Inorganics
·
2023
·Vol. 11
·期 4
·143
·
IF 2.9
Xingtian Chen,Shumin Du,Ruoyu Hong,Huaiyin Chen
The hydrophobic nanocomposites of reduced graphene oxide (RGO) and Fe3O4(RGO/Fe3O4) were prepared by a one-pot process through co-precipitation under alkaline conditions. The microwave absorption performance of the RGO/Fe3O4nanocomposites was analyzed according to their electromagnetic parameters. The results showed that the RGO/Fe3O4nanocomposites displayed better absorbing performance than the pristine Fe3O4nanoparticles, owing to the synergistic effect of Fe3O4and RGO. The maximum reflection loss (RL) of the RGO/Fe3O4nanocomposites with a thickness of 2 mm reached −45.7 dB at 13.3 GHz, and the bandwidth (RL < −10 dB) ranged from 11.5 to 16.5 GHz. However, the maximum RL of the Fe3O4nanoparticles with a thickness of 5 mm only reached −5.3 dB at 5.7 GHz. The RGO/Fe3O4nanocomposites have a great potential application in high-performance electromagnetic microwave absorbing.Keywords:reduced graphene oxide;ferroferric oxide;co-precipitation;hydrophobicity;electromagnetic properties
研究领域:
材料科学
·
电磁学
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DOI
高影响因子
MATERIALS LETTERS
·
2013
·
IF 2.224
Kejie Yu,Xuebin Zhang,Hongwu Tong,Xiangyan Yan,Shaomin Liu
Fibrous monodisperse core–shell structured Fe 3 O 4 /SiO 2 /KCC-1 nanoparticles were synthesised successfully through a surfactant-templated microemulsion formation process. The structure and morphology of the synthesised nanoparticles were investigated by scanning electron microscopy , transmission electron microscopy , superconducting quantum interference device susceptometer, X-ray diffraction, thermogravimetric analysis and N 2 adsorption/desorption. These nanoparticles showed monodisperse spherical morphology, high magnetism , good thermal stability , large surface area , direct channels, easily accessible large pores and narrow size distribution. A mechanism for the synthesis of these nanoparticles was proposed and explained. Adsorption experiments indicated that the as-prepared materials had good adsorption capacity for dye and could perform a fast transfer of molecules, indicating its promising application in purification of industrial wastewater, drug delivery and so on.
研究领域:
纳米医学
·
材料科学
·
环境工程
·
生物材料
·
药剂学
·
胶体与界面化学
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DOI
高影响因子
CHEMOSPHERE
·
2020
·
IF 5.778
Shoufeng Tang,Mengzhen Zhao,Deling Yuan,Xue Li,Zetao Wang,Xiaoyu Zhang,Tifeng Jiao,Jun Ke
In this work, Fe 3 O 4 nanoparticle employed as the three-dimensional electrode, were introduced into the electro-oxidation system with peroxydisulfate to improve the tetracycline (TC) degradation. The coprecipitation method prepared Fe 3 O 4 was proved to be the irregular sphere-like form through the characterizations of XRD , SEM, N 2 adsorption isotherms , and XPS . By the contrast experiments, the EO-Fe 3 O 4 -PDS exhibited the outstanding TC degradation capability, which achieved 86.53% after 60 min treatment with current intensity of 20 mA cm −2 , Fe 3 O 4 dose of 0.2 g L −1 , PDS amount of 2 mmol L −1 , initial pH 4.5, and TC concentration of 25 mg L −1 . Besides, the influence of current intensity, Fe 3 O 4 dosage, PDS concentration, and beginning pH on the TC degradation was investigated systemically. The consecutive five recycles of Fe 3 O 4 demonstrated that a favorable stability for the coupling process. The EO-Fe 3 O 4 -PDS could improve the PDS decomposition and H 2 O 2 production. The sulfate and hydroxyl radicals both took charge of the antibiotic degradation as certified by scavenger test. The TC degradation evolution was presented based on the HPLC-MS analyses of degradation byproducts.
研究领域:
环境科学
·
化学工程
·
高级氧化技术
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纳米材料
·
水处理
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DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2026
·
IF 5.9
Xiangyu Zhang,Panyue Liu,Wangping Duan,Pengcui Li,Weiyi Chen,Xiaochun Wei
Bacterial infections significantly delay the healing of skin wounds, while the overuse of antibiotics has led to increasing pathogen resistance, further complicating the treatment of skin lesions. Photodynamic therapy has garnered significant attention due to its convenient, controllable antimicrobial properties and low risk of inducing drug resistance. However, traditional metal porphyrin photosensitizers suffer from issues such as rapid recombination of photogenerated charge carriers and insufficient reactive oxygen species (ROS) generation, severely limiting their clinical application in light-controlled antimicrobial therapy. This study synthesized ferrosoferric oxide/Zn-doped porphyrin heterojunction composites (Fe 3 O 4 /ZnTCPP) via a two-step hydrothermal method. ZnTCPP, acting as a photosensitizer, generates electrons upon excitation by 808 nm near-infrared (NIR) light, while Fe 3 O 4 serves as both an electron acceptor and a photothermal component. Electrochemical testing indicates that the heterointerface formed between Fe 3 O 4 and ZnTCPP significantly enhances the separation efficiency of photogenerated charges. Under NIR irradiation, the Fe 3 O 4 /ZnTCPP composite exhibits enhanced ROS generation capacity and superior photothermal effects compared to individual components. In vitro antibacterial testing indicates that Fe 3 O 4 /ZnTCPP composite achieves a 99.99 % kill rate against Staphylococcus aureus after just 10 min of 808 nm NIR irradiation. Additionally, this composite material accelerates skin tissue regeneration while effectively reducing inflammation levels in infected wounds, maintaining outstanding biocompatibility throughout. This study confirms that the constructed Fe 3 O 4 /ZnTCPP heterojunction successfully integrates near-infrared responsiveness, photodynamic therapy, and photothermal therapy into a single platform, providing an innovative material design solution for treating bacterial wound infections.
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Xiao-Jun Feng,Xiao He,Lu Lai,Qingye Lu,Li Cheng,Juan Wu
Environmentally friendly and cost-efficient recyclable demulsifiers are critical for dewatering of water-in-oil (W/O) emulsions. Here, a novel facile synthesis of magnetic-recyclable demulsifiers is reported. Three kinds of commercial polyether demulsifiers (AE1910, SP169, and AR321) are used and anchored onto Fe 3 O 4 nanoparticle surfaces using mussel-inspired polydopamine as an adhesive. Infrared spectra, transmission electron microscopy imaging, dynamic light scattering, thermogravimetric analysis, and X-ray diffraction are employed. The results confirm successful polydopamine coating on nanoparticle surfaces (Fe 3 O 4 @PDA) and follow the binding of polyether demulsifiers (Fe 3 O 4 @ [email protected] ). A water contact angle of 91.3° measured on Fe 3 O 4 @ [email protected] indicates particle amphiphilicity for promising interfacial activity. A low interfacial tension (∼1.0 mN⋅ m −1 ) and a rapid adsorptive behavior are observed for the oil-water interface with the presence of Fe 3 O 4 @ [email protected] The three kinds of nanoparticles report high demulsification efficiency of 98.00 %, 91.63 %, and 94.33 % for crude oil emulsions. They also record 98.25 %, 90.27 %, and 98.66 % for water/n-decane emulsions for Fe 3 O 4 @ [email protected] , Fe 3 O 4 @ [email protected] , and Fe 3 O 4 @ [email protected] , respectively. These nanoparticles can be magnetically recovered and reused. As high as 77.81 % remaining demulsification efficiency is reached after eight cycles of treating water/n-decane emulsion and three cycles of treating crude oil emulsions by using Fe 3 O 4 @ [email protected] The findings indicate a promising application of polydopamine-coated Fe 3 O 4 nanoparticle to prepare various magnetic recyclable nanoparticle demulsifiers in dewatering of W/O emulsions. Compared with previous reports, the synthetic process is simple, and the synthetic condition is temperate and environmentally friendly, which may advance the application of recyclable nano-demulsifiers in the oil field.
研究领域:
化学
·
材料科学
·
环境科学
·
工程学
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DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2020
·
IF 5.88
Peng-Yue Hu,Ying-Tao Zhao,Jun Zhang,Shu-Xin Yu,Jia-Shu Yan,Xiao-Xiong Wang,Mao-Zhi Hu,Hong-Fei Xiang,Yun-Ze Long
Magnetic fibrous membrane used to generate heat under the alternating magnetic field (AMF) has attracted wide attention due to their application in magnetic hyperthermia. However, there is not magnetic fibrous membrane prepared by melt electrospinning (e-spinning) which is a solvent-free, bio-friendly technology. In this work, polycaprolactone (PCL)/Fe 3 O 4 fiber membrane was prepared by melt e-spinning and using homemade self-powered portable melt e-spinning apparatus. The hand-held melt e-spinning apparatus has a weight of about 450 g and a precise size of 24 cm in length, 6 cm in thickness and 13 cm in height, which is more portable for widely using in the medical field. The PCL/Fe 3 O 4 composite fibers with diameters of 4–17 μm, are very uniform. In addition, the magnetic composite fiber membrane has excellent heating efficiency and thermal cycling characteristics. The results indicated that self-powered portable melt e-spinning apparatus and PCL/Fe 3 O 4 fiber membrane may provide an attractive way for hyperthermia therapy.
研究领域:
材料科学
·
生物医学工程
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DOI
高影响因子
GEOFLUIDS
·
2022
·
IF 2.006
Teng Lu,Faqiang Dang,Haitao Wang,Qingmin Zhao,Zhengxiao Xu
Nanoparticle-assisted microwave heating of heavy oil has the advantages of fast temperature rise and high thermal efficiency. Compared with traditional heating methods, it can reduce viscosity in a shorter time. In addition, the heavy components in the heavy oil are cracked into light components at high temperatures (this high temperature cannot be reached by conventional heating methods). This process is irreversible and avoids the problem of viscosity recovery of heavy oil after the temperature is reduced. Through absorbing microwave heating experiments, study the effect of nanoparticles on the improvement of the ability of heavy oil to absorb waves and raise temperature; through the heavy oil upgrading experiment and the four-component analysis experiment, the effect of adding hydrogen donor to assist microwave on the viscosity reduction of heavy oil upgrading by nanoparticles was studied, and the problem of viscosity recovery was determined; Through the gravity drainage experiment, the mechanism of nanoparticle-assisted microwave to improve the recovery of heavy oil is studied, and the influence of water content, nanocatalyst, and microwave power on the production of drainage is analyzed. The results show that nanoparticles can improve the wave absorption and heating capacity of heavy oil, and adding 0.6 wt% of nanomagnetic iron oxide catalyst can increase the heating rate of heavy oil in microwave by 60.6%; nanoparticle-assisted microwave heating method can effectively upgrade heavy oil and reduce viscosity. The experimental conditions are 2 wt% tetralin mass concentration, 0.5 wt% nano-Fe3O4 particle mass concentration, microwave heating time 50-60 min, and microwave power 539 W. Under this experimental condition, the viscosity is reduced by 40%. This method has viscosity recovery problems, but final viscosity reduction effect is still very significant. Obtaining the mechanism of nanoparticle-assisted microwave to enhance oil recovery, one of which is that nanoparticles improve the wave absorption and heating capacity of heavy oil and increase the heating speed of heavy oil; the second is that the nanoparticles form local high temperature under the action of microwave, which catalyzes the hydrocracking reaction between the heavy components in the heavy oil and the hydrogen donor, upgrading and reducing the viscosity of the heavy oil, and accelerating the production of heavy oil.
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产品关联
DOI
高影响因子
ACS Applied Bio Materials
·
2022
·
IF 0
Xiangrong Tian,Li Ruan,Shengwang Zhou,Lin Wu,Jin Cao,Xueyong Qi,Xin Zhang,Song Shen
Iron oxide nanoparticles can induce cell death due to the ferroptosis mechanism, showing a great potential for cancer therapy. Here, we synthesized different-sized iron oxide nanoparticles (2–100 nm) to investigate their antitumor effect and toxicity mechanism. It was found that ultrasmall nanoparticles (< ∼5 nm) could accumulate in nucleus and were more efficient in triggering the generation of •OH than larger nanoparticles due to the quicker release of Fe2+, thus exhibiting more remarkable cytotoxicity. Nevertheless, 10 nm iron oxide nanoparticles group displayed the best antitumor effect in vivo. We studied the in vivo and intratumoral biodistribution of the nanoparticles and found that the therapeutic effects were related to both the tumoral accumulation and intratumoral distribution of nanoparticles. This work indicates the appropriate size of Fe3O4 NPs for cancer treatment and illustrates the possible factors that influence the therapeutic effect, suggesting the great potential of iron oxide in clinical application.
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产品关联
DOI
PubMed
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Xian Li,Pingying Liu,Jumei Li
In this study, a facile and efficient approach was proposed for fabricating magnetically separable core-shell structured nanocomposites consisting of a magnetic Fe 3 O 4 core, a mesoporous ZrO 2 (mZrO 2 ) interlayer and an outer Ag nanoparticles shell using a sol-gel process and a wet chemistry method at ambient condition, and the hydrothermal treatment . The resulting Fe 3 O 4 /mZrO 2 /Ag nanocomposites were analyzed by TEM and SEM images, XPS , EDX and XRD spectra. Their photocatalytic activity was examined for the degradation of methylene blue under UV light . The effect of initial concentration, catalyst dosage and pH value was investigated and the results were discussed. Fe 3 O 4 /mZrO 2 /Ag nanocomposites showed higher photocatalytic activity, compared with Fe 3 O 4 /mZrO 2 composites. The PL analysis revealed Fe 3 O 4 /mZrO 2 composites possessed the enhanced separation efficiency of electron-hole pairs in comparison with Fe 3 O 4 /mZrO 2 . Moreover, the Fe 3 O 4 /mZrO 2 /Ag nanocomposites can be easily separated and recycled with an external magnetic field, and so they present remarkable reusability.
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 19
·15754-15762
·
IF 2.779
Zhang Ting,Chu Xueying,Jin Fangjun,Xu Mingze,Zhai Yingjiao,Li Jinhua
Sensors for rapid and reliable detection of biomolecules are crucial for clinical medical diagnoses. Here, a rapid, ultra-sensitive, magnetic-assisted biosensor based on resonance Raman scattering at MoS 2 @Fe 3 O 4 composite nanoflowers is presented. Raman shifts and X-ray photoelectron spectra indicated that the composite was formed via Fe–S covalent bonds. Convenient magnetic separations could be performed because of the superparamagnetic Fe 3 O 4 nanoparticles. MoS 2 E 1 2g and A 1g Raman peaks were used as probe signals for anti-interference immunoassays. The probe unit of the immunoassay also included goat anti-human IgG molecules that were used as the target analyte. Au substrates coupled with the goat anti-human IgG were used as capture units to form sandwich biosensors. Because of the magnetic enrichment, the detection limit was improved by three orders-of-magnitude and the detection time was reduced from 1.5 h to 1 min. Sandwich biosensors using MoS 2 @Fe 3 O 4 nanoflowers as Raman probes could be very promising sensors for proteins, antigens, and other immunogenic biopolymers, as well as for corpuscular viruses and cells.
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产品关联
DOI
PubMed
高影响因子
Journal of Materiomics
·
2022
·
IF 8.589
Li Wang,Zhang Chen,Xue Wang,Liying Zhang,Zongtao Zhang,Qi Zhao,Yanfeng Gao
Low-frequency microwave absorbing materials have been challenging for many years. Three-dimensional dielectric/magnetic porous materials are beneficial for improving the low-frequency microwave absorbing performance because of natural resonance and improved impedance matching. In this study, Fe 3 O 4 @C 3D foam was prepared by carbothermal reduction method and the microwave attenuation performances and mechanisms were studied. By adjusting the content of Fe 3 O 4 @C 3D foam in paraffin composites, the low-frequency microwave attenuation capacity could be effectively optimized. The minimum reflection loss (RL min ) of paraffin composite with 40% (in mass fraction) loading exhibits −54.7 dB at 4.1 GHz for a thickness of 4.0 mm. Surprisingly, the paraffin composite with 50% (in mass fraction) loading could almost cover 2–4 GHz (S-band) in the thickness range of 3.5–5.5 mm. The strong low-frequency microwave attenuation property of Fe 3 O 4 @C 3D foam is mainly attributed to excellent low-frequency impedance matching, natural resonance, interfacial/dipole polarization, multiple reflection and scattering. This method provides a new perspective for preparing lightweight and high performance low-frequency microwave absorbing materials.
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DOI
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Baoding Li,Zhihui Zeng,Jing Qiao,Yunfei Yang,Dongmei Xu,Haoyuan Tian,Wei Liu,Jiurong Liu
A type of hollow core–shell ZnO/Fe3O4@C fibers were fabricated by a facile combination of electrospinning, calcination, and pyrolytic pyrrole-derived carbon coating. The combination of ZnO/Fe3O4 fibers and carbon nanolayer improved the dielectric loss capability of the nanocomposites and obtained good impedance matching, leading to excellent electromagnetic wave (EMW) absorption performance. The minimum reflection loss of the ZnO/Fe3O4@C nanocomposites reached −74.2 dB at a thickness of merely 2.2 mm, and the effective absorption bandwidth reached 5.5 GHz at a matching thickness of 2.1 mm. Compared with the ZnO- or Fe3O4-based composites ever reported, our ZnO/Fe3O4@C nanocomposites exhibited superior EMW absorption characteristics due to the efficient design of multiple synergistical components and hollow fibrous structures. Combined with the facile, scalable preparation approach, the hollow core–shell ZnO/Fe3O4@C nanocomposite fibers with high EMW absorption performance show great potential for EMW absorption applications.
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高影响因子
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