APPLIED ORGANOMETALLIC CHEMISTRY
·
2018
·Vol. 33
·期 2
·e4708
·
IF 3.581
Mingliang Ma,Yuying Yang,Dili Liao,Ping Lyu,Jinwei Zhang,Jianli Liang,Lizhi Zhang
A strategy has been developed for the synthesis, characterization and catalysis of magnetic Fe 3 O 4 /P(GMA-EGDMA)-NH 2 /HPG-COOH-Pd core-shell structure supported catalyst. The P(GMA-EGDMA) polymer layer was coated on the surface of hollow magnetic Fe 3 O 4 microspheres through the effect of KH570. The core-shell magnetic Fe 3 O 4 /P(GMA-EGDMA) modified by -NH 2 could be grafted with HPG. Then, the hyperbranched glycidyl (HPG) with terminal -OH were modified by -COOH and adsorbed Pd nanoparticles. The hyperbranched polymer layer not only protected the Fe 3 O 4 magnetic core from acid–base substrate corrosion, but also provided a number of functional groups as binding sites for Pd nanoparticles. The prepared catalyst was characterized by UV–vis, TEM, SEM, FTIR, TGA, ICP-OES, BET, XRD, DLS and VSM. The catalytic tests showed that the magnetic Fe 3 O 4 /P(GMA-EGDMA)-NH 2 /HPG-COOH-Pd catalyst had excellent catalytic performance and retained 86% catalytic efficiency after 8 consecutive cycles.
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JOURNAL OF MOLECULAR LIQUIDS
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2019
·
IF 4.561
Qingmiao Wang,Lai Peng,Yuanyu Gong,Feifei Jia,Shaoxian Song,Yanmei Li
Because of the easy-separation, high specific surface areas and rich binding sites, magnetic MoS 2 with nanoscale architectures showed great potential in working as adsorbents for heavy metal ions . However, the general composites of nanoscale MoS 2 and Fe 3 O 4 suffered from the poor stability in acidic solution due to their entire exposures of Fe 3 O 4 to H + , which made it difficult to regenerate the used adsorbents by the general acid treatment. This work reported a facile approach to prepare Fe 3 O 4 @Polydopamine (PDA)-MoS 2 nanospheres via in-situ growth of MoS 2 on the PDA modified Fe 3 O 4 nanospheres. Fe 3 O 4 @PDA-MoS 2 nanospheres possessed a fast adsorption of 2.4076 g/mg·min (Initial concentration of Pb 2+ : 200 mg/L) and high adsorption capacity of 508.9 mg/g at 298 K to Pb 2+ . This was because the specific surface area of MoS 2 grown in-situ on Fe 3 O 4 @PDA was 7.6 times that of the pure MoS 2 , which significantly increased the binding sites of MoS 2 for heavy metal ions. In addition, the as-prepared nanocomposites exhibited not only easy-separation within 120 s by an external magnet, but also long-term stability in strong acid solutions as well as facile regeneration by general acid treatment. The tight PDA layers outside the Fe 3 O 4 nanospheres could work as not only a template for the formation of MoS 2 nanoflowers but also an efficient protective coating for the improvement of the stability of nanocomposites. The findings might open up the possibility of expanding the practical application of nanoadsorbent in environmental remediation.
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RSC Advances
·
2019
·Vol. 9
·期 33
·18874-18887
·
IF 3.049
Wei Cao,Xuandong Wang,Liang Song,Peiyuan Wang,Xuemei Hou,Huicong Zhang,Xiangdong Tian,Xiaolong Liu,Yun Zhang
Integrating multimodal bioimaging and different therapies into one nanoplatform is a promising strategy for biomedical applications, but remains a great challenge. Herein, we have synthesized a biocompatible folic acid (FA) functionalized gold nanorod@polypyrrole@Fe3O4 (GNR@PPy@Fe3O4-FA) nanocomposite through a facile method. The conjugated FA has endowed the nanocomposite with the ability to recognize targeted cancer cells. Importantly, the nanocomposite has been successfully utilized for magnetic resonance (MR), computed tomography (CT) and photoacoustic (PA) multimodal imaging. Moreover, the GNR@PPy@Fe3O4-DOX nanocomposite shows pH-responsive chemotherapy and enables the integration of photothermal therapy and chemotherapy to achieve superior antitumor efficacy. The GNR@PPy@Fe3O4-DOX nanocomposites have a drug release of 23.64%, and the photothermal efficiency of the GNR@PPy@Fe3O4 nanocomposites reaches 51.46%. Cell viability decreases to 15.83% and 16.47% because of the combination of chemo-photothermal therapy effects. Moreover, the GNR@PPy@Fe3O4-DOX-FA nanocomposite could target cancer cells via folic acid and under a magnetic field. The in vivo multimodal imaging and chemo-photothermal therapy effects showed that the GNR@PPy@Fe3O4-DOX-FA nanocomposites are a good contrast and theranostic agent. Thus, this multifunctional nanocomposite could be a promising theranostic platform for cancer diagnosis and therapy.
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PubMed
高影响因子
DALTON TRANSACTIONS
·
2018
·Vol. 47
·期 10
·3417-3424
·
IF 4.099
Huairu Tian,Jun Peng,Qiuzheng Du,Xuanhong Hui,Hua He
A novel, rapid and simple method is described for the synthesis of magnetic MIL-100(Fe) with novel Fe3O4 morphology, which significantly improved the sustainability of conventional fabrication processes in several aspects. The magnetic MOFs were prepared (i) in one pot (instead of multiple steps), (ii) at room temperature (instead of temperatures over 150 °C), (iii) within a few hours with excellent yield (instead of in few days with low productivity) and (iv) in the absence of any corrosive inorganic acid and organic reagent. The materials were tested in the industrially demanded photocatalytic and photo-Fenton degradation of sodium sulfadiazine. The degradation results indicated that the Fe3O4 nanorods could accelerate the catalytic efficiency. The catalyst would be of potential application due to its stable catalytic activity in repeated reaction cycles and no need for regeneration. Therefore, the MIL-100(Fe) and magnetic MIL-100(Fe) proposed in this study are ideal catalysts for the heterogeneous degradation of sodium sulfadiazine.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2018
·
IF 5.091
Dadao Wang,Jian Li,Zhifeng Xu,Yeran Zhu,Guoxin Chen
To improve the visible light utilization and adsorption capacity for combined pollutants (Tetracycline and Cu 2+ ), novel flower-like BiVO 4 /Bi 2 Ti 2 O 7 /Fe 3 O 4 composite has been successfully synthesized for the first time via a simple two-step process, surfactant-free hydrothermal route and solvothermal method . The crystal structures, chemical compositions , morphologies, optical and photocatalytic properties of the as-prepared samples were characterized by the techniques of XRD , XPS, SEM, HRTEM , BET, UV–vis DRS, and Photocurrent tests (PT). The synthetic sample with 4:1:20 (S5) mass ratio of BiVO 4 /Bi 2 Ti 2 O 7 /Fe 3 O 4 possessed the highest adsorption capacity and photocatalytic performance simultaneously in all of the as-prepared composites. Adsorption experiment (model 1 and model 2) suggested that there was not only competitive adsorption but also synergistic adsorption mechanisms between Cu 2+ and TC. Compared to pure BiVO 4 , and BiVO 4 /Bi 2 Ti 2 O 7 , BiVO 4 /Bi 2 Ti 2 O 7 /Fe 3 O 4 displayed more superior photodegradation efficiency with 97.22% removal of TC (10 mg/L) in 60 min, where the optimal conditions were catalyst dosage 1.00 g/L and initial pH at 6.0. In addition, radical trapping experiments revealed that the photo-induced active species superoxide radical ( O 2 − ) and holes (h + ) were the predominant active species in the photocatalytic system. These features demonstrate that the BiVO 4 /Bi 2 Ti 2 O 7 /Fe 3 O 4 has great application potential for combined pollutants’ removal from water.
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高影响因子
NEW JOURNAL OF CHEMISTRY
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2018
·Vol. 42
·期 7
·4981-4990
·
IF 3.201
Min Wang,Ke-yan Zheng,Shao-wu Lv,Hai-feng Zou,Hong-sen Liu,Gang-lin Yan,Ai-dong Liu,Xiao-fang Fei
Besides having many important physiological functions, cell membrane proteins have been recognized as major markers for many diseases in clinical examination. The discovery of new cell membrane proteins has attracted significant research interest. Herein, a multifunctional Fe3O4@SiO2/CdTe nanocomposite was designed for the detection and separation of cell membrane proteins, which was synthesized by a covalent coupling reaction between amino groups and carboxyl groups. It can serve as a universal tool for modifying antigens or other molecules that have amino groups. To verify the feasibility and practicability of this method, a folic acid (FA)-functionalized magnetic/fluorescent nanoprobe (Fe3O4@SiO2/CdTe-NH-FA) has been developed for recognizing and separating the FA receptor on HepG2 cells. FA was fixed to the shell of Fe3O4@SiO2/CdTe nanocomposites via 1,6-hexamethylenediamine. It obviously reduces the fluorescence quenching effect of FA on magnetic/fluorescent nanocomposites. The results demonstrate that the synthesized nanoprobe Fe3O4@SiO2/CdTe-NH-FA provides excellent optical characteristics for the reliable imaging of cancer cells and has good magnetic properties to enrich and isolate cell membrane proteins. Consequently, this biological nanoprobe can be used to find, obtain, and study unknown membrane proteins and predict the occurrence of some diseases. In addition, this nanoprobe will be a potential platform for accurate cancer diagnosis and therapy in the future.
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高影响因子
LANGMUIR
·
2018
·
IF 3.789
Guangfa Zhang,Qinghua Zhang,Tiantian Cheng,Xiaoli Zhan,Fengqiu Chen
High durability, low cost, and superior anti-icing and active deicing multifunctional surface coatings, especially in the extreme environment, are highly desired to inhibit and/or eliminate the detriment of icing in many fields, such as automobile, aerospace, and power transmission. Herein, we first report a facile and versatile strategy to prepare novel slippery polyols-infused porous surfaces (SPIPS’s) with the inexpensive polyols as the lubricant liquids. These SPIPS’s are fabricated by a spray-coating approach based on amino-modified magnetic Fe3O4 nanoparticles (MNP@NH2) and amphiphilic P(poly(ethylene glycol) methyl ether methacrylate-co-glycidyl methacrylate) copolymer covalent cross-linked hybrids, followed by infusion with various polyols. The as-prepared surface exhibits excellent antifrosting property, that is, it can greatly postpone frost formation as long as 2700 s at −18 °C. Meanwhile, differential scanning calorimetry results clearly demonstrate that SPIPS’s show a remarkable freezing point depression capacity and the crystallization point of water can be decreased as low as −36.8 °C. The SPIPS also displays an extremely low ice adhesion strength (0.1 kPa) due to its unique surface characteristics. Moreover, outstanding active thermal deicing property is achieved for these slippery surfaces because of intrinsically photothermal effect of magnetic Fe3O4 nanoparticle. Hence, these results indicate that this kind of multifunctional bioinspired slippery surface, with superb stability, good cost effectiveness, and easy fabrication, can be used as a promising candidate for anti-icing and deicing applications.
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高影响因子
Oncology Letters
·
2018
·Vol. 15
·期 5
·8079-8087
·
IF 1.664
Daren Liu,Xiaowen Li,Changlei Chen,Chao Li,Chuanbiao Zhou,Weidong Zhang,Jiangang Zhao,Jie Fan,Kai Cheng,Li Chen
Gastric cancer is the fourth most common malignancy globally. In order to decrease the dosage and side effects of conventional chemotherapy, and achieve improved benefits from molecular targeted therapy, novel drug delivery systems were developed in the present study. Oxaliplatin‑Au‑Fe3O4‑Herceptin® acts as a dual‑functional nanoparticles (NPs) conjugate and possesses the capability of human epithelial growth factor receptor 2 (HER2) targeting and oxaliplatin delivery. The 8‑20 nm Au‑Fe3O4 were synthesized by decomposing iron pentacarbonyl on the surfaces of Au NPs in the presence of oleic acid and oleylamine. Following being coated with polyethylene glycol, the NPs possessed a ζ‑potential of 13.8±1.6 mV and were demonstrated to exhibit no cytotoxicity when Fe concentration is <100 µg/ml via an MTS assay. Mass spectrometry analysis detected a peak at m/z 148,000, and Nuclear Magnetic Resonance indicated peaks at δ 3.51 (8.00H, s, 3‑H), 2.97‑3.02 (3.80H, t, 2‑H) and 2.72‑2.76 (3.72H, t, 1‑H) following successful loading with Herceptin and oxaliplatin probes. A drug release assay via dialysis cassettes demonstrated that 25% of the oxaliplatin was released at pH 8.0, however >58% was released at pH 6.0 following 4 h incubation, indicating its pH‑dependent release characteristic. The active targeting feature of oxaliplatin‑Au‑Fe3O4‑Herceptin was verified in a subcutaneous xenograft mouse model containing SGC‑7901 cells via detecting aggregated low intensity in T2‑weighted magnetic resonance imaging, which was further confirmed by immunohistochemistry. Therefore, oxaliplatin‑Au‑Fe3O4‑Herceptin is a promising multifunctional platform for simultaneous magnetic traceable and HER2 targeted chemotherapy for gastric cancer.
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高影响因子
Journal of Physical Chemistry C
·
2018
·
IF 4.484
Yue Zhang,Tiandong Zhang,Lizhu Liu,Qingguo Chi,Changhai Zhang,Qingguo Chen,Yang Cui,Xuan Wang,Qingquan Lei
High-performance energy storage materials are of essential importance in advanced electronics and pulsed power systems, and the polymer dielectrics have been considered as a promising energy storage material, because of its higher dielectric strength and more excellent flexibility compared with that of inorganic ceramic dielectrics. However, the energy storage capability of pristine polymer has been limited by its low intrinsic dielectric permittivity and ordinary ferroelectric performance. Herein, this work demonstrates a favorable method to achieve a sandwich-structured poly(vinylidene fluoride) (PVDF)-based composite by the electrospinning, solution casting, thermal quenching, and hot-pressing process. This innovative method combines with the 0.5Ba(Zr0.2Ti0.8)O3-0.5(Ba0.7Ca0.3)TiO3 nanofibers (BZT-BCT NFs), which possesses good ferroelectric hysteresis, and the hybrid particles of hexagonal boron nitride nanosheets (BNNSs) coated by ferroferric oxide (Fe3O4@BNNSs), which hold high breakdown strength (Eb). It is worth mentioning that the Fe3O4 particles disperse well on the surface of BNNSs to form the dipoles with the BNNSs at the interfacial region, resulting in an enhancement of the electric displacement and the dielectric permittivity of the composite. Furthermore, the influence of the volume fraction of filler particles on the electrical performance of composite was systematically investigated. Notably, the enhanced performance in terms of electric displacement (D), Eb, and discharged energy density (Ue) was achieved in the sandwiched BZT-BCT NFs-PVDF/Fe3O4@BNNSs-PVDF/BZT-BCT NFs-PVDF composite. The Ue of ∼8.9 J/cm3 was achieved at 350 kV/mm, which was 740% higher than the Ue of biaxially oriented polypropylene (BOPP, Ue ≈ 1.2 J/cm3 at 640 kV/mm). Of particular note is that the hybrids Fe3O4@BNNSs play a critical role to enhance the D and Eb and suppress the remnant displacement (Dr) of sandwiched composite. This contribution proposes an efficient and scalable method to prepare polymer-based dielectric composite for the demanded applications.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 20
·7770-7777
·
IF 3.069
Shi-Wen Lv,Jing-Min Liu,Chun-Yang Li,Hui Ma,Zhi-Hao Wang,Ning Zhao,Shuo Wang
A novel magnetic nanocomposite named Fe3O4@UiO-66-SO3H with a core–shell structure was first synthesized via a feasible step-by-step assembly strategy, and then employed as an adsorbent to remove methylene blue (MB) from aqueous solution. The characterization by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and Fourier transform infrared (FT-IR) spectroscopy proved that the Fe3O4@UiO-66-SO3H core–shell nanocomposite was successfully prepared. And the as-synthesized Fe3O4@UiO-66-SO3H had a strong affinity towards MB and the maximum adsorption capacity was 297.3 mg g−1. The adsorption of MB could be basically completed within 15 min. The kinetic and isotherm studies indicated that adsorption data could be well fitted to the pseudo-second-order model and Langmuir model. Significantly, Fe3O4@UiO-66-SO3H could selectively adsorb MB from a mixed solution due to the charge-selectivity effect and possessed good reusability. The electrostatic interaction and the π–π interaction were assumed to play a vital role in the adsorption process. All in all, the current study provided a promising sorbent for the efficient and selective removal of MB from dye-containing wastewater.
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Environmental Science-Nano
·
2017
·Vol. 5
·期 2
·487-496
·
IF 6.047
Changqing Zhu,Fuqiang Liu,Li Song,Hao Jiang,Aimin Li
Magnetic core–shell Fe3O4@polyanilines (Fe3O4@PANI) were controllably synthesized to harvest microwave (MW) energy for ultrafast Cr(VI) reduction. The nanocomposites are excellent MW acceptors due to the combination of the magnetic loss of Fe3O4 and dielectric loss of PANI. Under MW irradiation, abundant hot spots are generated on Fe3O4@PANI to accelerate the reduction of surface-bound Cr(VI). Moreover, Fe3O4@PANI is highly stable in an acidic solution and readily recoverable with an external magnet after use. The PANI shell possesses good enrichment ability for Cr(VI), creating a high Cr(VI) surface concentration which benefits the sequential reduction. Furthermore, an increase in the PANI coating amount from 24.78% to 55.15% increases the Cr(VI) adsorption capacity (qe) from 0.63 mmol g−1 to 1.68 mmol g−1, which linearly enhances the removal rate constant (k) of Cr(VI) under an MW field as k = 0.30qe − 0.03. The addition of oxalic acid as a sacrificial electron donor increases the Cr(VI) removal rate by 120.09% and protects the PANI shell from excessive oxidation by Cr(VI); this prolongs the lifetime of Fe3O4@PANI. In the presence of oxalic acid, the MW-driven Cr(VI) reduction on Fe3O4@PANI proceeds at a rate constant of 0.5773 min−1, which is much higher than that of palladium-based chemocatalysis. Moreover, Fe3O4@PANI can be in situ regenerated by MW and directly reused in the next cycle, and no efficiency loss occurs in 5 continuous runs. The mechanism study based on Cr species tracking and solid analyses indicates that a synergistic adsorption and reduction cycle proceed consecutively, contributing to the rapid Cr(VI) removal. This study demonstrates that Fe3O4@PANI is a promising alternative to utilize MW for ultrafast Cr(VI) reduction and has the advantages of time-saving and energy efficiency.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2017
·
IF 3.359
Junliang Wang,Yuanyang Lou,Xiaowei Zhuang,Shuang Song,Weiping Liu,Chao Xu
A magnetic core–shell Pr 6 O 11 /SiO 2 @Fe 3 O 4 catalyst using chemical precipitation was prepared. Its structure was confirmed by X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy, and energy-dispersive X-ray spectrum. The catalytic activity was evaluated by the catalytic ozonation of acetochlor. The results showed that the catalyst could effectively improve the acetochlor removal and mineralization. The total organic carbon removal reached 37.3% with the catalyst at 120 min, whereas the removal was 14.1% with ozonation alone. The catalyst was proved to be stable and recyclable by determining the concentration of the leaching praseodymium ions and the catalyst’s activity after repeated use. The effect of the radical scavengers indicated that the catalytic ozonation process followed an OH reaction mechanism. In addition, we employed Chlorella and zebrafish as model organisms to investigate the aquatic toxicity of the treated solution and the dissolved praseodymium ions. We found that the aquatic toxicity of the reaction solution decreased with an increase in the degradation time, and no obvious toxicity was found for the dissolved praseodymium ions.
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危险品化学品经营许可证（带存储）