Small
·
2021
·Vol. 17
·期 44
·2101845
·
IF 13.281
Guilei Zhu,Guanglin Xia,Xuebin Yu
On account of easy accessibility, high theoretical volumetric capacity and dendrite-free magnesium (Mg) anode, Mg battery has a great promise to be next generation rechargeable batteries, yet still remains a challenging task in acquiring fast Mg 2+ kinetics and effective cathode materials. Herein, hierarchical 3D cuprous sulfide porous nanosheet decorated nanowire cluster arrays with robust adhesion on copper foam (Cu 2 S HP/CF), which is employed as a binder-free conversion cathode material for magnesium/lithium hybrid battery, delivering impressively initial and reversible specific capacity of 383 and 311 mAh g −1 at 100 mA g −1 , respectively, which are obviously outperformed corresponding powder cathode in a traditional method by using polymer binder, is reported. Intriguingly, benefiting from the hierarchical nanoporous array architecture and self-assembly feature, Cu 2 S HP/CF cathode shows a remarkable cycling stability with a high capacity of 129 mAh g −1 at 300 mA g −1 over 500 cycles. This work not only highlights a guide for designing hierarchical nanoporous materials derived from metal–organic frameworks, but also provides a novel strategy of in situ formation to fabricate binder-free cathodes.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Qiuyan Bi,Chao Zhang,Jiandong Liu,Xingliang Liu,Shiai Xu
A nanofiltration (NF) membrane with positive charges capable of separating Mg 2+ and Li + from high Mg/Li ratio brine was prepared by interfacial polymerization of 1, 4-bis (3-aminopropyl) piperazine (BAPP)/trimesoyl chloride monomers, and then nano graphitic carbon nitride (g-C 3 N 4 ) functionalized with zwitterion (BHC-CN) was introduced into the active layer of the fabricated membrane. Salt permeation and selectivity were improved with the increase of BHC-CN content to 0.02% in BAPP solution. The morphology and surface chemical composition of BHC-CN were detected. The surface Zeta potential test indicates that the membrane fabricated with BHC-CN is positively charged at pH < 7.33. The presence of small aggregates on the surface of the membrane may increase the effective filtering area of the membrane and thus improve the permeability. It also exhibits long-time stability and excellent separation of Mg 2+ and Li + , and the Mg/Li ratio is decreased from 73 in the feed to 1.85 in the permeation. Moreover, the resulted membrane shows good fouling resistance. In conclusion, the membrane has potential advantages in water softening and recovering Li + from brine with high Mg/Li ratio.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
Biomedical Materials
·
2024
·Vol. 19
·期 4
·045026
·
IF 3.9
Yewen Zhong,Cong Liu,Xin Yan,Xiangdong Li,Xiaofeng Chen,Sui Mai
This study aimed to investigate the effects of magnesium-doped bioactive glass (Mg-BG) on the mineralization, odontogenesis, and anti-inflammatory abilities of human dental pulp stem cells (hDPSCs). Mg-BG powders with different Mg concentrations were successfully synthesized via the sol-gel method and evaluated using x-ray diffraction, Fourier-transform infrared spectroscopy, scanning electron microscopy, and transmission electron microscopy. Apatite formation was observed on the surfaces of the materials after soaking in simulated body fluid. hDPSCs were cultured with Mg-BG powder extracts in vitro, and no evident cytotoxicity was observed. Mg-BG induced alkaline phosphatase (ALP) expression and mineralization of hDPSCs and upregulated the expression of odontogenic genes, including those encoding dentin sialophosphoprotein, dentin matrix protein 1, ALP, osteocalcin, and runt-related transcription factor 2. Moreover, Mg-BG substantially suppressed the secretion of inflammatory cytokines (interleukin [IL]-4, IL-6, IL-8, and tumor necrosis factor-alpha). Collectively, the results of this study suggest that Mg-BG has excellent in vitro bioactivity and is a potential material for vital pulp therapy of inflamed pulps.
研究领域:
牙科学
·
材料科学
·
细胞生物学
✓ 已验证
DOI
高影响因子
BIOSYSTEMS ENGINEERING
·
2021
·
IF 4.123
Jiyong Shi,Yueying Wang,Zhihua Li,Xiaowei Huang,Tingting Shen,Xiaobo Zou
Nitrogen (N), magnesium (Mg), and potassium (K) deficiency all result in the decrease of chlorophyll density (CH.D) in cucumber leaf, but it is difficult to differentiate N/Mg/K-deficient leaves using CH.D. New nutrient indicators based on CH.D distribution features of the whole cucumber leaf were proposed to simultaneously diagnose N/Mg/K-deficient cucumber plants. CH.D distribution map in N/Mg/K-deficient and control leaves were determined non-destructively using hyperspectral imaging with the wavelength range of 430–960 nm. Compared with the CH.D distribution map of control group leaves, a decrease in CH.D could be observed on the whole area of N-deficient leaves, Mg-deficient leaves presented pixels with low CH.D between main leaf vein, and pixels with low CH.D at the border of K-deficient leaves. Distribution features were extracted from the CH.D distribution map and were employed to diagnose N/Mg/K-deficient leaves simultaneously, with the diagnostics rates of 96.67%. The results indicated that CH.D distribution features can realize the simultaneous diagnosing in the early stage of N/Mg/K deficiency and timely guidance of top dressing is of great significance to increase yield.
研究领域:
植物营养学
·
农业遥感
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Chengwang Yin,Shujun Qiu,Yongpeng Xia,Fen Xu,Lixian Sun,Hailiang Chu
Magnesium hydride (MgH 2 ) stands out as a promising solid-state material for high-density hydrogen storage , offering enormous potential for applications in hydrogen transportation and storage. However, the stable thermodynamics and sluggish kinetics of dehydrogenation/hydrogenation of MgH 2 impede its practical use in on-board hydrogen storage. In this study, the nanocomposite of nickel/manganese oxide (Ni/MnO) was successfully synthesized through the hydrogenation of nickel-manganese two-dimensional layered double hydroxide (NiMn-LDH) and then introduced into MgH 2 by ball milling to form BM-MgH 2 -Ni/MnO composite. Notably, BM-MgH 2 -Ni/MnO-10 displayed excellent hydrogen absorption/dehydrogenation properties. For example, its onset hydrogen release temperature was remarkably reduced to 175.6 °C, 84 °C lower than that of BM-MgH 2 . At a temperature of 250 °C, it could desorb about 6.2 wt% of H 2 within 60 min. The fully dehydrogenated product could absorb 5.5 wt% of H 2 within 10 min at 150 °C. Moreover, BM-MgH 2 -Ni/MnO-10 exhibited excellent cycling performance. Throughout the cycling process, the in-situ formation of Mg 2 Ni/Mg 2 NiH 4 and metal Mn was detected, leading to a synergistic effect that significantly enhanced the hydrogen storage capability of MgH 2 . This study presents innovative concepts for designing active catalysts to enhance the kinetics of de-/hydrogenation reactions of MgH 2 .
研究领域:
材料科学
·
氢能技术
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2018
·
IF 2.873
H.L. Pan,Y.X. Mao,Y.K. Yang,Y.W. Zhang,H.T. Wu
Li 2 Mg 3 Ti 1-X (Mg 1/3 Ta 2/3 ) X O 6 (x = 0.00, 0.05, 0.10, 0.15, 0.20) solid solution ceramics were prepared by the conventional solid-state reaction method. Rietveld refinements, Raman spectra, infrared spectra, polarizability and bond energy were used to research the changes of microwave dielectric properties of these solid solutions. With the increase of x values from 0 to 0.2, dielectric constants ( ε r ) gradually increased, which could be explained by the variations of the polarizability, infrared resonant modes and Raman vibration modes. The variations of the quality factor ( Q·f ) could be explained by the changes of the bond valences. The temperature coefficient of resonant frequency ( τ ƒ ) correlated with the bond energy of Ti O bonds. A small quantity of (Mg 1/3 Ta 2/3 ) 4+ can obviously improve the microwave dielectric properties. Excellent microwave dielectric properties of ε r = 14.70, Q·f = 200,600 GHz and τ f = −11.83 ppm/°C were obtained for Li 2 Mg 3 Ti 0.95 (Mg 1/3 Ta 2/3 ) 0.05 O 6 ceramic sintered at 1550 °C.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Yongqin Wang,Jilong Duan,Chenyang Cai,Yu Fu
The Mg-ion battery faces significant limitations due to its liquid electrolyte, which suffers from inherent issues such as leakage and the growth of Mg dendrites. In contrast, gel polymer electrolytes (GPEs) offer heightened safety, a wide voltage window, and excellent flexibility, making them a promising alternative with outstanding electrochemical performance. In this study, a cyano-modified cellulose (CEC) GPE was engineered to aim at enhancing ion transportation and promoting uniform ion-flux through interactions between N and Mg 2+ ions. The resulting CEC-based GPE demonstrated a high ionic conductivity of 1.73 mS cm −1 at room temperature. Furthermore, it exhibited remarkable Mg plating/stripping performance (coulombic efficiency ∼96.7 %) and compatibility with electrodes. Importantly, when employed in a Mo6S8//Mg battery configuration, the CEC GPE displayed exceptional cycle stability, with virtually no degradation observed even after 650 cycles at 1C, thereby significantly advancing Mg-ion battery technology due to its excellent electrochemical properties. This study provides valuable insights into the molecular engineering of cellulose-based GPEs.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
Materials Today Energy
·
2024
·
IF 9
Dingan Cai,Yinda Li,Yunhao Lu,Bo Xu,Jicheng Jiang,Aijun Zhou,Xiongwen Xu,Jian Tu,Shengming Yu,Bin Pan,Xinbing Zhao,Jian Xie
As one of the most promising sodium-ion battery cathodes, O3-type transition metal (TM) layered oxides (Na x TMO 2 ) with a high specific capacity and operating voltage have received a wide attention. However, they still face the problems of slow Na + transfer kinetics and undesirable phase transitions, and suffer from severe structural degradation when stored in a humid atmosphere. In this work, we propose a Mg/Cu co-doping strategy to synthesize NaLi 0.04 (Mg 0.02 Cu 0.04 Ni 0.19 Fe 0.33 Mn 0.42 ) 0.96 O 2 (LMCNFM) cathode. In this material, Mg serves to stabilize the layer structure and improve reversibility of the phase transitions, while Cu with Cu 2+ /Cu 3+ redox reaction contributes to capacity and enhances moisture stability. Mg/Cu co-doping can expand the Na + transfer channels, leading to improved rate performance. LMCNFM can deliver a specific capacity of 109.1 mAh g −1 even at 10 C rate. Mg/Cu co-doping can stabilize the TM layer and reduce the surface side reactions with electrolyte. LMCNFM can maintain 92.7 % of its initial capacity after 200 cycles at 5 C rate. Furthermore, spontaneous extraction of Na + when exposed to water is suppressed via Mg/Cu co-doping. After being soaked in water for 6 h, LMCNFM shows a minor structural degradation with 88.7 % capacity retained after 200 cycles at 1 C.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2024
·
IF 8
Runjie Liu,Shiwei Liu,Shichang Sun,Xing Cao,Junhao Lin,Juan Peng,Fei Ji,Rui Ma
The traditional solidification/stabilization (S/S) technology, Ordinary Portland Cement (OPC), has been widely criticized due to its poor resistance to chloride and significant carbon emissions. Herein, a S/S strategy based on magnesium potassium phosphate cement (MKPC) was developed for the medical waste incineration fly ash (MFA) disposal, which harmonized the chlorine stabilization rate and potential carbon emissions. The in-situ XRD results indicated that the Cl − was efficiently immobilized in the MKPC system with coexisting Ca 2+ by the formation of stable Ca 5 (PO 4 ) 3 Cl through direct precipitation or intermediate transformation (the Cl − immobilization rate was up to 77.29%). Additionally, the MFA-based MKPC also demonstrated a compressive strength of up to 39.6 MPa, along with an immobilization rate exceeding 90% for heavy metals. Notably, despite the deterioration of the aforementioned S/S performances with increasing MFA incorporation, the potential carbon emissions associated with the entire S/S process were significantly reduced. According to the Life Cycle Assessment, the potential carbon emissions decreased to 8.35 × 10 2 kg CO 2 -eq when the MFA reached the blending equilibrium point (17.68 wt.%), while the Cl − immobilization rate still remained above 65%, achieving an acceptable equilibrium. This work proposes a low-carbon preparation strategy for MKPC that realizes chlorine stabilization, which is instructive for the design of S/S materials.
研究领域:
环境科学
·
材料科学
·
废弃物管理
✓ 已验证
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2014
·Vol. 39
·期 7
·3313-3319
·
IF 2.93
Jing Lin,Fei Liang,Yaoming Wu,Wanqiang Liu,Limin Wang
We prepared Ti 1.4 V 0.6 Ni ribbons by arc-melting and subsequent melt-spinning techniques. Ti 1.4 V 0.6 Ni + x Mg ( x = 1, 1.5, 2, 2.5 and 3, wt.%) composite alloys were obtained by the mechanical ball-milling method. The structures and hydrogen storage properties of alloys were investigated. Ti 1.4 V 0.6 Ni + x Mg composite alloys contained icosahedral quasicrystalline phase, Ti 2 Ni-type phase, β-Ti solid-solution phase and metallic Mg. The electrochemical and gaseous hydrogen storage properties of alloys were improved with Mg addition. Ti 1.4 V 0.6 Ni + 2 Mg alloy showed maximum electrochemical discharge capacity of 282.5 mAh g −1 as well as copacetic high-rate discharge ability of 82.3% at the discharge current density of 240 mA g −1 compared with that of 30 mA g −1 , and the cycling life achieved above 200 mAh g −1 after 50 consecutive cycles of charging and discharging. The hydrogen absorption/desorption properties of Ti 1.4 V 0.6 Ni + x Mg ( x = 1, 2 and 3, wt.%) alloys were better than Ti 1.4 V 0.6 Ni. Ti 1.4 V 0.6 Ni + 3 Mg alloy also exhibited a favorable hydrogen absorption capacity of 1.53 wt.%. The improvement in the hydrogen storage characteristics caused by adding Mg may be ascribed to better hydrogen diffusion and anti-corrosion ability.
研究领域:
材料科学
·
金属功能材料
·
储能材料
·
物理化学
·
电化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Siqin Liu,Zhaoxia Li,Qiangliang Yu,Yuming Qi,Zhenjun Peng,Jun Liang
In this work, a new self-healing composite coating for corrosion protection of magnesium (Mg) alloy, which is based on the dual actions of the corrosion inhibitor M-16 embedded in the micro-arc oxidation (MAO) coating and self-healing polyurethane (PU) modified by disulfide bonds, is developed. Electrochemical impedance spectroscopy (EIS) and scanning electrochemical microscopy (SECM) are used to study the anti-corrosion performance of the scratched and healed composite coatings immersed in 3.5 wt% NaCl solution. Results show that the porous MAO coating is suitable to carry inhibitor M-16 and the anti-corrosion performance of the scratched coating is significantly improved by the inhibitor embedded in the MAO coating. The scratched coating exhibits an excellent recovery of the anti-corrosion performance after the heat treatment, which is attributed to the cooperation of dynamic disulfide bonds and shape-memory effect of the self-healing PU coating. Furthermore, it is found that the inhibitor M-16 embedded MAO coating can enhance the repair ability and anti-corrosion performance of the PU coating when the corrosion product was pre-formed inside the scratch of the composite coating.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Shahzad Afzal,Lingyue Jin,Ke Pan,Dandan Duan,Yang Wei,Munir Ahmad,Muhammad Naeem Shah,Fengyuan Chen
A cost-effective and eco-friendly catalyst is desirable for activating peroxymonosulfate (PMS) into reactive oxygen species (ROS) to abate organic pollutants in water. It is the first-ever research to synthesize a highly efficient PMS-activator by incorporating cobalt on as-synthesized Mg- and Al-loaded diatomite (DM) by impregnation (IM) and precipitation-deposition (PD) methods. The catalysts showed a mixture of the plate and pinnate-like morphologies. Atrazine (ATZ) degradation by diatomite-based catalysts followed the order of Co6Mg10/DM-IM > Co6Mg10/DM-PD > Co6Al10/DM-IM > Co6Al10/DM-PD. ATZ removal by sole PMS and adsorption was negligible. The Co6Mg10/DM-IM morphology, structure, and catalytic activity were well-maintained after reuse, with minor Co (0.05 mg L −1 ) and Mg (3.05 mg L −1 ) leaching. The ROS ( OH, SO 4 − , O 2 − and 1 O 2 ) were generated due to redox couples [Co 2+ /Co 3+ , and O 2− /O 2 ] and decomposition of PMS. Improved catalytic efficiency was ascribed to the Co/Mg and Co/Al synergism, spatially interconnected architecture with lower charge-transfer resistance, open porous structure, diffusion-friendly channels, abundant OH groups, and ROS generation. This research provides an insight into how tuning the surface chemistry of DM in terms of acidity and basicity can enhance the catalytic activity of other transition metals (such Fe, Mn, Cu, and their composites) for AOPs.
研究领域:
环境科学
·
催化化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）