RSC Advances
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2022
·Vol. 12
·期 13
·7935-7940
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IF 4.036
Aoping Guo,Xiaobao Zhang,Baiyi Shao,Song Sang,Xiaojing Yang
We report an environmentally friendly strategy for the synthesis of Fe3C/Fe/graphitic carbon based on hydrothermal carbonization and graphitization of carbon spheres with potassium ferrate (K2FeO4) at 800 °C. The obtained sample consisting of Fe3C/Fe nanoparticles and graphitic carbon (FC-1-8) delivered an enhanced pseudocapacitance of 428.0 F g−1 at a current density of 1 A g−1. After removal of the Fe3C/Fe electroactive materials, the graphitic carbon (FC-1-8-HCl) possessed a large specific surface area (SSA) up to 2813.6 m2 g−1 with a capacity of 243.3 F g−1 at 1 A g−1, far outweighing the other amorphous carbon electrodes of FC-0-8 (carbon spheres annealed at 800 °C without the treatment of K2FeO4). The graphitic material with a porous structure could offer more electroactive sites and improved conductivity of the sample. This method provided guidelines for the synthesis of superior performance supercapacitors with synchronous graphitic carbon and electroactive species.
研究领域:
材料科学
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能源存储
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PubMed
高影响因子
DIAMOND AND RELATED MATERIALS
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2024
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IF 4.3
Shijiang Feng,Rong Qiang,Yulong Shao,Xiao Yang,Rui Xue,Qian Ma,Fangjie Ren,Yuancheng Ding,Xu Wu,Lei Rong,Jingbo Fang,Caihong Chen,Yiheng Zhang
The rapid development of communication technology has led to severe microwave pollution, which presents a challenge for microwave-absorbing composites. Current research suggests achieving superior microwave absorption requires the use of multi-component operation and ingenious structural design. Consequently, the present study has prepared continuous porous carbon (CPC) materials doped with large amounts of Fe 3 C/Fe nanoparticles (Fe@CPC) using carbonization and acid etching. By balancing the advantages of the above strategies, it is possible to address issues such as poor impedance match, single loss capacity, easy oxidation of magnetic metals/alloys, and the limited absorption bandwidth of conventional absorbing materials at the same time. The material exhibits a minimum reflection loss of −23.2 dB with an efficient absorption range of 5.3 GHz at 1.9 mm at a filler content of just 10 wt% in the paraffin matrix. In this paper, the samples with a continuous porous structure were prepared by a simple method, and the properties were excellent due to the appropriate preparation method and the synergistic effect of the multi-component composite. The porous structure facilitates the presence of a considerable number of active sites, which enables the loading of a substantial quantity of metal ions. Furthermore, nanoparticles are capable of aggregating and dispersing on the surface. This paper presents a theoretical framework for understanding the synergistic effect of microwave radiation through interfacial polarization and micro-scale magnetic interaction. Nevertheless, there are still obstacles to overcome in terms of achieving precise control over the structural design and ensuring the compatible integration of metal components.
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
DIAMOND AND RELATED MATERIALS
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2023
·
IF 4.1
Yi Chen,Rong Qiang,Yulong Shao,Xiao Yang,Qian Ma,Rui Xue,Bowen Chen,Shijiang Feng,Fangjie Ren,Yuancheng Ding,Lijuan Sun,Zheng Guo,Zishuo Ma,Zihan Liu,Xinyu Chen
Porous carbon materials typically exhibit excellent microwave absorption performance and lightweight characteristics, providing a positive significance for controlling the composites weight. This work employed a one-step method, and in situ growth techniques to fabricate a foam-structure Fe 3 C/Fe/C with a density of only 0.142 g/cm 3 . The carbon skeleton encapsulates Fe 3 C/Fe nanoparticles to slow down its oxidation in the natural environment. Remarkably, the Fe 3 C/Fe/C composite achieves an impressive effective bandwidth of 5.73 GHz with a 2.2 mm thickness and only 10 wt% filling ratio. The outstanding performance can be ascribed to the enhanced interfacial polarization caused by high porosity. Additional nitrogen doping provides active sites to enhance dipole polarization. Additionally, after in-depth analysis of the various magnetic loss mechanisms present in Fe 3 C/Fe/C, we have revealed the promotion of introducing magnetic nanoparticles on the microwave absorption performance of foam-like carbon. This work provides an effective reference for reducing the weight of microwave absorbers, simplifying preparation methods, and understanding the mechanisms of magnetic nanoparticles in foam-like carbon.
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
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Yuning Wang,Wenrui Yao,Zehuai Li,Haiyan Tan,Ce Sun,Dingyuan Zheng,Yanhua Zhang
The extensive use of organic dyes has led to significant water pollution. Using lignocellulosic waste as a precursor for catalysts preparation for sewage remediation presents an effective alternative with numerous advantages in sustainability, cost-effectiveness, and environmental compatibility. In this work, wood fiber waste collected from wood processing plants was decorated with Prussian blue (PB) and then annealed to produce carbonized wood fiber catalyst (Fe 3 C@Fe-CB). In the presence of peroxymonosulfate (PMS), the prepared catalyst could achieve over 98.69 % efficiency in degrading methylene blue (MB) solutions (20 mg/L) in 60 min across a pH range of 3 to 11. Electrochemical test and electron paramagnetic resonance (EPR) analysis respectively verified that electron transfer pathway and radical pathway were the key factors for the degradation of MB. Cyclic degradation tests demonstrated that the degradation efficiency remained above 93.67 % after five recycling experiments. Moreover, the used magnetic catalyst can be easily recycled by magnet. This study proposed a facile and sustainable carbonized wood fiber catalyst decorated by Fe 3 C@Fe-CB, which could realize efficient elimination of organic dyes. Moreover, we offered a novel choice for dyes-polluted water treatment and paving a new route for converting low-value lignocellulosic waste to high-value utilizations.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2020
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IF 3.807
Xiaoying Zhai,Weiguo Lin,Jinkai Liu,Xu Chen,Junfeng Yong,Wensheng Yang
The development of earth-abundant electrocatalysts to replace noble metal for oxygen reduction reaction (ORR) has attracts tremendous interest. In this work, Fe, N-codoped porous carbon-embedded Fe 3 C nanoparticles (Fe 3 C/Fe, N-PCR) is fabricated from petroleum vacuum residue via a simple template-assisted and subsequent doping-assisted calcination method. The unique hybrid material shows great features: abundant active sites including pyridinic N, Fe N, and Fe 3 C nanoparticles, a relatively large surface area (509.3 m 2 g − 1 ) and 3D interconnected hierarchical porous structure. The Fe 3 C/Fe, N-PCR as an electrocatalyst exhibits remarkable ORR catalytic activity in alkaline medium, with a high onset potential of 1.02 V and half-wave potential of 0.86 V, which surpass commercial Pt/C (20 wt%) by ca. 30 and 20 mV, respectively. Moreover, Fe 3 C/Fe, N-PCR has outstanding long-term stability and tolerance to methanol poisoning, outperforming Pt/C. Combining with the exciting performance, abundant and cheap raw material, and facile synthetic method, Fe 3 C/Fe, N-PCR catalyst has promising future in ORR. This study also provides a new approach for high value utilization of petroleum vacuum residue.
研究领域:
材料科学
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化学
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DOI
高影响因子
CHEMOSPHERE
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2023
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IF 8.8
Jie Li,Hua Yin,Haoyu Luo,Yingchao Li,Xufa Rong,Zhi Dang
Polychlorinated biphenyls (PCBs) degradation by peroxymonosulfate (PMS) activation through •OH and SO 4 •– radical oxidation process was the effective technology in the last decades; however, there were few research focusing on removing PCBs by O 2 •– and 1 O 2 induced by PMS activation. In this work, 90.86% of 2,4,4-trichlorodiphenyl (PCB 28) was degraded by 0.3 g/L Fe 3 C@Fe-800 activated 0.5 mM PMS system under the synergistic action of O 2 •– and 1 O 2 . The structures of Fe 3 C@Fe-800 were identified by Scanning electron microscope (SEM), High resolution-transmission electron microscopy (HR-TEM), X-ray photoelectron spectroscopy (XPS), Brunauer-Emmett-Teller (BET), Raman spectra and Fourier transform infrared (FT-IR) spectra. Electron paramagnetic resonance (EPR) measurements and quenching tests verified that O 2 •– and 1 O 2 were the primary reactive species in Fe 3 C@Fe-800/PMS/PCB 28 ternary reaction system. Density functional theory (DFT), Linear sweep voltammetry (LSV), and chronoamperometry test revealed that electron-deficient Fe atoms on Fe 3 C were the main active sites in Fe 3 C@Fe-800 for PMS activation to generate 1 O 2 . Unlike the reported •OH and SO 4 •– mediated degradation induced by the iron-based catalyst, both O 2 •– and 1 O 2 contributed to PCB 28 degradation： nucleophilic dichlorination reaction by O 2 •- and then ring-open oxidation process by 1 O 2 . Fe 3 C@Fe-800/PMS system had excellent catalytic performance under different reaction conditions and possessed desirable inorganic salt and natural organic matter resistance. This work elucidated the important role of Fe 3 C in PMS activation to generate O 2 •- and 1 O 2 for PCB 28 decontamination by nonradical way and provided a clue to design rationally catalysts in polychlorinated biphenyl pollution remediation.
研究领域:
环境科学
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化学工程
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PubMed
高影响因子
ELECTROCHIMICA ACTA
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2024
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IF 5.5
Ke Qu,Yuhang Qiu,Miao Deng
Conforming to the principles of green chemistry and sustainable environmental progress, this work demonstrated the concept of “treating waste with waste”, i.e. treating atmospheric pollutant sulfur dioxide (SO 2 ) with agricultural waste of tangerine peel. SO 2 electro-catalytic oxidation is the key technique in this endeavor, which utilizes SO 2 as reaction raw material in the anode to remove it. The anodic SO 2 electro-catalytic oxidation could be coupled to the cathodic hydrogen evolution to achieve the simultaneous SO 2 removal and hydrogen production. Anodic catalyst plays a vital role in this SO 2 transformation. In this work, tangerine peel has been re-utilized to afford tangerine peel-derived biochar (TPB) to prepare TPB/CNT-derived Fe 3 C/Fe/C (N-doped) as a capable anodic catalyst to achieve this goal. With help of various characterization techniques and electrochemical testing, the optimal iron mass fraction and pyrolysis temperature were found to be 16 wt% Fe under 800 °C, with carboxylated carbon nanotube as carbon additive. Transmission electron microscopy (TEM) image showed that the as-prepared TPB/CNT-derived Fe 3 C/Fe/C (N-doped) featured a unique morphology to encapsulate Fe 3 C/Fe with a layer of protecting carbon, which should contribute to the enhanced electro-catalytic performances. A flow electrolyzer was also assembled to illustrate practical application of the anodic catalyst in the real scenario. Owing to its lower cost, the as-prepared TPB/CNT-derived Fe 3 C/Fe/C (N-doped) will be advantageous to replace precious metals to mediate SO 2 electro-catalytic oxidation as one of promising environmental treatment techniques in the future.
研究领域:
环境科学
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材料科学
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化学工程
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可持续化学
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DOI
高影响因子
Journal of Materials Chemistry B
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2022
·Vol. 10
·期 17
·3311-3319
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IF 7.571
Rui Li,Xiaohong Qiao,Huijun Ma,Hanmei Li,Cong Li,Lihua Jin
In this work, we reported new Fe3C embedded Fe–N-doped carbon nanomaterials (Fe3C@Fe–N-CMs) generated in situ by the facile pyrolysis of Fe–Zn ZIF precursors. The resulting Fe3C@Fe–N-CMs were equipped with several desirable nanozyme features, including multiple efficient intrinsic active sites (i.e. Fe–Nx, Fe3C@C, and C–N moieties), large specific surface area and abundant mesoporous structures. As a result, these Fe3C@Fe–N-CMs displayed exceptional ability to mimic three enzymes: peroxidase, catalase and oxidase, while the Fe3C@Fe–N-CMs pyrolyzed at 800 °C, named CMs-800, showed the best enzyme-like properties. After systematically investigating the catalytic mechanism, we further explored the application of the oxidase-like properties of CMs-800 in the detection of the total antioxidant capacity (TAC) in beverages and tablets. This study not only provided a new approach to construct multifunctional carbon-based nanozymes, but also expanded the application of carbon nanozymes in the field of food quality and safety.
研究领域:
材料科学
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生物化学
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食品安全
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PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2022
·
IF 7.968
Haoyang Wu,Zhilong Tan,Bin Miao,Hailong Hu,Sanying Hou
In this work, Fe, N co-doped hierarchical porous graphite-like carbon with carbon-encapsulated Fe/Fe 3 C@ Fe-N-C was synthesized by a facile solid-phase synthesis strategy, and was employed as an efficient catalyst to activate peroxymonosulfate (PMS) for oxidation of tetracycline (TC). The optimal Fe-N/C 800 outlined a highly catalytic performance in activating peroxymonosulfate (PMS) with TC decomposition rate reaching 89.2 % in 20 min at ultra-low catalyst dosage. Meanwhile, the effect of operating parameters was also investigated in order to evaluate the potential of using Fe-N/C 800 in practical applications. In addition, the characterization analysis and experiments results elucidated that graphitic N, pyridinic N, C O, Fe 3 C, Fe 0 and FeN 4 were considered as the main reactive species promoting the PMS activation to generate reactive oxygen species (ROS) (including singlet oxygen ( 1 O 2 ), sulfate radical (SO 4 •- ) and hydroxyl radical (•OH)). The electron paramagnetic resonance (EPR) experiments and radicals quenching analyses further demonstrated that the non-radical species singlet oxygen ( 1 O 2 ) was the dominant reactive oxygen species. Moreover, the TC degradation pathways were presented by LC-MS. Ultimately, the toxicity of the intermediate products were also investigated by ECOSAR system.
研究领域:
环境科学
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材料科学
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催化化学
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2026
·
IF 2.6
Chenxi Zhang,Fangke Zhou,Yuyijian Zhao,Siyu Wang,Shihan Huang,Qin Zhao,Di Lan,Xiaoming Guo,Yijin Ren,Bo Liang
The development of high-performance electromagnetic wave absorbing materials has become crucial for addressing electromagnetic pollution. This study reports a facile in situ ion exchange strategy followed by pyrolysis for the successful preparation of N-doped porous carbon foam embedded with uniformly dispersed magnetic Fe3C/Fe nanoparticles (Fe3C/Fe@NPCF). The strong coordination between carboxyl groups on the polyamic acid (PAA) chains and Fe3+ ions effectively prevents the agglomeration of magnetic particles during high-temperature treatment and achieves their high dispersion within the carbon matrix. The effects of carbonization temperature on the microstructure, electromagnetic parameters, and microwave absorption properties were systematically investigated. The results demonstrate that the Fe3C/Fe@NPCF-800 composite exhibits exceptional microwave absorption performance with a minimum reflection loss (RLmin) of −30.19 dB at a minimal thickness of only 2.0 mm and an ultra-wide effective absorption bandwidth (EAB) of 6.48 GHz. This outstanding performance originates from the introduction of magnetic components that optimize impedance matching, allowing electromagnetic waves to be effectively attenuated. This work not only provides a high-performance absorbing material but also offers a novel design strategy and fabrication method for developing lightweight absorbers with both strong absorption capability and broad bandwidth.
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高影响因子
ACS Applied Materials & Interfaces
·
2026
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IF 7.8
Yuke Zheng,Yidan He,Zhiqi Zhang,Jinglin Zhang,Tong Wang,Bo Wang,Tianying Wang,Xiaojuan Zhang
To suppress the ever-increasing challenge of electromagnetic radiation pollution and exploit lightweight wave absorbers, enormous attention has been focused on aerogels. Herein, a sequence of Fe3C/Fe/NC aerogels with variable dielectric/magnetic ratios has been successfully synthesized by redox reaction, freeze-drying, and high-temperature calcination. Benefiting from the dielectric-magnetic coupling loss, optimized impedance matching, and structural advantages, the Fe3C/Fe/NC-2/PVDF composite displays optimal microwave absorption performance with a minimum reflection loss (RLmin) value of −59.03 dB at 2.53 mm under an ultralow filler loading of 3 wt %. Meanwhile, the maximum effective absorption bandwidth (EAB) of Fe3C/Fe/NC-3/PVDF composite nearly covers the entire X-band at 2.92 mm. Moreover, the radar cross-section (RCS) simulation results and infrared thermal images respectivelly verify their application potential in radar wave attenuation and the infrared stealth domain. The specific wave absorption mechanism is mainly ascribed to dielectric loss, including conduction loss and polarization loss, magnetic loss containing eddy current loss and exchange resonance, as well as multiple reflections and scattering caused by the porous structure. This study can effectively decouple the impedance matching and microwave dissipating ability by dielectric/magnetic ratio modulation and microstructure design, which is of great significance for the development of lightweight and advanced wave absorbers.
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高影响因子
Small
·
2019
·Vol. 16
·期 6
·1906057
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IF 10.856
Xueping Sun,Peng Wei,Songqi Gu,Jinxu Zhang,Zheng Jiang,Jing Wan,Zhaoyang Chen,Li Huang,Yue Xu,Chun Fang,Qing Li,Jiantao Han,Yunhui Huang
Highly active and durable bifunctional oxygen electrocatalysts are of pivotal importance for clean and renewable energy conversion devices, but the lack of earth-abundant electrocatalysts to improve the intrinsic sluggish kinetic process of oxygen reduction/evolution reactions (ORR/OER) is still a challenge. Fe-N-C catalysts with abundant natural merits are considered as promising alternatives to noble-based catalysts, yet further improvements are urgently needed because of their poor stability and unclear catalytic mechanism. Here, an atomic-level Fe-N-C electrocatalyst coupled with low crystalline Fe 3 C-Fe nanocomposite in 3D carbon matrix (Fe-SAs/Fe 3 C-Fe@NC) is fabricated by a facile and scalable method. Versus atomically FeN x species and crystallized Fe 3 C-Fe nanoparticles, Fe-SAs/Fe 3 C-Fe@NC catalyst, abundant in vertical branched carbon nanotubes decorated on intertwined carbon nanofibers, exhibits high electrocatalytic activities and excellent stabilities both in ORR ( E 1/2 , 0.927 V) and OER ( E J=10 , 1.57 V). This performance benefits from the strong synergistic effects of multicomponents and the unique structural advantages. In-depth X-ray absorption fine structure analysis and density functional theory calculation further demonstrate that more extra charges derived from modified Fe clusters decisively promote the ORR/OER performance for atomically FeN 4 configurations by enhanced oxygen adsorption energy. These insightful findings inspire new perspectives for the rational design and synthesis of economical–practical bifunctional oxygen electrocatalysts.
研究领域:
材料科学
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电化学
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能源转换技术
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）