JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Xuhui Wang,Jianying Wang,Zihe Chen,Kai Yang,Zexian Zhang,Zhuoxun Shi,Tao Mei,Jingwen Qian,Jinhua Li,Xianbao Wang
Herein, yolk-double shell Fe 3 O 4 @C@C nanospheres (YDS-FCCNs) were designed and synthesized via solvothermal and following heat management. The as-obtained yolk-shell morphology consisted by two parts: one for the Fe 3 O 4 @C nanosphere (diameter about 100 nm) as core, and the other for nitrogen-doped carbon (thickness about 50 nm) as the shell. The YDS-FCCNs composite exhibited preeminent cycling stability of 780 mAh/g at 0.5 A/g after 500 cycles, even at higher current density of 2 A/g, it still retained a reversible capacity of 559 mAh/g after 500 cycle. The good electrochemical performance could attribute to the following factors: First, the hierarchical double carbon shell could prevent the agglomeration of the Fe 3 O 4 , meanwhile largely enhance the electrical conductivity . Second, the synergistic effects for multilayered structure and atomic doping could improve the comprehensive electrochemical performance.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Yuxue Shan,Yanyan Liu,Li Feng,Shuao Yang,Xiaohong Tan,Zerong Liu
Tetracycline is an organic compound that poses a significant threat to both the ecological environment and human health during its long-term production and use. Advanced oxidation processes based on sulfate radicals (SR-AOP) have been recognized as effective techniques for treating antibiotic contamination. However, The urgent demand for a green, efficient, and recyclable catalyst to effectively facilitate persulfate treatment of tetracycline pollution is evident. Magnetic Fe 3 O 4 -C@MoS 2 composite were synthesized using hydrothermal and pyrolysis methods. Degradation experiments, free radical quenching experiments, EPR analysis were carried out to investigate the degradation performance and mechanisms of Fe 3 O 4 -C@MoS 2 composite. Results showed that the degradation efficiency of 100 mL of 20 mg/L tetracycline solution reached up to 97% within 40 mins with the dosage of 20 mg Fe 3 O 4 -C@MoS 2 and 30.7 mg peroxmonosulfate. Furthermore, this degradation system exhibited excellent efficiency even over a wide pH range of 3–9. The transformation of Mo (IV) and S 2- /S n 2- species valence states facilitated the conversion between Fe(III)/Fe(II). Both free radical ( S O 4 ⋅ − , ⋅ O H and O 2 ⋅ − ) as well as non-free radical species ( O 2 1 ) were found to accelerate the catalytic reaction during the tetracycline degradation. The possible pathways of tetracycline degradation were proposed, and the toxicity of the intermediate products were proved to be lower than that of tetracycline. Finally, magnetic Fe 3 O 4 -C@MoS 2 composites possessed good reusability and stability after 4 cycles of degradation.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Materials Research Express
·
2014
·Vol. 1
·期 4
·045037
·
IF 0
Jianfei Zhang,Aihua Sun,Xuanxuan Qiao,Chengyi Chu,Chongyang Wang,Tao Chen,Jianjun Guo,Gaojie Xu
The photonic properties of Fe3O4@C and Fe3O4 colloidal suspensions in an external electric field have been investigated. Compared to Fe3O4, the Fe3O4@C colloidal suspension has been found to have a wider tunability range of the optical spectrum and a stronger electric response in low electric fields. Based on the dielectric spectroscopy analysis of Fe3O4@C and Fe3O4 colloidal suspensions, a dielectric loss model has been proposed to explain the significant effect of the carbon shell on the electrically modulated photonic property of the Fe3O4@C suspension.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
FUEL
·
2015
·
IF 3.52
Fan Zhang,Zhen Fang,Yi-Tong Wang
Magnetic heterogeneous catalyst (Na 2 SiO 3 @Fe 3 O 4 /C) was prepared for the production of biodiesel from oils with high acid value (AV) under ultrasonic (US) irradiation and magnetic stirring (MS). With the catalyst and assisted by US, soybean biodiesel yield reached >90% in only 20 min (or at 318 K) and 97.9% under the optimal conditions. It was easily magnetically separated for 5 cycles with 94.9% recovery rate and biodiesel yield >80% with both US and MS. The catalyst transesterified Jatropha oil with biodiesel yields of 94.7%, 93.2% and 83.5% at AV of 1.3, 4.8 and 7.3 (mg KOH/g) with US, and was cycled 5 times with yield >70% at AV of 4.8 assisted by US and MS. High biodiesel yield (90.7%) was still achieved from high AV oil (4.8) at low US energy density (0.1 W/mL) and MS. The catalyst combined with US and MS can find practical application for direct production of biodiesel from oils with high AV.
研究领域:
化学工程
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2019
·
IF 2.584
Chunxia Wang,Huangliang Zhong,Wenjie Wu,Caiwen Pan,Xiaoran Wei,Guanglin Zhou,Fan Yang
Herein, we demonstrate a new class of core–shell magnetic carbon hybrid materials (Fe3O4@C) for remarkable adsorptive desulfurization of dibenzothiophene (DBT), which have been successfully prepared through hydrocarbonization of glucose on the surface of Fe3O4 and the subsequent pyrolyzation process. The as-obtained Fe3O4@C retains amorphous nature of carbon shells with a large surface area and displays an increase of iron atoms as active sites under elevated pyrolyzation temperature which is favorable in the adsorption of sulfur-containing species through physical and chemical adsorption, respectively. We investigate the adsorption capacity and efficiency of Fe3O4@C as a magnetically adsorbent for the removal of DBT in model oils under various experimental conditions including the adsorbent obtained at different temperatures, the amount of adsorbents, the DBT initial concentration, the regeneration approach, as well as the interference species. Our results demonstrated that the as-obtained Fe3O4@C at 650 °C (Fe3O4@C-650) displays a remarkable estimated adsorption performance (57.5 mg DBT/g for 200 ppmw), extraordinary high desulfurization efficiency (99% for 200 ppmw), and a high selectivity for DBT compared with its derivatives. Moreover, Fe3O4@C can be recovered in a quite easy, economical, and eco-friendly manner by an external magnet after five cycles without significant weight loss, which significantly simplifies the operation procedure and favors the recycle of Fe3O4@C. Combined with the economic and eco-friendly merits, Fe3O4@C offers a new avenue to employ the magnetic carbon materials for industrial applications and provides a promising substitute for adsorptive desulfurization in view of academic, industrial, and environmental aspects.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Ling Zhang,Xijian Liu,Min Zhang,Haikuan Yuan,Lijuan Zhang,Jie Lu
We present here a novel, simple, low cost and green synthetic strategy for unique core-shell structured Fe 3 O 4 @C-MoO 2 -Ni composites without using extra reducing agent. The Fe 3 O 4 @C-MoO 2 -Ni composites exhibited better catalytic performance (reduction of 4-nitrophenol to 4-aminophenol) than previous common catalysts because highly dense satellite Ni nanoparticles firmly distributed on the porous carbon spheres. In addition, the Fe 3 O 4 @C-MoO 2 -Ni composites can be used as a pollutant remover due to fast adsorption rate and high adsorption capacity for dye in water. More importantly, owing to high magnetic susceptibility , the Fe 3 O 4 @C-MoO 2 -Ni composites show excellent performance for recyclable use by magnetic separation. Thus, the Fe 3 O 4 @C-MoO 2 -Ni composites have great potential as an ideal catalyst and adsorbent due to facile and green synthesis method, good stability, excellent recyclability, nontoxic and low cost properties.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2025
·Vol. 18
·期 1
·151
·
IF 3.2
Jiaxing Cai,Yunye Cao,Bingfei Yang,Jiajie Li,Michael Hitch
This study presents a novel Fe3O4/C composite material synthesized from red mud through a process of magnetic roasting and separation. The research explores the impact of Fe3O4/C dosages, sodium persulfate (PS) concentrations, and initial solution pH on the chemical oxygen demand (COD) removal efficiency using Acid Orange 7 as a model pollutant. Optimal conditions were identified as 3 g/L Fe3O4/C, 20 mM PS, and an initial pH of 2, achieving a 94.11% COD removal efficiency within 30 min. X-ray diffraction and photoelectron spectroscopy analyses confirmed that the magnetization roasting process effectively transformed red mud’s ferric oxide (Fe2O3) into magnetite (Fe3O4). Concurrently, Fe3O4interacted with residual carbon to form the Fe3O4/C composite. This composite demonstrated superior catalytic performance, along with excellent recyclability and reusability.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2023
·
IF 3.8
Zichang Shi,Shan Qing,Zhumei Luo,Yiqin Liu,Jiachen Li
Fe 3 O 4 @C yolk-shell nanoparticles were synthesized by a one-pot solvothermal method using ferrocene as raw material and dispersed in deionized water to configure four different concentrations of water-based Fe 3 O 4 @C nanofluids. The morphology of Fe 3 O 4 @C nanoparticles was characterized. The results showed that the average particle size of Fe 3 O 4 @C nanoparticles was in the range of 82–84 nm with stable yolk-shell structure and large specific surface area. The stability of Fe 3 O 4 @C nanofluid was investigated. The results showed that Fe 3 O 4 @C nanofluid has good stability with maximum zeta potential values at pH 8–9. The thermal properties of Fe 3 O 4 @C nanofluids were investigated, and for the prepared nanofluids, the thermal conductivity increased with temperature and nanoparticle concentration, possessing excellent thermal stability. The magnetic responsiveness of Fe 3 O 4 @C nanofluid was characterized, and the results showed that the magnetic properties of Fe 3 O 4 @C nanofluid increased with increasing concentration.
研究领域:
材料科学
·
纳米技术
·
化学工程
·
热力学
·
磁学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2022
·Vol. 169
·期 9
·097501
·
IF 4.386
Dongmei Ren,Xingwen Wang,Chunpeng Leng,Wei Meng,Jingrui Zhang,Chao Han
4-Nitrophenol (4-NP) is a typical organic pollutant, thus it is urgent to detect it in environmental samples. This study rationally designed a novel electrode material of P-doping Fe/Fe3O4@C (P-Fe/Fe3O4@C) prepared with MIL-88 as precursor. P2h-Fe/Fe3O4@C-700 was synthesized by calcining MIL-88 at 700 °C, followed by annealing process with NaH2PO2 for 2 h. The P2h-Fe/Fe3O4@C-700 modified glassy carbon electrode (P2h-Fe/Fe3O4@C-700/GCE) showed a high electrocatalytic activity toward 4-NP reduction due to its active metal center, fine-tuned electronic structure by P-doping, as well as good electrical conductivity. It exhibited excellent sensing behaviors in 4-NP detection with rather high sensitivities of 1415.43 μA·mM−1·cm−2 and 424.63 μA·mM−1·cm−2 in the 4-NP concentration of 5 to 100 μM and 100 to 1200 μM, respectively, with a low detection limit of 0.462 μM. The P2h-Fe/Fe3O4@C-700/GCE still had good selectivity for 4-NP detection in the presence of common interferences. In addition, it was found that the current response towards 4-NP at P2h-Fe/Fe3O4@C-700/GCE retained more than 97% of its initial value after one week, indicating a good long-term stability. Furthermore, the P2h-Fe/Fe3O4@C-700/GCE exhibited a good reproducibility. The constructed P2h-Fe/Fe3O4@C-700/GCE achieved practical uses for the sensing of 4-NP in tap water with satisfactory recoveries.
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 NANOPARTICLE RESEARCH
·
2016
·Vol. 18
·期 11
·1-13
·
IF 2.101
Hou Yanhui,Wang Yechen,Yuan Huili,Chen Hang,Chen Guowei,Shen Junhai,Li Liangchao
Heterogeneous photo-Fenton SiO 2 /Fe 3 O 4 /C@TiO 2 (SFCT) catalyst with a core-multishell structure and a diameter of about 550 nm was successfully prepared and was characterized by scanning electron microscopy (SEM), TEM, XRD, Raman, and Fourier transform infrared (FT-IR). The results illustrated that anatase TiO 2 coexisted with rutile TiO 2 , in which the anatase phase was the main crystal phase. In addition, the catalytic activity of SFCT catalyst had been evaluated in the catalytic degradation on p-nitrophenol (PNP). The influence factors on the PNP degradation, including SFCT component ratio ( m
SFC / m
TiO2 ), H 2 O 2 dosage, solution pH, and PNP concentration, had been investigated. And the contrast experiments about the photo-Fenton catalytic mechanism revealed that the SFCT-2 catalyst possessed a superior activity in the neutral environment due to the optimal activity matching between Fe 3 O 4 and TiO 2 , and it exhibited the stable catalytic performance after five successive recycles. Therefore, the SFCT-2 catalyst had a promising application for the photo-Fenton degradation of organic contaminant.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2013
·
IF 3.328
Wei Yao,Chen Shen,Yun Lu
Uniform core–shell Fe 3 O 4 @C@polyaniline (PANi) composite microspheres have been prepared via simple in situ polymerization in the absence of surfactants . In this case, the carbon intermediate layer plays an important role in the formation of trilaminar core–shell structure. By simply adjusting the molar ratio of aniline to Fe 3 O 4 , the thickness of the polymer shell can be tuned from about 27 to 62 nm. The obtained Fe 3 O 4 @C@PANi trilaminar core–shell composite microspheres are used as magnetic adsorbent for the removal of methyl orange (MO) dye from aqueous solution, exhibiting an excellent adsorption capability of 120.2 mg g −1 for MO and retaining about 81% of the removal efficiency after five adsorption–desorption cycles. The adsorption isotherms and kinetics are well described by the Langmuir and pseudo-second-order models respectively. The Fe 3 O 4 @C@PANi composite microspheres could be a good candidate in the waste water treatment for the removal of organic dyes.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Chemistry Frontiers
·
2022
·Vol. 6
·期 17
·2524-2534
·
IF 8.683
Xinyan Lv,Zhonglin Wei,Canyu Cui,Wenwen Wang,Yumei Tan,Shihui Jiao,Guangsheng Pang
Developing superhydrophobic material with good chemical stability, non-toxic and low-cost for effectively handling oil spill incidents, chemical leakages and industrial oily wastewater has become an urgent need. In this work, superhydrophobic Fe3O4@C microspheres have been successfully anchored on polyurethane (PU) sponge skeleton surface with polyvinylidene fluoride (PVDF) as intermediate layer. The superhydrophobic Fe3O4@C/PVDF/PU sponge possesses outstanding superhydrophobic performance with water contact angle (WCA) of 156.5° and sliding angle (SA) of 6°. Meanwhile, the Fe3O4@C/PVDF/PU sponge shows excellent chemical, thermal and mechanical stabilities under harsh conditions, high separation efficiencies for surfactant-stabilized organic solvent/water emulsions (more than 99.6% for both O/W and W/O emulsions) and preferable recyclability (more than 15 cycles). The comprehensive performances of the Fe3O4@C/PVDF/PU sponge make it a promising candidate for the treatment of industrial oily wastewater.
研究领域:
材料科学
·
环境工程
✓ 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）