International Journal of Environmental Science and Technology
·
2024
·
IF 3
Cheng T.,Chen C.,Wen M.,Pan F.,Zhang X.,Ma H.,Hou B.,Xin X.
Developing highly efficient and low-cost composite electrode is a crucial step to achieve hydrogen and oxygen evolution reaction from overall water splitting. Herein, a ternary composite electrode derived from coating fly ash magnetic spheres and Graphite nanosheet on the carbon cloth surface, could greatly boost hydrogen and oxygen evolution reaction. Meanwhile, the efficiencies of overall water splitting were highly enhanced. The microstructure characterizations of composite material revealed that abundant magnetite crystals were existed on the fly ash magnetic spheres surface, and the main exposed crystal plane was active Fe 3 O 4 (111). Moreover, the composite electrode exhibited remarkable catalytic activities for hydrogen and oxygen evolution reaction, with lower overpotential of 175.6 mV and 328 mV at 10 mA·cm −2 , small Tafel slope of 45.5 mV·dec −1 and 77.9 mV·dec −1 , respectively, accompanied by prominent cycle stability. The overpotentials of hydrogen and oxygen evolution reaction were increased merely after 3000 CV cycles. Moreover, the electrocatalysis reaction mechanisms conducted by Density Functional Theory calculation illustrated that the combination of both advantages of Graphite nanosheet displaying superior electron transmission capacity, and the crystal plane of Fe 3 O 4 (111) gaining excellent electrocatalytic activity, gave ternary composite noticeably improved performances toward hydrogen and oxygen evolution reactions. Specifically, it required merely 1.73 V of potential difference to onset the overall water splitting reaction. This work opens a strategy to develop low-cost, efficient and earth-abundant catalysts for water splitting, and broaden the comprehensive utilization way of coal fired fly ash.
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高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
X. Sun,M. Wang,Y.Q. Ma
For the first time, magnetic nano-structures (MNS) of 2D ε-Fe 3 N nano-sheets and 1D Fe 3 O 4 /Fe 3 N heterogeneous nano-chains were synthesized through electrochemical anodization without the assistance of any templates or surfactants. 2D BiOCl nano-sheets were intimately grown on surfaces of these MNS via the vapor-thermal method and isopropanol and ethylene glycol acting as solvents. As a result, 2D-2D and 1D-2D magnetic photocatalysts were achieved. MNS function as directing agents of BiOCl growth and control the oriented growth of BiOCl; furthermore, they compress the BiOCl crystal lattice due to the strain at the interface between MNS and BiOCl. BiOCl grown on 2D nano-sheets exhibits a flower-like morphology that consists of square nanosheets, while exhibiting the morphology of epispastic sponge for BiOCl grown on 1D heterogeneous nano-chains. To the best of our knowledge, this has not been reported before. The synergistic effects of MNS and BiOCl enhance the absorbance in the visible-light spectrum. All magnetic photocatalysts exhibited excellent adsorption and degradation abilities to target pollutants such as rhodamine B, methylene blue, and phenol. Here, using MNS as directing agents opens up a new route to realize the oriented assembly and growth of BiOCl nanosheets; this strategy can be adjusted for the synthesis of other catalysts.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2018
·
IF 6.735
Chunfeng Wang,Yufan Wu,Tongxu Qu,Shasha Liu,Yunqing Pi,Jinyou Shen
The application of zero-valent iron (ZVI) for Cr(VI) removal often presents limitations due to its easy passivation. In this study, a column packed with hydroxyl-functionalized ball-milled ZVI/Fe 3 O 4 (HFB-ZVI/Fe 3 O 4 ) composite, assisted with Na 2 EDTA complexation, was developed to achieve sustainable treatment of Cr(VI)-containing wastewater. The results showed that at influent Cr(VI) concentration of as high as 50 mg/L, effluent Cr(VI) concentration below 0.5 mg/L was sustained for bed volume of as high as 1271 BV along with 2 g/L Na 2 EDTA concentration. Through the hydroxyl-functionalized treatment, FeOOH coating containing surface-adhering Fe(II) on the composite surface can be formed. Hydrolysis and auto-reduction of Fe(II)/Fe(III) species caused proton accumulation, resulting in remarkable attraction of anionic Cr(VI) via electrostatic interaction and exchange. Therefore, the reduction of Cr(VI) to Cr(III) was considerably enhanced. On the other hand, Na 2 EDTA complexation suppressed the growth of passivation layer and generated fresh corrosion products, thereby providing additional reactive sites for Cr(VI) removal. Additionally, Na 2 EDTA recovery and spent column regeneration were successfully proven. The remarkable effectiveness of Cr(VI) removal from actual electroplating wastewater confirmed the potential of the HFB-ZVI/Fe 3 O 4 composite-packed column and Na 2 EDTA assistance-coordinated system in full-scale application.
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高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2017
·
IF 4.164
Chili Zhao,Xun Liu,Xia Zhang,Hong Yan,Zhilei Qian,Xinghui Li,Zhenye Ma,Qiaorong Han,Chonghua Pei
In this paper, Fe 3 O 4 /chitosan/isoniazid magnetic nanoparticles (Fe 3 O 4 /CS/INH-MNPs) were prepared as an environmental stimuli-responsive drug-delivery system by automated in situ click technology, in which Fe 3 O 4 magnetic nanoparticles, chitosan and isoniazid were simultaneously in situ crystallized by one-step method. The Fe 3 O 4 magnetic nanoparticles and tripolyphosphate act as stable crosslinkers to produce numerous intermolecular crosslinkages for the mobility of the chitosan chains. Characterization results indicated that the multifunctional drug delivery system with optimized size, excellent loading capacity, well magnetic properties, nontoxicity and pH triggered drug release property is expected to be applied in tuberculosis treatment with excellent magnetic sensitivity and sustained release.
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高影响因子
Royal Society Open Science
·
2022
·Vol. 9
·期 9
·
IF 3.653
Ye He,Panlin Wang,Xiaojing Chen,Yahuang Li,Jiajun Wei,Guoxi Cai,Kiyoshi Aoyagi,Wenxiang Wang
A simple strategy to rapidly detect glucose was developed by utilizing core (Fe3O4)–shell (Pt) magnetic nanoparticles (Fe3O4@Pt NPs) as a nanoenzyme and a paper-based colorimetric sensor. In the presence of H2O2, Fe3O4@Pt NPs catalyze the redox reaction of 3,3′,5,5′-tetramethylbenzidine (TMB) and generate a colour change from colourless to blue. On this basis, a colorimetric glucose sensing method assisted by glucose oxidase (GOx) was developed. Under the optimal conditions, the detection limits of the proposed assay for H2O2 and glucose were 0.36 µM and 1.27 µM, respectively. Furthermore, the fabricated colorimetric method was successfully applied to analyze glucose concentrations by using a paper device as a measuring platform without a spectrometer. In addition, this method exhibited satisfactory recovery for glucose detection in human serum samples and urine samples, which satisfied the requirements for normal detection of real samples. This study provides a good candidate for health monitoring of glucose and also expands the applications of nanoenzymes and paper-based colorimetric assays in point-of-care testing.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2019
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IF 8.355
Li Guo,Kai Lai Zhang,Huidong Shen,Chan Wang,Qiang Zhao,Danjun Wang,Feng Fu,Yucang Liang
Exploiting highly efficient and stable photocatalysts for treating Cr(VI)-containing wastewater is of great importance. Herein, a robust core-shell structurally magnetic Fe 3 O 4 @SiO 2 /Bi 2 WO 6−x F 2x photocatalyst was successfully fabricated and used to photocatalytic Cr(VI) reduction, in which an inert protective layer (SiO 2 )-coated micro/nanostructured Fe 3 O 4 particles can not only improve the chemical stability but also retain magnetic advantage of catalyst. The optimized 55% Fe 3 O 4 @SiO 2 /Bi 2 WO 6− x F 2 x exhibited the highest catalytic activity in a reaction system of pH = 3, the apparent rate constant (k app /min −1 ) of 55% Fe 3 O 4 @SiO 2 /Bi 2 WO 6−x F 2x for photocatalytic reduction of Cr(VI), as high as 0.027 min −1 , is approximately 5.4 and 2.6 times higher than that of Bi 2 WO 6 and Fe 3 O 4 @SiO 2 /Bi 2 WO 6 , respectively. After being illuminated for 90 min, nearly 100% percentage of Cr(VI) has been reduced to Cr(III) by using 55% Fe 3 O 4 @SiO 2 /Bi 2 WO 6−x F 2x as photocatalyst, which can be attributed to the synergistic effect of magnetic Fe 3 O 4 @SiO 2 support – “core”, Bi 2 WO 6 – “shell” and the successful introduction of F − ions. A readily magnetic separation of Fe 3 O 4 @SiO 2 /Bi 2 WO 6−x F 2x catalyst enabled it to reuse conveniently for practical industry application. Finally, the enhanced photocatalytic mechanism of catalyst was proposed for Cr(VI) reduction. The present study not only provides a new mean to solve the recovery of the Bi 2 WO 6 -based photocatalyst, but also presents a promising candidate for Cr(VI) reduction in the field of the industrial wastewater treatment.
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2020
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IF 3.807
Haifeng Xu,Guang Zhu,Zhong Jin
Reasonably designing of counter electrode (CE) and iodine ion electrolyte is crucial for enhancing the power conversion efficiency (PCE) of dye-sensitized solar cells (DSSCs). Fe 3 O 4 possesses high conductivity and catalytic activity to facilitate the electrolyte reduction reaction at the surface of CE. However, the morphology control and active site modulation of Fe 3 O 4 based CE are still to be explored. Herein, we propose a facile bottom-top strategy to prepare hierarchical Fe 3 O 4 nanostructures with different tunable morphologies, including Fe 3 O 4 nanorings (NR), nanosheets (NS) and nanoflowers (NF). Electrochemical impedance spectroscopy , Tafel polarization, cyclic voltammetry and photocurrent density-voltage measurements of these samples were carried out, revealing their high performances as CE in DSSCs. Among them, the Fe 3 O 4 NF with mesoporous nanosphere flower structure and high specific surface area is synthesized, which realized the highest PCE (8.56%), which is also higher than the value of Pt based CE (7.57%). Compared to other competing materials, Fe 3 O 4 nanostructure based CE shows the outstanding merits of high photovoltaic performance , easy preparation, low cost and eco-friendliness, offering the possibility to replace conventional Pt based CE in DSSCs.
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高影响因子
POLYMER COMPOSITES
·
2021
·Vol. 42
·期 12
·6816-6826
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IF 3.171
Changhong Lin,Puyou Ying,Min Huang,Ping Zhang,Tao Yang,Gang Liu,Jianbo Wu,Vladimir Levchenko
The permanently chemically cross-linking solid–solid phase change materials (SSPCMs) were designed to solve the problem of leakage and poor shape stability during the whole process of phase transformation. However, these materials lead to environment pollution and resources waste because of the non-recyclability. Therefore, a SSPCMs was fabricated using dynamic thermal reversible Diels–Alder bonds. The prepared SSPCMs exhibited excellent shape, heat storage stability, and reliability and reprocessed ability, resulting from dynamic Diels–Alder bonds. Moreover, the Halloysite nanotubes decorated with Fe 3 O 4 nanoparticles (HNTs@Fe 3 O 4 ) were used to enhance the thermal conductivity of SSPCMs. When the filler content was 0.5 wt%, the best integrated properties (phase change properties and thermal conductivity) of the SSPCMs were obtained, it had the highest melting and freezing phase change enthalpies about 116.8 and 127.2 J/g, and thermal conductivity value, 0.223 W/m K, which was 101% higher than pure SSPCMs. Hence, the prepared SSPCMs can be considered as promising save-energy, friendly-environment thermal management materials.
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高影响因子
TALANTA
·
2023
·
IF 6.1
Shuang Li,Yu Zhang,Mengdi Guo,Zhibin Yi,Mengna Hu,Chunhong Xiong,Ganhui Huang,Jinsheng Zhang
Electrochemical sensors show distinct advantages over other types of sensors in the rapid detection of microorganisms. Here, we attempted to construct a label-free electrochemical immunosensor based on an Fe 3 O 4 –ionic liquid (IL)-modified electrode to rapidly detect Salmonella in milk. The excellent ionic conductivity of the IL facilitated sensor construction, and the large surface area of nano-Fe 3 O 4 provided numerous sites for subsequent experiments. An antibody was fixed on the Fe 3 O 4 –IL complex with polyglutamic acid modification by a simple infusion method. The microstructure of the Fe 3 O 4 –IL composites was investigated by scanning electron microscopy, and the elements and structures of the composites were analyzed by energy dispersive X-ray and Fourier transform infrared spectroscopy. Under optimized experimental conditions, the detection range of the constructed sensor was 3.65 × 10 2 –3.65 × 10 8 CFU mL −1 , and the LOD was 1.12 × 10 2 CFU mL −1 (S/N = 3). In addition, the prepared electrochemical immunosensor is convenient for detecting foodborne pathogens because of its outstanding stability, good selectivity, and repeatability.
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高影响因子
Materials Science & Engineering C-Materials for Biological Applications
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2018
·
IF 5.08
Tingting Lu,Yan Wu,Chili Zhao,Fu Su,Jine Liu,Zhenye Ma,Qiaorong Han
In this study, Fe 3 O 4 /hyperbranched polyester-(2-dodecen-1-yl)succinic anhydride2-Dodecen-1-/isoniazid magnetic nanoparticles (Fe 3 O 4 /HBPE-DDSA/INH MNPs) with controlled drug release characteristics were synthesized successfully by a simple one-step method. Orthogonal experiments were performed to optimize the loading capacity and encapsulation efficiency of the MNPs. The structure of the Fe 3 O 4 /HBPE-DDSA/INH MNPs was characterized by 1 H nuclear magnetic resonance spectroscopy, matrix-assisted laser desorption/ionization mass spectrometry, Fourier transform infrared spectroscopy, X-ray diffraction analysis, transmission electron microscopy, and superconducting quantum interference device measurements, while their properties were characterized based on swelling behavior observations, in-vitro release experiments, and cytotoxicity analysis. The results indicated that the fabricated Fe 3 O 4 /HBPE-DDSA/INH MNPs had a high drug-loading capacity and encapsulation efficiency. Further, the drug-release rate of the MNPs was higher in an acidic buffer, indicating that the MNPs were pH-responsive. Swelling studies revealed that the MNPs exhibited diffusion-controlled drug release, while in-vitro release studies revealed that the drug-release properties could be controlled readily, owing to the high encapsulation efficiency of the MNPs and the uniform dispersion of the drug in them. These results collectively suggest that this multifunctional nontoxic drug delivery system, which exhibits good magnetic properties and pH-triggered drug-release characteristics, should be suitable for the treatment of tuberculosis.
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高影响因子
Surfaces and Interfaces
·
2022
·
IF 6.137
Jinhao Gao,Wenqiang Chen,Huaqiang Shi,Zhijian Li,Liming Jing,Chen Hou,Jianzhi Wang,Yang Wang
Co 3 O 4 @Fe 3 O 4 /cellulose membrane was synthesized by coating rod-like MOF-derived Fe 3 O 4 with Co 3 O 4 nanoparticles and blending with cellulose solution, further applied in the visible light-driven photo-Fenton system for perfluorooctanoic acid (PFOA) degradation. In the H 2 O 2 /membrane/visible light system, the Electron paramagnetic resonance (EPR) analysis and scavenger experiment results suggested that PFOA degradation was a co-dependent mechanism via photogenerated electrons, photogenerated holes ( h + ) and various radical species, rather than a single active constituent. Co 3 O 4 @Fe 3 O 4 /cellulose membrane showed outstanding degradation performance, stability and recyclability under optimal conditions. Compared with pure Fe 3 O 4 or Co 3 O 4 nanoparticles , the Co 3 O 4 @Fe 3 O 4 /cellulose membrane can degrade around 94.5% PFOA within 180 min in reaction system, and the leached Fe and Co was only 0.05 and 0.49 ppm, respectively. Moreover, Co 3 O 4 @Fe 3 O 4 /cellulose was reused by rinsing with ultra-pure water and the degradation capacity was still 80.4% after five cycles. The degradation pathway of PFOA also was proposed based on UHPLC-MS analysis.
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高影响因子
KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2018
·Vol. 35
·期 9
·1836-1843
·
IF 2.199
Ren Suyu,Tao Jing,Cui Ying,Gao Jinsuo,Li Xiaona,Tan Feng
Bisphenol A (BPA), a known endocrine disruptor, is of global concern because it poses serious threats to the ecological environment and human health. In this work, hydrophilic polydopamine-coated Fe 3 O 4 /oxide graphene (IPDA@MGO) magnetic imprinted nanocomposites were prepared by the self-polymerization of dopamine on the surface of Fe 3 O 4 /GO in Tris-HCl buffer using BPA as a template for selective adsorption of BPA in water. IPDA@MGO showed specific recognition toward BPA with a high imprinting factor of 3.2 compared with nonimprinted polymer. The capacity of IPDA@MGO toward BPA was 41.2 mg/g and the adsorption reached equilibrium within 30 min. The adsorption agreed well with the Freundlich and pseudo-second order kinetic models. The good adsorption performance was attributed to the abundant binding sites and good dispersibility of IPDA@MGO nanocomposites derived from its excellent hydrophilicity. The nanocomposites could be removed rapidly by an external magnet and regenerated for repeated adsorption of BPA in water. The proposed method has potential applications for efficient removal of BPA in environmental waters.
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高影响因子
危险品化学品经营许可证（带存储）