Journal of Magnesium and Alloys
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2020
·
IF 7.115
Xin Wang,Chuan Jing,Yuxiang Chen,Xiushuang Wang,Gang Zhao,Xing Zhang,Liang Wu,Xiaoying Liu,Biqin Dong,Yuxin Zhang
Magnesium alloys, the advanced lightweight structural materials, have been successfully applied in the manufacturing field. Unfortunately, their poor corrosion resistance restrains the potential wide applications. In this work, anti-corrosion coatings were fabricated via the in-situ growth of the corrosion inhibitors intercalated magnesium-aluminum layered double hydroxide (Mg–Al LDH) on AZ31 magnesium alloy and then post-sealing it by a super-hydrophobic coating. SEM, XRD, EDS, FTIR, XPS and contact angle test were conducted to analyze physical/chemical features of these coatings. Potentiodynamic polarization curves and electrochemical impedance spectroscopy were recorded to assess the anti-corrosion performance of prepared coatings. Surprisingly, Mg–Al LDH with molybdate intercalation and lauric acid modification achieves the excellent corrosion inhibition performance (99.99%) due to the multicomponent synergistic effect such as the physical protection of Mg–Al LDH, the corrosion inhibition of molybdate and super-hydrophobic properties of lauric acid. This work presents a scientific perspective and novel design philosophy to fabricate the efficient anti-corrosion coating to protect magnesium alloys and then expand their potential applications in other field.
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Catalysis Science & Technology
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2021
·Vol. 11
·期 21
·7200-7216
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IF 6.119
Hairus Abdullah,Hardy Shuwanto,Dong-Hau Kuo
A Ni–Mg bimetal-doped Zn(O,S) photocatalyst has been synthesized, characterized, and tested for several photocatalytic applications. The hydrogen generation reaction, hydrogenation reaction for chemical transformation, detoxification of hexavalent chromium, and mixed dye (MB + RhB + MO) degradation under simulated solar-light illumination were confirmed. The essential characterization results indicated improved oxygen vacancy sites on the catalyst with enhanced photoresponse, better photocarrier separation, and facile charge transfer properties. A typical catalyst, NMZ-S10, was evaluated with a 1000-cycle CV test to demonstrate its long-term use for industrial application. Stable reusability experiments for the HER, PHR, PHC reaction, and PDM also supported the long-term application. The photocatalytic HER of NMZ-S10 could evolve hydrogen at a rate of 4000 μmol g−1 h−1. 30 ppm azobenzene-to-aniline conversion was completely done in 2 h of reaction. Detoxification of 30 ppm hexavalent chromium was conducted in 70 min of reaction. Finally, 10.5 ppm MB–RhB–MO mixed dye degradation was carried out in 1 h of reaction. The as-synthesized NMZ-S10 catalyst has demonstrated its capability to overcome energy and environmental issues promisingly. The great photocatalytic activities are discussed and elucidated with a plausible mechanism to rationalize the superb catalytic performance.
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CHEMICAL ENGINEERING JOURNAL
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2019
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IF 8.355
Dan Jiang,Xianchao Xia,Jian Hou,Guangyi Cai,Xinxin Zhang,Zehua Dong
Inspirations from nature have led to extensive developments of biomimetic nonwetting surfaces and intelligent self-healing technologies toward corrosion protection of metals. Integration of both intriguing features contributes to achieving diversified protections. In this work, we engineered a novel anticorrosion system composed of a plasma electrolytic oxidation (PEO) film, a layered double hydroxide (LDH) film and a lubricant-infused slippery surface on Mg alloy . The PEO film grown in situ on Mg alloy could render a moderate corrosion barrier, and the sandwiched LDH film integrated ternary roles involving loading corrosion inhibitor, anchoring lubricant and sealing PEO defects. The outermost slippery surface exhibited durable repellence against water and also self-reparable capability to surface damage. The robust and self-reparable film barrier coupled with active corrosion inhibition endowed this system with superb anticorrosion performance. The dynamic self-healing processes associated with barrier regeneration and corrosion inhibition were substantiated at microscale using scanning Kelvin probe and scanning vibrating electrode technique, respectively. It is expected that this research would shed light on the design of multifunctional anticorrosion systems for Mg alloy.
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CHEMICAL ENGINEERING JOURNAL
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2021
·
IF 13.273
Yunlei Zhao,Youyou Li,Bo Jin,Zhiwu Liang
As a powerful process intensification strategy, chemical looping shows a promising future to achieve an integrated CO 2 capture and utilization for reducing CO 2 emissions and energy-cost penalties. Herein, a bifunctional Ca-Fe-Mg material derived from layered double hydroxide (LDH) was synthesized and used in chemical looping reforming process for integrated CO 2 capture and utilization. Reactivity tests and detailed characterization techniques are performed to examine and explain the performance of this material. 900 °C is determined as a suitable reforming temperature, since more syngas production is obtained (2.5 times of at 800 °C). The presence of Ca induces a synergetic interaction between Ca and Fe to implement an enhanced performance of syngas contents and stable H 2 /CO ratio. The activity deactivation of the material derives from the phase transition of Ca 2 Fe 2 O 5 to MgFe 2 O 4 , crystal size variation and particle agglomeration. Compared to a reference coprecipitated material, LDH derived Ca-Fe-Mg material shows an enhanced syngas production, due to its highly dispersion of CO 2 sorption and reforming active sites. This work provides a new route to rationally design bifunctional material for integrated CO 2 capture and utilization.
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JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
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2022
·Vol. 331
·期 11
·4587-4600
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IF 1.754
Tao qinqin,Xie Jinhua,Li Yan,Dai Ying,Liu Zhirong
Mg-Al layered double hydroxides (LDH) (F-MgAl-LDHs and O-MgAl-LDHs) and Mg-Al layered double oxides (LDO) (F-MgAl-LDO and O-MgAl-LDO) nanosheets were prepared using a modified co-precipitation and oven/freeze dry route for adsorption of uranium. The freeze dry could evidently promote the adsorption ability. It’s resulted from larger specific surface (F-MgAl-LDO > F-MgAl-LDHs > O-MgAl-LDO > O-MgAl-LDHs) and pore size, as well as sufficient expose of vacant sites in the inner struture of F-MgAl-LDHs and F-MgAl-LDO. The pH, shaking time, initial uranium concentation and temperature influenced the adsorption capacity of F-MgAl-LDHs, O-MgAl-LDHs, F-MgAl-LDO and O-MgAl-LDO, while ionic strength exerted slightly little influence. Na 2 CO 3 highlighted the best desorption effectivity, with desorption efficiency of 97.84% for F-MgAl-LDHs and 98.52% for F-MgAl-LDO, respectively. It is noteworthy that maximum adsorption capacity of F-MgAl-LDO reached 1099.93 mg/g, locating the top rank in the uranium-specific adsorbents. The adsorption conformed to the pseudo-second-order model, indicating chemical adsorption in nature. The thermodynamic was also investigated. The adsorption mechanism was determined that M-O and C-O bonds participated the complex process in the uranium adsorption. The study proposed the freeze dry as an efficient method to promote adsorbent performance.
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ACS Sustainable Chemistry & Engineering
·
2025
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IF 7.3
Wendi Lai,Caixing Wang,Rui Fang,Kanghui Liu,Wei Yang,Guowang Diao,Yanrong Wang
Compared to conventional organic electrolytes, aqueous magnesium-ion batteries (AMIBs) have emerged as a research hotspot due to their superior safety, environmental compatibility, and cost-effectiveness. However, the further development of AMIBs has been impeded by their short cycling lifespan, primarily caused by the aqueous corrosion of Mg anodes in water-containing electrolytes, which generates inorganic passivation layers (e.g., Mg(OH)2 and MgO) on the anode surface. To address this challenge, we propose a collaborative two-pronged approach, involving the adoption of a novel electrolyte system (saturated MgCl2 aqueous solution containing 25 vol % PEG, SMP-3) and the use of a Mg alloy anode. Electrochemical investigations suggest that the PEG molecules form hydrogen bonds with H2O molecules, effectively suppressing water activity and thereby enhancing anode stability. The assembled PTO/Mg alloy full cell exhibited a stable discharge plateau at 1.5 V with an initial discharge capacity of 176.24 mAh g–1 at 200 mA g–1. Remarkably, the cell demonstrated exceptional cycling stability, maintaining a capacity of 150 mAh g–1 after 300 cycles (85% capacity retention), with an average Coulombic efficiency approaching 100%. The results demonstrate the feasibility of stabilizing Mg alloy anodes through an interfacial engineering strategy based on a water-in-salt electrolyte design. This strategic approach provides a novel pathway for developing low-cost, high-performance AMIBs.
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Environmental Science-Nano
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2025
·
IF 5.1
Ying Wang,Fuming Wang,Xuyang Feng,Haoyou Jiang,Hualin Zhang,Yongfang Qian,Botian Zhu,Yaping Huang,Yimin Zhu
In recent years, microbial pollution has become a serious environmental problem, and the release of microorganisms into the water environment seriously threatens human health. As environment-friendly and low-cost antibacterial agents, Mg(OH)2 nanoparticles (M-NPs) have garnered considerable attention for their small size, innocuity, no drug resistance, chemical stability and thermal stability. However, little is known about the physiological changes that bacteria undergo in the presence of M-NPs. In this work, the antibacterial mechanism of M-NPs synthesized by applying the coprecipitation method was investigated using Escherichia coli (E. coli) as a model system. The oxygen vacancies on the M-NP surface, which can produce reactive oxygen species (ROS, ·O2−, H2O2, and ·OH), were examined via O2-temperature programmed desorption (O2-TPD). Abnormality in three central metabolic pathways (energy, glucose and tricarboxylic acid cycle) induced by M-NPs was detected by analyzing the activity of respiratory chain dehydrogenase, gluconokinase (GK) and succinate dehydrogenase (SDH). The downregulated activity and gene expression levels of GK confirmed that M-NPs play an inhibitory role, and these physiological changes result in cell death. Thus, M-NPs have great potential in the field of preventing and controlling microbial pollution.
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产品关联
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高影响因子
Frontiers in Energy Research
·
2022
·
IF 3.858
Zhang Shuai,Ren Huixue,Fu Kaifang,Cheng Wenqing,Wu Daoji,Luo Congwei,Jiang Shengyun,Li Jie,Zhang Mingyue
The printing and dyeing wastewater produced by different dyes, as well as different printing and dyeing processes, have different components. These wastewater have high toxicity, high organic concentration, and deep chromaticity. Ozone catalytic oxidation is a very promising technical method for wastewater treatment. In this paper, Mn/Mg/Ce ternary catalyst was prepared, and the ozone catalytic oxidation treatment of actual and simulated printing and dyeing wastewater was performed to study the performance of four different carrier catalysts, namely, molecular sieve (MS), silica gel (SG), attapulgite (ATP), and nano alumina (Al2O3), by simulated dynamic test. The effects of reaction time, pH, and catalyst dosage on methyl orange degradation were studied. The results showed that under the optimum treatment conditions (120 min, pH 11, and 12.5 g/L catalyst dosage), the degradation rate of methyl orange reached 96% and the removal rate of the chemical oxygen demand of printing and dyeing wastewater reached 48.7%. This study shows that the treatment effect of ozone catalytic oxidation on printing and dyeing wastewater is remarkably improved after catalyst addition. This study provides a new choice of ozone catalyst for the degradation of printing and dyeing wastewaters in the future.
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CHEMICAL ENGINEERING JOURNAL
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2023
·
IF 15.1
Wenjie Zhao,Yujie Zhang,Haomiao Li,Yi Shen,Kangli Wang,Kai Jiang
Rechargeable Mg batteries with the merits of low cost, high safety and environmental compatibility are deemed as promising energy storage techniques for large-scale applications. However, the actual development of rechargeable Mg batteries is constantly hindered by the difficulty of finding suitable electrode materials to accommodate Mg 2+ . Cu 2-x Se has exceptionally high electrical conductivity and its unique crystal structure could be better compatible with Mg 2+ cations. Herein, a novel Cu 2-x Se hollow nanocube with extraordinarily high conductivity and unique structure was designed and synthesized by facile one-step template-directed selenation reaction methods. The excellent Mg electrochemical performance of Cu 2-x Se hollow nanocube cathodes was demonstrated based on rechargeable Mg batteries. The Cu 2-x Se NCs provide a high specific capacity of 232.5 mAh g - 1 at 100 mA g - 1 , superior cycling stability over 3700 cycles, and an excellent rate capacity of 163.1 mAh g - 1 at 3000 mA g - 1 . Furthermore, the two-step magnesiation/demagnesiation processes of the Cu 2-x Se NC cathodes were revealed, and the accelerating effects of the fast Mg 2+ diffusion in the unique hierarchical structure on magnesium storage performance were analyzed. The outcomes of this study not only provide simple methods for fabricating high-performance Cu 2-x Se cathodes but also propose valuable insights for exploring conversion-type Mg-storage materials.
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Materials Today Nano
·
2021
·
IF 8.109
P. Zhang,C. Xie,G. Han,Q. Zhu,L. Chen,M. Jin,Q. Liu,Y. Zhou,Q. Sun,J. Xie
Chemical/electrochemical instability of LiCoO 2 (LCO) at high voltage limits its deliverable capacity and thereby energy density of the battery , although it has a high theoretical capacity of 274 mAh/g. In this study, stable cycling of LiCoO 2 at a voltage as high as 4.55 V can be achieved by simultaneous lattice doping with Mg (LMCO) and surface coating with a NASICON-type Li 1.4 Al 0.4 Ti 1.6 (PO 4 ) 3 (LATP) solid-state electrolyte. Uniform coating can be realized by a facile Pechini route combined with solid-phase calcination . The LCO with 4 wt% LATP coating and 2 at% Mg doping (4 wt% LATP/LMCO-0.02) can deliver a high capacity of 204 mAh/g in the voltage range of 3.0–4.55 V (vs. Li/Li + ) at 0.4C. After 300 cycles at 0.4C, the 4 wt% LATP/LMCO-0.02 material can maintain 86.2% of its initial capacity, significantly superior to those of undoped and/or uncoated materials. The results show that both doping and coating are critical in inhibiting structural change of LCO and electrolyte decomposition at a deeply charged state of LiCoO 2 material.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Songlin Wang,Nan Jiang,Yanyan Liu,Yan Hao,Qiying Zhang,Hongying Niu,Jianji Wang
Methyl phenyl carbonate (MPC) is a versatile carbonate, particularly as an important component in the lithium-ion battery industry. Recently the green synthesis of carbonates from non-toxic feedstocks and efficient catalysts have attracted a considerable amount of interest but the development of a highly active catalyst for this synthesis is a great challenge. Herein, novel Pb-Mg thin nanosheet catalysts with high specific areas and large pore volumes were developed by one-pot hydrothermal approach for the synthesis of MPC without using any solvent. The nanosheets were thoroughly characterized by SEM-EDS, TEM , XPS , NH 3 -TPD, XRD , BET, and H 2 -TPR techniques. It is shown that a diphenyl carbonate (DPC) conversion of 56.6% and an MPC selectivity of 98.8% are achieved by a Pb-Mg nanosheet catalyst with 15 wt% Pb. The activity and selectivity values are significantly higher than the previous best value reported by using transition metal-based catalysts. After the reaction, the nanosheets can be separated by simple centrifugation and can be reused many times without a significant loss of catalytic activity, showing excellent stability and recyclability. A possible mechanism was investigated based on these results. This work provides new insight into accomplishing the efficient and green synthesis of MPC and offers a strategy for synthesizing other asymmetric carbonates.
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Acta Metallurgica Sinica-English Letters
·
2021
·Vol. 35
·期 3
·411-424
·
IF 2.755
Xu Rong,Li Ruidi,Yuan Tiechui,Zhu Hongbin,Li Ping
In order to refine the microstructure and improve the performance of direct energy deposited (DED) additively manufactured Al–Mg–Sc–Zr alloy, TiC-modified Al–Mg–Sc–Zr composites were prepared by DED and the effect of TiC content on the microstructure and performance was studied. In the absence of TiC particle, the microstructure of Al–Mg–Sc–Zr alloy prepared by DED consisted of fine grains with average size of 8.36 μm, and well-dispersed nano-Al 3 (Sc,Zr) particles inside the grains and Mg 2 Si phase along the grain boundaries. With the addition of 1 wt% TiC, the microstructure of TiC/Al–Mg–Sc–Zr prepared by DED became finer apparently compared with that without TiC; while the further increase of TiC content to 3 wt%, the microstructure of TiC/Al–Mg–Sc–Zr prepared by DED became coarser with appearance of a new kind of needle-like (Ti,Zr) 5 Si 3 phase. Also, the addition of TiC decreased the porosity of Al–Mg–Sc–Zr prepared by DED. Simultaneously, after the addition of TiC, the tensile strength increased from 283.25 MPa to 344.98–361.51 MPa, and the elongation increased from 3.61% to 9.58–14.10%. The potential mechanism of the microstructure evolution and strength improvement was discussed. This research will provide new insights into the available metal matrix composites by laser additive manufacturing (LAM).
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