ENVIRONMENTAL POLLUTION
·
2019
·
IF 5.714
Feifei Wang,Xiaolin Yu,Maofa Ge,Sujun Wu,Juan Guan,Junwang Tang,Xiao Wu,Robert O. Ritchie
A novel self-assembly method was developed to prepare a γ-Fe 2 O 3 /graphene oxide (GO) heterogeneous catalyst that showed excellent synergy between photocatalysis and Fenton-like reactions. The γ-Fe 2 O 3 /GO catalyst prepared on the iron plates demonstrated efficient and reproducible catalytic activities for water treatment . It takes only 80 min to degrade 50 mg L −1 methylene (MB) completely, which is the main non-biodegradable dye in wastewater from the textile industry . The heterogeneous catalyst is stable over a wide range of pH (from 2.0 to 10.2) for MB degradation, and can be easily extracted from solution and repeatedly used with little loss of catalytic activity. The high activity and stability of the catalyst system can be attributed to charge separation between γ-Fe 2 O 3 and GO, which could accelerate Fenton-like process and photocatalysis. In addition, the dominant reactive oxidant species responsible for the MB degradation, including the hydroxyl radicals (•OH) and holes (h + ), were trapped on the surface of the γ-Fe 2 O 3 /GO composite, as proved by a free-radical quenching experiment. The γ-Fe 2 O 3 /GO heterogeneous catalyst could potentially provide a solution for removal of non-biodegradable dyes from wastewater in the textile industry.
研究领域:
环境科学
·
材料科学
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DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·Vol. 142
·期 43
·e57679
·
IF 2.8
Wenchao Shi,Xuanlin Li,Shili Zhao,Tian He,Bi Yang,Beibei Chen
Developing low-friction, high wear-resistant epoxy-based self-lubricating composites is crucial for reducing friction and wear in transmission components of advanced equipment. However, the shortcomings of brittleness in hence and poor wear resistance of epoxy limit its tribological application under harsh sliding conditions. In this study, the nanohybrid of h-BN nanosheets (BNNSs)-supporting-α-Fe 2 O 3 was designed to harness their synergistic reinforcement and lubricating effect on the tribological performance of epoxy. The feature of α-Fe 2 O 3 /BNNSs was analyzed, and its tribological enhancement on epoxy nanocomposites was explored systematically. Results demonstrated that the α-Fe 2 O 3 of size less than 50 nm was uniformly loaded on the BNNSs surface to form a rough microstructure, which was conducive to perfecting the interfacial compatibility of the epoxy composite. Moreover, the α-Fe 2 O 3 /BNNSs significantly improved the capacity for antifriction and anti-wear of epoxy. Only by filling 0.7 wt% α-Fe 2 O 3 /BNNSs, the coefficient of friction (COF) of the corresponding composite coating was reduced by 85.1%, and its wear rate was significantly reduced, nearly 96.7%. More importantly, the epoxy-0.7 wt%α-Fe 2 O 3 /BNNSs kept reasonable tribological performance under high loads/speeds. By analyzing the worn surface of friction pairs, the tribological synergism of α-Fe 2 O 3 /BNNSs on epoxy coatings was discussed. This study might offer novel insights into the design of high-performance epoxy self-lubricating nanocomposite coatings.
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高影响因子
ACS Nano
·
2025
·
IF 16
Hengdong Ren,Chensi Zhou,Ka Wang,Ximing Zhang,Lei Feng,Wenqing Wei,Yuqing Sun,Yukang Liu,Jun Dai,Xiaobing Xu,Zhiyong Zhang,Xinglong Wu
Interface polarization (one of the slow polarizations) is considered the primary mechanism driving microwave absorption (MA), but limitations in material composition and microstructure design often lead to weak interfacial polarization relaxation. In this work, we developed an interesting heterostructure consisting of carbon nanotube-encapsulated α-Fe2O3 nanocolumns (CNTs@α-Fe2O3). The curvature effects of CNTs induce a built-in electric field between CNTs and α-Fe2O3 nanocolumns, facilitating effective interface polarization. Under microwave irradiation, electron accumulation at the interfaces, driven by the energy-level mismatch between the two materials, further strengthens interface polarization, leading to a highly efficient MA performance. This heterostructured material achieves a minimum reflection loss of −74.1 dB at a thickness of 1.8 mm and an effective absorption bandwidth (reflection loss ≤ −10 dB) of 5.2 GHz (11.9 ∼ 17.1 GHz) at a thickness of only 1.5 mm. X-ray photoelectron spectroscopy and Raman scattering show a distinct blueshift in the Fe 2p binding energy and the A1g mode energy (exclusively associated with Fe atom vibrations), suggesting substantial charge transfer and redistribution at the interface associated with enhanced interface polarization. This work provides insights into interface polarization through the strategic design of energy levels and materials.
研究领域:
材料科学
·
物理学
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DOI
PubMed
高影响因子
Energies
·
2017
·Vol. 10
·期 9
·1296
·
IF 2.262
Yizhi Yan,Haolin Tang,Fan Wu,Rui Wang,Mu Pan
A cocoon-like α-Fe2O3nanocomposite with a novel carbon-coated structure was synthesized via a simple one-step hydrothermal self-assembly method and employed as supercapacitor electrode material. It was observed from electrochemical measurements that the obtained α-Fe2O3@C electrode showed a good specific capacitance (406.9 Fg−1at 0.5 Ag−1) and excellent cycling stability, with 90.7% specific capacitance retained after 2000 cycles at high current density of 10 Ag−1. These impressive results, presented here, demonstrated that α-Fe2O3@C could be a promising alternative material for application in high energy density storage.Keywords:one-step;self-assembly;α-Fe2O3;carbon coating;supercapacitors
研究领域:
材料科学
·
电化学
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DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2015
·
IF 6.409
Chan Song,Guan-Yao Wang,De-Ming Kong
This work investigated the interactions of α-Fe 2 O 3 nanoparticles (NPs) with different structural nucleic acids and their fluorescence quenching ability towards fluorophore-labelled nucleic acid probes . Different from bulk α-Fe 2 O 3 samples, nanoscale α-Fe 2 O 3 particles exhibit the unique properties of strong adsorption and fluorescence quenching to fluorophore-labelled single-stranded DNA (ssDNA) probes. Based on these findings, a facile fluorescence method was developed for versatile quantification of nucleic acids. The size scale of NPs makes a significant impact on this sensing platform. Better selectivity was given by bigger NP (50–100 nm)-based nucleic acid-sensing platform compared with smaller NP (30 nm)-based one. In the 50–100 nm α-Fe 2 O 3 NP-based sensing platform, single nucleotide mismatch or single base-pair mismatch can even be effectively discriminated. The targets of micro-RNA (miRNA), ssDNA and double-stranded DNA (dsDNA) are sensitively detected with detection limits of 0.8 nM, 1.1 nM and 0.64 nM ( S / N =3), respectively. Significantly, α-Fe 2 O 3 NPs possess different affinities towards ssDNA probes with different lengths, and can be used as a universal quencher for ssDNA probes labelled with different fluorescent dyes . On the basis of these properties, the pristine α-Fe 2 O 3 NPs hold the potential to be widely utilized in the development of novel biosensors with signal amplification or simultaneous multiple target detection strategies.
研究领域:
生物化学
·
分子生物学
·
分析化学
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DOI
PubMed
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2024
·
IF 4.1
Yue Li,Chen Chen,Yu Sun,Qian Xia,Cuiping Gu,Jiarui Huang
Metal-oxide semiconductor is widely applied in gas sensor for volatile organic compound detection. However, these sensors usually exhibit poor selectivity and inferior sensitivity. Here, ZnO@Fe 2 O 3 microflowers were synthesized using FeOOH microflowers as precursors via a simple solution reaction route, followed by heat treatment. The ZnO@Fe 2 O 3 microflowers were characterized using a series of techniques, and their sensing responses to volatile organic compounds (VOCs) were evaluated in comparison with those of pristine Fe 2 O 3 . The ZnO@Fe 2 O 3 microflower sensor exhibited better responses to several gases, especially acetone, with a response of 74.3 towards 100 ppm acetone, which is 2.85 times higher than that of the Fe 2 O 3 microflower sensor. The sensor also presented high selectivity, reproducibility, and stability in sensing different VOCs. The large specific surface area , heterostructure , favorable hierarchical flower-like nanostructure assembled by the nanosheets , and high porosity of the ZnO@Fe 2 O 3 microflowers contributed to its enhanced gas-sensing responses. Overall, this synthetic strategy for fabricating flower-like ZnO@Fe 2 O 3 nanostructures can be widely applied.
研究领域:
材料科学
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传感器技术
·
化学工程
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DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2021
·
IF 4.641
Wen Ge,Xiaohui Zhang,Xiutao Ge,Kong Liu
Herein, a novel gas-sensing nanocomposite of α-Fe 2 O 3 / x %SiO 2 ( x = 0, 10, 15, 20, 30) was synthesized for the first time by sol-gel. With an increase in SiO 2 concentration to 30 %, the average crystallite size and pore-size distribution of samples exhibited a decreasing trend. The surface area also showed an increasing trend with the introduction of SiO 2 . Gas-sensing measurement results revealed that the α-Fe 2 O 3 /20 %SiO 2 nanocomposite showed the highest response (R a /R g = 50.20) to 500 ppm acetone at its optimal operating temperature of 290 °C, which was about 34 times higher than that of the pure α-Fe 2 O 3 gas sensor. The response/recovery time of the α-Fe 2 O 3 /20 %SiO 2 -based sensor to 500 ppm acetone was 14 s/7 s. The response/recovery time of α-Fe 2 O 3 was 25 s/21 s. After SiO 2 was modified, the response/recovery speed increased. The results demonstrated the potential of α-Fe 2 O 3 /20 %SiO 2 -based gas sensors for sensitive and selective detection of acetone.
研究领域:
材料科学
·
传感器技术
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Yu Lei,Yixing Hao,Hao Cheng,Jianfeng Ma,Yong Qin,Yong Kong,Sridhar Komarneni
Fe 2 O 3 @CeO 2 nanocomposites were synthesized by water bath heating method to activate NaHSO 3 for Orange II dye (50 mg L −1 ) degradation, which reached up to 98.2% within 120 min. The Fe 2 O 3 @CeO 2 and NaHSO 3 dosages and the molar ratios of Ce and Fe in Fe 2 O 3 @CeO 2 were investigated to obtain the optimum conditions as follows: 0.02 g Fe 2 O@CeO 2 , 0.1 g NaHSO 3 and the molar ratio of Ce and Fe was 5:2 (designated as Ce-Fe-1, or simply Fe 2 O 3 @CeO 2 ). In addition, Fe 2 O 3 @CeO 2 catalyst displayed superior catalytic performance to those materials that were previously reported, as verified by the good stability (reached 90.9% after three cycles) and high degradation rate of Orange II (98.2%) of the currently developed material. Existence of · SO 4 – and · OH radicals were verified by Electron Spin Resonance Spectroscopy during degradation, and these radicals are proposed to have high degradation efficiency of Orange II. On the basis of the detected radicals, a possible degradation mechanism was proposed to provide more choices for the application of sulfite in advanced oxidation processes (AOPs).
研究领域:
环境科学
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材料科学
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DOI
高影响因子
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
·
2024
·
IF 5.6
Chenyang Yu,Jianhong Liu,Hongchao Zhao,Mengqing Wang,Jing Li,Xiaopeng She,Yi Chen,Yangjie Wang,Bochao Liu,Cheng Zou,Yong He,Yong Zhou
Acetone plays a critical role in environmental protection and human healthcare, thus necessitating sensitive and selective detection. In this regard, a resistive microelectromechanical system (MEMS) acetone sensor featuring a sensing layer of
$\alpha $
-Fe2O3 nanoparticles modified tungsten trioxide (WO3) nanoplates is utilized in this work. After optimizing the composition proportion and operating temperature, the Fe/W:0.2 sensor delivered a wide detection range (0.05–80 ppm), and an approximately sevenfold higher response of 40.6 toward 10 ppm acetone at
$217~^{\circ }$
C than pure WO3 analog. In addition, a limit of detection (LoD) of 50 ppb was achieved, which ranks among the lowest cases thus far. Together with excellent repeatability, selectivity, and long-term stability, the sensor also showed a humidity-enhanced response. This work offers an alternative strategy to realize trace acetone detection within high-humidity conditions and showcases a huge application potential in exhaled breath-involving diabetes monitoring in the future.
研究领域:
材料科学
·
医学
·
环境科学
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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
·
环境科学
·
电磁学
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产品关联
DOI
高影响因子
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.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
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.
研究领域:
生物医学工程
·
材料科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）