TALANTA
·
2018
·
IF 4.244
Lin Hao,Weihua Liu,Chun Wang,Qiuhua Wu,Zhi Wang
Metal-organic coordination materials have received extensive attention because of their combined benefits of both inorganic and organic building blocks. In this work, the functional magnetic metal-phenolic networks with core-shell structure were prepared from phenolic ligand (tannic acid) and metal Zn 2+ via self-assembly. The magnetic metal-phenolic networks consist of magnetic Fe 3 O 4 core and metal-phenolic network shell which can act as carbon source. The Fe 3 O 4 @C nanocomposite was then synthesized by carbonizing the magnetic metal-phenolic networks. The prepared Fe 3 O 4 @C had a high surface area and nanoscale porosity. It was successfully applied as the magnetic absorbent to enrich chlorophenols from environmental water and soil samples. Good response linearity for the analytes was observed in the range of 0.1–100.0 ng mL −1 for water and 1.0–100.0 ng g −1 for soil samples, with correlation coefficient ≥ 0.9989 and ≥ 0.9924, respectively. The limits of detection calculated at a signal-to-noise ratio of 3 (S/N = 3) were in the range from 0.01 to 0.03 ng mL −1 for the water and 0.1–0.2 ng g −1 for the soil sample, respectively. The relative standard deviations were below 6.8%.
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PubMed
高影响因子
ACS Applied Bio Materials
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2018
·
IF 0
Xiaohong He,Xue Shen,Dongming Li,Yiyao Liu,Kun Jia,Xiaobo Liu
Nanoparticles exhibiting good biocompatibility and multifunctional optical, magnetic, and reactive properties are essential materials for the construction of next generation theranostics platforms. The core–shell structured CdSe@CdS is one of few semiconductor quantum dots (QD) that shows ideal photoluminescence for biological application including unity quantum yields, identical photoluminescence for ensembles and single dot, nonblinking, and antibleaching. However, overcoming toxicity concerns from Cd2+ is still a great challenge for promoting the practical medical application of the CdSe@CdS QD. Besides, the high quality luminescent and superparamagnetic nanoparticles at present are basically hydrophobic, which implies that the phase transfer of these functional nanoparticles into aqueous phase is the primary step to enable their biomedical application. Herein, we have developed a facile protocol to fabricate highly biocompatible nanoparticles showing both modulated luminescent and magnetic properties via a one-step self-assembling of amphiphilic block copolyarylene ether nitriles (amPEN), oleic acid stabilized CdSe@CdS QD, and Fe3O4 superparamagnetic nanoparticles (SP) in microemulsion system. Benefiting from the aromatic backbone structure of amPEN and its strong hydrophobic interaction with surface capping agent of QD/SP, the fabricated hybrid nanoprobe exhibits quite competitive colloids stability as well as fluorescent/magnetic properties, which ensures its application for in vitro fluorescence and magnetic resonance (MR) imaging of cancer cells.
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RESEARCH ON CHEMICAL INTERMEDIATES
·
2018
·Vol. 44
·期 10
·6369-6385
·
IF 1.674
Chen Zhangxu,Fu Ming-Lai,Huang Xiao-Dan,Yuan Baoling,Yang Jia-Cheng E.
To enhance photocatalytic activity spectra area of the TiO 2 based photocatalyst, and to separate and recycle photocatalyst easily, magnetic photocatalyst was prepared with β-NaYF 4 :Yb 3+ ,Tm 3+ , TiO 2 , Fe 3 O 4 as carriers, and tetraethyl orthosilicate as precursor. The magnetic infrared responsive photocatalysts were thoroughly characterized by field emission scanning electron microscopy, X-ray diffraction, a fluorescence spectrometer and UV–Vis–NIR diffuse reflectance spectroscopy. They showed that the composite of β-NaYF 4 :Yb 3+ ,Tm 3+ /TiO 2 /Fe 3 O 4 @SiO 2 (UCTFS) emits visible luminescence upon 980 nm excitation, and energy transfer from β-NaYF 4 :Yb 3+ ,Tm 3+ to TiO 2 was verified. The photocatalytic activities of the UCTFS were studied by orthogonal experiments for photodegradating methylene blue (MB). The degradation rate of MB can reach 86.69% under the optimal conditions. After the four recycles, the degradation rate remained 52.72%. It also showed that 50.27% of the degradation efficiency of phenol can be obtained under the same experimental parameters. These results suggest that magnetic UCTFS composite is stable and a magnetic NIR-driven photocatalyst for degradation of organic pollutants. Moreover, the NIR driven photocatalytic mechanism of this reported composite was proposed. The strategy suggested here may be indicated for the effective fabrication of magnetic NIR-driven photocatalyst for application in the water purification by full spectra of solar energy.
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高影响因子
SURFACE & COATINGS TECHNOLOGY
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2018
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IF 2.906
Chenyang Cao,Jiang Cheng
A robust superhydrophobic surface coated with copper stearate (CS) and Fe 3 O 4 nanoparticles was prepared on stainless steel mesh (SSM) by dip-coating method for oil/water separation. The superhydrophobicity of CS@Fe 3 O 4 SSM was found to be superior to that of SSM coated with bare CS because of the enhanced surface roughness by Fe 3 O 4 nanoparticles. The CS@Fe 3 O 4 SSM shows good performance in water repellency, self-cleaning property, long-term storage, mechanical and chemical stability. And it is capable of separating various immiscible oil/water mixtures even in extreme environments (such as highly acidic, alkaline, and salty solutions) with the separation efficiency > 98% and excellent recyclability. Furthermore, various surfactant-stabilized water-in-oil emulsions were successfully separated by the CS@Fe 3 O 4 SSM due to its good superhydrophobic and superoleophilic properties as well as dense hierarchical micro/nanostructure. The preparing approach of CS@Fe 3 O 4 SSM presented in this work is facile, inexpensive and environment-friendly, which enables the CS@Fe 3 O 4 SSM to be applied in actual oil/water separation.
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高影响因子
ANALYTICA CHIMICA ACTA
·
2018
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IF 5.123
Baoyi Shao,Xiaoyuan Ma,Sen Zhao,Yan Lv,Xu Hun,Haitao Wang,Zhouping Wang
Contamination of mycotoxins has been a general problem of food safety and afflicts people all around the world. Ochratoxin A (OTA), an abundant and representative food-contaminating mycotoxin, has a detrimental effect on our health. Herein, an ultrasensitive surface-enhanced Raman scattering (SERS) aptasensor was fabricated for OTA detection. Au (core) @Au-Ag (shell) nanogapped nanostructures ( [email protected] NNSs) were coupled with Fe 3 O 4 magnetic nanoparticles (Fe 3 O 4 MNPs) by OTA aptamer and its complementary DNA sequence . The distance between two nanoparticles become far away in presence of the OTA due to the affinity of aptamer. This effect can obviously bring about the change of Raman intensity which can be used for the detection of OTA. Compared with pure metal nanoparticles, [email protected] NNSs can effectively enhance the Raman intensity of Raman signal molecule (4-MBA) via the ultrasmall nanogap, which contribute to the sensitivity of the sensor system. Additionally, the utilization of Fe 3 O 4 MNPs offers a green, economical and facile technology to capture targets from solution. The specially modified aptamer and its complementary strand establish a bridge connecting between [email protected] NNSs and Fe 3 O 4 MNPs. In this study, OTA concentration with a linear range of 0.01–50 ng mL −1 and the limit of detection (LOD) was as low as 0.004 ng mL −1 . The proposed SERS aptasensor can combine both of these above type of materials and provide a rapid, sensitive, and low-cost methodology for numerous future applications of point-of-care diagnostics.
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高影响因子
RSC Advances
·
2018
·Vol. 8
·期 23
·12503-12516
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IF 2.936
Ping Li,Bing Qi,Kun Li,Junwei Xu,Meili Liu,Xuenan Gu,Xufeng Niu,Yubo Fan
Besides the particle size and surface performance, the shape also plays a key role in drug delivery systems. Red blood cells are the most abundant blood cells in the human body, and are excellent oxygen carriers, due to their unique biconcave discoid shape. In this study, red blood cell (RBC)-like Fe3O4/TbLa3(Bim)12/poly(lactic-co-glycolic acid) (PLGA) composite particles, with magnetic response and bioimaging functions, were prepared by electrospraying. Various electrospraying parameters, such as solvent, PLGA concentration, collecting distance and solution flow rate were investigated in detail to attempt to obtain RBC-like composite particles. The size distribution, morphology, structure, and hydrophobicity–hydrophilicity of particles were characterized. The results revealed the RBC-like Fe3O4/TbLa3(Bim)12/PLGA composite particles exhibited a strong green fluorescence and good magnetic behavior even when incubated with cells. Furthermore, the intensity of the magnetization and fluorescence can be adjusted by changing the contents of Fe3O4 and TbLa3(Bim)12. The effect on cell viability of the RBC-like Fe3O4/TbLa3(Bim)12/PLGA composite particles was evaluated in A549 cells and RBCs, and it was determined to have low cytotoxicity and excellent blood biocompatibility, suggesting that it is a promising candidate for application in drug delivery, targeting and tracking.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2018
·Vol. 28
·期 20
·1707440
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IF 13.325
Siming Yu,Guowei Li,Rui Liu,Dong Ma,Wei Xue
Nowadays, antibiotic abuse increases the emergence of multidrug-resistant bacterial strains, which is the major reason for the failure of conventional antibiotic therapies. Therefore, developing novel antibacterial materials or therapies is an urgent demand. In the present study, photothermal and NO-releasing properties are integrated into a single nanocomposite to realize more efficient bactericidal effects. To this end, polydopamine (PDA) coated iron oxide nanocomposite (Fe 3 O 4 @PDA) is used as a photoconversion agent and the core, first three generation dendritic poly(amidoamine) (PAMAM-G3) is grafted on the surface of Fe 3 O 4 @PDA, and subsequently NO is loaded with the formation of NONOate. The resultant Fe 3 O 4 @PDA@PAMAM@NONOate displays controllable NO release property under intermittent 808 nm laser irradiation and excellent bacteria-separation efficiency. Moreover, excellent synergistic photothermal and NO antibacterial effects are observed against both Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus , where bacterial viability and biofilm are significantly reduced. An antibacterial mechanism study reveals that the materials first adsorb onto the bacterial membrane, then cause damage to the membrane by the increased local temperature and the released NO under laser irradiation conditions, finally leak the intracellular components like DNA and induce bacteria death. The work provides a novel way for designing of antibacterial materials with higher efficiency.
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高影响因子
JOURNAL OF INORGANIC BIOCHEMISTRY
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2018
·
IF 3.063
Lei Wang,Chuansheng Cui,Rui Li,Shuling Xu,Haibo Li,Lianzhi Li,Jifeng Liu
Oxidative stress accompanies various diseases associated with chronic inflammation. In this work, H 2 O 2 and H 2 O 2 –Fe 3 O 4 magnetic nanoparticles were used as two reactive oxygen species to study the oxidative stress for the structure and polymerization behaviour of fibrinogen molecules. The alterations of secondary structure and component of fibrinogen molecule were characterized by circular dichroism spectra, ultraviolet-visible spectra and fluorescence spectra , the viscoelasticity of fibrinogen solution was studied by dynamic light scattering microrheology. Based on the molecular dynamics simulations and fluorescence properties, the possible oxidative stress sites were analyzed and confirmed by Tb 3+ probe. The hydrophobicity/philicity and electrostatic net charges present on the exterior part of the fibrinogen molecules were measured with zeta potential . The height and image analysis obtained from atomic force microscope indicated that oxidative stress of fibrinogen molecules could influence the equilateral junctions of protofibrils and the different cross-linking patterns between the α- and γ-chains, result in the decrease of the fibre size, form a higher proportion of branching and a denser aggregation state. This study will provide insights into the misfolding and fibril formation of disease-associated fibrinogen, facilitate an increased understanding of how oxidative stress in vivo affects the formation and polymerization of fibrin, and support efforts for the improved treatment of patients suffering from the thrombotic disease.
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高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2018
·Vol. 25
·期 31
·31705-31717
·
IF 2.8
Zheng Xiang,Wang Jinlin,Xue Xiaolong,Liu Wanxia,Kong Yadong,Cheng Rong,Yuan Donghai
In this research, the adsorptive removal of diclofenac sodium, one of the representative pharmaceuticals and personal care products, from aqueous solution using Fe 3 O 4 @MOF-100(Fe) magnetic microspheres was studied for the first time. The Fe 3 O 4 @MOF-100(Fe) microspheres exhibit strong magnetism and stability, which were observed as a core-shell structure. The maximum adsorption capacity of Fe 3 O 4 @MOF-100(Fe) for diclofenac sodium can reach 377.36 mg L −1 , which was higher than most of the adsorbents reported. The adsorption kinetics follows the pseudo-second-order kinetic equation. And the adsorption equilibrium of DCF can be described with Langmuir isotherm. In the cycle experiment, Fe 3 O 4 @MOF-100(Fe) material performed high adsorption efficiency for low-concentration diclofenac sodium solution, and the removal rate can still reach 80% after 5 cycles of adsorption without desorption. The mechanisms including electrostatic interaction, H-bond interaction, and π-π interaction that coexisted in the adsorption processes would be of benefit to enhance the adsorption capacity. The Fe 3 O 4 @MOF-100(Fe) magnetic microspheres offer exciting opportunities for further application.
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高影响因子
Journal of Nano Research
·
2018
·
IF 0.665
Wen Ting Liang,Dan Li,Xue Wen Ma,Wen Juan Dong,Jing Li,Rui Fang Wu,Chuan Dong,Qing Chen Dong
Surface β-cyclodextrin polymer coated Fe3O4 magnetic nanoparticles (NPs) were prepared by anchoring pyromellitic dianhydride derivate-b-cyclodextrin polymer (b-CD-P) onto the surface of Fe3O4 magnetic NPs, which is generated in situ through a co-precipitation method. The transmission electron microscopy (TEM) result indicates that Fe3O4@β-CD-P NPs have an effective average size of 15 ± 2 nm. The surface coated layer β-CD-P was confirmed by Fourier-Transformed Infrared Spectroscopy, and the amount of which was determined to be 138.2 mg g-1 by thermogravimetric analysis. To explore the potential application of such nanocomposites for organic pollutants adsorption, malachite green (MG), a typical cancer-causing water pollutant was evaluated by spectrophotometric method. It was finally learnt that, the adsorption rate of MG by Fe3O4@β-CD-P NPs follows pseudo-second-order kinetics with adsorption isotherm fitted by the Langmuir isotherm model well. The maximum adsorption capacity was measured to be 88.49 mg g-1 at 25 °C. Additionally, a good recyclability of the Fe3O4@β-CD-P was observed over four usage cycles, with slight decrease of adsorption capability.
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高影响因子
MATERIALS & DESIGN
·
2018
·
IF 4.525
Xiaolei Li,Wei Wang,Qianli Li,Han Lin,Yue Xu,Lin Zhuang
Organosilane-functionalized carbon dots (SiCDs) immobilized silica composite nanoparticles (Fe 3 O 4 @SiO 2 @mSiO 2 -SiCDs) with dually emissive properties have been prepared by a modified sol-gel method. Such Fe 3 O 4 @SiO 2 @mSiO 2 -SiCDs nanoparticles solution exhibits blue light emission with a maximum wavelength of 470 nm at lower concentrations, and red-shifts to yellow-green light emission with maximum wavelength of 565 nm at higher concentrations, which is different with traditional carbon dots composite materials displaying strong emission only in the blue-light region. The SiCDs are immobilized in the outer mesoporous silica layer by covalent bonds via proper blending ration, which enables the nanoparticles solution to possess excellent fluorescence stability. The Fe 3 O 4 @SiO 2 @mSiO 2 -SiCDs nanoparticles show good stability, high surface area (483.19 m 2 /g), high saturation magnetization (22.1 emu/g) and low remanence (0.217 emu/g). When the concentration of nanoparticles solution is increased, the distance between the nanoparticles decreases and exhibits the concentration-mediated scattering phenomena, which result in the red-shift of fluorescent peaks. The specific structure of the Fe 3 O 4 @SiO 2 @mSiO 2 -SiCDs nanoparticles and the concentration-mediated scattering phenomena play key roles in the red-shift appearing.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2018
·
IF 3.235
Jing Zheng,Min Zhang,Yang Ling,Jingli Xu,Shunzhong Hu,Tasawar Hayat,Njud S. Alharbi,Fan Yang
In this paper, multifunctional nanotubes were prepared by directly combing iron oxide (Fe 3 O 4 ) nanoparticle(NPs) decorated carbon nanotubes (CNTs), and palladium (Pd) NPs together with polypyrrole (PPy) in a facile way. Firstly, magnetic CNT composite (CNTs/Fe 3 O 4 ) was synthesized by the high temperature decomposition process, then PPy could be easily immobilized on the magnetic CNTs. Furthermore, Pd NPs were accumulated on the surface of CNTs/Fe 3 O 4 @PPy to obtain one dimensional CNTs/Fe 3 O 4 @PPy/Pd composite. The composite extraordinary amplified the electrochemical response, providing a highly sensitive electrochemical platform for triclosan detection. This electrochemical sensors had the advantage of fast response, cheap instrument, low cost, simple operation, high sensitivity and real-time detection in situ condition. Moreover, the sensor exhibited a wide linear response range for triclosan (2.247 × 10 −9 M to 2.752 × 10 −7 M) with a detection limit of 1.417 × 10 −9 M, respectively. In addition, the electrochemical sensor reported herein was applied for the detection of triclosan in real samples, revealing promising applications in developing the sensor for environmental inspection and monitoring.
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高影响因子
危险品化学品经营许可证（带存储）