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
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2021
·Vol. 168
·期 5
·057511
·
IF 4.316
Xin-Qin Cai,Kai Zhu,Bo-Tao Liu,Qing-Yu Zhang,Yu-Hui Luo,Dong-En Zhang
In this work, γ-Fe2O3/CNTs composite was facile synthesized by simple hydrothermal method and hydrazine hydrate treatment at low temperature (CNTs = carbon nanotubes). The result of VSM shows that the saturation magnetization of Fe2O3/CNTs composites increase from 0 to 1.29 emu g−1 after hydrazine hydrate treatment, indicating that the Fe2O3 in the composite transforms from α phase to γ phase. Moreover, the electrochemical properties of both α-Fe2O3/CNTs and γ-Fe2O3/CNTs was studied. Compared with α-Fe2O3/CNTs, γ-Fe2O3/CNTs shows enhanced electrochemical performance toward paracetamol determination. Under optimum condition, the γ-Fe2O3/CNTs modified electrode exhibits two linear ranges of 2.5 μM−385 μM and 593 μM−1550 μM and a low detection limit of 0.046 μM. In addition, the constructed sensor can be successfully utilized for detecting paracetamol in different water bodies. This work provides a new clue for the design and construction of excellent electrochemical sensor for paracetamol determination.
研究领域:
材料科学
·
分析化学
✓ 已验证
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2020
·
IF 3.306
Xiangming Fang,Guanhong Lu,Asad Mahmood,Zhihong Tang,Ziwei Liu,Linlin Zhang,Yan Wang,Jing Sun
A novel ternary mica/TiO 2 /Fe 2 O 3 composite pearlescent pigment has been designed for the photocatalytic oxidation of gas-phase acetaldehyde in the application of indoor air purification. The mica/TiO 2 /Fe 2 O 3 -x (MTF-x, x = m Fe2O3 : m TiO2 = 0.5–2: 100) composites were synthesized by a sol-gel assisted hydrothermal method. The MTF-1.5 composite shows optimal photocatalytic performance, which is 1.8 times photodegradation efficiency and 2.2 times CO 2 mineralization efficiency higher than those of pure TiO 2 . The enhanced photocatalytic performance of MTF-x (x = 0.5–2) composites could be associated with enhanced reflectivity of mica, which eventually improved the light absorption properties. Also, the presence of TiO 2 /Fe 2 O 3 heterostructure facilitated charge separation in the MTF ternary composite. Besides, superoxide radical was proven as the decisive active species for the degradation of gaseous acetaldehyde. This work provides a systematic approach to develop a potential multi-functional pearlescent pigment to purify indoor air.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Anran Chen,Liang Xu,Xiaojing Zhang,Zhimao Yang,Shengchun Yang
α-Fe2O3 nanoparticles (NPs) with morphologies varying from shuttle to drum were synthesized through an anion-assisted and surfactant-free hydrothermal method by simply varying the ratios of ethanol and water in solvent. Control experiments show that the structural evolution can be attributed to a small-molecular-induced anisotropic growth mechanism in which the growth rate of α-Fe2O3 NPs along the a-, b-, or c-axis was well-controlled. The detailed structural analysis through the high-resolution transmission electron microscope (HRTEM) indicated that shuttle-like Fe2O3 NP surface was covered by high-density atomic steps, which endowed them with the enhanced adsorption and sensor ability toward dopamine (DA). The XPS characterizations indicated that the percentages of the OC component follow the order of shuttle-like Fe2O3 (S-Fe2O3 for short) > pseudoshuttle-like Fe2O3 (Ps-Fe2O3 for short) > polyhedron-like Fe2O3 (Ph-Fe2O3 for short) > drum-like Fe2O3 (D-Fe2O3 for short). Benefits from these structural advantages, the S-Fe2O3 NPs–Nafion composite electrode exhibited remarkable electrochemical detection ability with a wide liner range from 0.2 μM to 0.107 mM and a low detection limit of 31.25 nM toward DA in the presence of interferents.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Shaowei Yao,Zhiqiang Shi,Xingxiang Zhang
A new α-Fe 2 O 3 porous microrods using as an anode for lithium-ion batteries (LIBs) were prepared by a facile hydrothermal reaction and heat treatment at different temperature. The effect of calcination temperature on the structure, morphology and electrochemical performance of α-Fe 2 O 3 microrods anode materials has been systematically investigated. The results demonstrate that the calcination temperature can affect mesoporous distribution and the primary particle size of α-Fe 2 O 3 microrods and then affect the electrochemical performance. The α-Fe 2 O 3 microrods calcined at 700 °C (F700) outperformed other samples in terms of reversible capacity, cyclability, and rate capability. F700 exhibits excellent reversible capacity of 1083 mAh g −1 in the first cycle and 733 mAh g −1 after 100 cycles at 100 mA g −1 in the range of 0.01–2.5 V. Therefore, α-Fe 2 O 3 microrods can be one promising anode materials for LIBs.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2021
·Vol. 9
·期 2
·259-266
·
IF 6.569
Xiao Liang,Jing Zhang,Kewei Zhang,Xiaodong Yang,Mingzhe Zhang
Surface modification is a simple and efficient method to enhance the gas sensing properties of semiconductor materials. In this paper, Fe2O3 nanoparticle-decorated ZnO nanorods are successfully fabricated by a facile two-step synthesis method. The SEM, TEM and XPS results indicate that the Fe2O3 nanoparticles grow directly on the surface of ZnO nanorods. The gas sensing properties of pure ZnO and Fe2O3/ZnO nanocomposites have been systematically analyzed. The gas response value of a 1 wt% Fe2O3/ZnO sample is 14.5 to 100 ppm triethylamine (TEA) at the optimal operating temperature of 260 °C, which is about 3 times that of pure ZnO (5.0). In addition, the 1 wt% Fe2O3/ZnO sensor reflects a rapid response/recovery time (1 s/14 s). The density functional theory (DFT) simulation results confirm that after the Fe2O3 cluster modifies the surface of ZnO, the atomic position at the interface changes significantly and the structure of Fe2O3/ZnO has the lowest adsorption energy for TEA molecules; these are the key factors for improving the gas sensitivity of the composite sample.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Shendan Zhang,Mingjie Yang,Kunyu Liang,Ayse Turak,Bingxue Zhang,Da Meng,Chuanxi Wang,Fengdong Qu,Wenlong Cheng,Minghui Yang
Nanosized Pt-loaded Fe 2 O 3 nanocubes are prepared through, successively, a simple hydrothermal reaction, two-step annealing process and finally reduction with NaBH 4 of H 2 PtCl 4 . The resultant Pt decorated Fe 2 O 3 nanocubes, made up of Fe 2 O 3 nanoplatelets, are hierarchical, hollow and porous, with an average edge length of 200–300 nm. The sensor based on Pt decorated Fe 2 O 3 nanocomposites exhibits higher response (R air /R gas = 25.7) to 100 ppm of acetone gas at lower temperature (139 °C), with a short response-recovery time (3 s/22 s), compared with pure Fe 2 O 3 nanocubes sensor. The Pt-Fe 2 O 3 nanocomposite sensor shows excellent potential to act as a low cost, low temperature sensor for acetone gas, with high acetone selectivity under high humidity conditions and with the interference of other gases. Under various environmental conditions designed to mimic exhaled air, the sensor is able to detect ppb amounts of acetone, with high repeatability and stability, making it suitable for applications such as oral diabetic sensors. The attractive chemical and electronic sensitizations of partially oxidized Pt nanoparticles are responsible for the enhancement of acetone sensing performance. Based on the high acetone selectivity, high stability and fast dynamic response, the Pt enhanced Fe 2 O 3 nanocubes sensor is an exceptionally suitable candidate for a low cost acetone sensor, and the proposed approach provides a route to develop gas sensors that can operate at low temperatures for a wide variety of applications.
研究领域:
材料科学
·
医学传感器
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 3
·2699-2707
·
IF 2.22
Zhang Jianxia,Li Haiying,Li Yu,Zhao Bing,Ju Xiangnan,Chen Wenbin,Lu Bingliang,Zeng Xiangan,Liu Li
This paper reports the preparation of an excellent acetone gas-sensitive material consisting of a Eu 3+ -decorated α-Fe 2 O 3 microflower (EFM) composite film by a simple hydrothermal and calcination method. For comparison, pure α-Fe 2 O 3 microflowers (PFM) are prepared with the same method. Scanning electron microscopy (SEM) images show that the samples are a loose 3D flower-like structure with many voids surrounded by many thin nanosheets. The structure of the samples was investigated using X-ray diffraction and X-ray photoelectron spectroscopy (XPS). The PFM and EFM gas sensors were systematically tested for gas sensitivity at an optimum temperature of 145 °C. The sensitivity of the EFM gas sensor with 50 ppm of acetone gas was 83, which was up to four times that of the PFM sensitivity (19). The EFM sensor had an extremely fast response time (4 s) and recovery time (38 s). Moreover, the minimum concentration of acetone that we could detect was 0.1 ppm with a response value of 2.1. The enhancement of gas sensitivity was attributed to the high catalytic activity of the Eu 3+ additive.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Chemistry
·
2022
·
IF 7.613
Yuan Wang,Xuemei Liu,Quyun Chen,Tian C. Zhang,Like Ouyang,Shaojun Yuan
Addressing arsenite pollution in groundwater has drawn great attention. It is attractive to pre-oxidize highly mobile As(III) to relatively low-toxic As(V) with a subsequent adsorption separation process. Herein, BiOI anchoring on γ-Fe 2 O 3 is performed to synthesize BiOI/γ-Fe 2 O 3 core–shell nanoparticles for efficient removal of As(III) via a simultaneous photocatalytic oxidization–adsorption process. The physical and chemical structures of BiOI/γ-Fe 2 O 3 are investigated by transmission electron microscopy , Fourier transform infrared spectroscopy , and X-ray diffraction measurements. The photoluminescence and electron spin resonance (ESR) characterization were employed to ascertain the possible reaction mechanism of visible-light-driven photocatalytic oxidation of As(III). Such BiOI/γ-Fe 2 O 3 delivers a superior As(III) removal capability under visible light irradiation with an arsenic removal efficiency of 99.8% within 180 min, higher than those of BiOCl/γ-Fe 2 O 3 (81.7%) and BiOBr/γ-Fe 2 O 3 (98.9%). The optimal BiOI/γ-Fe 2 O 3 (molar ratio of 2:1) is obtained by rationally adjusting the molar ratio of BiOI to γ-Fe 2 O 3 . The as-synthesized BiOI/γ-Fe 2 O 3 performs well in a wide pH range of 2–8. Only coexisting PO 4 3− anions have a significant effect on the As(III) removal. The free radical trapping experiment and ESR results demonstrate that the ⋅O 2 − and h + are the main active substances for the photocatalytic oxidation of As(III) on BiOI/γ-Fe 2 O 3 . This work not only gives a novel magnetic core–shell nanoparticle photocatalyst for efficient photocatalytic oxidation and adsorption of As(III) but also offers a new strategy to rationally design BiOX for its related practical applications.
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. 4
·期 23
·11788-11793
·
IF 3.708
Yanyan Fang,Hailian Xiao,Ning Sui,Manhong Liu,William W. Yu
Supported Pt nanocatalysts with controlled particle size and size distribution were prepared by immobilizing Pt colloids on different iron oxide supports (γ-Fe2O3, Fe3O4, Fe2O3) via physical adsorption. These catalysts were used to catalyze the liquid phase hydrogenation of o-chloronitrobenzene (o-CNB) to o-chloroaniline (o-CAN) under mild reaction conditions (298 K, 0.1 MPa). The Pt/γ-Fe2O3 exhibited higher catalytic selectivity and activity than other similar works (selectivity = 99.9%, activity = 0.20 molo-CNB/(molPt s)). The stability of the Pt/γ-Fe2O3 was investigated, and the result showed that higher drying temperature could increase the stability of the catalyst.
研究领域:
化学工程
·
催化材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2017
·Vol. 52
·期 20
·12358-12369
·
IF 2.599
Ji Shengning,Zhang Zhiming,Jiang Xiaohui,Yu Liangmin
The three-layer core–shell–shell γ-Fe 2 O 3 –SiO 2 –poly (3,4-ethylenedioxythiophene) (PEDOT) nanocomposite has been successfully synthesized by a facile chemical process followed by a detailed investigation of morphology, composition, electromagnetic, and microwave absorption properties. The electrical conductivity of γ-Fe 2 O 3 –SiO 2 –PEDOT nanocomposites was as high as 3.34 S cm −1 , and the saturation magnetization was in the range of 1–7 emu g −1 . The minimum reflection loss reached −27.5 dB at 13.8 GHz with a matching layer thickness of 2.0 mm and an effective absorption bandwidth (< −10 dB) of about 4.1 GHz (12.0–16.1 GHz). The excellent microwave absorbing performance of this nanocomposite is due to proper impedance matching and the synergistic interaction of dielectric loss, the magnetic loss, and core–shell microstructure. Moreover, the electromagnetic and microwave absorbing properties of γ-Fe 2 O 3 –SiO 2 –PEDOT nanocomposites can be regulated by changing the dosage of functionalized γ-Fe 2 O 3 –SiO 2 .
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
COMBUSTION SCIENCE AND TECHNOLOGY
·
2025
·
IF 1.5
Baichen Chen,Yi Wang,Jianchen He,Xiaolan Song,Chongwei An
This article uses a combination of experimental and simulation methods for mutual verification to explore the possibility of nano aluminum thermite damaging chips and disrupting circuit systems. In terms of experiments, Fe2O3/SiO2/Al and SnO2/SiO2/Al aluminum thermites were prepared by physically mixing micro Al powder, nano SiO2, and nano metal oxide powder in a certain proportion. The binder was added and pressed into a charge column for ignition testing. The prepared aluminum thermite was characterized and its performance was tested using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy(XPS), and constant pressure combustion experiments.In terms of molecular dynamics simulation, Materials Studio software was used to investigate the interaction relationships between atoms in the aluminum thermite. The reaction process and properties of the aluminum thermite under adiabatic conditions at different initial temperatures were explored from the perspectives of potential energy, radial distribution function, mean square displacement, and self diffusion coefficient. The simulation results were compared with experimental reaction phenomena. The results show that the aluminum thermite prepared by physical method is uniformly mixed, various materials are fully adhered, well dispersed, and there is no agglomeration phenomenon. In terms of combustion performance, the overall performance of Fe2O3/SiO2/Al thermite is better than that of SnO2/SiO2/Al thermite, with higher combustion efficiency, higher reaction temperature, and the ability to maintain high temperature for a longer period of time. The combustion of Fe2O3/SiO2/Al aluminum thermite is more complete, and the reaction generates more elemental Si, which plays a positive role in the damage of chips. In terms of molecular dynamics simulation, the aluminum thermal reaction of Fe2O3/SiO2/Al at different initial temperatures is more stable, with a faster energy release rate and a higher total energy content than SnO2/SiO2/Al. The aluminum thermal reaction generates oxides of elemental Fe/Sn, Si, and Al. Overall, the diffusion coefficients of both aluminum thermites increase with the increase of initial temperature, and the intensity of the reaction also increases with the increase of initial temperature. Temperature has an accelerating effect on their diffusion, and SnO2/SiO2/Al has stronger diffusion ability than Fe2O3/SiO2/Al. The Fe2O3/SiO2/Al aluminum thermite has a better damage effect on chips, and the simulation and experimental results are consistent.
研究领域:
材料科学
·
计算化学
·
工程学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）