JOURNAL OF SEPARATION SCIENCE
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2020
·Vol. 43
·期 17
·3499-3508
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IF 2.878
Yinan Guo,Wei Wei,Ying Zhang,Yuanyuan Dai,Weiping Wang,Aijun Wang
An aptamer (Apt) functionalized magnetic material was prepared by covalently link Apt to Fe 3 O 4 /graphene oxide (Fe 3 O 4 /GO) composite by 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride and N -hydroxysuccinimide, and then characterized by FTIR spectroscopy, X-ray diffraction, and vibration sample magnetometry. The obtained composite of Fe 3 O 4 /GO/Apt was employed as magnetic solid-phase extraction adsorbent for the selective preconcentration of sulfadimethoxine prior to analysis by high-performance liquid chromatography. Under the optimal conditions (sample pH of 4.0, sorbent dosage of 20 mg, extraction time of 3 h, and methanol-5% acetic acid solution as eluent), a good linear relationship was obtained between the peak area and concentration of sulfadimethoxine in the range of 5.0 to 1500.0 µg/L with correlation coefficient of 0.9997. The limit of detection ( S/N = 3) was 3.3 µg/L. The developed method was successfully applied to the analysis of sulfadimethoxine in milk with recoveries in the range of 75.9-92.3% and relative standard deviations less than 8.1%. The adsorption mechanism of Fe 3 O 4 /GO/Apt toward sulfadimethoxine was studied through the adsorption kinetics and adsorption isotherms, and the results show that the adsorption process fits well with the pseudo-second-order kinetic model and the adsorbate on Fe 3 O 4 /GO/Apt is multilayer and heterogeneous.
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ACS Applied Materials & Interfaces
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2020
·
IF 8.758
Katam Srinivas,Yuanfu Chen,Bin Wang,Bo Yu,Xinqiang Wang,Yang Hu,Yingjiong Lu,Wenxin Li,Wanli Zhang,Dongxu Yang
Because of the sluggish oxygen evolution kinetics, it is extremely important but still challenging to develop low-cost, efficient, and stable electrocatalysts for oxygen evolution reaction (OER) to enhance the efficiency of water electrolysis. Herein, for the first time, we present a novel heterostructure catalyst, constructed by ultrafine NiS/Fe3O4 heterostructural nanoparticles decorated on a carbon nanotube (CNT) matrix (NiS/Fe3O4 HNPs@CNT), which is synthesized by a facile hydrothermal reaction and subsequent sulfurization process. The NiS/Fe3O4 HNPs@CNT hybrid delivers superior OER activity in alkaline medium: it delivers a current density of 10 mA cm–2 at an ultralow overpotential of 243 mV with a small Tafel slope of 44.2 mV dec–1, which outperforms the benchmark RuO2 electrocatalyst; moreover, it exhibits terrific long-term stability over 36 h without any noticeable performance decay. The exceptional OER performance can be attributed to the unique nanoarchitecture, high conductivity of the CNT matrix, and particularly, the interaction between the Ni and Fe species in NiS/Fe3O4 heterostructural nanoparticles. This work introduces a sensible nanoarchitecture design with a facile and novel fabrication strategy to attain nonprecious metal-based composite catalysts with high OER performance and outstanding long-term stability.
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COLLOIDS AND SURFACES B-BIOINTERFACES
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2019
·
IF 3.973
Wenning Yang,Jia Li,Mingyue Wang,Xiaofan Sun,Yong Liu,Jie Yang,Dickon H.L. Ng
A novel core-shell Fe 3 O 4 /CoFe-LDH (layered double hydroxides) hybrid as a peroxidase mimic for the colorimetric detection of ascorbic acid was first fabricated via a facile two-step route. The resulting Fe 3 O 4 /CoFe-LDH hybrid exhibited much higher peroxidase-like catalytic activity for the oxidation of 3,3′,5,5′- tetramethylbenzidine (TMB) with H 2 O 2 than the pristine Fe 3 O 4 and CoFe-LDH nanosheets owing to the unique hierarchical architecture containing more exposed active sites and the synergistic effect between Fe 3 O 4 and CoFe-LDH. A sensitively and selectively visual sensor for the determination of ascorbic acid (AA) was successfully constructed based on the reduction effect of AA with enediol group on the formed oxidation of TMB, which exhibited a sensitive response to AA in the range of 0.5 ∼ 10 μM with the detection limit of 0.2 μM. Additionally, the Fe 3 O 4 /CoFe-LDH magnetic hybrid could be easily recycled by applying a magnetic field. This work provided a feasible means for the fabrication of magnetic nanomaterials with encouraging prospect in biosensing, environmental monitoring and medical diagnostics.
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Journal of Materials Chemistry C
·
2019
·Vol. 8
·期 6
·2123-2134
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IF 6.641
Zhen Xiang,Juan Xiong,Baiwen Deng,Erbiao Cui,Lunzhou Yu,Qingwen Zeng,Ke Pei,Renchao Che,Wei Lu
Developing electromagnetic absorption materials with a strong absorption ability and wide absorption bandwidth has attracted widespread attention in the field of electromagnetic shielding, but it still remains a great challenge. Herein, we successfully developed 2D hierarchically laminated Fe3O4@nanoporous carbon (NPC)@rGO magnetic/dielectric nanocomposites as high-performance microwave absorbers through a facile microwave-assisted approach. The rational design of the composition (Fe3O4, NPC and rGO) and the hierarchical microstructure provided the nanocomposite with a micro-scale 3D magnetic coupling network, a hierarchical dielectric carbon network and good impedance matching, which were identified by the off-axis electronic holography and electromagnetic characterization. As expected, the Fe3O4@NPC@rGO composites achieved a strong reflection loss of −72.6 dB, a matching thickness of 2.0 mm and a broad bandwidth of 5.5 GHz. Such excellent achievements encourage the development of hierarchical magnetic EMA absorbers and provide remarkable inspiration for designing high-performance microwave absorbers.
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Artificial Cells Nanomedicine and Biotechnology
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2019
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IF 4.462
Chenghua Liang,Nan Li,Zikai Cai,Rongpu Liang,Xiaoming Zheng,Li Deng,Longbao Feng,Rui Guo,Bo Wei
At present, cancer is the first cause of death for humans, but early detection and treatment can help improve prognoses and reduce mortality. However, further development of carrier-assistant drug delivery systems (DDSs) is retarded by the aspects such as the low drug-carrying capacity, carrier-induced toxicity and immunogenicity, complex synthesis manipulation. The development of nanoscale drug delivery systems (NDDS) have been rapidly developed to address these issues. In this article, we used PLGA-PEG with good biocompatibility to encapsulate Fe3O4 nanoparticles (a magnetic resonance imaging contrast agent) and DOX (an antitumour drug) via the emulsion-solvent evaporation method, aimed at achieving a dual function of the early detection and the treatment of mammary cancer. The results showed that the Fe3O4/DOX/PLGA-PEG nanoparticles had a relatively uniform size, a high carrier rate of Fe3O4 and high encapsulation efficiency of DOX, and a relatively high activity of released DOX within 120 h. In addition, in vitro studies showed that the Fe3O4/DOX/PLGA-PEG nanoparticles were cytocompatibility in NIH 3T3 fibroblast cells culture study while had a special effect on destroying human breast cancer MCF-7 cells compared with pure DOX solution. In vitro studies revealed that the Fe3O4/DOX/PLGA-PEG enabled enhanced T2 contrast magnetic resonance. Overall, our multifunctional Fe3O4/DOX/PLGA-PEG nanoparticles, composed of biocompatible substances and therapeutic/imaging materials, have great potential for the early detection of cancer and accurate drug delivery via the dynamic monitoring using MRI.
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APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Chengxin Wang,Sadaf Mutahir,Liang Wang,Wu Lei,Xifeng Xia,Xinyan Jiao,QingLi Hao
Herein, a double-buffering strategy is presented to boost the lithium storage potential of Fe 3 O 4 . Firstly, the skeleton of MIL-100 (Fe) MOF is grown on graphene oxide, as a self-assembled template via in-situ solvothermal approach, which transform into ultrafine, well-dispersed and mesoporous carbon coated Fe 3 O 4 QDs (4 nm) imbedded on reduced graphene oxide (Fe 3 O 4 QDs@C/rGO), by pyrolysis. Each component in such a well-designed porous hierarchical structure significantly contributes to the remarkable enhancement of lithium ion storage performance, leading to high reversible capability with excellent prolonged cyclic stability after 2000 cycles (505 mAh g −1 at 2.0 A g −1 ). Both, Graphene sheets and mesoporous carbon act as conductive support for anchoring uniform Fe 3 O 4 QDs with confined double buffering for cyclic volume flux. Multi-channels with uniform mesopores in the self-assembled array and 4 nm QDs of Fe 3 O 4 confined in conductive carbon shells were favorable to enhance the interfacial electron/ion transfer, leading to the excellent rate and cycling performance with released volume changes upon Li + insertion/extraction. The present research work provides a promising outset design and synthesis strategies for metal oxide QDs based nanocomposites, which may also be extended to the other electrode material system.
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JOURNAL OF FOOD SCIENCE
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2019
·Vol. 84
·期 12
·3624-3633
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IF 2.081
Chunyan Tu,Yinan Guo,Yuanyuan Dai,Wei Wei,Weiping Wang,Liang Wu,Aijun Wang
An aptamer-functionalized Fe 3 O 4 /graphene oxide was synthesized by chemical co-precipitation method and then employed in the magnetic solid-phase extraction for selective enrichment of chloramphenicol before HPLC. The aptamer was covalently bonded to the Fe 3 O 4 /graphene oxide complex by 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride and N -hydroxysuccinimide. Parameters affecting extraction efficiency including solution pH, extraction time and temperature, types and volume of elution solvent, and elution time were investigated in detail. Under the optimal conditions, good linearity was obtained between the peak area and analyte concentration in the range of 7.0 to 1.0 × 10 3 µg/L with the correlation coefficient of 0.9994. The limit of detection and quantitation were 0.24 µg/L and 0.79 µg/L, respectively. The developed method was employed to the analysis of chloramphenicol in honey and milk samples. The recoveries ranged from 80.5% to 105.0% with relative standard deviations less than 8.9%. Practical Application An aptamer-functionalized Fe 3 O 4 /graphene oxide was synthesized and employed in magnetic solid phase extraction for the enrichment of chloramphenicol before HPLC. The presented assay was employed for the determination of chloramphenicol in honey and milk with satisfactory results.
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ACS Omega
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2023
·
IF 4.1
Jianqiao Kong,Song Xu,Yang Dai,Yi Wang,Yun Zhao,Peng Zhang
Chemotherapeutic agents fail in clinical chemotherapy in the absence of targeting and acquired resistance. We, therefore, synthesized Fe3O4@ZIF-8@Sor@TA nanocomposite drugs based on the drug delivery properties of nanomaterials. ZIF-8 is a nanomaterial with a porous structure that can load anticancer drugs. The nanodrug used the paramagnetic property of Fe3O4 to deliver sorafenib (Sor) precisely to the tumor site, then used the pH responsiveness of ZIF-8 to slowly release Sor in the tumor microenvironment, and finally used tannic acid (TA) to inhibit P-glycoprotein to suppress the Sor resistance. The results of material characterization presented that the prepared material was structurally stable and was able to achieve a cumulative drug release of 38.2% at pH 5.0 for 72 h. The good biocompatibility of the composite was demonstrated by in vitro and in vivo experiments, which could improve antitumor activity and reduce Sor resistance through magnetic targeting TA. In conclusion, the Fe3O4@ZIF-8@Sor@TA material prepared in this study demonstrated high antitumor activity in hepatocellular carcinoma treatment, promising to reduce drug resistance and providing a novel research approach for cancer treatment.
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ENVIRONMENTAL ENGINEERING SCIENCE
·
2023
·
IF 1.8
Liping Wei,Kexin Zhou,Qian Rao,Hui-qiang Li,Ping Yang
Methylisothiazolinone (MIT) is a commonly used bactericide in wastewater treatment. Residual MIT in wastewater can lead to high environmental risks and toxicity. In this work, an emerging material MXenes has been introduced into the heterogeneous electro-Fenton catalysts to degrade MIT. Ti3C2Tx@Fe3O4, V2CTx@Fe3O4, and Mo2CTx@Fe3O4 were assessed as catalysts for MIT removal.The reasons for the differences among the three catalyst effects were analyzed according to different characterization results. Mo2CTx@Fe3O4 exhibited the best catalytic activity for MIT degradation. At pH = 3, the removal rate of MIT and corresponding chemical oxygen demand of catalyst Mo2CTx@Fe3O4 were 93.41% and 62.46% after 120 min.Among the three catalysts, Mo2CTx@Fe3O4 had larger surface area and porosity. Mo2CTx@Fe3O4 had the highest surface iron content, which meant that Fe3O4 was more easily loaded on the surface of Mo2CTX. What is more, Mo2CTX had the strongest ability to accelerate the regeneration of Fe2+. The durability of Mo2CTx@Fe3O4 was also evaluated. After four cycles, the removal efficiency of MIT only decreased from 92.51% to 89%. This work supports the development of heterogeneous electro-Fenton catalysts and the degradation of MIT.
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CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Tao Zeng,Shasha Xia,Shuqi Li,Xiuxiu Hong,Yashuang Wang,Lintuo Wang,Xinwen Huang
The utilization of renewable solar energy through near-infrared (NIR)-driven photothermal catalysts offers a potential novel strategy for environmental remediation. In this work, we reported an initial demonstration of the peroxydisulfate (PDS) activation in oxidative degradation of organics (represented by bisphenol A (BPA)) via a unique NIR light-to-heat conversion effect using cost-effective and biocompatible nanoparticles (NPs). The systematical investigation of the photothermal experiments found that Fe 3 O 4 magnetic NPs exhibit great photothermal conversion efficiency (65.4%) and have the capability to quickly elevate the system temperature to 61°C. The increased reaction temperature leads to the homolytic fission of the O O bond for producing sulfate radical (SO 4 − ) and the derivative hydroxyl radical ( OH), as confirmed by the radical quenching and electron paramagnetic resonances (EPR) tests, and in turn accelerates the thermocatalytic degradation reaction of BPA. The BPA degradation reaction rate of the NIR/Fe 3 O 4 /PDS system is about 25.8 times and 9.4 times of that in the NIR/PDS and Fe 3 O 4 /PDS systems, respectively. Both photothermal heating and surface valence states conversion of Fe 2+ /Fe 3+ on Fe 3 O 4 under dark conditions make a contribution to the observed oxidation reactions. Moreover, this NIR light-to-heat activation system exhibits efficient photocatalytic degradation of BPA molecules in deep water by virtue of the deep penetration capability of NIR light in water, highlighting NIR-driven photothermal catalysts hold the excellent potential to be applied in practical water restoration through PDS activation.
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ENVIRONMENTAL POLLUTION
·
2023
·
IF 8.9
Jishao Jiang,Rui Hou,Huilin Cui,Dong Liu,Guangxuan Yan,Yujuan Fan,Ke Cheng,Zhiguo Cao
New pollutants, pharmaceuticals and personal care products (PPCPs), accumulate in sewage sludge (SS) in wastewater treatment plants (WWTPs), posing risks to the environment and to human health. In the present study, the fates of typical PPCPs, carbamazepine (CBZ), triclosan (TCS), ibuprofen (IBU) and galaxolide (HHCB), were examined during WW treatment. Additionally, SS collected from a WWTP was used for aerobic composting to investigate the influences of micron-sized Fe 3 O 4 (M-Fe) and nano-sized Fe 3 O 4 (N–Fe) on the degradation of these PPCPs and the succession of microbial communities during the composting process. The results showed that the mean concentrations of CBZ, TCS, IBU and HHCB in the influent of the WWTP were 926.5, 174.4, 8869, and 967.3 ng/g, respectively, and in the effluent were 107.6, 47.0, 283.4, and 88.4 ng/g, respectively. The removal rate averaged ∼80%, while the enrichment rates of the PPCPs in SS ranged from 37.2% to 60.5%. M-Fe and N–Fe reduced NH 3 emissions by 32.9% and 54.1% and N 2 O emissions by 26.2% and 50.8%, respectively. Moreover, the addition of M-Fe and N–Fe effectively increased PPCP degradation rates 1.12–1.66-fold. During the whole process, the additions of M-Fe and N–Fe significantly shifted microbial community structure, and the abundances of Proteobacteria, Chloroflexi, and Actinobacteria were increased during the thermophilic stage, marking them as key PPCP-degrading phyla. Taken together, our results indicated that the addition of M-Fe and N–Fe is an effective method for improving the quality of end compost and accelerating the degradation of PPCPs.
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Materials Today Communications
·
2023
·
IF 3.8
Jianye Shi,Jin Chen,Xinle Wang,Zhikang Liu,Yuzhao Ma,Xiaofeng Yang,Meidan Que,Yanjun Li
Developing a lightweight microwave absorbing materials with high absorption capacity and wide absorption bandwidth at low thickness is a perennial challenge in practical applications in the microwave absorption (MA) field. Herein, sandwich-like heterogeneous Ti 3 C 2 T x /TiO 2 /Fe 3 O 4 /Fe are designed by synergistically incorporating dielectric-magnetic components with a simple solvothermal method and post-annealing. The sandwich-like heterogeneous interface produces sufficient conduction loss for Ti 3 C 2 T x /TiO 2 /Fe 3 O 4 /Fe, with TiO 2 crystals and amorphous carbon anchored on its surface to enhance interface polarization and Debye relaxation. Additionally, the presence of Fe nanoparticles induces magnetic loss, including natural resonance and eddy current loss. By bidirectionally regulating the ratio of Ti 3 C 2 T x and Fe 3 O 4 , the minimum reflection loss (RL min ) value reaches − 64.6 dB at 17.49 GHz with a 1.48 mm thickness, and the corresponding effective absorption bandwidth (EAB, RL < −10 dB) is 4.59 GHz (13.41–18 GHz). The results suggest that the exceptional EMW absorption performance of composites can be attributed to the dielectric-magnetic synergistic effect and sandwich-like heterostructures . This study offers a rational approach for synthesizing ultrathin and lightweight Ti 3 C 2 T x -based absorbers.
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