APPLIED CATALYSIS B-ENVIRONMENTAL
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2016
·
IF 8.328
Dan Du,Wen Shi,Lingzhi Wang,Jinlong Zhang
Herein, we demonstrate the yolk-shell structured Fe 3 O 4 @void@TiO 2 sphere as an efficient heterogeneous catalyst for the photo-Fenton-like degradation of tetracycline (TC). The composite was synthesized by first successively coating amorphous SiO 2 and TiO 2 shells around a Fe 3 O 4 core via the sol-gel strategy to form Fe 3 O 4 @SiO 2 @TiO 2 , then crystallizing TiO 2 and removing SiO 2 through calcination and the ultrasonic ammonia-etching treatment, respectively. The particles are monodisperse and uniform in size (ca. 180 nm), where the diameter of the core is ca. 100 nm and the thickness of the shell is ca. 10 nm. This composite possesses anatase TiO 2 shell with high crystallinity, superparamagnetic core with a saturation magnetization value of 28.71 emu/g and high specific surface area of 101 m 2 g −1 . It shows extremely high activity towards the degradation of TC (40 mg/L) in a wide pH range as demonstrated by almost 100% elimination efficiency at pH = 3 and ca. 75% at pH = 9 within 6 min. Moreover, benefitting from the superparamagnetism of the core, this composite could be magnetically recovered and reapplied in the TC degradation without significant loss of activity after 5 recycling (ca. 10%). The degradation curve can be well fitted by pseudo-first order model, where a kinetic constant of 0.51 min −1 is achieved, much higher than those of Fe 3 O 4 @TiO 2 (0.24 min −1 ), hollow TiO 2 (0.17 min −1 ), Fe 3 O 4 @SiO 2 @TiO 2 (0.14 min −1 ) and Fe 3 O 4 (0.11 min −1 ). The high activity is attributed to the efficient enrichment and confinement of reactants (TC and hydroxyl radicals) in the nanocavity of the yolk-shell structure, and the efficient reduction of Fe 3+ to Fe 2+ by the photo-generated electrons from the TiO 2 shell.
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高影响因子
MRS Energy & Sustainability
·
2024
·
IF 3.3
Oubla M’hamed,Idrissi Siham,Edfouf Zineb,Dinia Selma,Elouadi Brahim
Abstract The growing request of enhanced lithium-ion battery (LIB) anodes performance has driven extensive research into transition metal oxide nanoparticles, notably Fe 3 O 4 . However, the real application of Fe 3 O 4 is restricted by a significant fading capacity during the first cycle, presenting a prominent challenge. In response to this obstacle, the current research centers on the development of Fe 3 O4@rGO (with rGO is reduced graphene oxide) nanocomposite through a new two-step soft sol–gel method, incorporating a slight proportion of rGO. This targeted approach aims to resolve issues linked to the electrochemical stability of Fe 3 O 4 anode. The structure and morphological characterizations techniques confirmed the spinel crystalline structure of Fe 3 O 4 as well as the distinctive aggregate morphology of the nanoparticles, highlighting a regular arrangement of rGO-coated nanoparticles. The lithium-ion storage properties of the Fe 3 O 4 @rGO anode were examined through exhaustive electrochemical analyses. A minor irreversible capacity stands out as a particularly noteworthy feature in the Fe 3 O 4 @rGO anode. This characteristic is of paramount interest, given that the anode exhibits high specific capacity along with a high cycling stability and an outstanding rate capability. These remarkable outcomes can be directly linked to the superior morphological characteristics attained through the two-step sol–gel method. Graphical Abstract
Highlights
The Fe 3 O 4 @rGO nanocomposite, resulting from a novel two-step mild sol–gel method, exhibits a unique and promising structure for LIB technologies.
Regarding storage performance as an anode, the prepared nanocomposite exhibited a minor irreversible capacity, high reversible capacity, as well as good coulombic efficiency.
The incorporation of rGO improved the electrical conductivity and played a crucial role in facilitating Li-ion diffusion, overcoming challenges associated with volume changes during the cycling process.
Discussion
Transition metal oxide (TMO)-based anodes hold promise for future LIB technologies owing to their substantial theoretical capacities. However, the material’s tendency to expand dramatically during use, leading to electrode deterioration and capacity fade. To address this challenge, researchers have explored incorporating rGO into TMO composites.
rGO’s unique properties, including high conductivity and mechanical flexibility, effectively mitigate volume expansion and enhance electrochemical performance. The two-step soft sol–gel method could be a promising solution for fabricating rGO-TMO nanocomposites. However, further optimization and large-scale fabrication are necessary for practical applications.
Despite these challenges, the combination of TMOs and rGO could create high-performance and durable anodes for LIB. Further research should focus on optimizing material composition and fabrication processes to realize the full potential of this technology.
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CARBON
·
2024
·
IF 10.5
Huiliang Wen,Wei Xu,Sen Lin,Aiguo Guan,Yingna Zhang,Xin Li,Chongbo Liu
As a representative magnetic oxide absorber, Fe 3 O 4 has attracted considerable research attention owing to its remarkable magnetic saturation strength as well as semiconducting properties. Doping Fe 3 O 4 with La 3+ leads to 3d-4f magnetic coupling and ion distribution changes due to the unique electron configuration and large ionic radius of La 3+ , thereby greatly enhancing the magnetic performance. However, high density, low dielectric loss, and low permeability at high frequencies inhibit the electromagnetic wave absorption (EMWA) performance of ferrites. In this study, stick-shaped Sn metal-organic framework (MOF) is in-situ grown on La 3+ -doped Fe 3 O 4 using a surfactant. After high-temperature annealing, the SnO 2 /porous carbon composites derived from Sn-MOF wrap the ferrite, forming a core-shell heterostructure, which not only prevents oxidation but also enhances the EMWA performance. Among the prepared La x Fe 3-x O 4 /SnO 2 /C (LFSC) samples, LFSC-2 (with La x Fe 3-x O 4 to Sn-MOF ratio of 1:2) exhibits strong absorption performance with a minimum reflection loss ( RL min ) of −44.1 dB. Furthermore, the gradient metamaterial based on LFSC-3 shows ultra-broadband EMWA with an effective absorption bandwidth ( RL min ≤ −10 dB) of 13.17 GHz. In addition, the LFSC-2 sample demonstrates excellent radar stealth capability in the radar cross section (RCS) far-field response, achieving an RCS reduction value of 20.4 dB∙m 2 .
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Journal of the Taiwan Institute of Chemical Engineers
·
2025
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IF 6.3
Yuemin Guang,Ruochen Yuan,Bingjie Zhang,Dingqi Li,Ju Yang,Najun Liu,Yongheng Yin
Background Nanofiltration membranes are widely used for treating dye wastewater, while two major challenges hinder their application: the trade-off between permeance and selectivity, and membrane fouling. Methods Covalent organic frameworks (COFs) can help membranes overcome the trade-off effect, and the combination of positively and negatively charged groups exhibit excellent antifouling properties. In this study, COF-coated Fe 3 O 4 particles are synthesized and functionalized with sulfonic acid groups, through magnetically induced surface segregation, a membrane with asymmetric structure is formed. The effects of modified particles on the membrane's structure are systematically investigated. Most importantly, the water permeance, dye rejection, and antifouling properties of as-prepared mixed matrix membranes are thoroughly evaluated. Significant Findings The magnetic-assisted method enriches more COFs containing both positively and negatively charged groups on the membrane surface, as a result, the prepared membranes exhibit outstanding performance in water permeance, dye removal and antifouling ability. For example, the P/Z-COF-5 membrane shows enhanced permeance from 65.2 L m −2 h −1 bar −1 (polyethersulfone, PES) to 165.6 L m −2 h −1 bar −1 , exhibits high rejection of 99.8 % for Eriochrome black T and 96.7 % for Congo red. In addition, the flux recovery ratio of P/Z-COF-5 membrane is 98.2 %, much higher than that of pristine PES (72.9 %).
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TALANTA
·
2017
·
IF 4.162
Xue Qian Tang,Yi Dan Zhang,Zhong Wei Jiang,Dong Mei Wang,Cheng Zhi Huang,Yuan Fang Li
In this work, Fe 3 O 4 and metal–organic framework MIL-101(Fe) composites (Fe 3 O 4 /MIL-101(Fe)) was demonstrated to possess excellent catalytic property to directly catalyze luminol chemiluminescence without extra oxidants. We utilized Fe 3 O 4 /MIL-101(Fe) to develop a ultra-sensitive quantitative analytical method for H 2 O 2 and glucose. The possible mechanism of the chemiluminescence reaction had been investigated. Under optimal conditions, the relative chemiluminescence intensity was linearly proportional to the logarithm of H 2 O 2 concentration in the range of 5–150 nM with a limit of detection of 3.7 nM (signal-to-noise ratio = 3), and glucose could be linearly detected in the range from 5 to 100 nM and the detection limit was 4.9 nM (signal-to-noise ratio = 3). Furthermore, the present approach was successfully applied to quantitative determination of H 2 O 2 in medical disinfectant and glucose in human serum samples.
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PubMed
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
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2017
·Vol. 21
·期 11
·3071-3082
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IF 2.316
Liu Xin,Zhong Ji,Rao Hanbing,Lu Zhiwei,Ge Hongwei,Chen Bingyao,Zou Ping,Wang Xianxiang,He Hua,Zeng Xianyin,Wang Yanying
A novel molecularly imprinted electrochemical sensor based on Fe 3 O 4 @Au nanoparticles immobilized on amine-multi-walled carbon nanotubes by the strong chemisorption had been developed for detecting dipyridamole (DIP) in human serum using precipitation polymerization method. DIP can be detected by this electrochemical sensor through the response current change before and after binding DIP with the formation of hydrogen bonds. The experimental binding data for this study was modeled with the Freundlich isotherm (FI) equation, demonstrating the high imprinting efficiency. The molecularly imprinted electrochemical sensor based on Fe 3 O 4 @Au-MWCNT nanocomposite amplifies the response current in differential pulse voltammetry measurement, allowing the detection limit reaching 0.03 ng mL −1 in a wide linear range from 0.5 to 1900 ng mL −1 , which is remarkably better than those of currently used methods and the previous reports. Moreover, this molecularly imprinted electrochemical sensor has first been developed for the detection of DIP based on the Fe 3 O 4 @Au-MWCNT composite, which has a promising potential in the detection of DIP in human serum which enables low-cost, effective, and sensitive determination.
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NEW JOURNAL OF CHEMISTRY
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2017
·Vol. 41
·期 9
·3308-3319
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IF 3.269
Qiang Jia,Yinxian Peng,Jianming Pan,Xiaobin Huang,Xiangheng Niu,Tao Zhang
Magnetic microspheres (Fe3O4@PVIM@Zn(II)) composed of a high magnetic-response Fe3O4 core and a Zn(II)-immobilized cross-linked polyvinyl imidazole (PVIM) shell via reflux-precipitation polymerization and metal-ion affinity strategy were fabricated. Integrating the advantages of specific uptake and fast separation, Fe3O4@PVIM@Zn(II) was adopted as an ideal pathway for luteolin (LTL) recognition. As-prepared Fe3O4@PVIM@Zn(II) possessed core–shell structure, uniform size (200 nm), high magnetic responsiveness (32.6 emu g−1), and a very easy synthesis process. X-ray photoelectron spectroscopy (XPS) suggested a strong interaction between the nitrogen heterocyclic ring of PVIM and Zn(II), which produced abundant binding sites for LTL. The batch mode experiments can be well described by pseudo-first-order kinetic models and a Langmuir isotherm. A rapid binding equilibrium (within 45 min) and large monolayer adsorption capacity (23.92 mg g−1) at 298 K were also observed. In addition, Fe3O4@PVIM@Zn(II) displayed remarkable selectivity to LTL; the purification process using Fe3O4@PVIM@Zn(II) can make purified LTL from approximately 85% to 94.26%. The antibacterial activity of purified LTL was outstanding by means of a Staphylococcus aureus (ATCC29213) resistance experiment. Considering its multiple merits, Fe3O4@PVIM@Zn(II) exhibited great potential for specific binding with natural products, such as flavonoids.
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ACS Biomaterials Science & Engineering
·
2024
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IF 5.4
Shichao Zhang,Yijiang Liu,Yuhan Xie,Chenchun Ding,Renjie Zuo,Zhenzhen Guo,Shiyong Qi,Tingting Fu,Weibin Chen
Breast cancer represents a substantial contributor to mortality rates among women with cancer. Chemical dynamic therapy is a promising anticancer strategy that utilizes the Fenton reaction to transform naturally occurring hydrogen peroxide (H2O2) into hydroxyl radicals (•OH). Additionally, cancer immunotherapy using immune drugs, such as imiquimod (R837), has shown promise in activating T cells to kill tumor cells. In this study, we proposed a Fe3O4@R837 smart nanoplatform that can trigger the Fenton reaction and induce immune responses in breast cancer treatment. Furthermore, we performed transcriptome sequencing on breast cancer samples and used the R package (limma) to analyze differential expression profiles and select differentially expressed genes (DEGs). We obtained clinical information and RNA expression matrix data from The Cancer Genome Atlas database to perform survival analysis and identify prognostic-related genes (PRGs) and molecular subtypes with distinct prognoses. We used the TIMER 2.0 web and other methods to determine the tumor immune microenvironment and immune status of different prognostic subtypes. We identified DPGs by taking the intersection of DEGs and PRGs and performed functional analyses, including gene ontology and Kyoto Encyclopedia of Genes and Genomes enrichment analysis, to elucidate potential mechanisms. Subsequently, we constructed a protein–protein interaction network using the STRING database to visualize the interactions between the DPGs. We screened hub genes from the DPGs using the Cytoscape plugin and identified six hub genes: CD3E, GZMK, CD27, SH2D1A, ZAP70, and TIGIT. Our results indicate that these six key genes regulate immune cell recruitment to increase T-cell cytotoxicity and kill tumors. Targeting these key genes can enhance immunotherapy and improve the breast cancer prognosis.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
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IF 9
Lixiao Bi,Shiji Jia,Wenshuang Zhang,Yikun Zhu,Yiwei Gao,Chongbin Wang,Yuanyuan Feng
Inserting metal–organic frameworks into polymer matrix to prepare mixed matrix membranes (MMMs) is a promise strategy for the preparation of organic solvent nanofiltration (OSN) membranes. However, MMMs prepared via traditional physical blending strategy exhibits the disadvantage of uneven dispersion of MOFs particles, resulting in a decrease in organic solvent resistance and membrane performances. In this work, the magnetically responsive nanomaterials (Fe 3 O 4 @ZIF8) were successfully prepared via growing ZIF8 functional layer upon Fe 3 O 4 nanoparticles. Then, the OSN membranes were fabricated via embedding the Fe 3 O 4 @ZIF8 into polymer matrix under a magnetic condition during non-solvent induced phase separation. The magnetically responsive Fe 3 O 4 @ZIF8 particles were compelled to segregate and enrich in membrane surface, optimizing the arrangement of Fe 3 O 4 @ZIF8 within the membrane. This strategic modification significantly improves the porosity and solvent resistance property of membrane. The optimized M−Fe 3 O 4 @ZIF8(0.3)/PAN membrane exhibited an increased permeance of methanol from 40.5 m -2 h −1 bar −1 to 55.5 m -2 h −1 bar −1 compared to the pristine PAN membrane while the retention to Congo Red increased above 99 %. The M−Fe 3 O 4 @ZIF8(0.3)/PAN membrane also possesses excellent permeation of organic solvent and a selectivity (NaCl/Congo Red) of 232, which makes these MMMs promising for salt/dye separation in organic solvent nanofiltration.
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BIOMATERIALS
·
2024
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IF 12.8
Yiqun Zhang,Ni Zhang,Jianghao Xing,Yiwei Sun,Xu Jin,Cailiang Shen,Liang Cheng,Yuanyin Wang,Xianwen Wang
Chemodynamic therapy (CDT) involving the use of metal nanozymes presents new opportunities for the treatment of deep-seated tumors. However, the lower ROS catalytic rate and dependence on high H 2 O 2 concentrations affect therapeutic efficacy. To address this issue, a hydrogel was constructed for the treatment of osteosarcoma by combining Cu–Fe 3 O 4 nanozymes (NCs) and artemisinin (AS) coencapsulated in situ with sodium alginate (ALG) and calcium ions. This hydrogel can release nanoparticles and AS within tumor tissue for an extended period of time, utilizing the multienzyme activity of NCs to achieve ROS accumulation. The carbon radicals (•C) generated from the interaction of Fe 2+ /Cu 2+ with AS amplify oxidative stress, leading to tumor cell damage. Simultaneously, the NCs activate ferroptosis via the GPX4 pathway by depleting GSH and activate cuproptosis via the DLAT pathway by causing intracellular copper overload, enhancing therapeutic efficacy. In vitro experiments confirmed that the NCs-AS-ALG hydrogel has an excellent tumor cell killing effect, while in vivo experimental results demonstrated that it can effectively eliminate tumors with excellent biocompatibility , providing a new approach for osteosarcoma treatment.
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Materials Today Communications
·
2024
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IF 3.7
Xuyan Yue,Meichen Liu,Yanzhi Xia,Zhong Xiong
Nanocomposite hydrogels enable augmented properties, functions, and responsive behaviors. In the field of stereolithography 3D printing of the photothermal responsive nanocomposite hydrogel, the influence of the size of nano-Fe 3 O 4 on 3D printing properties is significant due to the sedimentation, but the relevant research is rare. In this study, for the fabrication of photothermal responsive hybrid hydrogel, poly( N -isopropylacrylamide-acrylamide)/nano-Fe 3 O 4 [P(NIPAM-AM)/nano-Fe 3 O 4 ] gel photoresist was prepared and digital light processing (DLP)-based 3D printing as one of the popular stereolithography 3D printing technology was utilized. The influences of two sizes of Fe 3 O 4 nanoparticles (10 and 50 nm) denoted as nano-Fe 3 O 4 (10) and nano-Fe 3 O 4 (50) on DLP 3D printing properties of the gel photoresist were investigated in detail. The results reveal that the gel photoresist with nano-Fe 3 O 4 (10) obtained long exposure time for the basic prototype, low overcuring degree ( O d ), and good uniformity of nanoparticles in hybrid hydrogels, while those with nano-Fe 3 O 4 (50) had the merits of printing high 3D sample due to the low release fore. Unfortunately, the gel photoresist with a high content of nano-Fe 3 O 4 such as 3.11 wt% failed in 3D printing of a high and uniform gel cylinder. A strategy of preparing P(NIPAM-AM)/nano-Fe 3 O 4 gel photoresist with mixed nano-Fe 3 O 4 (10) and (50) for 3D printing was proposed. Using the gel photoresist (nano-Fe 3 O 4 content: 3.11 wt%) with two sizes of nano-Fe 3 O 4 mixed with 50% each and the exposure time of 8 s, a gel cylinder with a height of 1 cm was successfully printed with uniform nano-Fe 3 O 4 distribution and low O d values (≤ 1.17%). Further, a biomimetic hydrogel octopus was 3D printed by using the gel photoresist with mixed nano-Fe 3 O 4 and thereafter a near-infrared-light-driven waving motion of octopus tentacle was achieved successfully.
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Journal of Materials Chemistry A
·
2025
·
IF 9.5
Fuping Bian,Jiyan Wei,Xinxin Cai,Jiwen Hu,Shudong Lin
Due to the rapid growth in the miniaturization, portability, and flexibility of electronic devices, the demand for polymer composites with high thermal conductivity and electromagnetic shielding properties has increased significantly. Herein, we present a multifunctional thin film with a Janus-like structure that simultaneously enhances conductivity and electromagnetic interference shielding effectiveness. Owing to the unique Janus-like structure, heating performance tests show that the composite film has a high Joule heating temperature of 129.4 °C at a low supply voltage of 3.0 V, a fast response time of less than 12 seconds, and excellent sensitivity, heating stability and reliability. In addition, the electromagnetic interference shielding effectiveness of AgNWs-Fe3O4/ANF can reach 80.0 dB at 8.5 GHz. This excellent performance of this multifunctional bilayer composite film demonstrates its potential for advanced electronic applications such as wearable devices, artificial intelligence and high-performance heating devices.
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危险品化学品经营许可证（带存储）