MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 6
·1-11
·
IF 5.3
Zhang Xingping,Feng Yujun,Chen Xiaowei,Wang Yuanyuan,Guo Yingli,Yang Xin,Yang Hualin
A sensitive fluorescence and colorimetric dual-mode detection method based on Eu 3+ and Fe 3 O 4 @MoS 2 nanocomposites was constructed. In this technique, tetracycline antibiotics (TCs) chelated with Eu 3+ to form a Eu 3+ -TCs complex which emits red fluorescence at 620 nm through the antenna effect. At the same time, Eu 3+ -TCs complex enhances the peroxidase-like activity of Fe 3 O 4 @MoS 2 to catalyze the oxidation of 3,3’,5,5’-tetramethylbenzidine (TMB) that can produce a colorimetric signal. This proposed strategy has been used to detect three antibiotics including oxytetracycline (OTC), tetracycline (TC), and chlortetracycline hydrochloride (HCl-CTC). The linear ranges of the new assay for OTC, TC, and HCl-CTC were 0.1–25 μM, 0.5–25 μM, and 0.05–5 μM with the detection limits of 0.016 μM, 0.039 μM, and 0.036 μM, respectively. Meanwhile, this new method was fast and convenient which can complete the detection in 22 min. The assay has been effectively applied to TCs detection in tap water, lake water and honey with satisfactory recoveries of 90.55–109.86%. Graphical
✓ 已验证
产品关联
DOI
PubMed
高影响因子
3 Biotech
·
2021
·Vol. 11
·期 6
·1-14
·
IF 2.406
Appu Manikandan,Lian Zhifeng,Zhao Dengqi,Huang Jianying
In this study, we prepared chitosan (CS)-coated iron oxide (Fe 3 O 4 ) nanocomposites (NCs) by employing the aqueous leaf extract of Brassica oleracea L. and evaluated its antimicrobial potential. The characterization of hybrid CS-Fe 3 O 4 NCs was performed using Fourier-transform infrared spectroscopy (FTIR) analysis to evaluate the chemical bonding of chitosan to nanoparticles (NPs). X-ray photoelectron spectroscopy (XPS) studies revealed the presence of oxidation state elements Fe 2p, O 1s, N 1s, and C 1s, and the zeta potential analysis was found to have well-colloidal stability (+ 76.9 mV) of NCs. Transmission electron microscopy (TEM) analysis determined that CS-Fe 3 O 4 NCs were spherical with an average particle size of 27 nm. The X-ray diffractometer (XRD) spectrum ascertained the crystallinity of the hybrid NCs and the vibrating sample magnetometer (VSM) inferred the ferromagnetic behavior of the synthesized NCs. Furthermore, the significant antibacterial efficacy of NPs was demonstrated against foodborne bacterial pathogens, such as Staphylococcus aureus ( S. aureus ) and Escherichia coli ( E. coli ), and the highest zone of inhibition was observed to be 11.5 mm and 13.5 mm in CS-Fe 3 O 4 NCs, respectively. In comparison with Fe 3 O 4 NPs, synergistic impacts of CS-Fe 3 O 4 NCs displayed great antibacterial potential as exhibited by a clearly enlarged zone. Thus, CS-Fe 3 O 4 NCs could be used as efficacious antimicrobial agents in food packaging and food preservation fields.
✓ 已验证
DOI
PubMed
高影响因子
COMPOSITES PART B-ENGINEERING
·
2021
·
IF 9.078
Yang Zhan,Shao-hua Luo,Jian Feng,Lin Zhang,Xin Liu,Qing Wang,Ya-hui Zhang
The lithium-oxygen batteries (LOBs) have gained extensive interest in the past decade, but are plagued by slow reaction kinetics and induced large-voltage hysteresis. Therefore, developing extremely capable catalysts to enhance catalytic behavior and mitigate oxidation-reduction overpotential of LOBs is of huge challenge and significance. Attributable to their economically friendly and great activity, transition metal oxides (TMO) have incurred lots of attention as alternative electrocatalysts to replace the currently used noble metal-based catalysts. In this work, we fabricate a highly efficient TMO (the MIL-88A heated at 500 °C under protective flow, M8-Fe 3 O 4 @NC-500) electrocatalyst as advanced cathodes, which attributed to its unique structure, numerous dendritic-shaped carbon layer was anchored inplane into the micrometer-long spindle-shaped prisms with evenly distribution and contains abundant Fe–N/Graphitic N active sites. Therefore, the LOBs (based on M8-Fe 3 O 4 @NC-500/AB cathode) deliver superior electrochemical performance with large specific capacities of 14866.1 mAh g −1 , low overpotentials (1.31 V), and steady cycling stability (553 cycles, limited 500 mAh g −1 , under 0.05 mA cm −2 ). Our work provides a novel vision to rationally design and synthesize a powerful TMO electrocatalyst (with the 2D carbon nanosheet coating) for the LOBs cathode.
✓ 已验证
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 63
·39804-39812
·
IF 3.361
Xiaoyu Wang,Qing Ma,Chaochao Wen,Tao Gong,Jing Li,Wenting Liang,Meining Li,Yuyao Wang,Rui Guo
The novel nano-drug carrier (FDCA-FA-MNPs) was constructed by grafting formyl deoxycholic acid (FDCA) and folic acid (FA) on the surface of Fe3O4 magnetic nanoparticles (MNPs), possessing the advantages of superparamagnetism, good stability, low cytotoxicity and good blood compatibility. The hydrophobic anti-cancer drug doxorubicin hydrochloride (DOX) was successfully loaded onto FDCA-FA-MNPs through supramolecular interactions (hydrogen bond between FDCA and drug and hydrophobic interaction and π–π stacking between drug and drug). The drug loading amount and drug loading capacity were 509.1 mg g−1 and 33.73 wt%, respectively. In addition, drug release had a pH responsive and controllable release performance, the release rate at pH 5.3 (45.6%) was four times that at pH 7.4 (11.5%), and the tumor microenvironment was favorable for drug release. More importantly, the novel nano-drug carrier combined the hepatocellular targeting of FDCA, the cancer cell targeting of FA, and the magnetic targeting of Fe3O4, showing excellent cancer-killing efficiency (78%) in vitro. Therefore, the nano-drug carrier synthesized in this paper has potential practical application value in the targeted therapy of liver cancer.
✓ 已验证
DOI
PubMed
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2022
·
IF 5.723
Kunpeng Song,Wen Dong,Cheng Tang,Zhijuan Zou,Yundang Wu
In this study, a novel and highly efficient ORR catalyst is designed via the pyrolysis of zeolitic imidazole framework-8 (ZIF-8) under the protection of hypercrosslinked iron porphyrins . Fe 3 O 4 nanoparticles with oxygen vacancies are formed in situ and promoting catalytic efficiency. Benefiting from the synergistic effect among the Fe 3 O 4 and ZIF-8 skeleton, the hybrid catalyst exhibits excellent ORR activity even surpassing commercial Pt/C. The pyrolyzation temperature is studied in detail and determined to be a crucial parameter for ORR performance. Nano-Fe 3 O 4 , which has high catalytic efficiency, is formed in situ at 800 ℃. Amorphous iron is formed at 600 ℃ and 700 ℃, and zero-valent iron is formed at 900 ℃. The content of oxygen vacancies, Fe–N, and graphite–N, which are beneficial to the ORR reaction, are all reached to a maximum at 800 ℃. This study provides a new approach to design highly active Fe 3 O 4 -based electrocatalytic materials.
✓ 已验证
DOI
高影响因子
CHINESE SCIENCE BULLETIN
·
2014
·Vol. 59
·期 17
·2017-2023
·
IF 1.365
Ma Delong,Yuan Shuang,Cao Zhanyi
Fe 3 O 4 is an attractive conversion reaction-based anode material with high theoretical capacity (928 mA h g −1 ). However, the poor cycling and rate performance hinder its applications in Li-ion batteries. In this work, we report an effective strategy to synthesize three-dimensionally macroporous graphene-supported Fe 3 O 4 hybrid composite. Benefiting from advantage of the special structure, the hybrid composite exhibits excellent Li + storage performance, delivering a high reversible capacity of 980 mA h g −1 at the current density of 4 A g −1 even after 470 cycles and ultrahigh rate capability (293 mA h g −1 even at current density of 20 A g −1 ).
✓ 已验证
DOI
高影响因子
Molecular Catalysis
·
2021
·
IF 5.062
Bowei Shen,Farong Zhang,Mengqi Zhao,Zhiquan Pan,Qingrong Cheng,Hong Zhou
The magnetic solid acid, Fe 3 O 4 @PEI@SO 3 H, was synthesized and used as a catalyst to transfer steroid saponins into diosgenin in an alcoholysis approach. The results showed that the magnetic solid acid greatly improved the alcoholysis efficiency for extraction diosgenin from steriod saponins. To optimize the parameters for alcoholysis, such as the mass of the solid acid, solvent volume, the reaction temperature and time, single factor experiments as well as response surface experiment have been performed. Under the optimal conditions, the diosgenin yield obtained by alcoholysis is higher than that of the traditional inorganic acid hydrolysis. And it worth to mention that no waste liquid is discharged. The catalyst is very stable and can be used for three times without obvious mass loss and activity decrease, indicating that the technology of extracting diosgenin from Dioscorea zingiberensis C.H. Wright tuber has a broad prospect in industrial application.
✓ 已验证
DOI
高影响因子
FOOD CHEMISTRY
·
2021
·
IF 7.514
Junxin Zhao,Maomao Ma,Xianghui Yan,Dongman Wan,Zheling Zeng,Ping Yu,Deming Gong
The lipase from Bacillus licheniformis NCU CS-5 was immobilized onto β -cyclodextrin (CD) grafted and aminopropyl-functionalized chitosan-coated Fe 3 O 4 magnetic nanocomposites (Fe 3 O 4 -CTS-APTES-GA- β -CD). Fourier transform infrared spectroscopy, thermogravimetry analysis, X-ray diffraction, scanning electron microscopy and transmission electron microscopy showed that not only the functionalized magnetic nanoparticles were synthesized but also the immobilized lipase was successfully produced. The immobilized lipase exhibited higher optimal pH value (10.5) and temperature (60℃) than the free lipase. The pH and thermal stabilities of the immobilized lipase were improved significantly compared to the free lipase. The immobilized lipase remained more than 80% of the relative activity at temperature of 60 ℃ and pH 12.0. The immobilized lipase also remained over 80% of its relative activity after 28 days of storage and 15 cycles of application. The application of the immobilized lipase in esterification of isoamyl acetate and pentyl valerate showed that maximum esterification efficiency was achieved in n -hexane having 68.0% and 89.2% respectively. Therefore, these results indicated that the Fe 3 O 4 -CTS-APTES-GA- β -CD nanoparticles are novel carriers for immobilizing enzyme, and the immobilized lipase can be used as an innovative green approach to the synthesis of fruity flavor esters in food industry.
✓ 已验证
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2018
·
IF 6.14
Guohua Zhu,Kui Wu,Liang Tan,Weiyan Wang,Yanping Huang,Diyu Liu,Yunquan Yang
Magnetic colloidal sol was first prepared and added in the mixed solution of Ni(NO3)2 and Al(NO3)3. After the constant-pH coprecipitation and calcination, magnetic NiO–Al2O3@Fe3O4 mixed oxides were formed and used as supports for Pt-based catalysts. The activities of these magnetic Pt/NiO–Al2O3@Fe3O4 catalysts were tested in the hydrodeoxygenation (HDO) of phenols such as 4-ethylphenol, 4-methylphenol, and guaiacol. These exhibited high HDO activity, and aromatic hydrocarbons were produced through a coupling process of hydrodeoxygenation and dehydrogenation. The addition of Fe enhanced both the conversion and aromatic hydrocarbons selectivity, which was attributed to the electron transfer between metallic Pt and Fe. For example, after the liquid phase HDO of 4-ethylphenol at 300 °C and 2.0 MPa for 1.5 h, 97.9% conversion and 18.3% toluene selectivity were obtained. When the reaction time was prolonged to 8 h, ethylbenzene selectivity increased to 88.0%. Moreover, these Pt/NiO–Al2O3@Fe3O4 catalysts were easily recycled from the liquid reaction mixture by employing an external magnet, but the dehydrogenation stability needs to be further improved.
✓ 已验证
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2019
·
IF 6.282
Haoran Cheng,Shengnan Wei,Youxin Ji,Jinsheng Zhai,Xiaoli Zhang,Jingbo Chen,Changyu Shen
Flexible Poly (vinylidene fluoride) (PVDF)/Fe 3 O 4 /carbon films were prepared through the solution processing and compression molding method. The electrical conductivity and the electromagnetic interference (EMI) shielding properties of these composites were gradually increased with the increasing of CNTs or GNPs content, as well as the film thickness. Total shielding of the 8 wt% CNTs (Carbon Nanotubes) and GNPs (Graphenes) filled PVDF/Fe 3 O 4 composites increased from 14.1 to 32.7 dB, and 16.2 to 35.6 dB, while the film thickness was increased from 0.5 to 1.1 mm, respectively. Due to the synergetic effect of Fe 3 O 4 nanoparticles and CNTs or GNPs, the final EMI shielding of the composites could be mainly attributed to the absorption process. Moreover, the fabricated films possess higher thermal conductivities , which can convert microwave energy into Joule heating systems. These functional films have the potential usage in making high-efficiency EMI shielding devices with rapid heat dissipation.
✓ 已验证
DOI
高影响因子
IONICS
·
2026
·
IF 3.4
Luo Zhangyang,Yuan Mao,Zhao Peng,Yang Xulin,Zhang Qian
Electrochemical water electrolysis has become a prominent strategy to produce H2 and O2 from renewable sources. Herein, the unique CeO2/Fe3O4-0.2 composite with spindle morphology was synthesized through a hydrothermal and high-temperature calcination method. The CeO2 exhibit a variable chemical valence of Ce4+/Ce3+ and generate much oxygen vacancies through redox reactions. The synergy effect between Fe3O4 and CeO2 leads to increase the number of active sites, accelerate the charge transfer process, and enhance the interface between the electrode and electrolyte. The CeO2/Fe3O4-0.2 displays a low overpotential of 305 mV for oxygen evolution reaction (OER) and 73 mV for the hydrogen evolution reaction (HER) at 10 mA cm-2 in 1 M KOH. Additionally, this composite catalyst exhibits outstanding durability and only a slight potential change observed over 100 h for OER. The cell voltage of electrolysis electrolyzer using CeO2/Fe3O4-0.2 as both anode and cathode is 1.56 V to drive 10 mA cm-2. This research effort delivers a complete advantage for the development of cost-effective and highly active bifunctional catalysts for overall water splitting.
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Fanyu Kong,Xiaodong He,Qianqian Liu,Xinxin Qi,Dongdong Sun,Yongting Zheng,Rongguo Wang,Yuelei Bai
Herein, a new nanocomposite was synthesized via in-situ growth of Fe 3 O 4 nanoparticles on MXene Ti 3 C 2 multilayer to improve the electrochemical performance of anodes by integrating the merits of transition metal oxide and Ti 3 C 2 , where further surface modification of Fe 3 O 4 @Ti 3 C 2 nanocomposites by carbon coating was introduced here. The nanocomposites exhibited excellent electrochemical performance in Li-ion storage when used as the anode materials, which benefited from the combination of the high capacity of magnetite and favorable electrical conductivity of Ti 3 C 2 . The optimized Fe 3 O 4 @Ti 3 C 2 -2.5 (a mass ratio of 1.1) showed a high reversible capacity of 342.9 mAh·g −1 at 1C, which exceeded the theoretical capacity of bare Ti 3 C 2 monolayer (320 mAh·g −1 ), and an impressive rate reversibility. TEM presented that the carbon layers were homogeneously coated on the surface of nanocomposites with a thickness of approximately 1 nm. The electrochemical measurement showed that C-coated Fe 3 O 4 @Ti 3 C 2 -2.5 presented enhanced cycling performance (382.9 mAh·g −1 at 1C and 236.7 mAh·g −1 at 5C) and cycling stability. This work presents a promising route for preparation of transition metal oxides@MXene nanocomposites as well as further surface modification for advanced Li-ion storage.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）