CHEMICAL ENGINEERING JOURNAL
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2017
·
IF 6.216
Zhi Zhu,Pengwei Huo,Ziyang Lu,Yongsheng Yan,Zhi Liu,Weidong Shi,Chunxiang Li,Hongjun Dong
A novel efficient magnetic oxidation-reduction like-Z-scheme structure photocatalyst composed of g-C 3 N 4 , CdS and the oxidation-reduction mediators of Fe 3 O 4 is successfully synthesized by heat treatment methods. The like-Z-scheme CdS/Fe 3 O 4 /g-C 3 N 4 photocatalyst exhibits universal degradation property on removing kinds of antibiotics, and the photocatalytic activity is better than that of CdS/g-C 3 N 4 and pure g-C 3 N 4 . The excellent photocatalytic performance is originated from the unique like-Z-scheme structure and oxidation–reduction function of Fe 3 O 4 , which effectively separates the hole-electron and sufficiently utilizes the photogenerated carriers for generating more active radicals. The results showed that when the content of Fe 3 O 4 is 10%, the CdS/Fe 3 O 4 /g-C 3 N 4 exhibited superior activity. The best degradation rate constant K in the like-Z-scheme photocatalyst is approximately 26 times of pure g-C 3 N 4 . The important role of Fe 3 O 4 and the photocatalytic mechanism are also discussed in detail. This work not only puts forward a novel design idea of the like-Z-scheme material, but also is expected to be widely applied to the universal removal of kinds of antibiotics according to the practical requirement.
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高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Yuanqian Xiong,Xiaoyu Gao,Yu Wang,Xiangrui Deng,Chunhong Xiong,Jinsheng Zhang,Qianhui Gu,Ganhui Huang
Norfloxacin (NOR) is now extensively used for the treatment of human and animal diseases. Unfortunately, large accumulations of NOR will pose a significant threat to the human body. Thus, it is urgent to develop a rapid and sensitive detection technique for the trace determination of NOR. In this study, an electrochemical molecular imprinting sensor with great properties was fabricated for the determination of NOR in milk and environmental water. The incorporation of bovine serum proteins produced a hybrid recognition interface consisting of molecularly imprinted polymers and peptides that provided good recognition properties for norfloxacin. The Fe 3 O 4 @ZIF-8 was distributed orderly on the electrode after the embedding of the magnets inside the electrode, then the BSA was coated on the electrode with the electrodeposited AuNPs through Au-S bonding. The sensor constructed in this study achieved ultra-sensitive detection of norfloxacin with an effective area of 0.08433 cm 2 , a limit of detection (LOD) of 0.108 pmol·L −1 , and a wide linear range (1 ∼ 100, 100 ∼ 1000 and 1000 ∼ 8000 pmol·L −1 ). The prepared sensors exhibited satisfactory performance in the detection of milk and environmental water, with acceptable recoveries ranging from 96.24 % to 104.88 %, and the relative standard deviation (RSD) was no more than 4.84 %.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yunxiang Bai,Xinxue Qiu,Deqiang Chen,Junwei Zheng,Liangliang Dong,Chunfang Zhang
Magnetic mixed matrix membranes (MMMs) show great potential for enhancing O 2 /N 2 separation efficiency by leveraging the inherent magnetic property differences between O 2 (paramagnetic) and N 2 (diamagnetic). However, one of the major challenges is the establishment and precise control of magnetic channels between magnetic fillers and polymer matrix. To address this issue, herein, ZIF-8 wrapped Fe 3 O 4 nanoparticles (Fe 3 O 4 @ZIF-8) were synthesized using a step-by-step assembly method, and then integrated into polymer of intrinsic microporosity (PIM-1) matrix to develop MMMs with well-defined magnetic channels for O 2 /N 2 separation. In comparison with Fe 3 O 4 , Fe 3 O 4 @ZIF-8 nanoparticles exhibited significantly enhanced compatibility with the polymer matrix, thereby facilitating uniform dispersion and improving interfacial adhesion. Gas permeation experiments revealed that the magnetic PIM-1/Fe 3 O 4 @ZIF-8 MMMs demonstrated enhanced O 2 /N 2 separation performance due to the combined effects of magnetic responsiveness and the presence of ZIF-8 magnetic channels. Under a magnetic field strength of 56mT, the magnetic MMM with a 4 wt% loading of Fe 3 O 4 @ZIF-8 exhibited optimal O 2 /N 2 separation performance with O 2 permeability of 710 Barrer and O 2 /N 2 selectivity of 3.64. These values represented a significant improvement of 42% and 24%, respectively, compared to pure PIM-1 membrane. Moreover, the simultaneous improvement of permeability and selectivity enabled the achievement of Robeson’s 2008 upper bound for O 2 /N 2 separation, underscoring the great potential of Fe 3 O 4 @ZIF-8 nanoparticles for designing magnetic MMMs with favorable structural attributes and exceptional separation efficiency.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Meijun Liu,Yuxin Wang,Yueqi Chen,Tingting Zhang,Zhenbin Zhang,Houfen Li,Fengjun Shan,Taigang Ma
Hexavalent chromium (Cr(VI)) is one of the hazardous pollutants in wastewater because of acute toxicity and superb solubility. Graphene oxide (GO) is the promising adsorbent to handle Cr(VI), however, the drawbacks of easy aggregation, limited adsorption sites, unable valence changes and difficult recyclability hinder its further applications. In this study, Fe 3 O 4 modified L-glutamic acid functionalized graphene oxide (M−Glu/GO) was synthesized for Cr(VI) decontamination by the solvothermal method for effectively offsetting the above shortcomings. From characterization results, M−Glu/GO carried the traits of the relatively bigger surface area, abundant active sites, favorable surface charges and stable magnetic property. Cr(VI) adsorption process by M−Glu/GO was conformed to the pseudo-second order kinetic model with fast adsorption rate ( k 2 = 1.75 × 10 –3 g·mg −1 ·min −1 ) and Freundlich isotherm model with the maximum adsorption capacity of 75.63 mg·g −1 at 308 K, far more exceeding than GO (6.38 mg·g −1 ). Surprisingly, with the help of oxygen-containing groups, amine groups and Fe 3 O 4 with ample electron supplement, M−Glu/GO was capable of transforming partly Cr(VI) into Cr(III), realizing the detoxification. It exhibited practical application potentials with magnetic separation under various water matrices and kept a relative adsorption capacity of 70 % after 8 cycles. Furthermore, six interactions, involving pore filling, hydrophilic interactions, coordination interactions, anion-π interactions, electrostatic interactions and adsorption-reduction, witnessed the satisfied Cr(VI) adsorption by M−Glu/GO. This work paves a feasible way to accelerate the Cr(VI) adsorptive removal, and provides a vivid case for developing recyclable GO-functionalized adsorbents.
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高影响因子
RSC Advances
·
2024
·Vol. 14
·期 24
·16727-16735
·
IF 3.9
Huizhong Wu,Qiong Yi,Xiang Li,Yingxi Wang,Ling Li
Low catalytic efficiency and catalyst recovery are the key factors limiting the practical application of advanced oxidation processes. In this work, a core–shell magnetic nanostructure Fe3O4@MIL-101(Fe, Co) was prepared via a simple solvothermal method. The core–shell structure and magnetic recovery performance were characterized by various technologies. The results of dye degradation experiments proved that within 10 minutes, the Fe3O4@MIL-101(Fe, Co)/PMS system can degrade more than 95% of 10 mg per L Rhodamine (RhB) at an initial pH of 7, which possesses higher catalytic activity than the Fe3O4/PMS system and the MIL-101(Fe, Co)/PMS system. The effects of initial solution pH and coexisting anions in water on the degradation of RhB were further discussed. The results showed that Fe3O4@MIL-101(Fe, Co) displayed excellent degradation efficiency in a wide pH range of 3–11 and capability of resisting coexisting anions. It is worth mentioning that after five cycles, the RhB removal rate can still be maintained at over 90% after 10 minutes of reaction. Free radical quenching experiments were further studied, confirming that ˙OH and SO4−˙ were involved in the degradation of RhB, while the dominating active free radical was SO4−˙. The possible reaction mechanism of the RhB degradation process was also inferred.
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PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 58
·53080-53088
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IF 3.289
Jie Liu,Zhiwei Zhao,Zhaoxia Ding,Zhendong Fang,Fuyi Cui
Magnetic Au–Fe3O4 nanocomposites with various Au weight loading were synthesized through a one step strategy. The morphology and physicochemical properties of the as-synthesized solids were characterized through various methods. After that, the catalysts were applied to activate H2O2 for the degradation of 4-chlorophenol (4-CP). The results showed that Au–Fe3O4 can catalyze oxidation of 4-CP efficiently in the presence of H2O2 at pH 5, which may be attributed to the synergistic catalysis in the nanocomposites for hydroxyl radical generation. And then, the influence of reaction parameters on the oxidation of 4-CP, including the Au weight loading of the nanocomposites, pH, catalyst dosage, H2O2 dosage and temperature, were assessed. The stabilization and reusability of the Au–Fe3O4 nanocomposites was shown to be excellent, with no leakage of Au. The hydroxyl radicals (˙OH) were the main reactive radicals released in the Au–Fe3O4/H2O2 system according to the addition of tert-butanol and the spin-trapping electron paramagnetic resonance (EPR) by means of 5,5-dimethyl-1-pyrroline-N-oxide (DMPO), while the ˙OH in the bulk solution acted in the main role for 4-CP degradation. Finally, the mechanism of H2O2 activated with Au–Fe3O4 for 4-CP degradation was proposed.
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高影响因子
RSC Advances
·
2016
·Vol. 6
·期 97
·94976-94988
·
IF 3.289
Longfei Liao,Ying Liu,Zengyong Li,Junping Zhuang,Yanbin Zhou,Size Chen
Amino modified Fe3O4@SiO2 (Fe3O4@SiO2–NH2) was used to immobilize Cu2+ and VO2+ for preparing Fe3O4@SiO2–NH2–Cu2+ and Fe3O4@SiO2–NH2–VO2+ catalysts. Various technologies had been used for the characteristics of catalysts, such as XRD, XPS, FT-IR, SEM, TEM and VSM. The catalytic performance of Fe3O4@SiO2–NH2–VO2+ in HMF oxidation could be significantly enhanced by the use of Fe3O4@SiO2–NH2–Cu2+ as the co-catalysts. The type of reaction solvents showed a great influence on the oxidation of HMF. The highest HMF conversion reached up to 98.7% at 110 °C in toluene with an optimal 2,5-diformylfuran yield of 85.5%. Moreover, the Fe3O4@SiO2–NH2–Cu2+ and Fe3O4@SiO2–NH2–VO2+ catalyst exhibited great stability and could be readily applied in the next recycle after magnetic separation.
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高影响因子
NPG Asia Materials
·
2017
·Vol. 9
·期 5
·e383
·
IF 9.157
Yin Ting,Zhang Qian,Wu Haigang,Gao Guo,Shapter Joseph G,Shen Yulan,He Qiaozhi,Huang Peng,Qi Wen,Cui Daxiang
Effectively prolonging the residence time of nanoprobes in the tumor region and reducing the accumulation of nanoprobes in the vital organs (for example, lung, liver and spleen) is crucial for high-efficiency photodynamic therapy (PDT) of cancer. Herein, we systematically report an ultra-small and highly stable nanoplatform with diameters of 4, 8 and 13 nm that exhibited excellent photodynamic therapeutic efficacy using Fe 3 O 4 @polymer-NPO/PEG-Glc@Ce6 nanoprobes. Based on the small size effect, the nanoprobes displayed lower cytotoxicity and excellent biocompatibility. Owing to the synergistic virtues of markedly active targeting and intrinsic small size effect, the Fe 3 O 4 @P-NPO/PEG-Glc@Ce6 nanoprobes can effectively prolong their residence time in the tumor region and reduce accumulation in the normal organs. Benefitting from the small size effect, the synthesized Fe 3 O 4 @P-NPO/PEG-Glc@Ce6 nanoprobes exhibited excellent tumor-targeting capability and photodynamic therapeutic efficacy by inhibiting the growth of tumors in mice under visible red light irradiation with a relatively lower power. The successful application of the small size effect in Fe 3 O 4 @P-NPO/PEG-Glc@Ce6 nanoprobes to significantly improve the PDT efficiency in our strategy suggests new building blocks for PDT of tumors and paves a new way for clinical therapies and translation in the near future.
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高影响因子
Materials
·
2017
·Vol. 10
·期 4
·411
·
IF 2.654
Jing Zhao,Ming Zeng,Kaiqiang Zheng,Xinhua He,Minqiang Xie,Xiaoyi Fu
Thermoresponsive P(NIPAM-AA)/Fe3O4/SiO2microspheres with surface holes serving as carriers were prepared using p-Fe3O4/SiO2microspheres with a thermoresponsive copolymer. The p-Fe3O4/SiO2microspheres was obtained using a modified Pickering method and chemical etching. The surface pore size of p-Fe3O4/SiO2microspheres was in the range of 18.3 nm~37.2 nm and the cavity size was approximately 60 nm, which are suitable for loading and transporting biological macromolecules. P(NIPAM-AA) was synthesized inside and outside of the p-Fe3O4/SiO2microspheres via atom transfer radical polymerization of NIPAM, MBA and AA. The volume phase transition temperature (VPTT) of the specifically designed P(NIPAM-AA)/Fe3O4/SiO2microspheres was 42.5 °C. The saturation magnetization of P(NIPAM-AA)/Fe3O4/SiO2microspheres was 72.7 emu/g. The P(NIPAM-AA)/Fe3O4/SiO2microspheres were used as carriers to study the loading and release behavior of BSA. This microsphere system shows potential for the loading of proteins as a drug delivery platform.Keywords:P(NIPAM-AA);Fe3O4/SiO2hollow microspheres;holes;drug release
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2016
·
IF 5.31
Yusun Zhou,Zhenyu He,Yun Tao,Yonghua Xiao,Tingting Zhou,Tao Jing,Yikai Zhou,Surong Mei
In this study, a novel silica membrane functionalized with amino group and octyl-perfluorinated chain was prepared on the periphery of Fe 3 O 4 nanoparticle (NP). The obtained nanocomposite (Fe 3 O 4 @SiO 2 -NH 2 &F 13 ) exhibited good selectivity for perfluorinated compounds (PFCs) by electrostatic and fluorine-fluorine (F-F) interaction with the addition of size exclusion effect. In ethanol, the monolayer coverage of PFCs occurred on most of the binding sites and the adsorption capacity were in the range of 13.20–111.14 mg g −1 . In aqueous solution, due to the hydrophobicity of perfluoroalkane chain, some PFCs (C ⩾ 8) may also stick together on the composite surface, which made the sorption amounts of these PFCs greatly enhanced. Thereafter, Fe 3 O 4 @SiO 2 -NH 2 &F 13 was used for rapid and selective removal of nine PFCs from surface water sample. In 1 L of spiked water samples fortified at 0.5–50 ng L −1 levels, the composite showed a better removal efficiency (86.29%) for PFCs than that (58.61%) of powdered activated carbon (PAC). In addition, high concentrations (5–50 mg L −1 ) of humic acid (HA) had no significant influence on the removal performance of the composite for PFCs. Furthermore, Fe 3 O 4 @SiO 2 -NH 2 &F 13 could be reused for several times with no obvious decrease in the removal efficiency. Thus, the magnetic nanocomposite could be used as an effective adsorbent for PFC removal from aquatic environment.
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高影响因子
MICROCHIMICA ACTA
·
2016
·Vol. 183
·期 8
·2467-2472
·
IF 4.831
Yang Yang,Ma Xiaowei,Feng Fan,Dang Xueping,Huang Jianlin,Chen Huaixia
The article describes the synthesis of core-shell magnetic nanoparticles (MNPs) of the type Fe 3 O 4 @MIL-100 (MIL standing for Material Institut Lavoisier), and their application as sorbent for magnetic solid-phase extraction (MSPE) of triclosan. The MNPs were prepared via circular self-assembly of ferric chloride and benzenetricarboxylic acid. The functionalized MNPs were characterized by transmission electron microscopy, FTIR and thermogravimetry. Following extraction, triclosan was eluted with ammoniacal methanol and then submitted to HPLC with UV detection. The amount of magnetic microspheres, sample pH and ionic strength, adsorption time, desorption time, desorption solvent and the volume of the eluent were optimized. Under optimum conditions, the method showed good linearity in the 0.1 to 50 mg·kg −1 triclosan concentration range in toothpaste samples. Other features include (a) intra-day and inter-day relative standard deviations (RSD, for n = 4) of <5.5 %, (b) a 30 μg·kg −1 limit of detection, and (c) extraction recoveries between 90.86 % and 101.1 %. The method was successfully applied to the determination of triclosan in children’s toothpaste.
The article describes the synthesis of core-shell magnetic nanoparticles (MNPs) of the type Fe 3 O 4 @MIL-100, and their application as sorbent for magnetic solid-phase extraction (MSPE) of triclosan.
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高影响因子
RSC Advances
·
2016
·Vol. 6
·期 63
·58511-58515
·
IF 3.289
Xiaomin Zhu,Shenping Zhang,Lihuo Zhang,Honglai Liu,Jun Hu
In situ interfacial growth of nanoparticles induced by the Pickering emulsion is a novel and convenient method for preparing hybrids/composites with specific tasks. For the first time, magnetic PMMA@Fe3O4/Cu3(BTC)2 hollow microspheres were produced by one-pot Pickering emulsion using Fe3O4 nanoparticle (NP) stabilizer. The Fe3O4 Pickering emulsion provided a large oil/water interface area for the in situ growth of Cu3(BTC)2 nanocrystals and further interfacial polymerization of polymethyl methacrylate (PMMA). The hollow hybrid microspheres showed synergetic multi-functions, including the magnetic separation property caused by Fe3O4 NPs, the reverse thermal expansion by PMMA, and the adsorption enhanced permeation by porous Cu3(BTC)2 NPs. When it was used as the drug carrier for ibuprofen, the good loading capacity and the controllable release duration confirmed its good properties. Moreover, all the realized synergetic advantages further reveled the potential promising applications of the interfacial synthesis by Pickering emulsion method.
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高影响因子
危险品化学品经营许可证（带存储）