Materials
·
2023
·Vol. 16
·期 16
·5511
·
IF 3.4
Anyu Yue,Yong Cao,Yi Zhang,Shenggang Zhou
The Mg-Li alloy stands as the lightest metallic structural material known to date, finding a wide range of applications. However, its development has been hindered by its susceptibility to oxidation and corrosion. In this study, we aimed to address this issue by employing electroless deposition to form a protective zinc layer on the surface of a magnesium–lithium alloy. The optimization of the zinc layer was achieved through varying parameters such as the zinc dipping time (1~10 min), temperature (20~70 °C), and zinc content (20~200 g/L). Surface characterization was performed using scanning electron microscopy (SEM) and X-ray diffraction, while electrochemical tests and scratch tests were conducted to evaluate corrosion resistance and coating adhesion. The results demonstrated the successful formation of a uniform and dense pure zinc layer on the surface of the Mg-Li alloy when the zinc-dipping time was set at 5 min, the temperature was at 30 °C, and the zinc content was at 50 g/L. Under these conditions, the corrosion potential of the Mg-Li alloy experienced the greatest positive shift, reaching as high as −1.38 V. Additionally, the corrosion current was minimized, measuring at 2.78 × 10−6A/cm2. Furthermore, the maximum arc tolerance radius was observed. Consequently, the electroless deposition of zinc onto Mg-Li alloys significantly improves their corrosion resistance and bonding, opening up new prospects for the application of zinc-plated Mg-Li alloys.Keywords:Mg-Li alloy;electroless-deposited;zinc coating;corrosion resistance
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Magnetochemistry
·
2023
·Vol. 9
·期 7
·181
·
IF 2.7
Xiaogang Yu,Renpeng Yang,Chengwei Wu,Bo Liu,Wei Zhang
Zn0.6Mg0.4CrxFe2−xO4(0 ≤ x ≤ 0.4) nanoparticles were synthesized using a hydrothermal technique. The obtained magnetic nanoparticles (MNPs) exhibited a spinel structure, where the lattice constant decreased with the Cr3+ion content. The doping of Cr3+ion (x = 0.1) increased the specific saturation magnetization to 46.4 emu/g but decreased to 20.0 emu/g with the further increase in the Cr3+ion content to x = 0.4. The decrement in Curie temperature was ascribed to the weakened super-exchange interaction between the metal ions located atA-sites andB-sites, which arose from the doping of the Cr3+ion. The T2-weighted images gradually darkened with the increase in Zn0.6Mg0.4Cr0.1Fe1.9O4nanoparticles concentration, suggesting that the nanoparticles can enhance the image contrast. Zn0.6Mg0.4CrxFe2−xO4(0 ≤ x ≤ 0.4) nanoparticles were able to heat the agar phantom to the hyperthermia temperature under the safe alternating magnetic field, which showed their potential in the magnetic induction hyperthermia.Keywords:magnetic nanoparticles;Curie temperature;hyperthermia
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Hui Liang,Jing Li,Xinhui Shen,Benliang Cao,Junxiang Zhu,Baozhang Geng,Sihang Zhu,Wenjiang Li
Amorphous catalysts have a large number of catalytic active sites. Here, we report a magnesium composite trace lanthanum catalyst (La@Mg), in which La and Mg layers form amorphous Mg–La compound on the surface of layered Mg. The test shows this La@Mg has hydrogen storage capacity of about 7.6 wt% and hydrogen desorption of 7.2 wt%, higher than that of crystalline La@Mg and sole Mg, rapid absorption/desorption kinetic and stable reversible absorption/desorption cycles. La@Mg exhibits an optimistic hydrogen storage performance than Mg-based materials previously reported in the literature. Combined with theoretical calculations, it is shown that the amorphous Mg–La has an catalysis on hydrogen storage performance of La@Mg system, which contributing to the dispersion of Mg and providing channels for hydrogen diffusion, facilitating hydrogenation by accelerating H atoms diffuse between the subsurface and the surface. This work provides experiment and mechanism guidance for the development of efficient hydrogen storage materials.
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CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Yingming Zhang,Yujie Yang,Congliang Chen,Dongyang Chen,Yuting Meng
Zn 0.35 Co 0.05 Ni 0.60- x Mg x Fe 1.96 O 4 ferrites ( x = 0, 0.08, 0.16, 0.24, 0.32, 0.40) were prepared via a solid-state reaction. The phase composition and microstructure of the ferrite powders were analysed and the samples were determined to be pure spinel ferrites. At x = 0.24, the volume loss ( P CV ) of this ZnCoNiMg ferrite was as high as 829.23 mW/cm 3 . An increase in the amount of Mg substitution decreased the density of the ferrite sample, resulting in a larger P CV . Analysis of the magnetic hysteresis (M − H) loops revealed that ZnCoNiMg ferrites had the distinct magnetic properties of a soft magnetic ferrite. When x = 0.24, the reflection loss of this ZnCoNiMg ferrite sample had a minimum value of −36.713 dB under certain conditions. The more single domain particles, the more electromagnetic energy absorbed by ferromagnetic resonance effect. Based on these magnetic properties and absorption properties, the ZnCoNiMg ferrites have excellent potential for absorbing electromagnetic energy and are suitable for fabricating wave-absorbing materials.
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ACS Applied Nano Materials
·
2023
·
IF 5.9
Xiaoqian Peng,Jing Zhang,Jinqiang Sun,Xiaochan Liu,Xinfu Zhao,Shimo Yu,Zhipeng Yuan,Sijia Liu,Xibin Yi
One of the most promising methods for capturing carbon dioxide (CO2) is solid physical adsorption, which is an efficient and simple technique. The key to effective CO2 capture is the development of high-performance solid adsorbents with excellent CO2 adsorption capacity, CO2/N2 selectivity, and rapid adsorption/desorption kinetics. In this paper, a Mg-MOF-74/sodium alginate composite aerogel was prepared by loading Mg-MOF-74 on sodium alginate sheets followed by directional freeze-drying. The composite aerogel exhibited a hierarchical porous structure, in which sodium alginate provided an open mesoporous/macroporous structure that promoted diffusion and contact with the active center of CO2. The Mg-MOF-74 micropores/mesopores promoted the strong interaction between CO2 and the adsorbent in the micropore and rapid mass transfer of CO2 to the adsorbent through the mesopores. The experimental data showed that MSA-6 achieved CO2 adsorption of 2.461 mmol·g–1 at 298 K. Furthermore, the CO2/N2 adsorption selectivity of MSA-6 reached 35.108, indicating its strong CO2 selective adsorption potential.
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Journal of Magnesium and Alloys
·
2021
·
IF 10.088
Hui Yong,Xin Wei,Jifan Hu,Zeming Yuan,Shihai Guo,Dongliang Zhao,Yanghuan Zhang
The composites comprised of Co nanoparticle and C nanosheet were prepared though a high-temperature carbonization reaction. The catalysis of Co@C composites on the hydrogen storage behavior of Mg 90 Ce 5 Y 5 alloy was investigated in detail by XRD, SEM, TEM, PCI, and DSC method. Because of the synergistic catalytic function of C and Co in C@Co nanocomposites, the Mg 90 Ce 5 Y 5 alloy with 10 wt.% C@Co shows the excellent hydrogen absorption and desorption performances. Time for releasing hydrogen reduces from 150 min to 11 min with the addition of the C@Co composites at the temperature of 300 °C. Meanwhile, the dehydrogenation activation energy also declines from 130.3 to 81.9 kJ mol −1 H 2 after the addition of the C@Co composites. This positive effect attributes to the C layer with the high defect density and the Co nanoparticles, which reduces the energy barriers for the nucleation of Mg/MgH 2 phase and the recombination of hydrogen molecule. Besides, the C@Co composites also improve the activation property of the Mg 90 Ce 5 Y 5 alloy which was fully activated in the first cycle. Moreover, the temperature for initial dehydrogenation and the endothermic peak of the alloy hydride were also decreased. Although the addition of the C@Co composites increases the plateau pressures and decreases the value of the decomposition enthalpy, these differences are so small that the improvement on thermodynamics can hardly be seen.
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JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 27
·13216-13231
·
IF 3.553
Huang Liqu,Wang Xianli,Zhang Yue,Cheng Zhaojun,Xue Feng,Guo Yunfei,Deng Yongji,Chu Chenglin,Tao Li,Bai Jing
Hypospadias is a common congenital malformation of the male urogenital system. As a recently arisen reconstruction method for hypospadias, polymer tissue engineering urethral scaffold often results in necrosis and other complications due to the lack of bioactivity. To improve the bioactivity of polymer, in this work, we prepared biodegradable Mg/poly(lactic-co-glycolic acid) (PLGA) composite nanofiber scaffolds by electrospun with 3, 6, and 9 wt.% of micron-scale Mg particles. The mechanical properties of the PLGA scaffold gradually decrease with the addition of Mg particles but still at an acceptable level. On the other hand, these composite scaffolds show very good biocompatibility and promotional bioactivity, namely non-cytotoxicity, gradual proliferation enhancement, and good adhesion state of human adipose stem cells (HADSCs) on the scaffold surface. Besides, through quantitative real-time polymerase chain reaction (qRT-PCR) test, different genes expression levels of human umbilical vein endothelial cells (HUVECs) were also gradually up-regulated with the increase in Mg content. The present results indicate that Mg containing PLGA scaffolds might not only have the potential to promote tissue regeneration related to urethral repair, but also stimulate endothelial cells to achieve vascularization and anti-inflammatory functions. Consequently, considering both the mechanical properties and bioactivity for clinical demand, the Mg/PLGA composite scaffolds with suitable Mg contents are promising for the regeneration of defective urethral tissues.
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ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Zishuai Zhang,Yi Li,Gongyuan Zhao,Lin Zhu,Ye Sun,Flemming Besenbacher,Miao Yu
Thanks to the low cost, free dendritic hazards, and high volumetric capacity, magnesium (Mg)-ion batteries have attracted increasing attention as alternative energy storage devices to lithium-ion batteries. Despite the successful development of electrode materials, the real-life application potential of Mg-ion full battery systems (MIFBSs) is largely hindered by the lack of suitable electrode couples and hence low diffusion kinetics, which induce low specific capacity, poor rate performance, and low working voltage. Herein, we report an aqueous rechargeable MIFBS by employing copper hexacyanoferrate (CuHCF) as the cathode and 3,4,9,10-perylene-tetracarboxylic acid diimide (PTCDI) as the anode in 1 moL L–1 MgCl2 electrolyte. The combination of PTCDI//CuHCF allows efficient redox and convenient intercalation/deintercalation of Mg2+ at the electrodes while facilitating a fast transfer of Mg2+ between the two electrodes. As a result, the system delivers a high capacity of ∼120.3 mAh g–1 at a current density of 0.5 A g–1 after 200 operation cycles with a broadened voltage range (0–1.95 V) and maintains a capacity of ∼97.8 mAh g–1 at 2.0 A g–1 after 1000 cycles. Even at a high current density of 5.0 A g–1, the battery provides a steady capacity of ∼81.4 mAh g–1 over 5000 cycles. Moreover, after being applied at 11.0 A g–1, the system can deliver a capacity of ∼126.5 mAh g–1 at 0.5 A g–1. This work emphasizes the great promise of developing suitable electrode couples for aqueous MIFBSs to achieve high capacity and high rate.
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Materials Science & Engineering C-Materials for Biological Applications
·
2021
·
IF 7.328
Yongmei Ge,Kui Wang,Huili Li,Ye Tian,Yutong Wu,Zhaowei Lin,Yangyang Lin,Yansong Wang,Jiarong Zhang,Bin Tang
Bone pain is the primary problem for patients with osteoporosis. Ketoprofen is clinically used to treat osteoporotic pain, while long-term oral administration of ketoprofen can cause some side effects. In addition, osteoporosis is also accompanied by bone mass loss and inflammation. In this study, we designed a multifunctional drug (Ket@Mg-MOF-74) adopted Mg-MOF-74 to load ketoprofen to treat osteoporotic pain, bone loss and inflammation comprehensively. Mg-MOF-74 was prepared, and the physicochemical characterization proved that it had excellent physical and chemical stability. Ket@Mg-MOF-74 was synthesized by post-synthetic modification method and a high loading rate of ketoprofen was confirmed. Drug release and ion release experiments indicated Ket@Mg-MOF-74 had a good controlled release of ketoprofen and Mg in solution. Cell experiments in vitro proved the compound drug could significantly reduce the expression of pain-related genes of cyclooxygenase 2 (COX2), obviously up-regulated the expression of osteogenic cytokines and remarkably down-regulated the secretion of pro-inflammatory factors. Therefore, Ket@Mg-MOF-74 is believed a promising painkiller for osteoporotic bone pain, with the function of anti-inflammatory and promoting bone formation.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·
IF 4.939
Hui Liang,Dandan Chen,Minfang Chen,Wenjiang Li,Rony Snyders
The nano metallic-based material has received the particular attention of scientists in H 2 storage. Herein, an efficient air-stable nano metallic magnesium (Mg)-Polymethyl methacrylate (PMMA) system, in which methyl magnesium chloride (MeMgCl) as organic Mg precursor is in-situ reduced to metallic Mg particles (Mg NPs) by lithium naphthalene (Li-naphthalene) in soluble PMMA/THF system, exhibits an excellent H 2 storage performance and do not require harsh operation condition. In order to form well-distributed Mg NPs (co. 5 nm) in PMMA gel framework, it is an important procedure to mix Mg ion and Li-naphthalene completely, as well the restriction effect of polymer molecular chain . The synthesized mechanism of nanocomposite and the optimal reaction conditions were ascertained by designing a series of experiments. Notably, PMMA can not confined the size of metallic Mg by blending method, and the mixed β/γ-Mg presents nearly no ability to adsorb hydrogen. Here, the air stable Mg NPs is in-situ reduced in PMMA can be reacted with H 2 , and O 2 and H 2 O molecules can not be infiltrated into PMMA. The correlation between the size of Mg NPs, the amount of PMMA and hydrogen storage performance for the PMMA-Mg NPs composite (PMC) is studied. We have found that hydrogen storage capacity of PMC could be enhanced as decreasing the size of Mg NPs by adjusting the amount of PMMA. The Mg NPs in PMMA might release the higher amount of H 2 at below 300 °C with a rapid absorption/desorption kinetics than the reported material in literature. The obtained nanocomposite are able to deliver dense hydrogen in demanding environments.
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MICROCHIMICA ACTA
·
2019
·Vol. 186
·期 6
·1-8
·
IF 5.479
Yalikun Nuerbiya,Mamat Xamxikamar,Li Yongtao,Hu Xun,Wang Ping,Hu Guangzhi
The authors describe a method for synthesis of a nanomaterial consisting of porous carbon encapsulated Mg-Al-Si alloy (denoted as Mg-Al-Si@PC) nanocluster. The nanocluster was synthesis by a solvothermal reaction, followed by high-temperature annealing. The nanoclusters were used as a novel immobilization platform for electrochemical sensing of rutin. The electrochemical behavior of rutin at a modified electrode was investigated by cyclic voltammetry and differential pulse voltammetry. The modified electrode demonstrates a high electrocatalytic activity toward rutin oxidation at a relatively low working potential (0.6 vs. Ag/AgCl). Under optimal conditions, the sensor has a linear response in the 1–10 μM rutin concentration range, and a 0.01 μM lower detection limit (at an S/N ratio of 3). It was successfully applied to the quantification of rutin in pharmaceutical tablets, and satisfactory results were obtained. Furthermore, the results correspond with those with the standard method and with the amounts indicated by the producer, respectively.
Schematic diagram of the Mg-Al-Si@PC nanocluster preparation process and electroanalysis mechanism.
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ChemMedChem
·
2019
·Vol. 15
·期 1
·13-16
·
IF 3.016
Zhen Li,Ying Peng,Xiangchao Pang,Bin Tang
Graphical Framework for strong bones : We explored the potential therapeutic effects of magnesium-based metal organic frameworks (MOFs) in osteoarthritis (OA). Mg/HCOOH−MOF was introduced and characterized by SEM, XRD, TGA, and FTIR. ICP−MS data proved that Mg/HCOOH−MOF is stable in various physiological media and can maintain the release of Mg 2+ ions for a long period. MTT assays showed that it is biocompatible and can promote cell proliferation, while qPCR results indicated its activity in anti-inflammation and bone protection, making Mg/HCOOH−MOF potentially suitable for treating OA. This study was designed to explore the potential therapeutic effects of Mg-based metal organic frameworks (MOFs) in osteoarthritis (OA) and to broaden the application field of MOFs. Mg/HCOOH−MOF was introduced and characterized by using SEM, XRD, TGA, and FTIR. ICP-MS results proved that Mg/HCOOH−MOF is stable in various physiological media and can maintain the release of Mg 2+ ions for a long time. In vitro experiments were carried out to evaluate its potential application in attenuating OA. Mg/HCOOH−MOF was successfully synthesized, and results of MTT assays showed that it is biocompatible and can promote cell proliferation. qPCR results suggested that it can significantly regulate the expression of OCN, Axin2, iNOS and IL-1β, which indicated its activity in anti-inflammation and bone protection. We believe that Mg/HCOOH−MOF could benefit OA therapy.
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