Journal of Inorganic and Organometallic Polymers and Materials
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2021
·Vol. 32
·期 2
·478-485
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IF 3.543
Abdallah Rusul Mohammed,Al-Haddad Raad M. S.
Core–shell nanoparticles (CSNPs) have attracted attention in biomedical applications as they have highly useful materials with modified characteristics, such as high stability, dispersibility, higher permeability to certain target cells and reduction in consumption of precious materials. Synthesis of core–multishell nanoparticles with suitable sizes, structural characteristics and absorption using simple methods continues to be a challenge. In this study, \({\text{F}\text{e}}_{3}{\text{O}}_{4}@\text{A}\text{u} @{\text{S}\text{i}\text{O}}_{2}\) CSNPs were synthesized in three stages to control their size and the potential for tuning their properties. Field emission scanning electron microscope images confirmed that \({\text{F}\text{e}}_{3}{\text{O}}_{4}@\text{A}\text{u} @{\text{S}\text{i}\text{O}}_{2}\) CSNPs have a small particle size of about 22.5 nm, average crystalline size in X-ray diffractometer analysis was 22.8 nm, stability was about − 49.1 mV, and synthesis with magnetic and optical properties improved their biocompatibility. Treatment of CAL-51 and HBL-100 cell lines by \({\text{F}\text{e}}_{3}{\text{O}}_{4}@\text{A}\text{u} @{\text{S}\text{i}\text{O}}_{2}\) CSNPs under NIR laser and alternating magnetic field generated enough heat to increase cell death.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
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IF 8.2
Zhaoyun Liu,Xi Wang,Chen Zhang,Kui Lin,Jian Yang,Yi Zhang,Jia Hao,Fei Tian
The development of multifunctional magnetic nanocomposites as a drug delivery system for cancer therapy is highly desirable in current nanomedicine. Herein, folic acid-bovine serum albumin conjugate (FA-BSA) was modified on nanocomposites by combining quantum-sized Fe 3 O 4 and layered double hydroxide (LDH) to obtain a novel FA-BSA/Fe 3 O 4 @LDH for the delivery of the anticancer drug 5-Fluorouracil (5-Fu). The prepared nanocomposites showed good dispersibility, colloidal stability, magnetic property and erythrocyte compatibility. FA-BSA/Fe 3 O 4 @LDH/5-Fu showed pH responsiveness, with both the amount and duration of release of FA-BSA/Fe 3 O 4 @LDH/5-Fu being significantly higher in pH 5.0 release medium than in pH 7.4 release medium. The cellular experiments implied that no significant cytotoxicity of FA-BSA/Fe 3 O 4 @LDH, particularly due to the presence of FA-BSA, which further enhanced the biocompatibility of the nanocomposite. Furthermore, FA-BSA/Fe 3 O 4 @LDH/5-Fu could specifically target the 2D HepG2 cells model and 3D hepatoma cell microspheres model in vitro , and efficient internalization through folate receptor-mediated endocytosis , showing excellent anti-cancer cell activity in a concentration-dependent manner. Therefore, the constructed FA-BSA/Fe 3 O 4 @LDH was able to provide a potential novel multifunctional nanocomposite for magnetic-targeting drug delivery and pH-responsive release of drugs to enhance the efficiency of cancer therapy.
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MATERIALS RESEARCH BULLETIN
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2023
·
IF 5.4
Hemin Wang,Yanling Hao,Lele Xiang,Xiaosi Qi,Lei Wang,Junfei Ding,Yunpeng Qu,Jing Xu,Wei Zhong
Interfacial and/or magnetic-dielectric synergistic effects are important avenues to boost microwave absorption properties. In order to simultaneously utilize these effects, we elaborately designed mixed-dimensional Fe 3 O 4 -FeCO 3 /multi-walled carbon nanotubes (MWCNTs)/reduced graphene oxide (RGO) multicomponent nanocomposites (MCNCs) in large scale via a facile process of hydrothermal and freeze-drying. The microstructural investigation revealed that two-dimensional RGO, one-dimensional MWCNTs and zero-dimensional Fe 3 O 4 -FeCO 3 nanoparticles were well bounded to generate the typical mixed-dimensional structure. By controlling the amounts of initial reactants, the Fe 3 O 4 -FeCO 3 /MWCNTs/RGO MCNCs displayed improved impedance matching features, polarization and conduction loss abilities, which lead to the evidently improved electromagnetic absorption properties. The Fe 3 O 4 -FeCO 3 /MWCNTs/RGO MCNCs simultaneously exhibited excellent absorption ability, large absorption bandwidth, low density and thin matching thickness. Generally, this work not only proposed an effective route to make the best of magnetic-dielectric synergy and interfacial strategy for exploiting novel microwave absorption materials, but also presented a simple approach to synthesize magnetic MWCNTs/RGO-based mixed-dimensional MCNCs.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Zhi-Qiang Hou,Wen-Ping Hu,Guo-Hua Yang,Zi-Xuan Zhang,Tian-Yi Cheng,Ke-Jing Huang
The production of high-purity hydrogen using surplus electrical energy and abundant water resources has immense potential in mitigating the fossil energy crisis, as hydrogen fuel holds clean, pollution-free, and high-energy characteristics. However, the practical application of large-scale hydrogen production from water faces challenges such as high overpotentials, sluggish dynamics, and limited electrocatalytic lifetime associated with the hydrogen evolution reaction (HER). Here, we fabricated the sandwich structure of a Ni/Fe 3 O 4 @poly(3,4-ethylene-dioxythiophene)/Ni (Ni/Fe 3 O 4 @PEDOT/Ni) electrode and employed a strong magnet to obtain a magnetic electrode capable of achieving high-activity and durability for HER. Electrochemical analysis reveals that the activated magnetic electrode displays a significantly reduced overpotential and an extended electrocatalytic lifetime of 10 days. Notably, its stability is higher than that of non-magnetic Ni/Fe 3 O 4 /Ni and Ni/Fe 3 O 4 @PEDOT/Ni electrodes, primarily due to the support from magnetic force and the protective PEDOT layer. Moreover, the minute atomized droplets can form the H 2 O 2 species in a moist environment, facilitating the formation of the NiO layer on the Ni surface, which plays a vital role in boosting catalytic activity. In conclusion, our magnetic electrode strategy, combined with the emergence of the NiO layer, offers valuable insights for the development of advanced HER electrodes.
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JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
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2023
·
IF 2.7
Qingzhi Zhu,Xiang Luo,Haifeng Li,Jiabao Zang,Jihui Sun,Xutao Yan,Yijian Liu
Pure magnetic materials always exhibit mediocre microwave absorption performance due to the poor impedance matching and negligible dielectric loss capability. In this study, a novel porous aggregates of multi-element doped Fe 3 O 4 /(Fe, Co, Ni, Cu) alloys (denoted as DF/alloys) composite which is composed of magnetic/magnetic heterostructure with excellent microwave absorption performance were prepared. By reducing part of the ferrimagnetic spinel into ferromagnetic alloy, the saturation magnetization M s was enlarged which is beneficial to exceeding the Snoek′s limit, and the magnetic loss capability was further enhanced significantly. Furthermore, the abundant heterogeneous interfaces in the DF/alloys composites have greatly improved the dielectric loss capability and balanced the complex permittivity and the complex permeability, and achieved superior impedance matching of the magnetic/magnetic heterogeneous DF/alloys composites. When the loading ratio (DF/alloys to paraffin mass ratio) was only 30 wt%, the widest effective absorption bandwidth ( EAB ) reached 5.58 GHz (3.2 mm). when the loading ratio was up to 50 wt%, the widest EAB (6.4 GHz) was achieved at 2.0 mm and the minimum reflection loss ( RL min ) reached −49.3 dB at 4.15 GHz. As microwave absorption materials, the DF/alloys composites are extremely promising and competitive.
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SENSORS AND ACTUATORS B-CHEMICAL
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2021
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IF 7.46
Wei Yang,Chenyuan Weng,Xiaoyun Li,Hongliang He,Jianwen Fei,Wei Xu,Xiaoqiang Yan,Wanying Zhu,Hongsong Zhang,Xuemin Zhou
At present, artificial mimic enzyme has become a powerful substitute for natural enzyme. In particular, the biosensors based on nano-enzymes have been the focus of current research. Herein, a novel magnetic ternary nanocomposite hemin-Fe 3 O 4 @polypyrrole (h-Fe 3 O 4 @ppy) was synthesized by chemical oxidation polymerization. The results showed that the h-Fe 3 O 4 @ppy had stronger peroxidase activity than Fe 3 O 4 nanoparticles (Fe 3 O 4 NPs) and h-ppy NPs, and was indicated by Michaelis-Menten constant (K m ) and maximum initial velocity (V max ). Therefore, we used h-Fe 3 O 4 @ppy catalyzing H 2 O 2 to oxidize the chromogenic substrate TMB, and built Hydrogen peroxide (H 2 O 2 ) and Glutathione (GSH) colorimetric biosensors with the help of signal intrinsic exponential amplification and easy operation. The controllable catalysis was realized by h-Fe 3 O 4 @ppy which was prone to separation. The method of removing h-Fe 3 O 4 @ppy by magnetic separation effectively eliminated the effect of residual catalysis when terminating the reaction. The sensor was then applied to the determination of GSH in biological samples from acute coronary syndrome patients. The linear ranges of H 2 O 2 and GSH were 0.2–100 μM and 0.5–80 μM, respectively. The detection limits of H 2 O 2 and GSH are 0.18 μM and 0.15 μM, respectively. This research not only proposes a new type of nanoenzyme, but also shows the multiple advantages of magnetic nano-enzymes for the construction of biosensors.
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JOURNAL OF POLYMER RESEARCH
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2021
·Vol. 28
·期 3
·1-11
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IF 3.097
Yang Jiafei,Shang Jingqi,Chen Jiewei,Xue Feng,Ke Zunye,Zhang Xiangfen,Ding Enyong
In this study, a simple method was used to synthesize a new type of magnetic composite material BNNS@ Fe 3 O 4 . In the PVP aqueous solution, the h-BN surface was exfoliated by a high-pressure homogenizer to obtain a few layers of BNNS. Then FeCl 3 ·6H 2 O and hydrazine hydrate were added for reduction treatment, and deposited Fe 3 O 4 nanoparticles on the surface of BNNS. PVP can not only stabilize a few layers of BN, but also promote the formation of Fe 3 O 4 . Through SEM, TEM, XRD, XPS and other characterization methods, the composition and surface morphology of the composite material were determined. Furthermore, the adsorption of Congo red by the composite material was explored. The removal rate of Congo Red by composite of BNNS @ Fe 3 O 4 (0.1) was 39% after 12 h reaction at 323 K. But adsorption capacity also increased with time, when the time was extended to 48 h, its maximum removal rate of Congo Red was 83% and the adsorption capacity was 499 mg/g at 313 K. The adsorption kinetics and thermodynamics of the composite material for Congo red at 313 K were studied. The adsorption process was more consistent with the pseudo-second-order kinetic equation. The composite nanoparticles can move directionally under the action of a magnetic field, which also has potential application value in thermal conductivity.
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Analytical Methods
·
2021
·Vol. 13
·期 11
·1412-1421
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IF 2.896
Wenjia Fan,Dan Yang,Nan Ding,Puyu Chen,Lei Wang,Guanwei Tao,Feng Zheng,Shunli Ji
Core–satellite-structured magnetic nanosorbents (MNs) used for the selective extraction of macrolide antibiotics (MACs) were prepared in this study. The MNs (core–satellite polydopamine-coated Fe3O4 nanoparticles–hollow porous molecularly imprinted polymer) consisted of polydopamine-coated Fe3O4 nanoparticles (Fe3O4@PDA) “core” linked to numerous hollow porous molecularly imprinted polymer (HPMIP) “satellites” with bridging amine functional groups. It is worth mentioning that HPMIPs act as “anchors” for selectively capturing target molecules. Polymers were characterized using TEM, SEM, FT-IR, VSM, and TGA and applied as magnetic dispersive solid-phase extraction (MDSPE) sorbents for the enrichment of trace MACs from a complex food matrix prior to quantification by HPLC-MS/MS. Nanocomposites revealed outstanding magnetic properties (36.1 emu g−1), a high adsorption capacity (103.6 μmol g−1), selectivity (IF = 3.2), and fast kinetic binding (20 min) for MACs. The multiple advantages of the novel core–satellite-structured magnetic molecularly imprinted nanosorbents were confirmed, which makes us believe that the preparation method of the core–satellite MNs can be applied to other fields involving molecular imprinting technology.
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JOURNAL OF HAZARDOUS MATERIALS
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2020
·
IF 9.038
Jun Hu,Hao Chen,Huiyu Dong,Lulu Zhu,Zhimin Qiang,Jianming Yu
ABSTRACT Cast iron pipes are commonly applied in drinking water distribution systems (DWDSs); peroxymonosulfate (PMS) is a promising alternative for drinking water disinfection; organic micropollutants is still present in drinking water after waterworks’ treatment. However, iron corrosion products may affect the reactions between a disinfectant and organic micropollutants. The study investigated the transformation of iopamidol (IPM) and atrazine (ATZ) by PMS under the catalysis of a composite iron corrosion product (Fe/Fe 3 O 4 ). The pseudo-first-order rate constants ( k ) for the degradation of IPM and ATZ were 1.47 and 1.03 min –1 , respectively. Electron paramagnetic resonance (EPR) experiments indicated that PMS was effectively activated to yield sulfate radical (SO 4 •− ) and hydroxyl radical (HO • ), mainly via the reduction by Fe component, dissolved Fe 2+ and generated F eocta 2 + . SO 4 •− contributed more than HO • to the degradation of IPM and ATZ, and the radical yield achieved 0.97 mol/mol. The k values reached maximum with Fe/Fe 3 O 4 and PMS doses of 2.5 g L –1 and 25 mg L –1 , respectively. The optimum mass fraction of Fe 3 O 4 in Fe/Fe 3 O 4 (MF mag ) and pH were 10% and 7.0, respectively. The k values increased with increasing temperature, while decreased in the presence of water matrix. Most of the iodine released from IPM was oxidized to IO 3 − , and NH 4 + was the dominant species of nitrogen released from ATZ. The identification of transformation intermediates showed that the radical chain reactions of IPM was mainly initiated from single electron transfer and radical adduct formation, while those of ATZ was primarily initiated from hydrogen atom abstraction and radical adduct formation.
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MICROCHEMICAL JOURNAL
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2020
·
IF 3.594
Wenfei Zhao,Xu Jing,Yaqin Tian,Cuiping Feng
A novel approach using magnetic Fe 3 O 4 @ porous activated carbon effervescent tablet-assisted deep eutectic solvent-based dispersive liquid–liquid microextraction (META-DES-DLLME) combined with HPLC was developed for the measurement of phenolic endocrine disrupting chemicals (bisphenol A, p - tert -octylphenol, nonylphenol) in environmental water. In the proposed method, deep eutectic solvents synthesized by 1-dodecanol and hexyltrimethylammonium bromide were applied as extraction solvent. A magnetic effervescent tablet, containing a foaming agent and a new magnetic material, combined the dispersion of the extraction solvent and the magnetic recovery into one step. The influence of parameters, including the composition and volume of DESs, the type and amount of acid, the amount of sodium bicarbonate, the composition and amount of Fe 3 O 4 @ porous activated carbon, the pH, and the amount of sodium chloride, were optimized. Under the optimized conditions, accuracy and precision were demonstrated over the whole concentration range of 10–1000 μg L -1 . The extraction recovery ranged from 81.0 to 94.7% with a relative standard deviation of 1.2–6.7%, and the LOD and LOQ ranged from 0.82 to 1.7 μg L -1 and 2.7–5.5 μg L -1 , respectively. The method was successfully applied to extract and analyse the phenolic endocrine disrupting chemicals in environmental water.
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LWT-FOOD SCIENCE AND TECHNOLOGY
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2020
·
IF 4.006
Nuo Duan,Shuo Qi,Yucong Guo,Wei Xu,Shijia Wu,Zhouping Wang
Clenbuterol hydrochloride (CLB), a kind of β-agonist, has been illegally used as a feed additive for growth promotion in the food industry in many countries. Herein, surface-enhanced Raman scattering (SERS) combined with aptamer recognition was used for the ultrasensitive and quantitative detection of CLB. Fe 3 O 4 @ [email protected] nanoparticles displaying strong SERS enhancement were synthesized and used as the active substrate. Aptamer against CLB was immobilized on the surface of the substrate to form the capture probe. The complementary DNA (cDNA) was linked to gold nanoparticles (AuNPs) carrying the Raman reporter 4-mercaptobenzoic acid (4-MBA) to form the signal probe. The detection of CLB was carried out by competitive binding between free CLB and cDNA linked on the signal probe with the aptamer immobilized on the capture probe. The SERS intensity was significantly improved by the coupling effect between the Fe 3 O 4 @ [email protected] and AuNPs, resulting in high sensitivity for the quantification assays with a limit of detection of 0.003 ng mL −1 . The recoveries of the CLB from spiked pork samples were 90.7–108.0% and the coefficients of variation (CV%) were 2.2–3.1%, demonstrating the high precision and accuracy of the assay.
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JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Yating Yan,Huayu Zhang,Wei Wang,Wenchao Li,Yueping Ren,Xiufen Li
Developing highly efficient, reusable, non-toxic and low-cost catalysts is of great importance for persulfate-based advanced oxidation processes (AOPs). In this work, ferrocene was mixed into paraffin to prepare a candle, and the iron-containing candle soots were collected and heated at 500 °C~900 °C under N 2 atmosphere for 1 h to prepare magnetically recyclable Fe 0 /Fe 3 O 4 @porous carbon (Fe 0 /Fe 3 O 4 @PC) catalysts. The Fe 0 /Fe 3 O 4 @PC-700 obtained after pyrolysis at 700 °C exhibited the best catalytic activity for sulfamethoxazole (SMX) degradation. 10 mg/L SMX could be completely degraded within 10 min by 0.2 g/L of Fe 0 /Fe 3 O 4 @PC-700 and 0.5 mM PMS at pH 5.0. The carbon shell effectively inhibited the Fe leaching of Fe 0 /Fe 3 O 4 @PC-700, and 99.73% of Fe was retained after five consecutive cycles. In the Fe 0 /Fe 3 O 4 @PC-700/PMS system, SMX was degraded through the sulfate radical (SO 4 · ¯ ), hydroxyl radical (·OH), superoxide radical (O 2 · ¯ ) dominated radical pathway, and the singlet oxygen ( 1 O 2 ) dominated non-radical pathway. The coexisting inorganic ions and natural organic matters (NOM) in actual water inhibited the degradation of SMX. Finally, four possible degradation pathways were proposed based on the degradation intermediates of SMX. This work provides a facile heat treatment of iron-containing candle soots strategy to prepare the metal@carbon catalysts for PMS-based AOP.
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危险品化学品经营许可证（带存储）