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.
研究领域:
分析化学
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材料科学
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医学检测
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 17
·7441-7455
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IF 4.5
Wang Yijie,Li Qiulan,Xia Qinghai,Yang Yaling,Yang Dezhi
Sensitive and effective detection of xanthine oxidase (XOD) is essential for assessing human health. Herein, a dual-enzyme-based cascaded reaction system was developed for xanthine and xanthine oxidase assay based on the peroxidase (POD)-like catalytic activity of Fe 3 O 4 @MWCNTs/Hemin nanocomposite. The XOD could catalyze xanthine to produce H 2 O 2 , which is subsequently converted by Fe 3 O 4 @MWCNTs/Hemin into hydroxyl radicals (·OH) to oxidize 3,3′,5,5′-tetramethylbenzidine (TMB) to produce a light blue. Notably, it is demonstrated that the modification of MWCNTs and Hemin could significantly enhance the POD-like activity from 9.78 × 10 −8 M s −1 ( V max value of Fe 3 O 4 ) to 23.34 10 −8 M s −1 ( V max value of Fe 3 O 4 @MWCNTs/Hemin), which makes the detection of xanthine oxidase more sensitive. By using the smartphone to capture the colorimetric signal of oxidized TMB (oxTMB), the assay can detect xanthine and XOD as low as 0.250 µM and 0.216 mU mL −1 , respectively. The reliability of the method in human serum suggested satisfactory spiked recoveries in the range of 92.350–105%. This work provided a new insight for Fe 3 O 4 -based nanozyme design and monitoring XOD level in blood. Graphical Abstract
研究领域:
生物化学
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纳米技术
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分析化学
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医学诊断
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产品关联
DOI
高影响因子
TALANTA
·
2024
·
IF 5.6
Qiulan Li,Jitao Li,Yang Jiao,Xiaolan Yang,Dezhi Yang,Zitao Zhong,Yaling Yang
The pathogenic bacteria induced foodborne disease has been detrimental to public health worldwide. Herein, the peroxidase (POD)-like Fe 3 O 4 /MWCNTs@Mo-CDs (FMMC) nanozyme was applied for the detection of Escherichia coli ( E. coli ). The E. coli aptamer was conjugated with the surface of the FMMC, which effectively enhanced the POD-like activity attributing to the higher affinity to the substrate, and then specific capture of E. coli in food matrices, leading to the reduction of POD-like activity. Therefore, a robust and facile colorimetric aptasensor was developed for detecting E. coli with a wide linear range of 10 1 –10 6 CFU/mL, low LOQ of 10 1 CFU/mL and LOD of 0.978 CFU/mL. The aptasensor demonstrated the satisfied selectivity for E. coli compared to the other strains. This method possessed the potential application for fast in situ screening of foodborne pathogens in food products.
研究领域:
纳米技术
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生物技术
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食品科学
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分析化学
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微生物学
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产品关联
DOI
PubMed
高影响因子
Foods
·
2022
·Vol. 12
·期 1
·138
·
IF 5.561
Min Li,Pengxiang Wang,Xu Zhang,Hongyu Wang,Ke Li,Yanhong Bai
Heterocyclic aromatic amines (HAAs) generated during the cooking of meats cause adverse effects on human health. The purpose of the current research was to develop a modified QuEChERS (Quick, Easy, Cheap, Effective, Rugged, Safe) method using magnetic multi-walled carbon nanotubes (Fe3O4-MWCNTs) as clean-up adsorbents for the rapid determination of HAAs in braised sauce beef. The significant parameters in extraction and clean-up processes were screened and optimized. Under optimal conditions, the LODs ranged from 3.0 ng/g to 4.2 ng/g. The recoveries (78.5–103.2%) and relative standard deviations RSDs (<4.6%) of five HAAs were obtained. These are in accordance with the validation criteria (recovery in the range of 70–120% with RSD less than 20%). Compared with conventional clean-up adsorbents (PSA or C18), Fe3O4-MWCNTs displayed equivalent or better matrix removal efficiency, while making the pretreatment process easier and more time-saving through magnetic separation. Less usage of adsorbent makes the method possess another advantage of being lower in cost per sample. The method developed was successfully applied to analyze real samples collected from local deli counters, demonstrating Fe3O4-MWCNTs could be considered as an effective alternative adsorbent with great potential in the QuEChERS process.Keywords:heterocyclic aromatic amines;QuEChERS;Fe3O4-MWCNTs;braised sauce beef
研究领域:
食品科学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Zeyu Wang,Luyao Dai,Jiachao Yao,Tianjiao Guo,Dzmitry Hrynsphan,Savitskaya Tatsiana,Jun Chen
Multi walled carbon nanotubes (MWCNTs) have attracted more and more attention as adsorbents due to their excellent adsorption properties. By loading metal particles on MWCNTs, the chemical reduction ability of adsorbed pollutants could be provided, so as to achieve the purpose of adsorption and degradation of pollutants. Therefore, the removal process of NO 3 − -N by Fe–Pd–Fe 3 O 4 /MWCNTs was studied, including rapid adsorption of initial pollutants, gradual reduction of intermediate products and re-adsorption of final products. The results showed that Fe–Pd–Fe 3 O 4 /MWCNTs completely removed NO 3 − -N within 2 h, 39% and 25% of which were converted into NO 2 − -N and NH 4 + -N. The adsorption efficiency, kinetics, capacity and adsorption energy all followed the order of NH 4 + -N > NO 2 − -N > NO 3 − -N. With the recoverability and reusability of Fe–Pd–Fe 3 O 4 /MWCNTs having been confirmed in 5 consecutive cycles, the removal rate of NO 3 − -N still reached 43%. It has been shown that MWCNTs prolonged the reducing power for NO 3 − -N, due to avoiding the aggregation of metal particles. The rapid adsorption of initial pollutants, effective stepwise reduction and convenient recovery processes were of great value for the rehabilitation of polluted water.
研究领域:
环境科学
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材料科学
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水处理技术
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产品关联
DOI
PubMed
高影响因子
Nano-Micro Letters
·
2023
·Vol. 16
·期 1
·1-14
·
IF 26.6
Yang Jianming,Wang Hu,Zhang Yali,Zhang Hexin,Gu Junwei
A layered segregated shielding network was organized in porous PBAT/Fe 3 O 4 @MWCNTs/Ag composite by scCO 2 foaming and scraping techniques.
The composite foam achieved an electromagnetic interference (EMI) shielding effectiveness (SE) of up to 68.0 dB and a reflectivity of as low as 23% due to the “absorption-reflection-re-absorption” shielding mechanism.
The solid and foamed PBAT/Fe 3 O 4 @MWCNTs/Ag composites displayed superior retention (> 92%) of EMI SE even after peeling experiment of 500 times under 100 g weight pressure.
研究领域:
材料科学
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电磁学
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环境科学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 106
·61847-61854
·
IF 3.708
Wenbing Li,Yanju Liu,Jinsong Leng
In this work, a novel type of shape memory polymer nanocomposite was fabricated using chemically cross-linked poly(ε-caprolactone) with allyl alcohol as the matrix and Fe3O4 nanoparticles decorated conductive multiwalled carbon nanotubes (Fe3O4@M) as a magnetism and electricity responsive source. The nanocomposite exhibited excellent shape memory performance with a multistage stimulus recovery from a temporary shape to a permanent shape, triggered by an alternating magnetic field, an electric field and hot water, respectively. Uniquely, the nanocomposite also displayed significant two-way reversible shape memory behavior under constant load conditions, which was not demonstrated previously. An alamar blue assay was also used to prove that the material possessed good biocompatibility. The results showed that the material could have good potential application in sensors, functional tissue engineering constructs and artificial muscles.
研究领域:
生物材料学
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组织工程
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智能材料
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再生医学
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生物力学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
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IF 5.1
Wenhan Wang,Yongpeng Wang,Mengzhu Liu,Naidi Tan
Nowadays, high-efficiency electromagnetic wave absorption (EWA) materials with simple preparation techniques are desirable for practical applications. However, there are many obstacles need to be overcome. In this work, a novel 3D hollow tubular/spherical structure system has been established by using Fe 3 O 4 as a magnetic loss component, MWCNTs as a dielectric loss component, fly ash cenospheres (FACs) as a structural skeleton through simple self-assembly to achieve excellent EWA properties. Particularly, FACs which derive from power plant solid waste are hollow and insulating that help to regulate the electromagnetic parameters, the conductivity, and the impedance matching characteristics of the composites, as well as reduce the cost. The effect of the unique heterogeneous structure with multiple interfaces on the EWA performance is investigated. The superior absorption performance is primarily due to the synergistic effect of component design and the unique tubular/spherical structure, which provide efficient interfacial polarization loss, dipole polarization loss, moderate conductive loss, good impedance matching, and a large transmission route. The effective absorption bandwidth is as wide as 3.8 GHz at a thickness of 2.0 mm, and the RL min value is −47.35 dB at a thickness of 3.0 mm. The prepared Fe 3 O 4 /MWCNTs/FAC composites have excellent EWA properties that are superior to the majority of recently reported comparable composites. The product meets the requirements of high absorption performance, simple preparation, stable structure, low cost and environmental friendly, which greatly improves its applicability.
研究领域:
材料科学
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环境科学
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电磁学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Macromolecular Science Part B-Physics
·
2026
·
IF 1.4
Suwei Gao,Yucheng Wang,Liang Li,Xi Wang,Qiaofeng Wei,Shuyue Zhu,Rangtong Liu
The development of high-performance electromagnetic wave (EMW) absorbing materials aims to achieve high-intensity electromagnetic attenuation and wide effective absorption bandwidth (EAB), but in fact, it is challenging for them to optimize synchronously. In this paper, through the hydrothermal method, an EMW absorber was synthesized by loading nanomagnetic Fe3O4 on multi walled carbon nanotubes (MWCNTs), of which the structure and properties depend on precursor (FeCl3·6H2O) addition and MWCNTs modification. Using this absorber, a coating named Fe3O4/MWCNTs/WPU with good EMW absorption performance was prepared with waterborne polyurethane (WPU). By characterizing the structure and properties of the absorbers and coatings, it was found that the optimal distribution of Fe3O4 particles presented when adding 1.0 g FeCl3·6H2O. After MWCNTs acidizing modification, Fe3O4 particles present on them with a “bead-chain” like uniformly dense structure, and the coating exhibited a wider EAB of 8.64 GHz at a thickness of 3.0 mm and a smaller reflection loss of −52.61 dB at a thickness of 4.0 mm. These findings effectively achieve the balance between EAB and intensity of EMW, and reveal some principles for optimizing electromagnetic absorption, providing important basis for designing new materials with wide bandwidth and strong absorption capacity.
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产品关联
DOI
高影响因子
TALANTA
·
2023
·
IF 6.1
Haotian Wu,Gang Zhang,Xiaozhan Yang
An electrochemical biosensor based on iron tetroxide (Fe 3 O 4 )/carboxylated carbon nanotubes (MWCNTs-COOH)/gold nanoparticles (AuNPs) was designed for the detection of alpha-fetoprotein (AFP), which is often used as an important indicator for the early clinical diagnosis of liver cancer markers. The Fe 3 O 4 /MWCNTs-COOH nanocomposite was synthesized by a solvothermal method and it combined with gold nanoparticles (AuNPs) deposited at the constant potential on a glassy carbon electrode to form Fe 3 O 4 /MWCNTs-COOH/AuNPs, which intensifies the electrical signal while the large active sites enable more stable immobilization of the AFP monoclonal antibodies on the electrode. The electrochemical performance of Fe 3 O 4 /MWCNTs-COOH/AuNPs was investigated in detail and the electrochemical response signal after the immune reaction with the AFP antigen-antibody was recorded. The peak current Ip of the response signal is linearly proportional to the lg c AFP in the range of 1 pg mL −1 –10 μg mL −1 , with a detection limit of 1.09034 pg mL −1 and good performance in clinical sample testing. The proposed sensor has shown great application and development potential in clinical medicine field.
研究领域:
生物化学
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纳米技术
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生物医学工程
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临床医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2013
·
IF 3.473
Yingying Luo,Ziyang Lu,Yinhua Jiang,Dandan Wang,Lili Yang,Pengwei Huo,Zulin Da,Xuliang Bai,Xulan Xie,Pengyi Yang
The magnetic and dual conductive imprinted photocatalysts (MCIPs) were synthesized through the suspension polymerization method. TiO 2 /Fe 3 O 4 /MWCNTs, 1-methylimidazole-2-thiol and pyrrole were used as supports, template molecule and functional monomer, respectively. The MCIPs were further characterized by X-ray diffraction (XRD), Fourier transform infrared spectra (FT-IR), scanning electron microscopy (SEM), transmission electron microscope (TEM), UV–visible diffuse reflectance spectra (UV–vis DRS), thermogravimetric analysis (TGA) and vibrating sample magnetometer (VSM). The result revealed that polypyrrole (PPy) was formed and well embedded in the surface imprinted layer of TiO 2 /Fe 3 O 4 /MWCNTs. Owing to PPy and MWCNTs, the MCIPs was equipped with dual conductivity which was particularly useful for photodegradation of 1-methylimidazole-2-thiol in aqueous solution under ultraviolet irradiation. Through a series investigation of factors, it was obvious that when the polymerization time was 24 h and the adding dose of pyrrole was 8 mmol, the resulting MCIPs obtained the highest photocatalytic ability. In addition, the photodegradation process obeyed the pseudo-first-order kinetic reaction and exhibited an excellent selective degradation ability of 1-methylimidazole-2-thiol. The degradation intermediate products and mechanism of 1-methylimidazole-2-thiol were further discussed.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Xenobiotics
·
2025
·Vol. 15
·期 4
·102
·
IF 4.4
Yabing Shan,Ying Chen,Jiayi Li,Xianbin Zeng,Rui Jia,Yuwei Liu,Dongmei Li,Di Chen
Background: Amphetamine-type stimulants (ATS) in water pose significant public health and ecological risks, necessitating reliable and efficient detection methods. Current approaches often involve time-consuming pH adjustments and post-processing steps, limiting their practicality for high-throughput analysis. This study aimed to develop a streamlined method integrating pH regulation and adsorption into a single material to simplify sample preparation and enhance analytical efficiency. Methods: A novel Fe3O4/MWCNTs-OH/CaO composite adsorbent was synthesized via a one-pot grinding method, embedding pH adjustment and adsorption functionalities within a single material. This innovation enabled magnetic solid-phase extraction (MSPE) without pre-adjusting sample pH or post-desorption steps. The method was coupled with liquid chromatography–tandem mass spectrometry (LC-MS/MS) for ATS detection. Optimization included evaluating adsorption/desorption conditions and validating performance in real water matrices. Results: The method demonstrated exceptional linearity (R2> 0.98), low detection limits (0.020–0.060 ng/mL), and high accuracy with relative recoveries of 92.8–104.8%. Precision was robust, with intra-/inter-day relative standard deviations (RSDs) below 11.6%. Single-blind experiments confirmed practical applicability, yielding consistent recoveries (relative errors: 1–8%) for ATS-spiked samples at 0.8 and 8 ng/mL. Compared to existing techniques, the approach reduced processing time to ~5 min by eliminating external pH adjustments and post-concentration steps. Conclusions: This work presents a rapid, reliable, and user-friendly method for ATS detection in complex environmental matrices. The integration of pH regulation and adsorption into a single adsorbent significantly simplifies workflows while maintaining high sensitivity and precision. The technique holds promise for large-scale environmental monitoring and forensic toxicology, offering a practical solution for high-throughput analysis of emerging contaminants.
研究领域:
环境科学
·
分析化学
·
毒理学
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材料科学
·
公共卫生
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）