JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
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2016
·Vol. 31
·期 6
·1211-1218
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IF 0.4
Zhang Dan,Zhao Guoqing,Yu Jingang,Yan Tao,Zhu Mingyue,Jiao Feipeng
Adsorption of 2, 4, 6-trichlorophenol (TCP) onto the calcined Mg/Al-CO 3 layered double hydroxide (CLDH) was investigated. The prepared Mg/Al-CO 3 layered double hydroxide (LDH) and CLDH were characterized by powder X-ray diffraction (XRD) and thermo gravimetric analyzer-differential scanning calorimeters (TG-DSC). Moreover, 2,4,6-trichlorophenol (TCP) was removed effectively (94.7% of removal percentage in 9 h) under the optimized experimental conditions. The adsorption kinetics data fitted the pseudo-second-order model well. The Freundlich, Langmuir, and Tempkin adsorption models were applied to the experimental equilibrium adsorption data at different temperatures of solution. The adsorption data fitted the Freundlieh adsorption isotherm with good values of the correlation coefficient. A mechanism of the adsorption process is proposed according to the intraparticle diffusion model, which indicates that the overall rate of adsorption can be described as three steps.
研究领域:
环境科学
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化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
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2019
·
IF 2.291
Zhenying Liu,Shuai Ma,Xiao Li,Hu Yang,Zhenliang Xu
New porous carbonaceous materials are anticipated in the energy storage and environmental application. In the present study, a new carbonaceous composite with hierarchically porous structure was prepared from Mg(OH) 2 pre-filled PAN based membrane for the first time. The obtained carbonaceous composite contains 54.1% C, 26.8% O, 6.2% N and 5.6% Mg. Afterwards, the composite was tested as a supercapacitor and dye adsorbent. Its special capacitance reached 278 F/g at the scan rate of 0.5 A/g, and 186 F/g at the scan rate of 50 A/g, which outperforms most of supercapacitors obtained from the same precursor. A good cycling stability (98% in 5000 cycles) and a high power density (about 7000 W/kg) are achieved. As a dye adsorbent, the composite shows a high MO adsorption capacity of 1170 mg/g, much higher that of the active carbons. These results indicate an effective method to prepare new carbonaceous materials or to treat those disfunctional membranes.
研究领域:
材料科学
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能源存储
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Lin Zhang,Juanjuan Qi,Haiyang Zhang,Lei Xing,Zhanqi Zhou,Renchan Lei,Bo Li,Hui Liu,Lidong Wang
Dimethylamine (DMA), a widely used organic solvent and famous malodorous volatile organic compound (VOC), is easily released into the atmosphere and harms human health. Here, we designed a bifunctional CoFe/Mg mixed metal oxide (MMO) catalyst for activating peroxymonosulfate (PMS) to degrade aqueous DMA, thereby inhibiting DMA re-emission. The results indicated that the DMA (100 mg/L) degradation efficiency exceeded 90% within 80 min. Moreover, the re-emission of DMA into the atmospheric environment was reduced by 80% after catalysis. Electron paramagnetic resonance (EPR) measurements and quenching tests verified SO 4 •− and • OH as the active oxygen species in the CoFe/Mg MMO–PMS system. Combined characterization and density functional theory (DFT) calculation results confirmed that the Co species served as catalytic sites for PMS activation, and the adjacent Mg species acted as adsorption sites for DMA. The synergy effects between the dual sites could accelerate the PMS activation, facilitate the generation of free radicals, and shorten the migration distance between free radicals and pollutants, to realize the efficient DMA degradation. The degradation mechanism and suppressing re-emission process were proposed. This study will provide distinctive insights into the design of catalysts with dual sites and pioneer an unparalleled approach to the industrial governance of effluvial VOCs treatment.
研究领域:
环境科学
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催化
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化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
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2022
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IF 5.062
Yawei Wang,Hongbing Lin,Xuetao Zhao,Tong Ding,Yuqin Shen
Periodontitis is a chronic inflammatory disease characterized by alveolar bone loss , which affects the integrity of the tissue supporting the teeth. Previous studies have shown that reactive oxygen species (ROS) can promote the secretion of inflammatory factors and cause alveolar bone inflammatory reactions and bone resorption. Therefore, scavenging ROS is important for reducing the expression of inflammatory factors and improving the inflammatory environment of alveolar bone tissue. Superoxide dismutase (SOD) is one of the most effective antioxidant enzymes for eliminating ROS, which can protect cells from ROS toxicity and reduce the level of intracellular oxidative stress and inflammation. However, SOD molecules have shortcomings, such as short half-life and insufficient stability, which limit the application of SOD in inhibiting periodontal bone resorption. The use of carrier zeolitic imidazolate framework-90 (ZIF-90) with ATP-responsiveness and good biocompatibility can protect SOD molecules, improve SOD stability, and achieve intracellular SOD delivery. Therefore, we fixed SOD into ZIF-90 using the co-precipitation method to prepare ATP-responsive [email protected] and designed a study to investigate the ability of ATP-responsive [email protected] to reduce the inflammatory response of lipopolysaccharide (LPS)-stimulated human osteoblast MG-63. In our study, the ATP-responsive assembly efficiently suppressed the levels of ROS and pro-inflammatory cytokines, showing great potential to ameliorate the levels of oxidative stress, reduce inflammation, and increase osteoblast activity. This provides a novel idea for the application of SOD in alveolar bone resorption.
研究领域:
药学
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生物材料
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口腔科学
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细胞生物学
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产品关联
DOI
高影响因子
ACS Biomaterials Science & Engineering
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2023
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IF 5.8
Xianli Wang,Peiqi Shen,Nannan Gu,Yi Shao,Mengmeng Lu,Chunbo Tang,Cheng Wang,Chenglin Chu,Feng Xue,Jing Bai
Commercially available guided bone regeneration (GBR) membranes often exhibit limited mechanical properties or bioactivity, leading to poor performance in repairing bone defects. To surmount this limitation, we developed a Janus structural composite membrane (Mg-MgO/PCL) reinforced by dual Mg (Mg sheets and MgO NPs) by using a combined processing technique involving casting and electrospinning. Results showed that the addition of Mg sheets and MgO NPs enhanced the mechanical properties of the composite membrane for osteogenic space maintenance, specifically tensile strength (from 10.2 ± 1.2 to 50.3 ± 4.5 MPa) and compression force (from 0 to 0.94 ± 0.09 N mm–1), through Mg sheet reinforcement and improved crystallization. The dense cast side of the Janus structure membrane displayed better fibroblast barrier capacity than a single fiber structure; meanwhile, the PCL matrix protected the Mg sheet from severe corrosion due to predeformation. The porous microfibers side supported preosteoblast cell adhesion, enhanced osteogenesis, and angiogenesis in vitro, through the biomimetic extracellular matrix and sustainable Mg2+ release. Furthermore, the Mg-MgO/PCL membrane incorporating 2 wt % MgO NPs exhibited remarkable antimicrobial properties, inducing over 88.75% apoptosis in Staphylococcus aureus. An in vivo experiment using the rat skull defect model (Φ = 5 mm) confirmed that the Mg-MgO/PCL membrane significantly improved new bone formation postsurgery. Collectively, our investigation provides valuable insights into the design of multifunctional membranes for clinical oral GBR application.
研究领域:
生物材料
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组织工程
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生物医学工程
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骨科
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牙科科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2019
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IF 3.375
Yongli Sun,Xiang Gao,Na Yang,Xiaowei Tantai,Xiaoming Xiao,Bin Jiang,Luhong Zhang
With the aim of simultaneously achieving synthesis and morphology control of three-dimensional (3D) hierarchical layered double hydroxide (LDH) by more efficient and environmentally friendly methods, a facile and cost-efficient double-drop coprecipitation method was creatively applied to fabricate 3D flowerlike microstructures (Al2O3-MgAl-LDHs) using γ-Al2O3 as a sacrificial template. The morphology evolution process and growth characteristics of Al2O3-MgAl-LDHs were investigated in detail, revealing that γ-Al2O3 not only provides an effective support for the crystal growth of LDH but also is involved in the LDH layer formation process through self-decomposition. More importantly, LDH morphologies can be regulated by varying the reaction conditions, such as the γ-Al2O3 concentration, Mg2+/Al3+ molar ratio, and pH. Additionally, a possible formation mechanism for 3D hierarchical flowerlike Al2O3-MgAl-LDHs was illustrated. Remarkably, owing to the high specific surface area and low/medium/high-strength basic sites, the as-obtained LDH after calcination exhibited excellent catalytic activity and reusability in the transesterification of glycerol with dimethyl carbonate.
研究领域:
材料科学
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催化
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化学工程
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Small Methods
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2023
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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.
研究领域:
材料科学
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电化学
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能源存储
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电池技术
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2019
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IF 5.107
Shaofang Hu,Ying Sun,Min Pu,Rongping Yun,Xu Xiang
The high Mg/Li ratio in salt lake brine in China remains a challenge for the efficient separation of Mg and Li and the Li extraction. A reaction-coupled separation technology we proposed has been successfully applied to the highly efficient separation of Mg and Li from the brine. In this work, we conducted intensive investigations both experimentally and theoretically on the boundary conditions of Mg/Li separation from the brine in association with the initial Mg/Al ratio and Mg/Li ratio. We analyzed the relationship between the composition and the formation of precipitates by changing the Mg/Al molar ratio and the Mg/Li mass ratio in feedstock solution to determine the boundary conditions. The experimental results show that the Mg/Al molar ratio in the initial solution has a great influence on the separation of magnesium and lithium. It is evident that lithium enters the solid as a LiAl-layered double hydroxides (LiAl-LDHs) phase when the Mg/Al molar ratio is less than 2. It has also been found that the precipitate is independent of the Mg/Li mass ratio. From the theoretical results, it has been determined that an increase in the number of Li + clusters results in a decrease of the binding energy in the same system. Al 3+ prefers to combine with Mg 2+ to form MgAl-LDH clusters. However, when the Mg/Al ratio is lower than 2:1, Li + can form a cluster of LiAl-LDH layer. It can also be seen that different Li + numbers do not change the formation of clusters. Good agreement was found between the theoretical simulation results and the experimental data. This work provides a key criterion for the efficient separation of magnesium and lithium from the brine by a reaction-coupled separation technology.
研究领域:
化学工程
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材料科学
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
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2022
·
IF 5.532
Hongju Qiu,Weiwei Huang,Yanqiong Zhang,Jin Chen,Lei Gao,Mamdouh Omran,Li Nan,Guo Chen
In the family of inorganic nanomaterials , zirconia is a highly promising functional ceramic with a high refractive index , hardness, and dielectric constant, as well as excellent chemical inertness and thermal stability. These properties are enhanced in nano-zirconia ceramics, because nanopowders have a small particle size, good morphology, and uniform and dispersive distribution. In this study, a co-precipitation process was proposed to synthesise highly dispersed MgO–Y 2 O 3 co-stabilized ZrO 2 nanopowders. The effects of different calcination temperatures on the crystallisation degree and particle dispersion of zirconia nanopowders were characterised by X-ray diffraction (XRD), thermogravimetry-differential scanning calorimetry (TG-DSC), Raman spectroscopy , Fourier transform infrared spectroscopy (FTIR), nitrogen adsorption using the Brunauer–Emmett–Teller (BET) theory, transmission electron microscopy (TEM), and field emission scanning electron microscopy (FESEM). The optimum synthesis conditions were obtained as follows: 6 h of high-energy planetary grinding and calcination at 800 °C in an electric furnace. Under these optimum conditions, the average particle size of the prepared powder was 28.7 nm. This process enriches the literature on the controllable preparation of Mg–Y/ZrO 2 nanopowders obtained by the co-precipitation method.
研究领域:
材料科学
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纳米技术
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陶瓷工程
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化学工程
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
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2024
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IF 8.1
Yingchao Li,Shujia Wang,Xiao Fang Ouyang,Zhi Dang,Hua Yin
The simultaneous removal of anionic and cationic heavy metals presents a challenge for adsorbents. In this study, acetate (Ac-) was utilized as the intercalating anion for layered double hydroxide (LDH) to prepare a novel biochar composite adsorbent (Ac-LB) designed for the adsorption of Pb(II), Cu(II), and As(V). By utilizing Ac- as the intercalating anion, the interlayer space of the LDH was enlarged from 0.803 nm to 0.869 nm, exposing more adsorption sites for the LDH and enhancing the affinity for heavy metals. The results of the adsorption experiments showed that the adsorption effect of Ac-LB on heavy metals was significantly improved compared to the original FeMg-LDH modified biochar composites (LB), and the maximum adsorption capacity of Pb(II), Cu(II), and As(V) were 402.70, 68.50, and 21.68 mg/g, respectively. Wastewater simulation tests further confirmed the promising application of Ac-LB for heavy metal adsorption. The analysis of the adsorption mechanism revealed that surface complexation, electrostatic adsorption, and chemical deposition were the main mechanisms of action between heavy metals (Pb(II) and Cu(II)) and Ac-LB. Additionally, Cu(II) ions underwent a homogeneous substitution reaction with Ac-LB. The adsorption process of As(V) by Ac-LB mainly relied on complexation and ion-exchange reactions. Lastly, the modification of the LDH structure by Ac − as an intercalating anion, thereby increasing the affinity for heavy metals, was further illustrated using density-functional theory (DFT) calculations.
研究领域:
环境科学
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材料科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Yanqiu Li,Yuejun Ouyang,Rui Fang,Xiao Jiang,Zhi-Hui Xie,Liang Wu,Jilan Long,Chuan-Jian Zhong
To obtain high corrosion protection and break the bottleneck arising from galvanic corrosion between Ni layer and Mg alloy substrate, we report herein a triple-layer composite coating approach, consisting of Ni (ENP) underlayer, NiAl-layered double hydroxide (LDH) middle layer, and silane (PFDTMS) toplayer, i.e., ENP/LDH/PFDTMS. This nanocomposite coating was prepared on the Mg alloy surface by a combination of simple electroless plating, hydrothermal-assisted in situ growth, and condensation reaction. The surface morphology, structure, and chemical composition of the resulting composite coating are characterized using several techniques, including scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The corrosion protection performance of the composite coating in a saline solution is evaluated by electrochemical impedance spectroscopy (EIS), Tafel curve, and immersion measurements. The results indicated that the ENP/LDH/PFDTMS composite coating possesses a much higher corrosion resistance than the single Ni coating and the LDH-grown Ni (ENP/LDH) coating. In contrast to the severe galvanic corrosion the Mg alloy with single Ni coating observed in two days of exposure, the substrate with either ENP/LDH/PFDTMS coating or ENP/LDH coating is shown to exbibit no galvanic corrosion phenomenon even after 30 days of exposure. Moreover, the result from tests including contact angle measurement of the ENP/DLH/PFDTMS coating demonstrates the superhydrophobic function to several typical liquids in daily life and the good self-cleaning capability after contamination by graphite powder. These findings provide a fresh insight into the design of advanced coatings for inhibiting galvanic corrosion between Ni layer and Mg alloy.
研究领域:
材料科学
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腐蚀工程
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表面工程
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电化学
✓ 已验证
产品关联
DOI
高影响因子
ACTA MATERIALIA
·
2025
·
IF 9.3
Xiang Wei,Minhui Yuan,Meng Jiang,Huang Gong,Jing Shuai,Jiayi Ye,Lianjun Wang,Qihao Zhang,Wan Jiang
Zintl-phase thermoelectrics with CaAl 2 Si 2 -type structures exhibit desirable “phonon-glass electron-crystal” behavior. However, the development of environmentally friendly p-type counterparts remains challenging. While n-type Mg 3 Sb 2 -based compounds have achieved high figures of merit ( zT > 2.0), their integration with non-Zintl systems is hindered by thermal and chemical mismatches. Moreover, many existing p-type Zintl compounds rely on toxic (Cd, Pb) or scarce (Yb, Ge) elements, restricting their scalability and sustainability. Here, we report a scalable, rare-earth- and toxicity-free p-type Zintl compound, Ca 0.5 Mg 1.297 Ag 0.003 Zn 1.2 Sb 2 , developed via targeted Mg-site substitution. First-principles calculations reveal that Ca substitution at Mg1 sites induces beneficial electronic structure modifications, including bandgap widening, valence band sharpening, and an indirect-to-direct bandgap transition, collectively enhancing carrier mobility (50 cm 2 ·V -1 ·s -1 ) and strengthening carrier-phonon scattering at elevated temperature. Simultaneously, trace Ag doping at Mg2 sites precisely tunes the carrier concentration by nearly one order of magnitude, achieving improved electrical conductivity while maintaining ultralow thermal conductivity. As a result, the optimized compound achieves a peak zT of 0.81 at 773 K and an average zT of 0.50 over 300–773 K. These results demonstrate a chemically stable, sustainable, and high-performing Zintl platform, offering a promising strategy for advancing eco-friendly thermoelectric technologies.
研究领域:
材料科学
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热电学
·
固体物理
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能量转换
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电子结构
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）