Water
·
2025
·Vol. 17
·期 9
·1342
·
IF 3
Xinyi Zhang,Tian Xia,Ying Meng,Jiaxi Zhang,Gaofeng Chen,Zhaoting Ji,Wenli Qin
Microcystins (MCs) are produced by cyanobacteria blooms in eutrophic water and can cause acute and chronic toxicity and even mortality to animals and humans. Previous MC removal strategies concernedonly highly contaminated water, in which the concentration of the pollutant was considerably larger than that in the natural world. In this study, we developed a composite of TiO2-coated magnetic carbon microtube (C-TiO2-Fe3O4) and used it as a photocatalyst to efficiently remove microcystin-LR (MC-LR) from water under visible light from water. And the huge surface of the carbon microtube dramatically boosted the adsorbability and charge mobility, which lowered the recombination rate of electron–hole pairs, and hence systematically enhanced photocatalytic activity. The combination of adsorption and photodegradation endowed the composite with a better performance in the removal of trace amounts of MC-LR than the C-TiO2. It was found that increasing the contact time and catalyst dosage, acidic environment, and lower initial MC-LR concentration had positive effects on MC-LR removal. The optimum reaction conditions of C-TiO2-Fe3O4was a reaction time of 12.68 min, a catalyst dosage of 0.39 g·L−1, and a pH of 7.72. The C-TiO2-Fe3O4(surface area normalized apparent reaction rate constantsK/SBET= 1.2 × 10−4) presented a higher reaction rate than C-TiO2(K/SBET= 8.4 × 10−5). Moreover, the stable removal capability of C-TiO2-Fe3O4was confirmed over multiple cycles. Finally, the ecological safety performance was also evaluated after visible light illumination. This work paves the way for the development of more efficient and easily separable purifiers for the removal of pollutants and toxins from contaminated water.
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产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Yu Tian,Binghua Chang,Ziliang Zong,Jing Wang,Xiaojing Lu,Yonglin Li,Qi Zheng,Rongwei Wei,Yan Shen,Yigang Chen
Obesity has become a major public health and social concern due to economic development and rising living standards. Currently, obesity treatment modalities often associated with various side effects. Probiotics have significant effects in mitigating obesity and reducing lipid levels. As a gentle anti-obesity approach, oral probiotics hold promise, yet they are vulnerable to inactivation in the harsh gastrointestinal environment. To address this challenge, this study developed an innovative binary system of armored probiotics (LPIC) that integrates microbiotherapy and chemotherapy. Iron oxide nanoparticles (IONPs) were applied using a single-bacterium encapsulation technique to create a protective armor on the surface of Lactobacillus plantarum (LP). This process produced armored probiotics (LPI) that effectively shield the bacteria from degradation by gastric acid. To complete the system, guanidine grafted chitosan oligosaccharides polymers (CHG) was added to LPI to form LPIC, enabling the chemotherapy component for obesity treatment. The LPIC system offers dual benefits: the IONP armor significantly improves bacterial survival in simulated gastric fluid (up to 58.02 %), while CHG facilitates rapid absorption and exerts therapeutic effects in the gastrointestinal tract. In vivo, LPIC administration led to a reduction in adipose tissue weight to 0.59 and 0.73 times that of high-fat diet (HFD) and LPI-treated mice, respectively. This suggests that IONPs not only promote fat reduction but also enable the gradual release and absorption of LP in the intestine, allowing effective colonization and sustained anti-obesity benefits.
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DOI
PubMed
高影响因子
Journal of Macromolecular Science Part A-Pure and Applied Chemistry
·
2025
·
IF 2.4
Shenghua Xu,Weihong Guo
A novel magnetic nanocomposite was successfully synthesized by grafting Poly(L-glutamic acid) (PLGA) onto Fe3O4 nanoparticles, achieved through the carboxylation of a Fe3O4-graft-poly(γ-benzyl-L-glutamate) (Fe3O4-g-PBLG) precursor with trimethyliodosilane. The chemical structure of the resulting Fe3O4-graft-Poly(L-glutamic acid) (Fe3O4-g-PLGA) was unequivocally confirmed by 1H NMR and FT-IR spectroscopy. This composite exhibited superparamagnetic behavior (saturation magnetization: 6.73 emu/g) and enhanced hydrophilicity (contact angle: 36.6°). Porous scaffolds were fabricated via a well-established solution casting and particulate leaching technique using NaCl as a porogen. By precisely controlling the porogen amount (10 g and 15 g per gram of composite), scaffolds with tailorable macroporous architecture were obtained, featuring pore sizes of 250 ± 30.98 μm and 450 ± 39.72 µm, and interconnected porosities of 90.2 ± 2.95% and 96.9 ± 3.67%, respectively. A comprehensive evaluation of the scaffolds’ physical properties revealed high water retention capacities (1179 ± 73.26% and 1051 ± 69.35%), tunable compressive moduli (0.35 ± 0.05 MPa and 0.21 ± 0.02 MPa), and viscoelastic storage moduli ranging from 5500 to 6500 Pa. In vitro degradation studies in PBS over 20 wk demonstrated controllable biodegradation, with mass losses of 58.22 ± 2.36% and 68.69 ± 2.77%, correlating with the scaffold porosity. Finally, preliminary cytocompatibility assessment using adipose-derived stem cells indicated favorable cell adhesion on the scaffold surface, as observed by SEM and LCSM. The tailorable porosity, robust mechanical properties, and superparamagnetic nature of the Fe3O4-g-PLGA scaffolds render them a versatile functional material with broad potential in the field of polymeric biomaterials. However, its comprehensive biological evaluation, including direct cytotoxicity tests and in vivo performance assessment, is an important direction for future research.
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DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2023
·Vol. 30
·期 12
·1-14
·
IF 2.8
Du Yonggang,Zhu Yongfei,Li Yuxuan,Xiao Jianrui,Wang Zhi
To develop a durable superhydrophobic cotton fabric (CF) for effectively separating oil/water mixtures, a pyrogallol-based polybenzoxazine with abundant hydroxyl groups (PPG-D) and Fe 3 O 4 were adopted to decorate CF. Meanwhile, a commercial benzoxazine based on bisphenol A and aniline (BA-a) was also incorporated to enhance the application potential of superhydrophobic CF. As expected, a durable superhydrophobic cotton fabric (PPG-D@PBA-a@Fe 3 O 4 @CF) with a water contact angle (WCA) of 154° was successfully fabricated via a facile dip-coating method. PPG-D@PBA-a@Fe 3 O 4 @CF not only could effectively separate immiscible oil–water mixtures with a high permeation flux of up to 12207 L/m 2 h and separation efficiency of above 98.8%, but also displayed a satisfactory separation ability for surfactant-stabilized water-in-oil emulsions with a separation efficiency of over 99.8% and high flux in the range of 4971–8281 L/m 2 h, and the modified CF remained a superior separation efficiency and flux even after 20 separation cycles. In addition, PPG-D@PBA-a@Fe 3 O 4 @CF also displayed outstanding mechanical and chemical stability as well as excellent self-cleaning ability, and the WCA of modified CF could reach 148° even after 100 abrasion cycles. These excellent characteristics make PPG-D@PBA-a@Fe 3 O 4 @CF have a promising application in oil–water separation.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Li Guo,Kai Lai Zhang,Huidong Shen,Chan Wang,Qiang Zhao,Danjun Wang,Feng Fu,Yucang Liang
Exploiting highly efficient and stable photocatalysts for treating Cr(VI)-containing wastewater is of great importance. Herein, a robust core-shell structurally magnetic Fe 3 O 4 @SiO 2 /Bi 2 WO 6−x F 2x photocatalyst was successfully fabricated and used to photocatalytic Cr(VI) reduction, in which an inert protective layer (SiO 2 )-coated micro/nanostructured Fe 3 O 4 particles can not only improve the chemical stability but also retain magnetic advantage of catalyst. The optimized 55% Fe 3 O 4 @SiO 2 /Bi 2 WO 6− x F 2 x exhibited the highest catalytic activity in a reaction system of pH = 3, the apparent rate constant (k app /min −1 ) of 55% Fe 3 O 4 @SiO 2 /Bi 2 WO 6−x F 2x for photocatalytic reduction of Cr(VI), as high as 0.027 min −1 , is approximately 5.4 and 2.6 times higher than that of Bi 2 WO 6 and Fe 3 O 4 @SiO 2 /Bi 2 WO 6 , respectively. After being illuminated for 90 min, nearly 100% percentage of Cr(VI) has been reduced to Cr(III) by using 55% Fe 3 O 4 @SiO 2 /Bi 2 WO 6−x F 2x as photocatalyst, which can be attributed to the synergistic effect of magnetic Fe 3 O 4 @SiO 2 support – “core”, Bi 2 WO 6 – “shell” and the successful introduction of F − ions. A readily magnetic separation of Fe 3 O 4 @SiO 2 /Bi 2 WO 6−x F 2x catalyst enabled it to reuse conveniently for practical industry application. Finally, the enhanced photocatalytic mechanism of catalyst was proposed for Cr(VI) reduction. The present study not only provides a new mean to solve the recovery of the Bi 2 WO 6 -based photocatalyst, but also presents a promising candidate for Cr(VI) reduction in the field of the industrial wastewater treatment.
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高影响因子
POLYMER COMPOSITES
·
2021
·Vol. 42
·期 12
·6816-6826
·
IF 3.171
Changhong Lin,Puyou Ying,Min Huang,Ping Zhang,Tao Yang,Gang Liu,Jianbo Wu,Vladimir Levchenko
The permanently chemically cross-linking solid–solid phase change materials (SSPCMs) were designed to solve the problem of leakage and poor shape stability during the whole process of phase transformation. However, these materials lead to environment pollution and resources waste because of the non-recyclability. Therefore, a SSPCMs was fabricated using dynamic thermal reversible Diels–Alder bonds. The prepared SSPCMs exhibited excellent shape, heat storage stability, and reliability and reprocessed ability, resulting from dynamic Diels–Alder bonds. Moreover, the Halloysite nanotubes decorated with Fe 3 O 4 nanoparticles (HNTs@Fe 3 O 4 ) were used to enhance the thermal conductivity of SSPCMs. When the filler content was 0.5 wt%, the best integrated properties (phase change properties and thermal conductivity) of the SSPCMs were obtained, it had the highest melting and freezing phase change enthalpies about 116.8 and 127.2 J/g, and thermal conductivity value, 0.223 W/m K, which was 101% higher than pure SSPCMs. Hence, the prepared SSPCMs can be considered as promising save-energy, friendly-environment thermal management materials.
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DOI
高影响因子
Surfaces and Interfaces
·
2022
·
IF 6.137
Jinhao Gao,Wenqiang Chen,Huaqiang Shi,Zhijian Li,Liming Jing,Chen Hou,Jianzhi Wang,Yang Wang
Co 3 O 4 @Fe 3 O 4 /cellulose membrane was synthesized by coating rod-like MOF-derived Fe 3 O 4 with Co 3 O 4 nanoparticles and blending with cellulose solution, further applied in the visible light-driven photo-Fenton system for perfluorooctanoic acid (PFOA) degradation. In the H 2 O 2 /membrane/visible light system, the Electron paramagnetic resonance (EPR) analysis and scavenger experiment results suggested that PFOA degradation was a co-dependent mechanism via photogenerated electrons, photogenerated holes ( h + ) and various radical species, rather than a single active constituent. Co 3 O 4 @Fe 3 O 4 /cellulose membrane showed outstanding degradation performance, stability and recyclability under optimal conditions. Compared with pure Fe 3 O 4 or Co 3 O 4 nanoparticles , the Co 3 O 4 @Fe 3 O 4 /cellulose membrane can degrade around 94.5% PFOA within 180 min in reaction system, and the leached Fe and Co was only 0.05 and 0.49 ppm, respectively. Moreover, Co 3 O 4 @Fe 3 O 4 /cellulose was reused by rinsing with ultra-pure water and the degradation capacity was still 80.4% after five cycles. The degradation pathway of PFOA also was proposed based on UHPLC-MS analysis.
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DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2018
·
IF 5.08
Tingting Lu,Yan Wu,Chili Zhao,Fu Su,Jine Liu,Zhenye Ma,Qiaorong Han
In this study, Fe 3 O 4 /hyperbranched polyester-(2-dodecen-1-yl)succinic anhydride2-Dodecen-1-/isoniazid magnetic nanoparticles (Fe 3 O 4 /HBPE-DDSA/INH MNPs) with controlled drug release characteristics were synthesized successfully by a simple one-step method. Orthogonal experiments were performed to optimize the loading capacity and encapsulation efficiency of the MNPs. The structure of the Fe 3 O 4 /HBPE-DDSA/INH MNPs was characterized by 1 H nuclear magnetic resonance spectroscopy, matrix-assisted laser desorption/ionization mass spectrometry, Fourier transform infrared spectroscopy, X-ray diffraction analysis, transmission electron microscopy, and superconducting quantum interference device measurements, while their properties were characterized based on swelling behavior observations, in-vitro release experiments, and cytotoxicity analysis. The results indicated that the fabricated Fe 3 O 4 /HBPE-DDSA/INH MNPs had a high drug-loading capacity and encapsulation efficiency. Further, the drug-release rate of the MNPs was higher in an acidic buffer, indicating that the MNPs were pH-responsive. Swelling studies revealed that the MNPs exhibited diffusion-controlled drug release, while in-vitro release studies revealed that the drug-release properties could be controlled readily, owing to the high encapsulation efficiency of the MNPs and the uniform dispersion of the drug in them. These results collectively suggest that this multifunctional nontoxic drug delivery system, which exhibits good magnetic properties and pH-triggered drug-release characteristics, should be suitable for the treatment of tuberculosis.
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DOI
高影响因子
TALANTA
·
2023
·
IF 6.1
Shuang Li,Yu Zhang,Mengdi Guo,Zhibin Yi,Mengna Hu,Chunhong Xiong,Ganhui Huang,Jinsheng Zhang
Electrochemical sensors show distinct advantages over other types of sensors in the rapid detection of microorganisms. Here, we attempted to construct a label-free electrochemical immunosensor based on an Fe 3 O 4 –ionic liquid (IL)-modified electrode to rapidly detect Salmonella in milk. The excellent ionic conductivity of the IL facilitated sensor construction, and the large surface area of nano-Fe 3 O 4 provided numerous sites for subsequent experiments. An antibody was fixed on the Fe 3 O 4 –IL complex with polyglutamic acid modification by a simple infusion method. The microstructure of the Fe 3 O 4 –IL composites was investigated by scanning electron microscopy, and the elements and structures of the composites were analyzed by energy dispersive X-ray and Fourier transform infrared spectroscopy. Under optimized experimental conditions, the detection range of the constructed sensor was 3.65 × 10 2 –3.65 × 10 8 CFU mL −1 , and the LOD was 1.12 × 10 2 CFU mL −1 (S/N = 3). In addition, the prepared electrochemical immunosensor is convenient for detecting foodborne pathogens because of its outstanding stability, good selectivity, and repeatability.
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DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2020
·
IF 3.807
Haifeng Xu,Guang Zhu,Zhong Jin
Reasonably designing of counter electrode (CE) and iodine ion electrolyte is crucial for enhancing the power conversion efficiency (PCE) of dye-sensitized solar cells (DSSCs). Fe 3 O 4 possesses high conductivity and catalytic activity to facilitate the electrolyte reduction reaction at the surface of CE. However, the morphology control and active site modulation of Fe 3 O 4 based CE are still to be explored. Herein, we propose a facile bottom-top strategy to prepare hierarchical Fe 3 O 4 nanostructures with different tunable morphologies, including Fe 3 O 4 nanorings (NR), nanosheets (NS) and nanoflowers (NF). Electrochemical impedance spectroscopy , Tafel polarization, cyclic voltammetry and photocurrent density-voltage measurements of these samples were carried out, revealing their high performances as CE in DSSCs. Among them, the Fe 3 O 4 NF with mesoporous nanosphere flower structure and high specific surface area is synthesized, which realized the highest PCE (8.56%), which is also higher than the value of Pt based CE (7.57%). Compared to other competing materials, Fe 3 O 4 nanostructure based CE shows the outstanding merits of high photovoltaic performance , easy preparation, low cost and eco-friendliness, offering the possibility to replace conventional Pt based CE in DSSCs.
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DOI
高影响因子
KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2018
·Vol. 35
·期 9
·1836-1843
·
IF 2.199
Ren Suyu,Tao Jing,Cui Ying,Gao Jinsuo,Li Xiaona,Tan Feng
Bisphenol A (BPA), a known endocrine disruptor, is of global concern because it poses serious threats to the ecological environment and human health. In this work, hydrophilic polydopamine-coated Fe 3 O 4 /oxide graphene (IPDA@MGO) magnetic imprinted nanocomposites were prepared by the self-polymerization of dopamine on the surface of Fe 3 O 4 /GO in Tris-HCl buffer using BPA as a template for selective adsorption of BPA in water. IPDA@MGO showed specific recognition toward BPA with a high imprinting factor of 3.2 compared with nonimprinted polymer. The capacity of IPDA@MGO toward BPA was 41.2 mg/g and the adsorption reached equilibrium within 30 min. The adsorption agreed well with the Freundlich and pseudo-second order kinetic models. The good adsorption performance was attributed to the abundant binding sites and good dispersibility of IPDA@MGO nanocomposites derived from its excellent hydrophilicity. The nanocomposites could be removed rapidly by an external magnet and regenerated for repeated adsorption of BPA in water. The proposed method has potential applications for efficient removal of BPA in environmental waters.
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Zhe Yang,Xiaowen Ma,Chao Shan,Xiaohong Guan,Weiming Zhang,Lu Lv,Bingcai Pan
To activate zero-valent iron (ZVI) for efficient nitrobenzene (NB) reduction, a hybrid Fe 0 /Fe 3 O 4 /FeCl 2 microcomposite (hZVI bm ) was synthesized via simple ball-milling of the ternary mixture of ZVI, Fe 3 O 4 , and FeCl 2 ·4H 2 O (hZVI). SEM-EDX and time-of-flight secondary ion mass spectroscopy (ToF-SIMS) indicated the hZVI bm microcomposite (10–20 μm) consisted of Fe 0 core covered by ∼3.3 μm-thick shell decorated with Fe 3 O 4 /FeCl 2 fine particles (0.1–2 μm). Efficient removal (>95%) of NB (200 mg/L) was achieved by hZVI bm (2.0 g Fe/L) in 30 min over a wide pH range from 3 to 9. Notably, the NB removal efficiency of hZVI bm was over 30 times higher than the virgin ZVI or over three times higher than hZVI. The enhanced reactivity synergistically resulted from both chemical and physical aspects. Chemically, the Fe 3 O 4 /FeCl 2 -inlaid shell and the Fe(II) components played significant activation roles, as observed from the comparative experiments in their absence via pretreatments of hZVI bm by sonication and rinsing, respectively, with direct evidence of depassivation effect by XRD analysis. Physically, the ball-milling-induced inter-particle compaction effect was considered crucial to facilitate the interfacial mass/electron transfer processes during the reduction. The reduction pathway from NB to aniline via two intermediates was analyzed by liquid chromatography.
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高影响因子
危险品化学品经营许可证（带存储）