MATERIALS & DESIGN
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2022
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IF 9.417
Qianqian Chen,Panpan Lin,Xuanyu Du,Hiroyuki Inoue,Kazuro Kizaki,Tiesong Lin,Peng He
A new low-temperature magnetic Bi 2 O 3 -CoO-Fe 2 O 3 -B 2 O 3 (BCFB) glass was designed to acquire magnetic yttrium iron garnet (YIG/YIG) joint. This paper investigated the thermal behavior of BCFB glass and its wettability on YIG. The microstructural evolution, mechanical and electromagnetic properties of YIG/YIG joint were systematically studied. CoFe 2 O 4 nuclei were gradually formed, growing up into nano-scale CoFe 2 O 4 crystals in the glass seam. Meanwhile, some CoFe 2 O 4 crystals grew up excessively by swallowing nano CoFe 2 O 4 , reaching microns. YBO 3 reaction layer was formed and grew into YBO 3 whiskers at the interface of YIG/glass with the brazing temperature increasing. The joint shear strength increased, reaching a maximum of 85.2 MPa at 775 °C under the collaborative reinforcement of well-integrated interface and glass-ceramic seam, then declined due to the aggravative reaction. The dielectric constant of YIG/YIG joints decreased with the brazing temperature increasing, varying from 18.5 to 16.6 at the frequency of 10 MHz. AFM/MFM and VSM analyses indicate that the glass seam performed magnetic property. The saturation magnetization of BCFB glass reached about 4.2 emu/g and 5.0 emu/g heat-treated at 750 °C and 775 °C, respectively, which could effectively enhance the magnetism of the glass seam.
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高影响因子
Journal of Cleaner Production
·
2022
·
IF 11.072
Hua Chai,Chunyan Yang,Peng Xu,Peng Wang,Jianhua Qu,Guangshan Zhang
Heterojunction photocatalysts Fe 2 O 3 –ZnO@C/g-C 3 N 4 (FZCCN) were prepared by precipitation and calcination in this study. Systematic characterization demonstrated that the tight interfacial contact was established between Fe 2 O 3 –ZnO@C and g-C 3 N 4 , and the FZCCN-4 (theoretical mass ratios of ZnO and g-C 3 N 4 was 4) had large BET surface area (110.136 m 2 g −1 ). Bisphenol A (BPA) was selected to estimate the photocatalytic properties of FZCCN and the degradation reaction kinetics was analyzed at the same time. The results showed that, FZCCN-4 had the highest removal rate of BPA (100%, 60 min). The degradation rate of BPA by using FZCCN-4 was approximately 32 and 130 times higher than that of g-C 3 N 4 and Fe 2 O 3 –ZnO@C, respectively. ·O 2 − was proved to be the main active species by capture experiment and electron spin resonance. The UV–vis and PL results proved the formation of heterojunction in FZCCN. This study also identified the intermediates of BPA degradation and tested their toxicity. The excellent visible light catalytic performance of Fe 2 O 3 –ZnO@C/g-C 3 N 4 makes it an ideal material for degrading contaminants.
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高影响因子
Green Energy & Environment
·
2022
·
IF 12.781
Jiakai Li,Changpeng Lv,Jiajia Song,Xiaoling Zhang,Xizhen Huang,Yingzhuo Ma,Haijie Cao,Na Liu
Superwetting materials have drawn unprecedented attention in the treatment of oily wastewater due to their preferable anti-fouling property and selective oil/water separation. However, it is still a challenge to fabricate multifunctional and environmentally friendly materials, which can be stably applied to purify the actual complicated wastewater. Here, a Ag/α-Fe 2 O 3 heterostructure anchored copper mesh was intentionally synthesized using a facile two-step hydrothermal method. The resultant mesh with superhydrophilicity and underwater superoleophobicity was capable of separating various oil/water mixtures with superior separation efficiency and high permeation flux driven by gravity. Benefiting from the joint effects of the smaller band gap of Ag/α-Fe 2 O 3 heterojunction, inherent antibacterial capacity of α-Fe 2 O 3 and Ag nanoparticles, favorable conductive substrate, as well as the hierarchical structure with superwettability, such mesh presented remarkably enhanced degradation capability toward organic dyes under visible light irradiation and antibacterial activity against both Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ) compared with the pure α-Fe 2 O 3 coated mesh. Impressively, the mesh exhibited bifunctional water purification performance, in which organic dyes were eliminated simultaneously from water during oil/water separation in one filtration process. More importantly, this mesh behaved exceptional chemical resistance, mechanical stability and long-term reusability. Therefore, this material with multifunctional integration may hold promising potential for steady water purification in practice.
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高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Shemsu Ligani Fereja,Ping Li,Ziwei Zhang,Jinhan Guo,Zhongying Fang,Zongjun Li,Wei Chen
Electrocatalytic water splitting is a promising process as it can effectively convert renewable electricity to chemical energy such as hydrogen gas. However, the energy conversion efficiency of water splitting process is fundamentally dependent on the catalytic activity of selected electrocatalyst . In particular, one of the main reasons that hinder the practical application of water splitting system is the sluggish kinetics of oxygen evolution reaction (OER). Hence, earth-abundant elements-based catalysts with excellent OER catalytic performance is significantly important. Herein, MOF-derived NiCo 2 S 4 /Fe 2 O 3 hybrid nanostructure grown on carbon cloth (NiCo 2 S 4 /Fe 2 O 3 @CC) was successfully fabricated as OER catalyst. Benefiting from the merits of unique architecture with hybrid heterostructure grown on carbon cloth, high porosity and abundant active sites , the designed NiCo 2 S 4 /Fe 2 O 3 @CC demonstrated superior electrocatalytic performance toward the OER. The fabricated NiCo 2 S 4 /Fe 2 O 3 @CC catalyst exhibited very low overpotential of 190 mV to achieve a current density of 10 mA cm −2 and a small Tafel slope of 45 mV dec −1 . Furthermore, the as-fabricated catalyst demostrated remarkable stability. The present work provides an effective method to fabricate novel metal sulfide and metal oxide hybrids for OER catalysis.
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高影响因子
JOURNAL OF NANOBIOTECHNOLOGY
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2021
·Vol. 19
·期 1
·1-14
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IF 10.435
Zhang Tian,Zheng Qiang,Fu Yike,Xie Congkun,Fan Gonglin,Wang Yifan,Wu Yongjun,Cai Xiujun,Han Gaorong,Li Xiang
Sonodynamic therapy (SDT), presenting spatial and temporal control of ROS generation triggered by ultrasound field, has attracted considerable attention in tumor treatment. However, its therapeutic efficacy is severely hindered by the intrinsic hypoxia of solid tumor and the lack of smart design in material band structure. Here in study, fine α-Fe 2 O 3 nanoparticles armored with Pt nanocrystals (α-Fe 2 O 3 @Pt) was investigated as an alternative SDT agent with ingenious bandgap and structural design. The Schottky barrier, due to its unique heterostructure, suppresses the recombination of sono-induced electrons and holes, enabling superior ROS generation. More importantly, the composite nanoparticles may effectively trigger a reoxygenation phenomenon to supply sufficient content of oxygen, favoring the ROS induction under the hypoxic condition and its extra role played for ultrasound imaging. In consequence, α-Fe 2 O 3 @Pt appears to enable effective tumor inhibition with imaging guidance, both in vitro and in vivo. This study has therefore demonstrated a highly potential platform for ultrasound-driven tumor theranostic, which may spark a series of further explorations in therapeutic systems with more rational material design. Graphical Abstract
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PubMed
高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Meiwan Chen,Dechao Niu,Jiayi Mao,Guangyu Jiang,Kaiyuan Li,Gaoxu Huang,Xiaopan Jin,Yongsheng Li
Though great progresses have been made on improving the volume effect and electronic conductivity of anode materials in sodium-ion batteries (SIBs), the electrical performance at high current density for long cycling stability is still a huge challenge. To address this, a facile confined-impregnation/crystallization strategy is developed to construct a movable Fe2O3 core in nitrogen-doped hierarchical porous carbon nanospheres (MFe2O3@N-HCNs) for ultrafast intercalation/deintercalation of SIBs. The as-prepared MFe2O3@N-HCNs not only exhibit a connected and hierarchal porous structure with large surface specific area (∼367 m2 g–1) but also possess a highly dispersed and moveable Fe2O3 core (∼5 nm) for the tolerance of volume expansion during the intercalation/deintercalation process of sodium ions. As SIBs anode materials, the MFe2O3@N-HCNs anode exhibits a capacity of 417 mAh g–1 at 0.1 A g–1 after 100 cycles and of 364 mAh g–1 at 2 A g–1 with 4500 cycles. Especially, a prominent discharge capacity of 102 mAh g–1 is still obtained at 5 A g–1 after 10000 cycles. Such remarkable performances should be attributed to the unique highly dispersed and moveable Fe2O3 core and conductive nitrogen-doped hierarchical porous carbon framework with large surface area. Consequently, this study develops a facile methodology to promote the energy storage and long cycling performance of hierarchically porous carbon@transition-metal oxide (TMO) composite anode materials for SIBs, especially at high current density.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2021
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IF 7.46
Chen Wang,Yinglin Wang,Pengfei Cheng,Luping Xu,Fan Dang,Tianliang Wang,Zhaohui Lei
A highly sensitive and selective acetone gas sensor has been fabricated successfully by designing n-n heterojunction consisting of TiO 2 nanorods and α -Fe 2 O 3 branches. The structure and morphology of the TiO 2 / α -Fe 2 O 3 nanocomposites were examined via X-ray diffraction and scanning electron microscopy, respectively. TiO 2 nanorod (with the diameter about 42 nm) arrays were in-situ generated on the surface of Al 2 O 3 ceramic tubes by a simple hydrothermal process. In addition, α -Fe 2 O 3 branches grew on TiO 2 stems successfully in the second hydrothermal process. These nanorod branches had a relatively uniform length, which could be tunable by changing the concentration of iron precursor. The gas sensing properties of the pristine and α -Fe 2 O 3 branches-decorated TiO 2 nanorods sensors with regard to acetone gas were investigated. The results indicated that the sensor based on TiO 2 / α -Fe 2 O 3 heterostructures measured at 225 °C had a higher response of 21.9 toward 100 ppm of acetone gas which was about 9 times higher than pristine TiO 2 nanorods sensor. The dominant mechanism for enhanced sensing properties were discussed in detail with the semiconductor depletion layer model and TiO 2 / α -Fe 2 O 3 n–n heterojunction theory.
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高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Run Huang,Yanfei Li,Wenbin Liu,Yonghai Song,Li Wang
N-doped honeycomb-like carbon networks (N–HCN) loaded with ultra-fine Fe 2 O 3 nanoparticles (Fe 2 O 3 /N–HCN) are proposed as anode materials for lithium-ion batteries (LIBs). The Fe 2 O 3 /N–HCN nanocomposites are prepared by freeze-drying of glucose-Fe(NO 3 ) 3 solution, following by grinding it with urea, and finally annealing treatment. The N–HCN with dozen micrometer-sized macropores is composed of carbon nanosheets with a thickness of about 33 nm. A large number of 2–7 nm-sized ultra-fine Fe 2 O 3 nanoparticles with an average size of 4.4 nm are uniformly arrayed on the wall of N–HCN. The Fe 2 O 3 /N–HCN nanocomposites exhibit good performances as anode materials for LIBs. After 500 cycles under a large current density of 5 A g −1 , the Fe 2 O 3 /N–HCN nanocomposites still show a reversible capacity of 408 mAh g −1 . The good performance can be ascribed to the uniformly dispersed ultra-fine Fe 2 O 3 nanoparticles and unique honeycomb-like structure of N–HCN which provides a continuous conductive network to greatly promote the rapid transfer of ions and electrons, and effectively alleviate the volume fluctuation effect of Fe 2 O 3 during charging and discharging. More importantly, the cheap and environmentally friendly glucose as raw materials provides possibility for green energy applications.
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高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 31
·期 13
·135403
·
IF 3.551
Taowen Dong,Ting Deng,Xianyu Chu,Tingting Qin,Haoxiang Wang,Zizhun Wang,Wei Zhang,Weitao Zheng
Earth-abundant Fe2O3 is a promising material for the negative electrode of supercapacitors by virtue of its wide potential windows. However, the unsatisfactory electrical conductivity and poor ionic diffusion rate within Fe2O3 results in degraded electrochemical performance. In this work, to address these issues, we demonstrate an easy method to synthesize Fe-based zeolitic imidazolate framework (Fe–ZIF) derived α–Fe2O3@C with remarkable supercapacitive properties. The as-obtained α–Fe2O3@C electrode, with the particular benefit of dispersed distribution of carbon, enabling fast electrochemical response, presents a prospective specific capacitance of 161 Fg−1 at a current density of 1 Ag−1. Furthermore, by using the α–Fe2O3@C architecture as the negative electrode, we fabricated a supercapacitor with Na0.5MnO2 as the positive electrode. Our supercapacitor shows a high energy density of 25 Whkg−1, while the corresponding power density is 2400 Wkg−1 at a current density of 2 Ag−1.
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PubMed
高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 31
·期 12
·125405
·
IF 3.551
Yuzhu Guan,Peiyuan Ji,Jing Wan,Dazhi Zhang,Zhao Wang,Hao Tian,Chenguo Hu,Baoshan Hu,Qing Tang,Yi Xi
By exploiting the storage performance of supercapacitors, iron has the potential to be used as a new anode material. However, this potential is limited by unsatisfactory electrical conductivity and poor cycling stability which impact the energy and power density. Consequently a foundation for improving the electrical conductivity and cycling stability of iron materials to obtain good storage performance is needed. In this work, Ag-modified Fe2O3 nanoparticles on carbon cloth were synthesized as an anode material for supercapacitors. The specific capacitance of the composite material reaches 10.39 F cm−2 (2734.2 F g−1) at a current density of 1 mA cm−2 and remains at 83% of this value after 12 000 cycles. The energy density is 379.8 Wh kg−1 at a power density of 131.6 W kg−1 and remains at 123.9 Wh kg−1 at a power density of 2631.6 W kg−1. The electrical conductivity and interfacial effect created between Ag@Fe2O3 is confirmed with density functional theory calculations. The packaged asymmetric supercapacitor devices have flexibility and can light ten LEDs for 2 min 30 s, with an energy density of 60.3 Wh kg−1 that can be reached at a power density of 1063.8 W kg−1 and remain at 16 Wh kg−1 even at a power density of 4255.3 W kg−1.
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高影响因子
MATERIALS RESEARCH BULLETIN
·
2020
·
IF 4.019
Jun Liu,Lingling Sun,Guangli Li,Jue Hu,Quanguo He
In this study, spindle-like α-Fe 2 O 3 mesocrystals/reduced-graphene-oxide composites modified glassy carbon electrode (α-Fe 2 O 3 /rGO/GCE) is developed for ultrasensitive electrochemical detection of DA. Morphologies and crystal structures of this composite are characterized by SEM, TEM , XRD , Raman spectrum, and XPS , respectively. The electrochemical behavior of DA on these electrodes are investigated by CV and EIS . The electrochemical conditions are optimized systematically. As results, the oxidation current of DA on α-Fe 2 O 3 /rGO/GCE is 38.13-fold increase than that on bare GCE. It is ascribed to the high catalytic activity of α-Fe 2 O 3 mesocrystals and large electrochemical active area of rGO. Under the best voltammetric condition, wide linear detection range (from 1.0×10 −8 to 9.0×10 -4 mol/L) and low LOD of 3.26 nM (S/N=3) are obtained on the α-Fe 2 O 3 /rGO/GCE. Furthermore, this electrode is also used for DA detection in real human serums samples successfully. This α-Fe 2 O 3 /rGO/GCE provides a good example in design of other mesocrystals-based composite materials for electrochemical detection.
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高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2019
·
IF 4.914
Ruowen Liang,Zhiyu Liang,Feng Chen,Danhua Xie,Yanling Wu,Xuxu Wang,Guiyang Yan,Ling Wu
Magnetically recyclable porous sodium dodecyl sulfate (SDS)/Fe 2 O 3 hybrids, which combine the porous structure of Fe 2 O 3 and hydrophobicity of SDS, have been successfully synthesized for the first time. Porous Fe 2 O 3 has been first pyrolyzed from MIL-100(Fe) using a simple two-step calcination route. Then, the obtained porous Fe 2 O 3 nanoparticles have been self-assembled with SDS molecules and yielded hydrophobic SDS/Fe 2 O 3 hybrids. The porous SDS/Fe 2 O 3 hybrids have been demonstrated to be highly efficient for the denitrification of pyridine under visible light irradiation. The pyridine removal ratio has reached values as high as 100% after irradiation for 240 min. Combining the results of a series of experimental measurements, it was concluded that the superior photocatalytic performance of SDS/Fe 2 O 3 hybrids could be attributed to (i) the fast electron transport owing to the unique porous structure of Fe 2 O 3 , (ii) the superior visible light absorption of Fe 2 O 3 nanoparticles, and (iii) the “bridge molecule” role of SDS efficiently improving the separation and transfer across the interfacial domain of SDS/Fe 2 O 3 of photogenerated electron-hole pairs. More significantly, after the catalytic reaction , the SDS/Fe 2 O 3 hybrids could be easily recovered using magnets and reused during subsequent cycles, which indicated their stability and recyclability.
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高影响因子
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