CARBON
·
2021
·
IF 9.594
Zhouyu Tong,Zijian Liao,Yanyan Liu,Mingliang Ma,Yuxin Bi,Weibo Huang,Yong Ma,Mingtao Qiao,Guanglei Wu
Designing one-dimensional (1D) magnetic-carbon composites microwave absorbers is a promising strategy that can meet the current demand for high-performance microwave absorption (MA) materials. In this work, hierarchical structured Fe 3 O 4 /Fe@C@MoS 2 nanofibers were successfully obtained via a simple three-step method. 1D Fe 3 O 4 /Fe@C nanofibers were fabricated through electrospinning technology and in-situ polymerization followed by carbonization and reduction in H 2 /N 2 atmosphere. MoS 2 nanosheets grew irregularly on the surface of 1D Fe 3 O 4 /Fe@C nanofibers to form the flower-like structure. The morphology, composition and magnetism of samples were systematically investigated. Furthermore, electromagnetic characteristics and MA properties of Fe 3 O 4 /Fe@C nanofibers and Fe 3 O 4 /Fe@C@MoS 2 nanofibers were compared. The minimum reflection loss (RL min ) of Fe 3 O 4 /Fe@C@MoS 2 nanofibers could reach −53.79 dB at 11.12 GHz and the corresponding absorption bandwidth (RL < -10 dB) of 4.4 GHz was achieved at the absorber thickness of 2.24 mm. This work combines electrospinning technology with traditional chemical synthesis to prepare a novel 1D core-shell microwave absorber, which provides some inspiration for preparing MA material in the future.
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高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2022
·
IF 5.876
Xiuying Zhu,Mengjie Li,Xiong-Fei Zhang,Jianfeng Yao
Iron-based metal-organic framework (MIL-100) with intrinsic high surface area and low cost is extremely attractive in the field of organic pollutant remediation. Herein, delignified balsa wood is utilized as substrate/support for the in situ growth and dispersion of MIL-100 particles. Results demonstrate that the MIL-100 particles adhere tightly to the support and a hierarchal architecture is constructed. The MIL-100@Wood composite can be used as adsorbent and filter for the alleviation of organic contamination. With 25.4 wt% of MIL-100 loading, the MIL-100 decorated delignified wood (MD-Wood) exhibits a tetracycline (TC) adsorption capacity of 109.9 mg/g. The composite MD-Wood can be easily fabricated into an all-in-one filter and this filter presents an effective treatable volume of 1100 mL of TC solution (20 mg/L). The MD-Wood is further deposited with Ag particles and the Ag@MD-Wood can be directly applied for the flow catalytic reduction of 4-nitrophenol. Moreover, the composite woods are facile to regenerate and possess superior reusability and stability.
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高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2022
·
IF 3.656
Lijun Guo,Feifei Li,Jianxin Liu,Rui Li,Zhuobin Yu,Qing Xi,Lulu Zhang,Yaru Li,Caimei Fan
Morphology regulation is a simple way to improve photocatalytic activity. In this work, a MIL-101(Fe) photocatalyst with cracked spindle morphology has been successfully prepared by EG pre-coordination solvothermal method . The cracking degree of MIL-101(Fe) can be regulated by adjusting pre-coordination time. The MIL-101(Fe) with the optimal uniform crack displays a best NH 3 evolution rate of 592 μmol h −1 g −1 under the visible light irradiation . Cracked MIL-101(Fe) is similar to a semi-exposed model, which can increase the number of reactive sites, improve refraction and reflection of light, and ultimately enhance the photocatalytic nitrogen fixation activity. This work developed a convenient strategy to improve the photocatalytic activity of nitrogen reduction by controlling morphology.
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高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 43
·23103-23112
·
IF 14.511
Xuqi Lin,Jingguo Gao,Kehua Zhong,Yongcong Huang,Hurong Yao,Yingbin Lin,Yongping Zheng,Zhigao Huang,Jiaxin Li
For high-performance silicon–carbon (Si–C)-based anode materials used in high-energy-density lithium-ion batteries (LIBs), there is an urgent need to rationally construct a stable solid electrolyte interface (SEI) film and load a high proportion of silicon content, which is closely related to the capacity and cycling stability of the electrode. Herein, composites of Fe/Fe3C-modified carbon nanofiber–coated Si nanoparticles (Fe/Fe3C–Si@CNFs) were synthesized via a simple electrospinning method. These composites effectively overcome the volume change effect, poor interfacial compatibility and low conductivity, delivering excellent LIB performance. Tested at 2.0 A g−1, Fe/Fe3C–Si@CNFs provides a high reversible capacity of 956.5 mA h g−1 with a coulombic efficiency of more than 99.5% even after 4000 ultra-long stable cycles. The high conductivity of the Fe/Fe3C embedded in the CNF framework can promote e− transfer and boost the Li+ diffusion kinetics in the electrode. The catalytic activity of Fe/Fe3C helps to enhance the interfacial compatibility, grow a balanced stable SEI film and promote the long-cycle stability of the electrode at room temperature.
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高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2025
·Vol. 39
·期 5
·e70143
·
IF 0
Lu Hong,Qiaoyu Chen,Lei Rao,Zhen Wang,Bing Wang,Qing He,Wenxin Lin
Generally, single cancer treatment is insufficient to achieve ideal therapeutic effect. Multimodal therapy has the potential to overcome efficacy challenges and reveals great promise in enhancing therapeutic effect. Herein, a combination treatment system (DOX@Fe-PBC) based on chemotherapy, chemodynamic therapy (CDT), and ferroptosis was constructed by loading anticancer drug doxorubicin hydrochloride (DOX) into Fe-based metal–organic framework (Fe-PBC). In simulated tumor microenvironment, the system released anticancer drug DOX to be a DNA intercalator and topoisomerase II inhibitor to realize chemotherapy (CT) and iron ions were delivered to induce Fenton reaction, which boost the generation of •OH, resulting in the enhancement of the effect of chemodynamic therapy (CDT). Meantime, the system could consume glutathione (GSH) to reduce the expression of glutathione peroxidase 4 (GPX4); then, lipid peroxides (LPO) were accumulated to realize ferroptosis. DOX@Fe-PBC provided an effective strategy of chemotherapy, CDT, and ferroptosis to realize ideal cancer treatment.
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产品关联
DOI
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Ya-Nan Jing,Xing-Liang Yin,Lei-Lei Li,Yan-Lan Wang,Jia Xue,Ze-Feng Xu,Da-Qiang Liu,Chuan-Wu Chen,Xiao-Jie Liu,Er-Kang Liu
CO 2 -to-high value-added chemicals via a photocatalytic route is of interest but strangled by the low efficiency. Herein, a novel Fe-TiO 2-x /TiO 2 S-scheme homojunction was designed and constructed by using a facile surface modification approach whereby oxygen vacancy (OV) and Fe introducing on the TiO 2 nanorod surface. The as-synthesized Fe-TiO 2-x /TiO 2 S-scheme homojunction exhibits positive properties on promoting photocatalytic CO 2 reduction: i) the nanorod structure provides numerous active sites and a radical charge transfer path; ii) the doped Fe and OV not only synergistically enhance light utilization but also promote CO 2 adsorption; iii) the Fe-TiO 2-x /TiO 2 S-scheme homojunction benefits photoexcited charge separation and retains stronger redox capacity. Thanks to those good characters, the Fe-TiO 2-x /TiO 2 homojunction exhibits superior CO 2 reduction performances with optimized CO/CH 4 generation rates of 122/22 μmol g -1 h −1 which exceed those of pure TiO 2 by more than 9.4/7.3 folds and most currently reported catalytic systems. This manuscript develops a facile and universal approach to synthesize well-defined homojunction and may inspire the construction of other more high-efficiency photocatalysts toward CO 2 reduction and beyond.
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PubMed
高影响因子
KEY ENGINEERING MATERIALS
·
2020
·
IF 0
Rui Hua Wang,Ai Xia Chen,Chao Yang,Fang Wang,Ming Han Xu,Shi Bin Li,Jie Guang Song,Lin Chen
In this paper, the effect of sintering temperature on the interfacial structure of the composite was investigated and three different formulation groups were used to compare the respective properties. To obtain a composite material with excellent interface, the law between reference number and performance is obtained. Through mixing, molding, sintering, sample preparation, scanning electron microscopic observation, energy spectrometer observation and analysis, the following conclusions can be drawn: As the temperature increases, the density and hardness increase. The sample melts at 1500 °C, and there is no specific data. When the temperature reaches 1450 °C, the density and hardness reach the highest. When the formulation is Fe:Al2O3:SiO2=18:1:1 and the temperature reaches 1450 °C, the properties of the sample materials are optimized. The density is as high as 95% and the hardness reaches 42.9HBW.
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DOI
Materials
·
2021
·Vol. 14
·期 8
·1908
·
IF 3.623
Yuting Du,Yan Mo,Yong Chen
Activated carbon is widely used as an electrode material in supercapacitors due to its superior electrochemical stability, excellent electrical conductivity, and environmental friendliness. In this study, the self-discharge mechanisms of activated carbon electrodes loaded with different contents of Fe impurities (Fe and Fe3O4) were analyzed by multi-stage fitting to explore the tunability of self-discharge. It is was found that a small quantity of Fe impurities on carbon materials improves the self-discharge performance dominated by redox reaction, by adjusting the surface state and pore structure of carbon materials. As the content of Fe impurities increases, the voltage loss of activated carbon with the Fe impurity concentrations of 1.12 wt.% (AF-1.12) decreases by 37.9% of the original, which is attributable to the reduce of ohmic leakage and diffusion, and the increase in Faradic redox at the electrode/electrolyte interface. In summary, self-discharge performance of carbon-based supercapacitors can be adjusted via the surface state and pour structure, which provides insights for the future design of energy storage.Keywords:supercapacitors;self-discharge;carbon;redox reactions
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PubMed
高影响因子
ACS Chemical Neuroscience
·
2019
·
IF 3.861
Lu Kou,Yuemei Duan,Pengcheng Wang,Yaru Fu,Nerek Darabedian,Yonghui He,Dianlu Jiang,Dinglong Chen,Juan Xiang,Guokun Liu,Feimeng Zhou
The aberrant autoxidation of norepinephrine (NE) in the presence of oxygen, which is accelerated by Fe(III), has been linked to the pathogenesis of the Parkinson’s disease (PD). Adenosine triphosphate (ATP), as a neurotransmitter whose release can be stimulated by tissue damage and oxidative stress, is co-stored and often co-released with NE in presynaptic terminals. We have shown previously that ATP inhibits the iron-catalyzed dopamine oxidation, thereby decreasing the production of certain neurotoxins such as 6-hydroxydopamine. Whether ATP plays a similar role in Fe(III)-catalyzed NE oxidation and how it maintains the NE stability have not been investigated. Here, we studied the coordination in a ternary complex among NE, Fe(III), and ATP, and found that Fe(III) is coordinated as a octahedral center by NE and ATP. Voltammetry and mass spectrometry were employed to examine this ternary complex’s modulation of the NE autoxidation. NE–Fe(III)–ATP plays a protective role to modulate the autoxidation and Fe(III)-catalyzed oxidation of NE. The ternary complex can be detected in the substantia nigra (SN), locus coeruleus (LC), and striatum regions of C57BL/6 wild-type mice. In contrast, the 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-induced PD mouse brains displayed a significant decrease of the ternary complex in the SN region and an increase in the LC and striatum areas. We posit that the ternary complex is produced by noradrenergic neurons as a protective regulator against neuronal damage and oxidative stress, contributing to the lower vulnerability of LC neurons with respect to that of SN neurons.
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PubMed
高影响因子
ENVIRONMENTAL POLLUTION
·
2019
·
IF 5.714
Zhao Yang,Xu Zhang,Siji Pu,Renxiang Ni,Ying Lin,Yong Liu
A novel heterogeneous Fenton-like system (Mg/Fe-O 2 ) which could directly convert oxygen (O 2 ) to hydrogen peroxide/hydroxyl radicals (H 2 O 2 / • OH) was developed and used to degrade 4-chlorophenol. The Mg/Fe bimetallic particles were prepared by chemical displacement process and characterized by XRD, SEM and TEM. The in situ continuous production of H 2 O 2 / • OH and the effect of the mole ratio of Mg to Fe in the Mg/Fe bimetallic particles and the operating parameters on the degradation 4-chlorophenol in Mg/Fe-O 2 system were investigated in detail. It was found that the Mg/Fe bimetallic particles with the mole ratio of Mg to Fe of 32:1 had the best performance for the 4-chlorophenol degradation and the maximum cumulative concentration of H 2 O 2 , the degradation efficiency of 4-chlorophenol and the removal efficiency of TOC in Mg/Fe-O 2 system were 34.5 mg/L, 100% and 91.8%, respectively, at pH 3, O 2 flow rate 400 mL/min, dosage of Mg/Fe bimetallic particles 2 g/L, 4-chlorophenol initial concentration 50 mg/L and reaction time 60 min. It was revealed by radical scavenging experiments that • OH, particularly the surface-bound • OH, were the predominant reactive oxygen species in Mg/Fe-O 2 system for the degradation of 4-chlorophenol. The main intermediates of 4-chlorophenol degradation were detected by high-resolution liquid chromatography equipped with time-of-flight mass spectrometry (HRLC–ToF-MS) and ion chromatography (IC). Based the results of control experiments and the electrochemical tests, the possible pathway and mechanism of 4-chlorophenol degradation in Mg/Fe-O 2 system were tentatively proposed.
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DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2021
·
IF 4.098
Xiao-Lan Zhao,Jia-Li Liu,Fa-Ting Xie,Tong Yang,Rong Hu,Yun-Hui Yang
In this paper, a simple, rapid, and low-cost colorimetric method was designed based on Co/Fe-MOFs-iodide composite for the quantitative detection of H 2 S. It is know that iodide can improve the catalytic activity of bimetallic porous material Co/Fe-MOFs via adsorption into the framework of MOFs. Herein, we demonstrate a novel strategy to enhance the peroxidase-like activity of MOFs. Compared to horseradish peroxidase (HRP), the kinetic measurement results show that Co/Fe-MOFs-iodide exhibits excellent affinity to substrates, promoting electron transfer. Due to the synergetic effect of Co/Fe-MOFs and iodide, and rapid electron transfer process, Co/Fe-MOFs-iodide demonstrates improved peroxidase-like activity. As a proof-of-concept application, a novel, highly sensitive H 2 S colorimetric method is established with a detection limit (LOD) of 0.33 nM. In the absence of iodide, LOD is approx. 200-fold higher than that of the amplified colorimetric assay. The proposed method can also accurately detect traces of H 2 S in serum samples.
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PubMed
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 42
·23817-23827
·
IF 12.732
Manman Feng,Xuemei Wu,Huiyuan Cheng,Zihao Fan,Xiangcun Li,Fujun Cui,Shuai Fan,Yan Dai,Guangping Lei,Gaohong He
The diatomic catalysts (DACs) provide a new strategy for efficient catalysis of CO2 reduction reaction (CO2RR) owing to their maximum atomic utility and more flexible active sites. However, it is still challenging to precisely design heteronuclear diatomic active centers and understand the coordination mechanism of binary sites at the atomic level. Herein, a nitrogen-doped carbon matrix with precisely controlled Fe–Cu diatom sites is synthesized through a metal–organic framework. The as-obtained Fe/Cu–N–C catalyst exhibits an excellent CO faradaic efficiency (>95% over a wide potential range of −0.4 to −1.1 V vs. RHE, 99.2% at −0.8 V vs. RHE), a high turnover frequency (5047 h−1 at −1.1 V vs. RHE), and a low overpotential (50 mV), thus outperforming most reported atomically dispersed catalysts. Further density functional theory calculations indicate that the synergy between Fe–Cu diatoms causes rapid charge transfer and effectively adjusts the position of the d-band center, which reduces the energy barriers for *COOH formation and *CO desorption. This work provides a new approach for advancing universal synthesis strategies to construct heteronuclear diatomic catalysts and explore synergistic effects.
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高影响因子
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