Extreme Mechanics Letters
·
2018
·
IF 0
Xin Wang,Bin Han,Run-Pei Yu,Fei-Chen Li,Zhen-Yu Zhao,Qian-Cheng Zhang,Tian Jian Lu
Fe 3 O 4 nanoparticle-infiltrated chromatography paper is prepared using a low-cost blending method. Upon characterizing the basic material properties of the Fe 3 O 4 /paper nanocomposite , beam-, accordion- and star-shaped actuators are constructed using the nanocomposite and the corresponding actuation performance is investigated experimentally. The beam-shaped actuator exhibits a reversible flexural deformation due to low magnetic hysteresis loop of the Fe 3 O 4 /paper nanocomposite, maintaining a stable response after 100 cycles. The accordion-shaped actuator can reach a maximum strain of 100% while the star-shaped actuator can capture a spitball twice heavier than itself.
研究领域:
材料科学
·
智能材料
·
纳米技术
✓ 已验证
产品关联
DOI
FUEL
·
2020
·
IF 5.578
Ping He,Xinyi Zhao,Fei Luo,Yi Zhang,Jie Wei,Tianhong Xu,Jiang Wu,Naichao Chen
At the front end of the Electrostatic precipitator (ESP), activated carbon injection is a common method to remove mercury from flue gas, but the high cost, low efficiency and non-recyclability limit the practical application of activated carbon. MoS 2 , a transition metal sulfide with a two-dimensional layered structure, was found to have favourable performances in removing contaminant. In this work, Fe 3 O 4 was successfully grown on the surface of flower-like MoS 2 by two-steps hydrothermal methods. The experimental results showed that the specific surface area of MoS 2 /Fe 3 O 4 (MF) was the largest when the ratio is 10 wt% (MF-10). Compared with pure MoS 2 , the specific surface area of MF-10 increased by 6.7467 m 2 /g, which was attributed to the growth of Fe 3 O 4 . At the same time, the introduction of Fe 3 O 4 made the MF possess superparamagnetism to facilitate its retrievability under an external magnetic field. In addition, MF-10 also showed a mercury removal efficiency of almost 100%. Although the efficiency of the MF-10 has decreased after 5 cycles and 24 h, it could still maintain about 90%, revealing a stable cycle life. Due to its mercury removal performance and recyclability, MF can be considered as a favorable adsorbent for removing elemental mercury.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Micro & Nano Letters
·
2018
·Vol. 13
·期 11
·1556-1559
·
IF 0.841
Lihui Yao,Yajuan Wang,Ya Li,Jingkuan Duan
Different Fe 3 O 4 particles are synthesised with silane and carboxylic acid, surface modified by co-precipitation, and subsequently are characterised by Fourier transform infrared spectroscopy, wide-angle X-ray diffraction, laser particle size analyser (LPSA) and thermogravimetric analyser (TG). Based on the LPSA results, Fe 3 O 4 particles are micrometre size due to the experimental condition and modifiers. It is therefore suggested that the vacuum freeze-drying and the long-chain modifiers tend to obtain small size particles. The modifiers density on the surface of Fe 3 O 4 particles is obtained by TG and formula calculation. It is shown that the silane coupling agent is more effective modifier for Fe 3 O 4 particles compared with carboxylic acid. In accordance with the molecular structure and functional group number of carboxylic acids, different carboxylic acids have different modifiers density.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Yang Guo,Xian Jian,Haipeng Lu
Engineering a lightweight and thin microwave absorber through the design of multiple heterogeneous interfaces represents a significant challenge. Here, we synthesized a nitrogen (N)-doped Ti 3 C 2 T x @Fe 3 O 4 (N–Ti 3 C 2 T x @Fe 3 O 4 ) nanocomposite with a sandwich-like structure through a solvothermal approach using hydrazine hydrate as the N donor. The numerous Ti 3 C 2 T x electron transfer pathways of Ti 3 C 2 T x enable the realization of a hierarchical conduction network within N–Ti 3 C 2 T x @Fe 3 O 4 . The introduction of defects through N doping and the integration of Fe 3 O 4 with Ti 3 C 2 T x are pivotal for enhancing the dipole polarization. The heterogeneous interfaces in N–Ti 3 C 2 T x @Fe 3 O 4 , coupled with Fe 3 O 4 components, substantially boost the electromagnetic wave (EMW) absorption performance of the composite. An optimal N integration and the loading of Fe 3 O 4 in Ti 3 C 2 T x result in an improved impedance matching of N–Ti 3 C 2 T x @Fe 3 O 4 . The synergistic effect of the improved impedance matching and the strong EMW attenuation capability endow N–Ti 3 C 2 T x @Fe 3 O 4 with enhanced microwave absorption (MA) properties. Specifically, at a thickness of 1.04 mm, the composite exhibits the effective absorption bandwidth (3.92 GHz; 14.08–18.00 GHz), surpassing that of Ti 3 C 2 T x . At a thickness of 0.98 mm, it exhibits a maximum reflection loss of −40.28 dB at 17.25 GHz, which substantially exceeds that of Ti 3 C 2 T x . Furthermore, it shows a maximum Radar Cross Section reduction of 21.32 dB cm 2 . A cotton fabric was coated with N–Ti 3 C 2 T x @Fe 3 O 4 , and it was found to exhibit enhanced heat conduction and dissipation, at rates 3.83 and 4.64 times greater than those of uncoated cotton, respectively. These results highlight the considerable potential of N–Ti 3 C 2 T x @Fe 3 O 4 nanocomposites for use in far-field applications. It is envisaged that the exceptional MA and thermal management properties of N–Ti 3 C 2 T x @Fe 3 O 4 nanocomposites will provide a novel avenue for crafting lightweight and thin EMW absorbing materials.
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
Journal of the Taiwan Institute of Chemical Engineers
·
2017
·
IF 4.217
Hao Luo,Shengxiao Zhang,Xiaoyan Li,Xia Liu,Qiang Xu,Junshen Liu,Zhenhua Wang
Tannic acid (TA) film covered magnetic microspheres (Fe 3 O 4 @TA–Fe 3+ ) was synthesized and applied for removal of Pb 2+ and Hg 2+ from aqueous solution. The resulted Fe 3 O 4 @TA–Fe 3+ was characterized with thermo-gravimetric analysis, vibrating sample magnetometer, transmission electron microscope, and Fourier transform infrared spectra. The adsorption of pollutants was pH dependent because the complexation of TA with Fe 3+ was disassembled at low pH. The composites showed high maximum adsorption capacity for Pb 2+ up to 1115.3 mg/g and Hg 2+ to 279.4 mg/g. Furthermore, the Fe 3 O 4 @TA–Fe 3+ composites could be easily separated from the solution by a magnet after adsorption because of the excellent superparamagnetic property. Thermodynamics study indicated that the adsorption of Pb 2+ and Hg 2+ on Fe 3 O 4 @TA–Fe 3+ sorbents was spontaneous, chaotic degree decreasing and endothermic process. The present results warrant the promising application of magnetic Fe 3 O 4 @TA–Fe 3+ composites for removal of Pb 2+ and Hg 2+ from contaminated water, and this study is the first application of TA film in environmental remediation.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2013
·
IF 3.172
Ge Liu,Dan Hu,Min Chen,Changchun Wang,Limin Wu
Multifunctional PNIPAM/Fe 3 O 4 –ZnS hybrid hollow spheres integrating magnetism, luminescence, and temperature responses into one single entity have been successfully fabricated via a facile method. First, the cross-linked Poly (N-isopropylacrylamide) (PNIPAM) hollow spheres were synthesized via a classical method, named one-pot “self-removing” process. Then, Fe 3 O 4 and ZnS nanoparticles were in situ precipitated on the surface of the PNIPAM hollow spheres. The PNIPAM/Fe 3 O 4 –ZnS hybrid hollow spheres exhibit magnetic property, which indicates the potential application in drug targeting. In addition, ZnS nanoparticles in the shell play an important role as a luminescent label for tracking the drug delivery. Meanwhile, the existence of PNIPAM provides a thermosensitive property. All these results indicate that the obtained composite can be expected to be used as a smart drug delivery material.
研究领域:
材料科学
·
生物医学工程
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF RARE EARTHS
·
2020
·
IF 3.104
Xiaowei Lv,Wenyi Huang,Xingcheng Ding,Jiangwei He,Qiumei Huang,Jialin Tan,Hao Cheng,Jun Feng,Lijun Li
In this study, Fe 3 O 4 @SiO 2 @ZnO:La microspheres were successfully prepared. The microspheres have the advantages of both ZnO doped with La and the Fe 3 O 4 @SiO 2 structure such that the former improves the photocatalytic activity of ZnO and the latter can be reused. The X-ray diffraction (XRD), a field emission scanning electron microscope (SEM), a field emission transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS), and a vibrating sample magnetometer (VSM) were used to characterize Fe 3 O 4 @SiO 2 @ZnO:La microspheres. Methyl orange was used as the model molecule to study the effect of the Zn 2+ concentration and the doping amount of La on the photocatalytic activity of Fe 3 O 4 @SiO 2 @ZnO:La microspheres. Results show that in the synthesis of Fe 3 O 4 @SiO 2 @ZnO:La microspheres, photocatalytic activity of the microspheres is enhanced first and weakened later with the increase of Zn 2+ concentration. In the La doping process, the photocatalytic activity of Fe 3 O 4 @SiO 2 @ZnO:La microspheres is enhanced with the increase in the La doping amount. The magnetic photocatalysts not only have high photocatalytic activity, but also can be reused. After being reused five times, the photocatalyst's degradation rate of methyl orange is still as high as 81%, which shows that magnetic photocatalysts have prospective wider applications in photocatalytic degradation of dye wastewater.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2025
·
IF 9
Fangzhou Wang,Ge Song,Mou Zhang,Shunan Zhao,Tuo Wang,Kai Zhao,Xin Wang,Ruiping Liu
Propionate accumulation is common in anaerobic digestion systems, while Fe 3 O 4 nanoparticles (Fe 3 O 4 NPs) show potential in steering direct interspecies electron transfer (DIET) to facilitate methanogenesis from propionate. However, the effect of Fe 3 O 4 NPs in stable microbial communities remains unclear. This study demonstrated that 1.0 g/L Fe 3 O 4 NPs enhanced propionate degradation and methane production by 220 % and 55 % of the propionate-acclimated microbial consortia post-shock loading, as evidenced by batch-test. High propionate concentrations suppressed Geobacter , yet Fe 3 O 4 NPs enabled electron syntrophy between alternative DIET-participants ( Arcobacter , Syntrophobacter ) and methanogens ( Methanothrix , Methanobacterium ) serving as electron conduits. Network analysis further revealed that Fe 3 O 4 NPs activated interactions among potential electroactive microbes, highlighting the potentially ubiquitous presence of electron syntrophy. Even in propionate-stressed microbial communities, such mutualism may be rapidly activated by Fe 3 O 4 NPs, offering a practical solution for mitigating propionate accumulation and enhance digester performance.
研究领域:
环境微生物学
·
生物能源
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nano Research
·
2020
·Vol. 13
·期 3
·621-629
·
IF 8.183
Pan Jialiang,Guo Honggui,Wang Min,Yang Hui,Hu Haowen,Liu Peng,Zhu Hongwei
Although Fe 3 O 4 particles have exhibited excellent microwave absorbing capacity and widely used in practical application due to the synergistic effect of magnetic loss and dielectric loss, their applications are still limited for the required high mass fraction in absorbers. To overcome this problem, the development of Fe 3 O 4 materials with low dimensional structures is necessary. In this study, the shape anisotropic Fe 3 O 4 nanotubes (NTs) with low mass ratios were applied to realize efficient microwave absorption. The NTs with different aspect ratios were prepared through facile electrospinning followed by two-step thermal treatments and mechanical shearing. The cross-linked nanotubular structure enabled the absorbers to have much higher electrical conductivity, multiple scattering, polarization relaxation and better anti-reflection surface, while the shape anisotropic NTs maintained significant multiple resonances with stronger coercivity. These all were beneficial to microwave absorption with enhanced dielectric loss, magnetic loss and sterling impedance matching. Results showed that the absorber with 33.3 wt.% of short Fe 3 O 4 NTs had minimum reflection loss of -58.36 dB at 17.32 GHz with a thickness of 1.27 mm, and had the maximum effective absorbing bandwidth (EAB) of 5.27 GHz when the thickness was 1.53 mm. The absorber with 14.3 wt.% of long Fe 3 O 4 NTs presented the widest EAB in certain radar band with attenuated 80.75% X band and 85% Ku band energy bellow -10 dB at the thickness of 2.65 and 1.53 mm, respectively. This study provided an approach for the development of shape anisotropic magnetic absorbing materials, and broadened their practical applications as magnetic absorbers.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Computational and Theoretical Nanoscience
·
2017
·Vol. 14
·期 7
·3203-3208
·
IF 0
Tang Zhuxing,Lu Guangming,Ai Meimei
With hydrothermal method synthesized Fe3O4@PDA@MOF-199 magnetic nano-materials and the materials were characterized through scanning electron microscopy, energy spectrum diagram, fourier infrared and vibrating sample magnetometer. Metal organic framework materials
has a large surface area and a good adsorption for heavy metal ions, and the magnetic nanomaterial was separated easily via a magnet from a solution. The optimal condition: material consumption of 5 mg, shock time for 1 h, pH = 5 and under the condition saturated adsorption amount of Fe3O4@PDA@MOF-199
magnetic nanomaterials to Pb2+ was 539 mg g−1. And using 0.1 mol L−1 EDTA solution as eluent to desorb the saturated Fe3O4@PDA@MOF-199 magnetic nanomaterials, the elution rate can reach 89.44%. In this paper, Fe3O4@PDA@MOF-199
magnetic nanomaterials were used to absord Pb2+ in actual sample.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
JOURNAL OF ALLOYS AND COMPOUNDS
·
2013
·
IF 2.39
Zhongshan Ren,Xiaojun Hu,Xiangxin Xue,Kuochih Chou
The solid state reactions in Fe 3 O 4 –TiO 2 system has been studied by diffusion couple experiments at 1323–1473 K, in which the oxygen partial pressure was controlled by the CO–CO 2 gas mixture. The XRD analysis was used to confirm the phases of the inter-compound, and the concentration profiles were determined by electron probe microanalysis (EPMA). Based on the concentration profile of Ti, the inter-diffusion coefficients in Fe 3 O 4 phase, which were both temperature and concentration of Ti ions dependent, were calculated by the modified Boltzmann–Matano method. According to the relation between the thickness of diffusion layer and temperature, the diffusion coefficient of the Fe 3 O 4 –TiO 2 system was obtained. According to the Arrhenius equation, the estimated diffusion activation energy was about 282.1 ± 18.8 kJ mol −1 .
研究领域:
材料科学
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2014
·Vol. 14
·期 7
·5047-5053
·
IF 1.339
Liu Li,Jiang Wei,Yao Lei,Yang Xi-Wen,Chen Bin-Hua,Wu Shi-Xi,Li Feng-Sheng
A novel Fe3O4@ZnS nanomaterial with fluorescent and superparamagnetic properties has been successfully fabricated via TOPO-TOP synthesis with an additional coordinating component (OAm). The adsorption of OAm on the preformed magnetite nanoparticles, which were
prepared in phenyl ether with oleic acid and oleyl amine, played an essential role in directing the structure of the Fe3O4@ZnS composites. The obtained materials were characterized by FTIR, TEM, XRD, X-ray photoelectron spectroscopy (XPS), UV-vis, fluorescence spectrophotometer
and VSM. The results indicated that the Fe3O4 nanoparticles were successfully combined with ZnS and the coating of ZnS can be controlled by adjusting the molar ratio of Fe3O4 to ZnS. The saturation magnetization values of Fe3O4,
Fe3O4@ZnS (1:2) and Fe3O4@ZnS (1:5) nanoparticles are 57.0 emu g−1, 44.4 emu g−1 and 34.2 emu g−1, respectively at 300 K and the nanocomposites exhibit better fluorescence without evident quenching.
The combined magnetic and fluorescent properties endow the nanocomposites with great potential applications in “nano-conveyer-belt” platform technology for drug targeting, bioseparation, diagnostic analysis and so on.
研究领域:
纳米技术
·
材料科学
·
生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）