JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2023
·Vol. 34
·期 9
·1-13
·
IF 2.8
Lu P. A.,Manikandan M. R.,Yang P. F.,He Y. L.,Yang F.,Dang S. T.,Shi Y. C.,Lou W. B.,Liu R.,Wu S. J.,Li X. F.,Hu Y. C.,Shang J.,Yin S. Q.,Wang X. W.
The development of iron-based supercapacitors has been gaining more attention in the field of energy storage applications due to their non-toxicity, abundance and low cost. In this paper, single phase hematite nanoparticles were synthesized by high temperature thermal decomposition method and directly served as electrochemical supercapacitor electrode material. Structural study (XRD) revealed the single-phase hematite nanoparticles formation with trigonal alpha-Fe 2 O 3 structure. Morphological study (SEM) confirms silkworm chrysalis shape like morphology by many interconnected nanoparticles of the average size of 30 nm. The electrochemical study indicates that the synthesized hematite electrode material can maintain good farad capacitance at 100 mV/s and it shows a specific capacitance of 149.3 F/g at a current density of 1 A/g with the maximum energy and power densities of 4.20 Wh/Kg and 224.90 W/Kg, respectively. Equivalent series resistance and charge transfer resistance of alpha-Fe 2 O 3 electrode material are 1.079 Ω and 9.055 Ω, respectively. This is attributed to the alpha-Fe 2 O 3 nanostructure, which can provide a large contact area between electrode and electrolyte for ionic reaction and transport. The material can still retain 43.8% of the initial specific capacitance after 5000 cycles. The investigation results show that the hematite nanoparticle-based electrode material holds great potential in electrochemical supercapacitors and provides a certain reference in the direction of global energy needs.
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JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 54
·期 5
·4115-4123
·
IF 2.993
Zhou Xiang,Zhu Ying,Ke Xiang,Zhang Kaili
In this study, we use simultaneous differential scanning calorimetry and thermogravimetric analysis to analyze the solid-state reaction characteristics of Al/Fe 2 O 3 nanothermites before n -Al melts. Different experimental setups for thermal analysis are compared, and the heat-release characteristics are studied on Al/Fe 2 O 3 nanothermites in the form of powder and pellet, respectively. It is found that protection provided by mere argon flow is far from enough for thermal analysis of Al/Fe 2 O 3 nanothermites. The experimental setup must be free of oxygen; otherwise, the determined exothermic peak is mostly the oxidation of n -Al by the residue oxygen molecules in the furnace body, due to the high reactivity and moderate accessibility of free oxygen molecules. Under proper experimental setup, it is found that besides the redox reaction between n -Al and n -Fe 2 O 3 , intermetallic reaction also occurs to form Fe 4 Al 13 . Moreover, the intermetallic reaction is more noticeable for nanothermite pellet than for nanothermite powder, and the eutectic reaction of Fe 4 Al 13 and n -Al leads to melting peaks below 655 °C. The results indicate that instrument configuration and sample status affect the testing results to a large extent, and one should be prudent to derive reaction characteristics of nanothermites.
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Journal of Water Process Engineering
·
2018
·
IF 0
Chenlu Ye,Kang Hu,Zhijuan Niu,Yiran Lu,Lin Zhang,Kai Yan
One-step controllable synthesis of rhombohedral α-Fe 2 O 3 photocatalyst has been successfully developed by P123 soft template assisted method. A combination analysis of XRD, BET, SEM and HRTEM has documented that P123 surfactant plays a crucial role in the controllable synthesis of rhombohedral α-Fe 2 O 3 with the exposure of (110) and (012). The as-obtained α-Fe 2 O 3 material is efficient for the photocatalytic degradation of Bisphenol A (BPA). About 91% of BPA (30 mg/L) was degraded by using 1 g/L α-Fe 2 O 3 within 6 h under the simulated sunlight irradiation, which was almost twice higher than that of commercial Fe 2 O 3 . More importantly, reaction intermediates (e.g., 4, 4′-methylenediphenol, phenol and lactic acid) were confirmed by LC–MS/MS analysis, and the rational pathway of BPA degradation was finally proposed.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2019
·Vol. 30
·期 10
·9087-9096
·
IF 2.195
Liu Minmin,Yu Shuili,Hou Li-an,Hu Xiaojun
A series of Fe 2 O 3 and TiO 2 immobilized on NZVI modified zeolite composites ((n)Fe 2 O 3 –TiO 2 /FeZ) were synthesized by a one-pot hydrothermal method combined with calcination for oxytetracycline (OTC) removal. Some of the zero valent iron particles (NZVI) were impregnated into the framework of zeolite X by hydrothermal method and others were oxidized to Fe 2 O 3 through calcination. The TiO 2 and Fe 2 O 3 particles were immobilized on the surface of zeolite X. Compared with pure Fe 2 O 3 –TiO 2 , the OTC adsorption and photocatalytic degradation efficiency of (n)Fe 2 O 3 –TiO 2 /FeZ increased sharply. As the weight ratio of NZVI to TiO 2 was six and four, the sample had the highest adsorption efficiency (95%) and showed the highest total efficiency (98%) via adsorption and visible light—driven photocatalytic activity for the degradation of OTC, respectively. The materials also had good cyclic stability and the removal efficiency reached up to above 80% after four runs. In addition, the photocatalytic mechanism was proposed. The improved photocatalytic activities and stabilities of (n)Fe 2 O 3 –TiO 2 /FeZ for OTC degradation were ascribed to the enhanced adsorption capacity of FeZ, the strong absorbance in the visible light region and improved photo-induced charge carriers separation.
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Materials Research Express
·
2018
·Vol. 6
·期 3
·035503
·
IF 1.151
Qiwei Shi,Jianxiong Liu,Jianzheng Zhen,Guanqun Zhang,Cheng Liu,Qi Cheng,Zhaolin Zhan
The precursor of Fe(OH)3, C and TiO2 was synthesized by a simple one-step hydrothermal method. Then, the of C in the composite was eliminated by calcination at 500 °C for 5 h in an air atmosphere. Thereby, a Fe2O3@TiO2 microspheres composite material is synthesized. The incorporation of Fe2O3 helps provide high specific capacity, high speed cycling and stable life performance. The first discharge capacity of Fe2O3@TiO2 microspheres is 688 mAh g−1, with higher discharge performance, higher reversible capacity and higher cycle performance. Moreover, the 2nd to 50th charge and discharge of Fe2O3@TiO2 microspheres, the capacitance retention rate exceeds 90%. The outstanding stable cycling and well rate performance suggest that Fe2O3@TiO2 microspheres have great potential to be applied as anode material for lithium ion batteries.
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高影响因子
ELECTROANALYSIS
·
2019
·Vol. 31
·期 9
·1809-1814
·
IF 2.691
Fuyan Liu,Peng Wang,Qianqian Zhang,Zeyan Wang,Yuanyuan Liu,Zhaoke Zheng,Xiaoyan Qin,Xiaoyang Zhang,Ying Dai,Baibiao Huang
A non-enzyme photoelectrochemical (PEC) glucose sensor based on α-Fe 2 O 3 film is investigated. The α-Fe 2 O 3 film was fabricated via a simple spin coating method. The proposed glucose sensor exhibits good selectivity, a fast response time of <5 s, a linear range of 0.05 to 6.0 mM, sensitivity of 17.23 μA mM −1 cm −2 and a detection limit of 0.05 μM. Meanwhile, the excellent performances of the α-Fe 2 O 3 sensor were obtained in reproducibility and the long-term stability under ambient condition. The linear amperometric response of the sensor covers the glucose levels in physiological and clinical for diabetic patients. Therefore, this non-enzyme PEC sensor based on α-Fe 2 O 3 film has a great potential application in the development of glucose sensors.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2018
·Vol. 25
·期 23
·22455-22463
·
IF 2.8
Wang Pingping,Dong Faqin,Liu Mingxue,He Huichao,Huo Tingting,Zhou Lei,Zhang Wei
Photoelectrochemical process is an environmentally friendly technology and has a wide application in the control of environmental pollutants. Efficient nanophotocatalysts responsive to visible light are still highly attractive. In this work, α-Fe 2 O 3 /TiO 2 were grown on fluorine doped tin oxide (FTO) substrates by hydrothermal method for photoelectrochemical reduction of Cr(VI). Compared with the separate α-Fe 2 O 3 and TiO 2 electrodes, the composite α-Fe 2 O 3 /TiO 2 electrodes show higher photocurrent density. Under visible light irradiation, 100% removal efficiency of Cr(VI) was obtained after 40 min treatment. The composite α-Fe 2 O 3 /TiO 2 electrodes showed an enhanced absorbance in visible light region and had good stability to photoelectrochemical reduction of Cr(VI). The role of hole scavengers (citric acid and oxalic acid) and pH values was systematically investigated. This novel intensification approach provides new insight on the application of photoelectrochemical reduction in environmental remediation.
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PubMed
高影响因子
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
·
2018
·Vol. 56
·期 20
·2280-2285
·
IF 2.588
Dao-Guang Teng,Xian-Yong Wei,Zheng Yang,Zhi-Min Zong
Thermostable and fluorescent poly(phenylene methylene) (PPM) was synthesized via α-Fe 2 O 3 /attapulgite (α-Fe 2 O 3 / A )-mediated polymerization of benzyl chloride (BC) in CCl 4 in good yields. A carbocationic mechanism was proposed based on the controlling experiment. The structure and properties of PPM were characterized by Fourier transform infrared spectrometry, 1 H and 13 C nuclear magnetic resonance spectrometry, thermogravimetric analysis, elemental analysis, gel permeation chromatography, and UV–vis and fluorescence spectrometry. The results show that PPM possesses outstanding homoconjugation fluorescence and excellent thermal stability with onset decomposition temperature of ca. 420 °C. Recycled α-Fe 2 O 3 / A proved to be still highly active for BC polymerization. Moreover, the strategy features low-cost and readily accessible starting materials, simple one-pot operation, and recyclable catalyst, facilitating future applications. © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2018 , 56 , 2280–2285
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Royal Society Open Science
·
2018
·Vol. 5
·期 6
·
IF 2.504
Xiangyun Han,Xi Zhang,Lei Zhang,Mei Pan,Jinlong Yan
The photodegradation of benzothiazole (BTH) in wastewater with the coexistence of iron oxides and oxalic acid under UV light irradiation was investigated. Results revealed that an effective heterogeneous photo-Fenton-like system could be set up for BTH abatement in wastewater under UV irradiation without additional H2O2, and 88.1% BTH was removed with the addition of 2.0 mmol l−1 oxalic acid and 0.2 g l−1 α-Fe2O3 using a 500 W high-pressure mercury lamp (365 nm). The degradation of BTH in the photo-Fenton-like system followed the first-order kinetic model. The photoproduction of hydroxyl radicals (·OH) in different systems was determined by high-performance liquid chromatography. Identification of transformation products by using liquid chromatography coupled with high resolution tandem mass spectrometry provided information about six transformation products formed during the photodegradation of BTH. Further insight was obtained by monitoring concentrations of the sulfate ion (SO42−) and nitrate ion (NO3−), which demonstrated that the intermediate products of BTH could be decomposed ultimately. Based on the results, the potential photodegradation pathway of BTH was also proposed.
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高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2022
·
IF 4.383
Ningning Zhao,Zhong Yu,Haixia Ma,Ergang Yao,Ting An,Fengqi Zhao,Xiaojiao Yu
Fe 2 O 3 /zeolitic imidazolate framework-8 (ZIF-8) architectures were successfully prepared by a polyvinylpyrrolidone (PVP)-assisted method, which can be as an effective potential catalyst for promoting the thermal degradation of nitrocellulose (NC). Thermal behavior and degradation kinetics of catalyst-NC mixtures were studied using the TG/DTG and DSC methods, and found that the Fe 2 O 3 /ZIF-8-NC pyrolysis possessed a total degradation of 77.96%, a maximum pyrolysis rate temperature of 194.5 °C, and the lowest activation energy of 179.4 ± 16.1 kJ mol −1 , confirming a better thermocatalytic performance of Fe 2 O 3 /ZIF-8 when compared to Fe 2 O 3 and ZIF-8 for NC thermolysis. Furthermore, it can be inferred from the isoconversional analysis, which employs a modified fitting algorithm, that catalyst-NC mixtures and pure NC adhere to the reconstructed “n-order” reaction models. This work showed how a catalyst of the metal oxide/metal-organic frameworks (MOFs) type could improve the pyrolysis of NC, which could serve as a significant reference for the development of additional catalysts of the metal oxide/MOFs for use in NC-based energetic materials.
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CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2022
·
IF 3.898
Yaqiao Liu,Shuozhen Hu,Xinsheng Zhang,Shigang Sun
Efficiently and thoroughly degrading organic dyes in wastewater is of great importance and challenge. Herein, vertically oriented mesoporous α-Fe 2 O 3 nanorods array (α-Fe 2 O 3 -NA) is directly grown on fluorine-doped tin oxide (FTO) glass and employed as the photoanode for photoelectrocatalytic degradation of methylene blue simulated dye wastewater. The O v sites on the α-Fe 2 O 3 -NA surface are the active sites for methylene blue (MB) adsorption. Electrons transfer from the adsorbed MB to Fe-O is detected. Compared with electrocatalytic and photocatalytic degradation processes, the photoelectrocatalytic (PEC) process exhibited the best degrading performance and the largest kinetic constant. Hydroxyl, superoxide free radicals, and photo-generated holes play a jointly leading role in the PEC degradation. A possible degrading pathway is suggested by liquid chromatography-mass spectroscopy analysis. This work demonstrates that photoelectrocatalysis by α-Fe 2 O 3 -NA has a remarkable superiority over photocatalysis and electrocatalysis in MB degradation. The in-depth investigation of photoelectrocatalytic degradation mechanism in this study is meaningful for organic wastewater treatment .
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ACS Applied Energy Materials
·
2022
·
IF 6.959
Qiuyan Hao,Liang Zhang,Yaohui Gao,Da Cao,Jianwei Zhao,Ying Li,Caichi Liu,Zhi Qiao,Wenjun He,Hui Liu
It is indispensable to explore earth-abundant and high-efficiency transition-metal-oxide electrocatalysts toward the hydrogen evolution reaction (HER). However, their catalytic performance is impeded by the poor conductivity. Herein we rationally design and manufacture sulfur-doped Fe2O3 nanosheet arrays grown on iron foam (S-Fe2O3/IF) with enhanced HER performance in alkaline media. The obtained catalyst exhibits a low overpotential of 134 mV to achieve a current density of 10 mA cm–2 with a small Tafel slope of 76 mV dec–1 and shows an excellent long-term durability with barely any degradation for 50 h. The density functional theory calculation and experimental results demonstrate that the sulfur anion could optimize adsorption free energies of hydrogen/water and improve the intrinsic activity of Fe2O3. This work not only develops a catalyst with highly efficient performance but also provides design guidance to rationally manufacture an earth-abundant-element electrocatalyst for large-scale water splitting to hydrogen.
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