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Wang H, Feng S, Sun M, Li X, Wang C, Lin Z, Ma M, Li T, Ma Y. Fabrication of hollow core-shell NiCo 2O 4@polypyrrole nanofibers/reduced graphene oxide ternary composites with excellent microwave absorption performances. J Colloid Interface Sci 2024; 658:889-902. [PMID: 38157613 DOI: 10.1016/j.jcis.2023.12.132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 12/18/2023] [Accepted: 12/19/2023] [Indexed: 01/03/2024]
Abstract
In contemporary times, electromagnetic radiation poses a significant threat to both human health and the normal functioning of electronic devices. Developing composites as adsorption materials possess exceptional electromagnetic wave absorption performances can efficient address this critical issue. Herein, hollow core-shell NiCo2O4@polypyrrole nanofibers/reduced graphene oxide (NiCo-HFPR) composites are fabricated by the combination of electrostatic spinning, air calcination, in-situ polymerization, freeze-drying and hydrazine vapor reduction. As anticipated, NiCo-HFPR-0.2 exhibits noteworthy properties, with the minimum reflection loss (RLmin) of -61.20 dB at 14.26 GHz and 1.56 mm, as well as the effective absorption bandwidth (EAB) of 4.90 GHz at 1.57 mm. Additionally, the simulation procedure is employed to determine the radar cross-section (RCS) attenuation. In comparison to a singular perfect electrically conductive (PEC) layer, the PEC layer coated with NiCo-HFPR-0.2 consistently yields an RCS value below -10 dB m2 within the range of -60° < θ < 60°. The RCS attenuation value of the NiCo-HFPR-0.2 coating achieves an outstanding 31.0 dB m2 at θ = 0°, strongly affirming the ability to effectively attenuate electromagnetic wave in real-world applications. The employed experimental methodology, the meticulously crafted composite, and the simulation outcomes presented in this study bear great promise for the progressive advancement of both theoretical investigations and practical applications within the domain of electromagnetic wave absorption.
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Affiliation(s)
- Haowen Wang
- School of Material Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, PR China
| | - Shixuan Feng
- School of Material Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, PR China
| | - Maoqin Sun
- Bodo Plastics Co., Ltd, Zibo 256100, PR China
| | - Xue Li
- School of Material Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, PR China
| | - Chuanjin Wang
- School of Material Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, PR China
| | - Zhongtai Lin
- School of Material Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, PR China
| | - Mingliang Ma
- School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, PR China
| | - Tingxi Li
- School of Material Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, PR China
| | - Yong Ma
- School of Material Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, PR China.
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Qiu F, Wang L, Li H, Pan Y, Song H, Chen J, Fan Y, Zhang S. Electrochemically enhanced activation of Co 3O 4/TiO 2 nanotube array anode for persulfate toward high catalytic activity, low energy consumption, and long lifespan performance. J Colloid Interface Sci 2024; 655:594-610. [PMID: 37956547 DOI: 10.1016/j.jcis.2023.11.045] [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: 08/18/2023] [Revised: 11/06/2023] [Accepted: 11/07/2023] [Indexed: 11/15/2023]
Abstract
Advanced oxidation processes (AOPs) can directly degrade and mineralize organic pollutants (OPs) in water by generating reactive oxygen species with strong oxidizing ability. The development of advanced electrode materials with high catalytic performance, low energy consumption, no secondary pollution, and long lifespan has become a challenge that must be addressed in this field. A heterojunction catalyst loaded with Co3O4 on TDNAs (Co3O4/RTDNAs) was designed and constructed by a simple and efficient pyrolysis (Co3O4/TDNAs) and electrochemical reduction. Co3O4 can be uniformly distributed on the inner wall and surface of the TiO2 nanotubes, enhancing the specific surface area while forming a tight conductive interface with TiO2. This facilitates rapid transmission of electrons, thereby assisting Co3O4 in quickly activating PS to form reactive oxygen species. The Ti3+ and Ov generated in Co3O4/RTDNAs can significantly improve the electrocatalytic degradation of OPs. Also, the interface formed by Co3O4 and RTDNAs will effectively suppress Co2+ leakage, thereby reducing the risk of secondary pollution. When the reaction conditions were 1 mM PMS (PDS) and a current density of 5 mA/cm2 in the EA-PMS (PDS)/Co3O4/RTDNA system, 30 mg/L TC can achieve 83.24 % (81.89 %) removal in 120 min, with very low cobalt ion leaching, while the energy consumption was reduced significantly. Therefore, EA-PS/Co3O4/RTDNA system has strong stability and a high potential for treating the OPs in AOPs.
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Affiliation(s)
- Fan Qiu
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, PR China
| | - Luyao Wang
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, PR China
| | - Hongxiang Li
- School of Environment, Nanjing Normal University, Nanjing, 210097, PR China
| | - Yanan Pan
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, PR China
| | - Haiou Song
- School of Environment, Nanjing Normal University, Nanjing, 210097, PR China.
| | - Junjie Chen
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, PR China
| | - Yang Fan
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, PR China
| | - Shupeng Zhang
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, PR China.
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Nan Y, Zhang Z, Wang Z, Yuan H, Zhou Y, Wei J. Controllable Synthesis of Mo 3C 2 Encapsulated by N-Doped Carbon Microspheres to Achieve Highly Efficient Microwave Absorption at Full Wavebands: From Lemon-like to Fig-like Morphologies. Inorg Chem 2022; 61:6281-6294. [PMID: 35412830 DOI: 10.1021/acs.inorgchem.2c00533] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Mo3C2@N-doped carbon microspheres (Mo3C2@NC) have been discovered to be a family of superior microwave absorbing materials. Herein, Mo3C2@NC was synthesized through a simple high-temperature carbonization process by evaporating a graphite anode and Mo wire in Ar and N2 atmospheres with an N-doping content of 6.4 at. %. Attributing to the self-assembly mechanism, the number of Mo wires inserted into the graphite anode determined the morphologies of Mo3C2@NC, which were the unique lemon-like (1- and 2-Mo3C2@NC) and fig-like (3-, 4-, and 5-Mo3C2@NC) microstructures. 1- and 2-Mo3C2@NC exhibited powerful reflection losses (RLs) of -45.60, -45.59, and -47.11 dB at the S, C and X bands, respectively, which corresponded to thinner thicknesses. 3-, 4-, and 5-Mo3C2@NC showed outstanding absorption performance at the C, X, and Ku bands, respectively, with each value of a minimum RL less than -43.00 dB. In particular, the strongest RL (-43.56 dB) for 5-Mo3C2@NC corresponded to an ultrathin thickness of 1.3 mm. In addition, the maximum effective absorption bandwidth was 6.3 GHz for 4-Mo3C2@NC. After analysis, all Mo3C2@NC samples showed well-matched impedance due to the enhanced dielectric loss caused by the unique carbon structure and moderate magnetic loss derived from the weak magnetic property of Mo3C2. More importantly, the unique lemon-like and fig-like microstructures created sufficient interfaces and differentiated multiple reflection paths, which greatly contributed to the strong microwave absorptions at full wavebands. In full consideration of the simple preparation method and tunable absorption properties, Mo3C2@NC composites can be regarded as excellent electromagnetic wave absorption materials.
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Affiliation(s)
- Yanli Nan
- School of Materials Science and Engineering, Shaanxi Key Laboratory of Nano Materials and Technology, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Zihan Zhang
- School of Materials Science and Engineering, Shaanxi Key Laboratory of Nano Materials and Technology, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Zhaoyu Wang
- School of Materials Science and Engineering, Shaanxi Key Laboratory of Nano Materials and Technology, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Hudie Yuan
- School of Materials Science and Engineering, Shaanxi Key Laboratory of Nano Materials and Technology, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Yun Zhou
- School of Medical Information and Engineering, Southwest Medical University, Lu Zhou 646000, China
| | - Jian Wei
- School of Materials Science and Engineering, Shaanxi Key Laboratory of Nano Materials and Technology, Xi'an University of Architecture and Technology, Xi'an 710055, China
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Wu C, Liu Z, Yuan Z, Wang Y, Xian G, Zhu Z, Xie N, Zhang H, Liu Y, Kong LB. Anchoring 1D nanochain-like Co 3O 4 on a 2D layered Ti 3C 2T x MXene with outstanding electromagnetic absorption. NEW J CHEM 2022. [DOI: 10.1039/d2nj02473j] [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
3D superstructure Ti3C2Tx/Co3O4 nanochain composites were synthesized through electrostatic self-assembly, in which 1D Co3O4 nanochains were anchored on a 2D layered Ti3C2Tx surface.
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Affiliation(s)
- Chongmei Wu
- School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, Anhui, China
| | - Zhenying Liu
- School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, Anhui, China
- State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan, 232001, Anhui, China
| | - Ziqing Yuan
- School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, Anhui, China
| | - Yan Wang
- School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, Anhui, China
| | - Guiyang Xian
- School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, Anhui, China
| | - Zhaolin Zhu
- School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, Anhui, China
| | - Nan Xie
- School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, Anhui, China
| | - Hanxin Zhang
- School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, Anhui, China
| | - Yin Liu
- School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, Anhui, China
- Anhui International Joint Research Center for Nano Carbon-Based Materials and Environmental Health, Anhui University of Science and Technology, Huainan, 232001, Anhui, China
- State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan, 232001, Anhui, China
| | - Ling Bing Kong
- College of New Materials and New Energies, Shenzhen Technology University, Shenzhen 518118, Guangdong, China
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