COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2017
·
IF 4.075
Yiwei Zheng,Xiaoxia Wang,Shuang Wei,Baoqin Zhang,Mingxun Yu,Wei Zhao,Jingquan Liu
Graphene is a promising lightweight microwave absorption (MA) absorber, but the limited dielectric loss and nonmagnetic characteristic have impeded its further applications. Through the structure modification, porous (1–2.5 μm) graphene was successfully prepared via a simple pyrolysis process, and the minimum reflection loss (RL) value reached −48 dB at 9.8 GHz, which demonstrated that porous graphene (PG) showed outstanding MA performance than the ordinary graphene (OG). In order to strengthen the magnetic loss, and then boost the impedance matching, Fe 3 O 4 nanoparticles (∼10 nm) were deposited uniformly on the surface of PG via in situ precipitation to synthesize porous graphene-Fe 3 O 4 (PG-Fe 3 O 4 ) composites. It was found that the as-prepared PG-Fe 3 O 4 composites showed especially high MA performance, and the minimum RL of −53.0 dB was achieved at 5.4 GHz with the thickness of 6.1 mm. The absorption bandwidth of RL less than −10 dB was from 12.6 to 18.0 GHz (5.4 GHz) with a thin thickness of 2.7 mm. The excellent MA properties of PG-Fe 3 O 4 composites were the consequence of the perfect impedance matching, porous structure as well as the multi-polarization. These results demonstrated that the PG-Fe 3 O 4 composites with excellent MA properties and lightweight should be promising absorbers for practical applications.
研究领域:
材料科学
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电磁学
✓ 已验证
产品关联
DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
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2017
·Vol. 44
·期 1
·1-11
·
IF 1.369
Yan Xuefeng,Gan Kaifeng,Tian Baozhu,Zhang Jinlong,Wang Lingzhi,Lu Deli
A yolk–shell-structured sphere composed of a superparamagnetic Fe 3 O 4 core and a carbon shell (Fe 3 O 4 @HCS) was etched from Fe 3 O 4 @SiO 2 @carbon by NaOH, which was synthesized through the layer-by-layer coating of Fe 3 O 4 . This yolk–shell composite has a shell thickness of ca. 27 nm and a high specific surface area of 213.2 m 2 g −1 . Its performance for the magnetic removal of tetracycline hydrochloride from water was systematically examined. A high equilibrium adsorption capacity of ca. 49.0 mg g −1 was determined. Moreover, the adsorbent can be regenerated within 10 min through a photo-Fenton reaction. A stable adsorption capacity of 44.3 mg g −1 with a fluctuation <10% is preserved after 5 consecutive adsorption–degradation cycles, demonstrating its promising application potential in the decontamination of sewage water polluted by antibiotics.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
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IF 5.316
Xiang Luo,Haifeng Li,Dongdong Deng,Lu Zheng,Yubo Wu,Wenjun Luo,Meijie Zhang,Rongzhou Gong
Fe 3 O 4 , as a typical absorber, its electromagnetic wave (EMW) absorption properties are far from meeting the requirements of practical application due to its poor impedance matching. In this study, three kinds of novel heterogeneous structured composites, dendritic Fe 3 O 4 @(HCl doped PANI), Fe 3 O 4 @(p-TSA doped PANI) and Fe 3 O 4 @(dedoped PANI), were prepared via hydrothermal method combined with thermal reduction and in-situ polymerization, and their phase composition, microscopic morphologies, static magnetic properties , EMW absorption performance and absorption mechanisms were investigated. The results showed that the introduction of different medium doped and dedoped PANI greatly enhanced the EMW absorption performance of Fe 3 O 4 . The outstanding advantages of Fe 3 O 4 @(HCl doped PANI) were that the widest effective absorption bandwidth ( EAB ) up to 6.08 GHz in a relatively thin thickness of 2.1 mm. And the Fe 3 O 4 @(dedoped PANI) composite achieved strong absorption ability (− 53.08 dB@3.04 GHz) at low frequency in a relatively thin thickness (4.9 mm). The remarkable improvement of EMW absorption performance of dendritic Fe 3 O 4 @PANI composites could be attributed to the introduction of dissipation mechanisms, the optimization of impedance matching characteristics and the formation of appropriate conductive network microstructure. The dendritic Fe 3 O 4 @PANI composites are promising EMW absorption materials and have great practical application value.
研究领域:
材料科学
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电磁学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
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2013
·
IF 4.814
Xiaoyu Sun,Ke Ding,Yi Hou,Zhenyu Gao,Wensheng Yang,Lihong Jing,Mingyuan Gao
Monodispersed superparticles (SPs) consisting of hydrophobic CuInS2@ZnS quantum dots (QDs) were prepared through a self-assembling process induced by introducing ethanol into the cyclohexane solution of the QDs stabilized by 1-dodecanethiol. The solvent polarity-dependent size and size distribution of the resultant SPs were carefully characterized by using scanning electron microscopy, transmission electron microscopy, and dynamic light scattering. The formation and the growth mechanism of the SPs were investigated. By manipulating the nucleation and the growth kinetics through the addition rate of ethanol, the size was effectively tuned without broadening the size distribution of the SPs. By overcoating the SPs with amphibious Fe3O4 nanocrystals (NCs) stabilized by poly(4-vinylpyrollidone), aqueous dispersible SPs were obtained. Inheriting the fluorescent and magnetic properties from the corresponding mother particles, the resultant SPs presented excellent fluorescent and magnetic properties and, thus, may potentially be useful for bioseparation, detection, etc.
研究领域:
材料科学
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2021
·Vol. 11
·期 9
·2203
·
IF 5.076
Hong Wang,Yuejin Ma,Wenming Zhang
Nanoscale Fe3O4-Sn@CNFs was prepared by loading Fe3O4and Sn nanoparticles onto CNFs synthesized via electrostatic spinning and subsequent thermal treatment by solvothermal reaction, and were used as anode materials for lithium-ion batteries. The prepared anode delivers an excellent reversible specific capacity of 1120 mAh·g−1at a current density of 100 mA·g−1at the 50th cycle. The recovery rate of the specific capacity (99%) proves the better cycle stability. Fe3O4nanoparticles are uniformly dispersed on the surface of nanofibers with high density, effectively increasing the electrochemical reaction sites, and improving the electrochemical performance of the active material. The rate and cycling performance of the fabricated electrodes were significantly improved because of Sn and Fe3O4loading on CNFs with high electrical conductivity and elasticity.Keywords:Fe3O4;Sn;carbon nanofibers;lithium-ion batteries;anode material
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yuhong Cui,Baoluo He,Shenghua Xue,Zhuo Chen,Shujuan Liu,Qian Ye,Feng Zhou,Weimin Liu
Improving the tribological performance of water via designing nanomaterials as lubricant additive has garnered mounting interest. In this work, the poly-(N-isopropylacrylamide) microgel is grafted onto Fe 3 O 4 nanoparticles surface (Fe 3 O 4 @PNA) via free radical polymerization. Then, the Fe 3 O 4 @PNA can self-anchored on the MXene nanosheets via hydrogen bonding interaction to obtain MXene@Fe 3 O 4 @PNA composite. The as-prepared MXene@Fe 3 O 4 @PNA can effectively reduce friction and wear when used as a water-based lubricant additive. Compared with pure water, the average coefficient of friction (COF) and wear volume decrease by 61% and 78.7%, respectively. The lubrication mechanism was analyzed by focused ion beam technique-TEM (FIB-TEM) and X-ray photoelectron spectroscopy (XPS). The outstanding tribological performance of MXene@Fe 3 O 4 @PNA is attributed to the synergistic lubrication effect of MXene and Fe 3 O 4 @PNA. Interlayer shear of MXene and spherical Fe 3 O 4 @PNA can make MXene@Fe 3 O 4 @PNA play a full role of sliding friction and rolling friction mechanism, which can induce tribo-chemical reactions to form a protective film on the contact area of the friction pair. In addition, the hydrophilic groups of the MXene@Fe 3 O 4 @PNA can adsorb a large number of water molecules and form a hydration layer, reducing the agglomeration of nanosheets and acting as a boundary lubrication film. Moreover, the as-prepared MXene@Fe 3 O 4 @PNA exhibit excellent photothermal conversion performance in both underwater environment and dry state. Based on this characteristic, infrared light can be collected efficiently and stored quickly. Then, convert and utilize it. Therefore, the multifunctional MXene@Fe 3 O 4 @PNA has a broad application prospect as a water-based intelligent lubrication additive.
研究领域:
材料科学
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纳米技术
·
摩擦学
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
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2019
·
IF 5.108
Hai Chen,Jianlong Wang
In this study, Fe 3 O 4 /Co 3 O 4 composites were prepared and applied in the catalytic ozonation of sulfamethoxazole (SMX). Various parameters including initial solution pH, Fe 3 O 4 /Co 3 O 4 composites dose, O 3 dose and SMX concentration were investigated. Results showed that Fe 3 O 4 /Co 3 O 4 composites could significantly improve the mineralization of SMX by catalytic ozonation system and a synergic effect between Fe 3 O 4 and Co 3 O 4 was observed. Only about 16% total organic carbon (TOC) could be removed in 60 min by single ozonation under the condition of 20 mg/L SMX, 6.0 mg/min O 3 , pH 5.1 and room temperature, While in the presence of 0.10 g/L Fe 3 O 4 /Co 3 O 4 composites at the same conditions, 60% TOC removal were obtained by catalytic ozonation process. SMX could be degradation by O 3 rapidly and the removal was not significantly affected by the changing parameters. However, those operating parameters exerted different effects on SMX mineralization. Furthermore, the generation of hydroxyl radicals ( OH) and the utilization efficiency of O 3 would increase with the addition of Fe 3 O 4 /Co 3 O 4 composites. The quenching experiments indicated that OH might account for the enhancement of SMX mineralization and the mechanism of catalytic ozonation was proposed. Additionally, the intermediates were detected by using a high-performance liquid chromatography-mass spectrometry (LC-MS), from which some plausible transformation pathways were proposed.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
Green Energy & Environment
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2020
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IF 6.395
Qingmiao Wang,Yi Qin,Feifei Jia,Shaoxian Song,Yanmei Li
Volumetric solar evaporations by using light-absorbing nanoparticles suspended in liquids (nanofluids) as solar absorbers have been widely regarded as one of the promising solutions for clean water production because of its high efficiency and low capital cost compared to traditional solar distillation systems. Nevertheless, previous solar evaporation systems usually required highly concentrated solar irradiation and high capital cost, limiting the practical application on a large scale. Herein, for the first time in this work, polydopamine (PDA)-capped nano Fe 3 O 4 (Fe 3 O 4 @PDA) nanofluids were used as solar absorbers in a volumetric system for solar evaporation. The introduction of organic PDA to nano Fe 3 O 4 highly contributed to the high light-absorbing capacity of over 85% in wide ranges of 200–2400 nm because of the existence of numerous carbon bonds and pi (π) bonds in PDA. As a result, high evaporation efficiency of 69.93% under low irradiation of 1.0 kW m −2 was achieved. Compared to other nanofluids, Fe 3 O 4 @PDA nanofluids also provided an advantage in high unit evaporation rates. Moreover, Fe 3 O 4 @PDA nanofluids showed excellent reusability and recyclability owing to the preassembled nano Fe 3 O 4 , which significantly reduced the material consumptions. These results demonstrated that the Fe 3 O 4 @PDA nanofluids held great promising application in highly efficient solar evaporation.
研究领域:
材料科学
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环境科学
·
能源科学
✓ 已验证
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2024
·
IF 4.3
Jie Jin,Shanshan Wu,Xue Fang,Haoran Li,Jing Wang,Shouhu Xuan,Weili Kong,Di Wang,Xia Chen,Ken Cham-Fai Leung,Qunling Fang,Tianzhi Luo
Pathogenic infections pose a major threat to global public health, and what's worse is that the bacteria in infected places often exist in the form of biofilms, making it impossible for antibiotics and other contact bactericidal substances to penetrate their interior. Therefore, looking for an effective method with synergistic antibacterial and biofilm removal properties is a key challenge. A kind of magnetic MXene@Fe 3 O 4 /PDA nanosheets with antibacterial properties of photothermal magnetic coupling are reported in this paper. Fe 3 O 4 was grown in situ on MXene nanosheets and then coated with a layer of polydopamine (PDA). MXene@Fe 3 O 4 /PDA nanosheet (120 μg/mL) showed an over 95% inhibition rate against E. coli and S. aureus under 808 nm laser irradiation. In addition, peroxidase-like activity can produce reactive oxygen species. The photothermal antibacterial properties were further enhanced under the action of rotating magnetic field. The antibacterial activity was increased to close to 99.99%, and the removal effect of biofilm was also very good. The photothermal and magnetic coupled antibacterial effects can reduce the amount of MXene@Fe 3 O 4 /PDA, thus it is expected to reduce the damage caused by overheating normal tissues and is safer than pure photothermal therapy.
研究领域:
材料科学
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纳米技术
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生物医学工程
·
抗菌技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Nanomaterials
·
2019
·
IF 2.233
Bing Liu,Jian Zhou,Bin Zhang,Jing Qu
Photothermal therapy is a promising approach for cancer treatment. In our study, we investigate the photothermal effect of different concentrations of the Ag@Fe3O4 nanoparticles on apoptosis and proliferation in the human epithelial ovarian cancer cells SKOV3. Ovarian cancer cells SKOV3 were treated with the Ag@Fe3O4 nanoparticles under an 808 nm near-infrared (NIR) laser irradiation at different concentrations. The cell proliferation was measured by the cell counting kit-8 (CCK-8) assay. The results show that the Ag@Fe3O4 nanoparticles with NIR laser irradiation could markedly inhibit the proliferation of the ovarian cancer cells SKOV3 independent of a concentration-time manner. Meanwhile, the cell morphology was also seriously damaged under the treatment of high-concentration nanoparticles. However, Ag@Fe3O4 nanoparticles have almost no obvious effect on the growth of SKOV3 cells without NIR laser illumination treatment. Therefore, it is reasonable to believe that the Ag@Fe3O4 nanoparticles have promising applications in photothermal treatment of cancer cells.
研究领域:
生物医学
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肿瘤学
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纳米医学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Qiancheng Zhang,Zuojuan Du,Xiaozhong Huang,Zixiang Zhao,Tong Guo,Guanjie Zeng,Yantao Yu
Adjustable and high-performance microwave absorbing materials of three-dimensional (3D) reduced graphene oxide (RGO)@Fe 3 O 4 structure were realized with different compositions. 100 × 50 nm Fe 3 O 4 nanorods were anchored on both sides of RGO sheets uniformly which stop RGO sheets from re-stacking. Effective absorption bands shifted to higher frequencies and thinner thicknesses in 2–18 GHz due to the precisely controlled complex permittivity caused by the decreased content of RGO. The maximum reflection loss of RGO@Fe 3 O 4 composites was up to −56.25 dB at 12.62 GHz with a small thickness of 2.0 mm, and the absorption bandwidth below −10 dB was 5.40 GHz with only 20 wt% filler loading in the paraffin matrix. The dielectric loss was a primary factor in the superior absorption performance resulting from dipolar polarization, interfacial polarization and associated relaxation phenomena. Hence, the appropriate composition of the RGO@Fe 3 O 4 structure can consider both the microwave absorptivity and the absorption adjustability. This method can be apply to other graphene-based magnetic microwave absorption materials.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 115
·113933-113939
·
IF 3.289
Hongmei Liu,Yandong Xie,Yafei Zhang,Yifan Cai,Baiyang Li,Honglin Mao,Rutong Yu
Fe3O4 nanoparticles (NPs) have attracted a great deal of attention due to their magnetic properties, low toxicity, high surface area and their small sizes. Owning to the low toxicity, easy separation and controlled NPs size, in this study Fe3O4 NPs have been used for co-delivery two anticancer drugs for combination tumor therapy. We used doxorubicin (DOX) prodrugs and DSPE-PEG5000 to coat Fe3O4 NPs to form DOX–Fe3O4 NPs. The hydrophobic anticancer drug combretastatin A-4 (CA4) was loaded into DOX–Fe3O4 NPs to form DOX–CA4–Fe3O4 NPs. It was proved that the obtained DOX–CA4–Fe3O4 NPs with an average diameter around 53.7 ± 5.25 nm could accumulate effectively in tumors by an enhanced permeability and retention (EPR) effect. After intravenous injection, the DOX–CA4–Fe3O4 NPs were found to selectively accumulate at the tumor site and killed the cancer cells in a combinatorial way. The results indicate that the DOX–CA4–Fe3O4 NPs can be potentially applied as a safe and efficient two anticancer drugs delivery carrier.
研究领域:
药学
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纳米医学
·
肿瘤学
✓ 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）