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Zhang Z, Polak MP, Carlos C, Dong Y, Morgan D, Wang X. Strong Room-Temperature Ferromagnetism in Ultrathin NiOOH Nanosheets through Surfactant Manipulation. ACS NANO 2023; 17:22979-22989. [PMID: 37955390 DOI: 10.1021/acsnano.3c08233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2023]
Abstract
Two-dimensional (2D) ferromagnetic (FM) materials with nanoscale thickness and spontaneous net magnetization have emerged as a promising class of functional materials for applications in next-generation spintronics, quantum processing, and data storage devices. However, most 2D materials exhibit weak FM even at low temperatures, limiting their potential applications in many technological fields. The fabrication of strong room-temperature FM 2D materials is highly desirable for the development of practical applications. Here, we demonstrate an ionic layer epitaxy strategy to synthesize few-layered NiOOH nanosheets with strong room-temperature FM and a saturation magnetization up to 409.86 emu cm-3 at 300 K. The results are consistent with the ab initio predictions of a stable FM NiOOH nanolayer structure with an FM configuration. The FM strength of the NiOOH nanosheets can be tuned by controlling the surfactant monolayer density and annealing. This work offers a promising strategy for achieving strong high-temperature FM in 2D materials for spintronic applications.
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Affiliation(s)
- Ziyi Zhang
- Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Maciej P Polak
- Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Corey Carlos
- Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Yutao Dong
- Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Dane Morgan
- Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Xudong Wang
- Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
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Wang Y, Wang J, Wei J, Wang C, Wang H, Yang X. Catalytic Mechanisms and Active Species of Benzene Hydroxylation Reaction System Based on Fe-Based Enzyme-Mimetic Structure. Catal Letters 2022. [DOI: 10.1007/s10562-022-04238-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Li C, Zhao M, Wang X, Fang Z, Chen Y, Bao H. Desulfurization mechanism of thioether compounds in heavy oil on the (111) surface of inverse spinel Fe 3O 4. Phys Chem Chem Phys 2022; 24:16220-16227. [PMID: 35758063 DOI: 10.1039/d2cp02135h] [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
The elimination of S-containing compounds in heavy oil is of significant importance to viscosity reduction and oil quality elevation in order to enhance oil recovery. In this study, the decomposition behavior of S-containing compounds in heavy oil was elucidated from a theoretical perspective in conjunction with simulative experiments. CH3SCH3 was employed as a model molecule on behalf of straight-chain saturated sulfides in heavy oil. The common cost-friendly inverse spinel Fe3O4 was selected as the catalyst. Our theoretical calculations revealed that the most feasible reaction pathway of entire CH3SCH3 decomposition occurred in two steps with the assistance of weakly adsorbed H2O molecules, generating two CH3OH molecules and one H2S molecule, of which the first step was the rate-determining step. These calculated results were confirmed with experimental results, which contributed to a clear and reliable catalytic desulfurization mechanism for S-containing compounds in heavy oil during aquathermolysis.
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Affiliation(s)
- Chen Li
- School of Materials Science and Engineering, State Key Laboratory of New Textile Materials & Advanced Processing Technology, Wuhan Textile University, 1 Jiangxia Road, Wuhan 430200, China. .,Faculty of Materials Science and Chemistry, China University of Geosciences, 388 Lumo Road, Wuhan, 430074, China
| | - Mengmeng Zhao
- School of Materials Science and Engineering, State Key Laboratory of New Textile Materials & Advanced Processing Technology, Wuhan Textile University, 1 Jiangxia Road, Wuhan 430200, China.
| | - Xing Wang
- School of Materials Science and Engineering, State Key Laboratory of New Textile Materials & Advanced Processing Technology, Wuhan Textile University, 1 Jiangxia Road, Wuhan 430200, China.
| | - Zheng Fang
- School of Materials Science and Engineering, State Key Laboratory of New Textile Materials & Advanced Processing Technology, Wuhan Textile University, 1 Jiangxia Road, Wuhan 430200, China.
| | - Yanling Chen
- Faculty of Materials Science and Chemistry, China University of Geosciences, 388 Lumo Road, Wuhan, 430074, China
| | - Haifeng Bao
- School of Materials Science and Engineering, State Key Laboratory of New Textile Materials & Advanced Processing Technology, Wuhan Textile University, 1 Jiangxia Road, Wuhan 430200, China.
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Duan Y, Chakraborty B, Tiwari CK, Baranov M, Tubul T, Leffler N, Neyman A, Weinstock IA. Solution-State Catalysis of Visible Light-Driven Water Oxidation by Macroanion-Like Inorganic Complexes of γ-FeOOH Nanocrystals. ACS Catal 2021. [DOI: 10.1021/acscatal.1c02824] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Yan Duan
- Department of Chemistry, Ben Gurion University of the Negev and the Ilse Katz Institute for Nanoscale Science & Technology, Beer Sheva 84105, Israel
| | - Biswarup Chakraborty
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Chandan Kumar Tiwari
- Department of Chemistry, Ben Gurion University of the Negev and the Ilse Katz Institute for Nanoscale Science & Technology, Beer Sheva 84105, Israel
| | - Mark Baranov
- Department of Chemistry, Ben Gurion University of the Negev and the Ilse Katz Institute for Nanoscale Science & Technology, Beer Sheva 84105, Israel
| | - Tal Tubul
- Department of Chemistry, Ben Gurion University of the Negev and the Ilse Katz Institute for Nanoscale Science & Technology, Beer Sheva 84105, Israel
| | - Nitai Leffler
- Department of Chemistry, Ben Gurion University of the Negev and the Ilse Katz Institute for Nanoscale Science & Technology, Beer Sheva 84105, Israel
| | - Alevtina Neyman
- Department of Chemistry, Ben Gurion University of the Negev and the Ilse Katz Institute for Nanoscale Science & Technology, Beer Sheva 84105, Israel
| | - Ira A. Weinstock
- Department of Chemistry, Ben Gurion University of the Negev and the Ilse Katz Institute for Nanoscale Science & Technology, Beer Sheva 84105, Israel
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Hydrothermal Synthesis of FeOOH and Fe2O3 Modified Self-Organizing Immobilized TiO2 Nanotubes for Photocatalytic Degradation of 1H-Benzotriazole. Catalysts 2020. [DOI: 10.3390/catal10121371] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
In this study, titanium dioxide nanotubes were prepared by electrochemical anodization technique and modified with an aqueous solution of FeCl3 using hydrothermal synthesis method to control the amount and distribution of iron compounds on the anatase TiO2 nanotubes. The objective was to synthesize immobilized FeOOH@TiO2 or Fe2O3@TiO2 photocatalysts designed for the flow-through reactor systems; to investigate thermal treatment effect on the photocatalytic efficiency; to determine appropriate Fe-compounds concentration for the maximum photocatalytic activity improvement, and to explain the mechanism responsible for the enhancement. The photocatalysts were tested for the degradation of 1H-benzotriazole in water under UV/solar light irradiation. Up to two times increase in the photocatalytic activity was obtained when TiO2 nanotubes were modified with 0.8 mM Fe. At higher Fe concentrations (8 mM and 80 mM), the photocatalytic activity of the given photocatalysts decreased. To confirm the formation of FeOOH or Fe2O3 species, and to clarify the mechanism of photoactivity, X-ray diffraction (XRD), Raman spectroscopy (RS), Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray spectroscopy (EDS) and UV-Vis spectroscopy were used.
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Morikawa T, Gul S, Nishimura YF, Suzuki TM, Yano J. Operando X-ray absorption spectroscopy of hyperfine β-FeOOH nanorods modified with amorphous Ni(OH) 2 under electrocatalytic water oxidation conditions. Chem Commun (Camb) 2020; 56:5158-5161. [PMID: 32255061 DOI: 10.1039/d0cc00692k] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Operando X-ray absorption spectroscopy was employed to study an active electrocatalyst, hyperfine β-FeOOH nanorods (∅ 3 × 15 nm) surface-modified with amorphous Ni hydroxide. The nearest neighbor structure and valence of Fe3+ ions did not change under water oxidation conditions, while changes in the nearest neighbor ordering of Ni2+ ions and a reversible transition to Ni3+ were observed in accordance with the electrical bias for the reaction.
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Affiliation(s)
- Takeshi Morikawa
- Toyota Central R&D Labs., Inc., 41-1 Yokomichi, Nagakute, Aichi 480-1192, Japan.
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Mukai K, Suzuki TM, Uyama T, Nonaka T, Morikawa T, Yamada I. High-pressure synthesis of ε-FeOOH from β-FeOOH and its application to the water oxidation catalyst. RSC Adv 2020; 10:44756-44767. [PMID: 35516263 PMCID: PMC9058670 DOI: 10.1039/d0ra09895g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Accepted: 11/25/2020] [Indexed: 01/01/2023] Open
Abstract
Research on materials under extreme conditions such as high pressures provides new insights into the evolution and dynamics of the earth and space sciences, but recently, this research has focused on applications as functional materials. In this contribution, we examined high-pressure/high-temperature phases of β-FeO1−x(OH)1+xClx with x = 0.12 (β-FeOOH) and their catalytic activities of water oxidation, i.e., oxygen evolution reaction (OER). Under pressures above 6 GPa and temperatures of 100–700 °C, β-FeOOH transformed into ε-FeOOH, as in the case of α-FeOOH. However, the established pressure–temperature phase diagram of β-FeOOH differs from that of α-FeOOH, probably owing to its open framework structure and partial occupation of Cl− ions. The OER activities of ε-FeOOH strongly depended on the FeOOH sources, synthesis conditions, and composite electrodes. Nevertheless, one of the ε-FeOOH samples exhibited a low OER overpotential compared with α-FeOOH and its parent β-FeOOH, which are widely used as OER catalysts. Hence, ε-FeOOH is a potential candidate as a next-generation earth-abundant OER catalyst. Research on materials under extreme conditions such as high pressures provides new insights into the evolution and dynamics of the earth and space sciences, but recently, this research has focused on applications as functional materials.![]()
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Affiliation(s)
- Kazuhiko Mukai
- Toyota Central Research & Development Laboratories
- Nagakute
- Japan
| | | | - Takeshi Uyama
- Toyota Central Research & Development Laboratories
- Nagakute
- Japan
| | - Takamasa Nonaka
- Toyota Central Research & Development Laboratories
- Nagakute
- Japan
| | | | - Ikuya Yamada
- Department of Materials Science
- Graduate School of Engineering
- Osaka Prefecture University
- Sakai
- Japan
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