INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2019
·
IF 4.784
Xiaoxiao Sun,Jiafeng Shen,Di Yu,Xiao-kun Ouyang
In this study, we prepared pH- and magnetism-responsive Fe 3 O 4 @C/carboxymethyl cellulose (CMC)/chitosan composite microbeads for controlled release of diclofenac sodium (DS) to (i) prevent complete drug release in gastric area, (ii) maintain blood drug concentration in a specific part of the body, (iii) reduce drug administration time and systemic drug toxicity , and (iv) improve drug efficacy. Through one-step solvent thermal treatment, a polyethylene glycol layer was wrapped into Fe 3 O 4 nanoparticles . Then, Fe 3 O 4 @C nanoparticles were incorporated into CMC matrix and coated with chitosan layer via a self-assembly technique to form core–shell polyelectrolyte complexes (PECs). The composite beads were characterized by SEM, TEM , FT-IR spectrometry , and TGA . In addition, the effect of different concentrations of Fe 3 O 4 @C, CMC, aluminum chloride (AlCl 3 ), and chitosan on the swelling process of composite beads, DS loading, and controlled release behavior was systematically studied. DS encapsulation efficiency in Fe 3 O 4 @C/CMC/chitosan beads reached 70.8 ± 0.65% at concentrations of 0.1% Fe 3 O 4 @C, 3% CMC, 3% AlCl 3, and 1% chitosan. The beads showed a higher swelling index in phosphate buffer at pH 7.4 and 6.8 than at pH 1.2. The composite beads revealed excellent pH-sensitive in vitro drug release profiles and prevented burst release in the gastrointestinal tract.
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Yaqin Yu,MengXue Wei,Junting Tong,Zhengdong Zhang,Xiaowei Song,Anni Liu,Rui Wang,Yu Zhang,Zhen Zhou
Arsenic (As) and antimony (Sb) are emerging pollutants with significant toxicity and carcinogenic potential. Their contamination in drinking water represents a health and safety risk. A novel Au-Fe 3 O 4 -C sensor was synthesized using an electrodeposition technique that leverages the superior electro-catalytic properties of gold (Au), the high adsorption capacity of Fe 3 O 4 , and the excellent conductivity of carbon fiber cloth. The Au-Fe 3 O 4 -C sensor enhanced the sensitivity of As and Sb stripping signals and reduced the limits of detection. Square wave voltammetry (SWV), used for As analysis, yielding LODs of 0.24 μg L −1 for As(III) and 1.20 μg L −1 for As(V). Differential pulse voltammetry (DPV), used for Sb analysis, yielding LODs of 0.50 μg L −1 for Sb(III) and 0.60 μg L −1 for Sb(V). We report quantitative detection of As and Sb in a mixed solution through DPV combined with the non-linear least squares based on Pearson function. The portable electrochemical workstation combined with Au-Fe 3 O 4 -C sensor was installed on a mobile inspection vehicle to detect As/Sb in groundwater (Shanxi, China) and rivers (Hunan, China). The indication error reached below12%, confirming the capability of electrochemistry based on Au-Fe 3 O 4 -C sensor for the field determination.
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2019
·Vol. 30
·期 9
·094002
·
IF 3.399
Desheng Li,Yu Zhang,Kun Rui,Huijuan Lin,Yan Yan,Xiaoshan Wang,Chao Zhang,Xiao Huang,Jixin Zhu,Wei Huang
Nanostructured manganese oxides have been regarded as promising anodes for lithium-ion batteries (LIBs) due to their high specific capacity, environmental friendliness and low cost. However, as conversion-type electrodes, their scalable utilization is hindered by intrinsically low reaction kinetics, large volume variation and high polarization. Herein, a coaxial-cable tubular heterostructure composed of a hollow carbon skeleton, Fe3O4 nanoparticles and ultrathin MnO2 nanosheets from inside out, donated as MnO2@Fe3O4@C, is synthesized via a facile two-step hydrothermal process. The unique design integrates conductive carbon and nanostructured MnO2 and Fe3O4 into a one-dimensional (1D) hierarchically open architecture, which provides abundant electrode–electrolyte contact areas, favorable heterointerfaces and ultrafast electron/ion pathways. Benefiting from these features, the MnO2@Fe3O4@C anode exhibits a high reversible capacity of 946 mAh g−1 at 200 mA g−1 after 160 cycles, and excellent cyclability with a specific capacity of 845 mAh g−1 at 500 mA g−1 after 600 cycles. This work might provide an insightful guideline for the design of novel electrode materials.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
ENERGY & FUELS
·
2023
·
IF 5.3
Liuyi Hu,Zhihang Lu,Fei Chen,Jun Zhang,Yang Xia,Wenkui Zhang,Yongping Gan,Xinping He,Wenlong Song,Hui Huang
Attributed to high theoretical capacity and abundant reserves, Si/C anodes have been commercialized in lithium-ion batteries (LIBs). However, the shortcomings of poor interfacial compatibility, low rate performance, and bad stability remain to be overcome. In this paper, a facile method for the synthesis of silicon/iron oxide/carbon (Si/Fe3O4/C) composites by ball-milling in a supercritical carbon dioxide (scCO2) fluid medium is proposed. This method utilizes the diffusion characteristics, extremely low viscosity, and excellent mass transfer properties of supercritical fluids. Under the infiltration of an scCO2 fluid, mesophase carbon microspheres (MCMB) are exfoliated into graphite flakes and achieve good interfacial fusion with silicon and Prussian blue during ball-milling. The Prussian blue is transformed into Fe3O4 by subsequent heat treatment under a nitrogen atmosphere, and Fe3O4 introduced in this way enhances the lithium-storage capacity, cycling stability, and rate performance significantly of Si/C anodes. As an anode for LIBs, the reversible capacity of Si/Fe3O4/C reaches 1363 mA h g–1 after 600 cycles at 1 A g–1. This study provides an idea for the design and fabrication of Si-based anode materials with high capacity and long cycle life.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
功能复合材料
·
固态化学
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Ying Xue,Xianyuan Liu,Xianyong Lu
Hierarchically three-dimensional (3D) materials present a pivotal challenge and opportunity in achieving effective microwave absorption with synergistic effects. In this work, α -Fe 2 O 3 @ZrO 2 with core-shell structure were fabricated in-situ on aramid nanofibers by a solvothermal method . Following calcination , 3D ZrO 2 /Fe 3 O 4 /C nanocomposites with Janus structure have been successfully synthesized. By controlling the lattice match and mismatch in both processes, a core-shell structure of α -Fe 2 O 3 @ZrO 2 and Janus structure of ZrO 2 /Fe 3 O 4 have been well-define performed. The composite material ZrO 2 /Fe 3 O 4 /C-700 has a minimum reflection loss (RL min ) of −67.4 dB at a thickness of 2.0 mm. The effective absorption bandwidth (EAB) at a thickness of 2.4 mm is 6.0 GHz (11.0–17.0 GHz). This study provides a novel strategy for fabricating high-efficiency electromagnetic wave absorption materials with dual synergistic effects in nanosized scale.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2019
·Vol. 30
·期 41
·415602
·
IF 3.399
Na Wang,Min Zhang,Libin Liu,Jing Zheng,Jingli Xu,Tasawar Hayat,Njud S. Alharbi
A unique nanostructure of Fe3O4 nanoparticles (NPs)-in/carbon layer/out-Ni NPs was developed and proved to be an efficient catalyst and protein adsorbent. This kind of nanostructure was formed through a space-confined pyrolysis procedure using polydopamine-Ni2+ coated Fe-NTA nanowires as the precursor. A N-doped carbon interlayer derived from polydopamine (PDA) supported a large amount of Ni NPs and entrapped well-defined Fe3O4 NPs, which were obtained through reduction of Ni2+, Fe3+ by carbonized NTA groups and a PDA layer. The contributions of the unique configuration along with the high density of Ni NPs in Fe3O4@C-Ni are significant for improving catalysis and protein adsorption performance, which is expected to be a promising alternative to other conventional catalysts and protein adsorbents. Due to the unique novel nanostructure, this nanocomposite possesses a wide range of applications, not only for catalytic reactions but also for other inhomogeneous reactions.
研究领域:
材料科学
·
催化化学
·
生物医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 89
·85917-85923
·
IF 3.289
Yaqin Chen,Li Zheng,Yuanyuan Fu,Rihui Zhou,Yonghai Song,Shouhui Chen
Fe3O4/carbon (C) nanocomposites with octahedral structure have been successfully prepared as anode materials for lithium-ion batteries (LIBs) by carbonizing hexagonal dipyramid Fe–metal organic frameworks (MOFs) under N2 directly. The prepared Fe–MOFs and Fe3O4/C octahedral nanostructures were carefully characterized by scanning electron microscopy, energy dispersive X-ray spectroscopy, X-ray powder diffraction, thermogravimetric analysis, N2 adsorption/desorption isotherms and electrochemical techniques. The results showed that octahedral Fe3O4 was encapsulated by carbon layers to form porous Fe3O4/C octahedral nanostructures. Benefiting from the high electrical conductivity of the carbon matrix and the porous structure of Fe3O4/C nanocomposites, the Fe3O4/C octahedral nanostructures demonstrated a lithium storage capacity of 861 mA h g−1 after 100 cycles at a specific current of 100 mA g−1, as anode for lithium ion batteries (LIBs), which is much higher than that of spindle-like Fe2O3 obtained via direct carbonization of Fe–MOFs under an air atmosphere (merely 603 mA h g−1 under identical conditions) and commercial Fe3O4. The elaborate and well-defined configuration also delivered a high rate capability and long cycling stability. Hence, the combination of Fe3O4 crystals with an octahedral nanostructure and the random doping of carbon could offer a valid method for the development of anode materials for high-performance LIBs.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Pei Dong,Xi Chen,Meiting Guo,Zhiyuan Wu,Haolong Wang,Feifei Lin,Jinqiang Zhang,Shuaijun Wang,Chaocheng Zhao,Hongqi Sun
Self-supporting electrodes have triggered great interests in improving electro-Fenton (EF) system for degradation of refractory organic pollutants . In this work, a novel self-supporting carbon fiber paper (CFP) electrode modified by transition metals, e.g. Fe and Mn, was fabricated and employed as a heterogeneous EF cathode. The prepared electrode exhibited excellent degradation for a number of typical organic pollutants along with superior stability. Remarkably, a high removal efficiency was achieved in the EF treatment of shale gas fracturing flowback wastewater. Results indicated that 65.2% TOC and 74.8% COD were eliminated after 4 h degradation. The residual COD value of the real wastewater was 80 mg L −1 , meeting the emission requirement of the integrated wastewater discharge standard (COD ＜ 100 mg L −1 ) with a low specific energy consumption of 6.9 kWh kg −1 COD −1 . This work demonstrates a competing alternative for efficient decontamination of real wastewater using an electro-Fenton strategy with a low-cost electrode.
研究领域:
环境科学
·
污水处理
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2017
·
IF 6.395
Qianhui Wu,Rongfang Zhao,Xiue Zhang,Wenlong Li,Renhua Xu,Guowang Diao,Ming Chen
Freestanding binder-free electrodes, as a new generation of electrode material, can effectively improve the energy density of lithium-ion batteries (LIBs). In this paper, novel structured Fe 3 O 4 /C composite nanofibers are successful synthesized by a simple electrospinning method followed by a thermal treatment process. The composite nanofibers have the unique internal voids between Fe 3 O 4 nanoparticles and carbon matrix. The Fe 3 O 4 /C nanofibers film with good flexibility and excellent electrical conductivity can be directly used to fabricate half-cell without any current collector, binder and additional conductive agent. As anode material for LIBs, the Fe 3 O 4 /C composite nanofibers deliver high reversible capacity (762 mA h g −1 at 0.5 A g −1 after 300 cycles). The results show that the internal voids in flexible Fe 3 O 4 /C composite nanofibers effectively buffer volume expansion of Fe 3 O 4 in lithium ion intercalation/deintercalation process and avoid the fracture of the nanofibers, which retain the structural integrity and improve the cycling stability of electrode. Therefore, the design and synthesis strategy of flexible nanofibers film are prospective for applications in next-generation flexible LIBs.
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 32
·e52746
·
IF 3.057
Chaoyu Wang,Zhi Hao,Zhu Luo,Le Yang,Qin Zhou,Jiaxing Guo
Efficient heat dissipation is very crucial for the performance, service life, and reliability of modern electronic devices. It is very challenging to improve heat dissipation efficiency through innovative material structure design. Therefore, in the work, dopamine (PDA) is used to coat the surface of graphite (C) with its excellent surface coating modification ability, so that the C surface has oxygen-containing groups to change its electronegativity, and Fe 2+ and Fe 3+ in the solution are attracted to the surface of C, and then in situ redox reaction occurs on the surface of C to generate magnetic graphite (Fe 3 O 4 @C). Fe 3 O 4 @C is uniformly dispersed into liquid silicone rubber (LSR) by solution blending, and Fe 3 O 4 @C performs integral directional filling in the LSR under the action of magnetic field ( B = 140 mT), thus preparing Fe 3 O 4 @C/LSR composites. Through magnetic field orientation, the thermal conductivity of Fe 3 O 4 @C/LSR composites reach 1.25 W/m·K when the content of Fe 3 O 4 @C is 100 phr, which is 410% higher than that of pure LSR (0.2447 W/m·K). Infrared thermal imaging test shows that Fe 3 O 4 @C/LSR composites has good heat dissipation performance, Fe 3 O 4 @C/LSR composites have shown great potential in terms of flexibility and high thermal conductivity.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2023
·
IF 6.1
Yao Zhao,Shu Zhang,Wang Yao,Yuxuan Zhu,Jing Qian,Juan Yang,Nianjun Yang
Hierarchically nanostructured binary transition metal oxide-based materials with high conductivity and catalytic activity are quite attractive for the electrochemical quantitative detection of environmental pollutants due to their natural abundance, variable oxidation state, and excellent synergies between metal sites. Herein, a new hierarchical MnO–Fe 3 O 4 @C/expanded graphite (EG) composite is designed and synthesized through a simple and in situ annealing method with the utilization of bimetallic organic framework (FeMn-MOF)/EG precursor. The synthesized MnO–Fe 3 O 4 @C/EG composite possesses a unique hierarchical nanoarchitecture that small-sized bimetallic oxide nanoparticles of 10–40 nm completely encapsulated by amorphous carbon layers of 2–4 nm are uniformly distributed on the EG platform. This distinctive structure combines the advantages of high conductivity, excellent catalytic activity, and strong stability. Resultantly, when it is applied to monitor environmental endocrine disruptors , the sensor exhibits a significant catalytic effect on the electrochemical oxidation of bisphenol A (BPA), inducing an amplified response current. In addition, the sensor shows a wide linear range of 1–50 μM and 50–400 μM for the BPA monitor, giving a sensitivity of 5208.8 and 1641.9 μA mM −1 cm −2 , respectively. This study offers a new approach to design hierarchical binary metal oxide-based sensing materials as well as to explore their electrochemical properties and applications for the determination of emerging contaminants.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MONATSHEFTE FUR CHEMIE
·
2014
·Vol. 146
·期 3
·441-447
·
IF 1.347
Li Longfei,Chen Lin,Liu Weifeng,Yang Yongzhen,Liu Xuguang,Chen Yongkang
5-Fluorouracil surface-imprinted thermosensitive magnetic microspheres were prepared by using Fe 3 O 4 -encapsulating carbon microspheres as cores, N -isopropylacrylamide as thermosentitive monomer, ammonium persulfate as initiator, N , N ′-methylenebisacrylamide as crosslinker, and 5-fluorouracil as template molecule. The formation of these hybrid microspheres was verified by field emission scanning electron microscopy, transmission electron microscopy, Fourier transformation infrared spectroscopy, thermogravimetry, and dynamic light scattering. The results of the latter measurements show that the as-synthesized microspheres have a hydrodynamic diameter of 326 nm with the lower critical solution temperature of around 43 °C. The obtained microspheres are magnetic and show good potential for controlled loading and release of 5-fluorouracil. Graphical abstract
研究领域:
药剂学
·
纳米医学
·
肿瘤治疗
·
高分子材料科学
·
靶向给药系统
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）