ACS Applied Nano Materials
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2023
·
IF 5.9
Ning Chen,Shaohua Wei,Yongjun Feng,Shui Hu,Ying Tang,Wenqiang He,Yabin Zhang,Ding Cao,Zhifeng Fu
Electromagnetic absorbing materials (EMAs) are materials that irreversibly convert electromagnetic waves into another type of energy. With the development of communication technology, electromagnetic absorption materials have broad prospects in smart phones, wearable devices, and aerospace. MXenes have excellent dielectric loss properties, and the synthesis and application of MXene functional materials with magnetic properties will be one of the hotspots and focuses of future research. In this study, magnetic Co-Ti3C2Tx MXenes were prepared by molten salt etching, and Co-Ti3C2Tx/Fe2O3/polyacrylonitrile (PAN) hollow fiber composites with double-loss capability were prepared by coaxial electrospinning technology. The maximum reflection loss of the Co-Ti3C2Tx/Fe2O3/PAN hollow fiber can reach −54.62 dB at 9.86 GHz, and the effective absorption bandwidth is 6.39 GHz. The Co-Ti3C2Tx/Fe2O3/PAN hollow fibers with excellent electromagnetic absorption capability exhibit potential for efficient EMA materials due to their synergistic effect of impedance matching and magnetic/dielectric loss.
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高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Shuang Pan,Chang Liu,Yanchao Li,Can Wang,Xiaoya Cui,Ning Liu,Cong Zhang,Israel Hakizimana,Xin Zhao,Weidi Liu,Yanan Chen
Heterogeneous electro-Fenton (EF) is a promising advanced oxidation process for refractory wastewater treatment. However, typical calcination or hydrothermal method for heterogeneous EF cathode fabrication is time-consuming, energy-consuming, or harmful to the environment. High-temperature shock (HTS) technique is a novel and rapid material synthesis method with the advantages of low-cost, eco-friendly. In this study, the electrodes named Fe 2 O 3 @C/carbon cloth (Fe 2 O 3 @C/CC), were synthesized by HTS for the first time within an extremely short time (∼5 s). The Fe 2 O 3 nanoparticles with an average diameter of 61.90 ± 15.09 nm are uniformly dispersed on carbon cloth (CC) with the confinement and protection of the carbon layers. The as-prepared Fe 2 O 3 @C/CC cathode exhibited excellent electrocatalytic properties in the EF system. The removal efficiency of methylisothiazolinone (MIT) could reach 90.60 ± 1.70% in 40 min at a low current density of 1.11 mA cm −2 under the oxidation of the hydroxyl radical. In addition, the degradation pathways of MIT were further studied. According to the results of theoretical calculation, the –S–N– bond is the primary active site attacked during MIT degradation process. Therefore, heterocyclic loop opening is the main pathway of MIT degradation. HTS is an ultrafast and convenient potential technique compared with other cathode synthesis methods.
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高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Wenfang Miao,Shaopeng Li,Xingru Cao,Enmin Lv,Hongtao Yu,Xuefeng Zhang,Xinglong Dong
The sluggish kinetics of oxygen reduction reaction at the cathode is one of the obstacles of the next-generation energy conversion system such as fuel cell and Zn-air battery. Here, a simple pyrolysis method was used to transform delignification-treated balsa wood into nitrogen-doped porous layered carbon materials. γ-Fe 2 O 3 nanocrystals were supported on N-doped wood-derived carbon materials. The prepared Fe 2 O 3 -CW 1000 catalyst exhibits superior ORR performance with a high onset potential of 0.98 V RHE in alkaline environment. This is consistent with the potential of commercial Pt/C. The superior ORR activity is attributed to the fact that γ-Fe 2 O 3 nanoparticles promote the activity of Fe-N x sites. And the N-enriched porous carbon matrix facilitates the faster electron movement on the catalyst surface and the full exposure of the active sites.
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高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Jiaxin Luo,Xuzhao Han,Jingmin Ge,Yiping Wang,Xuhui Zhao,Fazhi Zhang,Xiaodong Lei
In our work, a Cu9S5/Fe2O3 composite with nanosphere morphology is prepared by an efficient one-pot solvothermal selective sulfurization. The structure investigation confirms that there is uneven charge distribution at the interfaces of Cu9S5 and Fe2O3. Furthermore, the corresponding electrochemical measurements reveal the detailed redox kinetics process about Cu2+/Cu+, Fe3+/Fe2+, and (S2)−/S2–. When the obtained Cu9S5/Fe2O3 composite is used as a negative electrode, it exhibits a high specific capacity (348.2 mA h g–1 at 1 A g–1) with good rate capability. Moreover, a hybrid capacitor (HCP) assembled with Cu9S5/Fe2O3 as negative and Ni–Co hydroxide/Cu(OH)2/CF as positive electrodes, respectively, shows a high energy density with a corresponding high power density (64.54 W h kg–1 at 757.81 W kg–1) and a high specific capacitance (47 mA h g–1 at 1 A g–1) with a capacity retention of 45.68% (21.5 mA h g–1) even at 20 A g–1 in a solid-state gel electrolyte. Thus, a facial fabricated anode material with outstanding electrochemical properties for HCPs is provided.
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高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2022
·Vol. 105
·期 8
·5325-5335
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IF 4.186
Jinping Wang,Tariq Shamim,Naila Arshad,Muhammad Sultan Irshad,Muhammad Naveed Mushtaq,Chuankun Zhang,Muhammad Yousaf,Lina Abdullah Alshahrani,M. Akbar,Yuzheng Lu
The world population is severely affected by water scarcity, and it is an alarming issue that needs to be addressed urgently. Seawater desalination by solar-driven evaporation is a promising technique to produce clean water. However, it is energy intensive and directs to a low water yield under natural sunlight. Therefore, the developments of new photothermal materials can reduce required energy for desired evaporation rates for efficient freshwater yield. Indeed, chitosan and polypyrrole-based polymers are natural cationic copolymers, and their nanocomposites present well deal of interest for hydrogel structures due to their hydratable skeletons, and solar-absorbing nature. Here, we report in situ polymerized Fe 2 O 3 @PPy/chitosan hydrogels as lightweight evaporation structures for solar-powered evaporation under brine solutions (3.5 wt%). The polymeric network of Fe 2 O 3 @PPy/chitosan hydrogels builds in cross-linked macroporous water channels, self-floating, and a wide range of omnidirectional solar absorption (96%). The state-of-the-art evaporation experiments demonstrate an efficient evaporation rate of water (1.80 kg m –2 h –1 ) and enhanced solar-to-vapor conversion efficiency (91%) as compared to other carbon-based evaporation structures, excluding heat losses under 1 kW m –2 (one sun). Of note, the ultra-black hydrogel surface stored enough thermal energy (39.6°C) under one sun solar irradiance due to the cationic polymeric network of Fe 2 O 3 @PPy/chitosan. A single-step process for a freshwater supply that has been purified from various contaminants shows the potential of this device for real-world applications.
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高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2022
·
IF 5.876
Qingfu Ban,Yuanyuan Liu,Peiyan Liu,Yan Li,Yusheng Qin,Yaochen Zheng
Integrating organic multiple-carbonyl polymers and inorganic mesoporous metal oxides on highly conductive carbon nanotubes is a promising strategy to manufacture high-performance lithium-ion battery anodes; however, developing multicomponent nanocomposites with a hierarchical architecture still remain challenging. Herein, we design and produce hierarchically nanostructured carbon nanotube (CNT)/polyimide (PI)/mesoporous Fe 2 O 3 (meso-Fe 2 O 3 /PI/CNT) ternary nanocomposite materials via a sequential assembly and high-temperature dehydration strategy, aiming to fabricate flexible PI-supported meso-Fe 2 O 3 stacked on a conductive CNT supporting skeleton. By controlling the linear PI mainchain through the comonomer composition, different PI assemblies can grow on the surface of CNT to anchor meso-Fe 2 O 3 nanoparticles as well as alleviate the structural strain resulting from the volume expansion of meso-Fe 2 O 3 in its phase conversion reaction. Considering the porosity and cavity, the mesoporous Fe 2 O 3 architecture can not only buffer its volume expansion but also accommodate a large number of electrolytes to promote Li + transport. In addition, the hierarchical architecture endows the meso-Fe 2 O 3 /PI/CNT nanocomposite materials with a high structural stability during the electrochemical process. Benefiting from these structural advantages, Li-ion batteries assembled with meso-Fe 2 O 3 /PI-EDA/CNT electrodes deliver high capacities of 708.9, 608.2, and 454.5 mAh g −1 at 0.1, 0.3, and 0.5 A g −1 , respectively. Even at a high current density of 1 A g −1 , a discharge capacity of 95.6 mAh g −1 is still obtained after 3000 cycles. This work provides a promising route to integrate multiple-carbonyl polymers and mesoporous metal oxides with the aim of developing multicomponent organic-inorganic composite anode for Li-ion battery.
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高影响因子
Catalysis Science & Technology
·
2022
·Vol. 12
·期 8
·2659-2669
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IF 6.177
Maoqi Li,Jian Wu,Guoliang Shen
Photocatalytic water splitting for hydrogen production and water pollutant degradation is a frontier topic to solve energy and environmental problems. In particular, applying electric and magnetic fields on photocatalysts is the most promising solution to improve their catalytic activity. In this work, bifunctional catalyst PDDA-coated β-Fe2O3 nanoclusters (β-Fe2O3@PDDA) have been successfully synthesized by a simple one-pot method at 200 °C. β-Fe2O3@PDDA exhibits excellent photoelectrocatalytic (PEC) activity for the oxygen evolution reaction (OER) with an overpotential of 300 mV, Tafel slope of 45 mV dec−1 and good catalytic stability. Moreover, β-Fe2O3@PDDA exhibited a good magnetic field-enhanced photocatalytic (MF-PC) RhB degradation activity under artificial simulated sunlight; the photocatalytic efficiency can be improved by 44% under an external magnetic field than that without a magnetic field. The surface PDDA-coated β-Fe2O3 can be stably dispersed in water for more than 10 days without agglomeration, which is of great significance for the MF-PC degradation of water pollutants in practical applications. The high catalytic activity for MF-PC is attributed to the magnetic field-suppressed electron–hole recombination and the spin-polarized properties of β-Fe2O3 in photocatalysis. Our study provides a new strategy for the preparation of highly dispersed β-Fe2O3 nanoclusters under mild conditions and the development of ultrastable organic/inorganic composite photocatalysts. This opens up a new avenue for developing electric and magnetic field-enhanced photocatalysts for use in clean energy and environmental control.
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高影响因子
Crystals
·
2023
·Vol. 13
·期 5
·810
·
IF 2.7
Ruonan Tian,Huai Tan,Gang Chen,Hongtao Guan,Chengjun Dong,Zongyou Yin
Although individual γ-Fe2O3and α-Fe2O3have been widely fabricated for gas sensors, their mixed phase of α/γ-Fe2O3might deliver excellent sensing properties. In this study, a facile solvothermal method was used to fabricate Fe-alkoxide. After thermal treatment, it was converted into γ-Fe2O3, α-Fe2O3and their mixed-phase α/γ-Fe2O3with a nanosheets-assembled flower-like structure. We studied the influence of calcination temperature on the phase and sensing properties on acetone detection. The α/γ-Fe2O3which annealed at 400 °C included 18% α-Fe2O3and it exhibited excellent sensing performance towards acetone compared to that of γ-Fe2O3and α-Fe2O3. It showed a response of 353 to acetone with a concentration of 200 ppm, and a low limit of detection of 0.5 ppm at 160 °C. In addition, the change in responses with acetone concentration from 50 to 200 ppm shows a good linear relationship. Moreover, this material has good reproducibility and selectivity as well as a fast response time of 22 s and recovery time of 14 s to 200 ppm. Therefore, our mixed phase of α/γ-Fe2O3possesses great prospects for acetone detection.Keywords:Fe2O3;phase;gas sensor;acetone;sensing performance
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高影响因子
MICROCHIMICA ACTA
·
2023
·Vol. 190
·期 5
·1-10
·
IF 5.7
Ni Yun,Chen Xiu,Ling Chen,Zhu Ziye,Yue Yao,Wang Jie,He Aolin,Liu Ruijiang
The CYP2C19*2 gene carriers and non-carriers are closely related to the dosage of clopidogrel. To correctly guide the use of clopidogrel and promote individualized therapy, an ultra-sensitive electrochemical biosensor was developed for the detection of CYP2C19*2 gene. The heterogeneous α-Fe 2 O 3 /Fe 3 O 4 nanosheets were prepared via the hydrothermal-calcination process, and the preparation parameters were optimized. The average diameter and thickness of the nanosheets were approximately 150 nm and 53 nm, respectively; and the saturation magnetization was 80.2 emu/g. The α-Fe 2 O 3 /Fe 3 O 4 @Au nanosheets were prepared by sodium borohydride reduction method, and self-assembled to the electrode surface with magnetic field. Ultra-sensitive detection of CYP2C19*2 gene was realized through the recognition ability of strong single base mismatching of peptide nucleic acid and signal amplification effect of magnetic α-Fe 2 O 3 /Fe 3 O 4 @Au nanosheets. Under optimal detection conditions, the current had a good linear correlation with the negative logarithm of CYP2C19*2 gene concentration in the range 1 pM—1 nM, and the detection limit was 0.64 pM (S/N = 3). Meanwhile, the electrochemical signals of target DNA and incomplete complementary DNA were detected. The constructed biosensor exhibited good selectivity, reproducibility, and stability, providing a promising strategy for the detection of other gene mutations by electrochemical biosensors. Graphical Abstract
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PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Yunfei Yao,Zhiying He,Xiangyang Xu,Yuanlin Tong,Dongsheng Chen,Chenyu Huang,Hongye Zhao
Following a flowsheet comprised of a hydrothermal reaction and a dehydration/carbonization, Si-xFe/O@C anodes featured with Fe-doping and carbon encapsulation were assembled. Comparing with pure Si, Si disseminated with in situ generated nano-scaled ferric oxide (Fe 2 O 3 ) particulates displays remarkably improved cyclic performance. Fe 2 O 3 may induce amorphization and optimize electrical conductivity, by enhancing the formation of Fe and Li 2 O amidst charging-discharging cycles. The as-derived Fe phase benefits the transport and storage of lithium-ion and electrons. Meanwhile, numerous tiny interfaces can be constructed between Fe granules and adjacent Li x Si or Li 2 O, and generate pseudocapacitance. After the carbonization of resorcinol-formaldehyde resin encapsulated on Si granules, core-shell structured Si- x Fe/O@C particulates can be assembled. Owing to the synergism of defect-rich structure, carbon layer well-wrapped thereon and interfacial pseudocapacitance, these nanocomposite anode materials exhibit long cyclic and upgraded rate performance. After 200 cycles, Si-0.42Fe/O@C anode retains a capacity of 929 mAh·g −1 at 1 A·g −1 and 735 mAh·g −1 at 2 A·g −1 . In the rate performance test operated at 5 A·g −1 , a high current density, 844 mAh·g −1 could be released. Si-0.42Fe/O@C can be charged with a specific capacity exceeding 250 mAh·g −1 over the potential range of 0.75-3 V at various current densities, demonstrating the contribution of nano-Fe pseudocapacitance effect to the energy storage of Si anodes.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Borui Du,Ruichi Li,Yanghong Zhang,Xingyu Chen,Rencai Tao,Zihang Qin,ChaoPing Fu,Jingran Xiao
Morphology regulation and surface modification are crucial strategies to improving the photoelectrochemical water oxidation performance of Fe 2 O 3 photoanodes. In this study, Pluronic F127-assisted synthesis and post-treatment were adopted to achieve surface modification of FeOOH nanorods prepared by hydrothermal technique, thereby adjusting the morphology and surface properties of Fe 2 O 3 photoanodes after calcination . Although the morphology of FeOOH barely changed, the creation of porous nanorods through F127-assisted synthesis and morphological change from worm-like nanorods into nanoplates by F127-assisted post-treatment were realized, and the electrochemically active surface area, crystallinity , number of surface disorders, and photoabsorption property were affected. Furthermore, relatively high intensity of lattice defects and low-valent ferrous ions (Fe 2+ ) were generated after F127-assisted synthesis, and charge transfer from the surface states was increased. Consequently, Fe 2 O 3 photoanode subjected to F127-assisted synthesis exhibited a reduction in the onset potential by 60 mV. The photocurrent density of Fe 2 O 3 increased by 77% at 1.23 V versus reversible hydrogen electrode following a synergistic effect of F127-assisted synthesis and post-treatment.
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高影响因子
FUEL
·
2021
·
IF 6.609
Zhong Ma,Guofu Liu,Yonggang Lu,Hui Zhang
Iron-based oxygen carriers often underwent severe phase segregation in the process of chemical looping, resulting in the reduction of the cyclic performance of oxygen carriers. The phase segregation characteristics of Fe 2 O 3 /Al 2 O 3 calcined at different temperature (900 °C, 1100 °C, 1300 °C) were investigated in this study. The obtained samples were recorded as 900-FeAl, 1100-FeAl and 1300-FeAl, respectively. XPS results showed that the surface oxygen vacancies of Fe 2 O 3 /Al 2 O 3 increased with the increase of calcination temperature. In the redox cycles, the deactivation rate of the three samples were 5.57% (900-FeAl), 6.99% (1100-FeAl) and 31.69% (1300-FeAl), respectively. After 20 cycles, the 1300-FeAl presented serious surface sintering and the largest enrichment degree of surface Fe (137.05%). It can be inferred that the severe enrichment of surface Fe leads to the serious sintering, which aggravates the deactivation of the 1300-FeAl in cyclic reactions. The low calcination temperature (900 °C, 1100 °C) makes the Fe 2 O 3 /Al 2 O 3 exhibit rich pore structure, which generates space barrier for the outward migration of Fe cation and inhibits the phase segregation of Fe 2 O 3 /Al 2 O 3 . The results of this study are of great significance to understand the phase segregation of iron-based oxygen carriers, and provide guiding value for the synthesis of high-performance iron-based oxygen carriers.
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高影响因子
危险品化学品经营许可证（带存储）