [Accepted: 12/17/2020] [Indexed: 01/12/2023] Open
Abstract
The aim of the current work is the introduction of a quick and simple literature survey about the bio-fabrication of the Alpha Hematite nanoparticles (α-Fe2O3) using the plant extracts green method. The survey manifested the utilities of the environmentally friendly biosynthesis methods via extracting different plant species, some of its important physicochemical properties, various instrumental analysis characterization tools, and potential applications.
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9
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Norouzi F, Javanshir S. Magnetic γFe 2O 3@Sh@Cu 2O: an efficient solid-phase catalyst for reducing agent and base-free click synthesis of 1,4-disubstituted-1,2,3-triazoles. BMC Chem 2020; 14:1. [PMID: 31922150 PMCID: PMC6945398 DOI: 10.1186/s13065-019-0657-9] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2019] [Accepted: 12/18/2019] [Indexed: 01/04/2023] Open
Abstract
A hybrid magnetic material γFe2O3@Sh@cu2O was easily prepared from Shilajit (Sh) decorated Fe3O4 and copper acetate. The prepared magnetic hybrid material was fully characterized using different analysis, including Fourier transform infrared (FT-IR), X-ray diffraction (XRD), inductively coupled plasma (ICP), scanning electron microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS), vibrating sample magnetometer (VSM) thermal gravimetric analysis (TGA) and Brunauer–Emmett–Teller (BET). All these analysis revealed that during coating of Fe3O4@Sh using copper salt (II), synchronized redox sorption of CuII to CuI occurs at the same time as the oxidation of Fe3O4 to γFe2O3. This magnetic catalyst exhibited excellent catalytic activity for regioselective synthesis of 1,4-disubstituted-1,2,3-triazoles via one pot three-component click reaction of sodium azide, terminal alkynes and benzyl halides in the absence of any reducing agent. High yields, short reaction time, high turnover number and frequency (TON = 3.5 * 105 and TOF = 1.0 * 106 h−1 respectively), easy separation, and efficient recycling of the catalyst are the strengths of the present method.![]()
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Affiliation(s)
- Fereshteh Norouzi
- Heterocyclic Chemistry Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran, 16846-13114 Iran
| | - Shahrzad Javanshir
- Heterocyclic Chemistry Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran, 16846-13114 Iran
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10
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Applied Stress-Assisted Growth of Single Crystal γ-Fe₂O₃ Nanowires. NANOMATERIALS 2018; 8:nano8121037. [PMID: 30545107 PMCID: PMC6316481 DOI: 10.3390/nano8121037] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 12/10/2018] [Accepted: 12/11/2018] [Indexed: 11/17/2022]
Abstract
It is difficult to obtain γ-Fe2O3 nanostructures by heating iron substrate in ambient conditions because γ-Fe2O3 is less thermodynamically stable than α-Fe2O3. In this work, we synthesize γ-Fe2O3 nanowires by heating iron particles under an external force. The stacking style of iron and oxygen ions under a strong shearing stress tends to adopt the γ-Fe2O3 structure regardless of the thermodynamic restriction. These γ-Fe2O3 nanowires exhibit a clear ferromagnetic property. Transmission electron microscopy (TEM) and X-ray diffraction (XRD) measurements confirm that γ-phase structure appears only under the applied external force during the heating period. A window of the magnitude of the external force is found to help the nanowire growth on iron particles. The growth mechanism of γ-Fe2O3 nanowires other than α-Fe2O3 under the external force is discussed and an applied stress-assisted growth model is proposed. This work presents an easy approach to produce ferromagnetic iron oxide nanowires on a large scale.
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11
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Shao C, Han J, Liu G, Wang Z, Zhao Y, Zong X, Li C. Fabrication of a Robust Tantalum Nitride Photoanode from a Flame-Heating-Derived Compact Oxide Film. CHEMPHOTOCHEM 2017. [DOI: 10.1002/cptc.201700178] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Chenyi Shao
- State Key Laboratory of Catalysis; Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, The Collaborative Innovation Center of Chemistry for, Energy Materials (iChEM); Zhongshan Road 457 Dalian 116023 P.R. China
- University of Chinese Academy of Sciences; Beijing 100049 P.R. China
| | - Jingfeng Han
- State Key Laboratory of Catalysis; Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, The Collaborative Innovation Center of Chemistry for, Energy Materials (iChEM); Zhongshan Road 457 Dalian 116023 P.R. China
| | - Guiji Liu
- State Key Laboratory of Catalysis; Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, The Collaborative Innovation Center of Chemistry for, Energy Materials (iChEM); Zhongshan Road 457 Dalian 116023 P.R. China
| | - Zhiliang Wang
- State Key Laboratory of Catalysis; Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, The Collaborative Innovation Center of Chemistry for, Energy Materials (iChEM); Zhongshan Road 457 Dalian 116023 P.R. China
| | - Yongle Zhao
- State Key Laboratory of Catalysis; Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, The Collaborative Innovation Center of Chemistry for, Energy Materials (iChEM); Zhongshan Road 457 Dalian 116023 P.R. China
- University of Chinese Academy of Sciences; Beijing 100049 P.R. China
| | - Xu Zong
- State Key Laboratory of Catalysis; Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, The Collaborative Innovation Center of Chemistry for, Energy Materials (iChEM); Zhongshan Road 457 Dalian 116023 P.R. China
| | - Can Li
- State Key Laboratory of Catalysis; Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, The Collaborative Innovation Center of Chemistry for, Energy Materials (iChEM); Zhongshan Road 457 Dalian 116023 P.R. China
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12
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Cai L, McClellan CJ, Koh AL, Li H, Yalon E, Pop E, Zheng X. Rapid Flame Synthesis of Atomically Thin MoO 3 down to Monolayer Thickness for Effective Hole Doping of WSe 2. NANO LETTERS 2017; 17:3854-3861. [PMID: 28537732 DOI: 10.1021/acs.nanolett.7b01322] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Two-dimensional (2D) molybdenum trioxide (MoO3) with mono- or few-layer thickness can potentially advance many applications, ranging from optoelectronics, catalysis, sensors, and batteries to electrochromic devices. Such ultrathin MoO3 sheets can also be integrated with other 2D materials (e.g., as dopants) to realize new or improved electronic devices. However, there is lack of a rapid and scalable method to controllably grow mono- or few-layer MoO3. Here, we report the first demonstration of using a rapid (<2 min) flame synthesis method to deposit mono- and few-layer MoO3 sheets (several microns in lateral dimension) on a wide variety of layered materials, including mica, MoS2, graphene, and WSe2, based on van der Waals epitaxy. The flame-grown ultrathin MoO3 sheet functions as an efficient hole doping layer for WSe2, enabling WSe2 to reach the lowest sheet and contact resistance reported to date among all the p-type 2D materials (∼6.5 kΩ/□ and ∼0.8 kΩ·μm, respectively). These results demonstrate that flame synthesis is a rapid and scalable pathway to growing atomically thin 2D metal oxides, opening up new opportunities for advancing 2D electronics.
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Affiliation(s)
- Lili Cai
- Department of Mechanical Engineering, Stanford University , Stanford, California 94305, United States
| | - Connor J McClellan
- Department of Electrical Engineering, Stanford University , Stanford, California 94305, United States
| | - Ai Leen Koh
- Stanford Nano Shared Facilities, Stanford University , Stanford, California 94305, United States
| | - Hong Li
- Department of Mechanical Engineering, Stanford University , Stanford, California 94305, United States
- School of Mechanical and Aerospace Engineering, Nanyang Technological University , Singapore 639798
| | - Eilam Yalon
- Department of Electrical Engineering, Stanford University , Stanford, California 94305, United States
| | - Eric Pop
- Department of Electrical Engineering, Stanford University , Stanford, California 94305, United States
- Department of Materials Science and Engineering, Stanford University , Stanford, California 94305, United States
| | - Xiaolin Zheng
- Department of Mechanical Engineering, Stanford University , Stanford, California 94305, United States
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13
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Li Q, Man P, Yuan L, Zhang P, Li Y, Ai S. Ruthenium supported on CoFe layered double oxide for selective hydrogenation of 5-hydroxymethylfurfural. MOLECULAR CATALYSIS 2017. [DOI: 10.1016/j.mcat.2017.01.011] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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14
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Song T, Zhang P, Zeng J, Wang T, Ali A, Zeng H. Boosting the photocatalytic H2 evolution activity of Fe2O3 polymorphs (α-, γ- and β-Fe2O3) by fullerene [C60]-modification and dye-sensitization under visible light irradiation. RSC Adv 2017. [DOI: 10.1039/c7ra03451b] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Different morphologies of Fe2O3 polymorphs were constructed and modified by fluorescein sensitization and C60 cocatalyst to prepare highly active photocatalysts.
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Affiliation(s)
- Ting Song
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- P. R. China
| | - Piyong Zhang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- P. R. China
| | - Jian Zeng
- Department of Chemistry
- National University of Singapore
- Singapore
| | - Tingting Wang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- P. R. China
| | - Atif Ali
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- P. R. China
| | - Heping Zeng
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- P. R. China
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15
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High saturation magnetization of γ-Fe2O3 nano-particles by a facile one-step synthesis approach. Sci Rep 2016; 6:32360. [PMID: 27581732 PMCID: PMC5007676 DOI: 10.1038/srep32360] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Accepted: 08/05/2016] [Indexed: 11/15/2022] Open
Abstract
We have demonstrated the synthesis of γ-Fe2O3 nano-particles through a facile and novel calcination process in the air. There is no pH regulation, gas atmosphere, additive, centrifugation or other complicated procedures during the preparing process. A detailed formation process of the nano-particles is proposed, and DMF as a polar solvent may slower the reaction process of calcination. The structures, morphologies, and magnetic properties of γ-Fe2O3 nano-particles were investigated systematically, and the pure γ-Fe2O3 nano-particles obtained at 200 °C display uniform morphology good magnetic property. The saturation magnetization of obtained pure γ-Fe2O3 is about 74 emu/g, which is comparable with bulk material (76 emu/g) and larger than other results. In addition, the photocatalytic activity for degradation of methylene blue is also studied, which shows proper photocatalytic activity.
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16
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Ren X, Yang H, Tang J, Li ZA, Su YK, Geng S, Zhou J, Zhang X, Cheng Z. An effective way to increase the high-frequency permeability of Fe3O4 nanorods. NANOSCALE 2016; 8:12910-12916. [PMID: 27305587 DOI: 10.1039/c6nr03305a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Uniform Fe3O4 magnetic nanorods (NRs) were successfully synthesized and oriented in epoxy resin under a rotating magnetic field. Magnetic induction fields within and around a single Fe3O4 nanorod in the remanence state were obtained by off-axis electron holography. The induction fields indicated a single domain state of the highly anisotropic Fe3O4 nanorod due to its strong magnetic shape anisotropy. Quantitative magnetic moment analysis of the obtained phase image yielded an average magnetization of 0.53 T of a single Fe3O4 nanorod. Moreover, the real part of the permeability (μ') of magnetic-oriented Fe3O4 NRs is obviously higher than that of random Fe3O4 NRs in the GHz range. The oriented Fe3O4 NRs exhibit a higher resonance peak at 4.75 GHz compared to the bulk counterpart (1.2 GHz) in the frequency dependence of μ in the range of 1-10 GHz. Moreover, the calculated μ value of the oriented Fe3O4 NRs could be improved to 4.22 with the increased dipolar interaction strength using the OOMMF software. These results could play a guiding significance in the development of an effective method to improve the permeability of magnetic nanomaterials at GHz working frequency.
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Affiliation(s)
- Xiao Ren
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, P. R. China.
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17
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Allen P, Cai L, Zhou L, Zhao C, Rao PM. Rapid Synthesis of Thin and Long Mo17O47 Nanowire-Arrays in an Oxygen Deficient Flame. Sci Rep 2016; 6:27832. [PMID: 27271194 PMCID: PMC4897683 DOI: 10.1038/srep27832] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Accepted: 05/25/2016] [Indexed: 11/09/2022] Open
Abstract
Mo17O47 nanowire-arrays are promising active materials and electrically-conductive supports for batteries and other devices. While high surface area resulting from long, thin, densely packed nanowires generally leads to improved performance in a wide variety of applications, the Mo17O47 nanowire-arrays synthesized previously by electrically-heated chemical vapor deposition under vacuum conditions were relatively thick and short. Here, we demonstrate a method to grow significantly thinner and longer, densely packed, high-purity Mo17O47 nanowire-arrays with diameters of 20-60 nm and lengths of 4-6 μm on metal foil substrates using rapid atmospheric flame vapor deposition without any chamber or walls. The atmospheric pressure and 1000 °C evaporation temperature resulted in smaller diameters, longer lengths and order-of-magnitude faster growth rate than previously demonstrated. As explained by kinetic and thermodynamic calculations, the selective synthesis of high-purity Mo17O47 nanowires is achieved due to low oxygen partial pressure in the flame products as a result of the high ratio of fuel to oxidizer supplied to the flame, which enables the correct ratio of MoO2 and MoO3 vapor concentrations for the growth of Mo17O47. This flame synthesis method is therefore a promising route for the growth of composition-controlled one-dimensional metal oxide nanomaterials for many applications.
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Affiliation(s)
- Patrick Allen
- Department of Mechanical Engineering, Worcester Polytechnic Institute, Worcester, MA 01609, USA
| | - Lili Cai
- Department of Mechanical Engineering, Stanford University, Stanford, CA 94305, USA
| | - Lite Zhou
- Department of Mechanical Engineering, Worcester Polytechnic Institute, Worcester, MA 01609, USA.,Materials Science and Engineering Graduate Program, Worcester Polytechnic Institute, Worcester, MA 01609, USA
| | - Chenqi Zhao
- Department of Mechanical Engineering, Worcester Polytechnic Institute, Worcester, MA 01609, USA.,Materials Science and Engineering Graduate Program, Worcester Polytechnic Institute, Worcester, MA 01609, USA
| | - Pratap M Rao
- Department of Mechanical Engineering, Worcester Polytechnic Institute, Worcester, MA 01609, USA.,Materials Science and Engineering Graduate Program, Worcester Polytechnic Institute, Worcester, MA 01609, USA
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18
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Sundar S, Mariappan R, Min K, Piraman S. Facile biosurfactant assisted biocompatible α-Fe2O3 nanorods and nanospheres synthesis, magneto physicochemical characteristics and their enhanced biomolecules sensing ability. RSC Adv 2016. [DOI: 10.1039/c6ra15290b] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Tunable magnetic and electrocatalytic characteristics of α-Fe2O3 nanostructures were fabricated by tapping saponin induced anisotropic growth, demonstrated excellent electrocatalytic activity towards dopamine and uric acid with wider potential gap.
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Affiliation(s)
- Sasikala Sundar
- Sustainable Energy and Smart Materials Research Lab
- Department of Nanoscience and Technology
- Alagappa University
- Karaikudi-630 002
- India
| | | | - Kim Min
- College of Science and Technology
- Dongguk University
- Gyeongju-780 714
- South Korea
| | - Shakkthivel Piraman
- Sustainable Energy and Smart Materials Research Lab
- Department of Nanoscience and Technology
- Alagappa University
- Karaikudi-630 002
- India
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19
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Cao D, Pan L, Li H, Li J, Wang X, Cheng X, Wang Z, Wang J, Liu Q. A facile strategy for synthesis of spinel ferrite nano-granules and their potential applications. RSC Adv 2016. [DOI: 10.1039/c6ra13373h] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A number of spinel ferrite nano-granules were synthesized in DMF through a calcination process under air.
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Affiliation(s)
- Derang Cao
- Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education
- Lanzhou University
- Lanzhou 730000
- People's Republic of China
| | - Lining Pan
- Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education
- Lanzhou University
- Lanzhou 730000
- People's Republic of China
| | - Hao Li
- Key Laboratory of Special Function Materials and Structure Design
- Ministry of Education
- Lanzhou University
- Lanzhou 730000
- People's Republic of China
| | - Jianan Li
- Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education
- Lanzhou University
- Lanzhou 730000
- People's Republic of China
| | - Xicheng Wang
- Key Laboratory of Special Function Materials and Structure Design
- Ministry of Education
- Lanzhou University
- Lanzhou 730000
- People's Republic of China
| | - Xiaohong Cheng
- Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education
- Lanzhou University
- Lanzhou 730000
- People's Republic of China
| | - Zhenkun Wang
- Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education
- Lanzhou University
- Lanzhou 730000
- People's Republic of China
| | - Jianbo Wang
- Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education
- Lanzhou University
- Lanzhou 730000
- People's Republic of China
- Key Laboratory of Special Function Materials and Structure Design
| | - Qingfang Liu
- Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education
- Lanzhou University
- Lanzhou 730000
- People's Republic of China
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20
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Dong Z, Huo D, Kear BH, Tse SD. Combined flame and solution synthesis of nanoscale tungsten-oxide and zinc/tin-oxide heterostructures. NANOSCALE 2015; 7:20510-20520. [PMID: 26585764 DOI: 10.1039/c5nr05829e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Heterostructures of tungsten-oxide nanowires decorated with zinc/tin-oxide nanostructures are synthesized via a combined flame and solution synthesis approach. Vertically well-aligned tungsten-oxide nanowires are grown on a tungsten substrate by a flame synthesis method. Here, tetragonal WO(2.9) nanowires (diameters of 20-50 nm, lengths >10 μm, and coverage density of 10(9)-10(10) cm(-2)) are produced by the vapor-solid mechanism at 1720 K. Various kinds of Zn/Sn-oxide nanostructures are grown or deposited on the WO(2.9) nanowires by adjusting the Sn(2+) : Zn(2+) molar ratio in an aqueous ethylenediamine solution at 65 °C. With WO(2.9) nanowires serving as the base structures, sequential growth or deposition on them of hexagonal ZnO nanoplates, Zn(2)SnO(4) nanocubes, and SnO(2) nanoparticles are attained for Sn(2+) : Zn(2+) ratios of 0 : 1, 1 : 10, and 10 : 1, respectively, along with different saturation conditions. High-resolution transmission electron microscopy of the interfaces at the nanoheterojunctions shows abrupt interfaces for ZnO/WO(2.9) and Zn(2)SnO(4)/WO(2.9), despite lattice mismatches of >20%.
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Affiliation(s)
- Zhizhong Dong
- Department of Mechanical and Aerospace Engineering, Rutgers University, Piscataway, New Jersey 08854, USA.
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21
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Ding JR, Kim KS. Facile growth of 1-D nanowire-based WO3
thin films with enhanced photoelectrochemical performance. AIChE J 2015. [DOI: 10.1002/aic.15105] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Jin-Rui Ding
- Dept. of Chemical Engineering; Kangwon National University; Chuncheon Kangwon-Do 200-701 Korea
| | - Kyo-Seon Kim
- Dept. of Chemical Engineering; Kangwon National University; Chuncheon Kangwon-Do 200-701 Korea
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22
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Huang G, He E, Wang Z, Fan H, Shangguan J, Croiset E, Chen Z. Synthesis and Characterization of γ-Fe2O3 for H2S Removal at Low Temperature. Ind Eng Chem Res 2015. [DOI: 10.1021/acs.iecr.5b01398] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Guan Huang
- State Key
Laboratory of Coal Science and Technology, Co-founded by Shanxi Province
and the Ministry of Science and Technology, Institute for Chemical
Engineering of Coal, Taiyuan University of Technology, West Yingze
Street Number 79, Taiyuan 030024, People’s Republic of China
| | - Enyun He
- State Key
Laboratory of Coal Science and Technology, Co-founded by Shanxi Province
and the Ministry of Science and Technology, Institute for Chemical
Engineering of Coal, Taiyuan University of Technology, West Yingze
Street Number 79, Taiyuan 030024, People’s Republic of China
| | - Zhongde Wang
- State Key
Laboratory of Coal Science and Technology, Co-founded by Shanxi Province
and the Ministry of Science and Technology, Institute for Chemical
Engineering of Coal, Taiyuan University of Technology, West Yingze
Street Number 79, Taiyuan 030024, People’s Republic of China
| | - Huiling Fan
- State Key
Laboratory of Coal Science and Technology, Co-founded by Shanxi Province
and the Ministry of Science and Technology, Institute for Chemical
Engineering of Coal, Taiyuan University of Technology, West Yingze
Street Number 79, Taiyuan 030024, People’s Republic of China
| | - Ju Shangguan
- State Key
Laboratory of Coal Science and Technology, Co-founded by Shanxi Province
and the Ministry of Science and Technology, Institute for Chemical
Engineering of Coal, Taiyuan University of Technology, West Yingze
Street Number 79, Taiyuan 030024, People’s Republic of China
| | - Eric Croiset
- Department of Chemical Engineering, University of Waterloo, 200 University
Avenue West, Waterloo, Ontario N2L3G1, Canada
| | - Zhongwei Chen
- Department of Chemical Engineering, University of Waterloo, 200 University
Avenue West, Waterloo, Ontario N2L3G1, Canada
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23
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Geng H, Ge D, Lu S, Wang J, Ye Z, Yang Y, Zheng J, Gu H. Preparation of a γ-Fe2 O3 /Ag nanowire coaxial nanocable for high-performance lithium-ion batteries. Chemistry 2015; 21:11129-33. [PMID: 26102517 DOI: 10.1002/chem.201500819] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2015] [Indexed: 11/07/2022]
Abstract
In this study, we report the design and synthesis of a silver nanowire-γ-Fe2 O3 coaxial nanocable architecture (Ag NWs@γ-Fe2 O3 nanocable) through mild oxidation of [Fe(CO)5 ] on the surface of silver nanowires followed by a calcination process. After optimization of the structural design, the Ag NWs@γ-Fe2 O3 nanocable could deliver superior lithium storage performance in terms of high reversible capacity, good rate performance, and excellent stability, such as a high reversible capacity of about 890 mA h g(-1) after 60 cycles at a current rate of 0.1 C (1.0 C=1005 mA g(-1) ). The reversible capacity remains as high as about 550 mA h g(-1) even at a high current rate of 2.0 C. This dramatic performance is mainly attributed to the smart coaxial design, which can not only alleviate the large volume change and prevent the aggregation of γ-Fe2 O3 nanoparticles, but also enables good conductivity and thus enhances fast charge transfer. The unique structural features of the Ag NWs@γ-Fe2 O3 nanocable represent a promising anode material in lithium-ion battery applications.
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Affiliation(s)
- Hongbo Geng
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123 (P.R. China).,College of Physics, Optolectronics and Energy, Soochow University, Suzhou, 215006 (P.R. China)
| | - Danhua Ge
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123 (P.R. China)
| | - Shuanglong Lu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123 (P.R. China)
| | - Jiaqing Wang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123 (P.R. China)
| | - Zhengmao Ye
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123 (P.R. China)
| | - Yonggang Yang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123 (P.R. China)
| | - Junwei Zheng
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123 (P.R. China). .,College of Physics, Optolectronics and Energy, Soochow University, Suzhou, 215006 (P.R. China).
| | - Hongwei Gu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123 (P.R. China).
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24
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Kaur N, Kaur Shahi S, Singh V. Synthesis, characterization and photocatalytic activity of magnetically separable γ-Fe2O3/N,Fe codoped TiO2 heterojunction for degradation of Reactive Blue 4 dye. RSC Adv 2015. [DOI: 10.1039/c5ra07812a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Nanocrystalline undoped, N-doped and N,Fe codoped TiO2 have been synthesized using a sol–gel method for the photocatalytic degradation of Reactive Blue 4 dye under visible light, with N,Fe codoped TiO2 exhibiting the best activity.
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Affiliation(s)
- Navneet Kaur
- Department of Applied Sciences (Chemistry)
- PEC University of Technology
- Chandigarh 160012
- India
| | - Satwant Kaur Shahi
- Department of Applied Sciences (Chemistry)
- PEC University of Technology
- Chandigarh 160012
- India
| | - Vasundhara Singh
- Department of Applied Sciences (Chemistry)
- PEC University of Technology
- Chandigarh 160012
- India
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25
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Sundar S, Piraman S. Greener saponin induced morphologically controlled various polymorphs of nanostructured iron oxide materials for biosensor applications. RSC Adv 2015. [DOI: 10.1039/c5ra15166j] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Biological synthesis of three different polymorphs of iron oxide nanostructures in one-pot reaction through greener saponin have been fabricated for biomolecules determination.
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Affiliation(s)
- Sasikala Sundar
- Sustainable Energy and Smart Materials Research Lab
- Department of Nanoscience and Technology
- Alagappa University
- Karaikudi-630 002
- India
| | - Shakkthivel Piraman
- Sustainable Energy and Smart Materials Research Lab
- Department of Nanoscience and Technology
- Alagappa University
- Karaikudi-630 002
- India
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26
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He Q, Yuan T, Yan X, Luo Z, Haldolaarachchige N, Young DP, Wei S, Guo Z. One-pot synthesis of size- and morphology-controlled 1-D iron oxide nanochains with manipulated magnetic properties. Chem Commun (Camb) 2014; 50:201-3. [PMID: 24217186 DOI: 10.1039/c3cc47377e] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Polypropylene grafted maleic anhydride (PP-MA, 2500 g mole(-1)) has demonstrated its unique capability to synthesize 1-D ferromagnetic hard (292.7 Oe) γ-Fe2O3 nanochains made of ~24 nm nanoparticles vs. PP-MA with 8000 g mole(-1) for the synthesis of 1-D ferromagnetic soft (70.5 Oe) γ-Fe2O3 nanochains (30 nm) made of flowerlike nanoparticles.
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Affiliation(s)
- Qingliang He
- Integrated Composites Laboratory (ICL), Dan F. Smith Department of Chemical Engineering, Lamar University, Beaumont, Texas 77710, USA.
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27
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Cui HJ, Cai JK, Zhao H, Yuan B, Ai C, Fu ML. One step solvothermal synthesis of functional hybrid γ-Fe2O3/carbon hollow spheres with superior capacities for heavy metal removal. J Colloid Interface Sci 2014; 425:131-5. [DOI: 10.1016/j.jcis.2014.03.049] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2014] [Revised: 03/01/2014] [Accepted: 03/14/2014] [Indexed: 11/25/2022]
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28
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Rao PM, Cai L, Liu C, Cho IS, Lee CH, Weisse JM, Yang P, Zheng X. Simultaneously efficient light absorption and charge separation in WO3/BiVO4 core/shell nanowire photoanode for photoelectrochemical water oxidation. NANO LETTERS 2014; 14:1099-105. [PMID: 24437363 DOI: 10.1021/nl500022z] [Citation(s) in RCA: 280] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We report a scalably synthesized WO3/BiVO4 core/shell nanowire photoanode in which BiVO4 is the primary light-absorber and WO3 acts as an electron conductor. These core/shell nanowires achieve the highest product of light absorption and charge separation efficiencies among BiVO4-based photoanodes to date and, even without an added catalyst, produce a photocurrent of 3.1 mA/cm(2) under simulated sunlight and an incident photon-to-current conversion efficiency of ∼ 60% at 300-450 nm, both at a potential of 1.23 V versus RHE.
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Affiliation(s)
- Pratap M Rao
- Department of Mechanical Engineering, Stanford University , Stanford, California 94305, United States
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29
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Cui HJ, Cai JK, Shi JW, Yuan B, Ai CL, Fu ML. Fabrication of 3D porous Mn doped α-Fe2O3 nanostructures for the removal of heavy metals from wastewater. RSC Adv 2014. [DOI: 10.1039/c3ra46348f] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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30
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Dong Z, Al-Sharab JF, Kear BH, Tse SD. Combined flame and electrodeposition synthesis of energetic coaxial tungsten-oxide/aluminum nanowire arrays. NANO LETTERS 2013; 13:4346-4350. [PMID: 23899165 DOI: 10.1021/nl4021446] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A nanostructured thermite composite comprising an array of tungsten-oxide (WO2.9) nanowires (diameters of 20-50 nm and lengths of >10 μm) coated with single-crystal aluminum (thickness of ~16 nm) has been fabricated. The method involves combined flame synthesis of tungsten-oxide nanowires and ionic-liquid electrodeposition of aluminum. The geometry not only presents an avenue to tailor heat-release characteristics due to anisotropic arrangement of fuel and oxidizer but also eliminates or minimizes the presence of an interfacial Al2O3 passivation layer. Upon ignition, the energetic nanocomposite exhibits strong exothermicity, thereby being useful for fundamental study of aluminothermic reactions as well as enhancing combustion characteristics.
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Affiliation(s)
- Zhizhong Dong
- Department of Mechanical and Aerospace Engineering, Rutgers University , Piscataway, New Jersey 08854, United States
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31
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Hou X, Jiang H, Hu Y, Li Y, Huo J, Li C. In situ deposition of hierarchical architecture assembly from Sn-filled CNTs for lithium-ion batteries. ACS APPLIED MATERIALS & INTERFACES 2013; 5:6672-6677. [PMID: 23777621 DOI: 10.1021/am401442v] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
In this paper, we have demonstrated a hierarchical architecture assembly from Sn-filled CNTs, which was in situ deposited on Cu foils to form binder-free electrode by incorporating flame aerosol deposition (FAD) with chemical vapor deposition (CVD) processes. The reversible capacity of Sn-filled CNTs hierarchical architecture anode exhibited above 1000 mA h g(-1) before 30th cycle and stabilized at 437 mA h g(-1) after 100 cycles at a current density of 100 mA g(-1). Even at as high as 2 A g(-1), the capacity still maintained 429 mA h g(-1). The desirable cycling life and rate capacities performance were attributed to great confinement of tin in the interior of CNTs and the superior conducting network constructed by the 3D hierarchical architecture. The novel, rapid and scalable synthetic route was designed to prepare binder-free electrode with high electrochemical performance and avoid long-time mixing of active materials, binder, and carbon black, which is expected to be one of promising preparation of Sn/C anodes in lithium-ion batteries.
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Affiliation(s)
- Xiaoyu Hou
- Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science & Technology, Shanghai 200237, China
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Fan HL, Sun T, Zhao YP, Shangguan J, Lin JY. Three-dimensionally ordered macroporous iron oxide for removal of H2S at medium temperatures. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013; 47:4859-4865. [PMID: 23528010 DOI: 10.1021/es304791b] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A series of iron oxide sorbents with novel structures of three-dimensionally ordered macropores (3DOM), ranging in size from 60 to 550 nm, were fabricated and creatively used as sorbents for the removal of H2S at medium temperatures of 300-350 °C. Evaluation tests using thermogravimetric analysis (TGA) and a fixed-bed reactor showed that, in comparison to the iron oxide sorbent prepared by a conventional mixing method, the fabricated iron oxide sorbent with a 3DOM structure exhibited much higher reactivity and efficiency, as well as high sorbent utilization with low regeneration temperature. The excellent performance of 3DOM iron oxide as a sulfur sorbent is attributed to its special texture, i.e., the open and interconnected macroporous, large surface area, and nanoparticles of iron oxide, which are revealed by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and nitrogen adsorption techniques. The investigation results of the pore effect on the performance of the sorbent show that sorbents with pores size around 150 nm in diameter revealed the best performance. The reason is that pores of this size are large enough to allow gas to pass through even if the channel is partially blocked during the reaction process while remaining a large surface area that can provide more active sites for the reaction.
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Affiliation(s)
- Hui-Ling Fan
- State Key Laboratory of Coal Science and Technology, Co-founded by Shanxi Province and the Ministry of Science and Technology, Institute for Chemical Engineering of Coal, Taiyuan University of Technology, West Yingze Street Number 79, Taiyuan 030024, People's Republic of China
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Cui B, Peng H, Xia H, Guo X, Guo H. Magnetically recoverable core–shell nanocomposites γ-Fe2O3@SiO2@TiO2–Ag with enhanced photocatalytic activity and antibacterial activity. Sep Purif Technol 2013. [DOI: 10.1016/j.seppur.2012.10.008] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Sharma G, Jeevanandam P. Synthesis of self-assembled prismatic iron oxide nanoparticles by a novel thermal decomposition route. RSC Adv 2013. [DOI: 10.1039/c2ra22004k] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
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Yang S, Xu Y, Cao Y, Zhang G, Sun Y, Gao D. Zn(ii)-doped γ-Fe2O3 single-crystalline nanoplates with high phase-transition temperature, superparamagnetic property and good photocatalytic property. RSC Adv 2013. [DOI: 10.1039/c3ra43695k] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
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Yang H, Mao Y, Li M, Liu P, Tong Y. Electrochemical synthesis of CoFe2O4 porous nanosheets for visible light driven photoelectrochemical applications. NEW J CHEM 2013. [DOI: 10.1039/c3nj00627a] [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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He Q, Yuan T, Zhu J, Luo Z, Haldolaarachchige N, Sun L, Khasanov A, Li Y, Young DP, Wei S, Guo Z. Magnetic high density polyethylene nanocomposites reinforced with in-situ synthesized Fe@FeO core-shell nanoparticles. POLYMER 2012. [DOI: 10.1016/j.polymer.2012.06.010] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Abstract
Room temperature ferromagnetism has been observed in freshly synthesized and post-annealed SnO₂ nanosheets. The results of x-ray diffraction and x-ray photoelectron spectroscopy reveal that the newly synthesized samples and those annealed at 400 °C under either an O₂ or Ar atmosphere possess rutile structure and no other impurity phases are observed. The fitting results of the O 1s and Sn 3d spectra from SnO₂ samples annealed at 400 °C under an O₂ or Ar atmosphere both indicate that oxygen vacancies inevitably exist in these samples. It is found that the saturation magnetization of all the annealed samples does not feature mono-dependence on oxygen vacancies, whereas an Sn vacancy related origin seems more plausible to account for variations in the magnetization of samples studied. This finding corresponds to first-principle calculation results from our previous work. Furthermore, the Curie temperature of SnO₂ nanosheets was estimated to be around 300 °C, rendering it a very good option for the next generation of spintronics.
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Affiliation(s)
- Cen Wang
- International Center for New-Structured Materials (ICNSM), Zhejiang University and Laboratory of New-Structured Materials (LNSM), Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China
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Qin L, Zhu Q, Li G, Liu F, Pan Q. Controlled fabrication of flower–like ZnO–Fe2O3 nanostructured films with excellent lithium storage properties through a partly sacrificed template method. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm30277b] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Mou X, Wei X, Li Y, Shen W. Tuning crystal-phase and shape of Fe2O3 nanoparticles for catalytic applications. CrystEngComm 2012. [DOI: 10.1039/c2ce25109d] [Citation(s) in RCA: 93] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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