Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Furong Jia,Yun Li,Hongfei Guo,Xueqing Chen,Jilin Cao
Currently, comprehensive utilization technology of seawater bittern faces several challenges, including low resource utilization efficiency, limited value of magnesium salt products, and high energy consumption. This study proposes an innovative approach to prepare high-purity MgO. This process begins with the reaction of brine with a mixed alkaline solution of NaOH-Na 2 CO 3 to synthesize basic magnesium carbonate (4MgCO 3 ·Mg(OH) 2 ·4 H 2 O). Subsequently, 4MgCO 3 ·Mg(OH) 2 ·4 H 2 O is transformed into a high-purity Mg(OH) 2 structure through the hydrothermal conversion method. Finally, high-purity MgO is obtained by calcining magnesium hydroxide. The effects of mixed alkali precipitation and hydrothermal reaction conditions on the structure, morphology, and purity of intermediate products and MgO are systematically investigated. The optimal conditions for preparing high-purity MgO are determined as follows: the molar ratio of Mg 2 + :CO 3 2− :OH − in seawater bittern to the NaOH-Na 2 CO 3 mixed alkali is 5:4.7:2, at a reaction temperature of 60 °C, stirring speed of 200 rpm, stirring time of 10 min, and reaction time of 35 min. Under these conditions, spherical 4MgCO 3 ·Mg(OH) 2 ·4 H 2 O is initially obtained. Subsequently, the 4MgCO 3 ·Mg(OH) 2 ·4 H 2 O underwent hydrothermal treatment at a solid-to-liquid ratio of 8:100 and a temperature of 120 °C. Polyethylene glycol (PEG) is added as a surfactant at 3 wt % of the solid content of 4MgCO 3 ·Mg(OH) 2 ·4 H 2 O, along with 5 g of NaOH (accounting for 62.5 wt %), for 2 h. This process yielded high-purity Mg(OH) 2 with a thin flake morphology. Finally, the high-purity Mg(OH) 2 is calcined at 500 °C for 4 h, resulting in cubic crystal nano-MgO with a purity of 99.8 % and an average particle size of approximately 30 nm.
研究领域:
材料科学
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化学工程
·
无机合成
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纳米技术
·
资源利用
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Yiwen Wang,Xiangyu Liu,Qingdong He,Hang Lu,Fang Guo,Yujie Zhang,Wenbo Wang
Producing clean water by the harmless treatment of complex wastewater containing oils and organic pollutants (e.g., dyes) is highly desirable, but the major challenge is the lack of a simple, effective and low-cost way to remove simultaneously heavy oil, light oil and dyes. Here, we designed and constructed a three-dimensional architecture (3D-A) composed of the hydrophilic or hydrophobic functionalized copper mesh (as the upper layer) and the sisal fiber felts (SFs) modified with Mg/Fe-LDH or magnesium silicate (MgSi) (as the bottom layer), and confirmed that clean water was produced through filtering complex wastewater with the 3D-A in one step. For heavy oil/dyes wastewater, the dye solution in it can be trapped by hydrophobic mesh, while heavy oils passed through the mesh. The heavy oils were collected, while the dye solution flows into the light oils/dye mixed solution for further separation. The hydrophilic mesh may trap light oils in light oil/dyes wastewater, and allow dye solution to penetrate the mesh by gravity with a stable high flux [>18000 L/(m 2 ·h)] and high oil–water separation efficiency of 99%. The light oils were collected, while the dye solution flows into the modified SFs layer. The Mg/Fe-LDH modified SFs and MgSi-modified SFs can capture above 99.9% of Congo red (CR) and Methylene blue (MB) dyes, respectively to obtain clean water, and each kilogram of Mg/Fe-LDH@SFs and MgSi@SFs adsorbents can treat 9400 and 18000 kg dye wastewater, respectively. The meshes are very stable and antifouling, and can resist acid and alkaline condition (pH 1 ∼ 13), as well as mechanical scratch. The 3D-A also shows high efficiency in purifying real oily emulsion wastewater from the iron and steel industry to produce clean water, and the used SFs can be easily regenerated for cyclic use in purification of dye wastewater.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
DOI
高影响因子
Nano-Micro Letters
·
2024
·Vol. 16
·期 1
·1-13
·
IF 31.6
Chen Fuyu,Zhao Bai-Qing,Huang Kaifeng,Ma Xiu-Fen,Li Hong-Yi,Zhang Xie,Diao Jiang,Yue Jili,Huang Guangsheng,Wang Jingfeng,Pan Fusheng
MVOH/rGO cathode with dual defect of Mg 2+ pre-intercalation defect (P-Mg d ) and surface oxygen defect (O d ) is prepared.
The dual defect of O d and P-Mg d in MVOH/rGO lamellar structure effectively enhances Mg 2+ migration kinetics, structural stability, and electronic conductivity.
The Mg foil//MVOH/rGO full cell achieves an ultralong lifespan of 850 cycles at 0.1 A g −1 and powers an orange light-emitting diode.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Wen Ren,Di Wu,Yanna NuLi,Xuan Zhang,Jun Yang,Jiulin Wang
The electrolyte based on magnesium bis(diisopropyl)amide (MBA), a low-cost and non-nucleophilic organic magnesium salt, is proposed to be an admirable alternative for rechargeable magnesium batteries but suffers from limited ionic conductivity and an inferior electrochemical window in the commonly used ether solvents. In this work, the 1-butyl-1-methylpiperidinium bis(trifluoromethyl sulfonyl)imide (PP14TFSI) ionic liquid as the cosolvent of tetrahydrofuran (THF) in chlorine-free MBA-based electrolytes has been first demonstrated to remarkably improve the ionic conductivity and broaden the oxidative stable potential (2.2 V vs Mg/Mg2+) on stainless steel. Reversible Mg electrochemical plating/stripping with a low overpotential below 200 mV and ca. 90% Coulombic efficiency are obtained. The current density of Mg plating/stripping is increased 238 times after the addition of PP14TFSI, where the mechanism of competitive coordination of TFSI– making an easier Mg plating/stripping is proposed theoretically. The MBA-2AlF3 electrolyte with a ratio-optimized THF/PP14TFSI cosolvent exhibits good compatibility with the Mo6S8 cathode. Furthermore, the Se@pPAN|Mg full cell exhibits an initial capacity of 447.8 mAh g–1 and as low as ∼0.66% capacity decay per cycle for more than 70 cycles at 0.2 C with the synergy of LiTFSI additives. The facile modification strategy of ionic liquid in the MBA-based electrolyte sheds inspiring light on exploring non-nucleophilic and chlorine-free electrolytes for practical rechargeable magnesium batteries.
研究领域:
材料科学
·
电化学
·
储能技术
·
电池技术
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无机化学
·
物理化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Guolang Zhou,Xiaoliang Gao,Shizheng Wen,Xinglong Wu,Lili Zhang,Tianshi Wang,Pusu Zhao,Jingzhou Yin,Wenshuai Zhu
Rational design of layered double hydroxide (LDH) electrodes is of great significance for high-performance supercapacitors (SCs). Herein, ultrathin cobalt-nickel-magnesium layered double hydroxide (CoNiMg-LDH) nanosheets with plentiful oxygen vacancies are synthesized via sacrificial magnesium-based replacement reaction at room temperature. Self-doping and mild reduction of magnesium can significantly increase the concentration of oxygen vacancies in CoNiMg-LDH, which promotes the electrochemical charge transfer efficiency and enhances the adsorption ability of electrolytes. Density functional theory (DFT) calculations also indicate that Mg 2+ doping can decrease the formation energy of oxygen vacancies in CoNiMg-LDH nanosheets, which increases the concentration of oxygen vacancies. Thus, the assembled asymmetric supercapacitor CoNiMg-LDH//Actived Carbon accomplishes a superior capacity of ∼ 333 C g −1 (208 F g −1 ) at 1 A g −1 and presents a gravimetric energy density of 73.9 Wh kg −1 at 0.8 kW kg −1 . It presents only 13% capacity loss at 20 A g −1 after 5000 cycles. This discovery emphasizes the positive role of magnesium in regulating oxygen vacancies to improve the performance of supercapacitors, which should be beneficial for extending the scope of superior SCs active materials.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
PubMed
高影响因子
Journal of Materials Chemistry B
·
2015
·Vol. 3
·期 39
·7775-7786
·
IF 4.726
Chao Qi,Ying-Jie Zhu,Feng Chen,Jin Wu
Magnesium whitlockite (WH: Ca18Mg2(HPO4)2(PO4)12), as an abundant and biologically important biomineral in living bone, is unfortunately difficult to synthesize. Herein, we report a microwave-assisted rapid synthesis of single-phase WH hollow porous microspheres and highly stable amorphous calcium magnesium phosphate (ACMP) porous microspheres by using creatine phosphate (CP) biomolecules as a biocompatible organic phosphorus source. The crystal phase and morphology of the product can be adjusted by the Ca/Mg molar ratio in the initial reaction solution, and CP biomolecules play an important role in the synthesis of the product. The as-synthesized WH hollow porous microspheres and ACMP porous microspheres have high biocompatibility and excellent ability to promote the adhesion and spreading of MC-3T3 osteoblasts. Moreover, WH hollow porous microspheres and ACMP porous microspheres are efficient at the loading and release of the anticancer drug doxorubicin, and exhibit slow, sustainable and pH-responsive drug release behavior. The high drug loading capacity (753 mg g−1) and drug encapsulation efficiency (more than 94%) render the ACMP porous microspheres an appealing carrier for anticancer drug delivery to enhance long-term chemotherapeutic efficacy.
研究领域:
材料科学
·
生物医学工程
·
药学
✓ 已验证
DOI
PubMed
高影响因子
Journal of Physical Chemistry C
·
2021
·
IF 4.126
Joshua Adedeji Bolarin,Zhao Zhang,Hujun Cao,Zhi Li,Teng He,Ping Chen
This paper seeks to present notable insights into the catalytic behavior of a ferroelectric BaTiO3 nanomaterial at the boundary plane in the separation of MgH2 starting from 185 °C. The synergy between mechanical milling and enhanced electronic distribution at the surface of BaTiO3 aided magnesium to a remarkable absorption of 4.5 wt % H2 at room temperature under 30 bar within 20 h. The composite released H2 ∼ 5.7 wt % in 15 min at 310 °C and ∼5.1 wt % in 90 min at 250 °C. The lowered activation energy of decomposition was calculated to be ∼60 kJ/mol with a decomposition enthalpy of 72.3 kJ/mol-H2. The composite reversibly produced ∼5.7 wt % H2 across 20 cycles in less than 120 h at 300 °C. As revealed by detailed experimental results, the interplay between +4 and +3 states of titanium at “111” twin boundaries of BaTiO3, and the formation of oxygen vacancies, play an important role in improving the sorption kinetics and the reversibility of Mg/MgH2. Meanwhile, the anomalous ferroelectric character of the +2 state of barium around Ti–O and Mg after milling of BaTiO3 is also believed to slightly enhance MgH2 desorption enthalpy via a chemisorption process. Our findings have brought MgH2 a few steps closer to practical applications.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
·
2024
·
IF 2.4
Zhu Liguo,Zhang Zuqing,Kong Lingxin,Wang Chengyuan,Yang Bin,Xu Baoqiang
Ti is produced by the Kroll method, mainly by carbothermic chlorination, magnesiothermic reduction, and vacuum distillation, which result in complex processes, low efficiency, and high cost. Although Ti has many excellent properties, its high production costs limit its widespread applications. There is an urgent need to develop new Ti extraction processes to reduce the cost of Ti production. In this study, we propose a new method for the direct preparation of low-oxygen Ti powder from TiO 2 using Mg as a reducing agent and the formation of CeOCl (2Mg ( l ) + TiO 2 ( s ) + 2CeCl 3 ( l ) = Ti ( s ) + 2CeOCl ( s ) + 2MgCl 2 ( l )). First, a deoxidization experiment of Ti with Mg as a deoxidizer was conducted, and the ability of Mg to deoxidize Ti was demonstrated. At 1273 K, when the activity of CeCl 3 was 1, the oxygen concentrations of Ti-A and Ti-B were 380 and 270 ppm, respectively. Subsequently, the TiO 2 reduction experiment was conducted using Mg as the reducing agent. The results showed that MgO activity was effectively reduced by the formation of CeOCl (MgO( s ) + CeCl 3 ( l ) = MgCl 2 ( l ) + CeOCl( s )). When the system reached the Mg/MgCl 2 /CeOCl/CeCl 3 equilibrium, low-oxygen Ti powder below 1000 ppm was directly produced from TiO 2 .
研究领域:
材料科学
·
冶金工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Xueqin Zhu,Minjian Yang,Chunnian Zheng,Qin Zhu,Zhili Cui,Piaopiao Zhang
Exploiting magnesium-based hydrogen storage materials faces great challenges due to their inherent thermodynamic and kinetic characteristics. However, this issue can be mitigated by employing a catalyst doping modification strategy. In this work, a composite of titanium carbide (Ti 3 C 2 T x MXene)-supported nickel fluoride (NiF 2 ) nanoparticles, known as NiF 2 @Ti 3 C 2 , was fabricated via the hydrothermal approach and utilized to reinforce the hydrogen storage performance of magnesium (Mg). It was shown that NiF 2 @Ti 3 C 2 composites have exceptional catalytic properties for Mg hydrogen storage. The Mg–NiF 2 @Ti 3 C 2 composite, containing 5 wt% of NiF 2 @Ti 3 C 2 , released 3.46 wt% of hydrogen at 300 °C, while pure Mg produced essentially little hydrogen in identical conditions. Additionally, there was a decrease in the activation energy of hydrogen desorption from 135.4 to 77.65 kJ mol −1 . Moreover, the composite offered excellent stability and reversible performance, achieving 95.8% capacity retention after 10 consecutive testing cycles. During the hydrogen uptake and release process, the NiF 2 @Ti 3 C 2 composite interacted with Mg/MgH 2 to produce the metals Ti 0 , MgF 2 , and Mg 2 Ni/Mg 2 NiH 4 , which acted as active species to boost the hydrogen storage performance of Mg.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Lingxiao Luo,Xiaofang Yang,Zhipeng Gao,Xiaomei Li,Junyao Xu,Yongfeng Zhang,Rongrui Deng,Guangsheng Huang,Jingfeng Wang,Fusheng Pan
Rechargeable magnesium batteries (RMBs) have garnered significant attention in the field of energy storage. However, the use of a traditional electrolyte, Mg(TFSI) 2 /DME, leads to the passivation of the Mg metal anode (MMA), limiting the reversible deposition and dissolution process of Mg 2+ . Consequently, we propose a feasible method to modify the MMA, resulting in the formation of an artificial solid-electrolyte interface (SEI) coating rich in MgBr 2 , MgI 2 and Sb. This modification leads to substantial improvements in the interfacial kinetics and electrochemical properties of MMA, effectively suppressing the passivation reaction and significantly reducing the overpotential from 2 V to 0.3 V. Upon incorporating CuS/VS 4 cathode materials with a 0.15 M SbBr 3 modification, the discharge capacity reached 125 and 191 mAh·g −1 , respectively (compared to the initial capacity of 30 and 98 mAh·g −1 ) after 30 cycles. Similarly, with a 0.8 M SbI 3 modification, the battery exhibited capacities of 220 and 240 mAh·g −1 , respectively. Through a combination of experimental and computational analyses, we confirmed the uniform distribution of Sb, MgBr 2 and MgI 2 on the MMA surface and a substantial decrease in the diffusion barrier of Mg 2+ . This study presents a straightforward and efficient method for constructing an artificial SEI coating.
研究领域:
材料科学
·
电化学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2023
·Vol. 16
·期 18
·6248
·
IF 3.4
Yan Zhou,Dongsheng Wang,Youwen Yang
Biodegradable magnesium (Mg) and its alloys show tremendous potential as orthopedic materials. Nevertheless, the fast degradation and insufficient osteogenic properties hinder their applications. In this study, mesoporous bioglass (MBG) with an ordered branch-like structure was synthesized via a modified sol–gel method and showed a high specific surface area of 656.45 m2/g. A Mg-based composite was prepared by introducing the MBG into a Mg matrix via powder metallurgy. Degradation tests showed that the introduction of MBG increased the adsorption sites for Ca and P ions, thus promoting the formation of a Ca-P protective layer on the Mg matrix. The Ca-P protective layer became thick and dense with an increase in the immersion time, improving the protection ability of the Mg matrix, as proven by electrochemical impedance spectroscopy measurements. Meanwhile, the Mg-based composite also exhibited excellent biocompatibility and osteogenic properties. This study demonstrated the advantages of MBG in the preparation of Mg-based bone implants and validated the feasibility of improving Mg matrix corrosion resistance and enhancing osteogenesis by introducing MBG.Keywords:biodegradable magnesium alloy;corrosion resistance;in situ deposition;Mg-based composite;mesoporous bioglass;osteogenesis
研究领域:
生物医学工程
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
ENERGY
·
2017
·
IF 4.52
J. Yan,C.Y. Zhao,Z.H. Pan
Cyclic stability is a key factor in the design of thermochemical heat storage systems . Because carbon dioxide (CO 2 ) may react with heat storage materials and lead to a decrease in energy storage efficiency, the effect of CO 2 on Ca(OH) 2 /CaO and Mg(OH) 2 /MgO systems is investigated in this study. The experimental results show that CO 2 reacts with CaO in the water vapor that appears during the heat release process. Therefore, in the design of Ca(OH) 2 /CaO systems, CO 2 should be cleared from the system. The results from Mg(OH) 2 /MgO systems show that CO 2 only slightly reacts with MgO and Mg(OH) 2 during heat storage and release processes. This study indicates that carbonic acid (H 2 CO 3 ) could easily react with CaO/Ca(OH) 2 to form CaCO 3 during heat release processes. Generally, the remaining CO 2 reduces the reversibility of Ca(OH) 2 /CaO systems but has only a slight influence on Mg(OH) 2 /MgO systems. In addition, the experimental results show that carbonate shell does not exist in rehydration for both of the CaO/MgO samples, but the influence of CO 2 on the entire process increases after each cycle.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）