CARBON
·
2019
·
IF 7.466
Haiying Wang,Yingjie He,Liyuan Chai,Huang Lei,Weichun Yang,Lanjing Hou,Tao Yuan,Linfeng Jin,Chong-Jian Tang,Jian Luo
Capacitive deionization (CDI) is increasingly being considered as an effective solution for treating heavy-metal contaminated water. Surface modification of electrode materials with metal oxides is the key to yield high specific capacitance of transition metal oxides for enhancing the efficiency of CDI processes. In this study, we proposed a simple and effective strategy to produce a new, well-ordered Fe 2 O 3 @C composite for Pb 2+ removal via CDI technology. Through controlling hydrofluoric acid-inducing solvothermal carbonization , Fe 2 O 3 dots were highly dispersed in carbonized substrates without using traditional high-temperature calcination . The products possessed regular octahedral morphology with a uniform distribution of α-Fe 2 O 3 in nearly quantum scale (∼20 nm) throughout the carbon matrixes. Compared with other similar materials, the well-dispersed Fe 2 O 3 in carbon matrixes significantly increased the surface areas (∼1832 m 2 g −1 ) and specific capacitance (115.6 F g −1 ) of Fe 2 O 3 @C composites. Using the composites as electrodes, the Pb 2+ adsorption capacity reached 830.17 mg g −1 , which is 28% higher than reported materials. Furthermore, the composites electrode possess a high regeneration efficiency, after 10 cycles, 90.3% of the initial performance is still retained. Our study demonstrated great potential of the novel Fe 2 O 3 @C composites for the removal of heavy metal ions using CDI processes.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2017
·
IF 2.594
Maiyong Zhu,Jiarui Kan,Jianmei Pan,Wenjie Tong,Qi Chen,Jiacheng Wang,Songjun Li
A facile hydrothermal method was developed for the preparation of Fe 2 O 3 @C nanocomposites using FeCl 3 •6H 2 O as iron source and glucose as carbon source under alkaline condition. The morphology and structure of the as-prepared product were identified by transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM), field-emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), Raman spectroscopy, Fourier Transform infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA). The as-prepare α-Fe 2 O 3 @C nanocomposites were employed for supercapacitor electrode material. The synergistic combination of carbon electrical double-layer capacitance and α-Fe 2 O 3 pseudo-capacitance established such nanocomposites as versatile platform for high performance supercapacitors . The synthesis method developed here is expected to obtain other metal oxide/carbon composite.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Chuanqi Li,Hang Su,Kai Zhang,Zhongyi Liu,Hongqiang Wang,Dan Li
Although Fe 2 O 3 is a promising anode material in terms of high capacity, especially, abundance and environmentally friendly, its developments are impeded by the inevitable volume change during electrochemical reactions . Engineering novel nanostructure is an effective approach to maximize the potential in electrochemical properties of Fe 2 O 3 . Herein, urchin-like Fe 2 O 3 @C composite driven from FeOOH has been successfully synthesized by a facile and mild hydrothermal method followed by carbon coating and annealing treatment. Thanks to the synergetic effect by unique structure with rich exposed active sites and high surface area, as well as the complete carbon coating, the Fe 2 O 3 @C composite exhibited excellent rate capability and cycling performance, delivering a significant capacity 267.2 mA h g −1 at a high current density of 5 A g −1 and more than 430 mA h g −1 after 200 cycles at 0.2 A g −1 .
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2025
·
IF 4.5
Jiao Liu,Jinhu Hu,Xukang Han,Zhenyu Sheng,Yonglei Chi,Fangjiang Chi,Mingliang Ma
The rapid expansion of 5 G technology and the proliferation of electronic devices have exacerbated electromagnetic radiation pollution of urban building space and pose significant risks to human health, necessitating the development of efficient electromagnetic wave (EMW) absorbing materials for use in buildings to address this challenge. Carbon nanotubes (CNT) and magnetic materials such as Fe are widely used in this field due to their unique electromagnetic properties. In this study, γ-Fe 2 O 3 /C/CNT magnetic nanofibers were successfully prepared, exhibiting synergistic di-electric and magnetic capabilities through electrospinning and mechanical blending methods. Compared to γ-Fe 2 O 3 /C fibers and CNT, the CNT-modified composite material exhibited superior EMW absorption performance. At a low loading of 15 wt %, the γ-Fe 2 O 3 /C/CNT composite fibers achieved a minimum reflection loss (RL min ) of -78.89 dB (2.61 mm) and an effective absorption bandwidth (EAB) of 4.12 GHz (1.52 mm, 13.6-17.72 GHz). The superior EMW absorbing performance is primarily attributed to the three-dimensional network structure created by the intertwined nanofibers and CNT, through the synergy of two one-dimensional structures, which achieved good impedance matching and multiple loss mechanisms. As high-efficiency absorbing agents, γ-Fe 2 O 3 /C/CNT magnetic nanocomposite fibers have broad application prospects, serving as low-loading polymer coatings and cement-based materials absorbent to absorb radiation from electronic devices within buildings, reducing indoor electromagnetic pollution, and they can also be used in the field of military stealth. This work provides new insights into the development of efficient EMW absorbing materials.
研究领域:
材料科学
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环境科学
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电磁学
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale Research Letters
·
2018
·Vol. 13
·期 1
·1-8
·
IF 3.125
Wang Zhifeng,Zhang Xiaomin,Zhao Yan,Li Meixian,Tan Taizhe,Tan Minghui,Zhao Zeren,Ke Chengzhi,Qin Chunling,Chen Zhihong,Wang Yichao
Due to the severe volume expansion and poor cycle stability, transition metal oxide anode is still not meeting the commercial utilization. We herein demonstrate the synthetic method of core-shell pomegranate-shaped Fe 2 O 3 /C nano-composite via one-step hydrothermal process for the first time. The electrochemical performances were measured as anode material for Li-ion batteries. It exhibits excellent cycling performance, which sustains 705 mAh g −1 reversible capacities after 100 cycles at 100 mA g −1 . The anodes also showed good rate stability with discharge capacities of 480 mAh g −1 when cycling at a rate of 2000 mA g −1 . The excellent Li storage properties can be attributed to the unique core-shell pomegranate structure, which can not only ensure good electrical conductivity for active Fe 2 O 3 , but also accommodate huge volume change during cycles as well as facilitate the fast diffusion of Li ion.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
STARCH-STARKE
·
2017
·
IF 1.837
Linjing Su,Yuhao Xiong,Mei Wu,Zhenhua Duan,Zhi Zhang,Wei Xie,Dongjian Zhu,Yanghe Luo,Xingcun He
Researchers remain attracted to the development of more efficient and cost-effective materials for the degradation of organic dyes in wastewater. Ultra-small (sub-5 nm) Fe 2 O 3 nanocrystals embedding magnetic porous carbon, referred to as Fe 2 O 3 @C, in which starch is used as a carbon source, is demonstrated, and is synthesized by a facile microwave-enhanced high-temperature ionothermal method within 4 min. The Fe 2 O 3 @C obtained is used as a peroxidase-mimicking catalyst in heterogeneous Fenton-like reactions to degrade organic dyes (i.e., methylene blue) with aid from the green oxidant, hydrogen peroxide. Because of its unique structure and high specific surface area, Fe 2 O 3 @C displays enhanced treatment properties in the degradation of methylene blue. Moreover, Fe 2 O 3 @C demonstrates stability and resistance to a broad range of pH, recyclability, and convenient separation. This promising peroxidase-mimicking composite material may have potential applications in degradation of organic pollutants in the environmental cleaning field.
研究领域:
环境科学
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材料科学
·
生物催化
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Shouyu Ren,Qian Chen,Yuxin Jin,Xiaohui Liang,Cao Wu,Yu Zhang,Zengming Man,Zhou Chen
Diverse phases of Fe2O3 manifest distinct physical and chemical attributes. Herein, Fe2O3 and Fe2O3@C dodecahedrons with the yolk-shell structure were prepared by controllable pyrolysis of MIL-88 MOFs with different processes. The corresponding pyrolytic stages in air were proposed, followed closely via a similar self-oxidation/reduction procedure in the N2 atmosphere. In terms of microwave absorption performance, the hollow α-Fe2O3@C nanocomposites with the yolk-shell structure could facilitate the dielectric loss, and the interfaces between α-Fe2O3 and C promote the dissipation of an electromagnetic wave, which improve electromagnetic attenuation capability and enrich the loss mechanism of Fe2O3 collaboratively. Due to its carbon-coated hollow structure, αγ-Fe2O3@C nanocomposites calcinated at 400 °C exhibit the best ability for electromagnetic energy conversion. The device has a matching thickness of 2.25 mm, an effective absorption bandwidth of 11.2 to 15.64 GHz, and a total width of 4.44 GHz. Its highest reflection loss (RL) is −52 dB at 8.6 GHz (X band). In the range of −80 < θ < 80, the maximum radar cross section (RCS) reduction of α-Fe2O3@C is greater than 20 dB m2. A great deal of attention has been paid to theoretical simulations of RCS because of its reasonable composition and low-cost features. This work breaks ground for fabricating a MIL-88-derived electromagnetic wave absorber via the enlightenment of RCS simulations.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2016
·Vol. 7
·期 1
·336-343
·
IF 3.289
Tao Chen,Yuhao Xiong,Yuemei Qin,Haiguan Yang,Peng Zhang,Fanggui Ye
In this study, a novel and low-cost method was developed for synthesizing magnetic porous γ-Fe2O3/C as an adsorbent and catalyst for removal of methylene blue (MB) from aqueous solution. Using FeCl3·6H2O and bagasse as the precursor, the biomass-based material was synthesized rapidly using a microwave heating process. Fe ions were introduced to achieve both adsorption and catalytic degradation by the Fenton reaction. Characterization by BET, XRD, SEM, and TEM indicated that the prepared γ-Fe2O3/C material exhibited homogeneous mesoporosity with a BET surface area, mesoporous volume, and saturation magnetization of 764.116 m2 g−1, 0.54 cm3 g−1, and 17.1 emu g−1, respectively. The material exhibited excellent adsorption and catalytic degradation abilities for removal of MB from aqueous solution (up to 352.96 mg g−1), with complete degradation of MB within 30 min. Moreover, γ-Fe2O3/C had good stability over 5 cycles. Therefore, this biomass-based γ-Fe2O3/C material can be used as a highly effective and low-cost adsorbent and catalyst and has great potential application in clean-up processes for environmental pollutants.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2014
·Vol. 5
·期 7
·5164-5172
·
IF 3.708
Yuhao Xiong,Fanggui Ye,Cong Zhang,Shufen Shen,Linjing Su,Shulin Zhao
A novel and inexpensive approach was adopted to develop magnetic porous γ-Fe2O3/C@HKUST-1 composites for the adsorption of dyes and heavy metal ions from aqueous solution. The γ-Fe2O3/C with unique functional groups present such as –OH and –NH2 was used as the support to directly grow HKUST-1 by a stepwise liquid-phase epitaxy process. The crystallographic, morphology, and magnetic properties as well as porosity of the as-synthesized γ-Fe2O3/C @HKUST-1 composites were carefully studied by XRD, SEM, TEM, XPS, TGA, and BET. The results indicated that the BET surface area, micropore volume, and saturation magnetization of the γ-Fe2O3/C @HKUST-1 are 993.4 m2 g−1, 0.69 cm3 g−1, and 12.6 emu g−1, respectively. In addition, a uniform distribution of ultrafine γ-Fe2O3 nanoparticles with an average diameter of 2–3 nm was observed in the γ-Fe2O3/C@HKUST-1 composites. Our results showed that methylene blue (MB) and Cr(VI) (used as a model for typical dye pollutants and heavy metal ions) are effectively removed from aqueous solutions by γ-Fe2O3/C@HKUST-1. The maximum adsorption capacities were 370.2 and 101.4 mg g−1 of adsorbent for MB and Cr(VI), respectively. Moreover, a removal efficiency of about 90% was retained after five cycles of consecutive adsorption–desorption. The adsorption kinetics data were well described by a pseudo-second-order model (R2 > 0.99), and equilibrium data were well fitted to the Langmuir isotherm model (R2 > 0.99). Finally, our results suggested that the γ-Fe2O3/C@HKUST-1 composites have a great potential to be employed for treatment of wastewater containing MB and Cr(VI).
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Longxin Wang,Yishan Wang,Dongdong Liu,Xuji Zhang,Guangwu Wen,Xueqian Zhang,Xiaoxiao Huang
In order to improve the weak dielectric loss capability and poor impedance matching of Fe 3 O 4 , the hexagonal plates of Fe 3 O 4 /Fe 2 O 3 /C nanocomposites were rationally constructed in this paper by utilizing electrostatic attraction and cross-linking, using polyacrylamide (PAM) as templating agent and viscosity modifier. The stacked hexagonal plates constructed a conductive network and utilized the structural properties of Fe 3 O 4 to promote the transfer and jump of free electrons, which effectively improved the conduction loss. The heterogeneous interface was effectively constructed due to the presence of Fe 2 O 3 and trace carbon, while the transfer and leap of free electrons promoted the generation of interfacial polarization, resulting in magnetoelectric coupling and effective improvement of polarization loss. The results show that the effective absorption broadband reaches 4.08 GHz when the matching thickness of the composite is 2 mm. A minimum reflection loss of −43.79 dB is realized at a matching thickness of 1 mm. The PAM modification proved to be an effective means to modulate the morphology and composition of the materials.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2023
·
IF 8.8
Yu-Han Sun,Liu Yang,Xian-Xian Ji,Yuan-Zhen Wang,Yu-Long Liu,Ying Fu,Fei Ye
Flusilazole is a triazole fungicide with residues that are potentially toxic to humans. It enters the human body mainly through food, although its bactericidal activity is substantial. In this study, an electrochemical sensor Fe/Fe 2 O 3 @C with a core–shell structure was constructed to efficiently detect flusilazole by annealing MIL-53(Fe) which was prepared by a simple solvothermal method. Transmission electron microscopy and scanning electron microscopy were used to characterize the apparent morphology of MIL-53(Fe) and Fe/Fe 2 O 3 @C , and their structures were further characterized by X-ray photoelectron spectroscopy, Raman spectroscopy, powder X-ray diffraction, and the mapping of elements by energy dispersive spectroscopy. The electrochemical behavior of Fe/Fe 2 O 3 @C in the detection of flusilazole was evaluated by differential pulse voltammetry under optimal conditions. The results of the study indicate that the Fe/Fe 2 O 3 @C electrochemical sensor displayed excellent detection capabilities for flusilazole, where the sensor exhibited a wide detection range from 1.00 × 10 −4 to 1.00 × 10 −12 mol/L with an incredibly low LOD of 593 fM, making it highly sensitive to trace amounts of flusilazole. Moreover, Fe/Fe 2 O 3 @C demonstrated superior reproducibility, stability, and resistance to interference, highlighting its reliability in practical applications. The sensor was also successfully utilized to quantitatively detect flusilazole in various real samples, which suggests that Fe/Fe 2 O 3 @C has broad-spectrum environmental resistance and can effectively and rapidly detect flusilazole residues in different types of food items and environmental matrices. The study also delved into the mechanism of Fe/Fe 2 O 3 @C for the detection of flusilazole, providing a deeper understanding of the functionality of this sensor. Overall, these findings emphasize the practical significance of Fe/Fe 2 O 3 @C as an electrochemical sensor, showcasing its potential for real-world applications in food safety and environmental monitoring.
研究领域:
分析化学
·
食品安全
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2021
·Vol. 12
·期 1
·1-9
·
IF 14.919
Wang Xiu-man,Tao Lu-qi,Yuan Min,Wang Ze-ping,Yu Jiabing,Xie Dingli,Luo Feng,Chen Xianping,Wong ChingPing
Sensitivity and pressure range are two significant parameters of pressure sensors. Existing pressure sensors have difficulty achieving both high sensitivity and a wide pressure range. Therefore, we propose a new pressure sensor with a ternary nanocomposite Fe 2 O 3 /C@SnO 2 . The sea urchin-like Fe 2 O 3 structure promotes signal transduction and protects Fe 2 O 3 needles from mechanical breaking, while the acetylene carbon black improves the conductivity of Fe 2 O 3 . Moreover, one part of the SnO 2 nanoparticles adheres to the surfaces of Fe 2 O 3 needles and forms Fe 2 O 3 /SnO 2 heterostructures, while its other part disperses into the carbon layer to form SnO 2 @C structure. Collectively, the synergistic effects of the three structures (Fe 2 O 3 /C, Fe 2 O 3 /SnO 2 and SnO 2 @C) improves on the limited pressure response range of a single structure. The experimental results demonstrate that the Fe 2 O 3 /C@SnO 2 pressure sensor exhibits high sensitivity (680 kPa −1 ), fast response (10 ms), broad range (up to 150 kPa), and good reproducibility (over 3500 cycles under a pressure of 110 kPa), implying that the new pressure sensor has wide application prospects especially in wearable electronic devices and health monitoring.
研究领域:
材料科学
·
电子工程
·
纳米技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）