JOURNAL OF MATERIALS SCIENCE
·
2026
·Vol. 61
·期 42
·32799-32819
·
IF 4.4
Yang Lutao,Zhou Chuanchen,Zhang Fang,Yang Jie,He Lei,Zhang Jun
Given the ongoing global demand for oil, polymer–surfactant binary flooding technology plays a key role in enhancing oil recovery. However, in high-temperature, high-salinity, and high-calcium/magnesium reservoirs, traditional binary flooding systems face limitations due to thermal degradation, salt sensitivity, and formation adsorption, significantly reducing their effectiveness. In this study, a novel magnetic nanocomposite, BS@Fe 3 O 4 /MOF, was synthesized using Cu-based metal–organic framework (Cu-MOF)-doped Fe 3 O 4 magnetic nanoparticles and functionalized with dodecyldimethyl betaine (BS-12). The nanocomposite effectively removed Ca 2+ and Mg 2+ ions. Emulsification tests optimized the binary surfactant/polymer (SP) flooding system with octylphenol ethoxylate (OP-10) and xanthan gum (XG) and verified the feasibility of constructing the SP-BS@Fe 3 O 4 /MOF system. The system showed strong tolerance to high temperatures, salinity, and varied pH environments, with a substantial increase in viscosity and ultra-low interfacial tension in crude oil. Adsorption loss was 14%, with separation rates of 8.28% for the nanocomposite and 17.86% for XG. Oil recovery tests showed an 8.22% improvement, and magnetic recovery added another 3.75%. Overall, BS@Fe 3 O 4 /MOF enhances binary flooding, providing a strategic solution for field application challenges.
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高影响因子
ANALYTICAL SCIENCES
·
2026
·
IF 2
Cheng Shipei,Liang Jinhua,Huang Guidan,Ye Hongying,Yang Mengdan,Lin Bingjian,Nie Jinfang,Zhu Wenyuan,Zhang Yun
A novel colorimetric sensing platform was developed for rapid detection of L-cysteine (L-Cys) in human serum and milk samples, utilizing L-glutamic acid-coated Fe 3 O 4 quantum dots (Glu-Fe 3 O 4 QDs) with enhanced peroxidase-like activity. The Glu-Fe 3 O 4 QDs were synthesized via a two-step hydrothermal method, where L-glutamic acid modification significantly improved both catalytic performance and stability compared to unmodified Fe 3 O 4 nanoparticles. Characterization by TEM, XPS, and FTIR confirmed the ultrasmall size (2.57 ± 0.78 nm) and successful surface functionalization with carboxyl/amino groups. The nanozymes catalyzed the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) in the presence of H 2 O 2 , generating a blue color change measurable at 652 nm. L-Cys suppressed this reaction by competitively consuming hydroxyl radicals, enabling quantitative detection with a linear range of 5–50 µM (R 2 = 0.997) and a low detection limit of 0.73 µM. The method exhibited high selectivity against interfering amino acids and ions, and achieved recoveries of 96.99–107.59% in spiked serum and milk samples with RSDs < 3.86%. This work provides a simple, cost-effective tool for monitoring L-Cys in complex biological matrices, with potential applications in food safety and clinical diagnostics. Graphical abstract The alternative text for this image may have been generated using AI. Ultrasmall L-glutamic acid-coated Fe3O4 quantum dots (Glu-Fe3O4 QDs) were synthesized, exhibiting enhanced peroxidase-like activity that catalyzes TMB-H2O2 chromogenic reaction. The system enables rapid colorimetric detection of L-cysteine in human serum and milk with high selectivity and a detection limit of 0.73 μM
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ENVIRONMENTAL TECHNOLOGY
·
2022
·
IF 3.475
Chun-Feng Wang,Yue-Yi Li,Ai-Hong Li,Nan Yang,Xiao-Wen Wang,Yin-Ming Li,Ye Zhang
In this study, the significant iron-based material, hydroxyl-functionalized ball-milled zero-valent iron/Fe3O4 (HFB-ZVI/Fe3O4) was employed for the experiments. The performance of the Electro + HFB-ZVI/Fe3O4 + Oxone system for the degradation of chemical oxygen demand (COD) in antibiotic wastewater was investigated. A direct current was applied between a graphite plate anode and two iron plate cathodes, and a series of operational parameters, such as applied electric current, the dosage of HFB-ZVI/Fe3O4 composite, the dosage of Oxone, and initial solution pH, were explored to evaluate the oxidation process. The application of electric current enhanced the gradual degradation of COD and the increase of current intensity accelerated COD degradation. The neutral condition was favourable for the rapid degradation of COD in a short reaction time by the Electro + HFB-ZVI/Fe3O4 + Oxone process and promoted the degradation efficiency of COD. An increase of electric current gradually decreased the reaction solution pH, the larger the electric current applied in the reaction process, the lower the final pH of the reaction solution. Under the optimal experimental conditions (1 g/L HFB-ZVI/Fe3O4 composite, 0.3 g/L Oxone, current intensity = 500 mA, initial solution pH = 7.85), Electro + HFB-ZVI/Fe3O4 + Oxone achieved 99% COD degradation in antibiotic wastewater. Radicals quenching experiments indicated the contribution to COD degradation by hydroxyl radicals (HO•), sulphate radicals (SO4•–) and other oxidants were 66.03%, 24.014% and 9.756%, respectively. The possible mechanism of COD degradation in the Electro + HFB-ZVI/Fe3O4 + Oxone system was also discussed in this study. The findings in this work provided useful information for the treatment of wastewater.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Lili Bo,Fang Nian,Lumei Pu,Ping Li,Yusen Hu,Jinhui Tong
Hybrids of α-Fe 2 O 3 /Fe 3 O 4 nanoparticles embedded in N doped graphitic carbon polyhedron layered arrays (FeO x /NCLA) were simply constructed by pyrolyzing the composite precursor of NH 2 -MIL-101(Fe) (a metal organic framework, MOF) and glycylglycine. The experimental and calculated results reveal that the obtained catalysts exhibited multiple active components, synergistic heterojunction effect, high BET surface areas and conductivity, and consequently greatly improved intrinsic electrocatalytic activities and kinetics for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). As the results, the optimized catalyst FeO x /NCLA-1.2 exhibited positive half-wave potential of 0.846 V for ORR and only 218 mV of overpotential (at 10 mA/cm 2 ) for OER in alkaline electrolyte, which is superior than Pt/C (20 %) and RuO 2 , respectively. The Zn-air battery (ZAB) employing the FeO x /NCLA-1.2 as electrocatalyst obtained a peak power density of 104.3 mW·cm −2 , a specific capacity of 840 mAh·g Zn -1 and an energy density of 890 Wh·kg Zn -1 , which is also much higher than that for the noble metal based one. The catalyst is promised to be applied in water electrolysis, fuel cells and metal-air batteries.
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Sustainability
·
2022
·Vol. 14
·期 24
·16419
·
IF 3.889
Zhiwei Wang,Shijun Zhu,Jing Deng,Haojie Li,Liang Wang,Haojin Luo,Zehe Tang,Xueyan Li
Iron-rich sludge, generated during flocculation/sedimentation processes by using Fe-based coagulant in drinking water treatment plants, could be used as a precursor to prepare an effective peroxymonosulfate (PMS) activator (Fe3O4@SiO2) for the ciprofloxacin (CIP) degradation via facile hydrothermal treatment. The catalytic performances of raw iron-rich sludge and Fe3O4@SiO2were evaluated. The removal rate of CIP in Fe3O4@SiO2/PMS system increased from 44.7% to 82.8% within 60 min compared with the raw iron-rich sludge. The effects of PMS, catalyst loadings, temperature, and initial pH on the CIP degradation were examined, demonstrating that acidic conditions and higher temperatures were beneficial for CIP degradation. Both sulfate radicals (SO4•−) and hydroxyl radicals (•OH) contributed to the CIP degradation, and SO4•−was predominated in the Fe3O4@SiO2/PMS system, which was confirmed by the result of electron paramagnetic resonance (EPR) analysis and radical quenching tests. The mechanisms of the PMS activation process by Fe3O4@SiO2were elucidated, and the influencing factors were among which the role of the iron mineral phase was emphatically explored. This study provides a facile method to convert the recycled waste iron-rich sludge to magnetic heterogeneous catalysts for CIP degradation with PMS activation.Keywords:iron-rich sludge;Fe3O4@SiO2catalyst;peroxymonosulfate activation;ciprofloxacin;waste recycling
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MICROCHIMICA ACTA
·
2022
·Vol. 189
·期 3
·1-10
·
IF 6.408
Wang Lijun,Zhou Hong,Wu Xue,Song Yanfei,Huang Yukun,Yang Xiao,Chen Xianggui
A novel colorimetric aptasensor has been developed for highly sensitive tetracycline (TC) detection based on the peroxidase-like activity of Fe 3 O 4 @Cu nanoparticles and “sandwich” oligonucleotide hybridization. The Fe 3 O 4 @Cu nanoparticles with high peroxidase-like activity were successfully synthesized under mild conditions. Then, a “sandwich” oligonucleotide hybridization probe (a short amino-modified complementary sequence of a portion of the TC aptamer (cDNA1), TC aptamers, and a long complementary to 5′ terminal TC aptamer sequence (cDNA2)) was created in 96-wells plates via DNA hybridization in the absence of TC from the detection system. The unique “sandwich” oligonucleotide hybridization probe adsorbed large numbers of Fe 3 O 4 @Cu nanozymes while further enhancing its peroxidase-like activity. Based on the 3,3′,5,5′-tetramethylbenzidine (TMB)-hydrogen peroxide (H 2 O 2 ) reporting system, the blue color of the solution decreased linearly with the increase of TC concentration, ranging from 10 −3 to 10 3 μg/L with an ultralow limit of detection (LOD) of 0.91 ng/L (2 pM). The proposed method was successfully applied to detect TC in spiked milk samples, with recoveries of 81.8 to 112%, demonstrating the excellent potential for highly sensitive TC detection in milk. Graphical abstract
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ENERGY & FUELS
·
2022
·
IF 4.654
Yingjun Xie,Weicai Zhang,Huimin Li,Junyu Chen,Hang Hu,Hanwu Dong,Yong Xiao,Yingliang Liu,Yeru Liang,Mingtao Zheng
As an abundant agricultural process residue, lychee seeds are generally disposed of as waste because their practical utilization has been limited to a narrow range of low-value items. It is of great interest and highly desirable to explore a new conversion way from waste lychee seeds to high-value materials. Herein, natural polyphenols are directly extracted from waste lychee seeds and utilized as precursors of a state-of-the-art Fe3O4/carbon composite for high-performance lithium-ion batteries. The polyphenols are first extracted from waste lychee seeds and then coordinated with metal ions to assemble an inorganic–organic hybrid coated on a carbon nanotube substrate. After high-temperature carbonization, metal oxide/carbon composites are obtained. The as-prepared Fe3O4/carbon composite possesses a unique hierarchical structure including a distinctively heterogeneous carbonaceous skeleton comprised of a graphitic core and an amorphous shell and an intimate binding at the Fe3O4/carbon interface. Benefiting from the as-constructed beneficial structure, the hierarchical CNT@Fe3O4/C composite, selected as a proof-of-concept product, shows impressive electrochemical performances when used as an advanced anode material of lithium-ion batteries. This work provides a promising sustainable way for converting waste lychee seeds to high additional value materials and as well sheds light on the realization of advanced energy-storage devices besides lithium-ion batteries.
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CHEMOSPHERE
·
2022
·
IF 8.943
Huiwang Dai,Xiaozeng Miao,Jianxi Zhu,Jianxin Chen
The redox cycle of iron is a well-known rate-determining step for hydroxyl radical generation in photo-Fenton system. In this study, oxalate was employed as regulator to enhance the degradation of Orange II in Fe 3 O 4 magnetic nanoparticles (NPs)-catalyzed heterogeneous UV-Fenton system. Results showed that the oxalate could interact with the surface ≡Fe III species of catalyst, which weakened the bond of ≡Fe III –O and promoted the leaching of iron ions. Then the redox cycle of iron and generation of HO· would be accelerated via the homogeneous UV-Fenton reaction. The degradation rate constant of Orange II reached 0.220 min −1 when additional oxalate concentration was 0.4 mM, which was 2.5 times as high as that without oxalate in heterogeneous UV-Fenton system. In this case, the removal efficiencies of color and TOC were 99.3% and 92.0% after 30 and 120 min treatment, respectively. In addition, based on the results of XRD and XPS characterization, it could be deduced that the crystal structure and elemental configuration of Fe 3 O 4 magnetic nanoparticles could be maintained after reaction. Besides, the results of FTIR and magnetization characterization indicated that the C 2 O 4 2− on surface of catalyst could be degraded and the catalyst could be easily separated from aqueous by applying an external magnetic field. The Fe 3 O 4 magnetic nanoparticles showed high catalytic stability and reusability under the regulation of oxalate due to the fact that the leached iron ions could be re-adsorbed on the catalyst after treatment.
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LANGMUIR
·
2021
·
IF 3.882
Jingxian He,Fang Liu,Chaohu Xiao,Hanxue Sun,Jiyan Li,Zhaoqi Zhu,Weidong Liang,An Li
Solar steam generation has been considered as one of the most promising strategies for production of fresh water using renewable solar energy. Herein, we prepared a polymer porous foam (HPSS) by a facile hydrothermal method. The HPSS presents a superhydrophilic wettability, an interpenetrating macroporous structure, and low thermal conductivity, which can well satisfy the criteria as an ideal candidate for photothermal materials. The HPSS/Fe3O4/PPy (polypyrrole) evaporator, of which a Fe3O4/PPy binary optical system served as a light absorption layer and HPSS was used as a porous substrate, was constructed through in situ growth of Fe3O4 particles followed by interfacial polymerization of PPy on the surface of HPSS. HPSS/Fe3O4/PPy shows an excellent light absorption capacity (92%) and photothermal conversion performance, with the solar energy conversion efficiency reaching up to 94.7% under 1 sun irradiation, which is much higher than that of HPSS/PPy (84.8%) composed of a unitary PPy light absorption layer. Interestingly, the presence of Fe3O4 particles could make directional migration in a magnetic field possible, thus facilitating its recovery as a self-floating solar generator in an open water area. Moreover, the HPSS/Fe3O4/PPy evaporator displays outstanding salt resistance properties and stability in various saline solutions, thus having great potential in practical desalination.
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Analytical Methods
·
2021
·Vol. 13
·期 37
·4320-4327
·
IF 2.896
Ying Zhang,Yuhan Ning,Wanliang Liao,Weiping Wang,Ai-Jun Wang
In this work, COF-LZU1@PEI@Fe3O4 was synthesized by immobilization of COF-LZU1 onto the surface of polyethyleneimine-functionalized Fe3O4 nanoparticles (PEI@Fe3O4) and employed as an adsorbent for magnetic dispersive micro-solid phase extraction of tetracyclines (TCs). COF-LZU1@PEI@Fe3O4 was characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction and nitrogen adsorption–desorption isotherms analysis. The optimal extraction and desorption conditions were as follows: 15.00 mL sample solution (pH 7.0) extracted with 5.0 mg of adsorbent for 30 min at 30 °C, and then desorbed with 1.50 mL methanol/acetonitrile/0.02 mol L−1 oxalic acid solution (v/v, 1 : 2 : 7). Good linearities were obtained between the peak area and TC concentration ranging from 5–500 μg L−1 with correlation coefficients (R2) higher than 0.9992 and limits of detection lower than 0.51 μg L−1. The relative standard deviations (RSDs) of intra-day and inter-day were less than 5.7% and 7.4%, respectively. The developed method was successfully applied to the determination of TCs in environmental water samples with recoveries in the range of 87.0–113.8% and RSDs less than 5.1%, suggesting great potential of COF-LZU1@PEI@Fe3O4 for efficient extraction and analysis of trace TCs in water samples.
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MICROCHIMICA ACTA
·
2021
·Vol. 189
·期 1
·1-10
·
IF 5.833
Xing Yanyan,Chen Meiling,Zhao Yunkun,Xu Jiabi,Hou Xiaohong
Novel Fe 3 O 4 @C@MnO 2 composites were successfully synthesized for the first time via an interfacial reaction between magnetic porous carbon and KMnO 4 , in which the magnetic porous carbon was derived from the pyrolysis of Fe-MIL-88A under N 2 atmosphere. Interestingly, the obtained Fe 3 O 4 @C@MnO 2 composites were found to have triple-enzyme mimetic activity including peroxidase-like, catalase-like, and oxidase-like activity. As a peroxidase mimic, Fe 3 O 4 @C@MnO 2 composites could catalyze the oxidation of TMB into a blue oxidized product by H 2 O 2 . As a catalase mimic, Fe 3 O 4 @C@MnO 2 could catalyze the decomposition of H 2 O 2 to generate O 2 and H 2 O. As an oxidase mimic, Fe 3 O 4 @C@MnO 2 could catalyze the direct oxidation of TMB to produce a blue oxidized product without H 2 O 2 . Reactive oxygen species measurements revealed that the oxidase-like activity originated from 1 O 2 and O 2 − ∙and little∙OH generated by the dissolved oxygen, which was catalyzed by the Fe 3 O 4 @C@MnO 2 in the TMB oxidation reaction. The oxidase-like activity of Fe 3 O 4 @C@MnO 2 was investigated in detail. Under the optimized conditions, a rapid, sensitive, visual colorimetric method for dopamine detection was developed based on the inhibitory effect of dopamine on the oxidase-like activity. The proposed method allows for dopamine detection with a limit of detection of 0.034 μM and a linear range of 0.125–10 μM. This new colorimetric method was successfully used for the determination of dopamine in human blood samples. Graphical abstract
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高影响因子
RENEWABLE ENERGY
·
2021
·
IF 8.001
Jianmei Cen,Enjun Jiang,Yuqing Zhu,Zhenyu Chen,Panagiotis Tsiakaras,Pei Kang Shen
Herein, two novel electrocatalysts are simultaneously grown on Ni foam (NF) through a one-step hydrothermal method . The as-prepared Ru–MoO 3- x NF exhibits good performance for HER with low overpotentials of 12 mV at 10 mA cm −2 and 49 mV at 100 mA cm −2 , a low Tafel slope of 32.96 mV dec −1 , as well as an excellent durability at least lasting 17 h in alkaline media . The Fe 3 O 4 –NiFe LDH NF (layered double hydroxide nickel foam) ultrathin nanosheets electrode shows a low OER overpotential of 216 mV at 10 mA cm −2 and a small Tafel slope of 42.42 mV dec −1 . Moreover, a two-electrode water splitting device is fabricated with Ru–MoO 3- x NF as cathode and Fe 3 O 4 –NiFe LDH NF as anode, it only requires 1.46 V at 10 mA cm −2 and exhibits a long term durability without obvious loss of activity after continuously operating for 180 h. The superior catalytic behavior should be originated from the open heterostructure and oxygen vacancies with high intrinsic activity, abundant exposed active sites, and fast charge transfer. This work provides a new strategy to design heterostructure and transition metal oxides catalysts with improved catalytic activity and durability by a facile route for overall water splitting or other applications.
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危险品化学品经营许可证（带存储）