COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2022
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IF 9.463
Ting Liu,Na Zhang,Kaili Zhang,Yan Wang,Yiming Qi,Meng Zong
Two-dimensional layered metal carbides (MXene) have a broad application prospect in electromagnetic absorption, but suffer from poor impedance matching, which limits the absorbing performance. Herein, an efficient nanocomposite absorber was successfully prepared via loading Co-substituted β 2 -keggin-type polyoxometalate doped with polypyrrole and Fe 3 O 4 on the surface of MXene . Polyoxometalate and HCl as a proton acid doped polypyrrole, with anions attached to the main chain, could adjust the electromagnetic parameters, making the nanocomposites material easily achieve the best conductivity and impedance matching; Fe 3 O 4 introduced magnetic loss, and the freedom of movement of Fe 2+ and Fe 3+ caused multiple polarization; dipole polarization was induced by defects, dipoles and dangling bonds in nanocomposites; the charge accumulated at the three phase interface and led to interfacial polarization. We had conducted research on the absorbing properties of nanocomposites with different as-prepared unitary to ternary products, loading rates and component proportion. When the filling level was 45 wt%, an optimal reflection loss value of MXene/PPy@β 2 -SiW 11 Co/Fe 3 O 4 nanocomposites at only 1.7 mm reached up to −62.6 dB, and the effective absorption bandwidth of 9 GHz could be obtained at the low thickness range of 1.5–2.9 mm. These results demonstrated that the prepared nanocomposites were expected to be a promising electromagnetic wave absorber with thin thickness and high absorption intensity.
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Materials Today Communications
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2022
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IF 3.662
Asim Mushtaq,Zhe Tang,Yike Hou,Zheng Zhu,Cong Tian,Yuling Wu,Yuguang Lu,M. Zubair Iqbal,Xiangdong Kong
Theranostic nanomedicine designs integrating diagnostic and therapeutic paradigms have been achieving considerable success at clinics. However, the toxicity of nanocomposites in these designs remains a major obstacle to the success of personalized medicine. Herein, highly biocompatible iron and hydroxyapatite materials were selected to design a Fe 3 O 4 -HAp nano-theranostic system with controlled dimensions using simple solvothermal synthesis . The biocompatibility of Fe 3 O 4 -HAp magnetic hydroxyapatite nanocomposites (MHNCs) was further enhanced by Food and Drug Administration- (FDA-) approved triblock copolymers , namely, Pluronic® F-127. Indeed, polymer modification improved the drug encapsulation capacity of HAp, and 70% anti-TROP 2 was loaded onto the surface of MHNCs for intracellular targeting of breast cancer. The Fe 3 O 4 component of MHNCs possessed a high T 1 -MR imaging enhancement feature with an excellent r 1 value, demonstrating these MHNCs as capable substitutes for Gd-based toxic contrast agents. Moreover, indocyanine green (ICG-) coupled-MHNCs revealed strong absorption in the near-infrared region and produced enough temperature (75 °C), even at low (50 ug/mL) concentrations, to ablate cancerous cells upon 808 laser irradiation to induce cell toxicity and apoptosis. The promising diagnostic and photothermal therapeutic performance of these designed MHNCs make them an ideal nano-theranostic agent.
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Materials Chemistry Frontiers
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2022
·Vol. 6
·期 17
·2524-2534
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IF 8.683
Xinyan Lv,Zhonglin Wei,Canyu Cui,Wenwen Wang,Yumei Tan,Shihui Jiao,Guangsheng Pang
Developing superhydrophobic material with good chemical stability, non-toxic and low-cost for effectively handling oil spill incidents, chemical leakages and industrial oily wastewater has become an urgent need. In this work, superhydrophobic Fe3O4@C microspheres have been successfully anchored on polyurethane (PU) sponge skeleton surface with polyvinylidene fluoride (PVDF) as intermediate layer. The superhydrophobic Fe3O4@C/PVDF/PU sponge possesses outstanding superhydrophobic performance with water contact angle (WCA) of 156.5° and sliding angle (SA) of 6°. Meanwhile, the Fe3O4@C/PVDF/PU sponge shows excellent chemical, thermal and mechanical stabilities under harsh conditions, high separation efficiencies for surfactant-stabilized organic solvent/water emulsions (more than 99.6% for both O/W and W/O emulsions) and preferable recyclability (more than 15 cycles). The comprehensive performances of the Fe3O4@C/PVDF/PU sponge make it a promising candidate for the treatment of industrial oily wastewater.
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Arabian Journal of Chemistry
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2022
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IF 6.212
Jiacheng Li,Lisha Liao,Yannan Jia,Tian Tian,Shiwei Gao,Chenyue Zhang,Wei Shen,Zheng Wang
In this study, the preparation of magnetic Fe 3 O 4 /ZIF-8 (MFZ) and its adsorption properties for Cd(II) from water were investigated. Various characterizations demonstrate that the as-prepared MFZ has well magnetic-separation performance and thermal stability. In batch adsorption tests, the effects of pH, initial concentration, and adsorbent dosage were evaluated. According to the findings, when the pH is 7 and the dosage is 150 mg/L, the adsorption capacity for a 40 mg/L Cd(II) solution reaches 102.3 mg/g in 180 min. The Cd(II) adsorption processes was found to correspond to pseudo-first-order kinetics and Langmuir model according to the adsorption kinetics and isotherms. The Langmuir model predicted a maximal saturation adsorption capacity of 160.26 mg/g at 298 K. Thermodynamic analysis revealed that the Cd(II) adsorption is an endothermic, spontaneous process. Ion exchange, coordination reaction, and electrostatic interaction are all involved in Cd(II) adsorption by MFZ. The optimum conditions for Cd(II) adsorption were proposed and confirmed in accordance with the results of the response surface optimization experiments. Furthermore, regeneration tests demonstrate the great repeated regeneration ability of MFZ. According to the anticipated production cost, treating wastewater with a Cd(II) concentration of 40 mg/L would cost roughly US$ 8.35/m 3 . MFZ showed good potential for Cd(II) removal from water.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Ming Xiao,Ruixue Li,Jinglin Yin,Junhui Yang,Xinyu Hu,Hongbo Xiao,Wenlei Wang,Ting Yang
The treatment of arsenite pollution in water has always been concerned. Oxidation of high toxic As(III) to relatively low toxic As(V) by efficient photocatalytic oxidation technology is a research hotspot. This paper is focused on the active photocatalyst of TiO 2 @Fe 3 O 4 composites synthesized by a simple hydrothermal method for the efficient photocatalytic oxidation of As(Ⅲ). The successful construction of Ti–O–Fe interface bonds between TiO 2 and Fe 3 O 4 significantly promoted the transfer efficiency of photo-generated carriers, and further rapidly improved the photocatalytic oxidation efficiency of As(Ⅲ). The application results showed that the constructed TiO 2 @Fe 3 O 4 photocatalyst with 0.10 g Fe 3 O 4 (TF-0.10) could complete the transformation from As(Ⅲ) (10,000 μg/L) to As(Ⅴ) within 4 min with a high oxidation ratio of 100% and maintained the good properties with unchanged crystal structure after five cycles. Furthermore, the photocatalytic properties of TiO 2 @Fe 3 O 4 composites were still stable under different pH values. Electron paramagnetic resonance (EPR) consequence displayed that the superoxide radical (‧O 2 — ) and hole (h + ) were the main intermediate product in the arsenic photocatalytic oxidation system, and hydroxyl radical (‧OH) had little effect on this oxidation system. The possible mechanism of As(Ⅲ) photocatalytic conversion was further explored based on the results of the data analysis. Furthermore, this work provides a potential new idea for the practicability of efficient photocatalytic arsenic oxidation.
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CHEMOSPHERE
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2022
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IF 8.943
Umair Azhar,Muhammad Arif,Muhammad Sohail Bashir,Muhammad Babar,Muhammad Sagir,Ghulam Yasin
High internal phase emulsion (HIPE) technology has been emerged as a prodigious source to create tailor-made porous structures. This type of emulsion contains significantly higher amount of water in it, which is only possible with special type of stabilizers. Most specifically, the monomers with sufficiently high solubility in water such as methyl methacrylate (MMA) make it more cumbersome to stabilize in the form of HIPE. Here we have reported the combination of stabilizers including fluorinated block copolymer Poly (2-dimethylamino)ethyl methacrylate- b -Poly(trifluoroethyl methacrylate) (PDMAEMA- b -PTFEMA) and humic acid modified iron-oxide (HA-Fe 3 O 4 ) nanoparticles (NPs) to stabilize HIPE, which resulted in highly porous and interconnected products. Fluorinated block copolymers with inherent hydrophobic nature along with iron oxide nanoparticles increased the water repellency of MMA based polymeric monoliths. Increasing the amount of stabilizer increased the porosity and BET specific surface area to 83.8% and 27 ± 0.8 μm, respectively. The prepared porous materials demonstrated hydrophobic characteristics while adsorbing oil from the surface of water up to 16 g/g. Moreover, the adsorbed oil from the prepared monolith was recovered by using simple centrifugation method without damaging the structure. This research opens new avenues to prepare more useful oil and water separation materials such as membranes, pollutant adsorbers, and so on.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2022
·Vol. 30
·期 3
·8098-8109
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IF 5.19
Shan Junyue,Wu Xianliang,Li Caifang,Hu Jiwei,Zhang Zhenming,Liu Huijuan,Xia Pinhua,Huang Xianfei
The photocatalytic degradation of antibiotics requires a good separation efficiency of photogenerated electron–hole pairs and a wide visible light absorption range. Current studies have discussed the successful preparation of ferroferric oxide/graphite carbon nitride/reduced graphene oxide (Fe 3 O 4 /g-C 3 N 4 /rGO). The phase structure and morphology of the Fe 3 O 4 /g-C 3 N 4 /rGO composites were characterized by XRD, HR-TEM, SEM, and EDS. The obtained composites were used to degrade tetracycline hydrochloride (TCH) to evaluate its photocatalytic activity. The effects of four variables on the degradation of TCH were analyzed by the response surface method and artificial intelligence (gradient regression tree, random forest, artificial neural network, etc.). The results showed that the graphite carbon nitride in the catalyst maintained its original structure and that the photocatalytic activity was significantly improved. The degradation rate of TCH was 86.7% under the optimal conditions (the Fe 3 O 4 /g-C 3 N 4 /rGO dosage was 0.1 g, pH = 7.0, the initial concentration of TCH was 20 mg/L, and the visible light irradiation time was 60 min). At the same time, the degradation rate of TCH changed little after the material was used five times, which indicates that the stability and recyclability of the Fe 3 O 4 /g-C 3 N 4 /rGO photocatalyst were excellent. Finally, a possible photocatalytic mechanism of the Fe 3 O 4 /g-C 3 N 4 /rGO photocatalyst is proposed in this paper.
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ANALYTICAL CHEMISTRY
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2022
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IF 8.008
Liuying He,Xiao Wang,Junyu Chen,Yuze Li,Liping Wang,Caiqiao Xiong,Zongxiu Nie
Liver cancer (LC) is the third frequent cause of death worldwide, so early diagnosis of liver cancer patients is crucial for disease management. Herein, we applied NH2-coated polystyrene@Fe3O4 magnetic beads (PS@Fe3O4–NH2 MBs) as a matrix material in laser desorption/ionization mass spectrometry (LDI-MS). Rapid, sensitive, and selective metabolic profiling of the native biofluids was achieved without any inconvenient enrichment or purification. Then, based on the selected m/z features, LC patients were discriminated from healthy controls (HCs) by machine learning, with the high area under the curve (AUC) values for urine and serum assessments (0.962 and 0.935). Moreover, initial-diagnosed and subsequent-visited LC patients were also differentiated, which indicates potential applications of this method in early diagnosis. Furthermore, among these identified compounds by FT-ICR MS, the expression level of some metabolites changed from HCs to LCs, including 29 and 12 characteristic metabolites in human urine and serum samples, respectively. These results suggest that PS@Fe3O4–NH2 MBs-assisted LDI-MS coupled with machine learning is feasible for LC clinical diagnosis.
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CERAMICS INTERNATIONAL
·
2021
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IF 4.527
Jiajun Xu,Shiyu Tang,Dong Liu,Zhihui Bai,Xinyue Xie,Xiaoshuang Tian,Weiting Xu,Wenjie Hou,Xiuxia Meng,Naitao Yang
Multilayered structures with abundant interfaces are highly desired for reducing the thickness and improving electromagnetic (EM) attenuation ability. Herein, elaborately designed laminar Fe 3 O 4 /MXene nanosheets exhibit great potential as high-efficiency and lightweight absorbers due to heterogeneous structure coupled with intensive magnetic-dielectric synergistic effect. The MXene nanosheets with metallic conductivity not only serve as a supporter to carry the magnetic Fe 3 O 4 , but also provide massive interfaces to facilitate the transport of charge carriers. Hollow Fe 3 O 4 microspheres were evenly dispersed without apparent agglomeration on the MXene surface, giving rise to largely enhanced consumption ability of –42.7 dB over a broad qualified bandwidth (5.7 GHz) at 2.5 mm. Besides, static density functional theory (DFT) method was introduced to shed light on the absorption mechanism by portraying the interaction between the Fe 3 O 4 and MXene. This study provides a crucial strategy for designing magnetic-supported composites by means of a large family of MXenes as thin and lightweight EM absorbers.
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INDUSTRIAL CROPS AND PRODUCTS
·
2021
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IF 5.645
Guangyu Wu,Qi Liu,Jingyi Wang,Siye Xia,Hualong Wu,Jiaxiang Zong,Jiangang Han,Weinan Xing
Wastewater containing pharmaceuticals can be bioaccumulated, posing a potential risk to drinking water, human health, and ecosystems. In order to make the adsorption process more suitable for actual application, rape straw biomass fiber (treated by an acidified sodium chlorite solution, 5%) and Fe 3 O 4 embedded β-CD to prepare a novel adsorbent (RSBCDF), which was used for the removal of ibuprofen (IBP) from aqueous solution. The RSBCDF was characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Brunauer-Emmett-Teller (BET) measurements, scanning electron microscopy (SEM), and zeta potential measurements. The synthesized adsorbent was studied with regard to IBP removal percent under different adsorption conditions such as varying initial pH levels (4–10), initial ibuprofen concentrations (20−160 mg/L), contact time (5−150 min), and the dosage of adsorbent (10−100 mg) via batch adsorption experiments. The adsorption kinetics, thermodynamics, and isotherms were also investigated. The IBP adsorption behaviour followed a pseudo-second-order kinetic model and the Freundlich isotherm model. The maximum adsorption capacity obtained for ibuprofen was 48.29 mg/g. The values of Gibbs free energy change were negative (-2.58∼-3.56KJ/mol), suggesting that the process of ibuprofen adsorption onto adsorbent was spontaneous. The positive value of standard enthalpy change (12.09 kJ/mol) indicated that the adsorption process was endothermic. The obtained results prove that RSBCDF is a proficient and economically suitable material for removing IBP from water environments.
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Nanoscale
·
2021
·Vol. 13
·期 39
·16571-16588
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IF 7.79
Yu Zhang,Yifeng Yang,Jinsheng Shi,Lili Wang
Weak acidity (6.5–6.9) and limited H2O2 level in the tumor microenvironment (TME) usually impact the therapeutic effect of chemodynamic therapy (CDT) for cancer. A Specific TME promotes the formation of an immunosuppressive microenvironment and results in high rate of recurrence and metastasis of cancer. Fe3O4@ZIF-8/GOx@MnO2 multi-layer core shell nanostructure was constructed as a hybrid nanozyme. After magnetic targeting of the tumor site, the outermost MnO2 shell catalyzed H2O2 in TME to produce O2 and was broken due to the reaction with glutathione. Due to the acid response, the ZIF-8 layer would crack and release glucose oxidase (GOx) and Fe3O4. The generated O2 was utilized by GOx in starvation therapy to consume glucose and produce H2O2 and gluconic acid. The Fenton reaction efficiency of Fe(II) was improved by the increased H2O2 concentration and the enhanced acidity in TME. At the same time, the intrinsic photothermal effect of Fe3O4 upon 808 nm laser irradiation promoted the activity of MnO2 and GOx as oxidase, and Fe(II) as catalase-like, and ablated the primary tumor. Moreover, the hybrid nanozyme can facilitate the transformation of M2-type macrophages to M1-type, and strong systemic antitumor immune effect was induced. A synergy of multiple therapeutic modes including starvation therapy, CDT, photothermal therapy (PTT), and immunotherapy can be realized in the hybrid nanozyme for tumor therapy.
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ENVIRONMENTAL RESEARCH
·
2021
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IF 6.498
Junning Wang,Minqian Zeng,Yanhong Zhao,Xiaoxin Zuo,Fanrong Meng,Hongying Jie,Fang Lv,Yu Lu,Jibo Hou
Toxic phenol pollutants pose a great threat to the environment, it is urgent to develop an efficient and recyclable method to monitor phenol. Herein, we reported the synthesis of catalase-Fe 3 O 4 @ZIF-8 (CAT-Fe 3 O 4 @ZIF-8) through a novel amino-acid-boosted one-pot embedding strategy that synergically integrated catalase and magnetic Fe 3 O 4 nanoparticles with ZIF-8. As expected, CAT-Fe 3 O 4 @ZIF-8 exhibited enhanced catalytic activity compared with Fe 3 O 4 @ZIF-8, CAT@ZIF-8 and catalase. Depending on the satisfactory performance of CAT-Fe 3 O 4 @ZIF-8, a colorimetric detection platform for phenol based on CAT-Fe 3 O 4 @ZIF-8 was constructed. The corresponding detection limit was as low as 0.7 μM, and a wide linear range of 5–100 μM was obtained. Besides, CAT-Fe 3 O 4 @ZIF-8-based colorimetric detection platform has been verified to possess high stability and recyclability . The proposed method was proven to have potential practical applications in the field of water treatment , which would advance efficient, recyclable monitoring of water quality.
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