PLoS One
·
2014
·Vol. 9
·期 10
·e108647
·
IF 3.534
Yankai Du,Meishan Pei,Youjun He,Faqi Yu,Wenjuan Guo,Luyan Wang
Fe 3 O 4 (Fe 3 O 4 -CS) coated with magnetic chitosan was prepared as an adsorbent for the removal of Orange I from aqueous solutions and characterized by FTIR, XRD, SEM, TEM and TGA measurements. The effects of pH, initial concentration and contact time on the adsorption of Orange I from aqueous solutions were investigated. The decoloration rate was higher than 94% in the initial concentration range of 50–150 mg L −1 at pH 2.0. The maximum adsorption amount was 183.2 mg g −1 and was obtained at an initial concentration of 400 mg L −1 at pH 2.0. The adsorption equilibrium was reached in 30 minutes, demonstrating that the obtained adsorbent has the potential for practical application. The equilibrium adsorption isotherm was analyzed by the Freundlich and Langmuir models, and the adsorption kinetics were analyzed by the pseudo-first-order and pseudo-second-order kinetic models. The higher linear correlation coefficients showed that the Langmuir model (R 2 = 0.9995) and pseudo-second-order model (R 2 = 0.9561) offered the better fits.
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
LANGMUIR
·
2018
·
IF 3.789
Guangfa Zhang,Qinghua Zhang,Tiantian Cheng,Xiaoli Zhan,Fengqiu Chen
High durability, low cost, and superior anti-icing and active deicing multifunctional surface coatings, especially in the extreme environment, are highly desired to inhibit and/or eliminate the detriment of icing in many fields, such as automobile, aerospace, and power transmission. Herein, we first report a facile and versatile strategy to prepare novel slippery polyols-infused porous surfaces (SPIPS’s) with the inexpensive polyols as the lubricant liquids. These SPIPS’s are fabricated by a spray-coating approach based on amino-modified magnetic Fe3O4 nanoparticles (MNP@NH2) and amphiphilic P(poly(ethylene glycol) methyl ether methacrylate-co-glycidyl methacrylate) copolymer covalent cross-linked hybrids, followed by infusion with various polyols. The as-prepared surface exhibits excellent antifrosting property, that is, it can greatly postpone frost formation as long as 2700 s at −18 °C. Meanwhile, differential scanning calorimetry results clearly demonstrate that SPIPS’s show a remarkable freezing point depression capacity and the crystallization point of water can be decreased as low as −36.8 °C. The SPIPS also displays an extremely low ice adhesion strength (0.1 kPa) due to its unique surface characteristics. Moreover, outstanding active thermal deicing property is achieved for these slippery surfaces because of intrinsically photothermal effect of magnetic Fe3O4 nanoparticle. Hence, these results indicate that this kind of multifunctional bioinspired slippery surface, with superb stability, good cost effectiveness, and easy fabrication, can be used as a promising candidate for anti-icing and deicing applications.
研究领域:
材料科学
·
表面工程
·
能源与环境
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYHEDRON
·
2019
·
IF 2.284
Ning Tian,Yifang Dai,Qing Liu,Wei Dai
A general synthetic strategy for HS-Fe 3 O 4 @MIL-53(Al) adsorbent has been developed in this work. The composite material exhibits an efficient capture performance for rubidium ion due to sulfhydryl group and magnetic Fe 3 O 4 doped in its porous cavity. The results of X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, and N 2 adsorption–desorption proved that the HS-Fe 3 O 4 was immobilized in the composite material. High Rb + uptake capacity over the HS-Fe 3 O 4 @MIL-53(Al) is attributed to the exchange of acidic protons between the sulfhydryl group and the Rb + . The pseudo-second-order and Freundlich model could make a good description of the adsorption process. The Rb + sorption selectivity was moderately influenced by any co-ions effect (K + , Na + and Cs + ) due to HS-Fe 3 O 4 doped. These results reveal that our novel composite material might be a promising industrial adsorbent for Rb + capture.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2018
·Vol. 10
·期 6
·585
·
IF 2.935
Xiaoqiao Fan,Jinqiu Xiao,Wentao Wang,Yuang Zhang,Shufen Zhang,Bingtao Tang
Superparamagnetic materials have elicited increasing interest due to their high-efficiency magnetothermal conversion. However, it is difficult to effectively manage the magnetothermal energy due to the continuous magnetothermal effect at present. In this study, we designed and synthesized a novel Fe3O4/PEG/SiO2composite phase change material (PCM) that can simultaneously realize magnetic-to-thermal conversion and thermal energy management because of outstanding thermal energy storage ability of PCM. The composite was fabricated by in situ doping of superparamagnetic Fe3O4nanoclusters through a simple sol–gel method. The synthesized Fe3O4/PEG/SiO2PCM exhibited good thermal stability, high phase change enthalpy, and excellent shape-stabilized property. This study provides an additional promising route for application of the magnetothermal effect.Keywords:superparamagnetic Fe3O4nanocluster;magnetothermal conversion;phase-change material;thermal energy management
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 137
·期 15
·48546
·
IF 2.188
Lei Yang,Qi Fu,Heqing Fu
Magnetic Fe 3 O 4 /waterborne polyurethane nanocomposites were synthesized based on waterborne polyurethane (WPU) and amino-functionalized Fe 3 O 4 by in situ polymerization. The Fe 3 O 4 nanoparticle was found to be uniformly distributed in Fe 3 O 4 /WPU nanocomposites with linear or crosslinked structure. In addition, the formation mechanism and magnetic conduction mechanism of stable inorganic–organic nanocomposites were discussed. The experimental results showed that the thermal stability, magnetic, and mechanical properties of magnetic Fe 3 O 4 /waterborne polyurethane nanocomposites were improved by amino functionalized Fe 3 O 4 . Furthermore, the defoaming property of the emulsion and the hydrophobic property of magnetic Fe 3 O 4 /waterborne polyurethane nanocomposites were improved by the 1-hexadecanol-terminated prepolymer. What more, polycaprolactone (PCL)-based Fe 3 O 4 /WPU nanocomposites have excellent mechanical properties (The tensile strength is over 30 MPa, the elongation rate is above 300%.) and magnetic properties. Magnetic Fe 3 O 4 /waterborne polyurethane nanocomposites will be used in the field of hydrophobic and microwave absorbent materials. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 48546.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2018
·Vol. 18
·期 5
·3505-3510
·
IF 1.354
Guo Jian,Wang Yu,Liu Dan-Dan,Wan Rong,Han Guo-Zhi
We report a simple and green approach to synthesize stable water-dispersible silver nanoparticles decorated by magnetic Fe3O4 and graphene oxide (GO). These results of UV-Vis spectra, along with TEM and SEM indicated that the water-dispersible silver nanoparticles
had cluster flat structure and retained the optical properties of the original silver particle. Combining the advantages of Fe3O4 and GO, the composite nanoparticles showed enhanced catalytic activity with good recycling utilization rate by magnetic separation.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2015
·
IF 3.368
Manlin Wang,Peng Liu,Yu Wang,Dongmei Zhou,Chen Ma,Dongju Zhang,Jinhua Zhan
The effective recognition and enrichment of trace polychlorinated biphenyls (PCBs) in the environment are currently challenging issues due to human health concerns. In this paper, a surface absorptive layer coating superparamagnetic Fe 3 O 4 nanoparticles for PCBs enrichment were prepared. This protocol involved the synthesis of Fe 3 O 4 particles through a solvothermal reaction and the covering of a silica layer bonded β-cyclodextrin (β-CD) over Fe 3 O 4 via a sol–gel process to construct core–shell Fe 3 O 4 @β-CD composites. β-CD was linked covalently to Fe 3 O 4 nanoparticles to generate the binding sites, enhancing the stability of Fe 3 O 4 nanoparticles in water. Meanwhile, superparamagnetic Fe 3 O 4 core could be rapidly separated from matrix to simplify time-consuming washing extraction. The adsorption capacity of Fe 3 O 4 @β-CD composites to PCB28 and PCB52 in aqueous solutions was investigated. To estimate the theoretical binding site number of Fe 3 O 4 @β-CD, the obtained binding data were replotted according to Scatchard equation. The host–guest interaction between β-CD and PCBs were further examined with density functional theory (DFT) calculations. It provides theoretical evidence of β-CD as host molecule has a higher binding amount towards PCB-28 than PCB-52 on the basis of their optimized geometries and calculated complexation energies. The nanomaterial reported herein is an ideal candidate for various applications, including the recognition and removal of environmentally deleterious substances.
研究领域:
环境科学
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材料科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2016
·Vol. 134
·期 7
·
IF 1.866
Jie-Ping Fan,Dan-Dan Liao,Yan-Long Xie,Bing Zheng,Jia-Xin Yu,Ya-Hui Cao,Xue-Hong Zhang,Hai-Long Peng
A composite material (MIP@Fe 3 O 4 @GO) based on molecular imprinted polymer (MIP), superparamagnetic Fe 3 O 4 particles and graphene oxide (GO) was prepared by the chemical coprecipitation method, and used to simultaneously separate and enrich two alkaloids (evodiamine and rutaecarpine) in the extract of Evodiae fructus . The as-prepared MIP@Fe 3 O 4 @GO was characterized by Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), and vibrating sample magnetometer (VSM). The adsorption kinetics, isotherms, competitive adsorption, and reusability of MIP@Fe 3 O 4 @GO were also investigated. The results revealed that MIP@Fe 3 O 4 @GO was sensitive to the magnetic field and could be easily separated using an external magnet; MIP@Fe 3 O 4 @GO showed good recognition selectivity, as well as simultaneous enrichment and separation abilities for evodiamine and rutaecarpine in the extract of E. fructus with satisfactory recoveries. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 44465.
研究领域:
材料科学
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药物分析
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中药学
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2021
·Vol. 11
·期 9
·2177
·
IF 5.076
Easar Alam,Qiyan Feng,Hong Yang,Jiaxi Fan,Sameena Mumtaz,Farida Begum
In this study, iron oxide (Fe3O4) was coated with ZrO2, and doped with three rare earth elements((Y/La/Ce), and a multi-staged rare earth doped zirconia adsorbent was prepared by using uniform design U14, Response Surface methodology, and orthogonal design, to remove As3+and As5+from the aqueous solution. Based on the results of TEM, EDS, XRD, FTIR, and N2-adsorption desorption test, the best molar ratio of Fe3O4:TMAOH:Zirconium butoxide:Y:La:Ce was selected as 1:12:11:1:0.02:0.08. The specific surface area and porosity was 263 m2/g, and 0.156 cm3/g, respectively. The isothermal curves and fitting equation parameters show that Langmuir model, and Redlich Peterson model fitted well. As per calculations of the Langmuir model, the highest adsorption capacities for As3+and As5+ions were recorded as 68.33 mg/g, 84.23 mg/g, respectively. The fitting curves and equations of the kinetic models favors the quasi second order kinetic model. Material regeneration was very effective, and even in the last cycle the regeneration capacities of both As3+and As5+were 75.15%, and 77.59%, respectively. Adsorption and regeneration results suggest that adsorbent has easy synthesis method, and reusable, so it can be used as a potential adsorbent for the removal of arsenic from aqueous solution.Keywords:magnetic Fe3O4;uniform design;surface response methodology;multi-staged doping;arsenic (III & V) removal
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2013
·
IF 3.172
Xiaoshu Lv,Xiaoqin Xue,Guangming Jiang,Donglei Wu,Tiantian Sheng,Hongyi Zhou,Xinhua Xu
Nanoscale Zero-Valent Iron (nZVI) assembled on magnetic Fe 3 O 4 /graphene (nZVI@MG) nanocomposites was synthesized for Cr(VI) removal from aqueous solution. nZVI particles were perfectly dispersed either among Fe 3 O 4 nanoparticles (Fe 3 O 4 NPs) or above the basal plane of graphene. This material shows Cr(VI) removal efficiency of 83.8%, much higher than those of individuals (18.0% for nZVI, 21.6% for Fe 3 O 4 NPs and 23.7% for graphene) and even their sum of 63.3%. The removal process obeys pseudo-second-order adsorption model, suggesting that adsorption is rate-controlling step. Maximum Cr(VI) adsorption capacity varies from 66.2 to 101.0 mg g −1 with decreasing pH from 8.0 to 3.0 at 30 °C. Negative Δ G and Δ H indicate spontaneous tendency and exothermic nature. Robust performance of nZVI@MG arises from the formation of micro-nZVI-graphene/nZVI-Fe 3 O 4 batteries and strong adsorption capability of broad graphene sheet/Fe 3 O 4 surfaces. Electrons released by nZVI spread all over the surfaces of graphene and Fe 3 O 4 , and the adsorbed Cr(VI) ions on them capture these floating electrons and reduce to Cr(III). Fe 3 O 4 NPs also served as protection shell to prevent nZVI from agglomeration and passivation.
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
Nanomaterials
·
2023
·Vol. 13
·期 6
·1111
·
IF 5.3
Wen-Xin Liu,Wei-Na Zhou,Shuang Song,Yong-Gang Zhao,Yin Lu
A new type of magnetic nanomaterial with Fe3O4as the core and organic polymer as the shell was synthesized by seed emulsion polymerization. This material not only overcomes the problem of insufficient mechanical strength of the organic polymer, it also solves the problem that Fe3O4is prone to oxidation and agglomeration. In order to make the particle size of Fe3O4meet the requirement of the seed, the solvothermal method was used to prepare Fe3O4. The effects of the reaction time, amount of solvent, pH value, and polyethylene glycol (PEG) on the particle size of Fe3O4were investigated. In addition, in order to accelerate the reaction rate, the feasibility of preparing Fe3O4by microwave was studied. The results showed that under the optimum conditions, the particle size of Fe3O4could reach 400 nm and had good magnetic properties. After three stages of oleic acid coating, seed emulsion polymerization, and C18 modification, the obtained C18-functionalized magnetic nanomaterials were used for the preparation of the chromatographic column. Under optimal conditions, stepwise elution significantly shortened the elution time of sulfamethyldiazine, sulfamethazine, sulfamethoxypyridazine, and sulfamethoxazole while still achieving a baseline separation.Keywords:solvothermal method;chromatographic packing materials;magnetic Fe3O4particles;C18-functionalized magnetic nanomaterials
研究领域:
化学
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED POWDER TECHNOLOGY
·
2016
·
IF 2.478
Li Zhou,Benzhao He,Fangming Wu,Jia Wu
In this paper, we report for the first time that metal oxide nanocrystals (MONs) including magnetic Fe 3 O 4 and luminescent ZnO nanocrystals can be facilely synthesized through a one-step reaction by using castor oil (CO) as both stabilizer and reaction solvent. The obtained MONs with relatively uniform size (2–5 nm) show high solution dispersibility and stability. The existence of CO components on the surfaces of MONs was confirmed by thermogravimetric analysis and FTIR characterizations. Benefiting from the presence of CO components, the MONs possess multiple surface hydroxyl groups that can be easily tailored. Moreover, the MONs exhibit favorable compatibility with polymer (e.g., poly(ethylene-co-vinyl acetate)) and can not only endow the polymer with magnetic or luminescent properties but also enhance the UV-shielding and mechanical properties of polymer. Considering the simple synthetic process and robust performance of the MONs, this study may open up new opportunities for the practical applications of MONs.
研究领域:
材料科学
·
纳米技术
✓ 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）