JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
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2015
·Vol. 91
·期 4
·985-993
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IF 2.349
Jiang Lu,Xiaodan Wei,Yu Chang,Shuanghong Tian,Ya Xiong
BACKGROUND An ozonation catalyst needs to be recycled easily and to exhibit high activity in view of its practical application in wastewater treatment. In this study, magnetic mesoporous MgFe 2 O 4 was successfully prepared and used as a new ozonation catalyst for degradation of Acid Orange II (AOII). The role of Mg in MgFe 2 O 4 was revealed to explain the high activity by catalytic experiments and XPS analysis. RESULTS The degradation efficiency of AOII in the MgFe 2 O 4 /O 3 process exceeds 90% over a wide pH range of 4.6–9.6, slightly affected by the solution pH. The catalytic activity of MgFe 2 O 4 is much higher than that of MgO, Fe 2 O 3 and also their mixture (MgO+Fe 2 O 3 ) with identical molar ratio of Mg 2+ to Fe 3+ , indicating the first role of Mg, i.e. coupling with Fe to present a synergistically catalytic effect. Furthermore, MgFe 2 O 4 possesses a reaction rate constant at least 2.3 times that of NiFe 2 O 4 , MnFe 2 O 4 , and CuFe 2 O 4 . It illustrates the second role of Mg, i.e. causing the high electron density on lattice oxygen in MgFe 2 O 4 indicated by XPS and thus favoring activation of the electrophilic ozone. CONCLUSIONS This study demonstrated the easy recycling and high activity of MgFe 2 O 4 in catalytic ozonation, and revealed the role of Mg in MgFe 2 O 4 . © 2015 Society of Chemical Industry
研究领域:
环境科学
·
催化材料
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2018
·
IF 3.779
Jiaguang Zheng,Xuezhang Xiao,Yan He,Man Chen,Meijia Liu,Shouquan Li,Lixin Chen
The Mg(BH 4 ) 2 -AlH 3 - x LiH ( x = 0, 0.5, 1) novel ternary composites have been synthesized through mechanical ball milling, their favorable dehydrogenation properties and mechanism have been experimentally investigated. It can be found that during ball milling, a slight amount of Mg(BH 4 ) 2 would react with LiH and transform into LiBH 4 , while most Mg(BH 4 ) 2 remained stable after ball milling. Two major dehydrogenation steps can be detected in the Mg(BH 4 ) 2 -AlH 3 - x LiH composite, which belong to the decomposition of AlH 3 and Mg(BH 4 ) 2 , respectively. Remarkably, the onset hydrogen desorption temperature of Mg(BH 4 ) 2 -AlH 3 - x LiH composite can be reduced to 125.9 °C, with a total hydrogen desorption capacity of 10.3 wt%. It is worth emphasizing that the reversible dehydrogenation capacity is obviously improved to 3.8 wt%, compared to the Mg(BH 4 ) 2 -AlH 3 composite. This reversible capacity can be held for 3 cycles without obvious degeneration. Microstructural analysis on de/rehydrogenated composite has identified the regeneration of [BH 4 ] - in Mg(BH 4 ) 2 -AlH 3 -0.5LiH composite and revealed the role of LiH in the cycling hydrogen desorption and absorption processes. The formation of LiBH 4 and MgH 2 resulted from the rehydrogenation between MgAlB 4 and LiH could be helpful for the stability of reversible hydrogen storage performance.
研究领域:
材料科学
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能源存储
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DOI
高影响因子
OPTICAL MATERIALS
·
2021
·
IF 3.08
Yunpeng Wang,Ruiting Hao,Jie Guo,Xiaoming Li,Shuiliu Fang,Huimin Liu,Shuaihui Sun
In this paper, magnesium was successfully introduced into CZTS using the DMF-based solution method, and CZMTS solar cell was prepared. The effects of Mg doping on the morphology, crystal structure, and electronic properties of the CZTS absorber were investigated in detail. The crystal structure of the CZMTS absorber and the chemical valence states of the other elements (Cu, Zn, Sn, and S) were not changed as shown by XRD , Raman, and XPS analyses. The results show that Mg doping can improve the electronic properties and microstructure of CZTS absorbers, thus enhancing the PCE from 2.91% to 4.10%. This performance enhancement is associated with good crystal quality, reduced cation-disordering defects, and high external quantum efficiency at the longwave region caused less recombination and open circuit voltage loss. Therefore, Mg doping has a positive effect on improving the performance of CZTS solar cells.
研究领域:
材料科学
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能源科学
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高影响因子
SCANNING
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2020
·
IF 1.33
Lin Sun,Bing Cheng Zhao,Teng Wang,Jia Yi Cui,ShuXin Zhang,Feng Li,Qianqian Zhang,HongXin Cai,Heng Bo Jiang,Eui-Seok Lee
The application prospect of biodegradable materials is being studied extensively. However, the high corrosion rate and its alloys in body fluids have been major limitations of the application of pure Mg (magnesium). To improve corrosion resistance of biodegradable AZ31 Mg alloy, we adopted microarc fluorination within a voltage range of 100-300 V in 46% hydrofluoric acid. To obtain morphologies, chemical compositions, and structural characteristics, field-emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy (EDS), and X-ray diffraction (XRD) were performed, respectively. Results showed that the coating was mainly composed of MgF2. Electrochemical corrosion and immersion tests proved that the corrosion resistance of MAF-treated AZ31 Mg alloy was significantly improved compared with untreated AZ31 Mg alloy in HBSS (Hank’s Balanced Salt Solution). Current densities of AZ31, MAF100, MAF150, MAF200, MAF250, and MAF300 were 342.4, 0.295, 0.228, 0.177, 0.199, and 0.212 μA/cm2, respectively. The roughness test indicated that samples under MAF treatment of 200 V, 250 V, and 300 V had large surface roughness. Meanwhile, the contact angle measurement and surface free energy test suggested that those samples had smaller contact angle and higher SFE than Ti. Thus, MAF-treated AZ31 Mg alloy might have promising application in various fields.
研究领域:
材料科学
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生物医学工程
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腐蚀科学
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DOI
PubMed
高影响因子
RARE METALS
·
2025
·
IF 11
You Lv,Qiang Yang,Jixing Zhu,Dongyue Zhao,Junyuan Fan,Valery Konstantinovich Sheleg,Xin Qiu
en Mg−Ni−Y alloy is considered to be one of the most promising hydrogen storage materials, but its high dehydrogenation energy barrier hinders its practical application. A dual-stage heat treatment (490°C × 4 h + 550°C × 4 h) is applied to optimize the microstructure and hydrogen storage performance of a vacuum-melted Mg 94 Ni 3 Y 3 alloy. This process induces a two-level phase transformation of the long-period stacking ordered (LPSO) structure (18R + 14H→14H→18R), facilitating Ni/Y atom pre-distribution via stacking fault recombination at 490°C and promoting a eutectic-like reaction at 550°C. As a result, a large-scale eutectic-like structure composed of finely dispersed and uniformly interwoven Mg 2 Ni and LPSO phases is formed, characterized by a high density of phase boundaries. The optimization of the microstructure directly leads to the enhancement of hydrogen storage performance, as evidenced by a reduction in dehydrogenation activation energy from 139.7 to 113.5 kJ mol −1 and a decrease in enthalpy change from 85.8 to 71.7 kJ mol −1 . This work demonstrates a convenient microstructure regulation strategy, which is expected to advance Mg−Ni−Y alloys toward industrial applications. 摘要 zh Mg−Ni−Y 合金因其优异的储氢潜力而备受关注,但较高的脱氢能垒仍制约其工程化应用。针对真空熔炼的Mg 94 Ni 3 Y 3 合金,本研究采用双阶段热处理工艺(490°C×4 h+550°C×4 h)调控其显微组织与储氢性能。结果表明,该工艺诱导长周期堆垛有序(LPSO)结构经历两级相变过程(18R+14H→14H→18R):在490°C通过层错重组实现Ni/Y原子的预分布,在550°C进一步促进类共晶反应的发生。由此形成的大尺度类共晶组织由细小弥散且均匀交织的Mg 2 Ni相与 LPSO 相构成,具有高密度相界特征。显微组织的显著优化有效降低了脱氢活化能(由139.7降至113.5 kJ mol −1 )和焓变(由85.8降至71.7 kJ mol −1 ),从而提升了储氢动力学性能。本工作提出了一种简便高效的组织调控策略,为Mg−Ni−Y合金的工程化应用提供了新思路。
研究领域:
材料科学
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氢气储存
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金属合金
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热处理工艺
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
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2026
·
IF 4.4
Xie Tao,Jian Yuxuan,Wang Chuang,Pan Qingrui,Yang Lingzhuo,Long Jinxiang,Yang Fenglin,Wu Xianwen,Wu Xianming
LiMn x Fe 1 − x PO 4 (LMFP) is a promising cathode candidate due to its high working voltage, cost-effective advantages, and environmentally friendly characteristics. However, LMFP is constrained by issues such as low intrinsic electronic and ionic conductivity, as well as Jahn–Teller lattice distortion induced by Mn 3+ , which limit its practical performance. To synergistically optimize its electrochemical behavior, LiMn 0.6 − x − y Fe 0.4 Mg x Zn y PO 4 (x = 0, y = 0; x = 0.005, y = 0.005; x = 0.01, y = 0; x = 0, y = 0.01) composite materials were designed and synthesized via a solvothermal method in this study. A comparative investigation of these samples was conducted to systematically elucidate the mechanisms underlying individual Mg and Zn doping and their synergistic co-doping. The experimental results indicate that the synergistic strategy of Mg and Zn dual-doping combined with carbon coating helps stabilize the olivine structure of LMFP, improves the reaction kinetics, and lowers the Li + diffusion energy barrier. The optimized LMFP/C-MgZn1 exhibits enhanced electrochemical performance, retaining 92.42% of its capacity after 600 cycles at 1.0 C and delivering a discharge specific capacity of 109.8 mAh g −1 at 10.0 C. Furthermore, Density Functional Theory (DFT) calculations indicate that the co-doping strategy improves the reaction kinetics by reducing both the material’s band gap and the Li + diffusion energy barrier. Graphical abstract Mg Zn co doping stabilizes LMFP/C, reduces the Li diffusion barrier and band gap,and enables fast kinetics with durable cycling. The alternative text for this image may have been generated using AI.
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高影响因子
ELECTROCHIMICA ACTA
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2026
·
IF 5.8
Xin Li,Wenpo Li,Rong Wang,Chunliu Xu,Lei Guo,Jawza A. Almutairi,Hanan Alghibiwi,Bochuan Tan
[N₁₈₈₈][NTf₂] serves as a bifunctional electrolyte additive for Mg–air batteries. • [N₁₈₈₈][NTf₂] forms a hydrophobic, MgF₂-containing interfacial layer on Mg. • DFT and MD simulations reveal preferential and stable adsorption on Mg(0001). • The protective effect is concentration-dependent, with an optimum at 1 mM. • The cell delivers 1853.3 Wh·kg⁻¹ and a discharge duration of 123.3 h. Mg-air batteries are limited by severe self-corrosion of the magnesium anode and accumulation of discharge products, leading to reduced anode utilization and discharge voltage. This study introduces the ionic liquid [N₁₈₈₈][NTf₂] as a bifunctional electrolyte additive to regulate the magnesium/electrolyte interface. The long alkyl chain of [N₁₈₈₈]⁺ forms a hydrophobic barrier, restricting water access to the magnesium surface and inhibiting magnesium self-corrosion; [NTf₂]⁻ coordinates with Mg²⁺, slowing the accumulation of discharge products. This complementary cation-anion regulation achieves a balance between inhibiting corrosion and maintaining effective dissolution of the magnesium anode. The full cell achieved a discharge voltage of 1.45 V and a specific energy of 1853.3 Wh·kg⁻¹ at 5 mA·cm⁻²; at 10 mA·cm⁻², the discharge time reached 123.3 h, approximately seven times that of the blank electrolyte. This work provides an ion-specific interface regulation strategy for improving magnesium anode utilization and the discharge performance of MABs. Download: Download high-res image (331KB) Download: Download full-size image
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高影响因子
TRANSACTIONS OF TIANJIN UNIVERSITY
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2026
·
IF 7.8
Gong Mengcong,Wang Qingfa,Liu Linlin,Zhang Xiangwen
ZSM-48 zeolite, which features one-dimensional ten-membered-ring straight channels, is an ideal support for hydroisomerization catalysts to improve fuel low-temperature fluidity. To improve the poor low-temperature fluidity of Fischer–Tropsch synthesis products, this study employed Mg modification on Pt/ZSM-48 catalysts to optimize their hydroisomerization performance. A series of Mg-Pt/ZSM-48 catalysts with varying Mg loadings was prepared via incipient wetness impregnation. The effects of Mg modification on the pore structure, acidity, and metal–acid balance of the Pt/ZSM-48 catalyst system were systematically investigated. Catalytic performance was evaluated using n-hexadecane as a model compound. The Mg species selectively modified the micropore channels, decreasing the specific surface area and micropore volume. Moreover, Mg 2+ selectively neutralized Brønsted acid sites, reducing the concentration of medium-strong acid sites and Brønsted acidity while introducing Lewis acid sites, thereby lowering the Brønsted/Lewis acid ratio. Appropriate Mg modification optimized the metal–acid balance, making acid-catalyzed skeletal isomerization the rate-determining step. Although the Mg-modified catalysts exhibited moderately reduced catalytic activity, their isomer selectivity and yield were significantly enhanced. The 0.5 Mg-Pt/Z48 catalyst achieved an isomer yield of 81.81% at 91.18% conversion, representing a 9% improvement over the unmodified catalyst. The micropore confinement effect weakened the interaction between alkane molecules and micropore channels, promoting the key–lock catalytic mechanism. This increased the formation of mono-branched isomers close to the center of the main carbon chain, significantly improving the low-temperature fluidity of the fuel. This study provides a simple and efficient strategy for designing high-performance hydroisomerization catalysts for long-chain n-alkanes. Graphical
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Muhammad Junaid Khan,Muhammad Rehan Islam,Farooq Hafeez,Chunyan He,Jun Zhang,Yunlei Xianyu
The proliferation of pathogenic microorganisms is a significant cause of food spoilage, resulting in substantial economic losses and public health risks. To ensure food safety and extend shelf life, packaging must not only maintain product integrity but also prevent contamination by multidrug-resistant (MDR) pathogens such as Escherichia coli ( E. coli ), Listeria monocytogenes ( Listeria ), and Candida albicans ( C. albicans ). In this study, we developed a multifunctional nanocomposite (Mg-MOF-74@CA/CNF) by integrating magnesium-based metal–organic framework (Mg-MOF-74), carvacrol (CA), and chitin nanofibers (CNF). This nanocomposite was subsequently incorporated into a polyvinyl alcohol (PVA) matrix to fabricate the final film (Mg-MOF-74@CA/CNF/PVA). The resulting film demonstrated excellent antimicrobial activity, achieving up to 98 % inhibition of MDR pathogens through reactive oxygen species (ROS) generation and disruption of microbial membranes. In addition, the film exhibited improved thermal stability, enhanced tensile strength, and superior barrier properties against oxygen and water vapor. Application tests on cherry, cauliflower, and chicken confirmed significant reductions in microbial growth and weight loss, alongside prolonged shelf life while maintaining product quality. These findings highlight Mg-MOF-74@CA/CNF/PVA as a sustainable and effective alternative to conventional packaging materials, offering both food preservation and enhanced safety.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2020
·
IF 4.939
Xuelei Feng,Jianguang Yuan,Yujie Lv,Bogu Liu,Haixiang Huang,Bao Zhang,Youhua Yan,Shumin Han,Ying Wu
Magnesium borohydride (Mg(BH 4 ) 2 ) is an attractive materials for solid-state hydrogen storage due to its high hydrogen content (14.9 wt%). In the present work, the dehydrogenation performance of Mg(BH 4 ) 2 by adding different amounts (10, 20, 40, 60 wt%) of two-dimensional layered Ti 3 C 2 MXene is studied. The Mg(BH 4 ) 2 -40 wt% Ti 3 C 2 composite releases 7.5 wt% hydrogen at 260 °C, whereas the pristine Mg(BH 4 ) 2 only releases 2.9 wt% hydrogen under identical conditions, and the onset desorption temperature decreases from 210 °C to a relative lower temperature of 82 °C. The special layered structure of Ti 3 C 2 MXene and fluorine plays an important role in dehydrogenation process especially at temperatures below 200 °C. The main dehydrogenation reaction is divided into two steps, and activation energy of the Mg(BH 4 ) 2 -40 wt% Ti 3 C 2 composite is 151.3 kJ mol −1 and 178.0 kJ mol −1 , respectively, which is much lower than that of pure Mg(BH 4 ) 2 .
研究领域:
材料科学
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能源存储
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DOI
高影响因子
Advanced Materials Interfaces
·
2020
·Vol. 8
·期 1
·2001606
·
IF 4.948
Zuohao Wen,Yujie Ke,Chengchen Feng,Shuliang Fang,Miuyang Sun,Xinghai Liu,Yi Long
The VO 2 -based smart windows can dynamically and reversibly adjust the indoor solar irradiation to reduce the energy consumption for building glasses. This paper reports the first successful preparation of Mg-doped VO 2 @ZrO 2 core−shell nanocrystals with promoted thermochromic performance as well as tunable appearance and wettability. The achieved combination of T lum of 52.4% and ∆ T sol of 7.1% is comparable to the best-reported results of VO 2 -based core−shell rod structures. The thickness of ZrO 2 shell is tunable between 3 and 14 nm, resulting in a slightly hydrophobic surface and a slight color change toward blue-green and brighter produced films. The preparation method based on hydrothermal and UV-curing methods is facile. This work may inspire future development of VO 2 synthesis, their structure−property, and the application the thermochromic films for energy-saving purposes in buildings or automobiles.
研究领域:
材料科学
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能源技术
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纳米技术
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DOI
高影响因子
JOURNAL OF ELECTROCERAMICS
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2026
·
IF 2.6
Zhou Wenjie,Zhang Yun,Yin Zezhen,Yang Jing,Ding Shihua
LiAl 1 − x Mg x O 2− x /2 ( x = 0, 0.01, 0.02, 0.03, 0.04, 0.05) ceramic were prepared by conventional solid-phase reaction method. After X-ray diffraction analysis, a single-phase solid solution was formed in this system throughout the doping range. Through the oxygen vacancies formation by the replacement of Al 3+ with Mg 2+ , the relative density was increased from 94.33% to 96.1%. The dielectric constant ( ε r ) showed a trend of first enhancing and then decreasing with doping concentration. Their relationship mainly depended on the synergistic effect of relative density and dielectric polarizability. The improvement in the quality factor ( Q×f ) from 15,647 GHz to 34,507 GHz was attributed to the increased doping ratio and the strengthened covalent bonds. The change in the temperature coefficient of resonance frequency ( τ f ) was explained from the perspective of oxygen bonding valence. Excellent microwave properties were ε r = 6.59, Q×f = 34,507 GHz, and τ f = -115.8 ppm/°C for LiAl 0.97 Mg 0.03 O 1.985 ceramic at 1325 °C for 5 h.
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高影响因子
危险品化学品经营许可证（带存储）