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Qian X, Yu H, Chen W, Wu J, Xia J, Chen M, Xiong Y, Jiang X. Dandelion-like VSe 2-embellished CuSe-Co 3Se 4 hollow nanotube clusters as bifunctional catalysts for high-performance alkaline hydrogen evolution and solar cells. J Colloid Interface Sci 2024; 675:761-771. [PMID: 38996705 DOI: 10.1016/j.jcis.2024.07.072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2024] [Revised: 07/08/2024] [Accepted: 07/09/2024] [Indexed: 07/14/2024]
Abstract
Among the various non-precious metal catalysts that drive hydrogen evolution reactions (HERs) and dye-sensitized solar cells (DSSCs), transition metal selenides (TMSs) stand out due to their unique electronic properties and tunable morphology. Herein, the multicomponent selenide CuSe-Co3Se4@VSe2 was successfully synthesized by doping with metal element vanadium and selenization on the copper-cobalt carbonate hydroxide (CuCo-CH) template. CuSe-Co3Se4@VSe2 exhibited the dandelion-like cluster structure composed of hollow nanotubes doped with VSe2 nanoparticles. Due to the unique structure and the synergistic effect of various elements, CuSe-Co3Se4@VSe2 showed excellent alkaline HER and DSSC performances. The DSSC based on CuSe-Co3Se4@VSe2 exhibited an impressive power conversion efficiency (PCE) of 9.64 %, which was much higher than that of Pt (8.39 %). Besides, it possessed a low HER overpotential of 76 mV@10 mA cm-2 and a small Tafel slope of 88.9 mV dec-1 in 1.0 M KOH.
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Affiliation(s)
- Xing Qian
- College of Chemical Engineering, Fuzhou University, Fuzhou 350108, China.
| | - Hao Yu
- College of Chemical Engineering, Fuzhou University, Fuzhou 350108, China
| | - Wenbin Chen
- College of Chemical Engineering, Fuzhou University, Fuzhou 350108, China
| | - Jianhua Wu
- College of Chemical Engineering, Fuzhou University, Fuzhou 350108, China
| | - Juan Xia
- School of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang 236037, China
| | - Ming Chen
- College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang 464000, China
| | - Yonglian Xiong
- College of Automotive Engineering, Yancheng Institute of Technology, Yancheng 224051, China
| | - Xiancai Jiang
- College of Chemical Engineering, Fuzhou University, Fuzhou 350108, China
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Zhang J, Chen L, Li X, Cao H, Chen W, Wang X. Regulation Dipole Moments of N-Doped Graphene Coordinated with FePc Toward Highly Efficient Microwave Absorption Performance in C Band. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2308459. [PMID: 38348906 DOI: 10.1002/smll.202308459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 01/05/2024] [Indexed: 02/21/2024]
Abstract
The development of composites with highly efficient microwave absorption (MA) performance deeply depends on polarization loss, which can be induced by charge redistribution. Considering the fact that polarization centers can be easily obtained in graphene, herein, iron phthalocyanine (FePc) is used as polarization site to coordinate with nitrogen-doped graphene (FePc/N-rGO) to optimize MA performance comprehensively. The factors influencing MA properties focus on the interaction between FePc and N-rGO, and the change of dipole moments. The density functional theory (DFT) results demonstrated that FePc has strong interaction with N defect sites in graphene. The charge loss for FePc and charge accumulation for N-rGO occurred, leading to great increase of dipole moment, and the increased dipole moment can be acted as a descriptor to evaluate the enhanced polarization loss. Due to high charge redistribution capacity of N defect sites and FePc polarization centers, the FePc/N-rGO showed excellent MA properties in C band, and the minimum reflection loss value can reach -49.3 dB at 5.4 GHz with thickness of 3.8 mm. In addition, the fabric loaded with FePc/N-rGO showed good heat dissipation property. This work opens the door to the development of MA performance bound to polarization site with dipole moment.
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Affiliation(s)
- Jinming Zhang
- College of Materials Science and Engineering, Qingdao University, 308 Ningxia Road, Qingdao, 266071, P. R. China
| | - Lin Chen
- College of Materials Science and Engineering, Qingdao University, 308 Ningxia Road, Qingdao, 266071, P. R. China
| | - Xing Li
- College of Materials Science and Engineering, Qingdao University, 308 Ningxia Road, Qingdao, 266071, P. R. China
| | - Haijie Cao
- College of Materials Science and Engineering, Qingdao University, 308 Ningxia Road, Qingdao, 266071, P. R. China
| | - Wansong Chen
- College of Materials Science and Engineering, Qingdao University, 308 Ningxia Road, Qingdao, 266071, P. R. China
| | - Xiaoxia Wang
- College of Materials Science and Engineering, Qingdao University, 308 Ningxia Road, Qingdao, 266071, P. R. China
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Yu W, Lin J, Cao Y, Fang J, Wang Z, Huang J, Min Y. In situ fabrication of Fe 3C nanoparticles and porous-carbon composites as high-performance electromagnetic wave absorber. RSC Adv 2024; 14:16971-16981. [PMID: 38799218 PMCID: PMC11123618 DOI: 10.1039/d4ra01093k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Accepted: 04/02/2024] [Indexed: 05/29/2024] Open
Abstract
This study successfully utilized a straightforward approach, choosing liquid-liquid phase separation to build a porous structure and synthesize composite absorbers based on polyimide-based porous carbon/Fe3C (PIC/Fe3C-1, PIC/Fe3C-2) nanoparticles and porous carbon/FeCo alloy nanoparticles (PIC/FeCo). The specially designed network structure pore structures contributed multiple reflection, conduction loss and strong interfacial polarization. After characterization, PIC/Fe3C-2 obtained minimum RL of -35.37 dB at 17.04 GHz with 1.55 mm thickness and effective absorption bandwidth of 4.95 GHz with 1.66 mm thickness. Furthermore, PIC/FeCo, with a thickness of 1.63 mm, exhibits the most robust electromagnetic wave loss ability at 15.6 GHz, with a minimum RL of -56.32 dB and an effective absorption bandwidth of 4.88 GHz. Thus, the design strategy presented in this study could serve as a model for synthesizing other high-performance absorbers, effectively mitigating electromagnetic wave-induced pollution.
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Affiliation(s)
- Wentao Yu
- Department of Polymer Materials and Engineering, School of Materials and Energy, Guangdong University of Technology Guangzhou 51006 China
| | - Jiahui Lin
- Department of Polymer Materials and Engineering, School of Materials and Energy, Guangdong University of Technology Guangzhou 51006 China
| | - Yan Cao
- Department of Polymer Materials and Engineering, School of Materials and Energy, Guangdong University of Technology Guangzhou 51006 China
| | - Jiyong Fang
- Midea Corporate Research Center Foshan 528000 China
| | - Ziqing Wang
- Visionox Technology Co., Ltd Guangzhou 51000 China
| | - Jintao Huang
- Department of Polymer Materials and Engineering, School of Materials and Energy, Guangdong University of Technology Guangzhou 51006 China
| | - Yonggang Min
- Department of Polymer Materials and Engineering, School of Materials and Energy, Guangdong University of Technology Guangzhou 51006 China
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Li S, Sun Y, Zhang K, Jiang X, Yu H. In Situ Fabrication of Heterogeneous Co/Nanoporous Carbon Nano-Islands for Excellent Electromagnetic Wave Absorption. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2306990. [PMID: 38084443 DOI: 10.1002/smll.202306990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Revised: 11/26/2023] [Indexed: 05/25/2024]
Abstract
High-performance electromagnetic wave (EMW) absorbers are essential for addressing electromagnetic pollution and military security. However, challenges remain in realizing cost-effectiveness and modulating absorbing properties. In this study, heterogeneous Co/nanoporous carbon (NPC) nano-islands are prepared by efficient method co-precipitation combined with in situ pyrolysis. The multi-regulation strategy of morphology, graphitization, and defect density is achieved by modulating the pyrolysis temperature. Adjusting the pyrolysis temperature can effectively balance the conductivity and defect density, optimizing the impedance matching and enhancing the attenuation. Furthermore, it facilitates obtaining the appropriate shape and size of Co magnetic nanoparticles (Co-MNPs), triggering strong surface plasmon resonance. This resonance, in turn, bolsters the synergy of dielectric and magnetic loss. The incorporation of porous nanostructures not only optimizes impedance matching and enhances multiple reflections but also improves interfacial polarization. Additionally, the presence of enriched defects and heteroatom doping significantly enhances dipole polarization. Notably, the absorber exhibits an impressive minimum reflection loss (RLmin) of -73.87 dB and a maximum effective absorption bandwidth (EABmax) of 6.64 GHz. The combination of efficient fabrication methods, a performance regulation strategy through pyrolysis temperature modulation, and radar cross section (RCS) simulation provides a high-performance EMW absorber and can pave the way for large-scale applications.
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Affiliation(s)
- Shanxin Li
- School of Materials, Sun Yat-sen University & Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, 519082, P. R. China
| | - Yijing Sun
- Sino-French Institute of Nuclear Engineering & Technology, Sun Yat-Sen University, Zhuhai, 519082, P. R. China
| | - Kai Zhang
- School of Materials, Sun Yat-sen University & Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, 519082, P. R. China
| | - Xuzhou Jiang
- School of Materials Science and Engineering, Sun Yat-Sen University, Guangzhou, 510006, P. R. China
| | - Hongying Yu
- School of Materials, Sun Yat-sen University & Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, 519082, P. R. China
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Meng L, Wang J, Qi J, Liu X, Li L, Yun J, Wang G, Yan J, Bai J. Yolk-shell construction of Co 0.7Fe 0.3 modified with dual carbon for broadband microwave absorption. J Colloid Interface Sci 2024; 659:945-958. [PMID: 38219313 DOI: 10.1016/j.jcis.2024.01.052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 01/05/2024] [Accepted: 01/08/2024] [Indexed: 01/16/2024]
Abstract
The rational and effective combination of multicomponent materials and the design of subtle microstructure for efficient microwave absorption are still challenging. In this study, carbon-coated CoFe with heterogeneous interfaces was space-restricted in the void space of hollow mesoporous carbon spheres through a facile approach involving electrostatic adsorption and annealing, and a high-performance microwave absorber (MAs) (denoted as Co0.7Fe0.3@C@void@C) was successfully prepared. The heterostructure, three-dimensional lightweight porous morphology, and electromagnetic synergy strategy enabled the Co0.7Fe0.3@C@void@C material with yolk-shell structure to exhibit surprising microwave absorption properties. When the annealing temperature and filler loading were 550° C and 15 wt%, respectively, the composites exhibited an effective absorption bandwidth (EAB) of 7.16 GHz at 2.48 mm and a minimum reflection loss of -24.1 dB at 2.11 mm. A maximum EAB of 7.21 GHz at 2.37 mm could be achieved for the composite prepared with an annealing temperature of 650° C. In addition, radar cross-section experiments demonstrated, the potential practical applicability of Co0.7Fe0.3@C@void@C. This work expands a new avenue to develop high-performance and lightweight MAs with ingenious microstructure.
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Affiliation(s)
- Lizheng Meng
- State Key Laboratory of Photon-Technology in Western China Energy, Institute of Photonics & Photon-Technology, Northwest University, Xi'an 710127, People's Republic of China
| | - Jiahao Wang
- School of Information Science and Technology, Northwest University, Xi'an 710127, People's Republic of China
| | - Junyao Qi
- State Key Laboratory of Photon-Technology in Western China Energy, Institute of Photonics & Photon-Technology, Northwest University, Xi'an 710127, People's Republic of China
| | - Xiangling Liu
- State Key Laboratory of Photon-Technology in Western China Energy, Institute of Photonics & Photon-Technology, Northwest University, Xi'an 710127, People's Republic of China
| | - Ling Li
- State Key Laboratory of Photon-Technology in Western China Energy, Institute of Photonics & Photon-Technology, Northwest University, Xi'an 710127, People's Republic of China
| | - Jiangni Yun
- School of Information Science and Technology, Northwest University, Xi'an 710127, People's Republic of China; Department of Physics, McGill University, Montreal, Quebec H3A 2T8, Canada
| | - Gang Wang
- State Key Laboratory of Photon-Technology in Western China Energy, Institute of Photonics & Photon-Technology, Northwest University, Xi'an 710127, People's Republic of China.
| | - Junfeng Yan
- School of Information Science and Technology, Northwest University, Xi'an 710127, People's Republic of China.
| | - Jintao Bai
- State Key Laboratory of Photon-Technology in Western China Energy, Institute of Photonics & Photon-Technology, Northwest University, Xi'an 710127, People's Republic of China
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Yu W, Lin J, Zhao Z, Fang J, Wang Z, Huang J, Min Y. Polyimide-based porous carbon and cobalt nanoparticle composites as high-performance electromagnetic wave absorbers. RSC Adv 2024; 14:9716-9724. [PMID: 38525061 PMCID: PMC10958461 DOI: 10.1039/d4ra00488d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Accepted: 02/19/2024] [Indexed: 03/26/2024] Open
Abstract
This study successfully utilized a straightforward approach, choosing liquid-liquid phase separation to build a porous structure and synthesize composite absorbers based on polyimide-based porous carbon and cobalt nanoparticles (designated as PPC/Co-700 and PPC/Co-800). A fine porous structure was achieved as a result of the excellent heat resistance of polyimide resulting in an excellent electromagnetic wave absorption ability of PPC/Co composites. The results obtained clearly indicated that PPC/Co-700 and PPC/Co-800 exhibit a porous structure with coral-like pores, enhancing both impedance matching properties and microwave attenuation abilities. This improvement in impedance matching conditions and dissipation capability is attributed to the synergistic effect of dielectric loss induced by carbon and magnetic loss induced by Co nanoparticles. PPC/Co-700 showed the strongest absorption performance with a minimum reflection loss of -59.85 dB (30 wt% loading, thickness of 3.42 mm) and an effective absorption bandwidth (EABW, RL ≤ -10 dB) of 6.24 GHz (30 wt% loading, thickness of 2.78 mm). Therefore, this work provides a facile strategy for the development of a promising absorbing material with outstanding electromagnetic wave absorption performance.
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Affiliation(s)
- Wentao Yu
- Guangdong University of Technology Guangzhou 51000 Guangdong China
| | - Jiahui Lin
- Guangdong University of Technology Guangzhou 51000 Guangdong China
| | - Zhaozhang Zhao
- Guangdong University of Technology Guangzhou 51000 Guangdong China
| | - Jiyong Fang
- Midea Corporate Research Cente Foshan 528000 Guangdong China
| | - Ziqing Wang
- Visionox Technology Co., Ltd Guangzhou 51000 Guangdong China
| | - Jintao Huang
- Guangdong University of Technology Guangzhou 51000 Guangdong China
| | - Yonggang Min
- Guangdong University of Technology Guangzhou 51000 Guangdong China
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Xu F, Fan S, Li Y, Ma J, Yang L, Ma S. Removal and recycling of aqueous selenite anions using cobalt-based metal-organic-framework coated on multi-walled carbon nanotubes composite membrane. J Colloid Interface Sci 2024; 653:493-503. [PMID: 37729757 DOI: 10.1016/j.jcis.2023.09.105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Revised: 09/07/2023] [Accepted: 09/16/2023] [Indexed: 09/22/2023]
Abstract
The utilization of selenium as a novel functional material is rapidly expanding, and the retrieval of selenium from waste containing selenium is gaining recognition in the industry. This study prepared a novel composite membrane coated with the cobalt-based metal-organic framework coated on multi-walled carbon nanotubes (Co-MOF@MWCNTs). The MWCNTs served as the skeleton to support the active components of Co-MOF, which enabled efficient removal and resource utilization of liquid selenite (SeO32-). The morphology, structure, and composition of the prepared membrane were characterized using field emission scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), etc.. Applying a permeate flux of 67.08 L m-2 h-1, the SeO32- removal efficiency of the composite membrane reached up to 92.2%. The composite membrane containing CoSeO4 can be used as an electrocatalytic oxygen evolution catalyst. Density functional theory calculations and electrochemical analysis showed that the conversion from O* to OOH* was a rate-determining step. Under 1.0 M KOH conditions, the lowest overpotential for Co-MOF@MWCNTs-40 at 10 mA cm-2 was 360 mV. In this study, the process of selenium resource utilization and the mechanism of SeO32- removal by Co-MOF@MWCNTs are revealed. It demonstrates that membrane-based sequestration of SeO32- can provide a viable approach for SeO32- removal and utilization in wastewater.
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Affiliation(s)
- Fang Xu
- Hebei Key Laboratory of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science and Engineering, North China Electric Power University, Baoding 071003, PR China; Moe Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, PR China
| | - Shuaijun Fan
- Hebei Key Laboratory of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science and Engineering, North China Electric Power University, Baoding 071003, PR China; Moe Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, PR China
| | - Ying Li
- Hebei Key Laboratory of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science and Engineering, North China Electric Power University, Baoding 071003, PR China
| | - Jingxiang Ma
- Hebei Key Laboratory of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science and Engineering, North China Electric Power University, Baoding 071003, PR China; Moe Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, PR China
| | - Lijuan Yang
- Hebei Key Laboratory of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science and Engineering, North China Electric Power University, Baoding 071003, PR China
| | - Shuangchen Ma
- Hebei Key Laboratory of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science and Engineering, North China Electric Power University, Baoding 071003, PR China; Moe Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, PR China.
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