JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2014
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IF 2.063
Jixiang Wang,Jianming Pan,Yijie Yin,Runrun Wu,Xiaohui Dai,Jiangdong Dai,Lin Gao,Hongxiang Ou
Thermal-responsive and magnetic molecularly imprinted polymers (TMMIPs) based on Fe 3 O 4 @carbon (Fe 3 O 4 @C) were prepared by free radical polymerization and applied to selective adsorption and controlled release of 2,4,5-trichlorophenol (2,4,5-TCP) from aqueous solution. TMMIPs were composed of multilayer structure, and exhibited magnetic sensitivity, magnetic stability and thermal stability (especially below the. The reversible transform of mean diameter resulted from the change of testing temperature, indicating the thermo-responsive properties of TMMIPs. Selective adsorption and controlled release of 2,4,5-TCP were also investigated at 25 °C and higher temperature (such as 45 °C and 60 °C), respectively.
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高影响因子
CATALYSIS LETTERS
·
2019
·Vol. 149
·期 4
·1111-1117
·
IF 2.372
Yang Yong,Guan Dongdong,Liu Yu,Chen Shuang,Meng Wan,Jiang Nanzhe
Baeyer–Villiger oxidation allows for effective control of the stereochemical structure of the product, which is a significant feature for functional group conversion and ring expansion in organic synthesis. In this study, Fe 3 O 4 nanoparticles were loaded on acid-washed porous illite silicon slag (I-SR) using an in situ hydrothermal method to obtain the magnetic composite Fe 3 O 4 @I-SR. This composite was characterized by X-ray diffraction, transmission electron microscopy, scanning electron microscopy, N 2 adsorption–desorption isotherm measurements, vibrating sample magnetometer analysis, etc. The results indicated that the Fe 3 O 4 nanoparticles had a face-centered cubic lattice geometry with an average size of about 10 nm; the nanoparticles were uniformly dispersed on the surface of the carrier (I-SR) and exhibited strong paramagnetism. Fe 3 O 4 @I-SR composite was found to be a promising and efficient catalyst with high activity (> 99% cyclohexanone conversion and > 99% ε-caprolactone selectivity) for the Baeyer–Villiger of cyclohexanone to ε-caprolactone. The catalyst could be easily separated from the reaction mixture and reused many times. Thus, Fe 3 O 4 @I-SR is an attractive multiphase catalyst that is easy to handle and recycle under environmentally friendly reaction conditions. Graphical
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Youyu Li,Min Zou
Owing to its low grade and complex dissemination, the efficient recovery of vanadium from stone coal vanadium ore remains highly challenging. To address this issue, this study proposes a novel approach, referred to as "narrow particle-fraction wüstite (Fe 1- x O) solid solution magnetization," which enables highly efficient vanadium enrichment from stone coal vanadium ore through the use of precisely controlled narrow particle-fraction Fe 1- x O. During roasting under a reducing atmosphere, vanadium-bearing components are thermally activated and diffuse into the Fe–O lattice of residual granular Fe 1- x O through the product layer, resulting in the formation of a ferrimagnetic Fe 3 O 4 –FeV 2 O 4 (Fe 3- x V x O 4 ) solid solution. Subsequently, the Fe 3- x V x O 4 phase is separated using low-intensity magnetic separation. Taken the stone coal vanadium ore with a V 2 O 5 content of 0.95 wt% as the raw material, under optimized Fe 1- x O particle size fractions and roasting parameters, the magnetic separation process yielded over 87% vanadium recovery in the concentrate, with a V 2 O 5 grade exceeding ten times that of the raw tailings, the processing volume required for the subsequent hydrometallurgical vanadium extraction process reduced by nearly 90%. Mechanistic analyses (SEM–EDS, EPMA, VSM, CLSM, and XRD) confirmed that the in situ-formed Fe 3- x V x O 4 solid solution served as an efficient magnetic carrier for vanadium in stone coal vanadium ore. Therefore, this approach provides a sustainable pathway for the efficient conversion of stone coal vanadium ore.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Yi Li,Yong Tang,Yujing Wang,Junyin Chen,Chun Huang,Jianwei Zhao,Lirong Qin
Aqueous zinc‑ion batteries (AZIBs) are promising for safe and low‑cost energy storage, yet their practical application is hindered by limited cathode cyclability and poor low‑temperature performance. Herein, a ternary composite of V 3 O 4 /Fe 3 O 4 /V 1.5 Fe(CN) 6 nanorods is directly grown on carbon cloth via a simple hydrothermal method. The electrode exhibits a unique activation behavior: its specific capacity gradually increases by more than 300% during the initial galvanostatic charge‑discharge cycles, reaching 530.1 mAh/g at 1 A/g. Ex situ XRD and XPS reveal that activation induces lattice expansion and an increase in V 4 + and Fe 3+ contents without phase transformation. The VF‑20 electrode delivers exceptional long‑term stability (89% retention after 4200 cycles at 4 A/g) and remarkable low‑temperature performance (69 mAh/g at −40 °C and 0.1 A/g). This work provides a new paradigm of activation‑driven performance enhancement for multiphase cathodes in AZIBs.
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FOOD RESEARCH INTERNATIONAL
·
2026
·
IF 8.8
Mengxia Duan,Wenxiu Zheng,Zepeng Gu,Man Ding,Shiping Luo,Zhouping Wang,Shijia Wu,Yukun Huang,Nuo Duan
Colorimetric/electrochemical sensor was established for S. typhimurium detection. • A specific aptamer for capturing S. typhimurium has enhanced detection accuracy. • Fe 3 O 4 @PdIr showed enhanced POD-like activity and electrochemical performance. • ANN model achieved dual signal fusion and output a single detection result. • The sensor showed low LOD value of 1.66 CFU/mL assisted by ANN data fusion. Salmonella Typhimurium ( S. typhimurium ) is a major foodborne pathogen that poses a serious threat to public health. In this study, a colorimetric/electrochemical dual-mode biosensor assisted by artificial neural network (ANN) was developed for the sensitive detection of S. typhimurium . Fe 3 O 4 @PdIr nanocomposites with enhanced peroxidase-like activity and electrochemical performance were prepared and conjugated with an aptamer specific to S. typhimurium to obtain Fe 3 O 4 @PdIr-Apt. Through the sandwich binding of Fe 3 O 4 @PdIr-Apt and Apt to the target, the nanocomposites were attached to microplates or Au electrodes, thereby generating colorimetric and electrochemical signals. The ANN model deeply resolved the complex nonlinear relationship between the dual signals, enabling mutual correction and ultimately performing data fusion to output a single detection result, which significantly reduced the mean square error while improving detection sensitivity and reliability. This sensor exhibited a wide linear range of 2.7–2.7 × 10 8 CFU/mL and a low detection limit of 1.66 CFU/mL. Additionally, this method was successfully applied to the detection of S. typhimurium in pork and milk, with a recovery rate of 95.19% ~ 104.07%. It indicated that the constructed sensor holds great practical potential for S. typhimurium detection. Download: Download high-res image (117KB) Download: Download full-size image
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Colloids and Interfaces
·
2026
·Vol. 10
·期 4
·54
·
IF 3.8
Xinxiu Cao,Jiateng Chen,Xiaowei Kang,Yanjun Li,Minzhen Bao,Yu Wang
With the pervasive deployment of 5G communication systems and electronic devices, electromagnetic (EM) pollution has emerged as a critical environmental concern. Due to their wide availability, low cost, and ease of acquisition, biomass materials have been widely used in the preparation of electromagnetic wave absorption materials. Compared with traditional in situ impregnation methods, this study first employs chemical reagents to reduce the lignin content within balsa wood, thereby opening more pores and enhancing the loading capacity of iron salts. Subsequently, magnetic Fe3O4particles are synthesized in situ, enabling the fabrication of magnetic wood-based composites. Compared with the non-impregnated pure carbonized samples, the reflection loss value of the samples with magnetic particles increased to −42.37 dB, corresponding to a matching thickness of 1.5 mm. This is much better than the −8.79 dB of the pure carbonized samples, and is attributed to multiple loss mechanisms. In addition, modern physical and chemical analysis instruments such as SEM, TEM, XRD, XPS, and Raman were used to characterize the physical and chemical changes of the materials. Finally, its applications in aerospace and thermal response were identified.
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WATER AIR AND SOIL POLLUTION
·
2026
·Vol. 237
·期 17
·1000
·
IF 3.5
Yan Shiying,Zhang Jian,Liu Yimeng,Chen Yiping,Jiang Tianlan,Gao Yu,Zhang Jie,Gao Jingqi,Li Fosheng,Zhao Jian,Feng Su
This study presents a composite biosorbent, Nano-Fe—SA—XB, synthesized by immobilizing a consortium of Shewanella putrefaciens and Serratia sp. B16 (XB) within a sodium alginate (SA) matrix reinforced with Nano-Fe 3 O 4 (Nano-Fe). A preliminary orthogonal formulation screening identified 4% Nano-Fe, 4% SA, 30 g/L XB biomass, and 4 h crosslinking as the selected preparation condition. At pH 7, using a wet dosage of 0.6 g (equivalent to a calculated dry mass of ~ 0.03 g), Nano-Fe—SA—XB achieved an 80.51% removal efficiency at a 20 mg/L initial Cd(II) concentration. Normalized to dry weight, the experimental maximum adsorption capacity was 72.5 mg/g at 150 mg/L, while the Langmuir-estimated capacity reached 87.8 mg/g. Kinetic and isotherm fitting suggested that Cd(II) uptake was consistent with pseudo-second-order kinetics and Sips/Langmuir-type adsorption behavior. SEM–EDS and FTIR analyses suggested that Cd(II) removal was associated with surface complexation and ion-exchange interactions involving hydroxyl, amide/carboxyl, phosphate, and calcium-containing sites. XRD showed no detectable new crystalline Cd-containing precipitates after adsorption. The material also showed NaCl-regeneration potential and 30-day Cd(II) retention/release stability. Overall, Nano-Fe—SA—XB shows potential as a reusable biosorbent for Cd(II)-contaminated water, while further mechanical, thermodynamic, surface-charge, pore-structure, magnetic, and chemical-state characterization is still needed. Graphical
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LWT-FOOD SCIENCE AND TECHNOLOGY
·
2026
·
IF 7.1
Guohua Teng,Min Zhou,Initizar Anwar,Yang Liu,Fuyi Li,Yanxu Chang,Yidan Wang,Yuefei Wang,Fei Tian
Flavonoids in Scutellaria Radix ( SR ) exhibit significant pharmacological activities, yet conventional extraction methods often suffer from low efficiency and poor selectivity. Here, a green and effective strategy was developed using deep eutectic solvent (DES)-functionalized magnetic nanoparticles for selective flavonoid enrichment. Forty-eight DESs were screened, and levulinic acid/L-proline (2:1) was identified as the optimal system. The selected DES was employed to synthesize Fe 3 O 4 @SiO 2 @DES, which demonstrated high specificity and adsorption performance in magnetic solid-phase extraction. Under optimized conditions, adsorption efficiencies for four representative flavonoids ranged from 0.770 ± 0.01 to 0.983 ± 0.002, with desorption recoveries of 0.551 ± 0.003 to 0.919 ± 0.019. The method showed excellent linearity (R 2 ≥ 0.9998) and low limits of detection and quantification (0.01-0.35 μg mL −1 and 0.03-0.98 μg mL −1 , respectively). Moreover, the adsorbent retained high adsorption efficiency after six reuse cycles, demonstrating stability and reusability. This work provides a sustainable and selective approach for flavonoid enrichment from SR and highlights the potential of DES-functionalized magnetic nanomaterials as an eco-friendly alternative to conventional organic solvent-based extraction.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Xueyue Lyu,Qiu Zhang,Liying Pan,Chenyang Zhang,Xinrui Wang,Jiawei Qi,Guangdong Zhao,Dongyu Zhao
With a rapid advancement of electronic information technology, electromagnetic waves have facilitated information transmission, however, they have also increasingly caused severe electromagnetic interference affecting a normal operation of electronic devices. Consequently, the development of materials exhibiting high-efficiency electromagnetic wave absorption properties to mitigate electromagnetic pollution holds substantial scientific and practical significance. In this study, click chemistry was innovatively employed in the interfacial bonding of composite aerogels. Conductive MXene nanosheets were embedded within the three-dimensional network framework of bacterial cellulose (BC), and then the Fe 3 O 4 nanoparticles were attached to the surface of the substrate through a thiol-ene click chemical reaction, successfully constructing a BC/MXene/Fe 3 O 4 (BMF) composite aerogels with a multi-scale porous structure. The aerogel demonstrates a dual-loss mechanism, combining electrical loss and magnetic losses synergistically, thereby effectively addressing the issue of impedance mismatch. Additionally, its hierarchical pore structure significantly enhances multiple reflections and scattering of electromagnetic waves within the material, extending the propagation path and consequently improving energy dissipation capacity. The results show that the BMF composite aerogels exhibits excellent electromagnetic wave absorption properties. Its minimum reflection loss is −52.80 dB, the maximum effective absorption bandwidth is 5.98 GHz (11.91–17.89 GHz), and the absorption efficiency is 99.999 %, capable of covering most of the Ku band (2–18 GHz). Furthermore, the aerogel possesses lightweight characteristics (density of 0.0150 g/cm 3 ) and favorable thermal insulation properties (thermal conductivity of 0.0293 W·m −1 ·K −1 ). The development of BMF composite aerogels offers a novel approach for electromagnetic shielding materials applicable to the protection of precision electronic equipment and the defense industry applications.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2026
·
IF 8.7
Fangjun Wu,Juan Sun,Zheng Nie,Fujie Lai,Xudong Yang,Shaoyang Chen,Yang Wang
In the context of the ongoing normalisation of the SARS-CoV-2, the number of patients infected with the new coronavirus remains high on an annual basis. It is therefore imperative that individuals have access to rapid and cost-effective diagnostic tests. Conventional diagnostic tests,such as Reverse Transcription-Quantitative Polymerase Chain Reaction(RT-QPCR), Enzyme-Linked Immunosorbent Assay(ELISA) are costly and cumbersome, impeding their application in single-sample detection. This study has developed a cost-effective lateral flow immunoassay that rivals the sensitivity and simplicity of ELISA and colloidal gold tests, facilitating rapid and affordable detection of SARS-CoV-2 antigen. The synthesis of Fe 3 O 4 particles with a diameter of approximately 150 nm was initially conducted via a solvothermal method. Subsequently, the preparation of Fe 3 O 4 @PMAA particles with carboxyl groups, was undertaken through a reflux precipitation polymerization. Finally, the above particles were coupled with mouse anti-coronavirus SARS-CoV-2 N protein IgG by standard NHS/EDC methods to obtain Fe 3 O 4 @PMAA@IgG nanoprobe. This nanoprobe was then used as an immunoconjugate pad for the detection of the SARS-CoV-2 nucleoprotein. The nanoprobe-based method demonstrated significant advantages in cost-effectiveness and timeliness (with an assay duration of only 1 min), costing approximately $0.13 per sample. When used for SARS-CoV-2 antigen detection, this cost represents only 0.02% of that of RT-QPCR and 0.05% of that of ELISA.The detection limit of the lateral flow immunoassay is (0. 5 ng/mL).
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PubMed
高影响因子
LANGMUIR
·
2026
·
IF 4.4
Yun Zhang,Wei Wei,Yiwen Guo,Jinyu Chai,Lu Liu,Jinhua Zhu
The conventional synthesis of superparamagnetic Fe3O4 superparamagnetic nanoparticles (Fe3O4SNPs) for biomedical applications often suffers from poor aqueous dispersibility, complex multistep processes, and potential toxicity from organic solvents or surfactants. Achieving precise control over both particle size and magnetic field-driven aggregation state in a biocompatible manner remains a significant challenge. A facile one-pot hydrothermal synthesis strategy was developed using a polysaccharide-iron complex as the precursor to prepare nano-Fe3O4 with excellent water dispersibility. With this method, we achieved precise regulation of Fe3O4 particle size (3.2–12.5 nm) and magnetic field-driven aggregation behavior by optimizing reaction conditions (such as sugar content, NaOH concentration, and reaction time), making them suitable for different biomedical scenarios such as the separation of active ingredients, in vivo targeted delivery, or MRI contrast agent. The solution of synthesized Fe3O4SNPs remained stable at room temperature for up to six months without any precipitation and did not exhibit significant toxicity at different particle sizes. In vitro MRI performance evaluation revealed that Fe3O4SNPs with a particle size of 8.1 nm exhibited a high transverse relaxation rate (r2 = 189.8 mM–1 s–1) and a prominent r2/r1 ratio of 172.5, demonstrating potential as a T2 contrast agent; nanoparticles with a particle size of 4.0 nm displayed an r1 value approximately 1.6 times that of Gd-DTPA contrast agents, showing application potential as T1 contrast agents. This green synthesis method only uses water and polysaccharide iron complexes, thus providing a technical reference for the production of medical magnetic nanomaterials.
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PubMed
高影响因子
Surfaces and Interfaces
·
2026
·
IF 6
Hui Zhou,Bingxin Zhu,Xiang Li,Baolei Liu,Zhigang Liu,Shihua Yu
To recover the high value-added pharmaceutical intermediate tenofovir from wastewater efficiently and conveniently, a tailored magnetic composites of Fe 3 O 4 @SiO 2 @La(OH) 3 have been prepared via solvothermal and in-situ reduction methods. It exhibits the ability to remove tenofovir with high efficiency and easily separated from matrix. Batch sorption experiments demonstrated that Fe 3 O 4 @SiO 2 @La(OH) 3 can remove tenofovir with the maximum adsorption capacity of 64.53 mg/g, the largest removal of 93.07%, and fast equilibrium time of 5 min. The kinetics of tenofovir adsorption on the magnetic composite is in line with the pseudo-second-order model, while the isotherm is fitted well by the Langmuir model, and thermodynamic parameters represent that adsorption process is spontaneous and endothermic. Moreover, the saturated Fe 3 O 4 @SiO 2 @La(OH) 3 have been desorbed by mechanical stirring with the high desorption rate of 93.02%, and the adsorption capacity maintaining 47.72 mg/g after five cycles. Importantly, the composites can be used for tenofovir removal from crude extracts of pharmaceutical wastewater, with an adsorption capacity of 51.61mg/g in 5 min. Finally, the adsorption mechanisms are explored by pH experimental evidence and XPS analysis, which show that mainly involve electrostatic attraction and the inner-sphere complexation between La(OH) 3 and phosphate groups of tenofovir via ligand exchange. All the results prove that the proposed tenofovir recovery technique, providing new ideas for the recovery of high value-added substances and waste resources rationalization of the application of development. A magnetic Fe 3 O 4 @SiO 2 @La(OH) 3 was synthesized and realized the recovery of tenofovir with high economic value in pharmaceutical wastewater crude extracts. Download: Download high-res image (249KB) Download: Download full-size image
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