Nano-Micro Letters
·
2025
·Vol. 17
·期 1
·1-22
·
IF 36.3
Shao Runze,Wang Guilong,Chai Jialong,Lin Jun,Zhao Guoqun,Zeng Zhihui,Wang Guizhen
The Janus-type multifunctional ultra-flexible polytetrafluoroethylene-carbon nanotube-Fe 3 O 4 /MXene (FCFe/M) membranes were fabricated via a shear-induced in situ fibrillation technique followed by vacuum-assisted filtration.
Thanks to the strategic distribution of the MXene conductive reflection layer and the silk-like FCFe electromagnetic wave’s absorption layer, the membranes achieve robust electromagnetic interference shielding and effective antireflection through the absorption-reflection-reabsorption mechanism.
The membranes exhibit exceptional thermal management performance, including efficient heat dissipation and electrothermal/photothermal conversion capabilities, further enhancing their promising potential for applications in flexible wearable technologies.
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ACS Applied Nano Materials
·
2024
·
IF 5.3
Zhiyuan Meng,Qinchao Wu,Xinyi Wu,Chunmei Yang,Wangjin Xu,Tingting Lin,You Liang,Xiaojun Chen
The enhancement of pesticide utilization efficiency for improved biological activity, while promoting crop growth to enhance disease resistance, holds significant importance in agricultural production. In this study, we developed an enzyme-responsive azoxystrobin (AZOX) delivery system using iron-based mesoporous materials as porous carriers and pectin (Pec) as an encapsulation agent to manage rice sheath blight. The resultant AZOX-AFS-Pec nanoparticles (NPs) exhibit high loading capacity and could intelligently release AZOX in acidic conditions in the presence of pectinase. Notably, AZOX-AFS-Pec NPs demonstrated improved wetting and adhesion properties on rice blades, thereby augmenting AZOX utilization. Furthermore, AZOX-AFS-Pec NPs enhanced fungicidal activity against rice sheath blight, with pot experiments revealing comparable control efficacy on rice sheath blight to AZOX suspension concentration (SC). Specifically, AZOX-AFS-Pec NPs exhibited superior prevention and prolonged protection against rice sheath blight compared to AZOX SC. Additionally, continuous release of Fe2+ and Fe3+ by AZOX-AFS-Pec NPs increased chlorophyll content and promoted rice growth. Moreover, these NPs increased salicylic acid (SA) levels in rice plants, fortifying disease resistance. Importantly, AZOX-AFS-Pec NPs demonstrated over a 2-fold reduction in acute toxicity to earthworms compared to AZOX SC. Therefore, stimuli-responsive AZOX-AFS-Pec NPs show great promise for enhancing pesticide effectiveness against pathogens, improving crop traits, and fortifying disease resistance.
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JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 35
·16583-16603
·
IF 3.5
Li Xiaoyan,Li Ming,Peng Wei,Li Chao,Yi Jialong,Zhao Longqi,Song Wenliang
Next-generation wearable electronics demand lightweight membranes integrated with multiple functionalities. Here, heterogeneous composite membranes of carbon nanotubes (CNTs) from vertical orientation to spreading are developed with a simple method to address this challenge. Magnetite (Fe 3 O 4 ) nanoparticles with polydopamine ligands were uniformly adsorbed on acidified CNTs, resulting in magnetic responsive CNTs. Applying a magnet above the filtration membrane yielded a freestanding CNT/Fe 3 O 4 heterogeneous membrane with an adaptive gradient structure of CNTs transitioning from vertically aligned to horizontally spread. The heterogeneous surfaces of the magnetically aligned CNT/Fe 3 O 4 composite membranes displayed distinct differences in water contact angle, electrical conductivity, and thermal conductivity. Based on the adaptive alignment of CNTs, the fabricated freestanding heterogeneous composite membranes exhibited remarkable Joule heating effect and enhanced electromagnetic shielding effect. Graphical abstract
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Journal of Water Process Engineering
·
2024
·
IF 6.3
Ding Chen,Chen He,Boxian Ren,Saiyue Yang,Yiman Ma,Zhiguo Lin,Xiangjun Yang
The chemical similarities and co-occurrence of phosphate and arsenate contamination have heightened the focus on their efficient simultaneous removal. In this study, magnetically recoverable La 2 O 2 CO 3 /Fe 3 O 4 nanosheets were synthesized through the calcination of La-Fe binary metal glycolate. Based on magnetic and adsorption properties, La 2 O 2 CO 3 /Fe 3 O 4 nanosheets with a La to Fe molar ratio of 1:1 (La 2 O 2 CO 3 /Fe 3 O 4 -1) were selected for further exploration. Electron microscopy characterization revealed that the nanocomposites consist of stacked La 2 O 2 CO 3 and Fe 3 O 4 nanosheets. The La 2 O 2 CO 3 /Fe 3 O 4 -1 nanocomposites exhibited exceptional adsorption capacities of 114.6 mg P/g and 230.2 mg As/g. Additionally, the material exhibited rapid adsorption kinetics and maintained excellent adsorption performance within a pH range of 3.0 to 9.0, showing significant selectivity for phosphate and arsenate even in the presence of various coexisting ions. Adsorption-desorption cycling tests indicated good potential for recycling. When applied to the spring water of Yangzonghai Lake, the material efficiently reduced the concentrations of phosphate and arsenate from 0.725 mg P/L and 1.380 mg As/L to below 0.020 mg P/L and 0.010 mg As/L, respectively. Mechanistic studies suggest that La 2 O 2 CO 3 facilitates the removal of phosphate and arsenate primarily through electrostatic attraction and ligand exchange. These findings indicate that La 2 O 2 CO 3 /Fe 3 O 4 holds significant promise for the co-removal of phosphate and arsenate, even at low concentrations.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2017
·
IF 2.714
Jiang-Bo Huo,Lei Xu,Jia-Cheng E. Yang,Hao-Jie Cui,Baoling Yuan,Ming-Lai Fu
Water stable Fe 3 O 4 @ZIF-8 composites were successfully fabricated by a facile modification. The composites were characterized by powder XRD, SEM, TEM and BET surface areas measurement. The results showed that as-obtained Fe 3 O 4 @ZIF-8 composites possess core-shell structures (Fe 3 O 4 as core and ZIF-8 as shell) with a high surface area (1133 m 2 g −1 ). The composites were also evaluated for adsorption of As(III) from solution. Langmuir model could be suitable to express the adsorption isotherm, indicating that the uptake of As(III) on Fe 3 O 4 @ZIF-8 is monolayer adsorption with maximum capacity being 100 m 2 g −1 . Thermodynamics data revealed that the adsorption followed a spontaneous, endothermic and entropy increase process. Batch adsorption experiments demonstrated that the adsorption kinetics fit pseudo-second-order better with correlation coefficient R 2 of 0.9881. The effects of anions such as chloride, nitrate, carbonate, phosphate and sulfate on the removal of As(III) were also examined. The results indicated that ordinary anions would not hinder adsorption of As(III) except that the carbonate and phosphate anions could compete with As(III) for adsorptive sites on the adsorbent. This research showed Fe 3 O 4 @ZIF-8 is a promising composite in practical application as it can be easily separated by magnetism after used in the water treatment with efficient removal of As(III) from aqueous solution.
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JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 53
·期 9
·6471-6481
·
IF 2.993
Yu Bing,Yang Bo,Li Guoling,Cong Hailin
This article presented a versatile and robust adsorbent with both magnetic property and high adsorption capacity on the basis of poly(glycidyl methacrylate)@Fe 3 O 4 @diazoresin (PGMA@Fe 3 O 4 @DR) magnetic microspheres. The morphology, composition and magnetic properties of the magnetic microspheres were characterized by scanning electron microscope, Fourier transform infrared spectroscopy, thermogravimetric analysis and the hysteresis loop measurements, respectively. The obtained microspheres were applied in the adsorption of dye in the wastewater. The effects of adsorption time, initial dye concentration, pH value and other conditions were explored. Results show that the magnetic microspheres were able to remove more than 98.5% of dyes in water under optimized conditions. The use of diazoresin not only protects the Fe 3 O 4 particles from being corroded at different pH values, but also greatly improves the adsorption capacity.
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SCIENCE OF THE TOTAL ENVIRONMENT
·
2024
·
IF 8.2
Lin Zhu,Wei Zeng,Yueqing Li,Yu Han,Jing Wei,Long Wu
In this work, on the basis of Fe 3 O 4 @Au-Pt nanozymes (MAP NZs) and aptamer recognition, a magnetic fluorescent aptasensor (MFA) was developed for sensitive and accurate detection of saxitoxin (STX). With the bridge of STX aptamer (Apt STX ) and complementary DNA (cDNA), Apt STX decorated MAP NZs (MAP/Apt) and cDNA modified green quantum dots (cDNA@g-QDs) were connected to form MAP/Apt-cDNA@g-QDs complex. As STX behaves a strong binding ability towards Apt STX , it will compete with cDNA and hybridize with Apt to release cDNA@g-QDs. With the addition of TMB, MAP will catalyze TMB to the oxidized TMB (ox-TMB), thereby quenching the fluorescence of g-QDs due to the inner filter effect. Based on this finding, the quantitative relationship between the change in fluorescence of gQDs and STX concentration was explored with a limit of detection (LOD, S/N = 3) of 0.6 nM. An internal standard signal of oxTMB was adopted and reduced the fluctuation of fluorescence signal output. Besides, the fluorescence probe can selectively recognize and detect STX among five marine toxins. Eventually, the MFA method behaved good performance in detecting seafood samples with recoveries of 82.0 % ∼ 102.6 % as well as coefficient of variations (CV) of 7.2 % ∼ 10.3 %. Therefore, the method with internal signal is hopeful to be a potential candidate for sensitive and accurate detection of STX in seafood.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Jie Yu,Dan Zhu,Cong Qi,Wenjie Zhang,Lin Liang
To improve the ability of the medium to capture solar energy, Ag@Fe 3 O 4 core-shell nanoparticles (NPs) were prepared in this paper. The influences of different preparation conditions on the particle structure and photo-thermal properties were investigated, and the growth and spectral absorption properties of Ag@Fe 3 O 4 NPs were analyzed. At the same time, nanoparticles-modified carbon membranes (NPCMs) were prepared by electrostatic adsorption method. The influences of radiation intensity and preparation concentration on photo-thermal properties were investigated, and the local evaporation mechanism of NPCMs was deeply explored. Experiments showed that changing the molar ratio of the precursor can effectively regulate the structure and optical properties of the NPs. The increase of the core radius of the NPs will increase the electric field strength ( E ) of the core surface and promote the absorption of light. Optimizing the temperature and heating time of the preparation process is very important for the successful realization of Fe 3 O 4 coated Ag, while deepening the coupling between plasmons on the surface of adjacent NPs. Compared with the intensity of 5 sun, the evaporation efficiency at 2 sun is increased by 13.37%. The local evaporation effect caused by NPCMs makes the system still have good evaporation efficiency at low radiation intensity.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Yujin Li,Mingzhu Qiu,Peiqing Guo,Xuefang Lei,Shaohui Li,Ran Meng,Nali Chen,Dongxia Zhang,Xibin Zhou
Hydrogen peroxide (H 2 O 2 ) is an environmentally friendly intermediate in the environmental field and also plays an important role in human metabolism, but the production and accumulation of excessive H 2 O 2 will cause harm to the human body, resulting in serious damage to cells. Therefore, N-doped graphene quantum dots Fe 3 O 4 /Co 3 O 4 nanoparticles with core-shell structure were prepared by in-situ synthesis and precipitation. The experimental results show that the prepared Co 3 O 4 nanoparticles have more efficient peroxidase activity than Co 3 O 4 nanoparticles alone. It can catalyze the oxidation of 3, 3, 5, 5-tetramethylbenzidine (TMB) to produce a blue product (TMBox) in the presence of H 2 O 2 . In addition, Co 3 O 4 with negative charge in the shell can produce a strong electrostatic driving coordination effect with positively charged TMB, which enhances the affinity between the nanoparticles and the substrate, and selectively catalyzes H 2 O 2 oxidation of colorless TMB to turn it blue. Based on these experimental results, a simple, low-cost, and efficient colorimetric method for H 2 O 2 detection was established, which showed a sensitive response to H 2 O 2 in the range of 0.02–2.5 μM with a detection limit of 2.3 nM. In addition, due to the magnetic properties of the prepared nanoparticles, they could be easily recovered by applying a magnetic field. This research provides a viable approach for magnetic nanomaterials with encouraging prospects for environmental monitoring, biosensing, and more.
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Polymers
·
2024
·Vol. 16
·期 8
·1160
·
IF 4.7
Ahmed Elhassan,Xiaoshuang Lv,Ibrahim Abdalla,Jianyong Yu,Zhaoling Li,Bin Ding
Ever-increasing electromagnetic pollution largely affects human health, sensitive electronic equipment, and even military security, but current strategies used for developing functional attenuation materials cannot be achieved in a facile and cost-effective way. Here, a unique core-shell-like composite was successfully synthesized by a simple chemical approach and a rapid microwave-assisted carbonization process. The obtained composites show exceptional electromagnetic wave absorption (EMWA) properties, including a wide effective absorption band (EAB) of 4.64 GHz and a minimum reflection loss (RLmin) of −26 dB at 1.6 mm. The excellent performance can be attributed to the synergistic effects of conductive loss, dielectric loss, magnetic loss, and multiple reflection loss within the graphene-based core–shell-like composite. This work demonstrates a convenient, rapid, eco-friendly, and cost-effective method for synthesizing high-performance microwave absorption materials (MAMs).
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Qingwei Li,Kai Nan,Wei Wang,Hao Zheng,Kaikai He,Yan Wang
Electromagnetic (EM) pollution can disrupt the functioning of advanced electronic devices, hence it’s necessary to design EM wave absorbers with high-level absorption capabilities. The Ti 3 C 2 T x (MXene) is classified as a potential EM absorbing material; nevertheless, the lack of magnetic loss mechanism leads to its inadequate EM absorbing performance. On this basis, a novel composite design with promising EM absorption properties is hypothesized to be the integration of few-layer MXene and heterogeneous magnetic MOF derivatives (Fe 3 O 4 /C) with complementary advantages. Herein, we synthesized two-dimensional (2D) interfacial-polarization-enhanced MXene hybrid (Fe 3 O 4 /C/MXene) by electrostatic assembly. It is notable that the interfacial polarization is realized by adding a small amount of magnetic Fe 3 O 4 /C. Furthermore, the Fe 3 O 4 /C/ MXene demonstrates an astonishing effective absorption bandwidth (EAB) of 10.7 GHz and an excellent EM wave absorption performance (RL min ) of −66.9 dB. Moreover, the radar cross section (RCS) of Fe 3 O 4 /C/MXene is lower than −15.1 dB m 2 from −90° to 90° with a minimum RCS value of −52.6 dB m 2 at 32°. In addition, the significant attenuation of the EM wave is due to the synergistic effect of improved impedance matching, dielectric loss, and magnetic loss. Thus, the magnetized Fe 3 O 4 /C/MXene hybrid is expected to emerge as a strong contender for high-performance EM wave absorbers.
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RSC Advances
·
2025
·Vol. 15
·期 7
·5507-5522
·
IF 4.6
Jingwen Chen,Shaobo Li,Bin Deng,Hongyuan Wang,Wenkui Sun,Li Li,Zongchun Bai,Jing Liu
Pathogenic bacterial infections represent a significant and ongoing threat to public health. The development of a sensitive, convenient, and accurate method for diagnosing pathogenic bacteria is a formidable challenge due to their low abundance in complex biological samples, especially in the early stages of diseases. In this study, a kind of phenylboronic acid-functionalized Fe3O4 nanoparticles (NPs), known as Fe3O4@poly(PEGDA-co-MAAPBA) NPs, was developed for effectively enriching low levels of pathogenic bacteria from complex samples and then diagnosing them through microbiological cultures. In this design, the resultant Fe3O4@poly(PEGDA-co-MAAPBA) NPs could recognize pathogenic bacteria because of the reversible reactions between the phenylboronic acid groups on the NPs and the cis-diol structures outside of the bacterial cells. By exploiting the magnetic properties of Fe3O4 NPs, bacteria were able to anchored onto the resulting NPs (NPs@bacteria) for easy enrichment. Utilizing microbiological culture techniques, successful cultivation of NPs@bacteria was achieved, demonstrating that bacterial activity remained unaffected during the enrichment process. The proposed method exhibited a limit of detection as low as 0.4 colony-forming units per milliliter. The Fe3O4@poly(PEGDA-co-MAAPBA) NPs were applied successfully for testing Staphylococcus aureus in urine samples which were typically considered to be free of bacterial contamination, indicating excellent selectivity and enrichment capability of the prepared NPs in complex samples. It suggests that the Fe3O4@poly(PEGDA-co-MAAPBA) NPs have the potential to become a powerful tool for early diagnosis of pathogenic bacteria in the clinic.
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