JOURNAL OF APPLIED POLYMER SCIENCE
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2022
·Vol. 139
·期 21
·52199
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IF 3.057
Wenjiao Wang,Mingming Zheng,Jiajia Ren,Mingliang Ma,Xunqian Yin,Tingxi Li,Yong Ma
Magnetic Fe 3 O 4 /MnO 2 /TiO 2 /polypyrrole (PPy) heterostructure as adsorbent for adsorbing Mn 7+ was synthesized by combining hydrothermal method and chemical oxidation method. The heterostructure was characterized by field-emission scanning electron microscope, Fourier transform infrared spectroscopy, X-ray diffraction, and vibrating sample magnetometer. Its saturation magnetization is 18.88 emu/g, so it is easy to separate it from the solution. The feasibility of Fe 3 O 4 /MnO 2 /TiO 2 /PPy heterostructure to remove Mn 7+ was researched in detail. It is found that the optimal pH is 2. The initial adsorption rate can reach 4.60 mg/g min. At 288.15 K, the maximum equilibrium adsorption capacity is 202.8 mg/g. Adsorption kinetics follows a pseudo second order model, as well as is determined by through membrane diffusion processes. The Langmuir isotherm model is used to describe the adsorption isotherm behavior. Besides, thermodynamic parameters indicate spontaneous adsorption behavior, and entropy of the endothermic reaction increases. Finally, the cycle test results show that the adsorbent has better cycle performance, displaying broad application prospects.
研究领域:
环境科学
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材料科学
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化学工程
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纳米技术
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污染控制
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高影响因子
RSC Advances
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2018
·Vol. 8
·期 65
·37417-37423
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IF 2.936
Jihui Li,Kang Sun,Changyu Leng,Jianchun Jiang
Reasonable structure design and component selection are crucial to electrochemical performance of supercapacitor electrode materials. Sodium alginate (SA), with a novel structure which can immobilize multivalent metal cations, was used to coordinate with Fe3+ to fabricate a carbon and Fe3O4 composite by an easy sol–gel method. Due to the chelation effect between SA and Fe3+, the carbon composite was constructed into a two-dimensional sheet-like structure, and the Fe3O4 particles were nanosize and homogenously distributed on the surface of the carbon nanosheet. As an electrode material for supercapacitors, the composite electrode showed a high specific capacitance of 550 F g−1 at 1 A g−1 in the potential range from −1.1 to 0 V, and excellent cycling stability of 89% retention after 2000 cycles. The enhanced electrochemical performance could be attributed to the abundant exposed active sites, producing high pseudocapacitance, to the two-dimensional nanosheet structure, facilitating electrolyte transport and to the strong attachment strength, improving cycle life. This environmentally-friendly design can provide an alternative to existing methods, resulting in the development of a two-dimensional carbon/metal oxide composite for energy storage devices.
研究领域:
材料科学
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电化学
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纳米科技
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能源存储
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功能材料
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高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2018
·
IF 4.514
Yuxin He,Qiuyu Chen,Song Yang,Chang Lu,Mengting Feng,Yuanli Jiang,Guoxi Cao,Jianping Zhang,Chuntai Liu
The epoxy nanocomposites with Fe 3 O 4 modified graphene oxide (Fe 3 O 4 /GO) were used to influence the micro-cracks resistance of carbon fiber reinforced epoxy (CF/EP) laminate at 77 K. Fe 3 O 4 /GO with good paramagnetic properties were prepared by co-precipitation method and used to modify epoxy for cryogenic applications. Fe 3 O 4 /GO modified CF/EP laminates were also prepared through vacuum-assisted resin transfer molding (VARTM). The results show that the Fe 3 O 4 /GO can effectively improve the mechanical properties of epoxy (EP) matrix at 77 K and reduce the coefficient of thermal expansion (CTE) of EP matrix. It also can obviously improve the micro-cracks resistance of CF/EP composites at 77 K. Compared to neat EP, the CTE of Fe 3 O 4 /GO modified EP composite is decreased 51.6%. Compared to CF/EP composite, the micro-cracks density of Fe 3 O 4 /GO modified CF/EP composite at 77 K is decreased 60.0%.
研究领域:
材料科学
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高分子复合材料
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低温工程
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纳米复合材料
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力学性能
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POLYMER BULLETIN
·
2016
·Vol. 74
·期 1
·75-90
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IF 1.371
Chen Xiuqiong,Yan Huiqiong,Shi Zaifeng,Feng Yuhong,Li Jiacheng,Lin Qiang,Wang Xianghui,Sun Wei
A novel biosensor based on electro-co-deposition of myoglobin (Mb), sodium alginate (SA), Fe 3 O 4 -graphene (Fe 3 O 4 -GR) composite on the carbon ionic liquid electrode (CILE) was fabricated using Nafion as the film forming material to improve the stability of protein immobilized on the electrode surface, and the modified electrode was abbreviated as Nafion/Mb-SA-Fe 3 O 4 -GR/CILE. FT-IR and UV–vis absorption spectra suggested that Mb could retain its native structure after being immobilized in the SA-Fe 3 O 4 -GR composite film. The electrochemical behavior of the modified electrode was studied by cyclic voltammetry, and a pair of symmetric redox peaks appeared in the cyclic voltammograms, indicating that direct electron transfer of Mb was realized on the modified electrode, which was ascribed to the good electrocatalytic capability of Fe 3 O 4 -GR composite, the good biocompatibility of SA and the synergistic effects of SA and Fe 3 O 4 -GR composite. The electrochemical parameters of the electron transfer number ( n ), the charge transfer coefficient ( α ) and the electron transfer rate constant ( k
s ) were calculated as 0.982, 0.357 and 0.234 s −1 , respectively. The modified electrode exhibited good electrocatalytic ability to the reduction of trichloroacetic acid (TCA) with wide linear range from 1.4 to 119.4 mmol/L, low detection limit as 0.174 mmol/L (3 σ ), good stability and reproducibility.
研究领域:
生物传感器
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电化学
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蛋白质电化学
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纳米材料
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生物相容性材料
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分子诊断
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转化医学
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高影响因子
Advanced Science
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2026
·
IF 14.1
Kailang Liu,Haocheng Ran,Haohui Ou,Peiying Chen,Cheng Qi,Tiantian Kong,Zhou Liu
Coacervate droplets formed via liquid–liquid phase separation offer unique opportunities as microreactors and delivery vehicles due to their ability to selectively concentrate biomolecules and support biochemical reactions. However, their passive nature severely restricts precise spatial and temporal control, posing barriers to practical implementation. Here, we report magneto-coacervate droplets constructed from gelatin, poly(diallyldimethylammonium chloride) (PDDA), and superparamagnetic Fe 3 O 4 @SiO 2 nanoparticles. These magneto-coacervate droplets exhibit reversible sol–gel transitions controlled by temperature and pH, tunable surface charge properties for electrostatically driven molecular enrichment, and precise three-dimensional manipulation under external magnetic fields. These magneto-coacervate droplets can serve as multifunctional platforms, greatly increasing the practical use of phase-separated microreactors in environmental remediation, biochemical processing, and targeted biomedical interventions. Demonstrated applications include efficient capture and recycling of microplastic pollutants, magnetically enhanced catalytic enzyme cascades with reaction rates 2–3 times higher than those of conventional methods, and targeted vascular embolization through controlled in situ gelation.
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PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Xuyang Qin,Wenqiang Xu,Ning Wang,Peng Chen,Huanyu Zhu,Mildred Quintana,Hongqiang Li,Shaoxian Song
A magnetic Zr-MOF@Fe 3 O 4 material for rapid phosphorus removal was developed. • A maximum phosphate uptake of 141.0 mg P g −1 was achieved. • Phosphate adsorption mainly involved ion exchange and inner-sphere coordination. • DFT calculation elucidated the orbital hybridization between Zr and O atoms. Environmental remediation of phosphorus-containing wastewater is crucial for ecological protection and sustainable resource development. However, existing adsorbents generally suffer from slow phosphate uptake kinetics, limited adsorption capacity and difficult solid-liquid separation. Here, a magnetic Fe 3 O 4 -modified zirconium-based metal–organic framework (Zr–MOF@Fe 3 O 4 ) was synthesized via a simplified hydrothermal process for highly selective phosphate adsorption. Outperforming most reported adsorbents, Zr–MOF@Fe 3 O 4 –1.0 with the porous framework and abundant active sites significantly enhanced phosphate adsorption kinetics, achieving an adsorption rate of 173.3 mg P g –1 h −1 within 0.5 h and a maximum adsorption capacity of 141.0 mg g −1 . Experimental results and density functional theory calculations indicated that the efficient phosphate capture was primarily attributed to synergistic effects of electrostatic adsorption, ion exchange with surface hydroxyl groups, and inner-sphere complexation via Zr–O–P bonds. Excellent anti-anion interference performance, coupled with robust cycling stability and rapid magnetic separation, collectively highlight the application potential of Zr–MOF@Fe 3 O 4 for phosphate removal from complex wastewaters. Download: Download high-res image (225KB) Download: Download full-size image
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JOURNAL OF MATERIALS SCIENCE
·
2026
·Vol. 61
·期 34
·25261-25270
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IF 4.4
Shi Wenwen,Wang Qikai,Cui Qiuhong,Yan Jun
The integration of photonic crystal (PC) architectures with magnetic responsiveness offers a compelling route toward smart micro-materials. However, achieving precise structural control over such composite microspheres via simple fabrication methods remains elusive. Here, we report a facile strategy combining simplified T-junction microfluidics with a concept of controlled HF etching to generate a series of hierarchically porous magnetic photonic crystal microspheres (MPhCMs) with tailored architectures. Crucially, by precisely regulating the etching extent, we achieve two functionally distinct yet structurally related outcomes. Complete etching transforms the spheres into hierarchically porous adsorbents exhibiting an adsorption rate of 92.33%, owing to the effect of etching-induced micropores. Conversely, partial etching yields symmetric Janus MPhCMs with an asymmetric fluorescent-magnetic barcode. These Janus microspheres demonstrate a magnetically driven fluorescence switching behavior, making them ideal candidates for advanced anti-counterfeiting. Thus, the same controllable etching strategy enables a seamless transition from high-performance absorbents to smart optical barcodes. This work presents a versatile platform for designing multifunctional microparticles, bridging the gap between structural engineering and high-performance applications in environmental remediation and optical security. Graphical
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Advanced Membranes
·
2026
·
IF 12.6
Mengjie Hou,Xinyu Dong,Yangshen Song,Ruisong Xu,Hui Li,Peng-Cheng Ma,Lin Li,Jieshan Qiu,Tonghua Wang
Energy-efficient gas separations necessitate the development of high-performance membrane materials. Carbon molecular sieve (CMS) membranes are regarded as highly promising candidates; however, it remains a challenge to precisely control the pore size and distribution of the membranes in order to achieve efficient molecular-level separations. Here, we report a distinct series of polymodal micro-mesoporous CMS membranes with excellent gas separation performance, which are engineered via a bulk-interface co-regulation strategy based on the incorporation of silane-functionalized iron oxide (Silane@Fe 3 O 4 ) nanoparticles and in situ pyrolysis. The Fe 3 O 4 nanoparticles grafted with organosilicon compounds exhibit good dispersibility and interfacial compatibility within the polymer matrix, enabling the synergistic regulation of the bulk-interface microstructure of derived hybrid CMS membranes during pyrolysis. By optimizing the fabrication conditions, such as filler loading level and pyrolysis temperature, a polymodal pore network, composed of concentrated mesopores (3-4 nm) and tight ultramicropores (<0.7 nm), is well-constructed, providing a shortened transport pathway and enhanced molecular-sieving capability. The resulting hybrid CMS membrane not only demonstrates high H 2 permeability of 7773 Barrer, but also exhibits attractive long-term separation performance with H 2 /N 2 selectivity of 241.4 during a continuous 720 h binary mixture feeding, which lies far above the latest upper bounds. This work provides a novel and simple strategy to synergistically regulate the polymodal porous structure of CMS membranes for efficient gas separation.
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Science Bulletin
·
2026
·
IF 20.7
Hong Huang,Xinyi Li,Xiaochun Xu,Xiaoyuan Sun,Jizheng Feng,Zhongfeng Wang,Mingming Wang,Shunlong Liu,Xiao Zhao
Nanoparticles (NPs) have been shown to enhance single-atom catalysis (SAC). However, current NPs are limited to single-phase and only display limited function and efficiency. Employing operando spectra, kinetic isotope effect, local pH measurement, and density functional theory calculations, we reveal that the core-shell Fe@Fe 3 O 4 NPs, as a whole, realize weakening *OH adsorption, promoting water dissociation, and tandem proton transfer. This enables Fe SAs -Fe@Fe 3 O 4-NPs to achieve an ORR half-wave potential ( E 1/2 ) of 0.952 V vs. reversible hydrogen electrode (V RHE ), outperforming commercial Pt/C ( E 1/2 = 0.844 V RHE ) and the Fe SAs -Fe NPs ( E 1/2 = 0.919 V RHE ). More importantly, the Fe 3 O 4 shell protecting the Fe core provides robust durability with negligible loss after 50,000 potential cycles between 0.6 and 1.0 V RHE , distinct from partial oxidation of Fe NPs under the oxygen reduction reaction conditions. At a device level, zinc-air batteries with Fe SAs -Fe@Fe 3 O 4-NPs as cathodic catalysts realize a peak power density of 250.2 mW cm −2 and stable operation > 10,000 charge-discharge cycles with RuO 2 at 10 mA cm −2 . This work implies a new room to enhance the SAC and offers comprehensive insights into understanding NPs in steering reaction kinetics. Download: Download high-res image (154KB) Download: Download full-size image
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PubMed
高影响因子
Journal of Environmental Sciences
·
2026
·
IF 6.5
Hongxin Liu,Kuiling Li,Lin Fang,Yang Yao,Zhigang Dan,Jun Wang
A heterogeneous electro-Fenton membrane distillation system is developed;. • Interfacial ·OH generation suppresses vapor-phase transfer of VOCs;. • High-salinity wastewater can be concentrated with controlled organic risk. High-salinity coal-chemical wastewater is challenging to manage because thermal concentration reduces wastewater volume but may simultaneously promote the carryover of volatile organics into the distillate and the enrichment of organics in the concentrating brine, thereby amplifying downstream risks. Here we develop a heterogeneous electro-Fenton membrane distillation (HEF-MD) process by integrating a Fe 3 O 4 -loaded membrane-based gas diffusion electrode (Fe 3 O 4 /Mem-GDE). This design couples oxygen delivery, in situ H 2 O 2 electro-generation, and surface-confined Fenton activation at the membrane-solution interface to establish an interfacial “reactive barrier”. Consequently, HEF-MD effectively suppresses vapor-phase transfer of representative volatile phenolics, achieving high rejection under conditions where conventional sweeping-gas MD exhibits low rejection or even enrichment of these compounds in the permeate. When applied to two real coal-chemical wastewaters, HEF-MD maintains stable vapor transport and high salt rejection while substantially improving distillate organic quality and mitigating organic build-up in the concentration brine, supporting a zero-liquid discharge operation. The system operates without chemical dosing or pH adjustment; when waste heat is available to drive MD, the incremental operating cost is dominated by electricity. Overall, these findings position HEF-MD as a practical, risk-controlled concentration strategy that couples desalination with in situ interfacial oxidation to suppress organic transfer, mitigate organic enrichment, and enable sustainable management of high-salinity industrial wastewaters. Download: Download high-res image (274KB) Download: Download full-size image
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Food Bioscience
·
2026
·
IF 6.2
Hua Jiang,Hezhe Guo,Jun Li,Yuanqi Dong,Shouhang Mi
Chlorogenic acid (CGA) is a naturally occurring phenolic compound with potent antioxidant and anti-inflammatory properties. It holds considerable promise for pharmaceutical development and functional food applications. However, the conventional extraction procedure for CGA is labor-intensive and necessitates substantial volumes of eluent. In this paper, thermosensitive magnetic molecularly imprinted polymers (TMMIPs) were synthesized by the surface imprinting method. To predict the optimal ratio of the template to the two functional monomers, computational studies and adsorption performance experiments were conducted. The structure of the prepared TMMIPs was characterized using SEM, IR, XRD, VSM, TGA, and DLS. The synthesized TMMIPs exhibit a high adsorption capacity (121.95 mg g −1 ), good selectivity and reusability for CGA. The adsorption process can be equilibrated in 25 min, magnetic separation in 10 s, and elution in 25 min. Therefore, it also features rapidity and high efficiency. The synthesized TMMIPs exhibited excellent selectivity and efficiency in enriching and quantifying CGA from Eucommia ulmoides leaves extracts. Recovery experiments conducted at three spiked concentration levels yielded recovery rates between 89.80% and 95.20%, with relative standard deviations ( RSD s) of less than 5%. TMMIPs offer a rapid, highly selective, and environmentally friendly strategy for isolating CGA from complex sample matrices.
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ANALYTICA CHIMICA ACTA
·
2026
·
IF 6.1
Qiaomei Lu,Le Huang,Haiyang Qiu,Yahui Shangguan,Wenmin Zhang,Yanjian Chen,Qinying Liu,Li Chen,Lan Zhang
Background Microporous organic network (MON) is a novel type of adsorbent and has wide applications in sample pretreatment. However, MON has a rigid plane and exhibits adsorption with most organic compounds, so they suffer from poor selectivity. The lack of selectivity hinders its practical application in complex matrices. Results This study focuses on enhancing the selectivity of MON by constructing a molecularly imprinted polymer (MIP) layer on its surface. A ganoderic acid molecularly imprinted magnetic microporous organic network composite (MMON@OA-MAA) was synthesized for the enrichment and separation of ganoderic acid (GD). The prepared MMON@OA-MAA material featured two key advantages: a high adsorption capacity (14.38-22.94 mg g −1 ) and excellent selectivity (α ≥ 1.5). The composite enabled hydrogen bonding, π-π interaction, and host-guest interactions with GD, which possessed active sites such as steroidal rings, hydroxyl groups, and carbonyl groups. An UPLC-MS/MS method was established and successfully applied to the efficient analysis of four trace GDs in complex Ganoderma samples, demonstrating a good linearity (r ≥ 0.9991), a low limit of detection (5.0 pg mL −1 ) and satisfactory recovery (81.0%-119.8%). Significance This research was a novel attempt to combine MIP with MMON to form MMON-MIP composite, achieving the synergistic enhancement of high selectivity and large adsorption capacity. The extraction process was simple and rapid, facilitating its broader application in the field of sample pretreatment, particularly for efficient analysis of trace bioactive components in complex natural matrices.
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危险品化学品经营许可证（带存储）