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Meng X, Xu W, Ren X, Zhu M. Progress and Challenges of Ferrite Matrix Microwave Absorption Materials. MATERIALS (BASEL, SWITZERLAND) 2024; 17:2315. [PMID: 38793383 PMCID: PMC11123132 DOI: 10.3390/ma17102315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2024] [Revised: 05/07/2024] [Accepted: 05/09/2024] [Indexed: 05/26/2024]
Abstract
Intelligent devices, when subjected to multiple interactions, tend to generate electromagnetic pollution, which can disrupt the normal functioning of electronic components. Ferrite, which acts as a microwave-absorbing material (MAM), offers a promising strategy to overcome this issue. To further enhance the microwave absorption properties of ferrite MAM, numerous works have been conducted, including ion doping and combining with other materials. Notably, the microstructure is also key factor that affects the microwave absorption properties of ferrite-based MAM. Thus, this article provides a comprehensive overview of research progress on the influence of the microstructure on ferrite-based MAM. MAMs with sheet and layered structures are also current important research directions. For core-shell structure composites, the solid core-shell structure, hollow core-shell structure, yolk-eggshell structure, and non-spherical core-shell structure are introduced. For porous composites, the biomass porous structure and other porous structures are presented. Finally, the development trends are summarized, and prospects for the structure design and preparation of high-performance MAMs are predicted.
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Affiliation(s)
- Xianfeng Meng
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China; (W.X.); (X.R.)
| | | | | | - Maiyong Zhu
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China; (W.X.); (X.R.)
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Neysi M, Elhamifar D. Yolk-shell structured magnetic mesoporous organosilica supported ionic liquid/Cu complex: an efficient nanocatalyst for the green synthesis of pyranopyrazoles. Front Chem 2023; 11:1235415. [PMID: 37744055 PMCID: PMC10514497 DOI: 10.3389/fchem.2023.1235415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Accepted: 08/17/2023] [Indexed: 09/26/2023] Open
Abstract
The preparation of yolk-shell structured magnetic mesoporous composites is a significant subject between researchers. Especially, modification of theses composites with ionic liquid/metal complex is very important for catalytic processes. In the present study, a novel magnetic methylene-based periodic mesoporous organosilica (PMO)-supported ionic liquid/Cu complex with yolk-shell structure (YS-Fe3O4@PMO/IL-Cu) was prepared via the soft template-assisted method. The TGA, FT-IR, SEM, EDX, XRD, VSM, nitrogen-sorption, and ICP techniques were employed to identify YS-Fe3O4@PMO/IL-Cu. The YS-Fe3O4@PMO/IL-Cu material was applied as a powerful nanocatalyst for the synthesis of pyranopyrazoles under ultrasonic media. The study demonstrated that the YS-Fe3O4@PMO/IL-Cu nanocatalyst is highly recyclable, selective, and effective. The leaching test was performed to investigate the nature of the designed catalyst under the applied conditions.
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Zhu B, Gao Y, Hao H, Ji G, Yang C, Wang F, Su J, Wu X, Song X, Ma L, Li G, Tian Y. One-pot synthesis of coal gangue–derived NiCG composite for enhancing microwave absorption. Colloids Surf A Physicochem Eng Asp 2023. [DOI: 10.1016/j.colsurfa.2023.131305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
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Wang J, Chen Y, Wei Y, Li Y, Li F, Li B, Wu Q, Zhao J. Enhancement of microwave absorption performance of porous carbon induced by Ce (CO 3) OH. Front Chem 2023; 10:1100111. [PMID: 36700076 PMCID: PMC9870177 DOI: 10.3389/fchem.2022.1100111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 11/22/2022] [Indexed: 01/10/2023] Open
Abstract
In recent years, electromagnetic pollution has become more and more serious, resulting in a very negative impact on people's health. Therefore, it is important to develop efficient microwave absorbers to reduce electromagnetic pollution. Here, we construct a novel absorbing material of the polymer gel-derived porous carbon decorated by rare earth compounds (Ce (CO3) OH). When the thickness is 2.2 mm, the composite exhibits excellent microwave absorption performance with the optimal RLmin value and EAB reached up to -47.67 dB and 5.52 GHz, respectively, covering the Ku band. The high-efficiency microwave absorption is mainly attributed to the synergistic effect of dipole polarization, defect polarization and interfacial polarization. This work not only provides a new view for designing superior absorber materials, but also lay a foundation for their real applications.
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Affiliation(s)
- Jijun Wang
- Chinese People’s Liberation Army, Beijing, China,Institute of Defense Engineering, Academy of Military Sciences, Beijing, China
| | - Yuhua Chen
- Institute of Defense Engineering, Academy of Military Sciences, Beijing, China
| | - Yaxing Wei
- Institute of Defense Engineering, Academy of Military Sciences, Beijing, China
| | - Yan Li
- Institute of Defense Engineering, Academy of Military Sciences, Beijing, China
| | - Fangyuan Li
- Institute of Defense Engineering, Academy of Military Sciences, Beijing, China
| | - Bingzhen Li
- Institute of Defense Engineering, Academy of Military Sciences, Beijing, China,*Correspondence: Bingzhen Li, ; Qingqing Wu, ; Jinlong Zhao,
| | - Qingqing Wu
- Institute of Defense Engineering, Academy of Military Sciences, Beijing, China,*Correspondence: Bingzhen Li, ; Qingqing Wu, ; Jinlong Zhao,
| | - Jinlong Zhao
- Institute of Defense Engineering, Academy of Military Sciences, Beijing, China,*Correspondence: Bingzhen Li, ; Qingqing Wu, ; Jinlong Zhao,
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Yang L, Zhang S, Shan X, Ha C, An Q, Xiao Z, Li W, Zhai S. Multifunctional Fe3O4/TiO2/NH2-UiO-66 with integrated interfacial features for favorable phosphate adsorption. NEW J CHEM 2022. [DOI: 10.1039/d2nj02852b] [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
Excessive use and discharge of phosphate are the decisive factors leading to water eutrophication, and adsorption is deemed among the most effective methods in phosphorus capture. This study prepared the...
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Li H, Chong B, Xu B, Wells N, Yan X, Yang G. Nanoconfinement-Induced Conversion of Water Chemical Adsorption Properties in Nanoporous Photocatalysts to Improve Photocatalytic Hydrogen Evolution. ACS Catal 2021. [DOI: 10.1021/acscatal.1c03447] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- He Li
- XJTU-Oxford International Joint Laboratory for Catalysis, School of Chemical Engineering and Technology, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, China
| | - Ben Chong
- XJTU-Oxford International Joint Laboratory for Catalysis, School of Chemical Engineering and Technology, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, China
| | - Baorong Xu
- XJTU-Oxford International Joint Laboratory for Catalysis, School of Chemical Engineering and Technology, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, China
| | - Nathan Wells
- XJTU-Oxford International Joint Laboratory for Catalysis, School of Chemical Engineering and Technology, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, China
| | - Xiaoqing Yan
- XJTU-Oxford International Joint Laboratory for Catalysis, School of Chemical Engineering and Technology, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, China
| | - Guidong Yang
- XJTU-Oxford International Joint Laboratory for Catalysis, School of Chemical Engineering and Technology, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, China
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Singh R, Bhateria R. Core-shell nanostructures: a simplest two-component system with enhanced properties and multiple applications. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2021; 43:2459-2482. [PMID: 33161517 DOI: 10.1007/s10653-020-00766-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2019] [Accepted: 10/30/2020] [Indexed: 06/11/2023]
Abstract
With the pace of time, synthesis of nanomaterials has paved paths to blend two or more materials having different properties into hybrid nanoparticles. Therefore, it has become possible to combine two different functionalities in a single nanoparticle and their properties can be enhanced or modified by coupling of two different components. Core-shell technology has now represented a new trend in analytical sciences. Core-shell nanostructures are in demand due to their specific design and geometry. They have internal core of one component (metal or biomolecules) surrounded by a shell of another component. Core-shell nanoparticles have great importance due to their high thermal stability, high solubility and lower toxicity. In this review, recent progress in development of new and sophisticated core-shell nanostructures has been explored. The first section covers introduction throwing light on basics of core-shell nanoparticles. Following section classifies core-shell nanostructures into single core/shell, multicore/single shell, single core/multishell and multicore/multishell nanostructures. Next main section gives a brief description on types of core-shell nanomaterials followed by processes for the synthesis of core-shell nanostructures. Ultimately, the final section focuses on the application areas such as drug delivery, bioimaging, solar cell applications etc.
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Affiliation(s)
- Rimmy Singh
- Department of Environmental Sciences, MDU, Rohtak, India
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8
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Electrical properties of epoxy composites with carbon nanotubes, mixed with TiO2 or Fe particles. APPLIED NANOSCIENCE 2021. [DOI: 10.1007/s13204-021-01838-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Yin P, Tang Y, Zhang L, Wang J, Feng X, Dai J. Effect of nitric acid treatment on the final low-frequency microwave absorption performance of TiO2/ZnFe2O4/ZnTiO3 nanocomposite. APPLIED NANOSCIENCE 2021. [DOI: 10.1007/s13204-020-01639-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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10
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Li H, Hou Y, Li L. Tunable design of yolk-shell ZnFe2O4@C composites for enhancing electromagnetic wave absorption. POWDER TECHNOL 2021. [DOI: 10.1016/j.powtec.2020.09.025] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Bao S, Tang W, Song Z, Jiang Q, Jiang Z, Xie Z. Synthesis of sandwich-like Co 15Fe 85@C/RGO multicomponent composites with tunable electromagnetic parameters and microwave absorption performance. NANOSCALE 2020; 12:18790-18799. [PMID: 32970071 DOI: 10.1039/d0nr04615a] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Magnetic particle/carbon hybrid structures are promising candidates for high performance microwave absorbing materials with light weight and strong absorption. However, it remains a great challenge to balance the permittivity and permeability to realize impedance matching and further improve their absorption bandwidth. Herein, an effective strategy is designed to fabricate sandwich-like Co15Fe85@C/RGO composites. By introducing RGO sheets in the hybrid structures, the electromagnetic parameters, impedance matching and microwave absorption properties of the final materials can be well controlled. The optimized Co15Fe85@C/RGO composite shows an excellent microwave absorption performance, the strongest reflection loss (RL) of the sample is up to -33.38 dB at 10.72 GHz with a matching thickness of 2.5 mm, and the effective bandwidth (RL < -10 dB) can reach 9.2 GHz (8.64-17.84 GHz). With a single thickness, such a wide absorption band is rarely reported. Their excellent performance can be ascribed to the synergetic effect of the chemical composition and unique sandwich-like structures, which will improve impendence matching and strong microwave attenuation constants of the composites. Our results provide a facile strategy for tuning the electromagnetic parameters and microwave absorption properties of magnetic metal/carbon hybrid structures.
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Affiliation(s)
- Susu Bao
- State Key Laboratory of Physical Chemistry of Solid Surfaces, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
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Gopalan Sibi M, Verma D, Kim J. Magnetic core–shell nanocatalysts: promising versatile catalysts for organic and photocatalytic reactions. CATALYSIS REVIEWS 2020. [DOI: 10.1080/01614940.2019.1659555] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Malayil Gopalan Sibi
- SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Gyeong Gi-Do, Republic of Korea
- School of Mechanical Engineering, Sungkyunkwan University, Gyeong Gi-Do, Republic of Korea
- School of Chemical Engineering, Sungkyunkwan University, Gyeong Gi-Do, Republic of Korea
| | - Deepak Verma
- SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Gyeong Gi-Do, Republic of Korea
- School of Mechanical Engineering, Sungkyunkwan University, Gyeong Gi-Do, Republic of Korea
- School of Chemical Engineering, Sungkyunkwan University, Gyeong Gi-Do, Republic of Korea
| | - Jaehoon Kim
- SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Gyeong Gi-Do, Republic of Korea
- School of Mechanical Engineering, Sungkyunkwan University, Gyeong Gi-Do, Republic of Korea
- School of Chemical Engineering, Sungkyunkwan University, Gyeong Gi-Do, Republic of Korea
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Shi X, You W, Zhao Y, Li X, Shao Z, Che R. Multi-scale magnetic coupling of Fe@SiO 2@C-Ni yolk@triple-shell microspheres for broadband microwave absorption. NANOSCALE 2019; 11:17270-17276. [PMID: 31528905 DOI: 10.1039/c9nr06629b] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Magnetic core@shell and yolk@shell microspheres have received extensive attention; however, the realization of microwave performance enhancement remains a critical challenge for their actual applications. Herein, inspired by multi-scale magnetic coupling interactions, a synchronous in situ reduction process was developed to successfully fabricate Fe@SiO2@C-Ni (FSCN) yolk@triple-shell microspheres based on the Fe3O4@SiO2 substrate. Owing to the unique multi-scale magnetic coupling interactions in their delicate structure, (i) in each microsphere, abundant Ni NPs with optimized size could affect the density distribution and orientation of the magnetic stray field radiating from the Fe core, and (ii) via the coupling interactions between adjacent composite microspheres, the saturation magnetization was significantly enhanced to support strong magnetic loss capability. Moreover, the special yolk@multi-shell structure offered an optimized impedance balance, facilitating the propoagation of the incoming microwaves into the absorber. Both multiple interfacial polarization and synergistic effects from magnetic units (Fe and Ni) and dielectric shell (SiO2 and carbon) contributed to electromagnetic wave attenuation. The FSCN composite material exhibited excellent absorption performance with an intense reflection loss (-45.5 dB) and bandwidth absorption (8.2 GHz and 9.8-18 GHz) at the film thickness of only 2 mm. Our new findings provide important design implications for functional spheres and high-performance lightweight microwave absorbers.
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Affiliation(s)
- Xiaofeng Shi
- Laboratory of Advanced Materials, Department of Materials Science and Collaborative Innovation Center of Chemistry for Energy Materials (iChem), Fudan University, Shanghai 200438, P. R. China.
| | - Wenbin You
- Laboratory of Advanced Materials, Department of Materials Science and Collaborative Innovation Center of Chemistry for Energy Materials (iChem), Fudan University, Shanghai 200438, P. R. China.
| | - Yunhao Zhao
- Laboratory of Advanced Materials, Department of Materials Science and Collaborative Innovation Center of Chemistry for Energy Materials (iChem), Fudan University, Shanghai 200438, P. R. China.
| | - Xiao Li
- Laboratory of Advanced Materials, Department of Materials Science and Collaborative Innovation Center of Chemistry for Energy Materials (iChem), Fudan University, Shanghai 200438, P. R. China.
| | - Zhengzhong Shao
- Laboratory of Advanced Materials, Department of Materials Science and Collaborative Innovation Center of Chemistry for Energy Materials (iChem), Fudan University, Shanghai 200438, P. R. China.
| | - Renchao Che
- Laboratory of Advanced Materials, Department of Materials Science and Collaborative Innovation Center of Chemistry for Energy Materials (iChem), Fudan University, Shanghai 200438, P. R. China.
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Rohani S, Mohammadi Ziarani G, Badiei A. Pd embedded N, S co‐doped graphene wrapped core‐shell magnetic nanospheres: Engineered stable nanocatalyst for Suzuki couplings. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.5142] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Sahar Rohani
- Department of Chemistry, Faculty of ScienceUniversity of Alzahra Tehran Iran
| | | | - Alireza Badiei
- School of Chemistry, College of ScienceUniversity of Tehran Tehran Iran
- Nanobiomedicine Center of Excellence, Nanoscience and Nanotechnology Research CenterUniversity of Tehran Tehran Iran
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15
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Oladipo GO, Akinlabi AK, Alayande SO, Msagati TA, Nyoni HH, Ogunyinka OO. Synthesis, characterization, and photocatalytic activity of silver and zinc co-doped TiO2 nanoparticle for photodegradation of methyl orange dye in aqueous solution. CAN J CHEM 2019. [DOI: 10.1139/cjc-2018-0308] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In this study, TiO2 nanocrystals, 1 mol% Ag-doped TiO2, and 1 mol% Ag and 0.6 mol% Zn co-doped TiO2 powders were synthesized by the sol–gel route. Their photocatalytic activities on methyl orange dye under visible irradiation were investigated. The powders were characterized by X-ray diffraction (XRD), UV–visible spectroscopy (UV–vis), Brunauer–Emmett–Teller (BET), and Fourier transform infrared spectroscopy (FTIR). The XRD results revealed the presence of a rutile phase with an average crystallite size of 9 and 11 nm. The UV–vis spectra showed a red-shift towards a longer wavelength with the corresponding decrease in band gap from 2.9 to 2.5 eV. The BET surface areas of the nanoparticles ranged from 4.7 to 11.8 m2 g−1 with an average pore size between 18.9 and 56.6 nm. The Ag-doped TiO2 has the largest surface area of 11.8 m2 g−1, whereas the Ag–Zn co-doped TiO2 was found to have the highest pore size and volume. The absorption bands at 750–500 cm−1 were attributed to the –O–Ti–O– bond in the TiO2 lattice. The photocatalytic efficiency was highest at an optimum pH of 4.1 for Ag–Zn co-doped TiO2. The results confirmed that Ag-doped and Ag–Zn co-doped TiO2 were more effective than pure TiO2. The kinetic data were fitted into a pseudo first-order equation using a Langmuir–Hinshelwood kinetic model.
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Affiliation(s)
- Gabriel O. Oladipo
- Department of Chemistry, Federal University of Agriculture, Abeokuta, Ogun State, Nigeria
- Department of Science Laboratory Technology, D.S. Adegbenro ICT Polytechnic, Itori-Ewekoro, Ogun State, Nigeria
| | - Akinola K. Akinlabi
- Department of Chemistry, Federal University of Agriculture, Abeokuta, Ogun State, Nigeria
| | - Samson O. Alayande
- Department of Industrial Chemistry, First Technical University, Ibadan, Oyo State, Nigeria
| | - Titus A.M. Msagati
- Nanotechnology and Water Sustainability Research Unit, College of Science Engineering and Technology, University of South Africa, Florida, South Africa
| | - Hlengilizwe H. Nyoni
- Nanotechnology and Water Sustainability Research Unit, College of Science Engineering and Technology, University of South Africa, Florida, South Africa
| | - Opeyemi O. Ogunyinka
- Department of Science Laboratory Technology, D.S. Adegbenro ICT Polytechnic, Itori-Ewekoro, Ogun State, Nigeria
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Zhang Z, Lv Q, Chen Y, Yu H, Liu H, Cui G, Sun X, Li L. NiS 2@rGO Nanosheet Wrapped with PPy Aerogel: A Sandwich-Like Structured Composite for Excellent Microwave Absorption. NANOMATERIALS (BASEL, SWITZERLAND) 2019; 9:E833. [PMID: 31159349 PMCID: PMC6630302 DOI: 10.3390/nano9060833] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Revised: 05/22/2019] [Accepted: 05/24/2019] [Indexed: 11/18/2022]
Abstract
To reduce electromagnetic pollution as well as increase the accuracy of high-precision electronic equipment, more attention has been paid to new electromagnetic wave (EMW) absorbing materials, which have the advantages of strong absorption, wide absorption bands, and a narrow thickness. In this study, a novel ternary type of the NiS2@rGO/polypyrrole (PPy) sandwich-like structured composites was synthesized via a facile two-step method, in which the hydrothermal method was used to prepare NiS2@rGO binary composites and then the in situ polymerization method was used to synthesize the PPy, which acted as the outer layer of the sandwich-like structure. The morphologies and electromagnetic absorption performance of the NiS2@rGO/PPy were measured and investigated. A sample with 6 wt% NiS2@rGO/PPy loading paraffin-composite obtained an outstanding reflection loss (RL) of -58.7 dB at 16.44 GHz under a thickness of 2.03 mm. Simultaneously, the effective electromagnetic wave absorption bandwidth for RL < -10 dB, which covered 7.04 to 18.00 GHz (10.96 GHz), was achieved by changing the thickness of the absorber from 2.0 to 3.5 mm. The results not only suggest that the NiS2@rGO/PPy composite has excellent performance in the field of EMW absorption but also prove that the novel sandwich-like structure can contribute to appropriate impedance matching through multiple relaxation and interfacial polarization processes.
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Affiliation(s)
- Zhi Zhang
- Key Laboratory of Science and Technology on Electromagnetic Environmental Effects and Electro-optical Engineering, The Army Engineering University, Nanjing 210007, China.
| | - Qi Lv
- Key Laboratory of Science and Technology on Electromagnetic Environmental Effects and Electro-optical Engineering, The Army Engineering University, Nanjing 210007, China.
| | - Yiwang Chen
- Key Laboratory of Science and Technology on Electromagnetic Environmental Effects and Electro-optical Engineering, The Army Engineering University, Nanjing 210007, China.
| | - Haitao Yu
- Key Laboratory of Science and Technology on Electromagnetic Environmental Effects and Electro-optical Engineering, The Army Engineering University, Nanjing 210007, China.
| | - Hui Liu
- Key Laboratory of Science and Technology on Electromagnetic Environmental Effects and Electro-optical Engineering, The Army Engineering University, Nanjing 210007, China.
| | - Guangzhen Cui
- Key Laboratory of Science and Technology on Electromagnetic Environmental Effects and Electro-optical Engineering, The Army Engineering University, Nanjing 210007, China.
| | - Xiaodong Sun
- Key Laboratory of Science and Technology on Electromagnetic Environmental Effects and Electro-optical Engineering, The Army Engineering University, Nanjing 210007, China.
| | - Ling Li
- Key Laboratory of Science and Technology on Electromagnetic Environmental Effects and Electro-optical Engineering, The Army Engineering University, Nanjing 210007, China.
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Kim W, Park JY, Kim Y. Fabrication of branched-TiO2 microrods on the FTO glass for photocatalytic reduction of Cr(VI) under visible-light irradiation. J IND ENG CHEM 2019. [DOI: 10.1016/j.jiec.2019.01.032] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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18
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Zhang Z, Lv X, Chen Y, Zhang P, Sui M, Liu H, Sun X. NiS₂@MoS₂ Nanospheres Anchored on Reduced Graphene Oxide: A Novel Ternary Heterostructure with Enhanced Electromagnetic Absorption Property. NANOMATERIALS (BASEL, SWITZERLAND) 2019; 9:E292. [PMID: 30791422 PMCID: PMC6410035 DOI: 10.3390/nano9020292] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Revised: 02/12/2019] [Accepted: 02/15/2019] [Indexed: 11/29/2022]
Abstract
For the purposes of strength, military equipment camouflage, and protecting the health of organisms, electromagnetic wave absorbing materials have received a lot of attention and are widely studied. In addition to having a strong absorption intensity and a wide effective absorption bandwidth, materials that are lightweight, thermally stable, and antioxidative are also highly desirable. In this study, we fabricated core⁻shell structured NiS₂@MoS₂ nanospheres anchored on reduced graphene oxide (rGO) nanosheets (NiS₂@MoS₂/rGO) by a simple two-step hydrothermal method. The combination ratio was adjusted to achieve proper impedance matching. The electromagnetic parameters and the absorption performance were investigated in detail. A composite loaded with 30 wt.% of the sample achieved a minimum reflection loss (RL) value of -29.75 dB and the effective bandwidth (RL value of less than -10 dB) ranged from 4.95 GHz to 18.00 GHz (13.05 GHz), with a thickness ranging from 1.5 mm to 4.0 mm. This study proved that the generated significant interfacial polarization and synergetic interaction between components can result in NiS₂@MoS₂/rGO composites with enhanced electromagnetic absorption performance.
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Affiliation(s)
- Zhi Zhang
- Key Laboratory of Science and Technology on Electromagnetic Environmental Effects and Electro-optical Engineering, The Army Engineering University, Nanjing 210007, China.
| | - Xuliang Lv
- Key Laboratory of Science and Technology on Electromagnetic Environmental Effects and Electro-optical Engineering, The Army Engineering University, Nanjing 210007, China.
| | - Yiwang Chen
- Key Laboratory of Science and Technology on Electromagnetic Environmental Effects and Electro-optical Engineering, The Army Engineering University, Nanjing 210007, China.
| | - Pin Zhang
- Key Laboratory of Science and Technology on Electromagnetic Environmental Effects and Electro-optical Engineering, The Army Engineering University, Nanjing 210007, China.
| | - Mingxu Sui
- Key Laboratory of Science and Technology on Electromagnetic Environmental Effects and Electro-optical Engineering, The Army Engineering University, Nanjing 210007, China.
| | - Hui Liu
- Key Laboratory of Science and Technology on Electromagnetic Environmental Effects and Electro-optical Engineering, The Army Engineering University, Nanjing 210007, China.
| | - Xiaodong Sun
- Key Laboratory of Science and Technology on Electromagnetic Environmental Effects and Electro-optical Engineering, The Army Engineering University, Nanjing 210007, China.
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Ghasemzadeh MS, Akhlaghinia B. C–P bond construction catalyzed by NiII immobilized on aminated Fe3O4@TiO2 yolk–shell NPs functionalized by (3-glycidyloxypropyl)trimethoxysilane (Fe3O4@TiO2 YS-GLYMO-UNNiII) in green media. NEW J CHEM 2019. [DOI: 10.1039/c9nj00352e] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
An efficient, versatile and novel method for the C–P cross-coupling reaction with a high yield of products using Fe3O4@TiO2YS-GLYMO-UNNiII as a magnetic nanostructured catalyst in the presence of WERSA was reported.
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Affiliation(s)
- Maryam Sadat Ghasemzadeh
- Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad
- Mashhad 9177948974
- Iran
| | - Batool Akhlaghinia
- Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad
- Mashhad 9177948974
- Iran
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Lu M, Wu Q, Guan XH, Xu W, Zhang HY, Di X, Wang GS, Dong SH. Synthesis and Microwave Absorbing Properties of Porous One-Dimensional Nickel Sulfide Nanostructures. Front Chem 2018; 6:405. [PMID: 30364278 PMCID: PMC6193059 DOI: 10.3389/fchem.2018.00405] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Accepted: 08/20/2018] [Indexed: 11/15/2022] Open
Abstract
One-dimensional (1D) porous NixSy nanostructures have been successfully fabricated by two-step method consisting of solvothermal and subsequent annealing process. The suitable heat treatment temperature and reaction time play crucial roles in the final structure, morphology, as well as performance. The uniform and perfect porous NixSy nanostructures obtained at 310°C exhibit outstanding microwave absorption performances. A minimum reflection loss of -35.6 dB is achieved at 8.5 GHz, and the effective absorption bandwidth almost covers 14.5 GHz with the absorber thickness range of 2.0-5.0 mm. It can be supposed that this porous structure with rough surface which is favor for increasing the microwave multiple reflection and scattering, contributes a high-performance electromagnetic absorption.
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Affiliation(s)
- Min Lu
- School of Chemical Engineering, Northeast Electric Power University, Jilin, China
| | - Qian Wu
- School of Chemical Engineering, Northeast Electric Power University, Jilin, China
| | - Xiao-Hui Guan
- School of Chemical Engineering, Northeast Electric Power University, Jilin, China
| | - Wei Xu
- School of Chemistry, Beihang University, Beijing, China
| | - Hao-Yue Zhang
- School of Chemistry, Beihang University, Beijing, China
| | - Xin Di
- Pipeline Technology Research Center, China University of Petroleum–Beijing, Beijing, China
| | | | - Shao-Hua Dong
- Pipeline Technology Research Center, China University of Petroleum–Beijing, Beijing, China
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21
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Zhu N, Ji H, Yu P, Niu J, Farooq MU, Akram MW, Udego IO, Li H, Niu X. Surface Modification of Magnetic Iron Oxide Nanoparticles. NANOMATERIALS (BASEL, SWITZERLAND) 2018; 8:E810. [PMID: 30304823 PMCID: PMC6215286 DOI: 10.3390/nano8100810] [Citation(s) in RCA: 214] [Impact Index Per Article: 35.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 09/26/2018] [Accepted: 10/05/2018] [Indexed: 12/11/2022]
Abstract
Functionalized iron oxide nanoparticles (IONPs) are of great interest due to wide range applications, especially in nanomedicine. However, they face challenges preventing their further applications such as rapid agglomeration, oxidation, etc. Appropriate surface modification of IONPs can conquer these barriers with improved physicochemical properties. This review summarizes recent advances in the surface modification of IONPs with small organic molecules, polymers and inorganic materials. The preparation methods, mechanisms and applications of surface-modified IONPs with different materials are discussed. Finally, the technical barriers of IONPs and their limitations in practical applications are pointed out, and the development trends and prospects are discussed.
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Affiliation(s)
- Nan Zhu
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610054, China.
| | - Haining Ji
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610054, China.
| | - Peng Yu
- Institute of Fundamental and Frontier Science, University of Electronic Science and Technology, Chengdu 610054, China.
| | - Jiaqi Niu
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610054, China.
| | - M U Farooq
- Institute of Fundamental and Frontier Science, University of Electronic Science and Technology, Chengdu 610054, China.
| | - M Waseem Akram
- Institute of Fundamental and Frontier Science, University of Electronic Science and Technology, Chengdu 610054, China.
| | - I O Udego
- Institute of Fundamental and Frontier Science, University of Electronic Science and Technology, Chengdu 610054, China.
| | - Handong Li
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610054, China.
| | - Xiaobin Niu
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610054, China.
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22
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Wang YF, Yang TT, Liu WL, Zhao D, Ren MM, Kong FG, Wang SJ, Wang XQ, Duan XL. Design of double-shelled and dual-cavity structures in Fe3O4@Void@PMAA@Void@TiO2 nanocomposite particles for comprehensive photocatalyst and adsorbent applications. Colloid Polym Sci 2018. [DOI: 10.1007/s00396-018-4390-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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23
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Zhao H, Cheng Y, Liu W, Yang Z, Zhang B, Ji G, Du Y. The flaky porous Fe 3O 4 with tunable dimensions for enhanced microwave absorption performance in X and C bands. NANOTECHNOLOGY 2018; 29:295603. [PMID: 29701607 DOI: 10.1088/1361-6528/aac0de] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Special electric and magnetic characteristics make Fe3O4 widely applied in the electromagnetic (EM) wave absorption region. However, for pure Fe3O4, it is still a challenge to simultaneously obtain high absorption intensity and broadband absorption at a low thickness, owing to its low dielectric property. As we realized, flake configuration and the porous structure have obviously promote the EM wave absorption property. Because the former can lead to multi-reflection between flakes and the latter is conductive to interface polarization, flaky Fe3O4 with a porous and coarse surface was designed to overcome the deficiency of traditional Fe3O4 particles. The experimental results demonstrate that the flaky configuration is conductive to enhancing the dielectric coefficient and optimizing impedance matching. Moreover, the complex permittivity rises with the aspect ratio of the sheet. Under a suitable dimension, the flaky Fe3O4 could acquire targeted EM wave absorption capacity in the X band (8-12 GHz). In detail, the maximum reflection loss (RL) could reach a strong intensity of -49 dB at 2.05 mm. The effective absorption bandwidth (EAB) with RL below -10 dB is 4.32 (7.52-11.84) GHz, which is almost equivalent to the whole X band (8-12 GHz). Even more exciting, when regulating the thickness between 2.05 and 3.05 mm, the EAB could cover the entire C and X bands (4-12 GHz). This study provides a good reference for the future development of other ferromagnetic materials toward specific microwave bands.
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Affiliation(s)
- Huanqin Zhao
- College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, People's Republic of China
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24
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You W, Che R. Excellent NiO-Ni Nanoplate Microwave Absorber via Pinning Effect of Antiferromagnetic-Ferromagnetic Interface. ACS APPLIED MATERIALS & INTERFACES 2018; 10:15104-15111. [PMID: 29649867 DOI: 10.1021/acsami.8b03610] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Materials with strong magnetic property that can provide excellent microwave absorption performance are highly desirable, especially if their dielectric and magnetic properties can be easily modulated, which make minimal thickness and ultrawide bandwidth become achievable. The magnetic properties of ferromagnetic (FM) and antiferromagnetic (AFM) composite materials are closely related to their ratio of composition, size, morphology, and structure. AFM-FM composites have become a popular alternative for microwave absorption; however, the controllable design and preparation need to be urgently optimized. Here, we have successfully prepared a series of platelike NiO-Ni composites and demonstrated the potential of such composites for microwave absorption. Strong magnetic coupling was found from NiO-Ni nanoparticles by electron holography, which makes NiO-Ni composites a highly efficient microwave absorber (strong reflection loss: -61.5 dB and broad bandwidth: 11.2 GHz, reflection loss < -10 dB). Our findings are helpful to develop a strong microwave absorber based on magnetic coupling.
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Affiliation(s)
- Wenbin You
- Laboratory of Advanced Materials, Department of Materials Science, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM) , Fudan University , 220 Handan Road , Shanghai 200433 , China
| | - Renchao Che
- Laboratory of Advanced Materials, Department of Materials Science, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM) , Fudan University , 220 Handan Road , Shanghai 200433 , China
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25
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Mahmoodi V, Bastami TR, Ahmadpour A. Solar energy harvesting by magnetic-semiconductor nanoheterostructure in water treatment technology. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:8268-8285. [PMID: 29372526 DOI: 10.1007/s11356-018-1224-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Accepted: 01/04/2018] [Indexed: 06/07/2023]
Abstract
Photocatalytic degradation of toxic organic pollutants in the wastewater using dispersed semiconductor nanophotocatalysts has a number of advantages such as high activity, cost effectiveness, and utilization of free solar energy. However, it is difficult to recover and recycle nanophotocatalysts since the fine dispersed nanoparticles are easily suspended in waters. Furthermore, a large amount of photocatalysts will lead to color contamination. Thus, it is necessary to prepare photocatalysts with easy separation for the reusable application. To take advantage of high photocatalysis activity and reusability, magnetic photocatalysts with separation function were utilized. In this review, the photocatalytic principle, structure, and application of the magnetic-semiconductor nanoheterostructure photocatalysts under solar light are evaluated. Graphical abstract ᅟ.
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Affiliation(s)
- Vahid Mahmoodi
- Department of Chemical Engineering, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Tahereh Rohani Bastami
- Department of Chemical Engineering, Faculty of Engineering, Quchan University of Technology, P.O. Box 94771-67335, Quchan, Iran
| | - Ali Ahmadpour
- Department of Chemical Engineering, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, Iran.
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26
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Chen C, Liu Q, Bi H, You W, She W, Che R. Fabrication of hierarchical TiO 2 coated Co 20Ni 80 particles with tunable core sizes as high-performance wide-band microwave absorbers. Phys Chem Chem Phys 2018; 18:26712-26718. [PMID: 27722536 DOI: 10.1039/c6cp04081k] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Multifunctional composite microspheres with a Co20Ni80 core and anatase TiO2 shells (Co20Ni80@TiO2) are synthesized by combining a solvothermal reaction and a calcination process, and include a series of microspheres with different core sizes (100 nm, 500 nm and 1 μm). The mechanism of self-assembly of the primary particles has been effective in both the fabrication of the core and the process of coating. The obtained core-shell particles possess superior monodispersity, size uniformity, and tailored core sizes, and are characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Furthermore, the electromagnetic shielding performance of the microspheres is investigated in terms of the theory of transmission lines. The Co20Ni80@TiO2 core-shell particle (CoNi@TiO2) with a well-defined core size of 500 nm demonstrates a remarkable wide-band electromagnetic shielding performance of up to 6.2 GHz (10.0-16.2 GHz, <-10 dB) within 2-18 GHz, which is due to the tunable multi-component hierarchical structure of the particles and contributes to the complex permittivity and permeability and the multiple scattering loss of the microwave. The Co20Ni80@TiO2 particle with a specific core size (500 nm) is a promising candidate for the wide-band electromagnetic shielding materials, gathering increasing interest from researchers.
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Affiliation(s)
- Chen Chen
- Laboratory of Advanced Materials, Department of Materials Science, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200438, People's Republic of China.
| | - Qinghe Liu
- Laboratory of Advanced Materials, Department of Materials Science, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200438, People's Republic of China.
| | - Han Bi
- Laboratory of Advanced Materials, Department of Materials Science, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200438, People's Republic of China.
| | - Wenbin You
- Laboratory of Advanced Materials, Department of Materials Science, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200438, People's Republic of China.
| | - Wen She
- Laboratory of Advanced Materials, Department of Materials Science, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200438, People's Republic of China.
| | - Renchao Che
- Laboratory of Advanced Materials, Department of Materials Science, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200438, People's Republic of China.
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27
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Abstract
Linseed oil is a cheap, biodegradable, and nontoxic vegetable oil with antimicrobial properties, which has recently attained a lot of interest for the manufacturing of coatings, surfactants, soaps cosmetic products, lubricants, and so forth. Titanium dioxide (TiO2) is an important semiconductor material frequently employed in foods, cosmetics, paints, coatings, food packaging materials, optical devices, and particularly, antimicrobials due to its strong photocatalytic disinfection ability. This chapter describes the preparation and characterization of acrylated epoxidized linseed oil nanocomposite coatings reinforced with TiO2 nanoparticles. The effect of TiO2 loading on the morphology, barrier, thermal, mechanical, tribological, and antibacterial performance of the coatings is summarized. The coatings exhibit antimicrobial activity against gram-negative Escherichia coli and gram-positive Staphylococcus aureus bacteria even in the absence of UV light, and the bactericidal effect increases with the TiO2 loading. These nanocomposite coatings could be used to prevent microbial proliferation in public places with high risk of infections such as hospitals.
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28
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Yu M, Wang L, Yang P, Fu J. Preparation and high-performance microwave absorption of hierarchical dendrite-like Co superstructures self-assembly of nanoflakes. NANOTECHNOLOGY 2017; 28:485703. [PMID: 28967865 DOI: 10.1088/1361-6528/aa9045] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Dendritic-like Co superstructures based on the self-assembly of nanoflakes that could efficiently suppress the eddy current were successfully synthesized via a facile, rapid, and energy-saving chemical reduction method. Since crystal structure, size, and special geometrical morphology, magnetism have a vital influence on microwave absorption properties, the as-obtained products were characterized by x-ray diffraction, scanning electron microscopy, vibrating sample magnetometry, and vector network analysis. The prepared dendritic Co possesses abundant secondary branches that extend to the 3D space. Their dimensions, spacing, sheet-like blocks, and high-ordering microstructures all contribute to the penetration, scattering, and attenuation of EM waves. The composites present attractive microwave absorption performances in the X band, as well as in the whole S band (2-4 GHz). This work investigates the mechanism of absorption for the as-obtained Co, offers a promising strategy for the fabrication of hierarchical Co microstructure assemblies by multi-leaf flakes and introduces the application of dendritic-like Co as a highly efficient absorber in the S band and X band.
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Affiliation(s)
- Miao Yu
- Key Lab for Optoelectronic Technology and Systems, Ministry of Education, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, People's Republic of China
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29
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Zhang XJ, Wang SW, Wang GS, Li Z, Guo AP, Zhu JQ, Liu DP, Yin PG. Facile synthesis of NiS2@MoS2 core–shell nanospheres for effective enhancement in microwave absorption. RSC Adv 2017. [DOI: 10.1039/c7ra03260a] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Core–shell structural NiS2@MoS2 nanospheres have been successfully fabricated and they possess enhanced microwave absorption properties as compared to single NiS2 nanospheres or MoS2 nanoplates due to this core–shell structure.
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Affiliation(s)
- Xiao-Juan Zhang
- School of Chemistry and Environment
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education
- Beihang University
- Beijing 100191
- P. R. China
| | - Shan-Wen Wang
- School of Chemistry and Environment
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education
- Beihang University
- Beijing 100191
- P. R. China
| | - Guang-Sheng Wang
- School of Chemistry and Environment
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education
- Beihang University
- Beijing 100191
- P. R. China
| | - Zhen Li
- Changjiang River Scientific Research Institute of Changjiang Water Resources Commission
- Wuhan
- P. R. China
| | - Ao-Ping Guo
- School of Chemistry and Environment
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education
- Beihang University
- Beijing 100191
- P. R. China
| | - Jia-Qiang Zhu
- School of Chemistry and Environment
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education
- Beihang University
- Beijing 100191
- P. R. China
| | - Da-Peng Liu
- School of Chemistry and Environment
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education
- Beihang University
- Beijing 100191
- P. R. China
| | - Peng-Gang Yin
- School of Chemistry and Environment
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education
- Beihang University
- Beijing 100191
- P. R. China
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30
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Zhao B, Ma C, Liang L, Guo W, Fan B, Guo X, Zhang R. An impedance match method used to tune the electromagnetic wave absorption properties of hierarchical ZnO assembled by porous nanosheets. CrystEngComm 2017. [DOI: 10.1039/c7ce00883j] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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31
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Liao B, An Z, Zhang J. Highly efficient large-scale preparation and electromagnetic property control of silica–NiFeP double shell composite hollow particles. RSC Adv 2017. [DOI: 10.1039/c7ra02710a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Micron-sized double shell composite hollow particles with excellent electromagnetic behavior are prepared using a highly efficient and large scale method.
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Affiliation(s)
- Bin Liao
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
- University of Chinese Academy of Sciences
| | - Zhenguo An
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Jingjie Zhang
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
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32
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Zhao B, Deng J, Liang L, Zuo C, Bai Z, Guo X, Zhang R. Lightweight porous Co3O4 and Co/CoO nanofibers with tunable impedance match and configuration-dependent microwave absorption properties. CrystEngComm 2017. [DOI: 10.1039/c7ce01464c] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
In this study, we fabricated one-dimensional porous Co3O4 and Co/CoO nanofibers by calcination of cobalt(ii) oxalate dehydrate precursors in an environment filled with air and N2, respectively.
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Affiliation(s)
- Biao Zhao
- Henan Key Laboratory of Aeronautical Materials and Application Technology
- School of Mechatronics Engineering
- Zhengzhou University of Aeronautics
- Zhengzhou
- China
| | - Jiushuai Deng
- State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization
- Faculty of Land Resource Engineering
- Kunming University of Science and Technology
- Kunming 650093
- China
| | - Luyang Liang
- Henan Key Laboratory of Aeronautical Materials and Application Technology
- School of Mechatronics Engineering
- Zhengzhou University of Aeronautics
- Zhengzhou
- China
| | - Chenyinxia Zuo
- Department of Mechanical and Industrial Engineering
- University of Toronto
- Toronto
- Canada
| | - Zhongyi Bai
- Henan Key Laboratory of Aeronautical Materials and Application Technology
- School of Mechatronics Engineering
- Zhengzhou University of Aeronautics
- Zhengzhou
- China
| | - Xiaoqin Guo
- Henan Key Laboratory of Aeronautical Materials and Application Technology
- School of Mechatronics Engineering
- Zhengzhou University of Aeronautics
- Zhengzhou
- China
| | - Rui Zhang
- Henan Key Laboratory of Aeronautical Materials and Application Technology
- School of Mechatronics Engineering
- Zhengzhou University of Aeronautics
- Zhengzhou
- China
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33
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Wu W, Jiang CZ, Roy VAL. Designed synthesis and surface engineering strategies of magnetic iron oxide nanoparticles for biomedical applications. NANOSCALE 2016; 8:19421-19474. [PMID: 27812592 DOI: 10.1039/c6nr07542h] [Citation(s) in RCA: 180] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Iron oxide nanoparticles (NPs) hold great promise for future biomedical applications because of their magnetic properties as well as other intrinsic properties such as low toxicity, colloidal stability, and surface engineering capability. Numerous related studies on iron oxide NPs have been conducted. Recent progress in nanochemistry has enabled fine control over the size, crystallinity, uniformity, and surface properties of iron oxide NPs. This review examines various synthetic approaches and surface engineering strategies for preparing naked and functional iron oxide NPs with different physicochemical properties. Growing interest in designed and surface-engineered iron oxide NPs with multifunctionalities was explored in in vitro/in vivo biomedical applications, focusing on their combined roles in bioseparation, as a biosensor, targeted-drug delivery, MR contrast agents, and magnetic fluid hyperthermia. This review outlines the limitations of extant surface engineering strategies and several developing strategies that may overcome these limitations. This study also details the promising future directions of this active research field.
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Affiliation(s)
- Wei Wu
- Laboratory of Printable Functional Nanomaterials and Printed Electronics, School of Printing and Packaging, Wuhan University, Wuhan 430072, P. R. China. and Department of Physics and Materials Science, City University of Hong Kong, Hong Kong SAR, P. R. China.
| | - Chang Zhong Jiang
- School of Physics and Technology, Wuhan University, Wuhan 430072, P. R. China.
| | - Vellaisamy A L Roy
- Department of Physics and Materials Science, City University of Hong Kong, Hong Kong SAR, P. R. China.
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34
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Lv G, Xing X, Wu L, Jiang WT, Li Z, Liao L. Tunable high-performance microwave absorption for manganese dioxides by one-step Co doping modification. Sci Rep 2016; 6:37400. [PMID: 27853275 PMCID: PMC5112597 DOI: 10.1038/srep37400] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Accepted: 10/25/2016] [Indexed: 01/22/2023] Open
Abstract
The frequencies of microwave absorption can be affected by the permanent electric dipole moment which could be adjusted by modifying the crystal symmetry of the microwave absorbing materials. Herein, we corroborate this strategy experimentally and computationally to the microwave absorption of manganese dioxides. Nanosized Co-doped cryptomelane (Co-Cryp) was successfully synthesized by a one-step reaction. The introduction of Co(III) induced a change of crystal symmetry from tetragonal to monlclinic, which could lead to an increase of its permanent electric dipole moment. As a result, the frequencies of maximum microwave absorption were regulated in the range of 7.4 to 13.9 GHz with a broadened bandwidths. The results suggested that microwave absorption of manganese dioxides can be tailored with Co doping to expand their potential uses for abatement of various microwave pollutions.
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Affiliation(s)
- Guocheng Lv
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, PR China
| | - Xuebing Xing
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, PR China
| | - Limei Wu
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, PR China
| | - Wei-Teh Jiang
- Department of Earth Sciences, National Cheng Kung University, Tainan, 70101, Taiwan
| | - Zhaohui Li
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, PR China.,Department of Earth Sciences, National Cheng Kung University, Tainan, 70101, Taiwan.,Geosciences Department, University of Wisconsin - Parkside, Kenosha, WI 53144, USA
| | - Libing Liao
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, PR China
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35
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Zhao B, Guo X, Zhao W, Deng J, Shao G, Fan B, Bai Z, Zhang R. Yolk-Shell Ni@SnO 2 Composites with a Designable Interspace To Improve the Electromagnetic Wave Absorption Properties. ACS APPLIED MATERIALS & INTERFACES 2016; 8:28917-28925. [PMID: 27700044 DOI: 10.1021/acsami.6b10886] [Citation(s) in RCA: 100] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
In this study, yolk-shell Ni@SnO2 composites with a designable interspace were successfully prepared by the simple acid etching hydrothermal method. The Ni@void@SnO2 composites were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy, and transmission electron microscopy. The results indicate that interspaces exist between the Ni cores and SnO2 shells. Moreover, the void can be adjusted by controlling the hydrothermal reaction time. The unique yolk-shell Ni@void@SnO2 composites show outstanding electromagnetic wave absorption properties. A minimum reflection loss (RLmin) of -50.2 dB was obtained at 17.4 GHz with absorber thickness of 1.5 mm. In addition, considering the absorber thickness, minimal reflection loss, and effective bandwidth, a novel method to judge the effective microwave absorption properties is proposed. On the basis of this method, the best microwave absorption properties were obtained with a 1.7 mm thick absorber layer (RLmin= -29.7 dB, bandwidth of 4.8 GHz). The outstanding electromagnetic wave absorption properties stem from the unique yolk-shell structure. These yolk-shell structures can tune the dielectric properties of the Ni@air@SnO2 composite to achieve good impedance matching. Moreover, the designable interspace can induce interfacial polarization, multiple reflections, and microwave plasma.
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Affiliation(s)
- Biao Zhao
- Provincial Key Laboratory of Aviation Materials and Application Technology, Zhengzhou University of Aeronautics , Zhengzhou, Henan 450046, China
- School of Mechatronics Engineering, Zhengzhou University of Aeronautics , Zhengzhou, Henan 450046, China
| | - Xiaoqin Guo
- Provincial Key Laboratory of Aviation Materials and Application Technology, Zhengzhou University of Aeronautics , Zhengzhou, Henan 450046, China
- School of Mechatronics Engineering, Zhengzhou University of Aeronautics , Zhengzhou, Henan 450046, China
| | - Wanyu Zhao
- School of Materials Science and Engineering, Zhengzhou University , Zhengzhou, Henan 450001, China
| | - Jiushuai Deng
- State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Faculty of Land Resource Engineering, Kunming University of Science and Technology , Kunming, Yunnan 650093, China
| | - Gang Shao
- School of Materials Science and Engineering, Zhengzhou University , Zhengzhou, Henan 450001, China
| | - Bingbing Fan
- School of Materials Science and Engineering, Zhengzhou University , Zhengzhou, Henan 450001, China
| | - Zhongyi Bai
- Provincial Key Laboratory of Aviation Materials and Application Technology, Zhengzhou University of Aeronautics , Zhengzhou, Henan 450046, China
- School of Mechatronics Engineering, Zhengzhou University of Aeronautics , Zhengzhou, Henan 450046, China
| | - Rui Zhang
- Provincial Key Laboratory of Aviation Materials and Application Technology, Zhengzhou University of Aeronautics , Zhengzhou, Henan 450046, China
- School of Materials Science and Engineering, Zhengzhou University , Zhengzhou, Henan 450001, China
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36
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Mino Y, Ogawa D, Matsuyama H. Functional magnetic particles providing osmotic pressure as reusable draw solutes in forward osmosis membrane process. ADV POWDER TECHNOL 2016. [DOI: 10.1016/j.apt.2016.08.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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37
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Liu X, Lv Y, Zhuang Q, Li Y, Zhang S, Lan F. Polybenzobisoxazoles-based nanocomposites with high microwave absorption performance and excellent thermal stability. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.06.057] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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38
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Enhanced high-frequency absorption of anisotropic Fe3O4/graphene nanocomposites. Sci Rep 2016; 6:25075. [PMID: 27142260 PMCID: PMC4855222 DOI: 10.1038/srep25075] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Accepted: 04/08/2016] [Indexed: 11/25/2022] Open
Abstract
Anisotropic Fe3O4 nanoparticle and a series of its graphene composites have been successfully prepared as high-frequency absorbers. The crystal structure, morphology and magnetic property of the samples were detailed characterized through X-ray diffractometer (XRD), transmission electron microscopy (TEM) and vibrating sample magnetometer (VSM). The high-frequency absorbing performance of the composites is evaluated within 2.0–18.0 GHz. Combining reduced graphene oxide (RGO) to Fe3O4 helps to adjust the permittivity and permeability of the composite, balance the dielectric loss and magnetic loss, consequently improve the absorbing performance in view of the impedance matching characteristic. The optimal reflection loss of the pure Fe3O4 sample reaches −38.1 dB with a thickness of 1.7 mm, and it increases to −65.1 dB for the sample grafted with 3 wt.% RGO. The addition of proper content of RGO both improves the reflection loss and expands the absorbing bandwidth. This work not only opens a new method and an idea for tuning the electromagnetic properties and enhancing the capacity of high-efficient absorbers, but also broadens the application of such kinds of lightweight absorbing materials frameworks.
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39
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Zhao Y, Tao C, Xiao G, Wei G, Li L, Liu C, Su H. Controlled synthesis and photocatalysis of sea urchin-like Fe3O4@TiO2@Ag nanocomposites. NANOSCALE 2016; 8:5313-26. [PMID: 26884248 DOI: 10.1039/c5nr08624h] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Based on the synergistic photocatalytic activities of nano-sized TiO2 and Ag, as well as the magnetic properties of Fe3O4, a sea urchin-like Fe3O4@TiO2@Ag nanocomposite (Fe3O4@TiO2@Ag NCs) is controllably synthesized with tunable cavity size, adjustable shell layer of TiO2 nanofiber, higher structural stability and larger specific surface area. Here, Fe3O4@TiO2@Ag NCs are obtained with Fe3O4 as the core and nanofiber TiO2/Fe3O4/Ag nanoheterojunctions as the shell; and Ag nanoparticles with diameter of approximately 4 nm are loaded both on TiO2 nanofibers and inside the cavities of sea urchin-like Fe3O4@TiO2 nanocomposites uniformly. Ag nanoparticles lead to the production of more photogenerated charges in the TiO2/Fe3O4/Ag heterojunction via LSPR absorption, and enhance the band-gap absorption of TiO2, while the Fe3O4 cocatalyst provides the active sites for oxygen reduction by the effective transfer of photogenerated electrons to oxygen. So the photocatalytic performance is improved due to the synergistic effect of TiO2/Fe3O4/Ag nanoheterojunctions. As photocatalysts under UV and visible irradiation, the as-synthesized nanocomposites display enhanced photocatalytic and recycling properties for the degradation of ampicillin. Moreover, they present better broad-spectrum antibiosis under visible irradiation. The enhanced photocatalytic activity and excellent chemical stability, in combination with the magnetic recyclability, makes this multifunctional nanostructure a promising candidate for antibiosis and remediation in aquatic environmental contamination in the future.
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Affiliation(s)
- Yilin Zhao
- Beijing Key Laboratory of Bioprocess, Beijing University of Chemical Technology (BUCT), 15 BeiSanhuan East Road, ChaoYang District, Beijing, 100029, P. R. China.
| | - Chengran Tao
- Beijing Key Laboratory of Bioprocess, Beijing University of Chemical Technology (BUCT), 15 BeiSanhuan East Road, ChaoYang District, Beijing, 100029, P. R. China.
| | - Gang Xiao
- Beijing Key Laboratory of Bioprocess, Beijing University of Chemical Technology (BUCT), 15 BeiSanhuan East Road, ChaoYang District, Beijing, 100029, P. R. China.
| | - Guipeng Wei
- Beijing Key Laboratory of Bioprocess, Beijing University of Chemical Technology (BUCT), 15 BeiSanhuan East Road, ChaoYang District, Beijing, 100029, P. R. China.
| | - Linghui Li
- Beijing Key Laboratory of Bioprocess, Beijing University of Chemical Technology (BUCT), 15 BeiSanhuan East Road, ChaoYang District, Beijing, 100029, P. R. China.
| | - Changxia Liu
- Beijing Key Laboratory of Bioprocess, Beijing University of Chemical Technology (BUCT), 15 BeiSanhuan East Road, ChaoYang District, Beijing, 100029, P. R. China.
| | - Haijia Su
- Beijing Key Laboratory of Bioprocess, Beijing University of Chemical Technology (BUCT), 15 BeiSanhuan East Road, ChaoYang District, Beijing, 100029, P. R. China.
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40
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An Z, Zhang J. Facile large scale preparation and electromagnetic properties of silica–nickel–carbon composite shelly hollow microspheres. Dalton Trans 2016; 45:2881-7. [DOI: 10.1039/c5dt04702a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Silica–nickel–carbon composite microspheres with shelly hollow structures and tunable electromagnetic properties were prepared in large scale through a three-step route.
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Affiliation(s)
- Zhenguo An
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Jingjie Zhang
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
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41
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Zhao B, Hardiman M, Ryan KM, O'Reilly E, McCarthy C. Formation of reworkable nanocomposite adhesives by dielectric heating of epoxy resin embedded Fe3O4hollow spheres. CrystEngComm 2016. [DOI: 10.1039/c6ce01359g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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42
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Wei Y, Li X, Elzatahry AA, Zhang R, Wang W, Tang X, Yang J, Wang J, Al-Dahyan D, Zhao D. A versatile in situ etching-growth strategy for synthesis of yolk–shell structured periodic mesoporous organosilica nanocomposites. RSC Adv 2016. [DOI: 10.1039/c6ra08541e] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A versatile “in situetching-growth” strategy has been proposed to synthesize mesoporous composites with yolk–shell structure and controlled PMO shell, by combing the etching process with the shell growth.
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43
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Purbia R, Paria S. Yolk/shell nanoparticles: classifications, synthesis, properties, and applications. NANOSCALE 2015; 7:19789-873. [PMID: 26567966 DOI: 10.1039/c5nr04729c] [Citation(s) in RCA: 137] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Core/shell nanoparticles were first reported in the early 1990s with a simple spherical core and shell structure, but the area is gradually diversifying in multiple directions such as different shapes, multishells, yolk/shell etc., because of the development of different new properties of the materials, which are useful for several advanced applications. Among different sub-areas of core/shell nanoparticles, yolk/shell nanoparticles (YS NPs) have drawn significant attention in recent years because of their unique properties such as low density, large surface area, ease of interior core functionalization, a good molecular loading capacity in the void space, tunable interstitial void space, and a hollow outer shell. The YS NPs have better properties over simple core/shell or hollow NPs in various fields including biomedical, catalysis, sensors, lithium batteries, adsorbents, DSSCs, microwave absorbers etc., mainly because of the presence of free void space, porous hollow shell, and free core surface. This review presents an extensive classification of YS NPs based on their structures and types of materials, along with synthesis strategies, properties, and applications with which one would be able to draw a complete picture of this area.
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Affiliation(s)
- Rahul Purbia
- Interfaces and Nanomaterials Laboratory, Department of Chemical Engineering, National Institute of Technology, Rourkela-769008, India.
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44
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Tian J, Leng Y, Cui H, Liu H. Hydrogenated TiO2 nanobelts as highly efficient photocatalytic organic dye degradation and hydrogen evolution photocatalyst. JOURNAL OF HAZARDOUS MATERIALS 2015; 299:165-73. [PMID: 26118828 DOI: 10.1016/j.jhazmat.2015.06.019] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2015] [Revised: 06/07/2015] [Accepted: 06/09/2015] [Indexed: 05/20/2023]
Abstract
TiO2 nanobelts have gained increasing interest because of its outstanding properties and promising applications in a wide range of fields. Here we report the facile synthesis of hydrogenated TiO2 (H-TiO2) nanobelts, which exhibit excellent UV and visible photocatalytic decomposing of methyl orange (MO) and water splitting for hydrogen production. The improved photocatalytic property can be attributed to the Ti(3+) ions and oxygen vacancies in TiO2 nanobelts created by hydrogenation. Ti(3+) ions and oxygen vacancies can enhance visible light absorption, promote charge carrier trapping, and hinder the photogenerated electron-hole recombination. This work offers a simple strategy for the fabrication of a wide solar spectrum of active photocatalysts, which possesses significant potential for more efficient photodegradation, photocatalytic water splitting, and enhanced solar cells using sunlight as light source.
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Affiliation(s)
- Jian Tian
- School of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China; State key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Yanhua Leng
- State key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Hongzhi Cui
- School of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China.
| | - Hong Liu
- State key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China.
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45
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Wang P, Liu Q, Zhang CY, Jiang J, Wang LH, Chen DY, Xu QF, Lu JM. Preparing non-volatile resistive switching memories by tuning the content of Au@air@TiO2-h yolk-shell microspheres in a poly(3-hexylthiophene) layer. NANOSCALE 2015; 7:19579-19585. [PMID: 26541116 DOI: 10.1039/c5nr05835j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Crystalline hybrid microspheres, encapsulating a Au nanocore in the hollow cavity of a hairy semiconductor TiO2 shell (Au@air@TiO2-h microspheres) were prepared using template-assisted synthesis methods. The as-prepared microspheres are dispersed into a poly(3-hexylthiophene) (P3HT) matrix and used as a memory active layer. The electrical rewritable memory effects of Al/[Au@air@TiO2-h + P3HT]/ITO sandwich devices can be effectively and exactly controlled by tuning the microsphere content in the electroactive layer. To clarify the switching mechanism, different components in the device, such as P3HT and the microspheres, have been investigated. And it was determined that the switching mechanism can be attributed to the formation and rupture of oxygen vacancy filaments. These results suggest that the Au@air@TiO2-h microspheres are potentially capable of high density data storage. In addition, this finding could provide important guidelines for the reproducibility of nanocomposite-based memory devices and is helpful to demonstrate the switching mechanism of these devices.
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Affiliation(s)
- Peng Wang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, 199 Ren'ai Road, Suzhou 215123, China.
| | - Quan Liu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, 199 Ren'ai Road, Suzhou 215123, China.
| | - Chun-Yu Zhang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, 199 Ren'ai Road, Suzhou 215123, China.
| | - Jun Jiang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, 199 Ren'ai Road, Suzhou 215123, China.
| | - Li-Hua Wang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, 199 Ren'ai Road, Suzhou 215123, China.
| | - Dong-Yun Chen
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, 199 Ren'ai Road, Suzhou 215123, China.
| | - Qing-Feng Xu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, 199 Ren'ai Road, Suzhou 215123, China.
| | - Jian-Mei Lu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, 199 Ren'ai Road, Suzhou 215123, China.
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46
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Lv H, Ji G, Zhang H, Li M, Zuo Z, Zhao Y, Zhang B, Tang D, Du Y. CoxFey@C Composites with Tunable Atomic Ratios for Excellent Electromagnetic Absorption Properties. Sci Rep 2015; 5:18249. [PMID: 26659124 PMCID: PMC4676003 DOI: 10.1038/srep18249] [Citation(s) in RCA: 88] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Accepted: 11/16/2015] [Indexed: 11/12/2022] Open
Abstract
The shell on the nano-magnetic absorber can prevent oxidation, which is very important for its practical utilization. Generally, the nonmagnetic shell will decrease the integral magnetic loss and thus weaken the electromagnetic absorption. However, maintaining the original absorption properties of the magnetic core is a major challenge. Here, we designed novel and facile CoxFey@C composites by reducing CoxFe3−xO4@phenolic resin (x = 1, 0.5 and 0.25). High saturation magnetization value (Ms) of CoxFey particle, as a core, shows the interesting magnetic loss ability. Meanwhile, the carbon shell may increase the integral dielectric loss. The resulting composite shows excellent electromagnetic absorption properties. For example, at a coating thickness of 2 mm, the RLmin value can reach to −23 dB with an effective frequency range of 7 GHz (11–18 GHz). The mechanisms of the improved microwave absorption properties are discussed.
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Affiliation(s)
- Hualiang Lv
- College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China
| | - Guangbin Ji
- College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China
| | - Haiqian Zhang
- College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China
| | - Meng Li
- College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China
| | - Zhongzheng Zuo
- College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China
| | - Yue Zhao
- College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China
| | - Baoshan Zhang
- School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Dongming Tang
- School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Youwei Du
- Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, P. R. China
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47
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Cao Y, Wang Z, Liao S, Wang J, Wang Y. A Light-Activated Microheater for the Remote Control of Enzymatic Catalysis. Chemistry 2015; 22:1152-8. [DOI: 10.1002/chem.201503665] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2015] [Indexed: 12/20/2022]
Affiliation(s)
- Yuanyuan Cao
- Department of Chemistry; Renmin University of China; Beijing 100872 PR China
| | - Zhen Wang
- Department of Chemistry; Renmin University of China; Beijing 100872 PR China
| | - Shenglong Liao
- Department of Chemistry; Renmin University of China; Beijing 100872 PR China
| | - Jian Wang
- Department of Chemistry; Renmin University of China; Beijing 100872 PR China
| | - Yapei Wang
- Department of Chemistry; Renmin University of China; Beijing 100872 PR China
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48
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Wang Y, Sun D, Liu G, Jiang W. Synthesis of Fe3O4@SiO2@ZnO core–shell structured microspheres and microwave absorption properties. ADV POWDER TECHNOL 2015. [DOI: 10.1016/j.apt.2015.08.014] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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49
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Wen SL, Liu Y, Zhao XC. Facile chemical synthesis, electromagnetic response, and enhanced microwave absorption of cobalt powders with controllable morphologies. J Chem Phys 2015; 143:084707. [DOI: 10.1063/1.4929842] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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50
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Zhang X, Ji G, Liu W, Quan B, Liang X, Shang C, Cheng Y, Du Y. Thermal conversion of an Fe₃O₄@metal-organic framework: a new method for an efficient Fe-Co/nanoporous carbon microwave absorbing material. NANOSCALE 2015; 7:12932-42. [PMID: 26167763 DOI: 10.1039/c5nr03176a] [Citation(s) in RCA: 115] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
A novel FeCo nanoparticle embedded nanoporous carbon composite (Fe-Co/NPC) was synthesized via in situ carbonization of dehydro-ascorbic acid (DHAA) coated Fe3O4 nanoparticles encapsulated in a metal-organic framework (zeolitic imidazolate framework-67, ZIF-67). The molar ratio of Fe/Co significantly depends on the encapsulated content of Fe3O4 in ZIF-67. The composites filled with 50 wt% of the Fe-Co/NPC-2.0 samples in paraffin show a maximum reflection loss (RL) of -21.7 dB at a thickness of 1.2 mm; in addition, a broad absorption bandwidth for RL < -10 dB which covers from 12.2 to 18 GHz can be obtained, and its minimum reflection loss and bandwidth (RL values exceeding -10 dB) are far greater than those of commercial carbonyl iron powder under a very low thickness (1-1.5 mm). This study not only provides a good reference for future preparation of carbon-based lightweight microwave absorbing materials but also broadens the application of such kinds of metal-organic frameworks.
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Affiliation(s)
- Xingmiao Zhang
- College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, Peoples Republic of China.
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