JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2015
·Vol. 19
·期 12
·3613-3620
·
IF 2.446
Yang Suling,Li Gang,Wang Guifang,Deng Dehua,Qu Lingbo
A novel electrochemical sensor based on Fe 2 O 3 nanoparticles supported on N-doped graphene (Fe 2 O 3 NPs/N–GR) has been fabricated for electrocatalytic oxidation and detection of L-cysteine. The Fe 2 O 3 NPs/N–GR was characterized by scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy (XPS), and electrochemical methods. The electrochemical behavior of L-cysteine at Fe 2 O 3 NPs/N–GR was investigated by voltammetry. The Fe 2 O 3 NPs/N–GR showed a very efficient electrocatalytic activity for the oxidation of L-cysteine in 0.1 M phosphate buffer solution (PBS, pH 7.0). The oxidation peak currents increased dramatically at Fe 2 O 3 NPs/N–GR-modified electrode. The potential utility of the sensor was demonstrated by applying it to the analytical determination of L-cysteine. Experimental results showed that the electrocatalytic current increased linearly with L-cysteine concentration in the range of 0.2–400 μM with a lowest detectable concentration of 0.1 μM.
研究领域:
分析化学
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生物医学工程
·
材料科学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Vasanthakumar Vasudevan,Baoyou Pei,Wentao Xiong,Jiao He,Shixuan Li,Dongha Huang,Xu Liao,Jinqing Lin
The Fenton degradation process has attracted significant attention as a promising method for treating organic dye-contaminated wastewater. However, its industrial application is limited by unsatisfactory catalytic performance. In this study, we synthesized a novel heterogeneous CuFe 2 O 4 /Fe 2 O 3 /C HCP Fenton catalyst by calcining a Fe/Cu-containing hyper-crosslinked polymer (HCP) and investigated its efficacy in degrading methylene blue (MB) dye pollutants. The degradation experiments using MB revealed that the optimized CuFe 2 O 4 /Fe 2 O 3 /C HCP -2/H 2 O 2 catalytic system achieved an impressive degradation efficiency of 97 % (k=0.2374 min −1 within 14 min, along with a total organic carbon conversion efficiency of 58.5 %. This degradation rate was approximately six times higher than that of Fe 2 O 3 /C HCP /H 2 O 2 (41 %; k=0.0365 min⁻¹) catalytic system, highlighting its superior degradation capabilities. Additionally, CuFe 2 O 4 /Fe 2 O 3 /C HCP -2 exhibited a wide operational pH range (pH 3–9) and maintained high cycling efficiency even after five successive recycles, indicating robust stability and reusability. The enhanced Fenton catalytic performance of CuFe 2 O 4 /Fe 2 O 3 /C HCP -2 can be attributed to the high specific surface area and porosity of the hyper-crosslinked polymer precursor, which ensures uniform dispersion of Fe/Cu elements, significantly improving catalytic efficiency and stability. This study provides a feasible strategy to enhance Fenton degradation activity, aiding in the removal of organic dye pollutants from aqueous environments and purification systems.
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 APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 47
·e56261
·
IF 2.7
Jiayu Lin,Yongbo Hou,Lailong Ding,Yifan Wang,Jinhu Hu,Xishun Qiu,Chao Wu,Mingliang Ma,Wei Gao
Metal–organic frameworks (MOFs) have garnered significant attention in recent years due to their potential application in flame-retardant polymeric materials. In this work, Fe 2 O 3 /ZnFe 2 O 4 /g-C 3 N 4 @ZIF-8 flame retardants were synthesized via solvothermal and calcination techniques, and their elemental composition and morphologies were thoroughly characterized. The flame retardancy of polyurea (PUA) composites incorporating varying dosages of these flame retardants was evaluated using cone calorimetry tests (CCT). The findings demonstrate that the incorporation of Fe 2 O 3 /ZnFe 2 O 4 /g-C 3 N 4 @ZIF-8 significantly enhanced the flame retardant properties of PUA composites. With the addition of 3 wt% of the flame retardant, the peak heat release rate (PHRR), total heat release (THR), total smoke production (TSP), and total CO yield (TCO) of the PUA composites decreased to 890.82 kW/m 2 , 131.34 MJ/m 2 , 12.30 m 2 , and 2.39 g, respectively, reflecting reductions of 33.59%, 18.59%, 29.40%, and 47.93% compared with pure PUA. The flame-retardant mechanism was systematically analyzed in both the condensed and gas phases. This study provides a robust experimental foundation and novel insights that contribute to the development of advanced flame-retardant coating materials.
研究领域:
材料科学
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阻燃技术
·
聚合物工程
✓ 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
ACS Applied Materials & Interfaces
·
2012
·
IF 4.525
Wei Wu,Shaofeng Zhang,Xiangheng Xiao,Juan Zhou,Feng Ren,Lingling Sun,Changzhong Jiang
Mesoporous spindlelike iron oxide/ZnO core–shell heterostructures are successfully fabricated by a low-cost, surfactant-free, and environmentally friendly seed-mediate strategy with the help of postannealing treatment. The material composition and stoichiometry, as well as these magnetic and optical properties, have been examined and verified by means of high-resolution transmission electron microscopy and X-ray diffraction, the thickness of ZnO layer can be simply tailored by the concentration of zinc precursor. Considering that both α-Fe2O3 and ZnO are good photocatalytic materials, we have investigated the photodegradation performances of the core–shell heterostructures using organic dyes Rhodamin B (RhB). It is interesting to find that the as-obtained iron oxides/ZnO core–shell heterostructures exhibited enhanced visible light or UV photocatalytic abilities, remarkably superior to the as-used α-Fe2O3 seeds and commercial TiO2 products (P25), mainly owing to the synergistic effect between the narrow and wide bandgap semiconductors and effective electron–hole separation at the interfaces of iron oxides/ZnO.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Yue Wang,Ya-Jie Wang,Shun-Shun Chen,Chen-Chen Liu,Li Chen,Zhong-Gang Liu,Zheng Guo
The performance of chemiresistive gas sensors greatly depends on the sensing materials. Till now, it is still a hot topic to develop high-performance sensing materials. In this study, hollow Fe 2 O 3 octahedrons incorporated into porous In 2 O 3 nanofibers (Fe 2 O 3 @In 2 O 3 ) have been prepared using the electrospinning method , followed by thermal oxidation . Through the electrospinning technique , MIL-101(Fe) octahedrons are incorporated as sacrificial templates into the precursor nanofibers containing In 3+ . The precursor nanofibers are transformed into porous In 2 O 3 nanofibers by calcination in air, and MIL-101(Fe) are simultaneously changed into hollow Fe 2 O 3 octahedrons, forming Fe 2 O 3 @In 2 O 3 nanofibers. Considering their unique morphology, the gas sensing properties of the prepared nanofibers are investigated. The results demonstrate that they exhibit high response and selectivity toward triethylamine (TEA) with a good stability. Furthermore, their dynamic sensing behaviors are investigated under the modulation of working temperature by triangular wave heating voltage. According to their characteristic response curves, TEA can be effectively discriminated among all the detected gases in combination with a simple principal component analysis (PCA)-based recognition algorithm. Additionally, TEA can be quantitatively analyzed through the relationship between its concentration and the response at the characteristic point of the response curves.
研究领域:
材料科学
·
传感技术
✓ 已验证
DOI
高影响因子
Materials Today Chemistry
·
2025
·
IF 6.7
Shouyu Lu,Lei Sun,Shun Liu,Ping He,Jiang Wu,Mei Ma,Yang Ling,Hong Yao,Guangqian Luo,Dapeng Wang
A Fe 2 O 3 /CaSiO 3 composite adsorbent was synthesized using calcium nitrate as a precursor for the adsorption and removal of As 2 O 3 from high-temperature flue gas at temperatures ranging from 1073 K to 1273 K. A combination of experimental investigations and theoretical calculations was employed to analyze the impact of Fe-doped calcium silicate on its arsenic adsorption performance, as well as to elucidate the adsorption mechanism of the Fe 2 O 3 /CaSiO 3 composite material for As 2 O 3 . The experimental results demonstrated that the incorporation of Fe 2 O 3 resulted in an enhanced pore structure within the material. When the molar ratio of Fe:Si was set at 1:5, the Fe 2 O 3 /CaSiO 3 adsorbent exhibited optimal As 2 O 3 adsorption capacity at 1273 K, achieving a remarkable value of 996.0 mg/kg—significantly higher than that observed with pure calcium silicate. During the adsorption process, the doped iron oxide released additional free electrons, thereby facilitating the conversion of lattice oxygen into chemisorbed oxygen. Furthermore, density functional theory (DFT) calculations were utilized to further investigate the microscopic mechanisms underlying the behavior of the Fe 2 O 3 /CaSiO 3 composite adsorbent. The findings indicated that Fe sites within Fe 2 O 3 /CaSiO 3 served as primary active sites and electron transport channels for this material, promoting both separation and conversion processes involving lattice oxygen. During arsenic adsorption, significant orbital hybridization occurred between Fe atoms and O atoms in As 2 O 3 , which contributed to enhancing stability within the chemisorption system. Overall, Fe 2 O 3 /CaSiO 3 displayed exceptional performance in terms of arsenic adsorption capabilities along with notable anti-sintering properties, positioning it as a promising composite material for effective arsenic removal under high-temperature conditions.
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
ChemSusChem
·
2018
·Vol. 11
·期 13
·2156-2164
·
IF 7.411
Feng Li,Jing Li,Jie Zhang,Lili Gao,Xuefeng Long,Yiping Hu,Shuwen Li,Jun Jin,Jiantai Ma
Graphical Dope to promote : A high-performance photoanode consisting of NiO nanoparticles anchored on a gradient P-doped α-Fe 2 O 3 nanorod array (NiO/P-α-Fe 2 O 3 ) is successfully fabricated. The electrochemical results show that the photoanode presents a high photocurrent density and long-term stability for improved water oxidation. The photoelectrochemical (PEC) water-splitting efficiency of a hematite-based photoanode is still far from the theoretical value due to its poor surface reaction kinetics and high density of surface trapping states. To solve these drawbacks, a photoanode consisting of NiO nanoparticles anchored on a gradient phosphorus-doped α-Fe 2 O 3 nanorod (NR) array (NiO/P-α-Fe 2 O 3 ) was fabricated to achieve optimal light absorption and charge separation, as well as rapid surface reaction kinetics. Specifically, a photoanode with the NR array structure allowed a high mass-transport rate to be achieved, while phosphorus doping effectively decreased the number of surface trapping sites and improved the electrical conductivity of α-Fe 2 O 3 . Furthermore, the p–n junction that forms between NiO and P-α-Fe 2 O 3 can further improve the PEC performance due to efficient hole extraction and the water oxidization catalytic activity of NiO. Consequently, the NiO/P-α-Fe 2 O 3 NR photoanode produced a high photocurrent density of 2.08 mA cm −2 at 1.23 V versus a reversible hydrogen electrode and a 110 mV cathodic shift of the onset potential. This rational design of structure offers a new perspective in exploring high-performance PEC photoanodes.
研究领域:
材料科学
·
能源研究
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Guijuan Wei,Xixia Zhao,Kun Du,Yiwen Huang,Changhua An,Shujun Qiu,Miao Liu,Shuang Yao,Yue Wu
Flexible asymmetric supercapacitors (FASCs) have attracted increasing interest in portable and wearable electronics. The practical application of FASCs in high energy density devices is limited by their low specific capacity, which can be effectively addressed by designing electrode materials hierarchically on the micro-nanoscale. Herein, well-defined 3D porous hierarchical CuCo 2 O 4 @carbon quantum dots (CQDs) and Fe 2 O 3 @CQDs architectures are rationally synthesized through a simple CQDs-induced hydrothermal self-assembly technique. Both of the as-prepared CuCo 2 O 4 @CQDs and Fe 2 O 3 @CQDs electrodes exhibit improved specific capacity, desirable rate capability and complementary potential range. A FASC (CuCo 2 O 4 @CQDs//Fe 2 O 3 @CQDs) on graphite paper delivers a high operation voltage of 1.55 V, an energy density of 39.5 Wh kg −1 at 1203.7 W kg −1 , and long cycling lifespan. The excellent performance is ascribed to the good electronic conductivity with the assistance of CQDs and their unique 3D mesoporous structures with extraordinary specific surface area, which could provide fruitful active sites for electrochemical reactions . The newly developed FASC based on the Faradaic-type electrodes is inspiring, and would be promising for the applications in wearable electronic devices.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2019
·
IF 6.864
Yanfei Li,Yuanyuan Fu,Shouhui Chen,Zhenzhong Huang,Li Wang,Yonghai Song
A rapid and simple way to prepare porous Fe 2 O 3 /Fe 3 O 4 @carbon octahedron arrayed on three-dimensional graphene foam (Fe 2 O 3 /Fe 3 O 4 @C/G) nanocomposites was developed. Firstly, Fe-metal organic frameworks (MOFs)/graphene oxide (GO) precursor was fabricated by growing octahedral Fe-MOFs on the surface of GO and then the as-prepared Fe-MOFs/GO was rapidly transformed into porous Fe 2 O 3 /Fe 3 O 4 @C/G by combusting the mixture of precursors and triethylamine (TEA) in air. In the combustion process, GO was reduced and connected each other into N-doped G foam, and Fe-MOFs were transformed into porous Fe 2 O 3 /Fe 3 O 4 @C octahedron and arrayed on G foam. The porous structure, porous carbon and G foam relieved the volume expansion of Fe 2 O 3 /Fe 3 O 4 nanoparticles , and enhanced electrical conductivity of nanocomposites. The as-prepared Fe 2 O 3 /Fe 3 O 4 @C/G showed a high discharge capacity (1210 mAh g −1 , 200 cycles) and long cycle life (5 A g −1 , 400 cycles) when was applied to lithium-ion batteries. This work to prepare Fe 2 O 3 /Fe 3 O 4 @C/G nanocomposites through the combustion of TEA and Fe-MOFs/GO could save energy, achieve rapid preparation and shorten the reaction time. It might provide an original way for fabrication of transition metal oxides@C derived from MOFs and a constructive view into the preparation of composite materials.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2017
·
IF 3.582
Yu-pei Li,Fa-tang Li,Xiao-jing Wang,Jun Zhao,Jiang-nan Wei,Ying-juan Hao,Ying Liu
A quantum-sized hematite iron oxide (α-Fe 2 O 3 )/graphitic carbon nitride (g-C 3 N 4 ) hybrids have been designed and constructed through a facile in situ calcination treatment. The α-Fe 2 O 3 /g-C 3 N 4 hybrids were analyzed via various characterization techniques including XRD , TEM , UV–Vis DRS , XPS , and their photocatalytic efficiencies were evaluated by visible light-driven hydrogen evolution . The results reveal that the cooperation of α-Fe 2 O 3 and g-C 3 N 4 during fabrication process leads to synergy effects of not only the morphology but also the microstructure. These hybrids exhibit much higher hydrogen evolution efficiency than pure g-C 3 N 4 under visible-light illumination due to their improved light harvesting capability, enhancement of surface areas , predominant (110) facet exposure of α-Fe 2 O 3 as well as a prominent quantum size effect , and highly efficient electron transfer and separation. A proposed Z-scheme mechanism was further verified experimentally.
研究领域:
材料科学
·
光催化
·
纳米材料
·
能源化学
·
半导体物理
·
表面科学
✓ 已验证
DOI
高影响因子
ENERGY & FUELS
·
2024
·
IF 5.2
Yuchuan Feng,Penghui Wang,Nana Wang,Xin Guo,Suxia Ma
Reactive force field molecular dynamics (ReaxFF MD) simulation and experiments were employed to deeply reveal the sintering mechanism of Fe2O3 particles during iron-based chemical looping combustion. The sintering process of Fe2O3 particles was simulated at different temperatures (973–1273 K). The results showed that the temperature increase has limited effect on the structure of Fe2O3 particles and slightly increases the atomic irregularity. The sintering process of Fe2O3 particles can be divided into three stages: the proximity phase, rapid formation, and slow growth of the sintering neck. The temperature increase significantly promotes the sintering process of Fe2O3 particles. The mean-square displacement and Arrhenius equations were used to study the atomic diffusion properties of Fe2O3 particles. The diffusion activation energy of surface atoms is lower than that of inner atoms, implying that the surface atoms have stronger diffusion ability. With the increase of temperature, more Fe atoms diffuse toward the interface of Fe2O3 particles. Increasing the temperature can accelerate the diffusion and enrichment of surface atoms, especially Fe, toward the sintering neck region, resulting in more serious sintering of Fe2O3 particles. ReaxFF MD simulation is in good agreement with the experimental results. Inhibiting the atomic diffusion is the key to improving the antisintering ability of Fe2O3 oxygen carriers.
研究领域:
化学工程
·
材料科学
✓ 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）