GREEN CHEMISTRY
·
2024
·Vol. 26
·期 5
·2763-2772
·
IF 9.3
Lei Guo,Shuaibo Gao,Zuojun Hu,Yongxin Wu,Fangzhao Pang,Huayi Yin,Dihua Wang
Green metal-electrode batteries call for the clean production of s-block metals. Herein, we developed an electrolysis–displacement–distillation (EDD) approach for producing s-block metals with low-carbon emissions and no chlorine gas evolution. The clean production stems from the choice of a molten NaCl–Na2CO3 electrolyte to prevent chlorine gas evolution, an inert nickel-based anode to produce oxygen, and a liquid metal cathode to make the cathodic product (e.g., Na–Sn) sit at the bottom of the electrolytic cell. Later, M–Sn (M = Li, Mg, Ca, Sr, and Ba) alloys were successfully prepared by a displacement reaction between the Na–Sn alloy and molten NaCl–LiCl, NaCl–MgCl2, NaCl–CaCl2, NaCl–SrCl2, or NaCl–BaCl2 with a displacement efficiency of >96.0%. Furthermore, Li, Mg, Ca, Sr, and Ba metals were separated from M–Sn alloys using vacuum distillation with a separation rate of >95.0%. We achieved a current efficiency of 81.0% for the electrolytic production of 100 kg of a liquid Na–Sn alloy, which holds promise to produce s-block metals at a large scale.
研究领域:
材料科学
·
化学工程
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INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2022
·Vol. 24
·期 1
·272
·
IF 6.208
Lei Chen,Yijia Yin,Linjia Jian,Xianglong Han,Xuefeng Zhao,Donghui Wang
Osteogenic and antibacterial abilities are the permanent pursuit of titanium (Ti)-based orthopedic implants. However, it is difficult to strike the right balance between these two properties. It has been proved that an appropriate alkaline microenvironment formed by Ti modified by magnesium–aluminum layered double hydroxides (Mg–Al LDHs) could achieve the selective killing of bacteria and promote osteogenesis. However, the existence of Al induces biosafety concerns. In this study, iron (Fe), an essential trace element in the human body, was used to substitute Al, and a calcinated Mg–Fe LDH film was constructed on Ti. The results showed that a proper local alkaline environment created by the constructed film could enhance the antibacterial and osteogenic properties of the material. In addition, the introduction of Fe promoted the Fenton reaction and could produce reactive oxygen species in the infection environment, which might further strengthen the in vivo bactericidal effect.Keywords:antibacterial;osteogenic;Mg–Fe layered double hydroxides;alkaline microenvironment;Fenton reaction
研究领域:
材料科学
·
生物材料
·
骨科
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PubMed
高影响因子
ELECTROCHEMISTRY COMMUNICATIONS
·
2017
·
IF 4.396
Huimin Xu,Zhonghua Zhang,Zili Cui,Aobing Du,Chenglong Lu,Shanmu Dong,Jun Ma,Xinhong Zhou,Guanglei Cui
Herein we present a strong anion receptor-assisted Mg-ion electrolyte, which is synthesized from tris(2H-hexafluoroisopropyl) borate (THFPB) and MgO in 1,2-dimethoxyethane (DME). The as-prepared borate magnesium oxide complex (BMOC) electrolyte delivers exceptional electrochemical performances, including extremely high anodic stability (up to 4.2 V vs. Mg), non-corrosivity to stainless steel and aluminium foils , and reasonable ionic conductivity of 1.74 × 10 − 4 S cm − 1 . In addition, by virtue of the non-nucleophilic characteristic of the BMOC electrolyte, S ||BMOC ||Mg cells have been assembled, which show a high stable discharge capacity of 1030 mAh g − 1 for 15 cycles and one well-defined voltage plateau of ≈ 1.1 V vs. Mg, yielding a desirable energy density beyond 1100 Wh kg − 1 based on the weight of sulfur in cathodes.
研究领域:
电化学
·
储能
·
材料科学
·
电池技术
·
无机化学
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Zan Jiang,Jianguang Yuan,Huanqing Han,Ying Wu
As an important member of complex hydrides , Mg(BH 4 ) 2 has a high gravimetric capacity (14.9 wt%). In this study, the Mg(BH 4 ) 2 was synthesized by the ion exchange method. Afterwards, the Mg(BH 4 ) 2 composites with different amounts (2, 5, 10, 25 and 50 wt%) of carbon nanotubes (CNTs) were prepared by mechanical milling. Effects of the CNTs on the microstructural evolution and hydrogen storage properties were investigated. The onset desorption temperature of the Mg(BH 4 ) 2 -5 wt% CNTs is decreased to lower temperature around 120 °C from 275 °C. The desorption plateau of Mg(BH 4 ) 2 -5 wt% CNTs is the highest, which ascribes that CNTs causes the reaction pathway change. Additionally, the Mg(BH 4 ) 2 -5 wt% CNTs shows the best dehydriding kinetics properties, and can desorb 6.04 wt% hydrogen within 2000 s at 300 °C. The dehydrogenation activation energy of the Mg(BH 4 ) 2 -5 wt% CNTs is decreased to 130.2 kJ/mol H 2 , which is much lower than that of pure Mg(BH 4 ) 2 .
研究领域:
材料科学
·
无机化学
·
能源材料
·
纳米材料
·
固态储氢
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高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Sikang Wei,Yang Xu,Shihong Tian,Zhaohui Han,Lei Xu
In this study, Al-Mg-Sn-Ga anode material prepared by heating up to 800 °C in microwave field under different powers and heating up to 800 °C in conventional field is compared. The microstructure and corrosion morphology of aluminum alloy anode are observed by electron backscatter diffraction(EBSD) and scanning electron microscopy(SEM), and Tafel polarization curve , electrochemical impedance spectroscopy (EIS) and constant current are characterized by different melting modes. The results are showed that microwave can change the grain orientation of aluminum alloy anode and corrosion forms, compared to the conventional technology, the microstructure of the alloy electrode material can grow preferentially at (001), improve alloy anode electrochemical properties , by pitting corrosion forms into a uniform corrosion , improves the corrosion resistance of the anode and the anode utilization. At the same time, aluminum alloy anode has excellent discharge performance under microwave 2000 W treatment. The energy density and capacity density are 2729.3 Wh·kg −1 and 2596.6 mAh·g −1 , respectively, which are 44.03% and 42.26% higher than those of conventional muffle furnace melting. Therefore, microwave technology can improve the electrochemical performance by affecting the microstructure of alloy materials.
研究领域:
材料科学
·
电化学
·
金属腐蚀与防护
·
能源材料
·
功能材料
·
冶金工程
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DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2017
·
IF 6.395
Minghong Huang,Liuzhang Ouyang,Jiangwen Liu,Hui Wang,Huaiyu Shao,Min Zhu
In this work, flower-like MoS 2 spheres are synthesized via a hydrothermal method and the catalytic activity of the as-prepared and bulk MoS 2 on hydrolysis of Mg is systematically investigated for the first time. The Mg-MoS 2 composites are prepared by ball milling and the hydrogen generation performances of the composites are investigated in 3.5% NaCl solution. The experimental results suggest that the as-prepared MoS 2 exhibits better catalytic effect on hydrolysis of Mg compared to bulk MoS 2 . In particular, Mg-10 wt% MoS 2 (as-prepared) composite milled for 1 h shows the best hydrogen generation properties and releases 90.4% of theoretical hydrogen generation capacity within 1 min at room temperature. The excellent catalytic effect of as-prepared MoS 2 may be attributed to the following aspects: three-dimensional flower-like MoS 2 architectures improve its dispersibility on Mg particles; make the composite more reactive; hamper the generated Mg(OH) 2 from adhering to the surface of Mg; and increase the galvanic corrosion of Mg. In addition, a hydrogen generator based on the hydrolysis reaction of Mg-0.2 wt% MoS 2 composite is manufactured and it can supply a maximum hydrogen flow rate of 2.5 L/min. The findings here demonstrate the as-prepared flower-like MoS 2 can be a promising catalyst for hydrogen generation from Mg.
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Arabian Journal of Chemistry
·
2015
·
IF 3.725
Shifeng Li,Yanming Shen,Min Xiao,Dongbin Liu,Lihui Fan
Controlled release formulations have been proven to have potential in overcoming the drawbacks of conventional plant growth regulators. Novel controlled-release formulation of β -naphthoxyacetic acid (BNOA) intercalated MgAl-layered double hydroxides (LDHs) was prepared by co-precipitation method. The effects of temperature, pH value, and release medium on BNOA release were studied and the releasing mechanisms were discussed. The results of release show that the increase of temperature induces the increase of BNOA release extent. The release rate and accumulated release amount of BNOA are found to be dependent to the anion in the aqueous solution in the order of CO 3 2− > SO 4 2− > Cl − . Moreover, the pH is the key controlling factor for the BNOA release processes, and with strong acid medium, the release character of BNOA is different from those at pH 7 and 12, which accompanies with fast collapse of LDHs nanolayered structure. The nanohybrid of BNOA intercalated LDHs possessed good controlled release properties and the BNOA release character from the nanohybrid fitted pseudo-second-order model in neutral medium.
研究领域:
材料科学
·
农业科学
·
植物生理学
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高影响因子
JOURNAL OF HYDROLOGY
·
2026
·
IF 6.3
Bowen Li,Tingting Yang,Shibin Liu,Meng Yao,Jun Dong
The uneven distribution of colloidal Mg(OH) 2 in heterogeneous porous media poses a significant challenge for its effective application in groundwater remediation. To address this issue, this study introduces a novel approach using xanthan gum (XG) as a viscosity modifier to enhance the migration of colloidal Mg(OH) 2 into low permeability zone. Results indicate that XG is highly compatible with colloidal Mg(OH) 2 , viscosity modified colloidal Mg(OH) 2 (VMC-Mg(OH) 2 ) exhibits significant shear thinning properties. The increased viscosity effectively reduces the deposition of colloidal Mg(OH) 2 and facilitates its return to groundwater. With the addition of XG to the system, the collision efficiency ( η ) between colloidal Mg(OH) 2 and porous media decreased from 0.00865 to 0.00142, while the attachment efficiency ( α ) was reduced from 0.4858 to 0.1038. These variations notably enhance the migration performance of colloidal Mg(OH) 2 , with C/C 0 increasing from 0.12 to 0.94. The incorporation of XG also leads to a substantial increase in colloidal Mg(OH) 2 sweep efficiency in low permeability zone, rising from 53.6 % to 92.5 % as the XG concentration increased from 0 mg/L to 200 mg/L. Moreover, the simulation of collision efficiency ( η ) and attachment efficiency ( α ) accurately predicts the migration of VMC-Mg(OH) 2 in heterogeneous porous media, with a maximum error of 5.39 %. These findings highlight the significant potential of VMC-Mg(OH) 2 as a reactive reagent for remediating contamination in low permeability zone
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高影响因子
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
·
2026
·
IF 2.6
Soliman Hanaa,Taieh Nabil Kadhim,Wan Guojiang,Hussien Hoda M.
Biodegradable magnesium is a promising orthopedic implant, but one challenge is reducing its corrosion rate. The first question that jumps to the reader’s mind is choosing an organic film or an inorganic one to isolate Mg. Here, a duplex-layer strategy has been studied: an organic film of hexamethylenediaminetetrakis (methylenephosphonic acid) HMDTMPA and two top layers of an inorganic film of TiO 2 or another organic film of stearic (St). A comparison will be carried out in light of SEM, AFM, EDS, XRD, XPS, FTIR, and water contact angle (WCA) measurements. Double layers of the organic film created more thickness (6.8 μm) but otherwise almost the same efficiency as a single film (4.3 μm), due to the same bonding ability of O-H and C-C, shifting the coating toward hydrophilicity attitude (57°). On the other hand, inorganic TiO 2 generates finer particles that are arranged compactly, facilitating denser packing (7.2 μm), reducing voidages on the surface and promoting hydrophobicity (146°) and consequently reinforcing Mg insulation. Graphical The alternative text for this image may have been generated using AI.
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Nature Communications
·
2026
·
IF 18.1
Yang Jiawei,Zhu Rui,Li Ming,Mei Zengxia,Chen Ling,Wu Li-Ming
Sustainable thermal management of high-heat-flux electronics beyond Moore’s Law requires micro thermoelectric coolers (μ-TECs) that are both high-performance and environmentally sustainable. However, state-of-the-art μ-TECs rely on Bi 2 Te 3 -based materials, whose tellurium scarcity, toxicity concerns and limited mechanical robustness hinder widespread adoption. Mg-based thermoelectric materials offer a promising alternative but remain challenging to integrate into microscale devices. Here we show that a low-temperature, water-free fabrication strategy enables tellurium-minimized μ-TECs based on n -type Mg 3 (Bi,Sb) 2 and p -type MgAgSb. Using magnetron sputtering as a cold bonding approach, we fabricate compact 12-pair microdevices (2.95 × 4.35 × 1.4 mm 3 ), with thermoelectric legs approximately 3% the size of previously reported Mg-based devices. The resulting μ-TECs achieve a power density of 4.34 W cm −2 and a packing density of 93.5 pairs cm −2 . Our work establishes a scalable route for sustainable thermoelectric cooling and a viable alternative to conventional Bi 2 Te 3 technologies.
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DOI
PubMed
高影响因子
Archives of Civil and Mechanical Engineering
·
2026
·Vol. 26
·期 3
·121
·
IF 4.9
Zhang Kaifei,Sun Youping,Li Wangzhen,He Jiangmei,Chen Wengang,He Chengwei
This study comprehensively investigated the influence of varied hot rolling temperatures on the microstructure, mechanical properties, and corrosion behavior of Mg-2Zn-0.1Ca alloy in a simulated physiological environment. Advanced characterization techniques, including Field Emission Scanning Electron Microscopy (FESEM) and Electron Backscatter Diffraction (EBSD), were employed for detailed microstructural analysis. Corrosion performance was systematically evaluated through mass loss, hydrogen evolution, and electrochemical polarization tests. Results indicate that increasing rolling temperature progressively enlarged the alloy’s grain size, peaking at 15.06 μm at 400 ℃. Concurrently, the degree of dynamic recrystallization (DRX) and the fraction of high-angle grain boundaries (HAGBs) exhibited a synchronized increase. Notably, the alloy rolled at 300 ℃ displayed the highest dislocation density, attributed to a significantly higher rate of dislocation multiplication than annihilation. The ultimate tensile strength (UTS) generally decreased with rising rolling temperature, with the 250 ℃ rolled specimen achieving the maximum UTS of 218.34 MPa. Conversely, the 300 ℃ rolled alloy exhibited superior elongation (EL) of 19.8%. The damping performance at room temperature exhibits a monotonically increasing trend with rising rolling temperature, with the alloy achieving optimal damping properties at 400 ℃. Regarding corrosion performance, at the 400 ℃ rolling process, the alloy’s corrosion rate is minimized. This superior performance is primarily attributed to its lower grain boundary density, more homogeneous microstructure, and the formation of a dense passive film on the surface, which synergistically impede further corrosive medium penetration.
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Nano-Micro Letters
·
2026
·Vol. 18
·期 1
·291
·
IF 38.5
Shi Yuan,Zhang Ziyi,Bai Lei,Li Dingding,Shi Jingbo,Yue Zongye,Yuan Tianyu,Bai Jinbo,Bai Jintao,Leng Kunyue,Li Xiaolin,Wang Xuejing,Qu Yunteng
Metal–nitrogen–carbon catalysts have emerged as promising alternatives to costly platinum group catalysts in fuel cells and metal–air batteries; however, further enhancement of their activity in both alkaline and acidic media is still required. Here, we present a FeMg–N–C dual-atom catalyst that demonstrates excellent oxygen reduction reaction (ORR) performance, achieving notably high half-wave potentials (E 1/2 ) of 1.004 V in alkaline media and 0.881 V in acidic media. Additionally, the FeMg–N–C catalyst delivers peak power densities of 530.1 mW cm −2 in Zn–air cells and 1.06 W cm −2 in H 2 –O 2 fuel cells. Experimental and theoretical analyses reveal that the enhanced ORR activity arises from the spin state transition of Fe sites from low spin to medium spin, induced by adjacent Mg sites. This medium-spin Fe site exhibits strong adsorption of *O 2 and weak adsorption of *OH, effectively facilitating the initial ORR step and the removal of *OH. This work paves a novel pathway to design and construct well-performing electrocatalysts via the spin regulation strategy.
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