FOOD CONTROL
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2024
·
IF 5.6
Xia Xu,Xin Liu,Yixing Qiu,Yufan Song,Xuxia Zhou,Yuting Ding
The accurate determination of histamine in fish is imperative for food safety, given the toxic nature of this biogenic amine . This study presents an innovative colorimetric aptasensor for the ultrasensitive detection of histamine in fish, utilizing nanozymes based on magnetic metal-organic frameworks coated with Pt nanoparticles (Fe 3 O 4 @MOF@Pt), which exhibit high peroxidase-like catalytic activity, magnetism, and superior optical properties. The surface of Fe 3 O 4 @MOF@Pt nanozymes were modified with DNA strands complementary to the histamine aptamer , creating effective colorimetric probes. In the presence of histamine, these colorimetric probes compete with histamine molecules for aptamer binding on the enzyme plate. Color development is triggered by adding a TMB and H 2 O 2 substrate solution to the enzyme plate. This competitive binding-based aptasensor allows for rapid and accurate histamine quantification within a linear range of 10 pM to 10 μM, and a notable detection limit of 6.23 pM. Furthermore, the sensor demonstrated excellent specificity, distinguishing histamine from l -histidine and other biogenic amines. Tested on mackerel samples, the aptasensor showed spiked recoveries of 91.4%–109.6%, validating its practical applicability. This sensor offers an ultrasensitive, specific, and reusable tool for histamine detection, representing a significant advancement in ensuring the safety of fish products.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Rongcong Li,Liu Yang,Ruizhi Li,Yingke Zhou
Carbon modified nitrogen-doped Fe 3 O 4 (N–Fe 3 O 4 @C) nanorod array directly grown on carbon cloth was fabricated. Nitrogen-doping and carbon shell effectively decrease the potential barrier of ion migration of the oxides and improve the electrochemical performance. An enhanced donor density of N-Fe 2 O 3 (7.6 × 10 15 cm −3 ) is achieved with optimized doping temperature. Following with carbon coated, the optimized N–Fe 3 O 4 @C electrode showed ultrahigh capacitance over an extended potential window and remarkable cycling performance. A new quasi-solid-state supercapacitor with N–Fe 3 O 4 @C and NiCoP@Ni(OH) 2 achieved high voltage to 2.0 V and high energy density (72.37 Wh kg −1 , 2.36 mWh cm −3 ).
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BIOSENSORS & BIOELECTRONICS
·
2017
·
IF 7.78
Wenjing Jiang,Linni Wu,Junling Duan,Huanshun Yin,Shiyun Ai
An ultrasensitive sandwiched electrochemiluminescence (ECL) immunosensor was developed for 5-hydroxymethylcytosine (5hmC) detection in genomic DNA by using Fe 3 O 4 @SiO 2 core–shell magnetic nanomaterial as a immobilization matrix for anti-5hmC antibody, PAMAM conjugated avidin and Ru(bpy) 2 (phen-5-NH 2 )(PF 6 ) 2 as signal amplification unit. Importantly, Fe 3 O 4 @SiO 2 nanoparticles were verified to not only possess enormous surface for loading antibody by amido link, but also exhibit excellent bioactivity . With the dual signal amplification strategy, the ECL immunosensor showed wide detection range from 0.1 to 30 nM with low detection limit of 0.047 nM (S/N = 3). Based on the specific immunoreaction, the developed method also illustrated excellent detection selectivity . The fabricated immunosensor was also applied to detect the 5hmC in genomic DNA of cancer tissue, which indicated that the immunosensor possess potential applications in clinical detection.
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PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Haofei Sima,Bo Liu,Xiaolin Shi,Zifei Zhao,Chaozong Liu,Chunling Zhang
In light of the exponential growth of flexible human-computer interactions and telecommunications, it is becoming increasingly important to develop a high-sensitivity strain sensor to monitor human movement. Herein, the biocompatible, adhesive, and flexible Tannic acid-Fe 3 O 4 @MXene-poly(methacryloxyethyl sulfobetaine/acrylamide) (TFM) hydrogel has been prepared to realize the dual-functional applications in strain sensitive sensor and electromagnetic interference (EMI) shielding. The polymer network and 2D conductive filler MXene together construct the conductive network inside the hydrogel. The interpenetrating network and hydrogen bond between poly(acrylamide) and poly(methacryloxyethyl sulfobetaine) chain enhance the mechanical property of hydrogel, which is also improved by the complexation between Fe 3 O 4 and the catechol groups of tannic acid. Benefiting from the excellent electrical conductivity (∼1.33 S/m) and mechanical property of the TFM hydrogels, the strain sensor displays compressive strain (∼77.6 %) and elongation (∼308.5 %), adhesion (∼16 kPa), compression sensitivity (∼42.6 Pa −1 ), gauge factor (GF = 2.38), and cyclic stability (∼50 cycles). TFM hydrogels can monitor strain distribution sensing, pulse beating and human movement detection. Moreover, the TFM hydrogel exhibits an absorption-predominant EMI shielding performance with an effective value of ∼25.2 dB. This work provides a new inspiration for the development of multifunctional hydrogels in the fields of artificial intelligence, human-computer interaction, and EMI shielding technology.
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高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Peng Tang,Jiawei Du,Mang Li,Xueying Zhao,Huiqi Ren,Xuyang Zhang,Guohua Wu,Xiangwei Wang
Core–shell structures are commonly employed in microwave absorption (MA) materials due to their distinctive interfacial architecture. In this study, ferroferric oxide@polypyrrole (Fe3O4@PPy) nanocomposites with hollow core–shell structures were successfully synthesized for MA using a solvothermal process, followed by in situ polymerization. The minimum reflection loss (RLmin) frequency of the nanocomposites can be precisely controlled by adjusting the thickness of the PPy shell. The thickening of the PPy shell enhances the conduction loss of the nanocomposites, thus, enhancing the dielectric loss of the nanocomposites. The fabricated FP-170, FP-180 and FP-190 nanocomposites exhibit remarkable MA properties at low frequencies, with their RLmin reaching −63.82 dB, −84.92 dB, and −71.25 dB at 4.55 mm, 3.87 mm, and 2.64 mm, respectively. The maximum effective absorption bandwidth (EABmax) of FP-170 extends to 3.48 GHz at 2.39 mm, FP-180 extends to 4.20 GHz at 2.38 mm, and FP-190 extends to 4.96 GHz at 2.16 mm. The FP-200 nanocomposite, which has PPy shell thickness of 15 nm, exhibits exceptional radar stealth performance, with Radar Cross-Section (RCS) values below −17.68 dB·m2 within the range of −90° to 90°. Both simulation and experimental results prove that the hollow core–shell structured Fe3O4@PPy nanocomposite is an excellent candidate for MA applications.
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Materials Research Express
·
2025
·Vol. 12
·期 2
·025305
·
IF 2.2
Guangyuan Yang,Jing Che,Xiaokang Zhao,Congxin Chen,Sanwen Peng,Heng Yang,Bin Zhang
The increasing complexity of electromagnetic environments demands the development of advanced absorbers with superior performance. In this study, a novel magnetic Fe3O4-modified graphene-based absorber (FARGO) is synthesized via an in situ reduction process using polyether amine. The resulting FARGO composite exhibits excellent microwave absorption properties. When the filling content of FARGO is 5 wt% in epoxy resin, the optimal reflection loss is −23.12 dB with a thickness of 4 mm and a broad absorption bandwidth of 5.6 GHz can be achieved as the thickness changes to 2 mm. Polyether amine efficiently reduces GO to rGO, significantly improving electrical conductivity. Simultaneously, it grafts amine groups onto the graphene surface, enhancing dispersion and reactivity within the epoxy resin matrix. These synergistic effects make it a promising candidate for high-performance microwave absorbing materials.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Dongyao Yue,Zhe Wang,Jing Chang,Shaopo Wang,Jingjie Yu,Hongying Meng,Rui Zhang
In the O 3 self-decomposition process, the poor HO 2 − formation efficiency limits O 3 decomposition and •OH production. Although the addition of Fenton’s reagent facilitates this process, H 2 O 2 consumption and Fe(III) sedimentation must be addressed. In this study, carbon-coated Fe 3 O 4 (Fe 3 O 4 @C) samples were prepared using the metal–organic frameworks (MOFs) modification method for the catalytic ozonation of aromatics, which effectively solved the above challenges. The fabricated 4-Fe 3 O 4 @C catalyst not only exhibited a yolk-shell structure, but also increased •OH production by 9-fold, resulting in optimal target removal, mineralization, and O 3 decomposition efficiency. Further investigation confirmed that the activity of 4-Fe 3 O 4 @C was owing to the combined action of Fe(II) on the catalyst surface and the H 2 O 2 produced from aromatic degradation. Furthermore, the outer carbon layer with reducing properties regenerated Fe(II) in a timely manner, ensuring catalyst durability. Finally, a clear pathway for enhancing O 3 decomposition and •OH generation is proposed.
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高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2024
·
IF 4.5
Yuchen Yang,Xiaoyan Yuan,Xiangkui Ren,Lixia Ren
Microwave-absorbing materials are very important to reduce electromagnetic interference and pollution. Combining multi-component materials with multiple loss mechanisms is a practical strategy for enhancing microwave absorption performance. In this work, we synthesize a magnetic poly(ionic liquid) (PVim[FeCl 4 ]) with crosslinkable groups and prepare PVim[FeCl 4 ]/graphene oxide (GO)/Fe 3 O 4 composites by incorporating GO and Fe 3 O 4 to enhance the microwave absorption property of the composites. The synergistic effect of GO and Fe 3 O 4 is studied at different feeding ratios, the PVim[FeCl 4 ]/10%GO/20%Fe 3 O 4 composite shows better microwave absorption performance, with a minimum reflection loss ( RL min ) of −49.54 dB at 17.31 GHz and 7.1 mm thickness, along with an effective absorption bandwidth (EAB) of 2.52 GHz. This enhancement can be attributed to the quarter-wavelength matching model, well-matched characteristic impedance, and multiple loss mechanisms originating from PVim[FeCl 4 ], GO, and Fe 3 O 4 . The magnetic poly(ionic liquid) composites show promising prospects in microwave absorbing materials.
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高影响因子
Biomass Conversion and Biorefinery
·
2024
·
IF 3.5
Zhang Meng
In the current work, a magnetic nanocomposite containing carbon nanotubes (CNT), starch, and Fe 3 O 4 was synthesized to decontaminate lead (Pb 2+ ) and cadmium (Cd 2+ ) ions from water. The properties of magnetic nanocomposite (CNT/starch/Fe 3 O 4 ) were determined using X-ray diffraction (XRD), vibrating sample magnetometer (VSM), Brunauer–Emmett–Teller (BET), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy dispersive X-ray (EDX), and mapping techniques. The value of the BET area and magnetic saturation for the nanocomposite were 54.18 m 2 /g and 28.36 emu/g, respectively. The maximum removal of Pb 2+ (99.74%) and Cd 2+ (98.76%) was attained at 25 °C, decontamination duration of 50 min, a metal content of 10 mg/L, composite mass of 1 g/L, and pH 6 (for Pb 2+ ) and 7 (for Cd 2+ ). The pseudo quadratic model had a more significant potential to describe the metal removal behavior as it has a lower RMSE and a higher R 2 than other models. The intraparticle penetration model revealed that more than one mechanism is effective in adsorption. The adsorption process data obeyed the Langmuir model with a q m factor of 50.36 mg/g (Pb 2+ ) and 44.72 mg/g (Cd 2+ ). The E value was determined to be < 8 kJ/mol, which indicates that the process is physical. The metal removal using the CNT/starch/Fe 3 O 4 composite was spontaneous and exothermic, and during adsorption, the random interactions between the composite and metal ions were reduced. The outcomes showed that the desired adsorbent can absorb and desorb Pb 2+ and Cd 2+ and can be used as an effective adsorbent in cleaning aqueous solutions containing heavy metal.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Qianwen Xue,Weihao Wu,JiangQin Wu,Yuxuan Zhang,Xiaofang Gao,Zaosheng Lv,Yang Lei,Yanfen Huang
Superhydrophobic coatings are ideal for industrial applications involving oil spill cleaning, de-icing, anti-fouling, and anti-icing. The majority of current superhydrophobic coating preparation techniques have significant costs and pollute the environment, which are incompatible with the principles of sustainable green development. In this study, we produced a superhydrophobic coating based on the low-cost green material chitosan, Fe 3 O 4 nanoparticles, and octadecylamine, which possesses photothermal characteristics and magnetic oil-water separation properties. Among these, octadecylamine supplied a lower surface energy and nano-Fe 3 O 4 supplied the coating's surface roughness structure. Under simulated sunlight, the fabricated coatings produced a pronounced photothermal effect. The surface temperatures of the polyurethane sponge coating and the cotton fabric coating rose to 144.6 °C and 117.5 °C, respectively, after just 5 min. Furthermore, the coatings can be used for magnetically-driven oil-water separation with a certain degree of recyclability. The oil-water separation efficiency of the coating can reach 92% and above. More importantly, the coating also has excellent mechanical stability and self-cleaning properties. Therefore, this cheap and environmentally friendly nano-Fe 3 O 4 /chitosan-based superhydrophobic coating has great potential for application.
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高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Yijing Ai,Behisht Ara,Baoli Wang,Mansoor Ahmad,Xiao Han,Lisi Wang,Shuhai He,Ruifeng Li,Wei Sun
In this study, a novel one-step synthesis method is proposed for self-supported electrodes by fabricating Fe 3 O 4 loaded three-dimensional graphene through laser-induced pyrolysis (Fe 3 O 4 -LIGE). This electrode offers the advantages including high sensitivity, straightforward manufacturing process, cost-effectiveness, and environmentally benign, making it highly suitable for large-scale industrial production. Subsequently, a portable electrochemical sensor and a flexible supercapacitor were constructed based on Fe 3 O 4 -LIG as active material. The Fe 3 O 4 -LIGE demonstrated a significant increased electrochemically active area for adsorption, coupled with the reduced electron transfer resistance. This combination resulted in an increased number of active sites for the electrochemical reaction. Furthermore, the portable electrochemical sensor based on Fe 3 O 4 -LIGE can be utilized for the sensitive detection of chloramphenicol, which was further applied to the real honey and pork samples with a detection range from 10.0 nmol/L to 5.0 mmol/L and a detection limit of 3.1 n mol/L. Additionally, the flexible supercapacitors constructed from Fe 3 O 4 -LIGE exhibited an excellent reversibility and stability, achieving a specific capacitance of 12.07 mF/cm 2 at a current density of 0.05 mA/cm 2 , which was superior to the capacitance of most previously reported LIG-based devices. In summary, both the electrochemical sensors and the supercapacitors based on Fe 3 O 4 -LIGE demonstrated excellent performances. This innovate and rapid electrode preparation method may pave the way for large-scale fabrication of flexible electronics.
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高影响因子
ChemistrySelect
·
2024
·Vol. 10
·期 1
·e202405135
·
IF 1.9
Zhanmeng Liu,Mang Lu,Haitao Gan,Jiacheng Li,Guiqing Gao,Manqing Xu,Xianglian Wang
Graphical OTC molecules diffuse to the surface of FU3 to cause film diffusion, and continue to diffuse and fill into large-, medium- and micro-pores of FU3. FU3 can be π─π conjugated and cation─π bonded with the benzene rings and amino groups of OTC. The charged surface of FU3 leads to a strong electrostatic effect in the adsorption process. The doping of Fe 3 O 4 produces structural defects to promote the OTC adsorption. As one of the most stable metal-organic frame materials (MOFs), UiO-66 has attracted extensive attention in the adsorption field. However, the application of UiO-66 is still constrained by the weak electron-hole charge separation capability and the low accessibility of micropores. In this study, the mesoporous defects of UiO-66 were constructed with acetic acid and doped with Fe 3 O 4 to prepare magnetically recyclable Fe 3 O 4 @UiO-66. The doping of Fe 3 O 4 resulted in the formation of denatured mesoporous defects in UiO-66, which was conducive to adsorption oxytetracycline (OTC) in water. The crystal structure and physicochemical characteristics of Fe 3 O 4 @UiO-66 were examined. By using the static adsorption technique, the adsorption characteristics and mechanism of OTC on Fe 3 O 4 @UiO-66 were investigated. The results reveal that Fe 3 O 4 @UiO-66 has an adsorption capacity of 210 mg g −1 and an OTC removal ratio of 84.0%. The pseudo-second-order kinetics, Elovich, and Langmuir isothermal adsorption models were all applicable to the adsorption process. The adsorption process increased entropy and was an endothermic reaction. Solution pH has a little effect on the adsorption performance. This study provides the possibility of one-step synthesis of MOFs that can efficiently adsorb tetracycline antibiotics in water with low cost and excellent recyclability and reusablity.
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高影响因子
危险品化学品经营许可证（带存储）