Journal of Materials Chemistry A
·
2016
·Vol. 4
·期 37
·14392-14399
·
IF 8.262
HaiPeng Bai,YaPing Zheng,TianYu Wang,NingKun Peng
A magnetic, solvent-free nanofluid with a core–corona–canopy structure based on Fe3O4/polyaniline is synthesized for the first time. The solvent-free nanofluid has magnetic properties owing to the Fe3O4 core, flow ability because of the flexible chain canopy, and conductivity due to the conductive polyaniline corona and Fe3O4 core. The canopy structure possesses a nanofluid fraction of 87.7 wt%, which is high enough for it to act as the continuous phase and thus warrant fluidity. The liquid property is verified by rheological test. The percentage of crystallinity of the solvent-free nanofluid is 43%. The electric conductivity of the solvent-free nanofluid changes with temperature. The conductivity of the aqueous solution of the nanofluid can be adjusted by changing the strength or direction of the magnetic field. The fabricated solvent-free nanofluid has wide potential for application; for example, its CO2 capture capacity can reach 3.1 mmol g−1. With magnetic responsiveness, the Fe3O4/polyaniline nanofluid aqueous solution can be used in magnetic field detection.
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
COMPOSITES SCIENCE AND TECHNOLOGY
·
2014
·
IF 3.633
Wei Yao,Tao Ni,Shujun Chen,Hao Li,Yun Lu
Novel hybrid nanocomposites constructed via anchoring the Fe 3 O 4 @polypyrrole nanospheres with hierarchical porous structure on graphene nanosheets (graphene/Fe 3 O 4 @polypyrrole, GFP) have been prepared, and characterized by using TEM, XRD , XPS, FT-IR and TGA . The large saturation magnetization of 12.4 emu g −1 allows fast and economic separation of the GFP from solution. Due to the synergic effect between graphene and Fe 3 O 4 @polypyrrole, the GFP exhibits excellent adsorption capability of 348.4 mg g −1 for Cr(VI) removal, which is much higher than the previously reported values of other magnetic nanomaterials . Furthermore, the GFP is stable and recyclable, retaining about 72.2% of the removal efficiency after six adsorption–desorption cycles. The adsorption isotherms and kinetics could be well simulated by the Langmuir and pseudo-second-order models respectively. The GFP nanocomposites could be a good candidate for efficient Cr(VI) removal from the wastewater.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Catalysts
·
2024
·Vol. 15
·期 1
·24
·
IF 3.8
Yaohui Xu,Yong Li,Zhao Ding,Yang Zheng
To further enhance the safety and energy efficiency of the Fe3O4preparation experiment, we proposed a strategy for synthesizing monodisperse Fe3O4microspheres through a one-step solvothermal process. In this environmentally friendly synthesis method, stable FeCl3∙6H2O was utilized as the sole raw material, while ethylene glycol, characterized by its high boiling point and favorable safety profile, served as the solvent. Additionally, inexpensive and readily available urea was selected to function either as a mineralizer or surfactant. Through this one-step solvothermal reaction, the target product of Fe3O4could be obtained without subsequent calcination under reducing or inert atmospheres, thereby enhancing experimental safety and promoting energy conservation. By controlling the amount of urea added, it became feasible to produce monodisperse magnetic Fe3O4microspheres characterized by complete crystallinity and high yield. Utilizing the as-synthesized Fe3O4as a catalyst, we investigated its photocatalytic activity against xylenol orange organic dyes along with its regeneration characteristics. When 40 mmol of urea was incorporated into the reaction mixture, the resulting Fe3O4sample exhibited optimal photocatalytic performance; a 20 mg/L xylenol orange solution became colorless and transparent after just 1.5 h of UV light irradiation. Furthermore, during five consecutive regeneration cycles, its catalytic activity could be restored to its initial level. Importantly, Fe3O4demonstrated excellent magnetic sensitivity properties that facilitated rapid targeted separation under an external magnetic field, providing convenience for recovery and collection purposes.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 36
·15396-15402
·
IF 3.288
Lina Zhang,Min Zhang,Libin Liu,Yanqin Wang,Jing Zheng,Jingli Xu
Decoration of transition metal Ni nanoparticles (NPs) on magnetic supports is of special interest for histine-rich protein adsorption. Through a combination of a hydrothermal reaction, a mussel-inspired coating and a carbonization strategy, we have investigated two synthetic paths to access hierarchical nickel-based magnetic nanostructures: (1) Fe3O4 spheres are covered with hierarchical NiMoO4 nanosheets and subsequently coated with a polydopamine (PDA) layer, and Fe3O4@MoO2∩C–Ni composites are synthesized after pyrolysis in a nitrogen atmosphere, and (2) Fe3O4 spheres are coated with PDA and subsequently covered with hierarchical NiMoO4 nanosheets, and then Fe3O4@C∩MoO2–Ni composites are obtained after pyrolysis in a nitrogen atmosphere. We find that only route 1, which can be defined as a space-confined carbonization strategy, results in the formation of a high coverage of nickel NPs with tiny diameter decorated on Fe3O4 spheres. Route 2, defined as a non-space-confined carbonization strategy, leads to the formation of low density and large size Ni NPs. Detailed examination of the nickel-based magnetic composites obtained by route 1 displayed superior adsorption capacity for BHb than that of route 2. The results demonstrated that the space-confined strategy is greatly beneficial for the synthesis of Ni-based magnetic composites with high coverage, which would pave a novel way for synthesizing high density Ni-based magnetic composites.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 137
·期 15
·48564
·
IF 2.188
Yunyun Yu,Yanlai Wang,Penghu Deng,Tonghua Zhang
This work presented a new method for preparing cellulose nanofibril (CNF)/Fe 3 O 4 @rGO composite aerogels with enhanced magnetic and mechanical properties. The composite aerogels were obtained through compounding, gelling, washing, tert -butanol replacing, and freeze-drying. The structural characteristics of composite aerogels were investigated via scanning electron microscopy, Fourier transform infrared, and X-ray diffraction. Results showed that the composite aerogels had interconnected three-dimensional porous network microstructures, and the Fe 3 O 4 @rGO hybrids were uniformly dispersed in the aerogels. Moreover, the aerogels' magnetization and compression characteristics were also studied. Magnetic measurements indicated that composite aerogels had good magnetization characteristics with the saturation magnetization value of 6.75 emu/g. The uniaxial compression tests showed that the compression strength and Young's modulus of the composite aerogels were significantly improved by 32.33 and 118.56%, respectively, relative to those of CNF aerogels. The perfect combination of structure and performance may render the composite aerogels useful for commercial applications in the fields of environmental engineering, biomedical engineering, electronics, and energy. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 48564.
研究领域:
材料科学
·
环境工程
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
·
2019
·
IF 2.606
Mengzhu Kong,Yaling Huang,Ruilin Yu,Juqun Xi
Multistimuli-responsive vehicles that deliver drugs in temporal-, spatial- and dosage-controlled manners have developed as a potential platform in tumor therapy. However, how to integrate these functions in one single carrier effectively still presents a lot of challenge. Here, we developed a strategy to construct a photothermal and pH responsive platform based on Zn 2+ coordination with doxorubicin (DOX) and polydopamine (PDA) on the surface of magnetic nanoparticles (Fe 3 O 4 @PDA-Zn 2+ -DOX NPs). In this architecture, Fe 3 O 4 @PDA nanoparticles triggered photothermal effects for tumor hyperthermia, and Zn 2+ coordinated DOX was released in responding to the thermal effect to achieve chemotherapy simultaneously. Moreover, DOX release was further promoted at acidic environment due to the pH sensitivity of Zn 2+ coordination. Therefore, our system possesses multiple effects in tumor treatment: photothermal therapy with near infrared lighting (NIR), thermosensitive DOX release for chemotherapy, and pH-responsive DOX release to enhance deeper therapy in tumor acidic microenvironment. Our in vivo results provide the evidence that Fe 3 O 4 @PDA-Zn 2+ -DOX NPs upon laser exposure have effective anti-tumor therapeutic activity, indicating this platform is suitable for enhanced chemo-photothermal synergistic tumor therapy.
研究领域:
肿瘤学
·
纳米医学
·
药物递送系统
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2015
·Vol. 18
·期 5
·714-720
·
IF 4.034
Kai Sun,Changgeng Sun,Shaokun Tang
Coralloid Fe3O4 nanoclusters stacked by nanosheets are successfully synthesized using ferric nitrate as a precursor with an ionic liquid-assisted solvothermal method. For comparison, spherical Fe3O4 nanoclusters assembled by nanospheres are synthesized in the absence of ILs. The morphologies and structures of the products are further characterized by field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), X-ray power diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The results indicate that the ionic liquid 1-n-decyl-3-methylimidazolium chloride ([Dmim]Cl) plays an important role in controlling the growth orientation of building blocks via selectively adsorbing on a specific crystal plane. A formation mechanism has been proposed based on the interaction between ILs and Fe3O4 crystal planes. The catalytic activity of nanoclusters has been evaluated with the Fenton reaction under UVA irradiation. The coralloid nanoclusters show the highest catalytic activity for the degradation of phenol due to their special morphology and unique surface properties. The synthesis strategy may provide a new way to construct nanomaterials with novel morphologies and excellent properties.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
NANO
·
2022
·
IF 1.438
Junfeng Zhang,Yajie Li,Yuxi Zhang,Yinghua Wu,Jiale Ju,Wen He,Chenchen Li
Magnetic nanoparticles (MNPs) used in bio-application have accelerated the development of “theranostics” which contains imaging, therapy and drug delivery. However, in a protein-rich physiological fluid, MNPs are ineluctable to a contact with protein to form “protein corona”, which will significantly change the physicochemical properties of the particles and their biological behavior. Therefore, we investigated the influence of protein and static magnetic field (SMF) on the cytotoxicity and cellular uptake of MNPs. The Fe 3 O 4 nanoparticles (Fe 3 O 4 NPs) were synthesized by solvothermal method with a mean diameter of ∼ 1 0 0 nm functionalized with carboxyl groups. After a period of 12 h incubation in complete medium (CM), the wrapping of the Fe 3 O 4 NPs by protein adsorption resulted in about 40-nm increase of the hydrodynamic size. Their stability in CM and water solution did not broaden significantly over time, which is exactly opposite in serum-free media (SFM). When transferred to SFM with high ionic-strength, the Fe 3 O 4 NPs aggregated and settled quickly. We explore that the cell viability was decreased in proportion to the concentration and incubating time of Fe 3 O 4 NPs, the absence of FBS and the presence of SMF exposure, respectively. Quantitative analysis showed that cells could incorporate more NPs in SFM, about five-fold more than in CM. In addition, it is obvious that exposure to SMF resulted in more cellular uptake both in CM and SFM. Our results demonstrated that Fe 3 O 4 NPs in SFM and SMF exposure would settle down to cell rapidly, which caused more cellular uptake and higher cytotoxicity.
研究领域:
生物医学工程
·
毒理学
·
纳米医学
✓ 已验证
产品关联
DOI
高影响因子
WATER AIR AND SOIL POLLUTION
·
2023
·Vol. 234
·期 7
·1-18
·
IF 2.9
Liu Xiaokai,Li Xilin,Zhao Baiyun,Zhou Lijuan,Wang Li
Salix is an abundant renewable resource with wide sources and low cost. Therefore, a magnetic fiber membrane adsorbent for removing tetracycline (TC) in water was prepared from Salix wood powder. The optimum preparation conditions were discussed, and the optimum initial TC concentration, pH value, adsorption temperature, and adsorption time were determined. In the meantime, the maximum adsorption amount reached 538.73 mg·g −1 . The adsorption process belongs to the multi-molecular layer adsorption with chemical adsorption as the main factor and physical adsorption as the auxiliary factor. The adsorption process is mediated by multiple mechanisms including intramolecular diffusion, electrostatic interaction, hydrogen bonding, and chemical ion exchange, and the adsorbent was easy to separate from water. The results show that the magnetic cellulose membrane is a promising adsorbent which deserves further study. Graphical Abstract
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
Nanomaterials
·
2023
·Vol. 13
·期 16
·2288
·
IF 5.3
Haibing Hu,Yunhu Hu,Baozhu Xie,Jianxiong Zhu
Currently, heavy metal ion pollution in water is becoming more and more common, especially As (III), which is a serious threat to human health. In this experiment, a glassy carbon electrode modified with Fe3O4/MoS2nanocomposites was used to select the square wave voltammetry (SWV) electrochemical detection method for the detection of trace As (III) in water. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) showed that Fe3O4nanoparticles were uniformly attached to the surface of MoS2and were not easily agglomerated. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) showed that Fe3O4/MoS2has higher sensitivity and conductivity. After optimizing the experimental conditions, the Fe3O4/MoS2-modified glassy carbon electrode exhibited high sensitivity (3.67 μA/ppb) and a low detection limit (0.70 ppb), as well as excellent interference resistance and stability for As (III).
研究领域:
环境科学
·
分析化学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Na Li,Zhenyuan Ji,Lizhi Chen,Xiaoping Shen,Yifei Zhang,Shiqing Cheng,Hu Zhou
In this study, highly dispersed Ag nanoparticles anchored on Fe 3 O 4 modified polydopamine sub-micrometer spheres (PSS) nanocomposites were fabricated by a facile two-step approach. The catalytic properties of the as-obtained PSS/Fe 3 O 4 /Ag ternary nanocomposites were evaluated with the reduction of 4-nitrophenol by NaBH 4 as a model reaction. It is shown that the presence of Fe 3 O 4 can significantly decrease the particle size of the in-situ formed Ag nanoparticles on PSS, and optimize the catalytic performance of PSS/Ag nanocomposites. Additionally, the as-synthesized PSS/Fe 3 O 4 /Ag ternary nanocomposites exhibit high catalytic stability for recycle. Magnetic study reveals that the ternary nanocomposites display room-temperature superparamagnetic behavior. It is believed that this simple and effective method can be extended for the preparation of other polydopamine-based multicomponent nanocomposites with intriguing property, which would hold great promise for a variety of applications.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
·
2024
·
IF 8.1
Xiaochang Lin,Bo Sun,Pengsen Wang,Min Zhao,Dejia Liu,Qiyu Zhang,Baile Wu,Dezhao Liu
A magnetic Fe n UiO-66 adsorbent was created to achieve high phosphate adsorption capacity. The incorporation of Fe 3 O 4 facilitated the precipitation and growth of UiO-66 during crystallization, resulting in a shift towards a multilayer heterogeneous distribution of adsorption sites. The increased Fe 3 O 4 content notably enhanced the magnetic properties of Fe n UiO-66, while negligibly affecting its adsorption performance. The Fe 1.5 UiO-66 demonstrated exceptional phosphate adsorption capacity (136.54 mg/g), outstanding selectivity, and sustained reusability, with an 80% removal efficiency after nine cycles of treating actual water. The mechanism of phosphate adsorption by Fe n UiO-66 involved electrostatic attraction, ligand exchange, and linker exchange. Notably, while linker exchange significantly contributed to high adsorption capacity, it resulted in irreversible damage to the Fe n UiO-66 crystal. These unequivocal findings will serve as a solid foundation for further research and underline the critical role of linkers in the process of phosphate adsorption.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）