JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Shenghui Xie,Jiaxin Su,Jianxin Zhao,Haipeng Yang,Haixia Qian
Glassy zero-valent iron (GZVI) is one of the potential Fenton-like catalysts due to its amorphous nature and high energy state, but the catalytic activity still needs to be further enhanced, especially using low-cost technology suitable for industrialization. In this paper, Fe 3 O 4 particles were embedded into the surface of Fe 91.9 Si 5.3 B 2.8 amorphous powder through a conventional low-cost ball milling technique, which endowed Fe 3 O 4 /GZVI with improved catalytic activity. GZVI attained the best surface morphology and the highest catalytic efficiency (3 times as high as pure GZVI) at a 10 % Fe 3 O 4 addition. The Fe 3 O 4 -decorated catalysts could decompose p-nitrophenol by 97.37 % within 15 min and exhibited good stability and reusability within seven cycles. The galvanic cell formed between Fe 3 O 4 and GZVI because their large OCP gap was responsible for the improved catalytic activity, which promoted electron transfer and •OH generation. The faster electron mobility accelerated the oxidation of Fe 2+ and Fe 0 and the reduction of Fe 3+ on the catalyst surface with the aid of H 2 O 2 , thus promoting the pollutant degradation process. The amount and distribution of Fe 3 O 4 particles and the bonding state between Fe 3 O 4 and GZVI markedly influence the degradation reaction and reusability. Fe 3 O 4 /GZVI is a promising heterogeneous Fenton-like catalyst with low-cost and large-scale engineering application prospects.
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 NANOSCIENCE AND NANOTECHNOLOGY
·
2013
·Vol. 13
·期 10
·6953-6960
·
IF 1.149
Shi Haowei,Huang Yan,Cheng Chao,Ji Guoyuan,Yang Yuxiang,Yuan Hongming
The size- and shape-controlled Fe3O4@SiO2 nanocomposites were successfully synthesized via the sol–gel method. The results showed that the size, shape, and property of the products were directly influenced by the amount of TEOS, and the concentration
of water-based magnetic fluid in the coating process. The morphology and properties of the products were characterized by TEM, SEM, X-ray powder diffraction, IR and EDS. The Fe3O4@SiO2 composites with easily-controlled size arranged from 58 to 835 nm could
be synthesized by adjusting the experimental parameters. When TEOS amount is 1 mL and the concentration of magnetic fluid were 30.0 and 10.0 mg/mL respectively, chain-like and peanuts-like well-dispersed Fe3O4@SiO2 particles with clear core–shell structure
were obtained. These size- and shape-controlled Fe3O4@SiO2 composites may have potential application in the field of targeted drug delivery and MRI contrast agent.
研究领域:
材料科学
·
纳米医学
✓ 已验证
DOI
PubMed
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2023
·
IF 6.9
Jie Yu,Yuwei Wang,Cong Qi,Wenjie Zhang
To improve the utilization efficiency of solar energy, Ag@Fe 3 O 4 core-shell nanoparticles with strong light absorption capacity were prepared, and showed good photothermal and photoelectric properties . Synergistic effects of nanoparticle concentration, light intensity and metal foam on photothermal and photoelectric properties were studied. The results showed that the SPR effect of nanoparticles improves the light absorption ability. Compared with deionized water , the addition of nanoparticles can increase the temperature by 6.10% and the power generation efficiency by 18.75%. When the concentration exceeds a certain range, the increase in concentration no longer plays a positive role. The increase of light intensity can increase the voltage and output power by up to 45.28% and 44.78%. However, it will increase the temperature gradient between the surface and the bottom of the nanofluids , increase the heat loss, and lead to a decrease in power generation efficiency . The synergistic effect of nanoparticles and metal foam can better improve the photothermal performance. The addition of metal foam can increase the power generation efficiency by 5.65%.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 15
·2587
·
IF 5.719
Gaihuan Ren,Zhanzhao Li,Dongxu Lu,Bo Li,Lulu Ren,Wenwen Di,Hongqin Yu,Jianxin He,Dejun Sun
Herein, we describe pH and magnetism dual-responsive liquid paraffin-in-water Pickering emulsion stabilized by dynamic covalent Fe3O4(DC-Fe3O4) nanoparticles. On one hand, the Pickerinfigureg emulsions are sensitive to pH variations, and efficient demulsification can be achieved by regulating the pH between 10 and 2 within 30 min. The dynamic imine bond in DC-Fe3O4can be reversibly formed and decomposed, resulting in a pH-controlled amphiphilicity. The Pickering emulsion can be reversibly switched between stable and unstable states by pH at least three times. On the other hand, the magnetic Fe3O4core of DC-Fe3O4allowed rapid separation of the oil droplets from Pickering emulsions under an external magnetic field within 40 s, which was a good extraction system for purifying the aqueous solution contaminated by rhodamine B. The dual responsiveness enables Pickering emulsions to have better control of their stability and to be applied more broadly.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
POLYMER COMPOSITES
·
2024
·
IF 4.8
Zhiqiang Xia,Ruxi Dai,Rui Wang,Jianhong Gao,Bo Qu,Shaoyun Chen,Cuifang Cai,Dongxian Zhuo
There are increasing need for the development of electromagnetic wave-absorbing materials since the growing concern about electromagnetic interference. However, materials with integrated structure and function are difficult to attain due to the high content of functional fillers. In this paper, carbon nanotubes (CNTs) were formed into a three-dimensional porous framework, known as Buckypaper (BP), which was subsequently in situ deposited with iron tetraoxide (Fe 3 O 4 ) through the sol–gel method and incorporated into epoxy resin to create Fe 3 O 4 /BP/EP composites by hot pressing. The three-dimensional porous structure of Fe 3 O 4 /BP facilitates the high-content incorporation and uniform dispersion of CNTs and Fe 3 O 4 nanoparticles. The results indicate that the 33%Fe 3 O 4 /BP/EP composite achieved an optimal reflection loss of −38.41 dB and an absorption bandwidth of 3.28 GHz at the optimal matching thickness of 1.5 mm. This performance primarily stems from Fe 3 O 4 adjusting the impedance matching of BP and enhancing the magnetic loss capability of CNTs. Furthermore, the deposition of Fe 3 O 4 on BP improves the mechanical strength of BP/EP, The 17% Fe 3 O 4 /BP/EP composite achieves a tensile strength of 35.09 MPa, which is 46.27% higher than that of BP/EP and 92.38% higher than pure EP. Highlights Fe 3 O 4 /BP was prepared by deposition of Fe 3 O 4 onto surfaces of the CNTs framework. Fe 3 O 4 /BP/EP composites with different Fe 3 O 4 /BP were fabricated. Fe 3 O 4 adjusts impedance matching of BP, and forms heterogeneous interfaces. Fe 3 O 4 /BP/EP composites exhibit excellent wave absorption performance. Fe 3 O 4 /BP/EP composites possess improved mechanical properties.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
RUSSIAN JOURNAL OF APPLIED CHEMISTRY
·
2021
·Vol. 94
·期 8
·1066-1071
·
IF 0.85
Vorobyova E. V.
Abstract The effect of fillers, metal oxide nanoparticles (Fe 3 O 4 , ZnO), on the thermal oxidation resistance of polyethylene inhibited by the phenolic antioxidant Irganox 1010 was studied. The distribution of nanoparticles in the polymer matrix was carried out by ultrasound, and the samples were formed by thermal pressing. Thermal oxidation resistance was determined by the duration of the induction oxidation period of film samples. It is shown that the pressure of the press during the formation of the material has a significant effect on the thermal oxidation resistance of the inhibited composite, both filled with nanoparticles of Fe 3 O 4 , ZnO, and unfilled. The nature of the effect of the concentration of the nanofiller on the thermal oxidation resistance of the samples depends on the metal oxide used. An increase in the concentration of the filler Fe 3 O 4 leads to a decrease in the thermal oxidation resistance of the polymer; when using ZnO, this dependence is inverse. The oxidation of the prepared nanocomposite film samples formed under high pressure conditions revealed synergistic effects of nanofillers and antioxidants.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
Materials Research Express
·
2018
·Vol. 5
·期 5
·056305
·
IF 1.151
Xiaogang Su,Jun Wang,Bin Zhang,Wei Chen,Qilei Wu,Wei Dai,Yi Zou
Recently, owing to the radiation and interference from electromagnetic wave (EMW), the requirements of EMW absorbing materials have been increasing. Herein, a novel absorber composed of graphite nanosheets@Fe3O4 composites decorated comb-like MnO2 (GNFM) has been successfully synthesized via a facile two steps, characterized using x-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), x-ray photoelectron spectroscopy (XPS), Raman spectroscopy, vibrating sample magnetometry (VSM) and vector network analyzer (VNA). The ternary composites with enhanced microwave absorption performance are due to the complementary effects of electroconductive material (graphite nanosheets), dielectric materials (MnO2) and magnetic material (Fe3O4 nanospheres). Hence, the maximum reflection loss of GNFM/epoxy composites is up to −31.7 dB at 5.85 GHz with absorbing thickness of 4.5 mm, and the efficient frequency bandwidth below −10 dB can reach up to 4.47 GHz (11.87–16.34 GHz) at matching thickness of 2 mm. The results demonstrate that GNFM could be regarded as a novel type of microwave absorbing material.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2021
·
IF 5.097
Bin Zuo,Qinyue Deng,Han Shao,Bingbing Cao,Yunhui Fan,Wanfang Li,Mingxian Huang
In this work, we designed the Fe3O4@mesoporous-SiO2@chitosan@polyaniline core–shell nanoparticles (Fe3O4@mSiO2@CS@PANI, hence abbr. FSCP), which can be used to capture Cr(VI) in wastewater. Rapid adsorption behavior and high removal capability (249.6 mg Cr(VI) per gram of FSCP) were exhibited by this material. X-ray photoelectron spectroscopy (XPS) analysis demonstrates that Cr(VI) was adsorbed and in situ reduced on FSCP at pH 2. Adsorption was facilitated by the electrostatic attraction of HCrO4– and −N+═C–/–N+H–, while the active −NH–/–N+H– sparked the reduction of Cr(VI) to Cr(III). Moreover, the coordination of the resulting Cr(III) with the amino group promoted adsorption, thus achieving detoxification of Cr(VI) in wastewater. After eight recycling experiments, the Cr(VI) removal efficiency of this material is still more than 90%, indicating that this material has excellent stability and good application potential. Therefore, this magnetic adsorbent offers a potential solution for the successful handling of chromium-containing wastewater.
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
RSC Advances
·
2015
·Vol. 5
·期 70
·56478-56485
·
IF 3.84
Guozhi Fan,Shanshan Luo,Qiang Wu,Tao Fang,Jianfen Li,Guangsen Song
A magnetic Fe3O4@SiO2–ZnBr2 catalyst was prepared by supporting ZnBr2 on silica-coated magnetic nanoparticles of Fe3O4 and used as a recoverable catalyst for the direct synthesis of diphenyl carbonate (DPC) from CO2 and phenol in the presence of carbon tetrachloride. The as-prepared catalyst was characterized by infrared spectroscopy (IR), powder X-ray diffraction (XRD), a X-ray photoelectron spectrometer (XPS) and BET. Zn loading in the supported catalyst and leaching during the reaction process were determined by atomic absorption spectroscopy (AAS). It was found that Fe3O4@SiO2–ZnBr2 showed higher catalytic activity than homogenous ZnCl2 and ZnI2 as well as homogenous ZnBr2. With this new catalyst under optimized conditions, a yield of DPC at 28.1% was obtained. The heterogeneous catalyst Fe3O4@SiO2–ZnBr2 can also be recovered by a permanent magnet after the reaction and reused up to 4 times without noticeable deactivation.
研究领域:
化学工程
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2019
·
IF 4.916
Yarong Huang,Yongzhao Zhang,Dandan Liu,Menggang Li,Yongsheng Yu,Weiwei Yang,Haibo Li
Dopamine (DA) detection is significant for the prevention of unfavorable neuronal illness. However, the detection of DA with low concentration still face tremendous challenges. In this study, highly ordered mesoporous Fe 3 O 4 materials were synthesized as a biosensor by using mesoporous silica KIT-6 with different aging temperature as hard template. The ordered mesoporous Fe 3 O 4 with high surface area modified glassy carbon electrode shows the high sensitivity for detecting DA. Fe 3 O 4 -40 mesoporous material modified electrode has the highest catalytic activity to DA with a sensitivity of 0.053 nA nM −1 and a detection limit of 0.8 nM (S/N = 3). The results indicating that the mesoporous Fe 3 O 4 material modified electrode exhibits high sensitivity to determine DA at low levels, which can be used for DA real-time monitoring in neutral biological media.
研究领域:
生物传感
·
材料科学
·
神经生物学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2013
·
IF 5.008
Bin Shen,Wentao Zhai,Mimi Tao,Jianqiang Ling,Wenge Zheng
Novel high-performance polyetherimide (PEI)/graphene@Fe3O4 (G@Fe3O4) composite foams with flexible character and low density of about 0.28–0.4 g/cm3 have been developed by using a phase separation method. The obtained PEI/G@Fe3O4 foam with G@Fe3O4 loading of 10 wt % exhibited excellent specific EMI shielding effectiveness (EMI SE) of ∼41.5 dB/(g/cm3) at 8–12 GHz. Moreover, most the applied microwave was verified to be absorbed rather than being reflected back, resulting from the improved impedance matching, electromagnetic wave attenuation, as well as multiple reflections. Meanwhile, the resulting foams also possessed a superparamagnetic behavior and low thermal conductiviy of 0.042–0.071 W/(m K). This technique is fast, highly reproducible, and scalable, which may facilitate the commercialization of such composite foams and generalize the use of them as EMI shielding materials in the fields of spacecraft and aircraft.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Xiaoyu Wang,Yan Zhao,Huanchen Liu,Bo Dai,Xiaobo Wang,Wenjing Lou,Jun Yang
Solvent-free nanofluids were synthesized by grafting an organic oligomer shell onto the nanomaterial core, demonstrating significant liquid flow behavior at room temperature without any solvents. The synergistic effect within the solid–liquid combination found in solvent-free nanofluids positions them as potential lubricant candidates. In this study, solvent-free MXene@Fe3O4 nanofluids (MXene@Fe3O4 NFs) were successfully synthesized by loading Fe3O4 nanoparticles in situ onto MXene nanosheets, followed by covalent grafting with a silane coupling agent and a flexible long-chain polyetheramine. Its magnetic response properties were then assessed, highlighting its potential for recyclability. The tribological performance of MXene@Fe3O4 NFs as lubricants was examined under varying operating conditions with a focus on the morphology and chemical composition of the worn surface to elucidate the lubrication mechanism. The results reveal that MXene@Fe3O4 NFs, compared to MXene NFs and Fe3O4 NFs, exhibit optimal tribological performance. Additionally, even under severe loads, temperatures, or frequencies, MXene@Fe3O4 NFs show superior friction-reduction and wear-resistant properties. This phenomenon can be attributed to the fluidity endowed by the organic shell layer coupled with the synergistic tribological effects between MXene nanosheets and Fe3O4 nanoparticles. As solid–liquid lubricants with magnetic responsivity, MXene@Fe3O4 NFs present an effective strategy for high-performance lubricants synthesis.
研究领域:
材料科学
·
纳米技术
·
摩擦学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）