SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Hongai Zheng,Xiqian Zheng,Meilin Zhu,Cunzheng Xiao,Mengyao Li,Daquan Zhang,Lizhi Zhang
Modification of membranes is an effective method for degrading organic pollutants and alleviating membrane fouling. In this study, CuO-Fe 3 C-C catalyst was prepared by high-temperature pyrolysis. The membrane modified by CuO- Fe 3 C-C was prepared by vacuum filtration. The bacteriostatic rate of the modified membrane can reach to 96.8 %. Compared to the pristine membrane, the pure water flux of the modified membrane increased from 223.43 L m −2 h −1 bar −1 to 422.27 L m −2 h −1 bar −1 , the flux recovery ratio (FRR) of modified membranes increased from 39.7 % to 79.25 %. Removal rate of TC (Tetracycline) by modified membrane activated PMS can reach to 90.75 %. After 5 cycles, the degradation efficiency of modified membranes was still 83.77 %, which was only 6.39 % lower than that of the first cycle. Free radical quenching experiments and ESR tests explored the possible catalysis and antifouling mechanisms of the modified membrane system, the results showed main active species were SO 4 − •, OH•, O 2 − • and 1 O 2 . This study prepared membranes with excellent antifouling properties, providing a theoretical reference for alleviating membrane fouling in membrane-based water treatment.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2024
·
IF 8.1
Yihui Zhou,Jin Qian,Zhe Qiang,Weiqing Kong,Changhuai Ye,Meifang Zhu
Heterogeneous interfaces are crucial for enhancing the polarization loss in composite materials, thereby improving microwave absorption capabilities. However, creating well-defined multiple heterogeneous interfaces essential for optimal absorber performance presents a significant challenge. Herein, Fe/Fe 3 C@C magnetic-carbon composites featuring Fe-Fe 3 C-C multiple heterogeneous interfaces were fabricated through in-situ growth of Fe 3 O 4 on polydopamine nanospheres, followed by thermal reduction and carbonization. Owing to the controllable Fe-Fe 3 C-C multiple heterointerface design, the outer-layer magnetic components not only significantly improve impedance matching but also enhance the interface polarization loss. The optimized Fe/Fe 3 C@C-9–1 composite exhibits excellent microwave absorption performance, achieving a minimum reflection loss (RL min ) of −64.4 dB and a broad effective absorption bandwidth (EAB) of 6.0 GHz at a thin matching thickness of only 1.5 mm, surpassing neat carbon nanospheres and most magnetic-carbon materials. Additionally, simulations conducted using Computer Simulation Technology (CST) demonstrate that the Fe/Fe 3 C@C-9–1 coating significantly reduces radar cross-section (RCS), with values below −20 dB across nearly the entire frequency range of 2–18 GHz, highlighting its potential for radar stealth applications. This work provides a simple yet effective approach for tuning the interface properties of carbon-based materials, underscoring the promise of Fe-Fe 3 C-C multiple heterogeneous interfaces in the development of broadband, thin microwave absorbers.
研究领域:
材料科学
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电磁学
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DOI
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 36
·20614-20623
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IF 10.733
Wei Kou,Guohui Chen,Yang Liu,Weixin Guan,Xiangcun Li,Ning Zhang,Gaohong He
To realize an Al-free cathode and to push forward the Li–S battery technology for practical applications, a multifunctional three-layer-structured Fe3C/C membrane was prepared at a large-scale via a facile phase-inversion method. The scalable yet flexible self-supporting Fe3C/C membrane is an ideal Al foil-free cathode material for high-energy and long cycling Li–S batteries. The conductive dense layer of the Fe3C/C membrane can replace the Al foil as a current collector and the finger-like macropores can host most of the sulfur active material (1.5–3.0 mg cm−2), thus buffering the volume expansion of the sulfur species and facilitating the ion/electrolyte transport for fast reaction kinetics; meanwhile, the sponge-like pores in the top layer of the composite membrane enable further S slurry loading. Density functional theory simulation (DFT) and Li2S6 adsorption measurements reveal that the doped Fe3C species in the composite membrane could effectively immobilize the S species and suppress the shuttle effect of the soluble polysulfides (LiPSs). The rationally designed Fe3C/C membrane cathodes could deliver a capacity of ∼601 mA h g−1 at 1C after 200 cycles even at a high sulfur loading of 3.4 mg cm−2, with a high areal capacity of 2.1 mA h cm−2. The cell with the sulfur loading of 3.4 mg cm−2 delivered a gravimetric energy density and volumetric energy density of 850 W h kg−1 and 1223 W h L−1, respectively. The self-supporting membrane cathode with simultaneous commercial S filling and S/C slurry coating provides an alternative sulfur loading approach for battery assembly, thus presenting a useful strategy for practical applications in high energy-density and long cycling Li–S batteries.
研究领域:
材料科学
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电化学
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能源存储
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2023
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IF 6.2
Guangjun Gou,Yu Liu,Qi Wan,Wanlu Hua,Xiaoli Xie,Bin Zhu,Zhen Tao
Three-dimensional (3D) porous carbon-based materials are commonly considered to be a hopeful microwave absorbing materials owing to their lightweight and broadband absorption. However, the structure between dissipation mechanism is still not clear. Therefore, in this work, the nitrogen-doped porous Fe 3 C@C nanocomposites derived from Fe(NO 3 ) 3 ·9 H 2 O and polyvinyl pyrrolidone (PVP) were fabricated through pre-blowing followed by in situ carbonization method with various temperatures. The obtained material treated at 600 °C, which the content of N was 4.07 %, exhibits the most excellent microwave absorption (MA) property with the minimal reflection loss of − 63.1 dB at 5.0 GHz while the matching thickness is 4.6 mm. The MA performance of the composite is originated from the synergy of magnetic-dielectric loss and improved interfacial polarization. This research provides a way to prepare high-property MA absorbers.
研究领域:
材料科学
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电磁学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2019
·Vol. 30
·期 15
·14573-14579
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IF 2.195
Teng Zhen,Zeng Sifan,Feng Wanlin,Zhu Lini,Tan Yongqiang,Han Xiaochun,Chen Chen,Zhang Haibin
Fe-Fe 3 C@C composites are successfully synthesized via a facile pyrolysis process. Experimental results indicate that Fe-Fe 3 C nanoparticles are closely parceled among amorphous carbon and exhibit a core–shell structure. The obtained materials display excellent microwave absorption performance with an optimal reflection loss of − 35.6 dB at 17.2 GHz, and an effective absorbing bandwidth of 4 GHz (from 12.4 to 16.4 GHz) with the coating thickness of 2 mm. The magnetic loss derived from Fe core and dielectric loss on carbon materials as well as a good impedance matching are believed to play decisive roles for this favorable microwave absorbing properties. The composites are considered to be good candidates for microwave absorption applications.
研究领域:
材料科学
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电磁学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2017
·Vol. 6
·期 2
·516-526
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IF 8.867
Qichen Wang,Yongpeng Lei,Zhiyan Chen,Nan Wu,Yaobing Wang,Bing Wang,Yingde Wang
3d transition metals or their derivatives encapsulated in nitrogen-doped nanocarbon show promising potential in non-precious metal oxygen electrocatalysts. Herein, we describe the simple construction of a bifunctional oxygen electrocatalyst with a “framework-active sites” structure, namely Fe/Fe3C@C (Fe@C) nanoparticles encapsulated in 3D N-doped graphene and bamboo-like CNTs (Fe@C–NG/NCNTs). The Fe@C structure provides additional electrons on the carbon surface, promoting the oxygen reduction reaction (ORR) on adjacent Fe–Nx active sites. The 3D NG hybrid with a bamboo-like CNTs framework facilitates fast reactant diffusion and rapid electron transfer. The optimized sample displays excellent ORR and oxygen evolution reaction (OER) activity, with a potential difference of only 0.84 V; this places it among the best bifunctional ORR/OER electrocatalysts. Most importantly, Zn–air batteries using Fe@C–NG/NCNTs as the cathode catalyst deliver a peak power density of 101.2 mW cm−2 and a specific capacity of 682.6 mA h g−1 (energy density of 764.5 W h kg−1). After 297 continuous cycle tests (99 h), the rechargeable batteries using Fe@C–NG/NCNTs show a voltage gap increase of only 0.13 V, almost half that of Pt/C + Ir/C (0.22 V) under the same conditions. This work provides new insight into advanced electrocatalysts utilizing the structural features of host nanocarbon materials and guest active species toward energy conversion.
研究领域:
材料科学
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能源化学
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产品关联
DOI
高影响因子
DALTON TRANSACTIONS
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2019
·Vol. 49
·期 3
·797-807
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IF 4.052
Xinxin Yang,Xiang Sun,Muhammad Rauf,Hongwei Mi,Lingna Sun,Libo Deng,Xiangzhong Ren,Peixin Zhang,Yongliang Li
N-Doped porous tremella-like Fe3C/C electrocatalysts derived from metal–organic frameworks (MOFs) were fabricated via a facile approach. The simply designed catalytic materials have unique fluffy multilayer interconnected porous morphology, which provides a large specific surface area and effectively prevents the agglomeration of nanoparticles. These special features create more active sites (Fe–Nx) on the surface of the electrocatalysts for oxygen reduction reaction (ORR) and the presence of the Fe–Nx active sites was verified via X-ray photoelectron spectroscopy. The effect of Fe intake through pyrolysis of MOFs materials was also studied and the composite with 0.04 g Fe source exhibited excellent ORR performance, a very small hydrogen peroxide yield, and followed the four-electron transfer pathway. The ORR activity of the electrocatalyst is comparable to that of commercial Pt/C, while the stability is even better than the latter in an alkaline solution. The facile method of preparing a multilayer porous N-doped tremella-like Fe3C/C electrocatalyst is a promising electrode material for a wide range of applications in fuel cells and metal–air batteries.
研究领域:
材料科学
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电化学
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能源材料
·
催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
·
IF 5.316
Chenghao Wang,LiShuai Zong,Nan Li,Yunxing Pan,Qian Liu,Fengfeng Zhang,Liyuan Qiao,Jinyan Wang,Xigao Jian
Emergency situation of electromagnetic microwave pollution generated by daily electronic devices urgently requires light-weight and efficient microwave absorption materials with thin thickness and low filling ratio. Herein, the heteroatoms-doped Fe 3 C@C nanofibers are fabricated from a mixture solution of Iron (III) 2, 4-pentanedionate (Fe(acac) 3 ) and nitrogen-containing polymer poly (phthalazinone ether nitrile ketone) (PPENK) by electrospinning and the following thermal treatment. The morphologies and compositions of nanofibers can be controlled by annealing temperature. The 1-Dimensional (1D) heteroatoms-doped Fe 3 C@C nanofibers display outstanding microwave absorption performance. When the filling ratio is 30 wt% in paraffin for nanofibers heat-treated in 700 ℃, the optimal reflection loss value is − 35.5 dB at 8.3 GHz with a thickness of 2.8 mm. Additionally, the maximal efficient absorption bandwidth reaches as wide as 4.9 GHz ranging from 13.1 to 18.0 GHz with a rather thin thickness of 1.6 mm. The Fe 3 C@C nanofibers have adjustable electromagnetic parameters and thus, balance impedance matching and microwave attenuation performance at the same time. This work investigates the relationship between microwave absorption performance and the chemical states of nitrogen atoms, revealing a facile strategy to prepare a multi-interface microwave absorber and presenting a candidate application for microwave absorption materials with low matching thickness.
研究领域:
材料科学
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电磁学
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纳米技术
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Zhuoran Sun,Wenjing Song,Hongli Chen,Lili Li
Designing and constructing reversible and stable anode materials was vital to lithium/sodium-ion batteries. Here, multiple carbon-protected Mn and Fe based composite anode with three-dimensional cross-linked networks was designed. The MnFe 2 O 4 composite nanoparticles were synthesized via co-precipitation firstly. Then by combining different coating technologies and heat treatment, MnO/Fe 3 C with stable carbon doped (MnO/Fe 3 C@C 3 ) composite anode for lithium/sodium-ion storage was prepared. The results showed that MnO/Fe 3 C@C 3 exhibited the excellent reversible capacities of 608.2 mAh g −1 at 0.2 C after 100 cycles and 348.2 mAh g −1 at 10 C after 1500 cycles for lithium-ion battery. MnO/Fe 3 C@C 3 as sodium-ion anode also showed the capacity of 282.4 mAh g −1 at 0.2 C after 100 cycles. The study indicated that MnO/Fe 3 C as active components were produced by the doped carbon participating in redox reaction. In addition, the stable doped carbon was also formed by the binding of graphitic carbon with carbon layers. GITT and EIS tests revealed that the addition of MWCNTs could effectively enhance the ion transport kinetics and further optimize the electrochemical performance. This study highlighted a way to construct the active component with stable doped carbon as anode, which could exhibit the excellent recyclability and electrochemical performance.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
Journal of Nano Research
·
2024
·
IF 0.8
Hong Wu Zhu,Yu Song Pan,Yuan Qing Wang,Yan Lei Xiang,Rong Han,Run Huang
Recoverable and stable nanocatalysts are essential for peroxymonosulfate - based advanced oxidation processes (AOPs) in wastewater purification treatment. In this paper, Fe3C nanorods @ nitrogen-doped carbon composites (N-Fe3C@C) with core-shell architecture were fabricated by the co-precipitation and calcination methods, and characterized and analyzed in terms of their crystal structure, microscopic morphology, and surface chemical elements. In addition, N-Fe3C@C-4 degraded 85.36% of tetracycline in 10 min under PMS, which was much higher than the catalytic ability of Fe3O4 (42.03% in 10 min). Both the active radical trapping and EPR experiments verified that 1O2 played a key role for degradation of organic dyes in PMS system. The investigation on the degradation mechanism revealed that the presence of the carbon layer facilitated to adsorb TC, accelerate free radical generation and promote the redox cycle of Fe2+/Fe3+ in the nanocatalyst. This study offers novel ideas for multifunctional catalysts for advanced wastewater purification treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
IONICS
·
2021
·Vol. 27
·期 8
·3663-3669
·
IF 2.817
Xiang Tong,Chen Zhi,Rao Zhixin,Yan Mingge,Feng Zhijun,Li Xibao,Yang Huiyong,Huang Juntong,Shen Xing
Iron carbide (Fe 3 C) has gained significant attention for use in energy storage applications. Furthermore, using a nano-scale metal as the catalyst can reduce the formation of a solid electrolyte interface (SEI), thus enhancing capacity. For these reasons, hierarchical Fe/Fe 3 C/C nanofibers are prepared by electrospinning with subsequent thermal treatment and used as the anodes for lithium ion batteries (LIBs). These anodes demonstrate a good rate and high capacities. At 0.1 A g −1 , the Fe/Fe 3 C/C nanofiber electrode maintains 518 mA h g −1 after 100 cycles. When tested at 1 A g −1 , the discharge capacity gradually increases and reaches 663 mA h g −1 after 1200 cycles. This work demonstrates the possibility to design and develop transition metal carbides (TMCs) for use in energy storage.
研究领域:
材料科学
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储能技术
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纳米技术
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电化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 13.2
Mengyao Zhang,Peng Miao,Haonan Zhang,Kaiwang Lu,Weixing Chen,Jinjin Dang,Yaozu Liao,Jie Kong
With the rapid development of electronic technology, electromagnetic pollution and thermal issues are increasingly exacerbating, particularly those enabling microwave-infrared compatibility. However, the integration of electromagnetic protection and thermal management remains a pivotal challenge. This study focuses on the multifunctional compatibility of microwave absorption and infrared stealth, addressing the critical challenge of integrating electromagnetic protection with thermal management for radar-infrared composite detection scenarios. In this work, accompanied by a high-temperature pyrolysis process, three-dimensional conductive network Fe 3 C/C-SiCN (3D Fe 3 C/C-SiCN) composite fibers with microwave absorption and low infrared emissivity were designed and prepared via the electrospinning technique. The Fe 3 C/C-SiCN fibers achieve broadband absorption and low infrared emissivity, an integrated advantage distinguishing them from traditional single-function materials. Microwave absorption and low infrared emissivity by precisely controlling the carbonization temperature, achieving a reflection loss (RL) of −25.11 dB at 1.58 mm, an effective absorption bandwidth (EAB) of 4.72 GHz, and stable long-wave infrared (LWIR) emissivity of 0.51 (at 50 °C) in 8–14 μm with a loading of 30% under a temperature of 700 °C. The synergistic effects of Fe 3 C-induced magnetic and interfacial polarization losses, the conductive SiCN-derived carbon network, and the thermally insulating 3D porous structure with low LWIR emissivity result in outstanding multifunctional performance. Fe 3 C/C-SiCN composite fibers would hold significant importance in the fields of electromagnetic protection, offering a novel solution for multifunctional electromagnetic protection beyond conventional single-band absorbers.
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）