WATER AIR AND SOIL POLLUTION
·
2023
·Vol. 234
·期 11
·1-12
·
IF 2.9
Wang Xilin,Sun Xiaojing,Dai Ping,Xu Dongyan
This study focuses on preparation of a novel Fe 3 O 4 @C/RM composite by carbothermal reduction of red mud (RM) with scrap tire-derived carbon black and its application for the degradation of orange II in water by activating PMS. X-ray diffraction (XRD) measurements revealed that hematite (Fe 2 O 3 ) was reduced to Fe 3 O 4 in the pyrolysis process above 600 o C. The reduction pathway of Fe 2 O 3 was inferred by detecting the gas emissions during carbothermal reduction. Morphology analysis indicates that Fe 3 O 4 nanoparticles were encapsulated in a carbon matrix, forming a composite with the residual components of RM. The as-prepared Fe 3 O 4 @C/RM composite exhibited high performance toward orange II degradation with 95.9% removal of orange II within 90 min. Electron paramagnetic resonance (EPR) and quenching tests were applied to illustrate the activation processes of peroxymonosulfate. Both radical and non-radical oxygen species are responsible for the efficient degradation of orange II in the Fe 3 O 4 @C/RM/PMS system.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Jingtao Bi,Xin Huang,Jingkang Wang,Ting Wang,Hao Wu,Jinyue Yang,Haijiao Lu,Hongxun Hao
In this work, to simultaneously remove organic dyes and Pb(II) from wastewater, a series of magnetic Fe 3 O 4 @C@TiO 2 -nanotube composites were designed and successfully synthesized via a new facile oil-phase cyclic magnetic adsorption (OCMA) method. The structural properties of the synthesized composites were investigated by different characterization methods systematically. It was found that Fe 3 O 4 was uniformly deposited on the inner walls of TiO 2 nanotubes. Although a Type III band alignment was formed in the catalysts, Fe 3 O 4 @C@TiO 2 -nanotube composites exhibited enhanced light absorbing ability and enlarged absorption edge due to efficient separation of h + and e − , which was verified by UV–Vis (Ultraviolet–visible) and PL (Photoluminescence) spectra. Decontamination experiments of 1FeCTi showed that more than 98% of RhB and about 92% of Pb(II) ions could be removed through adsorptive removal in the dark equilibrium period and further elimination during the illuminating period. The pseudo-first-order model, L-H model and adsorption-reaction model were established to describe the adsorption of Pb(II) in the dark, photodegradation of RhB and further elimination of Pb(II), respectively. A four-step mechanism was proposed to describe the decontamination process of Pb(II) during the illuminating period according to the final forms of Pb (Pb δ1 , Pb δ2 , Pb 0 and PbO). Finally, it was found that the photocatalytic activity would be maintained in the recycle experiments due to the existence of 1FeCTi@PbO heterostructure.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2011
·
IF 4.524
Maiyong Zhu,Guowang Diao
An efficient magnetic carbon nanocomposite supported Pd nanoparticle catalyst has been prepared by a three-step process in this report. The morphology, inner structure, and magnetic properties of all products were studied with transmission electron microscopy, X-ray powder diffraction, Fourier translation infrared spectroscopy, X-ray photoelectron spectroscopy, and vibrating sample magnetometer. The Suzuki and Heck coupling reactions were used to demonstrate the catalytic efficiency of the as-prepared Pd/Fe3O4@C (Pd/MFC) nanocomposite catalyst. The results showed that the catalyst is completely recoverable with the simple application of an external magnetic field and the catalytic efficiency shows no obvious loss for Suzuki and Heck coupling reactions even after five repeated cycles.
研究领域:
材料科学
·
催化化学
·
纳米技术
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2016
·
IF 2.76
Xuanxuan Qiao,Aihua Sun,Chongyang Wang,Chengyi Chu,Si Ma,Xiaobing Tang,Jianjun Guo,Gaojie Xu
Highly dispersed hollow Fe 3 O 4 @C nanoparticles with controllable particle sizes were prepared. Hollow Fe 3 O 4 @C nanoparticles were chosen not only because of their low density and high optical contrast, but also because of high refractive index, better optical properties. Corresponding colloidal suspension of hollow Fe 3 O 4 @C photonic crystals in propylene carbonate showed a highly adjustable structure color change upon applying of electric fields. After being stored for 28 days in propylene carbonate solution, these colloidal suspensions can still diffract visible lights when an electric field was applied, which is attributed to low density. Based on the dielectric spectroscopy analysis of hollow Fe 3 O 4 @C and SiO 2 @Fe 3 O 4 @C colloidal suspensions,a dielectric loss model has been proposed to explain the effect of surface properties on the assembly.
研究领域:
材料科学
·
纳米技术
·
光学
·
胶体科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Kai Sun,Xuechun Yang,Yuan Yuan,Jinjiu Qi,Boyang Liu,Andrey Karlovich Sarychev,Runhua Fan
Microwave absorbers have been developed to counter electromagnetic pollution, and enhancing their performance remains an ongoing concern. In this paper, carbon-coated Fe 3 O 4 and polypyrrole (PPy) were combined to construct composites with a core-double-shell structure, and the influences of multiple synergistic effects from ternary components, carbon defects, and microstructure on the electromagnetic properties of Fe 3 O 4 @C@PPy composites were investigated. The Fe 3 O 4 @C@PPy composites were successfully prepared by the low-temperature self-propagation method and in-situ oxidation polymerization process, achieving a −53.67 dB reflection loss at 12.24 GHz when the sample thickness was 2.13 mm, and the effective absorbing (RL < 10 dB) band covered 4.16 GHz (13.84–18 GHz) with a corresponding thickness of only 1.63 mm. The core-double-shell structure perfectly integrated various advantages of each component as well as provided multiple reflections and scatterings. Meanwhile, the polarization loss was notably enhanced by heterogeneous interfaces, and the dielectric-magnetic loss mechanism cooperatively accelerated the dissipation of electromagnetic wave energy.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2020
·
IF 5.88
Xuan Liu,Chen Wang,Xueyan Wang,Chen Tian,Yuhua Shen,Manzhou Zhu
Designing a proper intelligent platform to target cancer cells accurately and reducing its toxic side effects on normal tissues remain a challenge in medicine application. Herein, a novel dual-targeted and tumor microenvironment-triggered Fe 3 O 4 @carbon(C)/ZnO-doxorubicin (DOX) -folic acid (FA) drug delivery system with porous structure was designed and fabricated for the first time. The co-presence of Fe 3 O 4 core and FA molecules functioned successfully could successfully realize the magnetic targeting and cancer cell-specific targeting. In addition, pH-responsive ZnO and porous carbon both derived directly from zinc-2-methylimidazolate complex (Zn-ZIF) could play the roles of “gatekeeper” and photothermal agent, respectively. The former could efficiently block the drug within mesoporous in blood environment for decreasing the damage to the normal tissues and achieving the controlled DOX release in the simulated and real acidic tumor microenvironment. And the latter could exhibit the intrinsic photothermal conversion efficiency upon 638 nm laser irradiation. Therefore, the Fe 3 O 4 @C/ZnO-DOX-FA nanoplatform integrated dual targeting, controlled chemotherapy with photothermal therapy (PTT) for cancer, displaying a significantly superior synergistic anticancer efficiency both in vitro and in vivo experiments to either monotherapy. Above results suggested the prepared nanoplatforms might be a promising candidate for effectively synergetic therapeutics to cancers.
研究领域:
生物医学工程
·
纳米医学
·
肿瘤学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Analytical Methods
·
2024
·
IF 2.7
Shouhui Chen,Dan Zhou,Qinghao Xiong,Yinan Yang,Mingyang Zhang,Shoulin Chen
Nowadays, many people are turning to medications that can help them stay calm during surgeries and their daily lives. As an anesthetic that reduces the excitability of nerve cells, propofol can achieve sedative with the advantages of fast onset and short half-life. The development of propofol sensors has tremendous application potential because they can help healthcare professionals dynamically regulate the concentration of propofol in the blood, not only to achieve painless surgeries that patients want, to maintain the sedation that surgeons desire, but also to prevent the respiratory failure that may occur during the patient's daily sleep aids. In this paper, we prepared Fe3O4/C/CB nanocomposites by doping carbon black on the surface of the pyrolyzed product of MIL-88B. The nanocomposites-modified glassy carbon electrodes were used to detect propofol in phosphate buffer solution. The porous nanocomposites with high electrical conductivity promoted the charge transfer on the electrode surface, improving the performance of the modified electrodes. After optimization, the linear range, the detection limit, and the sensitivity for propofol were 5.0~205 μM, 0.102 μM, and 2.850 μA cm-2 μM-1, respectively. The electrochemical sensing of propofol in medical propofol emulsion injection and normal human serum showed that the method was rapid and repeatable.
研究领域:
分析化学
·
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Yuan Zhuang,Siyi Yuan,Jiemin Liu,Yan Zhang,Hao Du,Chuandong Wu,Peng Zhao,Haiying Chen,Yipu Pei
Volatile organic compound (VOC) emissions are a global environmental concern because of their potential health risks. The removal of refractory VOCs calls for advanced technologies with powerful oxidative ability and high mass transfer efficiency. In this study, a yolk-shell Fe 3 O 4 @C/Fenton system was designed to improve octane removal efficiency. The octane removal efficiency at equilibrium was increased by 24.7% relative to that of the Fe 3 O 4 /Fenton system, and the main intermediate or byproduct levels decreased by 89.4%. The yolk-shell Fe 3 O 4 @C displayed higher catalytic and mass transfer efficiencies for octane degradation than Fe 3 O 4 . A synergistic effect of mass transfer enhancement and catalytic oxidation was observed in the yolk-shell Fe 3 O 4 @C/Fenton system. The mechanism of the synergistic effect of mass transfer and octane degradation, a regional reaction theory for the yolk-shell structure, and octane removal pathways were proposed and supported by the octane removal results and byproducts detection and measurement. This yolk-shell Fe 3 O 4 @C/Fenton system provides an effective and advanced way to treat refractory and hydrophobic VOCs, and its preparation can be extended to other high-efficiency core-shell structure catalyst-carbon materials.
研究领域:
环境科学
·
化学工程
·
材料科学
·
催化
·
污染控制
✓ 已验证
DOI
高影响因子
Nanoscale
·
2017
·Vol. 9
·期 13
·4508-4515
·
IF 7.367
Na Lu,Min Zhang,Lei Ding,Jing Zheng,Caixia Zeng,Yanli Wen,Gang Liu,Ali Aldalbahi,Jiye Shi,Shiping Song,Xiaolei Zuo,Lihua Wang
Herein, we have developed a simple and facile method to synthesize yolk–shell nanostructured Fe3O4@C nanoparticles (NPs) as a multifunctional biosensing platform for the label-free colorimetric detection of H2O2 and glucose. It was demonstrated that Fe3O4@C yolk–shell nanostructures (YSNs) retained the magnetic properties that can be used for separation and concentration. Also importantly, the Fe3O4@C YSNs exhibited an intrinsic peroxidase-like activity that could quickly catalyze the enzyme substrate in the presence of H2O2 and produce a blue color. Compared to other similar ferric oxide-based NPs with different structures, Fe3O4@C YSNs exhibited greatly enhanced catalytic activities due to their unique structural features. Moreover, steady-state kinetics indicated the catalytic behaviors in agreement with the classic Michaelis–Menten models. Taking advantage of the high catalytic activity, Fe3O4@C YSNs were employed as novel peroxidase mimetics for label-free, rapid, sensitive, and specific colorimetric sensing of H2O2 and glucose, suggesting that Fe3O4@C YSNs have the potential for construction of portable sensors in the application of point-of-care (POC) diagnosis and on-site tests.
研究领域:
纳米技术
·
生物化学
·
分析化学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Rongcong Li,Liu Yang,Ruizhi Li,Yingke Zhou
Carbon modified nitrogen-doped Fe 3 O 4 (N–Fe 3 O 4 @C) nanorod array directly grown on carbon cloth was fabricated. Nitrogen-doping and carbon shell effectively decrease the potential barrier of ion migration of the oxides and improve the electrochemical performance. An enhanced donor density of N-Fe 2 O 3 (7.6 × 10 15 cm −3 ) is achieved with optimized doping temperature. Following with carbon coated, the optimized N–Fe 3 O 4 @C electrode showed ultrahigh capacitance over an extended potential window and remarkable cycling performance. A new quasi-solid-state supercapacitor with N–Fe 3 O 4 @C and NiCoP@Ni(OH) 2 achieved high voltage to 2.0 V and high energy density (72.37 Wh kg −1 , 2.36 mWh cm −3 ).
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2020
·Vol. 8
·期 37
·8671-8683
·
IF 5.344
Zhen Xiang,Yiyao Qi,Yusheng Lu,Zhenrong Hu,Xiao Wang,Wenwen Jia,Jingzhou Hu,Jiansong Ji,Wei Lu
Multifunctional nanomedical platforms have broad prospects in imaging-guided combination therapy in cancer precision medicine. In this work, metal–organic framework (MOF)-derived novel porous Fe3O4@C nanocomposites were developed as an intelligent cancer nanomedical platform for combined cancer therapy with MRI-guided magnetic-triggered hyperthermia and chemotherapy functions. The magnetic behavior, porous character and good surface modification endowed this smart nanoplatform with favorable biocompatibility, high-efficiency MRI imaging, magnetic-triggered on-demand DOX release function, and synergistic therapy of magnetic hyperthermia and chemotherapy, which proposed an all-in-one platform for cancer therapy. Additionally, in vivo animal experiments verified the significant suppression of malignant tumor growth with negligible side effects, which were attributed to the consecutive 13 day synergistic therapy of magnetic hyperthermia and chemotherapy in one. To be specific, Fe3O4@C-PVP@DOX significantly decreases the volume (2.5 to 0.44 of tumor volume ratio) and weight (0.49 g to 0.10 g) of tumors after magnetic-triggered hyperthermia and chemotherapy treatments. Moreover, no big difference of body weight and associated damage was observed among all major organs. Therefore, owing to its high-efficiency combined therapy of magnetic-triggered hyperthermia and chemotherapy, this smart nanoplatform holds great potential application in the precise treatments of clinical cancer.
研究领域:
纳米医学
·
癌症治疗
·
材料科学
·
生物医学工程
·
磁共振成像
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2019
·
IF 3.218
Zhi-Chao Xiao,Yan Li,Cheng-Lu Liang,Yang Liu,Rui-Ying Bao,Ming-Bo Yang,Wei Yang
For lithium ion batteries (LIBs), a high cell capacity, which requires both a high capacity and a high loading mass of active materials, is crucial for practical application. However, how to fabricate efficient anodes with high cell capacity and high areal capacity remains a challenge. To solve this issue, we design a structure of porous building block composed of multi-functional carbon integrated rGO-Fe 3 O 4 @C composites. The carbon shell of Fe 3 O 4 @C derived from polydopamine (PDA) acts as an artificial solid electrolyte interface (SEI) film to avoid the excessive SEI formation, within which there are sufficient lithium ion diffusion pathways derived from the spaces between Fe 3 O 4 nanocrystals. The carbon derived from the in-situ polymerized polyacrylamide and rGO act as a glue to integrate the as-obtained Fe 3 O 4 @C composites to form the porous building blocks. Due to the compact stacking of building blocks, the composite electrode achieves a high active material loading mass of 5.94 mg (5.25 mg cm −2 ), while maintains a satisfying capacity (685 mAh g −1 after the 100th cycle at 0.5 A g −1 ) and good rate performance (440 mAh g −1 at 3 C). Therefore, a high cell capacity (4.02 mAh) and a high areal capacity (3.6 mAh cm −2 ) at 2.62 mA cm −2 in a single CR2032 coin cell are achieved.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）