RSC Advances
·
2016
·Vol. 6
·期 32
·26800-26808
·
IF 3.289
Aijun Zhou,Bin Yang,Weihang Wang,Xinyi Dai,Mingjuan Zhao,Jing Xue,Mangui Han,Cong Fan,Jingze Li
Cu3P is a potential anode material for lithium-ion batteries with its comparable gravimetric capacity, but several times higher volumetric capacity (4732 mA h cm−3) than graphite. However, the cycling stability of Cu3P is poor at low discharge potentials and high current densities. In this work, Fe addition is employed as a simple strategy to modulate the composition and phase constitution of Cu3P nanopowders synthesized by wet mechanical alloying, and thereby to tune the electrochemical performance of the anode. The addition of Fe results in a composite constitute containing Cu3P as the major phase and some other minor phases including Cu, α-Fe and FeP, which are combinationally determined by X-ray diffraction, energy dispersive X-ray spectroscopy and Mössbauer spectroscopy. Electrochemical tests reveal that both the cycling stability and the rate capability of the electrodes are improved by Fe addition. The Cu3P electrode with 10% Fe addition shows the best cell performance, with the capacity being remarkably improved by over 100%, from 82 mA h g−1 to 178 mA h g−1 after 50 cycles at 0.75C between 2.0 V and 0.5 V vs. Li/Li+. The improvement of the electrochemical performance is engendered by a synergetic effect of the microstructure change of the powders and the presence of Fe-related minor phases, leading to increased electronic conductivity as well as enhanced electrochemical reversibility of the electrode.
✓ 已验证
DOI
高影响因子
Science China-Physics Mechanics & Astronomy
·
2016
·Vol. 59
·期 5
·1-5
·
IF 1.575
Lin Hai,Xing Jie,Zhu XiYu,Yang Huan,Wen Hai-Hu
The recently discovered (Li 1- x
Fe
x
)OHFeSe superconductor with T
c
about 40 K provides a good platform for investigating the magnetization and electrical transport properties of FeSe-based superconductors. By using a hydrothermal ion-exchange method, we have successfully grown crystals of (Li 1- x
Fe
x
)OHFeSe. X-ray diffraction on the sample shows the single crystalline PbO-type structure with the c-axis preferential orientation. Magnetic susceptibility and resistive measurements show an onset superconducting transition at around T
c
=38.3 K. Using the magnetization hysteresis loops and Bean critical state model, a large critical current J
s
is observed in low temperature region. The critical current density is suppressed exponentially with increasing magnetic field. Temperature dependencies of resistivity under various currents and fields are measured, revealing a robust superconducting current density and bulk superconductivity.
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2016
·
IF 3.014
Yanqing Lai,Wenwen Liu,Jie Li,Kai Zhang,Furong Qin,Mengran Wang,Jing Fang
Fe-doped mesoporous anatase TiO 2 /amorphous carbon composites (FC–TiO 2 ) are synthesized by a wet chemistry process. With Fe-doping concentration increasing, the microstructures of FC-TiO 2 change from prism to nanoparticle , and finally turns block structure. When used as anode materials for sodium ion batteries, the FC-TiO 2 electrodes exhibit a maximum capacity of 304 mA h g −1 at 0.1 A g −1 after 50 cycles with good rate capability (198 mA h g −1 at 2 A g −1 ). Three synergic effects can be attributed to the improved electrochemical performance of FC-TiO 2 : (1) the high iron doping could largely narrow the band gap and restrain the growth of TiO 2 crystallite ; (2) the carbon coating offers a beneficial conductivity environment; (3) the porous structure can shorten the electronic sodium ion pathway during cycling. Moreover, this synthesis method is very easy for mass production. Therefore, FC-TiO 2 should be an attractive and promising candidate for anode material of SIBs.
✓ 已验证
DOI
高影响因子
Nanoscale
·
2016
·Vol. 8
·期 13
·7309-7317
·
IF 7.76
Ziya Wang,Fengping Wang,Yan Li,Jianlin Hu,Yanzhen Lu,Mei Xu
Structure designing and morphology control can lead to high performance pseudocapacitive materials for supercapacitors. In this work, we have designed interlinked multiphase Fe-doped MnO2 nanostructures (α-MnO2/R-MnO2/ε-MnO2) to enhance the electrochemical properties by a facile method. These hierarchical hollow microspheres assembled by interconnected nanoflakes, and with plenty of porous nanorods radiating from the spherical shells were hydrothermally obtained. The supercapacitor electrode prepared from the unique construction exhibits outstanding specific capacitance of 267.0 F g−1 even under a high mass loading (∼5 mg cm−2). Obviously improved performances compared to pure MnO2 are also demonstrated with a good rate capability, high energy density (1.30 mW h cm−3) and excellent cycling stability of 100% capacitance retention after 2000 cycles at 2 A g−1. The synergistic effects of alternative crystal structures, appropriate crystallinity and optimal morphology are identified to be responsible for the observations. This rational multiphase composite strategy provides a promising idea for materials scientists to design and prepare scalable electrode materials for energy storage devices.
✓ 已验证
DOI
高影响因子
Journal of Materiomics
·
2023
·Vol. 10
·期 1
·37-44
·
IF 9.4
Wenxiu Li,Su Dun,Bin Xiao,Jun Wang,Xinba Yaer,Chun Ying,Ye Li,Xiaohuan Wang,Huijun Kang
Cu 2 Te-based materials are a type of superionic conductor belonging to the class of phonon-liquid electron-crystal materials and have achieved high ZT values by doping and nanostructuring. However, it is easy to form copper vacancies in Cu 2 Te which leads to an excessive carrier concentration and then results in a low Seebeck coefficient. Hence, controlling copper ion migration and optimizing carrier concentration is essential to improve the thermoelectric performance of Cu 2 Te. This paper reports high-performance Cu 2 Te Ag 2 Te composite with high application value in the low-middle temperature region, which is achieved by fine tuning the carrier concentration using Fe addition and non-stoichiometric Te, as well as controlling the thermal conductivity of composite. A high ZT of ∼1.2 is obtained in AgCu 0.97 Fe 0.03 Te 0.96 at a low temperature of 573 K. Meanwhile, the phase transition mechanism of Cu 2 Te Ag 2 Te and its effect on the thermoelectric transport performance are revealed that go beyond nanostructuring and single-doping, which provides a strong theoretical basis for research and performance improvement of thermoelectric materials in this system.
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Shi-Wen Lv,Qiuyu Zheng,Lingjie Ye,Chun-Yang Li,Jing-Min Liu,Yanqing Cong,Shuo Wang
Nowadays, simultaneous removal of organic pollutants and heavy metals from wastewater is still a complicated task with great challenge. Herein, a newly-designed Fe-g-C 3 N 4 /α-Fe 2 O 3 composite with an active N-Fe-O bridge was prepared by coupling Fe-doped g-C 3 N 4 (namely Fe-g-C 3 N 4 ) and α-Fe 2 O 3 . Interestingly, the combination of Fe-g-C 3 N 4 with α-Fe 2 O 3 broadened the light absorption region and restrained the photoinduced electron-hole pair recombination. Meanwhile, elaborate construction of N-Fe-O bridges based on coordination interaction can reduce electrochemical impedance and facilitate electron transfer, thereby prolonging the charge lifetime. As expected, the Fe-g-C 3 N 4 /α-Fe 2 O 3 composite displayed excellent photocatalytic performance in simultaneous removal of tetracycline (TC) and Cr(VI). More importantly, Fe-g-C 3 N 4 /α-Fe 2 O 3 -mediated electron transfer from TC to Cr(VI) also played an essential role on TC oxidation and Cr(VI) reduction under visible light. Both experimental analyses and theoretical calculations revealed that the migration route of photogenerated carriers followed a direct Z-scheme heterojunction mechanism under built-in electric field. The Fe-g-C 3 N 4 /α-Fe 2 O 3 composite with great stability also displayed promising practical application potential. In short, the current work not only provided a highly-efficient photocatalyst with N-Fe-O bridges but also shared new insights into the simultaneous removal of organic pollutants and heavy metals.
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2025
·
IF 8.1
Qianying Zong,Xiaofei Niu,Xin Cheng,Yifan Liu,Cong Liu,Tingyue Shi,Jiapeng Liu,Xiaohong Yang,Wentao Wang,Zikuan Guo,Fengjuan Xiao
Nanoscale FeWO 4 /BiVO 4 heterojunctions were directly grown on the graphite fiber felt (GF) with good conductivity to construct a FeWO 4 /BiVO 4 @GF solar photo-Fenton like wastewater treatment system. The removal effect of COD from phenolic wastewater and the mechanism of synergistic improvement of wastewater treatment efficiency by this system were investigated. The FeWO 4 /BiVO 4 heterojunction prepared by hydrothermal method exhibited higher photoelectric conversion efficiency and solar light utilization rate, thus endowing FeWO 4 /BiVO 4 with excellent solar-Fenton like reaction activity.The photo-Fenton activity can be maintained well even within the pH range of 2–8. Loading FeWO 4 /BiVO 4 nano-heterojunction on GF helped to increase the contact area between Fenton reagents and wastewater, facilitate the electron transfer on the FeWO 4 /BiVO 4 heterojunction and enable the recovery and reuse of the Fenton reagents.Under solar light radiation, the COD removal efficiency of FeWO 4 /BiVO 4 @GF/H 2 O 2 system in phenolic wastewater was more than 92%. Even after five cycles, the system still exhibited excellent operation stability. FeWO 4 /BiVO 4 @GF promoted the conversion and cycling of Fe(III)/Fe(II) by accelerating the separation and transport of photogenerated electrons/holes and increasing the concentration of active species, thereby stimulating excellent solar photo-Fenton like activity.The results are significance to the development of green and efficient photo-Fenton process for advanced treatment of industrial wastewater.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Min Jiang,Xiangyu Wang,Renchan Han,Ping Ning,Iseult Lynch,Jun Ma
A S-scheme Fe/Fe 2 O 3 @CBO photocatalyst was synthesized via a grinding calcination method, proficiently degrading tetracycline via radicals and non-radical. The reaction rate of Fe/Fe 2 O 3 @CBO-20 was recovered to 0.0255 min −1 that is 4.3 and 7.3 times as many as pristine Fe/Fe 2 O 3 and CBO after introducing visible light at the degradation process. The characterization outcomes also bear out that the S-scheme heterojunction is formed by passivation layer Fe 2 O 3 and CBO, which enhances the visible light responsiveness of catalyst and promotes the separation and transfer of photogenerated electrons to generate h + and O 2 − . Meanwhile, the molecular oxygen is more easily activated to form H 2 O 2 due to the strong reduction potential of the CB (−1.21 eV), further to facilitate the transformation of O 2 − to 1 O 2 . And the carriers excited in CBO activate Cu + , forming a Cu/Fe dual-metal electron cycle. The generated Fe 2+ reacts with H 2 O 2 to establish photocatalysis-self-Fenton system to generate ·OH. Additionally, the high TC removal in simulated aquatic environment exhibit that the catalytic performance is slightly affected by practical wastewater and the cyclic experiment show the stability and practicality. In conclusion, innovatively employing Fe/Fe 2 O 3 for pollutant degradation via photocatalytic technology, this research paves a promising and efficacious pathway for the application of Fe/Fe 2 O 3 .
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Peng Wang,Ruiliang Wang,Chenyu Gao,Lianlian Wang,Qianpeng Dong,Dianming Chu,Yan He,Wenjuan Bai
During the catalytic growth of CNTs, the ordered arrangement of catalysts is critical for maintaining their array structure. Unlike mechanisms that suppress nanoparticle migration via high catalyst density to enforce CNTs array growth, this study proposes a strategy involving surface engineering and nanoparticle nucleation to construct Mo-Fe-S/Al 2 O 3 heterogeneous ternary catalysts. This method modulates the electronic density of Fe sites to activate catalytic activity while constructing Mo-Fe-S sites on the catalyst surface to catalyze the growth of a "C network" (carbon pillars and CNTs), thereby forming CNTs arrays. On one hand, S and Mo weaken the interfacial interactions between Al 2 O 3 and inactive FeO x nanoparticles, promoting active particle nucleation; on the other hand, the "C network" grown via Mo-Fe-S constitutes the top part of the CNTs arrays, confining the internal nanoparticles (NPs) to enable vertically aligned growth of CNTs. Characterizations reveal NPs with diameters of ∼20 nm and symmetrically grown CNTs arrays with average diameters and heights of 18.21 nm and 10.10μm, respectively. This work provides an approach for the catalytic growth of CNTs arrays using supported catalysts, by forming a "C network" to suppress the entanglement of NPs during the catalytic growth of CNTs, thereby forming the CNTs array structure.
✓ 已验证
产品关联
DOI
高影响因子
AICHE JOURNAL
·
2025
·
IF 4
Ruishao Mao,Mengqi An,Xuanbei Peng,Tianhua Zhang,Ming Chen,Lei Zhang,Kailin Su,Yanliang Zhou,Jun Ni,Lirong Zheng,Xiuyun Wang,Lilong Jiang
The development of efficient catalysts enabling the Haber–Bosch ammonia (NH 3 ) synthesis process under mild conditions is crucial. However, the competitive activation of co-adsorbates, that is, excessive N 2 or H 2 binding at a single active site, is detrimental to NH 3 synthesis. Herein, we demonstrate that Fe 2 O 3 mediated by fullerenes (C 60 /C 70 ) with varying geometric configurations could facilitate efficient NH 3 synthesis under mild conditions (≤400°C, ≤2 MPa). Our studies indicate that C 70 exhibits a higher curvature than C 60 , which enhances electron transfer through Fe–O–C bridges. This curvature-driven electronic modulation, combined with the spatially separated activation of N 2 (primarily on Fe sites) and H 2 (mainly on C 60 /C 70 ), synergistically enhances the dissociation of N 2 and the desorption of NH 3 . As a consequence, the developed C 70 -Fe 2 O 3 achieves an NH 3 synthesis rate of 19.10 mmol g −1 h −1 . This finding demonstrates a strategy for optimizing dual-functionality sites through selecting fullerenes with different geometric structures.
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Chemistry
·
2026
·
IF 7.4
Rui Huang,Shaohua Luo,Qi Sun,Lixiong Qian,Shengxue Yan
Although lithium-ion batteries (LIBs) offer high energy density and long cycle life, their large-scale application is hindered by the scarcity and high cost of lithium resources. sodium-ion batteries (SIBs) have emerged as a promising alternative for large-scale energy storage due to the abundance and low cost of sodium. However, the development of high-performance SIBs is impeded by structural instability in cathode materials, primarily caused by the relatively large ionic radius of Na + , which induces lattice strain and phase transitions during cycling. In this work, a Fe/Ti co-doped tunnel-type sodium manganese oxide cathode material, Na 0.55 Mn 0.9 Fe 0.05 Ti 0.05 O 2 (NaMO55-FT5), was successfully synthesized via a high-temperature solid-state method. The structural evolution and electrochemical behavior of the material were systematically investigated. It was found that synergistic Fe/Ti doping effectively expanded Na + interlayer spacing, mitigated Jahn-Teller distortion through Mn 3+ stabilization, and disrupted Na + /vacancy ordering, thereby enhancing both Na content and structural integrity. As a result, the NaMO55-FT5 material delivered an initial discharge capacity of 98.5 mAh g −1 at 0.5C, retains 72.0% of its capacity after 300 cycles, and maintained a reversible capacity of 55.2 mAh g −1 at a high rate of 5C, demonstrating outstanding cycling stability and superior rate capability. This study presented a rational design strategy based on dual-metal co-doping for developing high-sodium-content, structurally robust tunnel-type cathode materials, offering valuable insights for advancing the practical deployment of SIBs in grid-scale energy storage applications.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Huan Yan,Zhichao Liu,Qinlan Luo,Yangqiang Huang,Xiao Luo,Hao Chen
Because redox reactions involve electron transfer, modulating the electronic properties of catalysts can facilitate electron exchange between reactants and the catalyst surface, improving catalytic performance, especially for oxygen activation-based Fenton-like reaction. In this study, a series of boron nitride (BN) materials with varying nitrogen defect ratios were synthesized to modulate the electron distribution and transfer between the BN support and the Fe 2 O 3 anchored at defect sites. Combined characterizations of X-ray photoelectron spectroscopy (XPS), electron paramagnetic resonance (EPR), electrochemical impedance spectroscopy (EIS), and X-ray absorption fine structure spectroscopy (XAFS), we confirm that the interfacial electronic properties between Fe 2 O 3 and the support defects in Fe/BN-1 endow the Fe 2 O 3 with a relatively high local electron density. Specifically, the defect-rich BN-1 support donates electrons to the loaded Fe 2 O 3 , significantly enhancing the electron cloud density of the Fe active centers. Density functional theory (DFT) calculation further indicates that the Fe sites induced by N defects in h-BN are in an electron-rich state. This unique electronic structure facilitates electron transfer from the Fe sites to H 2 O 2 , thereby effectively promoting the subsequent activation of H 2 O 2 . As a result, Fe/BN-1 achieves an optimal Fenton-like catalytic activity for 96% tetracycline (TC) removal within 30 min, owing to its superior defect ratio and stronger interfacial interaction with Fe 2 O 3 . This work provides a foundation for the use of tunable defects in 2D materials to modulate the electronic properties of the metal supported on them for improved industrial redox reactions.
✓ 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）