ACS Applied Nano Materials
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2022
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IF 6.14
Zhoumei Xu,Fukai Chu,Xiaoyu Luo,Xin Jiang,Liang Cheng,Lei Song,Yanbei Hou,Weizhao Hu
In order to separate heavy-metal ions from contaminated wastewater and further realize the reutilization of waste adsorbent, magnetic composites with flowerlike structure were successfully synthesized. After the absorption of Cu2+ ions, hybrids can be used as effective coatings to enhance the fire safety of flexible polyurethane foam (FPUF) through a dip-coating method. As-fabricated metal–organic framework (MOF)-based composites exhibited a core–shell and flowerlike structure with high thermal stability. The maximum adsorption capacity for Cu2+ could reach 292.13 mg·g–1, calculated from the Langmuir isotherm model. In order to reutilize the adsorbed Cu2+ ions, the CuO-loaded MOF-derived Fe3O4@ZnO@CuO (MO) was obtained with a simple heat treatment. The effectivity of MO as a fire-safety coating for inhibiting the release of heat and toxic gases of FPUF was satisfactory. The application of this MOF-based composite will provide useful insights into the design of bifunctional materials for efficient wastewater remediation and fire-safety coatings.
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JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2022
·Vol. 169
·期 9
·097501
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IF 4.386
Dongmei Ren,Xingwen Wang,Chunpeng Leng,Wei Meng,Jingrui Zhang,Chao Han
4-Nitrophenol (4-NP) is a typical organic pollutant, thus it is urgent to detect it in environmental samples. This study rationally designed a novel electrode material of P-doping Fe/Fe3O4@C (P-Fe/Fe3O4@C) prepared with MIL-88 as precursor. P2h-Fe/Fe3O4@C-700 was synthesized by calcining MIL-88 at 700 °C, followed by annealing process with NaH2PO2 for 2 h. The P2h-Fe/Fe3O4@C-700 modified glassy carbon electrode (P2h-Fe/Fe3O4@C-700/GCE) showed a high electrocatalytic activity toward 4-NP reduction due to its active metal center, fine-tuned electronic structure by P-doping, as well as good electrical conductivity. It exhibited excellent sensing behaviors in 4-NP detection with rather high sensitivities of 1415.43 μA·mM−1·cm−2 and 424.63 μA·mM−1·cm−2 in the 4-NP concentration of 5 to 100 μM and 100 to 1200 μM, respectively, with a low detection limit of 0.462 μM. The P2h-Fe/Fe3O4@C-700/GCE still had good selectivity for 4-NP detection in the presence of common interferences. In addition, it was found that the current response towards 4-NP at P2h-Fe/Fe3O4@C-700/GCE retained more than 97% of its initial value after one week, indicating a good long-term stability. Furthermore, the P2h-Fe/Fe3O4@C-700/GCE exhibited a good reproducibility. The constructed P2h-Fe/Fe3O4@C-700/GCE achieved practical uses for the sensing of 4-NP in tap water with satisfactory recoveries.
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Scientific Reports
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2022
·Vol. 12
·期 1
·1-12
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IF 4.996
Zhang Zhi-xuan,Lv Lu,Shi Ai-hua,Li Yun-hao,Wang Tian-ren,Guo Yuan-hang,Hu Bao-juan,Yan Xiao-peng,Fu Jun-ke,Ma Feng,Wang Hao-hua,Lv Yi,Zhang Yong
Many methods are used to locate preoperative small pulmonary nodules. However, deficiencies of complications and success rates exist. We introduce a novel magnetic gel for small pulmonary nodules localization in rabbit model, and furtherly evaluate its safety and feasibility. Rabbits were used as the experimental objects. A magnetic gel was used as a tracer magnet, mixed as sodium alginate-Fe 3 O 4 magnetic fluid and calcium gluconate solution. In short-term localization, a coaxial double-cavity puncture needle was applied to inject the gel into the lung after thoracotomy, and a pursuit magnet made of Nd-Fe-B permanent magnetic materials was used to attract the gel representing location of the nodule. In long-term localization, the gel was injected under X-ray guidance. Imaging changes to the lung were observed under X-ray daily. Thoracotomy was performed to excise tissue containing the gel, and hematoxylin–eosin staining was used to observe the tissue on postoperative days 1, 3, 5, and 7. Observe tissues morphology of heart, liver, spleen, and kidney in the same way. The gel was formed after injection and drew lung tissue to form a protrusion from the lung surface under the applied magnetic field. No complication was observed. The shape and position of the gel had not changed when viewed under X-ray. Pathological analysis showed the gel had a clear boundary without diffusion of magnetic fluid. All tissues retained good histologic morphology and no magnetic fluid was observed. Our study preliminarily suggested that the technique using sodium alginate-Fe 3 O 4 magnetic gel to locate small pulmonary nodules with guidance of X-ray, and to search for them under an applied magnetic field during the operation is safe and feasible.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Fang Chengqian,Dai Yimin,Chen Ling,Wang Zhiheng,Lu Qi,Li Yaqi,Cai Ling,Liu Bo,Zhang Yue-Fei,Li Yan,Wan Li
A magnetic Cl − -intercalated Fe 3 O 4 @SiO 2 @MgAl-Cl − LDH nanocomposite has been successfully synthesized by modified one-step salt-assisted coprecipitation process. The Fe 3 O 4 @SiO 2 @MgAl-Cl − LDH nanocomposite was characterized by FTIR, XRD, XPS, SEM, HRTEM, BET and VSM. The results showed that the Fe 3 O 4 @SiO 2 @MgAl-Cl − LDH particles possessed core (Fe 3 O 4 @SiO 2 ) shell (Cl − -LDH) structures and magnetic properties, and Cl − anions were successfully introduced into LDH interlayers. The unique intercalated structure with week interlayer interaction of Fe 3 O 4 @SiO 2 @MgAl-Cl − LDH provide efficient adsorption of methyl orange (MO), Congo red (CR) and methyl blue (MB), leading to its superior performance with much higher uptake capability with the maximum adsorption capacity of MO, CR and MB reaching 733 mg·g −1 , 910 mg·g −1 and 385 mg·g −1 , respectively. The adsorption process could be well described by pseudo-second-order model for MO, CR and MB. The experimental data of MO and CR could be fitted better with Freundlich model, while that of MB were fitted better with Langmuir model. The adsorption process was spontaneous and exothermic for MO and MB, while spontaneous and endothermic for CR. Moreover, the adsorbent exhibits excellent stability and reusability in the regeneration cycle, and a process called ‘‘post-processing step” is proposed to effectively improve the dye removal ability of the adsorbent in reuse. This study puts forward a new thought for the development of high-performance LDH adsorbents with mesoporous and Cl − intercalation structure for the efficient and rapid removal of dyes.
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ACS Sustainable Chemistry & Engineering
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2022
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IF 9.224
Jiabi Xu,Jiayi Peng,Xiangting Wang,Xiaohong Hou
Nanozymes have gradually become a research hotspot in the field of enzymology, benefiting from their low cost, high stability, and availability. To break through the limitation that conventional nanozymes exert peroxidase-like (POD-like) activity under only acidic conditions, we rationally designed Fe3O4@MIL-100(Fe) with excellent superparamagnetism and catalytic activity. An optimization of the microwave-assisted in situ synthesis conditions was carried out to obtain the highest POD-like activity of the nanozyme under nearly neutral conditions. Adenosine triphosphate (ATP) was appointed as an auxiliary regulator to further amplify the activity of the nanozyme Fe3O4@MIL-100(Fe). A series of behaviors related to enzymology and the mechanism of ATP-assisted enhancement were further explored. Consequently, a colorimetric sensing strategy was proposed for the one-step detection of cholesterol with a linear range of 0.05–0.4 mM and a limit of detection (LOD) of 1.3 μM (3.3 δ/S). The result of the present work implied that the established one-step platform could be successfully applied to the detection of cholesterol in actual samples. From the nanozyme synthesis to the colorimetric sensing process, the concepts of time savings and straightforwardness were always upheld and satisfactorily implemented. Most importantly, Fe3O4@MIL-100(Fe) could be a great potential biocatalyst candidate for the development of the corresponding commercial kits.
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Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 42
·22453-22467
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IF 14.511
Huihua Luo,Lianqing Yu,Kehui Xue,Haifeng Zhu,Yaping Zhang
Photocatalytic water splitting into value-added energy is a promising strategy to resolve the environmental pollution and energy crisis. Herein, we proposed a facile method to design a p–n heterostructure photocatalyst for highly effective and stable visible light-driven hydrogen production. Starting from a framework of metal–organic framework (MOF) derived carbonaceous material (CNCo-Fe3O4) with a spindle-like structure, we demonstrated ultrathin ZnIn2S4 (ZIS) nanosheets grown on the surface of the rich porous CNCo-Fe3O4 spindle-like structure (denoted as CNCo-Fe3O4/ZIS). The intimate coupling between CNCo-Fe3O4 and ZnIn2S4 facilitates charge transfer and inhibits the recombination of electron and hole pairs, resulting in fast reaction kinetics at the heterointerface. Furthermore, the conductivity and structural integrity of the catalysts are further enhanced by MOF-derived carbonaceous materials. Both high H2 yield (2.63 mmol g−1 h−1) and long-term stability are achieved for 5% CNCo-Fe3O4/ZIS heterostructure catalysts under visible-light irradiation (λ ≥ 420 nm), ascribed to the enhanced light absorption capacity, conductivity and charge separation ability. The designed nanoarchitecture may inspire more possibilities for the synthesis of MOF-derived carbonaceous material compositions with semiconductors for wide applications.
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BIOCHEMICAL ENGINEERING JOURNAL
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2022
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IF 4.446
Xu Pan,Wenjing Wang,Ye Chen,Qing Wen,Xiaoqian Li,Cunguo Lin,Junhong Wang,Haitao Xu,Liuqingying Yang
As a promising green and storage/conversion technology, the microbial fuel cell (MFC) was generally restricted by the lower power density in application. Three carbonized derivatives of the same precursor metal organic framework (MOF) MIL-53(Fe) were prepared via carbonization at 385 ℃, 600 ℃ and 750 ℃ in argon atmosphere. Experiments showed that carbonized MIL-53(Fe) (CM53) derivative at 750 ℃ produced Fe 3 O 4 /Fe@C structure and revealed the best performance as bioanode in MFC. As anticipated, the MFC with CM53–750/Ti anode demonstrated superb maximum power density of 1179.08 mW/m 2 , which was 88.04% and 36.24% higher than that of MFC with CM53–385/Ti and CM53–600/Ti anode. Moreover, the charge transfer resistance of CM53–750/Ti (0.23 Ω) bioanode in MFC was 90.49% and 87.29% lower than that of CM53–385/Ti (2.42 Ω) and CM53–600/Ti (1.81 Ω) in MFC. The BCA method and high-throughput sequencing proved that CM53–750/Ti bioanode exhibited good biocompatibility and the function of screening the dominant bacteria for electricity generation. The results were mainly attributed to the synergistic effect of derived carbon, iron and Fe 3 O 4 nanoparticles (NPs). Fe 3 O 4 NPs and porous rod-like carbon promoted the enrichment and cultivation of microorganisms on the anode surface, while Fe NPs provided an efficient path for the transmission of extracellular electrons. This article proved that the carbonized derivatives of MOF have application potential in MFC.
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Frontiers in Chemistry
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2021
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IF 5.221
Fang Danruo,Jin Hansong,Huang Xiulin,Shi Yongxin,Liu Zeyu,Ben Suqin
Non-small cell lung cancer (NSCLC) is considered to be a principal cause of cancer death across the world, and nanomedicine has provided promising alternatives for the treatment of NSCLC in recent years. Photothermal therapy (PTT) and chemodynamic therapy (CDT) have represented novel therapeutic modalities for cancer treatment with excellent performance. The purpose of this research was to evaluate the effects of PPy@Fe3O4 nanoparticles (NPs) on inhibiting growth and metastasis of NSCLC by combination of PTT and CDT. In this study, we synthesized PPy@Fe3O4 NPs through a very facile electrostatic absorption method. And we detected reactive oxygen species production, cell apoptosis, migration and protein expression in different groups of A549 cells and established xenograft models to evaluate the effects of PPy@Fe3O4 NPs for inhibiting the growth of NSCLC. The results showed that the PPy@Fe3O4 NPs had negligible cytotoxicity and could efficiently inhibit the cell growth and metastasis of NSCLC in vitro. In addition, the PPy@Fe3O4 NPs decreased tumor volume and growth in vivo and endowed their excellent MRI capability of observing the location and size of tumor. To sum up, our study displayed that the PPy@Fe3O4 NPs had significant synergistic effects of PTT and CDT, and had good biocompatibility and safety in vivo and in vitro. The PPy@Fe3O4 NPs may be an effective drug platform for the treatment of NSCLC.
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CHEMOSPHERE
·
2021
·
IF 7.086
Zhihui Chen,Jun Yao,Bo Ma,Bang Liu,Jonghyok Kim,Hao Li,Xiaozhe Zhu,Chenchen Zhao,Meseret Amde
The presence of chlorophenols in water and wastewater is considered a serious environmental issue . To eliminate these micropollutants, biodegradation of chlorophenols using enzyme-nanoparticle conjugated biocatalyst, is proposed as an economical and eco-friendly method. Herein, amino-functionalized superparamagnetic Fe 3 O 4 @SiO 2 –NH 2 nanoparticles with core-shell structure were constructed as a promising carrier for immobilization of laccase from Trametes versicolor . Compared with free laccase, Fe 3 O 4 @SiO 2 –NH 2 -Laccase displayed remarkable outcomes in all major areas such as temperature and storage stabilities, and tolerance to organic solvents and metal ions . The biocatalytic performance and reusability of Fe 3 O 4 @SiO 2 –NH 2 -Laccase were evaluated for the degradation of 2,4-dichlorophenol (2,4-DCP) and 2,4,6-trichlorophenol (2,4,6-TCP) in repeated cycles. Even after 10 successive reuses, the degradation rate of 2,4-DCP and 2,4,6-TCP were found to be 54.9% and 68.7%, respectively. The influences of solution pH, initial chlorophenol concentration, and temperature on the degradation rate of these two chlorophenols were evaluated. The degradation intermediate products including dimers, trimers , and tetramers of 2,4-DCP and 2,4,6-TCP were identified. Release of chloride ions was observed during the enzymatic degradation of these two chlorophenols. Based on the determination of intermediate products and released chloride ions, the degradation pathway that was involved in dehydrogenation , reactive radical intermediates formation, dechlorination , self-coupling and oligomers/polymers formation was proposed. The toxicity of these two chlorophenols and their intermediates was substantially reduced during the enzymatic degradation. The results of this study might present an alternative clean biotechnology for the remediation of 2,4-DCP and 2,4,6-TCP contaminated water matrices.
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Frontiers in Medicine
·
2021
·
IF 5.093
Guo Liting,Zhang Hongming,Liu Ping,Mi Tianai,Ha Da,Su Li,Huang Lei,Shi Yan,Zhang Jun
Objective: The purpose of this study was to investigate the anticancer activity and the potential imaging use of the innovative combination of magnetic nanoparticles (MNPs)-Fe3O4, paclitaxel (PTX), and trastuzumab (Herceptin) in HER2-positive breast cancer.Methods: MNPs-Fe3O4 was synthesized and underwent water phase transfer and hydrophobic molecular loading, and its surface was then coupled with Herceptin mono-antibody. The morphological characteristics of MNPs-Fe3O4 were observed under transmission electron microscopy (TEM). Effects of PTX-Herceptin-MNPs-Fe3O4 on breast cancer cells were evaluated using the 3-(4,5-dimethylthiazol-2-yl)-2,4-diphenyltetrazolium bromide assay and the flow cytometric apoptosis assay. To establish a xenograft model, we injected breast cancer SK-BR-3 cells into the left thighs of nude mice. We measured the effect of PTX-Herceptin-MNPs-Fe3O4 on tumor growth by measuring tumor size and calculating inhibition rate with immunohistochemistry analysis further performed, and analyzed MNPs-Fe3O4 accumulation in tumor lesions using in vivo magnetic resonance imaging and in vivo fluorescence imaging.Results: Most MNPs were in spherical shape of about 10 nm in diameter observed under TEM. PTX-Herceptin-MNPs-Fe3O4 showed greater cytotoxic effects, and induced a higher apoptosis rate of SK-BR-3 cells than all the other groups, with corresponding changes of apoptosis-related proteins. Meanwhile, the in vivo tumor xenograft model showed that tumor inhibition rate in the PTX-Herceptin-MNPs-Fe3O4 group was higher than in the PTX-Herceptin group. Furthermore, PTX-Herceptin-MNPs-Fe3O4 enhanced the T2 imaging contrast enhancement effect on tumors in tumor-bearing mice.Conclusion: The novel PTX-Herceptin-MNPs-Fe3O4 combination may represent a promising alternative breast cancer treatment strategy and may facilitate tumor imaging.
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Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Yanhua Cui,Jian Zheng,Zengkai Wang,Binrong Li,Yongsheng Yan,Minjia Meng
How to endow the photocatalytic membrane with excellent efficiency and high permeability has always troubled scientific researchers. Herein, this work proposed an alternative strategy to controllably induce magnetic core-shell structured Fe 3 O 4 @TiO 2 nanoparticles to move towards the membrane surface under magnetic field, significantly maintaining a high-water flow rate and enhancing the photocatalytic degradation efficiency. The presence of Fe 3 O 4 in Fe 3 O 4 @TiO 2 facilitates the electron-hole separation efficiency and maintains the high redox ability of photogenerated electrons in TiO 2 . The characterization results indicated the Fe 3 O 4 @TiO 2 nanoparticles were successfully migrated to the membrane surface. As expected, the FTM(Y) had higher porosity (85.56%), higher pure water flux (1536.47 L m −2 h −1 bar −1 ) and better antifouling performance (5.24% of BSA static adsorption) than that of FTM(N) (1054.26 L m −2 h −1 bar −1 , 6.62%). Meanwhile, the FTM(Y) exhibited excellent photocatalytic and self-cleaning activity, the FTM(Y) showed 1.3 times enhancement in visible light (λ > 420 nm) driven photocatalytic degradation efficiency of tetracycline compared to that of the FTM(N) without magnetically induced. The ·O 2 - and·OH radicals and photogenerated h + played the primary role in photocatalytic degradation process. This work provides new insight into the design of highly efficient photocatalytic membrane to treat wastewater and enhance water purification .
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2021
·Vol. 413
·期 28
·6941-6949
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IF 4.157
Gu Chunchuan,Chen Xiang,Liu Hongying
In this report, portable, quantitative, and sequential monitoring of copper ions and pyrophosphate (PPi) with a single sensor based on a DNAzyme-Fe 3 O 4 system and glucometer readout was performed. Initially, streptavidin was functionalized on the surface of magnetic Fe 3 O 4 spheres through glutaraldehyde. Then, an invertase-modified DNA Cu substrate was connected to the magnetic Fe 3 O 4 spheres by a specific reaction between streptavidin and biotin. The sensing system was formed by a hybridization reaction between the Cu substrate and Cu enzyme. In the presence of Cu 2+ , Cu 2+ will recognize the Cu DNA substrate and form an “off-on” signal switch, thereby resulting in the separation of invertase from the Fe 3 O 4 nanospheres. PPi recognizes Cu 2+ to form a Cu 2+ -PPi complex, resulting in an “on-off” signal switch. Under optimized conditions, linear detection ranges for Cu 2+ and PPi of 0.01–5 and 0.5–10 μM, and detection limits for Cu 2+ and PPi of 10 nM and 500 nM, respectively, were obtained. Good selectivity was achieved for the analysis of Cu 2+ and PPi. Satisfactory results were achieved for this biosensor during the determination of Cu 2+ in real tap samples and PPi in human urine samples. This verified that the sensor is portable and low cost, and can be applied to the sequential monitoring of multiple analytes with a single point-of-care biosensor. Graphical abstract
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危险品化学品经营许可证（带存储）