CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
·
2024
·
IF 1.2
Qinghua YANG,Zhimin HE,Yilan SHI,Jinxin WANG,Qianying QIU,Honghai DENG,Wenhui PING
In this study, a new technique was developed which combines magnetic solid phase extraction (MSPE) and gas chromatography-mass spectrometer (GC–MS), for the analysis of 17 phthalate esters (PAEs). First, a composite of iron (used as the magnetic part) and graphene oxide (GO) was synthesized for application in MSPE. Scanning electron microscop, X-ray diffraction and infrared spectroscopy were used to characterize this material. Finally, magnetic graphene oxide (Fe₃O₄@GO) was used to extract PAEs from water samples. Various parameters relevant to the extraction were optimized, such as the amount of adsorbent employed, adsorption time, luent solvent types and volume, and sample pH. These optimum conditions resulted in calibration curves for the 17 PAEs, showing linear relationships between concentration and response at concentrations of 25 to 2500 µg L⁻¹ with correlation coefficients from 0.9983 to 1.000. Limit of detection and limit of quantitationfor the PAEs ranged from 0.030 to 0.12 µg L⁻¹ and 0.10–0.40 µg L⁻¹, respectively. The recovery rates for these compounds in spiked samples were ranging from 81.5% to 109% with relative standard deviation less than 6.12%. The effectiveness of method was further demonstrated by its use in detecting 17 PAEs in samples of drinking and bottled water. Compounds such as DEP, DIBP, DBP, and DCHP were identified. These results thus highlight the suitability of Fe₃O₄@GO as an adsorbent for concentrating and purifying PAEs in water samples.
研究领域:
环境科学
·
分析化学
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高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Jiasen Zhang,Lin Zhang,Xufei Liu,Bokun Jia,Kai Xie
To mitigate the environmental pressures associated with waste management, it is crucial to adopt scientific and rational approaches to solid waste treatment. This study introduces a novel gravity-driven membrane (GDM) that utilizes industrial solid waste as its structural framework, significantly enhancing algae removal efficiency. The industrial solid wastes examined include bayer red mud (BRM), sintered red mud (SRM), fly ash (FA), and gangue (GA). Notably, the adsorption energy (E ads ) of modified iron atoms on BRM was found to be −0.532 eV, indicating robust interaction forces. The adsorption efficiency of the GDM is primarily governed by the Lewis acid-base interactions ( Δ U fwm AB ). Further analysis combining interaction energy with fluorescence characteristics demonstrates the effectiveness of the Fe–O network in BRM at extracting tryptophan protein-like substances from the membrane pores. The algae removal efficiency of the GDM incorporating BRM reached 66.71 %, suggesting a promising application for filtering algal-rich waters at the molecular level within ceramic matrices.
研究领域:
环境科学
·
材料科学
·
水处理技术
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高影响因子
INTEGRATED FERROELECTRICS
·
2018
·
IF 0.367
Xiaolei Song,Yuan Yu,Chunxia Wang,Mingqiao Ge
Magnetic nanoparticles of Nd-Fe3O4 were prepared by hydrothermal synthesis method, using NdCl3·6H2O and FeCl3·6H2O as the starting materials in this paper. The structure and morphology of nanoparticles were investigated by XRD, FTIR, EDS and TEM. The results showed that, while the addition of Nd at 10% in mole ratio, resulted in the formation of Nd2O3 crystal peak in cubic Fe3O4 nanocrystallites by XRD. The absorption bands of Fe‒O, ‒OH, ‒O‒C‒O‒ and ‒CH2‒ were accordant to the correspondent chemical groups by FTIR. The morphology of the prepared nanoparticles exhibited spherical structure and evenly distributed without agglomeration phenomenon by TEM. The elemental composition were mainly consistent with the precursor materials used in the experiment.
研究领域:
材料科学
·
纳米技术
·
化学
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DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2026
·
IF 5.9
Xuan Shang,Mingyue He,Huiying Jiang,Fangying Jiang,Deping Wang,Jimin Cao,Yan Tan,Jigen Li,Yanlin Feng,Xin Zhou
Cancer remains a global health challenge, calling for integrated strategies that combine precise diagnosis with synergistic treatment. Although glucose oxidase (GOx)-mediated starvation therapy disrupts tumor metabolism by converting glucose into cytotoxic hydrogen peroxide (H 2 O 2 ), its clinical translation is hindered by inefficient delivery and insufficient monotherapy efficacy. To address these issues, we developed a multifunctional nanoplatform by encapsulating GOx within hollow porous superparamagnetic Fe 3 O 4 nanoparticles (Fe 3 O 4 -GOx NPs) to preserve its catalytic activity and enable high loading capacity. This system simultaneously enables magnetic resonance imaging (MRI), photothermal therapy, and enzyme-mediated catalytic intervention. In vitro studies demonstrated strong T 2 -weighted MRI contrast for precise tumor localization, together with near-infrared laser-triggered hyperthermia that enhance the efficacy of GOx-mediated starvation therapy, elevating oxidative stress and promoting apoptosis in 4T1 cells. In 4T1 tumor-bearing mice, a single administration of Fe 3 O 4 -GOx NPs combined with laser irradiation elicited potent tumor suppression through the synergistic effects of intratumoral ROS generation, glucose depletion, and localized photothermal ablation, outperforming either modality alone. Histopathological assessment revealed negligible systemic toxicity and preserved organ integrity. This work presents an integrated theranostic nanoplatform that unites tumor-targeted imaging, enzyme- driven metabolism intervention, and photothermal therapy into a single system, offering a promising strategy for precision cancer management.
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DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Ji-Ying Song,Lei Pan,Fu-Hao Zhang,Xin-Yun Song,Qi Wu
The residues of tetracycline antibiotics (TCs) in aquatic environments have led to pressing environmental issues, necessitating the development of efficient removal technologies. In this study, we constructed an adsorption-degradation synergistic system based on Fe₃O₄ nanoparticles/graphene oxide/layered double hydroxides (Fe₃O₄/GO/LDHs) for the removal of TCs from water. This Fe₃O₄/GO/LDHs composite ingeniously combines the adsorption advantages of both GO and LDHs: GO serves as a growth substrate for LDHs, effectively preventing the LDHs from agglomerating into bulk masses, while LDHs also inhibit the interlayer stacking of GO. This leads to enhanced specific surface area of up to 581.7 m 2 /g, establishing a robust structural foundation for efficient adsorption. The incorporation of Fe₃O₄ nanoparticles not only endows the material with excellent magnetism for convenient magnetic separation and recovery but also utilizes its peroxidase-like activity to achieve catalytic degradation. The equilibrium adsorption capacities of Fe₃O₄/GO/LDHs for tetracycline, oxytetracycline, and chlortetracycline reached 676.5 mg/g, 814.1 mg/g, and 808.1 mg/g, respectively, primarily driven by electrostatic, π-π and complexation interactions. In the presence of H₂O₂, Fe₃O₄/GO/LDHs activating H₂O₂ to generate reactive oxygen species, achieving over 90% degradation rate within 1 h, demonstrating strong catalytic capability. Integrating adsorption with in-situ degradation, Fe₃O₄/GO/LDHs functions as a network of micro-reactor factories, rapidly concentrating pollutants at catalytic active sites and creating a high-local-concentration microenvironment that dramatically accelerates catalytic reactions, thereby enhancing overall degradation efficiency. This study advances the development of adsorption-degradation bifunctional nanozymes for water purification.
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IEEE SENSORS JOURNAL
·
2024
·Vol. 24
·期 22
·36239-36246
·
IF 4.3
Dong Zhao,Honglie Chen,Kun Yang,Haoyu Wang,Xing Guo,Yang Ge,Xiushan Dong,Shengbo Sang
The application of competitive immunoassay brings many advantages to the detection of trace biomolecules and has the potential to be applied to urine-based clinical practice. However, this type of detection method has strict requirements for secondary antibody incubation processes and analysis equipment, leading to strong demands for convenient, rapid, and inexpensive detection platforms. In this study, a mechanical competitive immunosensor (MCI) was proposed for the detection of human serum albumin (HSA) based on goat anti-rabbit @Fe2O3 magnetic beads with magnetic sensitization. With the doping of Fe2O3, the conversion layer of MCI responds more accurately and rapidly to stress. In addition, goat anti-rabbit conjugated with animated Fe2O3 nanoparticles were introduced as secondary antibodies for signal amplification. Under the synergistic effect of the magnetic force of magnetic beads and the stress caused by the specific binding of antigen and antibody, the deformation of the film was amplified, which can effectively change the conductive pathway formed by doped carbon nanotubes, resulting in a larger output electric signal. Through competitive immunoassay for HSA, a limit of detection (LOD) of 68 ng/mL was achieved, which was an order of magnitude lower than direct detection methods. With high reproducibility and stability, MCI demonstrated effectiveness in the detection of HSA at a clinically significant concentration range (0.1–
$50 \; \mu $
g/mL). Moreover, MCI showed excellent specificity and selectivity, which held promise to offer an alternative tool for clinical diagnosis of urine HSA levels in nephrotic patients.
研究领域:
生物医学工程
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分析化学
·
纳米技术
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DOI
高影响因子
Journal of Cleaner Production
·
2025
·
IF 10
Wenxing Jin,Jun Nan,Hua Chai,Meng Chen,Zonghua Wang,Jinjin Jia,Langrun Song,Fangmin Wu,Bohan Liu
This study developed novel polyferric titanium chlorides (PFTC) with varying Fe/Ti ratios and basicity (B) to achieve safe and effective surface water treatment. The formation of Fe-O-Ti was confirmed through the characterization of PFTC and its impact on physicochemical properties and coagulation performance was thoroughly investigated. Additionally, the molecular-level coagulation mechanism was elucidated. The results demonstrated that PFTC exhibited remarkable stability, with a distinct pH-stable phase during alkaline titration. PFTC showed excellent bridging adsorption capacity, achieving bovine serum albumin (BSA) removal efficiency of 78.33%. The flocculation rate increased to more than 222%, producing larger, denser flocs with superior settling performance, while posing no environmental risks to treated water. XPS and FTIR analyses revealed that hydrogen bond was the primary mechanism driving bridging adsorption. Molecular docking analysis indicated that PFTC hydrolysates formed stronger hydrogen bonds with higher binding energy at key BSA residues compared to polyferric chloride (PFC). According to XDLVO theory, the dominant hydrogen bond range between PFTC and BSA was more than 2.75 times greater than that of PFC and BSA. The hydrogen bond domain expansion effect, coupled with robust hydrogen bond, overcame distance barriers, enabling PFTC to establish strong bridging adsorption interactions with a broader range of BSA molecules, thereby enhancing coagulation efficiency. This study provides valuable insights into the interaction mechanisms between PFTC and BSA, supporting the practical application of polymeric metal composite coagulants.
研究领域:
环境科学
·
化学工程
·
水处理技术
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DOI
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Yongzhi Tu,Ziming Zhang,Peien Huang,Jiale Zou,Zhi Xiong,Meiting Zheng,Zhifei Ma,Jianxin Chen
Unlike conventional Fe₃O₄-MnO₂ composites, an architecture-engineered Fe₃O₄-MnO₂ (FM-21) heterostructure was constructed by anchoring Fe₃O₄ nanoparticles onto α-MnO₂ nanorods. Under visible light irradiation, the FM-21/PDS system achieves 96.5 % Orange II degradation within 60 min with a kinetic rate constant of 0.0596 min −1 , significantly outperforming its individual components and dark condition controls. Multiple characterization techniques confirm that the unique interfacial configuration establishes a direct Z-scheme charge transfer pathway, substantially enhancing charge carrier separation efficiency. XPS analysis provides direct evidence that visible light accelerates the co-cycling of Fe 3+ /Fe 2+ and Mn 4+ /Mn 3+ redox pairs, thereby maintaining highly efficient PDS activation. Quenching experiments and EPR analysis further reveal that the synergistic effect between radical and non-radical pathways, which is dominated by singlet oxygen ( 1 O₂) and holes (h + ), drives the degradation process. This mechanism enables the degradation of various pollutants with minimal dependence on their charge characteristics, demonstrating the catalyst's broad applicability. The catalyst also exhibits practical advantages including magnetic separability and stable performance over five consecutive cycles. This study demonstrates that the synthesized FM-21 exhibits significant potential for visible light-enhanced PDS activation in eliminating recalcitrant organic pollutants.
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高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Kai Xu,Pei Liu,Yinxu Ni,Qingqing Gao,Jin Chen,Shuai Yin,Zixuan Ding,Guohui Tang,Changtian Zhu,Fenghua Liu
Electromagnetic (EM) pollution has emerged as a pressing concern, driving the demand for high-performance microwave absorbing materials. In this work, attapulgite (ATP) was employed as a natural, porous scaffold for the in situ integration of amorphous TiO2, Fe3O4, and polyaniline (PANI), constructing a multifunctional composite with tailored dielectric and magnetic properties. The TiO2 and PANI coatings not only induced strong interfacial and conduction polarization but also formed a continuous 3D conductive network, enabling efficient energy dissipation. Benefiting from the magneto-electric synergy among PANI, TiO2, and Fe3O4, the composite exhibited multiple loss mechanisms and excellent impedance matching. As a result, a minimum reflection loss of -56.24 dB was achieved at 11.63 GHz (2.9 mm thickness), with an ultra-wide effective absorption bandwidth of 8.1 GHz. More importantly, by integrating 3D printing with metamaterial-inspired design, the absorption range was successfully extended into the low-frequency region (4–6 GHz), while simultaneously enhancing structural integrity and corrosion resistance. This study offers a scalable strategy for designing lightweight, corrosion-resistant microwave absorbers by combining hierarchical conductive frameworks with multifunctional components, opening new avenues for next-generation EM shielding and stealth technologies.
研究领域:
材料科学
·
电磁工程
·
纳米技术
·
复合材料
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腐蚀科学
·
微波技术
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2026
·Vol. 61
·期 14
·9219-9229
·
IF 4.4
Zhao Mo,Wu Wei,Chen Wei,Dong Yayun,Yang Jing,Shi Yuewu,Li Jinxi,Wang Wenbing,Zhou Yifu,Wang Xutong
The magnetostriction effect of ferrite materials will adversely affect their application in high-precision electrical measurement scenarios. In this study, vanadium pentoxide (V 2 O 5 ) was introduced as both a sintering aid and a dopant in the solid-state sintering process of iron-deficient NiCuZn ferrites with the composition (Ni₀.₂Cu₀.₂Zn₀.₆O)₁.₀₃(Fe₂O₃)₀.₉₇. The results show that the addition of V₂O₅ effectively promots grain growth, increasing the average grain size from approximately 1 μm to 6 μm, and enhances the compactness of the material, which would compensate the magnetization reduction due to the replacement of Fe 3+ by V 5+ . When the doping concentration of V 5+ is controlled below 3 at%, the magnetostriction strain of the ferrite can by minimized to approximately 8 ppm without significant loss of key magnetic properties such as permeability and saturation magnetization. In addition, vanadium doping also improved electrical resistivity of NiCuZn ferrite, thereby reducing eddy current losses and power loss of material under high-frequency (50 kHz and 100 kHz) electromagnetic fields, which make the V 5 ⁺ doped NiCuZn ferrites possibly be used in the high-precision and high frequency measurement.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2016
·Vol. 27
·期 3
·1605011
·
IF 11.382
Yaxiong Yang,Yongfeng Liu,Kaichao Pu,Xing Chen,He Tian,Mingxia Gao,Min Zhu,Hongge Pan
In this study, an amorphous Li 2 CO 3 -coated nanocrystalline α-Fe 2 O 3 hierarchical structure is synthesized for the first time using a facile one-step mechanochemical process at room temperature, taking advantage of the concurrence of repeated fracture-cold welding of material's particles and a gas-solid redox reaction. The conformal coating and hierarchical structure significantly increase the cycling durability and rate capability. Typically, a 1–3 nm thick amorphous Li 2 CO 3 layer is conformally coated on Fe 2 O 3 nanocrystallines (≈10 nm in size) that form hierarchically aggregated particles 400–800 nm in size by ball milling α-Fe 2 O 3 with LiH in CO 2 . The prepared Li 2 CO 3 -coated nanocrystalline α-Fe 2 O 3 exhibits highly stable long-term cyclability as it delivers a reversible capacity of 975 mAh g −1 with 99% of retention after 400 cycles at 100 mA g −1 . At a high rate of 3000 mA g −1 , its reversible capacity still remains at 537 mAh g −1 , superior to the uncoated counterpart (311 mAh g −1 ). Moreover, amorphous Li 2 O and Li 2 CO 3 coatings are also similarly produced on Fe 2 O 3 and NiO nanocrystallines, respectively, representing the general applicability of this mechanochemical approach.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
固态化学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 31
·1-22
·
IF 2.8
Guo Yiting,Hao Jingyi,Wang Tian,Su Shen,Yang Shuangshuang,Wang Xingwei,Yu Qiangliang
To investigate the electromagnetic wave absorption performance of electromagnetic-regulated materials and copolymerized composite aerogels with polymer materials, this study loaded nano-Fe 3 O 4 onto modified CNTs through a hydrothermal reaction. The resulting material was then added to a prepolymer solution of acrylic acid and acrylamide monomers for copolymerization, followed by the preparation of composite aerogels using freeze-drying technology (Fe 3 O 4 -CNTs/P(AA-AM)). The influence of the addition amount of nano-Fe 3 O 4 -loaded modified CNTs on the electromagnetic wave absorption performance of the composite aerogels was systematically studied. Notably, the Fe 3 O 4 -CNTs/P(AA-AM)-5 aerogel exhibited the optimal wave-absorbing performance, achieving a minimum reflection loss of −35.5 dB and an effective absorption bandwidth of 5.04 GHz below −10 dB. This is primarily attributed to the excellent dual electromagnetic loss of Fe 3 O 4 -CNTs and the multiple reflection, polarization, and relaxation processes induced by the three-dimensional conductive network constructed within the aerogel skeleton. The performance relationships revealed in this study are of significant importance for the design and preparation of polymer aerogels with effective electromagnetic wave absorption capabilities.
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高影响因子
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