SEPARATION AND PURIFICATION TECHNOLOGY
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2025
·
IF 9
Zi-han Chang,Xing-yu Long,Jing-wen Gu,Mei Zhang,Jiang-qun Zhang,Ting-mei Wang,Yan Zhang,Hui Xie,Yang Li,Pin-hua Xia
Based on the unique affinity interaction between amino (NH 2 ) and metal oxides (MOs) with phosphate groups (PO 4 3− ), herein, Fe 3+ , Fe 2+ and Sm 3+ were respectively usedas metal ion source, polyethyleneimine (PEI) as functional monomer, together with ammonia as precipitant to prepare a novel PEI-functional magnetic rare earth samarium metal oxide composite nano material (PEI/Fe 3 O 4 -Sm 2 O 3 , denoted as PFS) using a “one pot method” for the adsorption study of simulating high concentration glyphosate (GLY) in waterbodies emergency pollution. Consequently, the PFS adsorbent was characterized and analysed successfully using techniques such as SEM, TEM, EDS, BET, XRD, XPS, VSM and so on. A single-factor adsorption experiment was performed to explore how factors like the initial concentration of GLY ( C 0 ), solution pH, adsorbent dosage ( m ), and oscillation time affect PFS's adsorption of GLY. Under the optimized conditions, the adsorption of GLY by PFS could reach up to 92.3 % with a maximum saturated adsorption capacity Q max = 178.5 mg/g. Furthermore, PFS had a certain recyclability after 4 cycles adsorption-desorption of GLY. In addition, the Langmuir model ( R 2 = 0.962) could be better described the adsorption process as examined by isothermal adsorption modelling. The kinetic model fit the pseudo-secondary dynamics well ( R 2 = 0.999), and the adsorption process was spontaneous and endothermic. Besides, we the possible mechanisms of GLY adsorption by PFS were preliminarily explored, which was synergistically promoted by three main adsorption mechanisms, including electrostatic interaction and hydrogen bonding as well as covalent bonding. Morever, PEI-functional magnetic nano-Sm 2 O 3 with high affinity was first used as an adsorbent for GLY due to the synergistic interaction between Sm 2 O 3 and -HPO 3 − , NH 4 + and -HPO 3 − /-COO − . Finally, PFS was used to remove residual GLY in real world water environment (Baiyun lake, Siya river and farmland water) using a convenient and rapid magnetic separation process. The adsorption and removal of GLY in adding standard samples experiments on different substrate waters were above 95 % and could avoid the adverse effects of GLY residues on the aquatic environment. The above results indicated that PEI/Fe 3 O 4 -Sm 2 O 3 , which is a new and excellent nano adsorbent, exhibits a excellent adsorption capacity for GLY, demonstrating a large potential for practical water applications, especially for urgently water bodies polluted with high concentrations of GLY.
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高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Jiawen Wang,Ruizhe Wang,Pan Li,Pengxiang Zhang,Xiaofeng Zhang,Yanyan Liu,Xianli Wu,Baojun Li
Developing cost-effective and efficient bifunctional oxygen electrocatalysts remains a critical challenge for advancing rechargeable Zn-air batteries (ZABs). Here, a novel bifunctional oxygen electrocatalyst, FeP 4 /Fe 3 O 4 @NWC, was obtained by coupling N-doped biomass-derived carbon and interface of FeP 4 /Fe 3 O 4 through electric field-induced deposit and pyrolytic phosphorus conversion. This catalyst exhibits exceptional bifunctional performance with a low oxygen reduction/evolution reaction potential gap (Δ E = 0.61 V), surpassing commercial Pt/C and RuO 2 . The rechargeable ZABs based on FeP 4 /Fe 3 O 4 @NWC as cathode catalyst achieve a high open-circuit voltage (1.496 V), peak power density (185 mW cm −2 ), and long-term stability (290 h). Quasi-solid-state ZABs further demonstrate 66 h of stable cycling and a specific capacity of 747.6 mAh g Zn −1 . The biomass-derived 3D (three-dimensional) carbon matrix with hierarchical porous architecture assures high stability, excellent conductivity and high exposure of active sites for catalyst. The synergistic effect of FeP 4 and Fe 3 O 4 optimizes charge transfer and reaction kinetics for oxygen electric reaction. The coupling N-doped carbon and interface of FeP 4 /Fe 3 O 4 regulates electronic structure of active sites and optimizes activation energy of reactants to enhance bifunctional oxygen electrocatalytic activity. This work proposes a novel strategy for designing high performance biomass-derived bifunctional oxygen electrocatalysts by creating interface of transition metal composites and coupling it with N-doped carbon to offer a promising pathway for next-generation energy storage technologies.
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高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2026
·
IF 2.8
Wu Wei,Ma Xiaoqian,Wang Rui,Hao Mengqi
View large Download slide View large Download slide Close modal This paper delves into the impact of electrostatic interaction and wettability of MNPs on the efficiency of demulsifiers. Fe 3 O 4 magnetic nanocomposites (Fe 3 O 4 /HA/PDDA/OLA MNPs, S1–S5) were synthesized with varying wettability and zeta potential by adjusting the surface modification ratio of poly-dimethyl-diallyl-ammonium chloride (PDDA) and oleylamine (OLA). S1–S5 were then used to demulsify O/W (hexadecane) nanoemulsions. The oil/water separation efficiency (SE) initially increased (S1–S4) and then decreased (S4–S5) with their increasing water contact angles (WCA). S4 with a WCA about 90° exhibited the maximum SE, although S4 has a negative charge and shows electrostatic repulsion with oil droplets, indicating that the wettability of MNPs, rather than electrostatic interaction, played a dominant role in demulsification. Adsorption energy of S1–S5 at the water–oil interface aligned with the variation in their demulsification efficiency. Based on previous reports, a possible demulsification mechanism was proposed. Hydrogen bond and hydrophobic long chains present in PDDA and OLA increased the interfacial activity of S4, which facilitated the spontaneous migration of MNPs to the interface of oil and water. With oil droplet aggregation by magnetic recovery, a good oil–water separation performance was achieved. The study provides a theoretical foundation for the design and synthesis of magnetic demulsifiers. Wettability of MNPs plays a crucial role in demulsification performance. Surface charge of MNPs shows less function than wettability. MNPs with a WCA of approximately 90° showed the maximum demulsification efficiency. The study provides a theoretical foundation for the design and synthesis of magnetic demulsifiers.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Qiye Lu,Jing Liu,Guanyi Chen,Beibei Yan,Zhanjun Cheng,Weiming Yi
Conventional biodiesel production relies on external heating, requiring high temperatures and strict control over system water content. This work prepared a magnetic lignin-based heterogeneous acid catalyst Fe 3 O 4 -LS/100-Al using sodium lignosulfonate as support via co-precipitation and impregnation, with Lewis acid sites, and applied it in electrolysis-assisted esterification for biodiesel. The catalyst showed a specific surface area of 115.63 m 2 /g and saturation magnetization of 29.98 emu/g, enabling efficient acid loading and rapid magnetic separation. Under RSM-optimized conditions (catalyst of 6.8 wt%, MOAMR of 12.5:1, voltage of 45.4 V, water content of 4.7 wt%), oleic acid conversion reached 95.25%. Low activation energy (36.04 kJ/mol) confirmed high catalytic activity, and 71.38% conversion was retained after seven cycles. Results prove electrolysis assistance enables efficient, ambient-temperature biodiesel synthesis.
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高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2020
·Vol. 83
·期 2
·435-448
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IF 1.638
Wu Lang,Luo Zhengwei,Jiang Hui,Zhao Zijian,Geng Wenhua
Fe 3 O 4 nanoparticles-based magnetic Mo(VI) surface ion-imprinted polymer (Mo(VI)-MIIP) was elaborated employing 4-vinyl pyridine as a functional monomer. The adsorbent preparation was confirmed by Fourier-transform infrared spectroscopy, scanning electron microscopy, energy dispersive X-ray spectrometry, X-ray diffraction, vibrating sample magnetometer, thermogravimetric analysis, and surface area analysis. Batch adsorption experiments showed that the maximum adsorption capacity of Mo(VI)-MIIP was 296.40 mg g −1 at pH 3, while that of the magnetic non-imprinted polymer (MNIP) was only 147.10 mg g −1 . The adsorption isotherm model was well fitted by the Langmuir isotherm model. The adsorption experiments revealed that Mo(VI)-MIIP reached adsorption equilibrium within 30 min, and the kinetics data fitting showed that the pseudo-second-order kinetics model suitably described the adsorption process. Mo(VI)-MIIP exhibited an excellent adsorption selectivity to Mo(VI) in binary mixtures of Mo(VI)/Cr(VI), Mo(VI)/Cu(II), Mo(VI)/ , Mo(VI)/Zn(II), and Mo(VI)/I – , with relative selectivity coefficients toward MNIP of 13.71, 30.27, 20.01, 23.53, and 15.89, respectively. After six consecutive adsorption-desorption cycles, the adsorption capacity of Mo(VI)-MIIP decreased by 9.5% (from 228.4 mg g −1 to 206.7 mg g −1 at initial Mo(VI) concentration of 250 mg L −1 ), demonstrating its reusability. Magnetic surface ion-imprinted polymer was synthesized for rapid and selective removal Mo(VI) from aqueous solution. The effects of pH value, contact time and initial concentration on the adsorption process were investigated. Mo(VI) adsorption followed the pseudo-second-order kinetics and Langmuir isotherm model. Magnetic surface ion-imprinted polymer showed high selectivity for Mo(VI) in the presence of competitive ions.
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高影响因子
JOM
·
2026
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IF 2.3
Jia Boshuai,Wang Zhanli,Wang Liping,Li Baoe,Liu Shimin,Yang Tai,Wang Donghui,Liang Chunyong,Wang Hongshui
The infections associated with dental and orthopedic implants always result from the biofilm of bacterial colonization, leading to implant failure, prolonged hospitalization, and increased healthcare costs. Iron oxide (Fe 3 O 4 ) nanoparticles and indocyanine green (ICG) are both reported to have good antibacterial properties. However, the anti-biofilm efficiency of either component alone is still unsatisfactory. In this paper, octahedral Fe 3 O 4 nanoparticles (O-Fe 3 O 4 ) were synthesized and integrated with ICG to achieve the best biofilm removal effect, and the optimized ratio between the Fe 3 O 4 and ICG was also investigated. The results showed that ICG inhibited the magnetic properties of Fe 3 O 4 slightly (from 92 emu/g to 76 emu/g); however, it endowed Fe 3 O 4 with significantly improved photothermal, photodynamic, and peroxidase-like activities, achieving excellent antibacterial property (eradicating more than 99% of S. aureus under the combination of H 2 O 2 treatment and laser irradiation). Combined with the good cytocompatibility (cell viability > 80% at a concentration of 250 μg/mL), the synthesized O-Fe 3 O 4 @ICG nanoparticles (especially O-Fe 3 O 4 @ICG-10) have strong application potential for synergistic therapy against biofilm infection associated with dental and orthopedic implants. This study presents a promising nano-antibacterial system for combating resistant biofilm infections, offering insights into the rational design of synergistic nanotherapeutics for clinical applications.
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高影响因子
APPLIED SURFACE SCIENCE
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2022
·
IF 7.392
Tong Ding,Wenxiao Zhao,Yuqing Sun,Shilong Li,Tianxiang Yu,Wenheng Jing
In this work, a novel 2D Fe 3 O 4 -MnO 2 hollow fiber ceramic membrane (HFCM) with both excellent separation performance and high catalytic activity was constructed. The Fe 3 O 4 nanoparticles were deposited on 2D MnO 2 nanoplates to increase the Mn 3+ content, and then the nanoplates were pressure-driven and sintered on the surface of the hollow fiber ceramic supports to obtain 2D Fe 3 O 4 -MnO 2 -HFCMs. Electron spin resonance analysis confirmed that hydroxyl radicals and superoxide radicals played a major role in oxidative degradation and tetracycline hydrochloride (TCH) removal was 86.9 %. Noteworthily, TCH was concentrated on the membrane interface due to the concentration polarization effect, which increases the probability of binding free radicals from the catalytic membrane layer, thus enhancing the catalytic performance and the anti-fouling capability of the membrane. The 2D Fe 3 O 4 -MnO 2 -HFCM can be applied in wastewater treatment due to its superior catalytic ozonation activity and high separation performance.
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高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Wenlai Xia,Xuelin Wang,Dongning Liu,Chenjian Li,Jian Xie,Chuanxi Xiong
Owing to the large surface energy and easy agglomeration, ferroferric oxide (Fe 3 O 4 ) nanoparticle usually is difficult to be widely application in microwave absorbing coatings. In this paper, a new synthesis process was used to prepare solvent-free fluid Fe 3 O 4 (S-Fe 3 O 4 ) by surface modification of solid Fe 3 O 4 with a long chain of organic bimolecular layer, which showed excellent dispersion in resin materials. Moreover, S-Fe 3 O 4 was compounded with CNT@Fe 3 O 4 to prepare S-Fe 3 O 4 /CNT@Fe 3 O 4 /EP composites, which realized the multiple loss mechanism of electromagnetic wave (EMW) absorption. The results showed that the minimum reflection loss of composite was −52.57 dB with a matching thickness of 3.3 mm; the maximum effective absorption bandwidth at 1.4 mm thickness was 5.2 GHz (12.08–17.28 GHz). This surface molecular engineering composite based on inorganic particles enhanced the attenuation ability of EMW by improving the dispersion of inorganic particles and providing multiple loss mechanisms, which was a novel medium regulation strategy to provide a new insight for nanoparticles in the field of EMW absorbing coatings.
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高影响因子
Separations
·
2022
·Vol. 10
·期 1
·4
·
IF 3.344
Hongmei Zhou,Junhui Zhang,Aihong Duan,Bangjin Wang,Shengming Xie,Liming Yuan
A new facile strategy was designed to prepare the phenyboronic acid-functionalized Fe3O4magnetic nanoparticles (Fe3O4@PBA) via direct silanization and thiol-ene click chemistry for the selective adsorption of ortho-dihydroxy-containing compounds. The three kinds of Fe3O4@PBA nanoparticles obtained showed excellent adsorption capacity and selectivity for ortho-dihydroxy-containing compounds including adenosine ando-dihydroxybenzene. Among them, the Fe3O4@MPS@MPBA exhibited the highest adsorption capacity and selectivity for adenosine ando-dihydroxybenzene, followed by Fe3O4@MPTES@AAPBA and Fe3O4@MPTES@VPBA. A synthesis method of superparamagnetic and boronate affinity nanocomposites with mild reaction conditions and simple process has been developed, which also provides a novel way for the synthesis of other types of enrichment materials of ortho-dihydroxy-containing compounds.Keywords:phenyboronic-acid-functionalized;Fe3O4magnetic nanoparticles;ortho-dihydroxy-containing compounds
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Zhengwen Wei,Yifan Du,Xiang-fei Lü,Wei Wang,Roberta Del Sole,Giuseppe Mele,Zhen-Yi Jiang
Ascribing to the serious environmental and health risks caused by phenanthrene (PENE) and its dangerous degradation intermediate, 9-phenanthrol (9-PENE), solving their contamination problem was extremely urgent. In this work, a novel Fe 3 O 4 -terephthalaldehyde (Fe 3 O 4 -TERE) magnetic nanomaterial was fabricated by introducing aromatic rings onto Fe 3 O 4 nanoparticles through encapsulation and grafting technique. The Fe 3 O 4 core provided convenience for the subsequent recycling and regeneration. The grafted aromatic carbons could act as adsorption active sites to form π–π interaction with PENE/9-PENE’s aromatic rings, thus improving the capture performance. The properties of the prepared magnetic nanomaterials were investigated via multiple characterization techniques. As expected, the Fe 3 O 4 -TERE could be utilized for effectively reducing the contamination risk of PENE and 9-PENE. Furthermore, the Fe 3 O 4 -TERE possessed with excellent regeneration performance. The abundant homogeneous reaction sites of Fe 3 O 4 -TERE provided possibility for the monolayer adsorption of PENE and 9-PENE. There were multiple microscopic interactions and driving forces jointly or individually participated the multi-stage adsorption reaction. Moreover, density functional theory calculations not only analyzed the validity and existence form of the π–π interaction under different adsorption configuration modes, but also provided deeply perspectives related to the microscopic bonding mechanism. This work proposed a promising fabrication strategy for magnetic nanomaterials used for removing and remediation of polycyclic aromatic hydrocarbons contamination, as well as provided profound theoretical perspectives for analyzing the adsorption mechanism.
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高影响因子
Arabian Journal of Chemistry
·
2023
·
IF 6
Qingrong Han,Fei Liu,Chengjiu Wang,Zhentao Tang,Cheng Peng,Yuzhu Tan
In recent years, the quality and safety issues of Chinese medicinal herbs have received great attention worldwide. Thereinto, heavy metal contamination has been one of the most serious concerns. Compared to the wide research in the analysis of heavy metals in medicinal herbs, the studies on the removal of heavy metals are relatively limited. In this study, polyethylene glycol functionalized Fe 3 O 4 @MIL-101(Cr) (Fe 3 O 4 @MIL-101(Cr)@PEG) was designed and synthesized to remove heavy metals from the decoction of Ligusticum chuanxiong Hort. The in-house fabricated Fe 3 O 4 @MIL-101(Cr)@PEG was characterized by a porous structure and a large specific surface area. Then, the efficiency of the material for the removal of five heavy metals was tested under optimal adsorption conditions. Meanwhile, the content of Senkyunolide A, Senkyunolide I, and Ferulic acid, the solid content, and the HPLC fingerprints similarity were used as the quality monitoring indicators of Ligusticum chuanxiong Hort decoction before and after the heavy metal removal. Results showed that the magnetic nanomaterial had excellent removal efficiency for As 5+ (81.4 %), Cd 2+ (88.19 %), and Pb 2+ (83.79 %) and certain removal efficiency for Ni 2+ (51.59 %) and Zn 2+ (55.4 %) under the spiked concentration of 50 μg/mL. The content of Senkyunolide A, Senkyunolide I, and Ferulic acid were decreased by less than 8.00 % after the removal of heavy metals. Besides, the loss rate of solid content was only 0.18 %, and the fingerprints similarity was over 99.9 %. The results indicated that Fe 3 O 4 @MIL-101(Cr)@PEG could efficiently and selectively remove heavy metals from Ligusticum chuanxiong Hort without affecting its effective components. Due to the advantages of low-cost, simple manipulation, and good efficiency, the material can be recommended for heavy metals removal from the aqueous solutions of medicinal herbs, providing a new and promising application for the removal of exogenous contaminants in medicinal herbs.
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高影响因子
Analytical Methods
·
2022
·Vol. 15
·期 2
·221-227
·
IF 3.532
Xianyuan Xu,Jingfang Guo,Zhen Lei
A recyclable peroxidase mimic Fe3O4@polydopamine/Prussian blue (Fe3O4@PDA/PB) composite was facilely prepared by coating PDA on an Fe3O4 nanoparticle core and in situ growth of PB nanoparticles on a PDA shell. The prepared Fe3O4@PDA/PB composite exhibited excellent peroxidase-like activity and can catalytically oxidize the colorless colorimetric substrate 3,3′,5,5′-tetramethylbenzidine (TMB) into a blue colored product in the presence of H2O2 at 30 °C in 1 min. The catalytic mechanism was deduced to be the nanozyme-promoted generation of a hydroxyl radical (·OH), and the catalytic behavior followed the typical Michaelis–Menten kinetics. Based on Cr(VI)-boosted peroxidase-like activity of Fe3O4@PDA/PB, a simple and fast colorimetric method for detection of Cr(VI) was developed. Under the optimum conditions, the colorimetric method exhibited wider linear range (100 nM to 140 μM), low LOD (51.1 nM), good selectivity and short detection time (1 min). Moreover, the feasibility of the proposed colorimetric method was evaluated by determination of Cr(VI) in spiked tap water and lake water samples. Good recoveries (95.2–102.9%) and low relative standard deviations (RSDs) (1.6–4.4%) were obtained, showing great promise for practical use.
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PubMed
高影响因子
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