Gas Science and Engineering
·
2023
·
IF 0
Guanhua Zhang,Shaocong Mo,Hongtao Xu,Xiaoyu Yan,Binlin Dou,Guomin Cui,Qiguo Yang,Wei Lu
Metal-organic frameworks (MOFs) are popular crystalline materials owing to their high porosity, tunable pore structure, and large surface area. By introducing a carboxylic acid to compete with 2,5-dihydroxyterephthalic acid for magnesium ions in solution, a crystal defect method was used to prepare multi-level pore Mg-MOF-74 with an unregular framework structure of Mg-MOF-74 in this paper. In the prepared samples, the adsorption amounts varied in descending order with various carboxylic acid species: Mg-MOF-74-Propionic acid (37.95 cm 3 /g STP) > Mg-MOF-74 (15.46 cm 3 /g STP) > Mg-MOF-74-Acetic acid (9.19 cm 3 /g STP) > Mg-MOF-74-Formic acid (7.81 cm 3 /g STP). At 1.5 kPa, the CO 2 adsorption of 2,5-dihydroxyterephthalic acid and propionic acid with a ratio of 2:1 can reach 2.78 cm 3 /g STP (standard temperature and pressure) with the comparison to 0.47 cm 3 /g STP of pristine Mg-MOF-74. Under atmospheric pressure, the adsorption capacity of modified Mg-MOF-74 can reach 37.95 cm 3 /g STP, equivalent to 2.45 times of the original Mg-MOF-74.
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DOI
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Zhihong Cui,Peng Chen,Yuping Liu,Lu Zhang,Jingna Nie,Bo Shang,Changguo Chen,Guangsheng Huang,Dingfei Zhang,Fusheng Pan
Rechargeable magnesium batteries (RMBs) are considered as a potential rechargeable for replacing or assisting lithium metal batteries (LMBs). The Mg anode is prone to experiencing a native oxide layer in most electrolytes, resulting in an inferior overpotential and irreversible Mg plating/stripping behavior. Herein, we report for the first time that a novel Mg battery can be assembled using a non-nucleophilic Mg(HMDS)2-based electrolyte with I2 in a relatively large solvent molecule diglyme. An artificial interface phase of MgI2 was constructed in Mg(HMDS)2-AlCl3 electrolyte through the reaction of oxidant I2 and reductant Mg foil. This artificial interface phase is less sensitive to the electrolyte composition. The electrolyte decomposition and the Mg side reaction are effectively inhibited by the MgI2 interphase. In-situ MgI2 interphase significantly lessens the interface impedance and overpotential of the electrochemical Mg deposition/dissolution process. More importantly, the overpotential of the cell using Mg(HMDS)2-2AlCl3- I2/G2 electrolyte is decreased to 0.10 V vs Mg2+/Mg with high Coulombic efficiency of ∼99%, which is superior to the recently reported Mg(HMDS)2-based electrolytes. Besides, the first-principles calculations demonstrate that Mg is uniformly deposited on the MgI2 surface due to reversible Mg plating/stripping, low overpotential, and long-term cycle performance. Note that the as-fabricated novel Ni0.6Co0.4Se2|Mg(HMDS)2-AlCl3- I2/G2|Mg full battery delivers an initial specific capacity of 186 mAh g–1, and retains 120 mAh g–1 with Coulombic efficiency of 100% after 100 cycles. The novel Mg battery verifies the availability of the Mg(HMDS)2-AlCl3- I2/G2 electrolyte through electrolyte additive engineering. The high capacity and stable as-assembled Mg//Ni0.6Co0.4Se2 full cell confirms the compatibility of Mg(HMDS)2 and I2 as well as the utility of modified electrolyte and diselenides cathode materials in RMBs.
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DOI
高影响因子
Small Methods
·
2023
·
IF 12.4
Xuejun Zhou,Guyue Li,Yifan Yu,Meng Lei,Keyi Chen,Chilin Li
Magnesium metal batteries (MMBs) currently face challenges suffering from severe Mg metal passivation and extremely high overpotential in conventional electrolytes. Herein, a strategy of using a low-cost deep eutectic solution (DES) is proposed to modify Mg anode with the monolithic and compact coating of a MgCl 2 -Al-MgCl 2 sandwich structure, enabling the stable and reversible Mg plating–stripping behavior. An organic/nanocrystal hybrid interphase is in-situ built through a facile Mg-Al displacement reaction between aluminum-chloro clusters and Mg in AlCl 3 /Et 3 NHCl solution, and it can effectively minimize the adverse interfacial passivation reaction and surface diffusion barrier, affording the high ion-conduction and electronic insulation. This DES-assisted method guarantees a highly reversible cycling of Mg metal anode (over 5000 h at 0.1 mA cm −2 and 400 h at 2.0 mAh cm −2 ) in Mg(TFSI) 2 /DME electrolyte with the improved interfacial kinetics and low overpotential. Even at a much higher current density of 1 mA cm −2 , the overpotential only undergoes a slight increase from 0.2 V (at 0.1 mA cm −2 ) to 0.23 V. The corresponding full cells with CuS and phenanthraquinone cathodes deliver satisfactory cyclic performance. The DES modification strategy provides a new solution to the design of robust and conductive solid electrolyte interphase for achieving high-voltage and durable MMBs.
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Xuancheng Wang,Xuezhang Xiao,Jiaguang Zheng,Zhouming Hang,Wenping Lin,Zhendong Yao,Meng Zhang,Lixin Chen
Magnesium borohydride , Mg(BH 4 ) 2 , is ball-milled with Ti nano-particles. Such catalyzed Mg(BH 4 ) 2 releases more hydrogen than pristine Mg(BH 4 ) 2 does during isothermal dehydrogenation at 270, 280, and 290 °C. The catalyzed Mg(BH 4 ) 2 also exhibits better dehydrogenation kinetics than the pristine Mg(BH 4 ) 2 . Based on kinetics model fitting, the activation energy ( E a ) of the catalyzed Mg(BH 4 ) 2 is calculated to be lower than pristine Mg(BH 4 ) 2 . During partial dehydrogenation , the catalyzed Mg(BH 4 ) 2 releases 4.23 wt % (wt%) H 2 for the second dehydrogenation at 270 °C, comparing to 4.05, and 3.75 wt% H 2 at 280, and 290 °C. The reversibility of 4.23 wt% capacity is also one of the highest for Mg(BH 4 ) 2 dehydrogenation under mild conditions such as 270 °C as reported. 4 cycles of Mg(BH 4 ) 2 dehydrogenation are conducted at 270 °C. The capacities degrade during 4 cycles and tend to be stable at about 3.0 wt% for the last two cycles. By analyzing the hydrogen de/absorption products of the catalyzed sample, Mg(BH 4 ) 2 is found to be regenerated after rehydrogenation according to Fourier Transform Infrared (FTIR) spectroscopy. Ti nano-particles can react with Mg(BH 4 ) 2 during ball-milling and de/rehydrogenation. The products include TiH 1.924 , TiB, and TiB 2 , which can improve the dehydrogenation properties of Mg(BH 4 ) 2 from a multiple aspect.
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DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2021
·
IF 6.789
Ziyi Shen,Jie Jin,Jingjing Fu,Meng Yang,Feihu Li
The co-occurrence of arsenic and fluoride in the water environment has led to many health concerns for living beings. Simultaneous removal of such ions is crucial to the safety of water resources , and biochar has been extensively engaged to address this issue. Here four magnetic biochars (mBCs) including pristine magnetic biochar and three aluminum (Al) and/or magnesium (Mg) oxides-anchored magnetic biochar (i.e., Al-mBC, Mg-mBC, and MgAl-mBC) were prepared via a facile pyrolysis method and then comprehensively evaluated as adsorbents for enhanced co-uptake of arsenate (As V ) and fluoride (F − ) from synthetic water. The mBC shows a high specific surface area of 205 m 2 g −1 , which dropped to 116, 80, and 114 m 2 g −1 upon the anchoring of Al, Mg, and Mg + Al, respectively. Our results suggest that the adsorption of either As V or F − is highly pH-dependent, and pH 4–6 is the optimal range for maximum adsorption. The adsorption isotherm data indicate that the MgAl-mBC adsorbent outranks all other mBCs for co-uptake of both As V and F − . The adsorption capacity maxima of MgAl-mBC are 34.45, and 21.59 mg g −1 for As V and F − , respectively (pH = 5, T = 10 °C), also highly outstripping other biochars reported in the literature. The magnetic feature of these mBCs enables us to fast reclaim and regenerate the exhausted adsorbents by an external magnet and dilute NaOH. The Al- and Mg-anchored mBCs are expected to be used as highly efficient adsorbents for environmental remediation of waters contaminated by both As V and F − .
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Jiaguang Zheng,Xuancheng Wang,Xuezhang Xiao,Hao Cheng,Liuting Zhang,Lixin Chen
Two dual-cation transition metal fluorides K 2 TiF 6 and K 2 NbF 7 are introduced into Mg(BH 4 ) 2 by ball-milling to catalyze the dehydrogenation of Mg(BH 4 ) 2 . According to the DSC and TPD results, the onset dehydrogenation temperature of Mg(BH 4 ) 2 doped with K 2 TiF 6 and K 2 NbF 7 are remarkably reduced to 105.4 and 118.0 °C, respectively. Meanwhile, both the K 2 TiF 6 and K 2 NbF 7 catalyzed systems can release more than 6.4 wt% H 2 under 280 °C, showing an improvement in dehydrogenation kinetics. In addition, the reversible capacity of the Mg(BH 4 ) 2 –3%K 2 TiF 6 system is 2.7 wt% at 280 °C in 250 min, which is enhanced comparing to that of pristine Mg(BH 4 ) 2 . X-ray diffraction, Fourier-transformed infrared and 11 B nuclear magnetic resonance investigations reveal that the K 2 TiF 6 actually acts as a catalytic precursor to react with Mg(BH 4 ) 2 , forming active hydrides of KBH 4 and TiH 2 , which further serve as catalyzing agents to facilitate the re-generation of Mg(BH 4 ) 2 from intermediates under moderate conditions.
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DOI
高影响因子
Journal of the Australian Ceramic Society
·
2019
·Vol. 56
·期 2
·795-801
·
IF 0.692
Zhang Tao,Wei Yaowu,Chen Junfeng,Li Nan
In spite of the advantages of CaO refractories, such as high refractoriness, potential to produce pure steel molten, and high alkaline corrosion resistance, their application has been limited due to its poor hydration resistance. Introducing additives to improve the hydration resistance of lime is a novel method. The influences of Mg(OH) 2 and sintering temperatures on the sintering and hydration resistance of CaO aggregates that were produced by thermal decomposition were investigated in this paper. The purpose of this work was to produce high-purity CaO raw material with high density, low porosity, well grain growth, and good hydration resistance economically. The sintered samples were characterized by bulk density, apparent porosity, surface appearance, and microstructure. The results indicated that (1) Mg(OH) 2 promoted the grain growth of CaO, reduced the apparent porosity, and improved the density of the specimens. The hydration resistance of the samples was increased. (2) Increasing the sintering temperature improved the hydration resistance of the specimens obviously in the experiment. (3) Grain size of CaO was more uniform with the increment of Mg(OH) 2 content, and the density of the compacts was improved.
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Tong Zhang,Qiaoying Wang,Bingbing Zhang,Zhichao Wu,Zhiwei Wang
Inspired by the simultaneous increase of permeability and selectivity by introducing nanobubbles by physical methods, this study firstly proposed a in situ chemical nanobubbles controlled guanidyl-incorporated double layer nanofiltration (NF) membrane for Mg/Li separation in salt-lake brine. As a bridge, 1,3-diaminoguanidine released nanobubbles rapidly and uniformly by pH control while polymerizing with trimesoyl chloride (TMC) during interfacial polymerization, followed by polyethyleneimine (PEI) secondary reaction, which effectively changed the solute transportation to obtain the shortest pathways in horizontal and normal directions. Compared with conventional PEI-TMC membrane, the water flux of guanidyl-incorporated PEI (G-PEI) membrane was obviously increased by 54.28% while separation factor of Li/Mg ( S Li/Mg ) enhanced by 63.27% in the initial 1 h, indicating chemical nanobubble interlayer effectively broke Trade-off effect by increasing the effective filtration area. In the long-term operation, G-PEI-NF membrane exhibited an excellent S Li/Mg of >60, low mass rate of Mg 2+ and Li + (MLR) of 0.31 and Li + purity of >75% with the stable flux of 19–20 L/(m 2 ·h). This study expected to provide a novel chemical nanobubble interlayer NF membrane with high filtration performance for Mg/Li separation in salt-lake brine.
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DOI
高影响因子
Journal of Materiomics
·
2025
·
IF 9.6
Kui Xue,Min Xing,Tiantian Chen,Bingyun Xi,Haifeng Zhang,Kuicai Ye,Jiayin Feng,Wenhao Qian,Jiajun Qiu,Xuanyong Liu
For alveolar bone defects, magnesium membrane with the mechanical properties of shielding fibrocyte growth and sustainable release of Mg 2+ is an excellent choice for guide bone regeneration (GBR) surgery. However, insufficient osteogenesis and bacterial infection have hindered its application. In this study, Mg-Ga-LDH coating was successfully prepared, which delayed the degradation rate of the Mg membranes and greatly reduced the amount of hydrogen evolution. A weakly alkaline microenvironment (pH =8.5) containing appropriate concentrations of Mg 2+ and Ga 3+ was successfully constructed, effectively promoting the adhesion and proliferation of MC3T3-E1 cells. It also upregulated the expression of alkaline phosphatase and collagen, which were conducive to the formation of mineralized nodules, and promoted the osteogenic differentiation of rat bone marrow mesenchymal stem cells in vitro . In addition, Ga 3+ released from the coating and the generated alkaline microenvironment showed good antibacterial properties against S. aureus . The Mg-Ga-LDH coating can effectively reduce the degradation rate of Mg membranes and mitigate inflammation. The Mg-Ga-LDH coating modified Mg membrane promoted new bone formation in cranial defect animal models. This bone-promoting Mg 2+ and Ga 3+ releasing platform and weak alkaline microenvironment creation system paves the way for the application of Mg membranes in the field of GBR.
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Tao Li,Weikun Sun,Jian Zhang,Shengqin Liu,Hongbin Chen,Zumin Qiu,Jason Chun-Ho Lam
Herein, an efficient and stable catalyst of Co 3 O 4 @LDH-AC was innovatively prepared through uniform loading of an activated carbon substrate with Mg/Al layered double hydroxide (Mg/Al-LDH) followed by dispersing Co 3 O 4 nanoparticles in the confined space of LDH. This unique flower-like spherical structure significantly improved the adsorption capacity and would increase the concentration of reactants in the confined space. Experimental results showed that levofloxacin (LFX) completely degraded in 4 min with the addition of µM peroxymonosulfate (PMS). The fast conversion of Co 2+ and Co 3+ in catalyst for the generation of highly reactive species is revealed via EPR, in-situ Raman, in-situ FT-IR, and XPS. Further tests of 5Co 3 O 4 @LDH-AC in effluent of hospital wastewater treatment showed that it not only possessed strong anti-interference capabilities, but also maintained stable catalytic activity in fixed-bed reactor for a long operation time. Therefore, the excellent catalytic performance in confined space offers the possibility of application for the degradation of micropollutants in real pharmaceutical wastewater discharged from hospital (800–1200 tons/day, COD > 150 mg/L).
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产品关联
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2025
·
IF 4.6
Haoyue Deng,Tiehu Li,Hao Li,Alei Dang,Yongkang Han
In this study, a composite material composed of Mg-MOF-74 and graphene oxide (GO) was synthesized to overcome MOFs’ limitations in CO 2 capture. At 273 K/101 kPa, the Mg-MOF-74 composite containing 6 wt% GO achieved 3.46 mmol/g CO 2 uptake and 114.4 CO 2 /N 2 selectivity, demonstrating 25.8 % and 29.3 % enhancements compared with pristine Mg-MOF-74. This enhancement is due to the optimization of CO 2 adsorption by the new pores formed at the interface and the strong affinity of GO functional groups for CO 2 molecules. Furthermore, due to the excellent properties of GO and its strong interaction with Mg-MOF-74, the composites show notable improvements in thermal, adsorption–desorption cycling, and moisture stability. Notably, the Mg-MOF-74 composite containing 6 wt% urea-modified GO exhibits optimal CO 2 adsorption/stability. This is not only due to the synergy between GO and Mg-MOF-74, but also because the amine groups and polar C O bonds in urea can boost adsorption/separation and enhance stability through amine-Mg 2+ coordination. These findings highlight Mg-MOF-74@GO composites as promising candidates for industrial CO 2 capture.
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产品关联
DOI
高影响因子
BIOELECTROCHEMISTRY
·
2018
·
IF 3.789
Qiang Yuan,Y. Huang,Debao Liu,Minfang Chen
Biodegradable beta-tricalcium phosphate (β-TCP) particle reinforced magnesium metal matrix composites (Mg-MMC) have attracted increasing interest for application as implant materials . This investigation was conducted to study the effect of cooling rate on the microstructure and corrosion behavior of a biodegradable β-TCP/Mg-Zn-Ca composite. The composite was fabricated under a series of cooling rates using a wedge-shaped casting mold. The microstructure of the composite was examined by optical and scanning electron microscopy, and the corrosion behavior was investigated using an electrochemical workstation and immersion tests in a simulated body fluid (SBF). Faster cooling rates were shown to refine the secondary phase and grain size, and produce a more homogenous microstructure. The refined microstructure resulted in a more uniform distribution of β-TCP particles, which is believed to be beneficial in the formation of a stable and compact corrosion product layer, leading to improved corrosion resistance for the composite.
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DOI
高影响因子
危险品化学品经营许可证（带存储）