ELECTROCHIMICA ACTA
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2025
·
IF 5.6
Shakeel Abbas,Tanveer Hussain Bokhari,Mudasir Abbas,Zahid Abbas,Atia Khalid,Saqib Javed,Amina Zafar,Naeem Ahmad,Shafqat Karim,Athar Javed,Ting Zhu,Amjad Nisar,Mashkoor Ahmad
Electrodes material and electrolytes play an important role in defining energy storage performance of supercapacitors. Therefore, the selection of suitable electrode material as well as electrolyte is very crucial. In this work, hematite α-Fe 2 O 3 nanoparticles supported rGO structure is synthesized by a low cost co-precipitation approach. The developed electrode is investigated for supercapacitor in 1.0 M KOH, Na 2 SO 4 and aqueous hybrid electrolyte. It is found that the fabricated (α-Fe 2 O 3 /rGO) electrode delivers an improved specific capacitance of 1272 F g −1 at 1 A g −1 in hybrid electrolyte as compare to 700 F g −1 for KOH and 978 F g −1 for Na 2 SO 4 electrolyte. Moreover, the electrode shows excellent cyclic stability in contrast to the pristine α-Fe2O3 electrode. Interestingly, the assembled prototype asymmetric coin cell supercapacitor (α-Fe 2 O 3 /rGO//AC) device achieved a specific capacitance of 152 F g −1 at 1 A g −1 and energy density of 47.1 Wh kg −1 at a power density of 245.5 W kg −1 . Moreover, the device keeps 94% capacitance retention up to 8,000 cycles at 6 A g −1 . The improved performance is attributing to the increase in conductivity and charge kinetics in hybrid electrolyte. It is suggested that α-Fe 2 O 3 /rGO structure is a useful material for supercapacitors in the presence of hybrid electrolyte.
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
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Wenyan Yin,Khaled Tawfik Alali,Milin Zhang,Jingyuan Liu,Dalei Song,Qi Liu,Jing Yu,Rongrong Chen,Hongsen Zhang,Jun Wang
Ionic liquids are widely employed as electrolytes for electrochemical oxygen sensing due to their excellent physical and chemical properties. Recently, combining inorganic electrochemically active materials with ionic liquids are becomes intensively interesting to improve oxygen sensor performance. In this paper, two imidazolyl-based ionic liquids 1-ethyl-2,3-dimethylimidazole bis((trifluoromethyl)sulfonyl)imide [Emmim][TFSI] and 1-butyl-2,3-dimethylimidazole bis((trifluoromethyl)sulfonyl)imide [Bmmim][TFSI] with three saturated alkyl substituents on the aromatic ring were prepared by a traditional two-step method. Under the electrochemical test, both ionic liquids exhibit a certain responsibility to different concentrations of oxygen. Subsequently, α-Fe 2 O 3 /rGO was prepared by hydrothermal method and then mixed with the ionic liquids to prepare a composite ionic liquid electrolyte for detecting a wide range of oxygen concentrations. The response performance of prepared composite electrolyte toward the oxygen is improved, which exhibits a sensitivity of 0.1041 μA/[%O 2 ] to gradually changed oxygen concentration and a linear correlation (R 2 ) of 0.9997 between oxygen reduction peak currents. Hence, the results show that the pure ionic liquid has a certain ability to detect oxygen, while adding α-Fe 2 O 3 /rGO compounds further improve responsibility, stability and sensitivity of composite electrolyte to oxygen.
研究领域:
材料科学
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电化学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Bingbing Hu,Chuanlan Xu,Muhammad Kashif Aslam,Yuan Cen,Jiahong Hu,Yan Li,Yuping Liu,Chaozhong Guo,Danmei Yu,Changguo Chen
In this work, multilayer networks lanthanum-doped V 2 O 5 · n H 2 O@OAB (noted as La-VOH@OAB) binder-free thin film positive electrode has been first successfully synthesized via a simple and economical sol-gel and drop-coating methods. Benefiting from its unique architecture and the favorable synergetic contributions for rare earth metal ions of La 3+ and hydrophilic carbon of OAB, after the condition optimization, the 20%La-VOH@OAB-4 exhibits an excellent electrochemical performance with an ultrahigh specific capacitance of 612 F g −1 at a current density of 1 A g −1 , good rate capability (81.1%, the current density increases tenfold) and outstanding cycling stability (90.4% capacitance retention over 2000 cycles). In addition, flexible Fe 2 O 3 @rGO binder-free thin film negative electrode prepared with the similarly facile strategy demonstrates a high specific capacitance of 366 F g −1 due to Fe 2 O 3 nanoparticles tightly anchored on the rGO surface. The assembled 20%La-VOH@OAB-4//Fe 2 O 3 @rGO ASCs device within a voltage window of 1.7 V delivers a relatively high specific energy density of 56.3 Wh kg −1 at a power density of 849.9 W kg −1 with exceptional cycling stability (81.3% capacitance retention after 5000 cycles), moreover, two ASCs devices in parallel can light up a red LED for 3 min, demonstrating its potential in practical applications. This work provides a certain reference for the fabrication of environmentally friendly thin film electrodes for developing high efficient energy storage systems.
研究领域:
材料科学
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能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
DIAMOND AND RELATED MATERIALS
·
2025
·
IF 5.1
Jun Liu,Jiayin Li,Yao Chen,Xin Tan,Chun Yang
The abnormal contain of uric acid (UA) and tryptophan (Trp) in body could cause the liver and kidney function decline. The simultaneous detection of UA and Trp for early prevention of these liver and kidney diseases is significant. This study had developed the α-Fe 2 O 3 /reduced graphene oxide (rGO) for modification of the glassy carbon electrode (GCE) in (UA) and (Trp) detection. α-Fe 2 O 3 /rGO composite was synthesized through hydrothermal-calcination method. The optimal electrochemical conditions, including the pH values, scan rate, and accumulative parameters, were discussed for demonstrating the feasibility. Moreover, this α-Fe 2 O 3 /rGO/GCE presented wide linear relationships (0.01–900 μM) and low detection limits (UA (3.56 nM) and Trp (16.4 nM)). The DFT theoretical calculation revealed that the enhanced performance is mainly due to the high electrocatalytic property of α-Fe 2 O 3 nanotube, high conductivity of rGO, and interaction effect between target biomolecule and modified electrode surface. Finally, the approving results were also acquired in detection of practical UA and Trp samples by α-Fe 2 O 3 /rGO modified GCE. The results indicate that α-Fe 2 O 3 /rGO could provide a new and highly advantageous approach for detection of UA and Trp.
研究领域:
生物医学工程
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
·
IF 5.316
Shuai Wang,Changhao Yao,Yifeng Cai,Yang Yang,Huiyuan Ma,Baojiang Jiang,Jun Ma
In this study, α-Fe 2 O 3 /rGO was smoothly synthesized by a one-step method and employed to activate persulfate (PS) for the degradation of Bisphenol A (BPA) under sunlight. During the degradation experiment, the degradation rates of BPA for PS, α-Fe 2 O 3 /8% rGO, and α-Fe 2 O 3 /8% rGO/PS were 6.6%, 47.6%, and 99.1%, respectively, indicating that the introduction of α-Fe 2 O 3 /rGO and PS significantly enhanced the photocatalytic efficiency because that photocatalytic process and PS activation coupling system not only inhibited the recombination of photo-induced carrier pairs, but also reduced the energy consumption of PS activation. Moreover, electron spin resonance spectroscopy (ESR) and trapping experiments were utilized to explore the active species generated during the reaction. The results showed that •OH and •SO 4 2- were the principal oxidative species in this reaction system. These results showed that Fe-loaded rGO has great potential for activating PS to decompose pollutants in water.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS LETTERS
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2021
·
IF 3.423
Wenbo Liu,Jiabin Zhou,Dan Liu,Su Liu,Xianjie Liu
Accelerating electron transfer can improve the catalytic performance. MIL-88/Go composites were synthesized by hydrothermal method using the oxygen-containing functional group of graphene oxide (GO) as the MIL-88 unit cell nucleus. Fe 2 O 3 /rGO composites with small particle size were prepared by roasting of MIL-88/GO. It has high degradation efficiency (99%) and good recycling performance for tetracycline hydrochloride (TC-HCl) in photo-Fenton system. The combination of oxygen vacancies produced by roasting MIL-88 and the conductivity of reduced graphene oxide (rGO) improves the rate of electron transfer. The efficient electron transfer promotes the formation of OH and O 2 − and thus improve the catalytic activity.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2020
·
IF 6.182
Tiancheng Na,Yang Liu,Xiangcun Li,Wenji Zheng,Yan Dai,Zhijun Yan,Wei Kou,Gaohong He
We report a method based on 2,4-dihydroxybenzoic acid-formaldehyde (RF-COOH) microsphere hard templates to prepare core-shelled Fe 2 O 3 microspheres , which were then added to graphene oxide to obtain hierarchical reduced graphene oxide, ultimately dropping Fe 2 O 3 (Fe 2 O 3 @rGO) by Vitamin C reduction and freeze drying. When used as cathode materials for lithium-sulfur batteries, Fe 2 O 3 @rGO shows a high specific capacity of 400.5 mAh g −1 at 2 C after 500 cycles. The prominent performance is due to the collaborative assembly of rGO , which provides stable structural support and favourable conductivity, and core-shelled Fe 2 O 3 microspheres, which are certified to have a strong interaction with polysulfides. The loose and stable skeletons of highly electroconductive rGO can offer a conductive framework for rapid ion/electron transport. Meanwhile, the unique core-shelled structure of Fe 2 O 3 with the ample void space can anchor polysulfides through the strong chemical adsorption and buffer the mechanical stresses caused by volume expansion during the charge and discharge processes. Moreover, Fe 2 O 3 promotes the transformation of polysulfides to insoluble LiPSs during the discharging process, effectively alleviating the shuttling of the polysulfides.
研究领域:
材料科学
·
能源存储
·
电化学
✓ 已验证
DOI
高影响因子
ACS Nano
·
2018
·
IF 13.709
Jun Li,Qi Pei,Ruyi Wang,Yong Zhou,Zhengming Zhang,Qingqi Cao,Dunhui Wang,Wenbo Mi,Youwei Du
The promotion of magnetic field on catalytic performance has attracted extensive attention for a long time, and substantial improvements have been achieved in some catalysis fields. However, because the Zeeman energy is several orders of magnitude weaker, magnetic field seems unable to alter the band structure and has a negligible effect on semiconductor photocatalytic performance, which makes this task a great challenge. On the other hand, the spin-related behavior usually plays an important role in determining catalytic performance. For example, in some molecular catalysis, such as photosystem II, ferromagnetic alignment of the active material results in spin-oriented electrons, which are selected and accumulated at the interface, leading to great promotion of the oxygen evolution reaction activity. Here, we propose a magnetoresistance-related strategy to boost the carrier transfer efficiency and apply it in α-Fe2O3/reduced graphene oxide hybrid nanostructures (α-Fe2O3/rGO) to improve the photocatalytic performance under magnetic field. We show that both the degradation rate constant and photocurrent density of α-Fe2O3/rGO can be dramatically enhanced with the application of magnetic field, indicating the promotion of the photocatalytic performance.
研究领域:
材料科学
·
催化化学
·
物理化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2016
·
IF 2.758
Xingbin Lv,Yanfang Zhu,Tao Yang,Hualian Zhang,Xinghong Cui,Hairong Yue,Daijun Liu,Jianjun Chen,Junyi Ji
Fe 2 O 3 @rGO nanostructures with different Fe 2 O 3 morphologies (nanoplates and nanoparticles) have been successfully fabricated by a simple and novel liquid-solid-solution (LSS) hydrothermal method . The Fe 2 O 3 @rGO composites with different morphologies and sizes were obtained at the oil/water interface by simply adjusting the concentration of Fe 2+ ions and GO solution. Through the in situ solvothermal crystalization and growth process, Fe 2 O 3 can be uniformly anchored on the crumpled graphene sheets without aggregation. When acting as lithium ion battery anodes, the Fe 2 O 3 @rGO composite can deliver a reversible capacity of 1207 mA h g −1 at 0.2 A g −1 after 60 cycles, and a high rate capability of 548 mA h g −1 even under a high current density of 12.8 A g −1 (corresponds to a charge time of ~150 s). The high electrochemical performance indicates this synthesis technique may be a promising route to produce advanced anode materials for high-end lithium ion batteries.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
IONICS
·
2025
·
IF 2.6
Chen Shi,Xu Yong,Ye Mingfu,Wang Mingyue,Wang Wenhai,Wu Konglin
Epinephrine (EP) is a crucial hormone secreted by adrenal, and its secretion and transmission are closely associated with various health conditions. Therefore, developing advanced EP detection methods is of great importance. Herein, an innovative electrochemical sensor has been successfully established based on the Fe 2 O 3 and reduced graphene oxide (Fe 2 O 3 –rGO) nanocomposite. Benefiting from the vast specific surface area of Fe 2 O 3 and the high conductivity of rGO, the Fe 2 O 3 –rGO nanocomposite was synthesized via a solvothermal method. The material was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) to analyze its phase composition and morphology. The built sensor demonstrated highly sensitive and selective detection performance towards EP. The Fe 2 O 3 –rGO sensor demonstrated outstanding analytical performance for EP detection, achieving a low detection limit (LOD) of 0.18 µM and a wide linear range from 0.2 to 30 µM. This performance is superior to that of most previously reported electrochemical sensors for EP. The selectivity tests confirmed that the sensor showed excellent anti-interference capabilities against EP structural analogs and other potential interfering substances. In real sample assays, the Fe 2 O 3 –rGO sensor was successfully used to determine EP in commercial veterinary drug and spiked human serum samples, fully demonstrating its practical analytical value.
研究领域:
分析化学
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生物传感器
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纳米医学
·
电化学分析
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药物分析
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临床检验
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2018
·Vol. 8
·期 11
·877
·
IF 3.504
Guangyu Lei,Jingwen Ma,Zhen Li,Xiaobin Fan,Wenchao Peng,Guoliang Zhang,Fengbao Zhang,Yang Li
In this paper, a facile route has been developed to prepare magnetic trimetallic Au-Ag-γ-Fe2O3/rGO nanocomposites. The impact of the preparation method (the intensity of reductant) on the catalytic performance was investigated. The nanocomposites were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The prepared nanocomposites show fine catalytic activity towards the reduction reaction of 4-nitrophenol (4-NP). The nanocomposites also have superparamagnetism at room temperature, which can be easily separated from the reaction systems by applying an external magnetic field.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）