ACS Applied Electronic Materials
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2025
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IF 4.7
Tiandong Zhang,Ziqi Jin,Hua Li,Zhaotong Meng,Yue Zhang,Yongquan Zhang,Changhai Zhang,Qingguo Chi,Mengjia Feng
Dielectric capacitors are widely used in electrical engineering due to their excellent insulation, high safety, and high power density. However, under high-temperature conditions, injected electric charges from metal electrodes, along with thermally generated charges, lead to a rapid increase in leakage current and severe degradation of insulation performance in polymer capacitive films, limiting long-term and stable operation. To address this issue, core–shell structured BN@MgO inorganic fillers were prepared using the magnetron sputtering method, with MgO as the core and BN as the shell. Results demonstrate that BN@MgO fillers significantly reduce conduction loss in poly(ether imide) (PEI) films by forming charge traps at interfacial regions between the fillers and the PEI matrix. The built-in electric field between BN and MgO efficiently captures mobile charges, enhancing the electrical insulation properties at elevated temperatures. Optimizing the doping content and BN shell thickness leads to a discharge energy density of 3.9 J/cm3 at 150 °C, with a charge/discharge efficiency of 90% for PEI/BN@MgO-1.5(2.5h) composite films. Additionally, excellent cyclic reliability and performance are maintained after 50,000 charge/discharge cycles. The study presents an efficient method for constructing core–shell BN@MgO fillers and clarifies mechanisms for restricting charge mobility.
研究领域:
材料科学
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电气工程
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Yuan Luo,Miaoqu Wang,Lusi Wang,Jin Peng,Zhibo Zhang,Guangzhou Qu,Esmat F. Ali,Peter S. Hooda,Manlin Li,Jörg Rinklebe,Sabry M. Shaheen,Xiaohong Liu,Ronghua Li
MgO-based adsorbents have been extensively utilized for phosphorus (P) resource recovery from wastewater. However, the microscopic interfacial adsorption mechanisms of P on different MgO crystal facets remain insufficiently understood. Elucidating interfacial mechanisms is crucial for the directional regulation of optimized-performance MgO-based adsorbent development. Herein, three MgO materials, octahedral MgO (OC-MgO), cube MgO (CU-MgO) and hexagonal MgO (HE-MgO) were synthesized and tested for phosphorus (P) adsorption and recovery from water. OC-MgO primarily exposes the (111) facet, CU-MgO exhibits the (100) facet, whereas HE-MgO displays both the (111) and (110) facets, with exposure ratios of about 69.5 % and 30.5 %, respectively. Batch experiment results proved that P adsorption performance correlated with the exposed crystal surface. The saturated P uptake capacities are 403.44, 278.04, and 221.47 mg/g for OC-MgO, CU-MgO, and HE-MgO, respectively, at a solution pH of 7.0, as determined by Sips model fitting. However, CU-MgO shows a faster P capture rate a stronger resistance to pH interference than the other two MgOs. The combination of model fitting, Zeta potential analysis and X-ray photoelectron spectroscopy (XPS) characterization demonstrated that the P adsorptive mechanism involved synergistic monolayer and multilayer adsorption, driven by surface complexation, ligand exchange, and electrostatic attraction. In addition, the density functional theory (DFT) calculations further provided mechanistic insights into facet-dependent stability and adsorption behaviors. The MgO (100) facet can stably exist in aqueous solutions, and its primary P adsorption mechanism involves chemisorption driven by monodentate-mononuclear, bidentate-mononuclear and bidentate-binuclear complexation and lattice oxygen replacement. In contrast, the MgO (1 1 1) and (1 1 0) facets required hydroxylation to maintain structural stabilization in water. On these hydroxylated surfaces, their P capture mechanisms are predominantly governed by electrostatic attraction and –OH group replacement. This study elucidates the fundamental structure–property relationships between MgO crystal facets and P adsorption behavior, revealing facet-dependent stabilization mechanisms in aqueous environments and their associated P capture pathways. These findings provide novel perspective of surface design for developing MgO-based adsorbents for P capture and recovery from water.
研究领域:
环境科学
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材料科学
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化学
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Journal of Nanoelectronics and Optoelectronics
·
2023
·Vol. 18
·期 12
·1458-1465
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IF 0.6
Wu Nan,Hu Kai,Fu Zhongchao,Long Haibo,Hou Zhaoxia,Shao Cen,Liang Xiao,Ibrahim Ahmed A.,Umar Ahmad
Low temperature combined with high application pressure sintering technology is one of effective approaches to fabricate ceramics with fine microstructure. We reported that the Gd2O3–MgO nanocomposite ceramics were obtained by hot-pressing sintering using
nanopowders derived from sol–gel combustion method in this paper. The high optical transmittance (80.1%–83.5%) over 2-6 μm and the high values for Vickers hardness (11.1 ± 0.3 GPa) and bending strength (192.6 ± 8.1 MPa) were obtained by hot-pressing sintering
at low sintering temperature (1300 μC) and high application pressure (65 MPa).
研究领域:
材料科学
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光学工程
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高影响因子
CERAMICS INTERNATIONAL
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2025
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IF 5.6
Mengchuan Li,You Zhou,Tongsheng Zhang,Rensheng Li
The sluggish advancement in technology for the recovery of rare earth elements from secondary resources can be largely attributed to an inadequate understanding of the thermodynamic properties of cerium oxide-based slag systems. This study systematically investigates the phase equilibrium of the Ce 2 O 3 -CaO-SiO 2 -5 wt% MgO quaternary system at 1500 °C and 1600 °C. High-temperature equilibrium experiments followed by rapid quenching were conducted, and phase assemblages were characterized by XRD, SEM and EPMA. For the first time, the results accurately determined the isothermal liquidus lines for the first time and identified the stable regions of key phases such as SiO 2 , Ce 2 Si 2 O 7 , CaO·2Ce 2 O 3 ·3SiO 2 , CaO·Ce 2 O 3 ·2SiO 2 , the Ce-doped dicalcium silicate (i.e., (Ca, Ce) 2 SiO 4 ), and the monticellite (i.e., CaMgSiO 4 ), as well as their coexistence relationships. Furthermore, the isothermal sections at 1500 °C and 1600 °C were constructed based on experimental data and fundamental thermodynamic principles. This study not only fills a critical gap in the thermodynamic database for rare-earth slag systems but also provides a theoretical basis for optimizing slag design and enhancing cerium recovery from waste slags.
研究领域:
冶金物理化学
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无机非金属材料
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高温过程热力学
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资源回收
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稀土冶金
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CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Bingyun Xi,Xianming Zhang,Shuhan Chen,Shi Qian,Xuanyong Liu
For guided bone regeneration (GBR) membranes, biodegradable magnesium has emerged as a highly promising candidate owing to its intrinsic biofunctionality associated with Mg 2+ release and its superior mechanical properties. However, achieving spatiotemporally controlled degradation that precisely matches the kinetics of new bone formation remains a critical challenge. To address this issue, a self-reinforcing interfacial diffusion system was engineered on magnesium in this study. Based on this concept, a multilayered magnesium oxide (MgO)/sodium alginate (SA) composite coating was fabricated and stabilized via Ga 3+ -mediated coordination and ionic crosslinking. This coating was strategically designed as a three-dimensional barrier to govern Mg 2+ release through diffusion-limited transport across the solid–hydrogel interface. Notably, during degradation, the released Mg 2+ dynamically coordinate with SA chains on top of the pre-existing trivalent ion-mediated crosslinked network, triggering progressive hydrogel network densification and consequent in situ formation of a self-reinforcing protective layer. Comprehensive in vitro biological evaluations demonstrate that the coating exerts multifunctional bioactivity via synergistic release of Mg 2+ and Ga 3+ . Specifically, it enhances osteogenic differentiation and proliferation of osteoblast, while also promoting human umbilical vein endothelial cell proliferation, migration, and tube formation for pro-angiogenic capacity. Furthermore, the sustained, low-dose release of Ga 3+ endows the system with broad-spectrum antibacterial activity. By integrating corrosion resistance, osteogenesis, pro-angiogenic functionality and antibacterial efficacy into a single dynamic platform, this system transcends conventional passive barrier strategies and enables active, biology-informed regulation of the regenerative microenvironment. Consequently, it establishes a robust and translational foundation for next-generation magnesium-based GBR membranes, with strong potential for clinical application in oral and maxillofacial bone reconstruction.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2019
·Vol. 30
·期 11
·10651-10659
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IF 2.195
Huang Xuechen,Liu Bang,Wang Shuanghu,Liu Yuxi,Wu Gang
Bi 2 O 3 - and MgO-doped BaTiO 3 –(Na 1/4 Bi 3/4 )(Mg 1/4 Ti 3/4 )O 3 (BT–NBMT) ceramics were synthesized from a solid-state approach, and then the impacts of Bi 2 O 3 and MgO dosages on the structures and dielectric characteristics were studied. Obvious dual peaks were observed with Bi 2 O 3 dosage to 0.04 and MgO dosage to 0.02. The low-temperature dielectric stability and grain size of the Bi 2 O 3 dopant were improved, while those of the MgO dopant hardly changed with MgO dosage to 0.02, indicating the core/shell microstructure of BT–NBMT was formed following the dissolving-precipitating mechanism of BT systems doped with low-melting-point substances. The low-temperature dielectric stability of the Bi 2 O 3 - or MgO-doped BT–NBMT ceramics first improved and then deteriorated with the increase of doping concentrations. High-temperature stability and diffuse-state transition were found in the optimal ceramics. The second phases of Bi 2 O 3 and MgO, magnesium titanium compounds were observed in Bi 2 O 3 and MgO dopants, respectively. Bi 2 O 3 -doped and MgO-doped ceramics exhibited a fine-grained microstructure and significant grain growth, respectively, and the core/shell microstructure was responsible for the dielectric temperature stability for Bi 2 O 3 dopants and collapsed to a homogeneous one with remarkable grain growth and the second phases for MgO dopants.
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CHEMICAL ENGINEERING JOURNAL
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2018
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IF 6.735
Yuanwu Hu,Hongjie Cui,Zhenmin Cheng,Zhiming Zhou
CO 2 capture and sequestration is one of the viable solutions to reduce the CO 2 emissions from fossil fuel combustion, and sorption-enhanced water gas shift (SEWGS) is a promising technology for pre-combustion CO 2 capture. In this study, a novel alkali metal salt (AMS)-promoted MgO-CaCO 3 sorbent was applied to the SEWGS process, and this sorbent exhibited fast sorption rate, high capacity and good stability in 30 CO 2 capture cycles. Catalyst and sorbent particles were arranged in a layer-by-layer alternating configuration in the reactor. The effects of operating conditions such as temperature, pressure and initial H 2 O/CO molar ratio were investigated, and the thermodynamic equilibrium analyses of the CO 2 sorption on AMS-promoted MgO-CaCO 3 and the SEWGS process in the layered configuration were carried out, based on which the optimization of the reactor configuration was performed. A high-purity H 2 (99.4% in dry basis) was experimentally achieved in the SEWGS process at 573 K, 12 atm and an initial H 2 O/CO molar ratio of 1.5 with a three catalyst/sorbent layered configuration, and the cyclic stability was demonstrated over 10 consecutive SEWGS cycles.
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FUEL
·
2022
·
IF 8.035
Qiangqiang Xue,Huilin Yi,Zhengwen Li,Zhao Jiang,Meng Chen,Yujun Wang,Binhang Yan,Guangsheng Luo
Surface modification of 600-µm-sized monodisperse gamma-alumina microspheres into magnesium–aluminum spinel, and co-impregnation-based loading of Rh–Ni (0.46 wt% Rh, 9.03 wt% Ni) were performed to synthesize catalysts for diesel-steam-reforming to hydrogen. The intimate interactions between Rh and Ni, the formation of the Rh–Ni alloy, and the Rh-doping-induced decrease in the particle size of Ni were determined. The DFT calculations results revealed that Rh-doped Ni(1 1 1) established remarkably weak bonds with oxygen-containing intermediates, and the reaction barrier of the rate-limiting step (CH 2 * + O* → CH 2 O*) on Rh–Ni(1 1 1) (0.76 eV) was lower than those of Ni(1 1 1) (1.14 eV) and Rh(1 1 1) (1.56 eV). The bimetallic catalyst shows the enhanced activity and resistance of sintering and carbon deposition compared with those of Ni-based (9.33 wt% Ni) and Rh-based (0.47 wt% Rh) catalysts. The catalytic performance of Rh–Ni-based catalyst was superior to that of physically mixed Ni-based and Rh-based catalysts at similar active metal loadings, which further confirmed the synergistic effect of Rh–Ni.
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PROGRESS IN ORGANIC COATINGS
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2022
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IF 6.206
Kai Xing,Qinsheng Chen,Jixing Lin,Zunying Hu,Zhongxu Li,Jiayi Chen,Xueer Xu,Changdong Gu,Jiangping Tu
Polycaprolactone (PCL) based polymers are usually considered as potential coating materials for improve corrosion resistance of biodegradable magnesium alloy due to excellent mechanical property and biocompatibility. However, as for the quality and stability of the polymer-based coatings, the interfacial adhesion of polymer coating to magnesium substrate and the antibacterial ability should not be ignored. Herein, to improve the interfacial adhesion of PCL based coating, a MgO/MgCO 3 transition layer was prepared on the biodegradable WE43 magnesium alloy by a facile chemical conversion process in a deep eutectic solvent-based ionic liquid . Moreover, ZnO nanoparticles were loaded in the PCL to form a PCL/ZnO coating on the transition layer to further enhance corrosion resistance, biocompatibility, and antibacterial activity of the magnesium alloy substrate. Electrochemical corrosion test and in vitro biocompatibility tests, including cytotoxicity and antibacterial activity, were performed in a simulated body environment, which showed that the substrate covered by the double-layered coating possesses good corrosion resistance, biocompatibility and antibacterial ability.
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Journal of Environmental Chemical Engineering
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2022
·
IF 7.968
Guangwen Xu,Hongrui Shang,Weiting Gong,Xiaolei Zhang,Yuling Shan,Junwei Ding,Wenlong Yu
Large-scale application of p-nitrophenol (PNP) will inevitably cause environmental issue , while adsorption treatment using carbon-based adsorbents is an effective way to remove PNP from water. Herein we report a recyclable MgO-templating one step strategy to synthesize N/O co-doped hierarchical porous carbons derived from inexpensive petroleum pitch (PP) with low-dose melamine . The MgO-template precursor could be removed and recycled by acetic acid leaching, almost without template consumption and saline wastewater generation during the whole synthetic process, and the porous carbons prepared from the recycled magnesium acetate exhibited consistent hierarchical pore structures. The obtained porous carbons possess tunable specific surface area with the varying ratio of MgO template to PP. The sample of MPHPC-1.25 with high specific surface area of 1010.73 m 2 /g and volume of 1.68 cm 3 /g exhibits remarkable PNP adsorption capacity of 626.02 mg/g in batch and of 427.15 mg/g in dynamic fixed-bed adsorption test. In addition, the MPHPC-1.25 shows outstanding tolerance for PNP adsorption under various ionic backgrounds and excellent adsorption stability and reusability in continuous adsorption-regeneration cycles, suggesting its high potential in practical application. Furthermore, the enhanced PNP adsorption mechanism based on hierarchical pore structure and strong electrostatic interaction between PNP and N, O species dominated by pyridinic-N and carboxyl groups was elucidated by a combination of material characterization, adsorption thermodynamic-kinetic evaluation and DFT calculations .
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Ningning Dong,Lifa Ge,Pei Chen,Wei Wang,Fatang Tan,Xinyun Wang,Xueliang Qiao,Po Keung Wong
Stable, cheap and environmentally friendly CaO 2 was widely used to remediate environmental pollution, especially in advanced oxidation process (AOP) systems. However, its non-radical activation was still a huge challenge. In this study, the non-radical activation of CaO 2 nanoparticles was realized by MgNCN/MgO composites for efficient remediation of organic and heavy metal-contaminated wastewater. The presented CaO 2 -based AOP system exhibited excellent degradation performance towards tetracycline (TC) and methylene blue (MB) over a broad pH range, accompanied with the weak influences of common coexisting anions and natural water sources. Singlet oxygen ( 1 O 2 ) was verified as the dominant active species for organics degradation, and the coordination between MgNCN and MgO in MgNCN/MgO composites played a crucial role in the non-radical activation of CaO 2 nanoparticles. More importantly, the AOP system could not only degraded effectively organic pollutants, but also remove simultaneously heavy metal ions in wastewater. 100 mg/L CaO 2 and MgNCN/MgO could successfully remediate the complex pollution consisting of 10 mg/L MB and 100 mg/L Cd 2+ . Furthermore, the degradation intermediates of MB and the solid residues after treating pollutants were analyzed in detail to reveal the degradation process and conversion products.
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CATALYSIS LETTERS
·
2021
·Vol. 152
·期 8
·2524-2532
·
IF 3.186
Jiang Haoxi,Jiang Angjiong,Gao Qiang,Yang Guochao,wang Lingtao
In this work, Ta was firstly reported as an efficient promoter of MgO–SiO 2 for the conversion of ethanol and acetaldehyde to 1,3-butadiene. The doping of Ta into MgO–SiO 2 forms Ta–O–Si bonds and generates more strong Lewis acid sites, which not only promote the aldol condensation reaction but also significantly facilitate the Meerwein–Ponndorf–Verley reduction, the total conversion around 80% which drops to 65% after 24 h. In addition, the catalyst showed desirable stability in 24 h long-term stability evaluation, the selectivity remained stable at 80%. Graphic Abstract
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危险品化学品经营许可证（带存储）