LWT-FOOD SCIENCE AND TECHNOLOGY
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2024
·
IF 6
Yuanyi Wu,Yumei Xiao,Yang Ju,Yanque Sun,Jialin He,Tian Liu,Miao He,Kaiyong Wang,Yi Yang
The determination of gallic acid (GA), one of the most prevalent antioxidants in various plants, provides information for food nutrition evaluation. A novel colorimetric, fluorescent, and smartphone multi-mode GA sensing platform based on Fe 3 O 4 @Co/Ni/Al-layered double hydroxide (LDH) nanospheres was designed in this study. The core-shell magnetic Fe 3 O 4 @Co/Ni/Al-LDH nanospheres were synthesized through a simple co-precipitation approach. They showed dominate peroxidase-like activities capable of oxidizing 3,3′,5,5′-tetramethylbenzidine (TMB) into a blue colored oxidation oxTMB. Meanwhile, the generated oxTMB could quench the fluorescence of neutral red via the inner filter effect. GA acted as an inhibitor to prevent the oxidation of TMB to oxTMB and restoring the fluorescence of neutral red. Under optimized conditions, the linear ranges were 0.5–120 μmol/L with detection limits of 0.137–0.415 μmol/L. Besides, the sensor exhibited good selectivity toward GA over various interferents. Moreover, it was successfully utilized to analyze GA in tea beverages with ideal recoveries of 92.8–105%, demonstrating good reliability and stability in practical applications. This study provided Fe 3 O 4 @Co/Ni/Al-LDH nanospheres as candidate nanozymes for the construction of biosensors. The multi-mode self-checking function and the “turn on” fluorescent sensing strategy offered this sensor superior anti-interference ability, and opens up a new strategy for the determination of antioxidants in foods.
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高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Shuang Gao,Xiuyan Deng,Xiaoming Qi,Hongbo Dai,Shao-Yun Fu,Yaqin Fu
High-performance microwave absorption materials with broad electromagnetic absorption bandwidths and scalable architectures have been increasingly demanded in modern electric and telecommunications industries. Herein, we propose a flexible three-dimensional (3D) woven fabric with superior washability and electromagnetic-wave absorption capability using the nanoengineered carbon black (CB)-Fe3O4/polyamide-66 (PA-66) composite fibers that possess a unique core–sheath structure. Notably, the impedance matching and microwave attenuation of the proposed 3D fabric absorbers are realized by the dielectric–magnetic coupling effect of nanometer-sized CB and Fe3O4 nanoparticles within the constituent PA-66 fibers. The produced 3D fabrics showed superior mechanical properties with a tensile strength of 35 MPa, good softness with flexibility of drape coefficient up to 88.8%, and great air permeability with an air permeability of over 109 mm/s. At a weft density of 250 picks/10 cm, the fabric realized the best electromagnetic-wave absorption performance with a minimum reflection loss of −34.5 dB, owing to the good impedance-matched 3D orthogonal structures and integrated dielectric–magnetic fibrous networks of the 3D fabric. In particular, this performance could be well-maintained even after rinsing five times or folding to two layers. This study can provide a promising route to developing next-generation flexible electromagnetic absorption materials.
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高影响因子
RSC Advances
·
2018
·Vol. 8
·期 8
·4321-4328
·
IF 2.936
Qin Gao,Wensheng Xie,Yu Wang,Dan Wang,Zhenhu Guo,Fei Gao,Lingyun Zhao,Qiang Cai
Achieving accumulation of a target drug in tumor tissue, optimal release behavior and concurrent diagnostic imaging with therapy (theranostic) requires an ideal chemotherapy protocol that involves the responsive control of drug delivery. In the current study, we report the construction of a novel theranostic drug delivery system based on radial mesoporous silica, which is hybridized with multiscale magnetic nanoparticles for MRI-guided and alternative magnetic field (AMF) responsive chemotherapy for breast cancer. Superparamagnetic iron oxide nanoparticles (IONPs) with multiscale sizes were prepared via a hydrothermal method (for larger IONPs, lIO NPs) and a thermal decomposition method (for ultra-small IONPs, uIO NPs). lIO NPs act as the heat mediator that is responsive to the AMF, while uIO NPs act as the T2 contrast agent for MRI. Mesoporous silica nanoparticles with radially oriented mesochannels were further in situ grown onto the surfaces of the lIO NPs, and both the uIO NPs and doxorubicin, an anti-cancer drug, can be readily incorporated within the mesochannels. To endow the as-prepared doxorubicin-loaded nano-hybrids with a good targeting ability, the surfaces of the particles were modified with folic acid (FA). This prepared drug delivery system based on magnetic/silica nanocomposites showed high drug loading efficiency and AMF stimuli responsive release properties. Meanwhile, in vitro MRI measurements revealed an excellent MRI contrast effect with a high relaxation value of 308 mM−1 s−1. Furthermore, both in vitro cytotoxicity analysis and in vivo anti-tumor effect evaluation demonstrated that the drug delivery system possesses great potential as an MRI-guided stimuli-responsive theranostic platform for effective active targeting chemotherapy of cancer.
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高影响因子
RSC Advances
·
2024
·Vol. 14
·期 24
·16727-16735
·
IF 3.9
Huizhong Wu,Qiong Yi,Xiang Li,Yingxi Wang,Ling Li
Low catalytic efficiency and catalyst recovery are the key factors limiting the practical application of advanced oxidation processes. In this work, a core–shell magnetic nanostructure Fe3O4@MIL-101(Fe, Co) was prepared via a simple solvothermal method. The core–shell structure and magnetic recovery performance were characterized by various technologies. The results of dye degradation experiments proved that within 10 minutes, the Fe3O4@MIL-101(Fe, Co)/PMS system can degrade more than 95% of 10 mg per L Rhodamine (RhB) at an initial pH of 7, which possesses higher catalytic activity than the Fe3O4/PMS system and the MIL-101(Fe, Co)/PMS system. The effects of initial solution pH and coexisting anions in water on the degradation of RhB were further discussed. The results showed that Fe3O4@MIL-101(Fe, Co) displayed excellent degradation efficiency in a wide pH range of 3–11 and capability of resisting coexisting anions. It is worth mentioning that after five cycles, the RhB removal rate can still be maintained at over 90% after 10 minutes of reaction. Free radical quenching experiments were further studied, confirming that ˙OH and SO4−˙ were involved in the degradation of RhB, while the dominating active free radical was SO4−˙. The possible reaction mechanism of the RhB degradation process was also inferred.
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PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Aijuan Xie,Linghui Cao,Tianyu Shen,Yuanxinyi Zhou,Haoye Wang,Shiping Luo
As para -aminophenol (PAP) is toxic to humans, causing skin irritation, eye damage, and central nervous system depression, and it can form as a degradation product of paracetamol (PAT) under certain conditions, the simultaneous determination of PAP and PAT is crucial. This work presents the fabrication of three-dimensional ZnCo 2 O 4 @Fe 3 O 4 /MWCNTs hybrid for the simultaneous determination of PAP and PAT using ZIF-8/67@Fe 3 O 4 as precursor and MWCNTs as conductive substrate. The ZnCo 2 O 4 @Fe 3 O 4 /MWCNTs/GCE sensor exhibits linear ranges 1.0–150.0 μM with detection limits of 0.033 μM and 0.018 μM for PAP and PAT, respectively. The developed sensor was successfully used for the determination of PAP and PAT in acetaminophen tablets and lake water with satisfactory results.
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高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Xiao Liang,Qiu-Lan Li,Ji-Tao Li,Wen-Bo Zhao,De-Zhi Yang,Ya-Ling Yang,Zi-Tao Zhong
Ochratoxin A (OTA) is recognized as a Group 2B carcinogen and poses significant dangers to human, making it crucial to regulate OTA levels in food products. Herein, we developed a colorimetric approach to analyze OTA utilizing the intrinsic catalytic oxidized activity of Fe 3 O 4 magnetic nanoparticles (MNPs). Our findings reveal that OTA shows a significant impact on the absorbance signal of the catalytic system, notably reducing the absorbance at 532 nm with H 2 O 2 and 4-aminoantipyrene (4-AP). This sensor does not require elaborate aptamer or antibody, omitting the cumbersome reaction and the loss during synthesis, thus simply realizing OTA detection. The signal correlates linearly with the OTA concentrations and achieves satisfied sensitivity. The practical application has been verified utilizing beer and rice samples, resulting in recoveries ranging from 91.0 % to 106.2 %. This accuracy and reliability verified the method feasibility for monitoring OTA levels in food products.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Meijun Liu,Yuxin Wang,Yueqi Chen,Tingting Zhang,Zhenbin Zhang,Houfen Li,Fengjun Shan,Taigang Ma
Hexavalent chromium (Cr(VI)) is one of the hazardous pollutants in wastewater because of acute toxicity and superb solubility. Graphene oxide (GO) is the promising adsorbent to handle Cr(VI), however, the drawbacks of easy aggregation, limited adsorption sites, unable valence changes and difficult recyclability hinder its further applications. In this study, Fe 3 O 4 modified L-glutamic acid functionalized graphene oxide (M−Glu/GO) was synthesized for Cr(VI) decontamination by the solvothermal method for effectively offsetting the above shortcomings. From characterization results, M−Glu/GO carried the traits of the relatively bigger surface area, abundant active sites, favorable surface charges and stable magnetic property. Cr(VI) adsorption process by M−Glu/GO was conformed to the pseudo-second order kinetic model with fast adsorption rate ( k 2 = 1.75 × 10 –3 g·mg −1 ·min −1 ) and Freundlich isotherm model with the maximum adsorption capacity of 75.63 mg·g −1 at 308 K, far more exceeding than GO (6.38 mg·g −1 ). Surprisingly, with the help of oxygen-containing groups, amine groups and Fe 3 O 4 with ample electron supplement, M−Glu/GO was capable of transforming partly Cr(VI) into Cr(III), realizing the detoxification. It exhibited practical application potentials with magnetic separation under various water matrices and kept a relative adsorption capacity of 70 % after 8 cycles. Furthermore, six interactions, involving pore filling, hydrophilic interactions, coordination interactions, anion-π interactions, electrostatic interactions and adsorption-reduction, witnessed the satisfied Cr(VI) adsorption by M−Glu/GO. This work paves a feasible way to accelerate the Cr(VI) adsorptive removal, and provides a vivid case for developing recyclable GO-functionalized adsorbents.
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高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Yuanqian Xiong,Xiaoyu Gao,Yu Wang,Xiangrui Deng,Chunhong Xiong,Jinsheng Zhang,Qianhui Gu,Ganhui Huang
Norfloxacin (NOR) is now extensively used for the treatment of human and animal diseases. Unfortunately, large accumulations of NOR will pose a significant threat to the human body. Thus, it is urgent to develop a rapid and sensitive detection technique for the trace determination of NOR. In this study, an electrochemical molecular imprinting sensor with great properties was fabricated for the determination of NOR in milk and environmental water. The incorporation of bovine serum proteins produced a hybrid recognition interface consisting of molecularly imprinted polymers and peptides that provided good recognition properties for norfloxacin. The Fe 3 O 4 @ZIF-8 was distributed orderly on the electrode after the embedding of the magnets inside the electrode, then the BSA was coated on the electrode with the electrodeposited AuNPs through Au-S bonding. The sensor constructed in this study achieved ultra-sensitive detection of norfloxacin with an effective area of 0.08433 cm 2 , a limit of detection (LOD) of 0.108 pmol·L −1 , and a wide linear range (1 ∼ 100, 100 ∼ 1000 and 1000 ∼ 8000 pmol·L −1 ). The prepared sensors exhibited satisfactory performance in the detection of milk and environmental water, with acceptable recoveries ranging from 96.24 % to 104.88 %, and the relative standard deviation (RSD) was no more than 4.84 %.
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高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 12
·e202400219
·
IF 1.9
Feng Zhou,Chen Xie,Yonggang Huo,Qingxu Yao
Graphical A series of novel MOFs based Bi x Ti y -BTC photocatalysts synthesized by the hydrothermal method for removal of UDMH from wastewater. The interconversion between Ti 3+ and Ti 4+ in Bi 1 Ti 3 -BTC promotes quick electrons transfer. And nano-Fe 3 O 4 prevented agglomeration of Bi 1 Ti 3 -BTC and improved photocatalytic activity, the optimal catalytic degradation performance of 97.02 % was observed at a Bi : Ti molar ratio of 1 : 3. Removal of organic pollutants from wastewater remains a significant challenge. Hence, we report a series of novel MOFs based Bi x Ti y -BTC photocatalysts synthesized by hydrothermal method for decontamination of 1,1-Dimethylhydrazine (UDMH). The preparation parameters of MOFs were optimized, the best catalytic performance was achieved by adjusting the Bi/Ti molar ratio to 1 : 3, with Bi 1 Ti 3 -BTC a photocurrent density of 0.35 mA/cm 2 was reached. The morphology and composition of the materials were analyzed, titanium doping increased the specific surface area. Bi 1 Ti 3 -BTC was loaded with magnetic nano-Fe 3 O 4 , which prevented agglomeration of Bi 1 Ti 3 -BTC and increased the specific surface area, thus improving photocatalytic activity. The band gap structure of the semiconductor materials was estimated by UV-Vis and XPS valence band spectra, while the separation efficiency of photogenerated carriers was investigated by photocurrent density and PL (Photoluminescence) spectrum. The photocatalytic degradation rate of UDMH rapidly decreased after addition of EDTA, indicating that h + was the main active species in the photocatalytic degradation process. The photocatalytic removal efficiency of UDMH with Bi 1 Ti 3 -BTC/Fe 3 O 4 at a concentration of 0.5 g/L reached 97.58 % after illumination for 180 min, and after 210 min near quantitative degradation was observed.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Yanjia Zhou,Guihong Lan,Yongqiang Liu,Songsong Xue,Bo Xu,Haiyan Qiu,Keyu Pu
To obtain a demulsification material with convenient recovery, high oil-water separation capacity, and excellent reusability, Fe 3 O 4 @SiO 2 core-shell particles and hydrophilic DMC were introduced into the acrylic ester-based polymer system to prepare a magnetic amphiphilic composite demulsifier, Fe 3 O 4 @SiO 2 /poly(SMA-co-BA-co-BZMA-co-DMC) (Fe 3 O 4 @SiO 2 /PAMCs-P). The molecular structure of Fe 3 O 4 @SiO 2 /PAMCs-P was characterized using FT-IR and XPS, while the morphology was observed using SEM. Additionally, the effects of TEOS, Fe 3 O 4 @SiO 2 core-shell particles, and DMC dosage on the demulsification performance of the composites were discussed in detail. Fe 3 O 4 @SiO 2 /PAMCs-P exhibited excellent demulsification, oil-water separation, and reusability properties for CTAB-toluene emulsions. Under magnetic field conditions, Fe 3 O 4 @SiO 2 /PAMCs-P achieved saturated separation within 2 h with a separation efficiency of 97.9%. After five consecutive separations, the separation efficiency decreased to 39.1%, but it could be restored to 91.5% of the initial separation efficiency after desorption. These results indicate that Fe 3 O 4 @SiO 2 /PAMCs-P has valuable application potential in emulsified wastewater treatment.
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高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Tiemei Li,Xin Zhang,Lichong Duan,Shuhao Cui,Yingyu Chang,Xia Zhang
A new ferrofluid based on hydrophobic deep eutectic solvent and Fe 3 O 4 @NH 2 -graphene oxide was designed, and then used as extraction medium for the extraction and analysis of estrogens in water by coupled with vortex-assisted liquid-liquid micoextraction and high performance liquid chromatography. The morphology, structure, thermal stability and magnetic property of the material were studied by scanning electron microscope (SEM), Fourier Transform-Infrared Spectroscopy (FT-IR), X-ray diffraction (XRD), thermogravimetric analysis (TGA) and vibrating sample magnetometer (VSM). Four estrogens, including estradiol (E2), ethinyl estradiol (EE2), bisphenol AP (BPAP) and hexestrol (HEX), were used as the model analytes. Key parameters related to the ferrofluid preparation and extraction conditions were optimized by single-factor and response surface method. Under the optimal conditions, good linearity (R 2 > 0.99) in the concentration ranges of 0.1–200, 0.2–200, 0.007–200 and 0.15–200 μg/L were obtained for E2, EE2, BPAP and HEX, respectively. The limits of detection for E2, EE2, BPAP and HEX were 0.030, 0.070, 0.002 and 0.05 μg/L, respectively. The established method was successfully applied for the quantification of E2, EE2, BPAP and HEX in urine, environmental water, beverage and package samples. The method was simple, rapid, sensitive and producible.
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高影响因子
MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 11
·1-12
·
IF 5.3
Nie Zheng,Sun Juan,Wu Fangjun,Lai Fujie,Yang Xudong,Chen Shaoyang,Wang Yang,Jiang Yong
A novel immunomagnetic bead was prepared and designed to be combined with a smartphone app for the rapid detection of SARS-CoV-2 antibody in serum. The nucleocapsid protein (N protein) of SARS-CoV-2 was immobilized on the prepared magnetic polymer microspheres (Fe 3 O 4 @PMAA) with core-shell structure by 1-(3-dimethylaminopropyl)-3-ethylcarbodiimid/N-hydroxy succinimide (EDC/NHS) to form the immunomagnetic beads (Fe 3 O 4 @PMAA-NP) capable of binding antibodies specifically. Combining its magnetic separability with the image analysis function of the smartphone app, a novel detection platform was established on a 96-well plate. The platform can realize rapid separation and colorimetric detection of antibodies within 30 min, and the detection limit is 0.5 µg/mL. This method has the advantages of portability, rapidity, high sensitivity and low cost, which is suitable for home self-test and on-site detection. This study not only provides an innovative method for the antibody detection of SARS-CoV-2 in serum, but also provides a favorable reference for the practical application of functionalized magnetic polymer materials in the medical field. Graphical
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高影响因子
危险品化学品经营许可证（带存储）