JOURNAL OF HAZARDOUS MATERIALS
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2021
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IF 10.588
Xiao Zhang,Bin Ren,Xi Li,Biming Liu,Shiwen Wang,Peng Yu,Yanhua Xu,Guoqiang Jiang
Carbon-bridge-modified malonamide (MLD)/g-C 3 N 4 (CN) was prepared by copolymerization of MLD with urea and melamine and loaded with Fe 3 O 4 for the high-efficiency removal of tetracycline (TC) in water under photo-Fenton. The prepared catalysts were characterized by SEM, TEM , N 2 adsorption–desorption analysis, XPS, XRD, and FTIR, which proved that the modification method successfully introduced the C bridge into the carbon nitride molecular system and increased the structural defects of the catalyst. The Carbon-bridge-modified MLD/CN/Fe 3 O 4 also had good visible-light response and charge-separation and transport abilities in the photoelectrochemical test. Degradation results showed that the photo-Fenton degradation of TC reached 95.8%, and the mineralization rate was 55.7% within 80 min at 80 mM H 2 O 2 dosage, 0.5 g/L catalyst dosage, and near-neutral pH by 0.8MLD/CN/Fe 3 O 4 . Moreover, the oxidation products and mineralization pathways of TC were explored by LC-MS. Toxicity analysis indicated low environmental threat of the intermediates in TC mineralization. EPR analysis and H 2 O 2 decomposition efficiency analyses showed an improvement in the H 2 O 2 decomposition performance of 0.8MLD/CN/Fe 3 O 4 . This work could provide a valuable insight for the application of heterogeneous photo-Fenton technology in wastewater treatment .
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Journal of Nanomaterials
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2021
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IF 2.986
Hongliu Jiang,Yao Cao,Fengtao Zeng,Zewu Xie,Fuan He
In this paper, a magnetic graphene oxide (MGO) composite was prepared by the click reaction between the alkyne-modified Fe3O4 nanoparticles and the azide-modified graphene oxide for the purpose of removing the Congo red (CR) dye from water. The deposition of the Fe3O4 nanoparticles on the graphene oxide to successfully prepare the MGO composite was evidenced by the Fourier-transform infrared spectrometer, wide-angle X-ray diffraction equipment, scanning electron microscope, thermal gravimetric analyzer, and Raman spectrometer. The value of saturation magnetization for the MGO composite was 34.9 emu/g. The CR absorption capacities of the MGO composite increased first and then decreased as the pH value increased. It was found that the maximum adsorption capacity of the MGO composite for the CR was as high as 769.2 mg/g. In the absorption-desorption experiment, the CR absorption capacities of the MGO composite from the second cycle to the fifth cycle remained stable to be about 130 mg/g. Moreover, both the Langmuir model for the adsorption isotherm and the pseudo-second-order kinetic model could be used to describe the CR absorption behaviors of the MGO composite.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2021
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IF 7.312
Zhi-Heng Lu,Ibrahim Abdelhai Senosy,Dong-Dong Zhou,Zhong-Hua Yang,Hao-Ming Guo,Xiao Liu
In this work, a novel Fe 3 O 4 @ZnAl-LDH@MIL-53(Al) composite was synthesized by a facile three-step process and utilized as an adsorbent for the removal of azole fungicides from environmental water. The characterization results revealed that double hydroxide (ZnAl-LDH) and metal organic framework (MIL-53) have been successfully tethered to the shell of Fe 3 O 4 . The main factors affecting the removal efficiencies were investigated, and results revealed that Fe 3 O 4 @ZnAl-LDH@MIL-53(Al) composite possessed high removal efficiencies for azole fungicides. Furthermore, the adsorption mechanism was investigated and including hydrogen-bonding interaction, chemisorption and π–π interaction. The adsorption kinetic was more consistent with the pseudo-second-order kinetic model, and the whole adsorption process could reach the equilibrium within 5 min. Langmuir adsorption isotherm model could describe the adsorption process most accurately, and the maximum adsorption values of azole fungicides were in the range of 43.54–71.79 mg g −1 . Meanwhile, the adsorption thermodynamics indicated that the adsorption process was exothermic and spontaneous. Hence, Fe 3 O 4 @ZnAl-LDH@MIL-53(Al) composite had a great application potential in the removal of azole fungicides from the environment.
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Applied Materials Today
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2020
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IF 8.352
Xueqin Wang,Tiandi Xiong,Miao Cui,Xinglei Guan,Jiacheng Yuan,Zichao Wang,Ruifang Li,Huiru Zhang,Shaofeng Duan,Fang Wei
Catalytic nanozyme-based tumor therapy is currently considered as a promising strategy in anti-tumor treatment, but it also has some disadvantages such as systemic toxicity, off-target, and non-specificity, leading to lowered therapeutic precision and efficacy in clinical curability. To overcome these limitations, herein we report a distinct strategy of nanocatalytic tumor precision therapy via tumor cell-specific CD44 targeted nanozyme-catalyzed cascade reactions. Briefly, the composite nanozyme CD44 MMSN/AuNPs were assembled with two self-activable nanocatalysts including the inner core peroxidase-mimic Fe 3 O 4 magnetic nanoparticles (MNPs), and the outer glucose oxidase-mimic AuNPs situated within large aperture mesoporous silicon (MMSN/AuNPs), and then functionalized with cell ligand hyaluronic acid (HA), which can specifically target transmembrane CD44 receptor of HepG2 tumor cells. In terms of catalysis, we found the coupled AuNPs effectively catalyzed glucose to produce H 2 O 2 , which was inversely catalyzed by Fe 3 O 4 NPs and AuNPs to produce more hydroxyl radicals (•OH) in tumor microenvironment (TME). That is, this composite nanozyme performed self-activable reactive oxygen species (ROS)-mediated cascade reactions, and thereby resulted in significantly specific growth inhibition of hepatocellular carcinoma HepG2 cells. The present results also showed that the composite nanozyme CD44 MMSN/AuNPs could specifically induce a greater number of HepG2 cell apoptosis and death. More importantly, we elucidated the mechanism of the composite nanozyme CD44 MMSN/AuNPs via inducing HepG2 cell apoptosis and death from subcellular level. Therefore, this study represents an insightful paradigm for achieving nanocatalytic tumor precision therapy through rationally designing tumor cell-targeting inorganic nanozyme with self-activable cascade reactions.
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JOURNAL OF INORGANIC BIOCHEMISTRY
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2020
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IF 3.212
Han-Long Cheng,Hai-Ling Guo,An-Jian Xie,Yu-Hua Shen,Man-Zhou Zhu
At present, cancer has become a major disease threatening human health worldwide. Therefore, developing targeting guided multimode synergetic therapy has become one of the hot spots in current antitumor research and is also a great challenge. Herein, a new Fe 3 O 4 /g-C 3 N 4 @PPy-DOX nanocomposite containing magnetic iron oxide (Fe 3 O 4 ) nanoparticles (NPs), lamellar structure of graphite-like carbon nitride (g-C 3 N 4 ) and polypyrrole (PPy) shell with the loaded anti-tumor drug doxorubicin hydrochloride (DOX) was designed and prepared. The monodisperse Fe 3 O 4 nanoparticles (NPs) with the diameter of 20 nm endowed the nanocomposite with the magnetic targeting ability, reducing damage to normal tissues. It is very interesting that the Fe 3 O 4 NPs also possessed photosensitizer function for photodynamic therapy (PDT). The g-C 3 N 4 sheets as the photocatalysis towards the degradation of water for generating O 2 could effectively improve the hypoxia of solid tumors and increase the efficiency of PDT. In addition, PPy has high light-to-heat conversion efficiency, so was chosen for the cancer photothermal therapy (PTT). Finally, an anticancer drug (DOX) was loaded on the nanocomposite because the presence of mesoporous structure. Thus, the prepared Fe 3 O 4 /g-C 3 N 4 @PPy-DOX nanocomposites exhibit synergetic chemotherapy/PTT/enhanced PDT antitumor effect. This study provides an inspiration for combining targeting and multimodality to improve the anticancer efficiency.
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JOURNAL OF CHROMATOGRAPHY A
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2021
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IF 4.759
Lu Wang,Guoning Chen,Hua Shu,Xia Cui,Zhimin Luo,Chun Chang,Aiguo Zeng,Jia Zhang,Qiang Fu
As a typical steroid hormone drug, estradiol (E2) is also one of the most frequently detected endocrine disrupting chemicals (EDCs) in the aquatic environment. Herein, in response to the potential risk of E2 in steroid hormone pharmaceutical industry wastewater to human and wildlife, a novel carbon nanotubes / amine-functionalized Fe 3 O 4 (CNTs/MNPs@NH 2 ) nanocomposites with magnetic responsive have been developed for the enrichment and extraction of E2 in pharmaceutical industry wastewater, where amino-functionalized Fe 3 O 4 magnetic nanoparticles (MNPs@NH 2 ) were used as a magnetic source. The resultant CNTs/MNPs@NH 2 possessed both the features of CNTs and desired magnetic property, enabling to rapidly recognize and separate E2 from pharmaceutical industry wastewater. Meanwhile, the CNTs/MNPs@NH 2 had good binding behavior toward E2 with fast binding kinetics and high adsorption capacity, as well as exhibited satisfactory selectivity to steroidal estrogen compounds. Furthermore, the change of pH value of aqueous phase in adsorption solvent hardly affected the adsorption of E2 by CNTs/MNPs@NH 2 , and the adsorption capacity of E2 ranged from 19.9 to 17.2 mg g − 1 in the pH range of 3.0 to 11.0, which is a latent advantage of the follow-up development method to detect E2 in pharmaceutical industry wastewater. As a result, the CNTs/MNPs@NH 2 serving as a solid phase extraction medium were successfully applied to efficiently extract E2 from pharmaceutical industry wastewater. Therefore, the CNTs/MNPs@NH 2 nanocomposites could be used as a potential adsorbent for removing steroidal estrogens from water. More importantly, the developed method would provide a promising solution for the monitoring and analysis of EDCs in pharmaceutical industry wastewater.
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CONSTRUCTION AND BUILDING MATERIALS
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2020
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IF 4.419
Ying Li,Jiangying Yu,Zhilong Cao,Wei Du,Yichi Zhang,Yang Zou
In this paper, a novel electromagnetic controlled rupture microcapsule (ECRM) with ultrahigh self-healing capability was prepared by melt condensation method, whose shell was constructed by nano-Fe 3 O 4 and paraffin, and whose core was toluene-di-isocyanate (TDI). Effect of paraffin/TDI mass ratio on core fraction of ECRM was investigated. The morphology, particle size distribution and component identification of ECRM were characterized by cold field emission scanning electron microscope (CFE-SEM), laser particle analyzer and Fourier transform infrared spectrometer (FTIR), respectively. Subsequently, the effects of ECRM on mechanical propertyand self-healing ability of mortars were evaluated. The results showed that the paraffin/TDI mass ratio delivered a major impact on core fraction of ECRM. The core fraction of ECRM was 65.3% when the mass ratio of paraffin/TDI was 1:2. The particle size distribution of ECRM mainly ranged from 60 μm to 1258 μm with 600 rpm agitation rate . The ECRM exhibited ellipsoidal with a rough surface. FTIR confirmed the successfully encapsulation of TDI in the shell of paraffin and nano-Fe 3 O 4 . In addition, ECRM containing 10 wt% nano-Fe 3 O 4 can be heated to higher than 60 ℃ under electromagnetic field (output voltage: 600 V, field frequency: 124 kHz) for 500 s. Compared to the control mortar, the compressive strength and the flexural strength of mortar showed positive correlation with the ECRM dosage increasing (0 to 4 wt%). The reserved ratio of compressive strength of damaged mortar containing 6% ECRM with 60% compressive strength preload was 91.4% after self-healing for 30 min under electromagnetic field and curing for 24 h at room temperature. This work is anticipated to afford new insights for solving rupture problems of microcapsules in self-healing cementitious materials .
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2020
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IF 3.99
Xin-Yue Wang,Jie Yang,Ling Zhou,Gao Song,Fan Lu,Li-Jun You,Ju-Mei Li
It is greatly significant to sense hexavalent chromium (Cr (VI)) in water because Cr (VI) is one of the most toxic heavy metals and is extremely harmful for human health and environment. In this study, we explored sensitive surface-enhanced Raman scattering (SERS) substrates for rapid detection of Cr (VI) using magnetic Fe 3 O 4 /ZrO 2 /Ag composite microspheres. We firstly coated uniform zirconium dioxide layer around Fe 3 O 4 cores to achieve Fe 3 O 4 /ZrO 2 microspheres and then deposited silver nanoparticles onto their surface via controlled reduction of AgNO 3 by n-butylamine. The SERS sensitivity of Fe 3 O 4 /ZrO 2 /Ag composite microspheres were easily tailored via facilely changing the concentration of AgNO 3 to tune the coverage of silver nanoparticles on the Fe 3 O 4 /ZrO 2 /Ag. We used 4-mercaptobenzoic acid (4-MBA) as a Raman molecule to evaluate the SERS activity of Fe 3 O 4 /ZrO 2 /Ag. They illustrated excellent SERS property as well as magnetic responsibility. The optimized Fe 3 O 4 /ZrO 2 /Ag were employed to quantitatively detect Cr (VI) in aqueous solution. The results showed good linear relationship between SERS intensities and logarithm concentrations of Cr (VI) (R 2 = 0.98) with a detection limit of low down to 10 −7 M, which is much lower than the safety value (1 μM) in drinking water of United States Environmental Protection Agency. Moreover, the highly uniform and robust Fe 3 O 4 /ZrO 2 /Ag composite microspheres display outstanding signal reproducibility (RSD = 8.34 %) and good storage stability. These results indicate that the prepared Fe 3 O 4 /ZrO 2 /Ag composite microspheres have promising application prospect for SERS analysis of environmental pollutants.
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JOURNAL OF MEMBRANE SCIENCE
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2020
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IF 7.183
Jiayun Zhu,Shouyong Zhou,Meisheng Li,Ailian Xue,Yijiang Zhao,Wenbo Peng,Weihong Xing
A novel PVDF mixed matrix ultrafiltration membrane was prepared by blending PVDF with the deformed rebar-like Fe 3 O 4 –palygorskite nanocomposites (MPGS) using the chemical coprecipitation method. Fe 3 O 4 nanoparticles were anchored on the surface of the palygorskite nanofibers to form deformed rebar-like structures. MPGS were then distributed uniformly on the membrane matrix. PVDF chains firmly wrapped by the deformed rebar-like nanocomposites consequently enhanced the tensile strength of the PVDF membrane. At 7.0 wt % MPGS, the tensile strength increased from 1.59 MPa to 2.66 MPa. The overall thickness, skin layer thickness, finger-like voids, average pore size and surface roughness of membranes decreased with increasing amounts of MPGS. The rejection of the membrane increased to 99.09% at 7.0 wt % MPGS. The contact angle of membranes decreased from 99.14° (pure PVDF) to 78.76° (PVDF/7.0 wt % MPGS). On the other hand, the pure water flux of membranes increased from 123.57 L m −2 h −1 (pure PVDF) to 356.16 L m −2 h −1 (PVDF/7.0 wt % MPGS). The flux recovery rate of the mixed matrix membranes (PVDF/7.0 wt % MPGS) was as high as 80%. This was more than twice that of the pure PVDF membrane (31.6%). These results demonstrated that the deformed rebar-like structure of the MPGS played a critical role in determining the structures and properties of PVDF mixed matrix ultrafiltration membranes. The hydrophilicity, thermal stability, permeation flux and antifouling property of the mixed matrix membranes increased with addition of MPGS. As such, PVDF/MPGS membranes had excellent comprehensive properties thus making them ideal for application in numerous fields.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2020
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IF 3.232
Guangxian Liu,Hongying Liu,Hanxiao Xu,Langlang Zhu,Chang Su,Chunchuan Gu,Lihua Li
In this paper, the composites of Fe 3 O 4 modified by sodium lignosulfonate and copper peroxide (Fe 3 O 4 @CP) were produced by a simple two-step method, and their morphology and composition were featured in Field emission scanning electron microscopy , X-ray powder diffraction, X-ray diffraction and Fourier transform infrared. Then, Fe 3 O 4 @CP catalyzed the oxidation of colorless 3,3′,5,5′-tetramethylbenzidine to blue oxide in the presence of H 2 O 2 , indicating that it had good catalytic performance. Further, the experimental conditions were optimized, including time, pH, temperature and material concentration. The kinetic analysis results showed that Fe 3 O 4 @CP exhibited excellent catalytic performance and its catalytic kinetic plot conformed to the Michaelis-Menten equation and the catalytic mechanism was consistent with the ping-pong mechanism. Finally, a H 2 O 2 colorimetric assay with a linear range of 0.2–300 μM and a detection limit of 0.11 μM was constructed. In addition, due to the decolorization reaction of ox-TMB with glutathione and the scavenging effect of GSH on hydroxyl radicals (·OH), a glutathione colorimetric assay was further constructed with a linear range of 0.2–40 μM and a detection limit of 0.05 μM. It also verified that the assay had excellent selectivity and stability and could be utilized to detect actual samples.
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Journal of Nanomaterials
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2020
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IF 1.98
Wang Ya-zhen,Wu Xue-ying,Di Yu-tao,Lan Tian-yu,Zu Li-wu
In this paper, in order to take advantage of the combination between magnetic nano-Fe3O4 and surface modifier, a pH-sensitive drug delivery system that could effectively deliver doxorubicin (DOX) to tumor tissue was constructed. The novel drug delivery system named Fe3O4-TIPTS-g-(PEI-co-PEG) was prepared through three steps. The first step, a surface modifier with the thiol group, thiohydrazide-iminopropyltriethoxysilane surface modifier (named TIPTS), was synthesized for the first time. The second step, Fe3O4-TIPTS was synthesized by treating nano-Fe3O4 with TIPTS. The last step, Fe3O4-TIPTS-g-(PEI-co-PEG) was synthesized in the presence of the Fe3O4-TIPTS, polyethyleneimine (PEI), and polyethylene glycol (PEG) by mercapto-initiated radical polymerization. Among them, magnetic nanoparticles (MNPs) were used as magnetically responsive carriers, PEG was the surface-modifying compound, and PEI was the drug loading site which primary amine reacts with doxorubicin (DOX). Targeted nanoparticles were considerably stabilize in various physiological solutions and exhibited pH-sensitive performance in drug release. Thence, Fe3O4-TIPTS-g-(PEI-co-PEG) is a promising nanocarrier for targeting tumor therapy.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2020
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IF 3.232
Zi Hao Li,Jia Hao Bai,Xin Zhang,Jia Meng Lv,Cheng Shan Fan,Yong Mei Zhao,Zheng Long Wu,Hai Jun Xu
A facile method for synthesizing Au nanoparticle-coated Fe 3 O 4 magnetic composite nanospheres (Fe 3 O 4 @Au MCS) via seed-mediated growth and iterative reduction is reported. The nanospheres were then successfully used to detect malachite green (MG) residues in water bodies via surface-enhanced Raman scattering (SERS) technique. Fe 3 O 4 @Au MCS has excellent optical properties and superparamagnetism ; it can be dispersed into the solution to fully adsorb target molecules and then collected with a magnet to increase the molecular density and the number of SERS hot spots. Magnetic enrichment was superior to conventional detection method. The limit of detection for MG was 10 −7 M and the enhancement factor was 1.1 × 10 5 . The logarithm of the SERS intensity of the characteristic peak at 1618 cm −1 exhibited a linear relationship with the logarithm of the MG concentration over the range of 10 −3 – 10 −7 M, with a correlation coefficient of 0.966. The Fe 3 O 4 @Au MCS had good uniformity of SERS signals, with a 18.59% relative standard deviation for the SERS intensity. MG detection in aquaculture water conformed with the established quantitative regulations. The SERS spectrum calculated with density function theory for MG adsorbed on Fe 3 O 4 @Au MCS was very close to the experimental spectrum, which verified enhancement by the substrate. Overall, Fe 3 O 4 @Au MCS enabled ultrasensitive, quantitative SERS detection of MG.
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