ACS Central Science
·
2026
·
IF 11.1
Liu Yan,Qian Li,Li Xiaogang,Tian Yuqing,Ma Jiaping,Song Siyu,Zhang Yixian,Yuan Aihua,Tian Huajun
Rechargeable magnesium
batteries are promising next-generation
energy storage systems owing to the low cost and high natural abundance
of magnesium. However, their practical application is critically impeded
by the parasitic decomposition of conventional electrolytes at the
Mg anode, leading to the formation of a passivation layer, high desolvation
barriers, and poor cycling stability. Herein, triethyl phosphate (TEP)
is introduced as a cosolvent into the Mg(OTf) 2 + MgCl 2 -DME electrolyte to regulate solvation structures and interfacial
chemistry. Comprehensive spectroscopic and electrochemical analyses
reveal that TEP facilitates salt dissociation and reconstructs the
Mg 2+ solvation structure, thereby reducing the desolvation
barrier and promoting ion transport. Meanwhile, TEP contributes to
the formation of a stable and robust solid electrolyte interphase
on the Mg anode, effectively suppressing side reactions and enabling
uniform Mg deposition. The Mg||Mg symmetric cell exhibits stable cycling
for over 3500 h with an overpotential below 0.2 V at 0.1 mA cm –2 and 0.05 mAh cm –2 . The Mg||Mo asymmetric cell delivers a Coulombic efficiency of 99.4%
after 3000 h at 0.5 mA cm –2 and 0.25 mAh cm –2 . Furthermore, the Mg||α-MnO 2 full
cell maintains a discharge capacity of 176.9 mAh g –1 after 350 cycles at 0.1 C. This work provides a solvation-regulation
strategy for designing high-performance Mg electrolytes.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Jiarao Shi,Xincui Shi,Ran Pang,Su Zhang
In this work, a series of near-infrared persistent luminescent phosphors CaSnO 3 :Bi,xMg 2 + were prepared via Mg 2+ co-doping, and the effects of Mg²⁺ doping on the structure, luminescence properties, Bi valence state, and defects of the phosphors were systematically studied. The results show that at low doping concentrations, Mg²⁺ primarily enters the CaSnO 3 lattice in an interstitial manner, leading to lattice expansion. The interstitial incorporation of Mg²⁺ introduces positive charges, which promotes the reduction of Bi³ ⁺ to Bi²⁺, thereby increasing the concentration of Bi²⁺ and enhancing the near-infrared photoluminescence efficiency of the phosphors. Moreover, Mg²⁺ codoping modified the defect distribution in the phosphor, which further enhances the near-infrared persistent luminescence intensity. Under the optimal Mg 2+ doping concentration, the photoluminescence intensity of the phosphor increased by 0.8 times, and the initial persistent luminescence brightness improved by 6.3 times compared to the Bi singly-doped sample. This study not only provides a new near-infrared persistent luminescent phosphor but also offers a novel strategy for regulating the valence state of Bi ions through interstitial codoping to prepare Bi 2+ -based near-infrared persistent phosphors.
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DESALINATION
·
2025
·
IF 9.8
Lu Gao,Yue Miao,Xiaowen Huo,Yingying Zhao,Zhaojing Jing,Xiuling Liu,Haitao Wang,Ning Fan,Qiuying Jia,Kai Ren,Jun Li,Na Chang
The key to lithium extraction from brine lies in achieving efficient Li + /Mg 2+ separation, which imposes stringent requirements on the precision and efficiency of separation technologies. Among existing techniques, nanofiltration (NF) membranes stand out as a critical approach due to their superior ion-sieving capabilities, yet conventional NF membranes still face challenges in improving Li + /Mg 2+ separation ratios. In this study, the nonionic surfactant, Sorbitan monooleate dehydrate (Span80) was introduced to regulate the diffusion behavior of piperazine (PIP) molecules by reducing interfacial tension. Results from molecular dynamics simulations, ultraviolet spectroscopy experiments, and positron annihilation lifetime spectroscopy analysis revealed that Span80 enhances the uniform diffusion of PIP molecules at the interface, optimizes the membrane pore size distribution, and significantly improves Li + /Mg 2+ separation performance. The fabricated NF membrane achieved a Li + /Mg 2+ separation ratio of 94.28 under a Mg 2+ /Li + mass ratio of 100:1. This study introduces an innovative strategy for tailoring interfacial reactions via surfactant modulation, providing new insights into the design of high-performance NF membranes for lithium extraction from brine.
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Catalysts
·
2026
·Vol. 16
·期 6
·494
·
IF 4.5
Zijie Chen,Jinyang Chen
A series of Mg-Al LDH-based photocatalysts were synthesized via a one-pot steam-assisted method, including pure Mg-Al LDH (MA), Zn-In ion-exchange-modified Mg-Al LDH (MAZ), BiOCl-loaded pristine Mg-Al LDH (MAB), and Zn-In-modified Mg-Al LDH co-loaded with TiO2and BiOCl (MA/Zn-In/TiO2/BiOCl, MAZB). The one-pot synthesis facilitated the in situ intercalation and uniform loading of BiOCl/TiO2/Zn-In, while Zn2+/In3+modified the MA layers via ion exchange, leading to an expansion of the interlayer spacing. The innovation of this work is reflected in two aspects: first, all raw materials are added via a one-pot strategy to achieve in situ preparation of modified hydrotalcite; second, this synthetic route features simple post-treatment without complicated washing, pressure filtration, and other tedious operations. The samples were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and N2adsorption–desorption isotherms. The bismuth chloride oxide/TiO2/LDHs exhibited a layered structure, with the active components uniformly distributed between the layers and on the MA surface. Under simulated sunlight irradiation, MAZB achieved 97.5% degradation of 20 mg/L MB within 120 min, with an apparent rate constant of 0.0297 min−1, which is 7.2 times, 2.4 times, and 2.9 times that of MA, MAZ, and MAB, respectively. The degradation rate of MAZB still remained at 89.5% after five cycles, demonstrating excellent stability and reusability. Compared with traditional hydrothermal methods, this steam-assisted system features mild reaction conditions (180 °C, atmospheric pressure), sodium-free raw materials, no washing requirement, and zero waste discharge, showing prominent green advantages.
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Surfaces and Interfaces
·
2026
·
IF 6.3
Peihui Xu,Kaipeng Chen,Rongrong Li,Longjin Du,Binghong Chen,Jianzhong Liu
Addressing the inhibitory influence of the oxide layer on the ignition and combustion of aluminium particles stands as one of the pivotal factors in facilitating its utilisation as an amphibious fuel. In this investigation, leveraging the distinctive properties of oxalic acid (OA), which is prone to decomposition and gas generation and holds substantial optimisation potential, surface modification of aluminium particles was conducted in conjunction with boron and magnesium particles. Al-based amphibious energetic composites (AEC) were thereby synthesised. Subsequently, their thermal behaviour, ignition and combustion characteristics, and action mechanism were investigated. The results indicate that the thermal behaviour of AEC samples encompasses dehydration, decomposition, and oxidation stages under amphibious atmospheres (namely, air, water vapour, and their mixtures). The atmosphere exerts a minimal influence on the thermal behaviour. Additives can remarkably enhance the ignition and combustion performance of aluminium particles. Owing to the readily decomposable OA and magnesium oxalate (OM) adsorbed on its surface and the highly reactive Mg particles, the ignition delay time of AEC in amphibious atmospheres is shortened by approximately 45–67 ms. Nevertheless, OA and OM merely function in particle dispersion. Consequently, the oxidising atmosphere in the environment has a substantial impact on the combustion performance of AEC samples. When O₂ is preponderant, the surface reactions of B and Mg clusters on the surface of aluminium particles release heat, thereby facilitating the combustion (the maximum combustion temperature is increased by approximately 600 K). When H₂O is dominant, this combustion-promoting effect diminishes. During combustion, the formation of metal oxides with high melting and boiling points, such as MgO, impedes the contact between the core active metals and oxidising gases, thereby reducing the self-sustained combustion performance of AEC samples. This research will offer crucial insights for the development and application of amphibious metal fuels.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Tian Yuan,Shiyu Lv,Xueyan Zhang,Weilin Fu,Pu Yang,Kerong Fu,Qiuxian Zhang,Xia Yao,Yanli Luo,Feng Wang
Phosphate ore reserves are insufficient for sustained human use, and the resource recovery of condensed phosphates in water bodies remains challenging. Herein, nanomagnesia (AA-MgO) with coexisting magnesium and oxygen vacancies was synthesized via the sacrificial template method using metal–organic frameworks. AA-MgO achieved efficient condensed-phosphate catalysis and simultaneous orthophosphate recovery in an electrocatalytic coupling adsorption system. Its unique dual-vacancy structure considerably enhanced its electrocatalytic performance. Under optimal conditions, AA-MgO showed adenosine triphosphate (ATP) and pyrophosphate (P ∼ P) removal rates of 98.75% and 98.20%, respectively, exhibiting 2.06–13.23 times better pseudo-first-order kinetics than commercially available MgO. After being regenerated thrice, AA-MgO maintained a > 70% removal rate, demonstrating excellent structural stability. Quenching and radical-trapping experiments confirmed that the catalytic process involved radical and nonradical pathways, with ·OH playing a dominant role in catalyzing ATP, while the nonradical pathway involving 1 O₂ contributed more significantly to P ∼ P degradation. Density functional theory calculations showed that the ATP adsorption energy was higher on the V Mg + V o surface than on the V o surface. Moreover, the energy barrier of the rate-determining step in P ∼ P degradation was lower on the former, indicating that this surface favored condensed-phosphate degradation. Finally, differential charge and electrochemical characterization revealed that AA-MgO exhibited superior electron transfer rates than MgO.
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DIAMOND AND RELATED MATERIALS
·
2026
·
IF 5.2
Renfei Xu,Xiangjun Li,Miaomiao Li,Yinxia Dong,Libo Tong
Despite the outstanding lightweight potential of Mg alloys, their poor corrosion resistance significantly limits their practical applications in engineering. As a more sustainable alternative to solvent-based resins, waterborne polyurethane (WPU) coatings offer notable environmental and safety benefits, including low VOC emissions, non-flammability, and ease of application. However, the inherent microporous defects formed during the curing process, coupled with the absence of self-healing capabilities, notably undermine their protective performance. In this study, a smart hybrid coating was developed to improve the corrosion protection of WPU on Mg alloys. The coating combines benzotriazole (BTA)-loaded mesoporous polydopamine (mPDA) microspheres and hydroxylated boron nitride (OH-BN) within the WPU matrix, achieving active-passive synergistic protection through dual pH/light responsiveness. The mPDA enhances OH-BN dispersion within the matrix and simultaneously acts as an intelligent carrier for the controlled release of BTA under acidic or light-irradiated conditions. Electrochemical impedance spectroscopy (EIS) showed that, after 6 h of immersion in NaCl solution (pH = 3), the damaged composite coating retained an impedance modulus of 2.37 × 10 5 Ω·cm 2 at 0.1 Hz, and maintained a value of 1.97 × 10 5 Ω·cm 2 under light irradiation-28 and 2.8 times higher, respectively, than pure WPU. These results confirm the coating's outstanding corrosion resistance and stimulus-responsive self-healing capability, which arise from the synergistic effects of the OH-BN barrier and BTA release under pH and light stimuli. This work presents a sustainable and intelligent corrosion protection strategy for Mg alloys in harsh environments.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Lei Cai,Xiang Song,Cheng-Bao Liu,Lan-Yue Cui,Shuo-Qi Li,Fen Zhang,M. Bobby Kannan,Dong-Chu Chen,Rong-Chang Zeng
This work reports the design and preparation of novel organic (polyvinyl alcohol, PVA)-inorganic (neodymium nitrate, Nd(NO 3 ) 3 ) hybrid coatings on micro-arc oxidation (MAO) coating for magnesium (Mg) alloy corrosion protection . X-ray diffractometer , X-ray photoelectron spectroscopy, fourier transform infrared spectroscopy , field emission scanning electron microscope , Energy Dispersive X-ray spectrometer and surface roughness were applied to characterize the chemical composition and surface morphology of the coatings. The corrosion resistance of the coatings was evaluated by electrochemical and salt spray tests. The results suggested that the formation of PVA-Nd 3+ and PVA-Mg 2+ complexes promoted the enrichment of Nd 3+ on the surface, and thereby improved the sealing quality and compactness of the coating. Interestingly, when the coating was damaged, the Nd 3+ ions were transformed to their carbonates and covered the active sites, and thus exhibiting self-healing function. Further, the corrosion resistance of PVA-Nd 3+ modified MAO composite coating on AZ31 Mg alloy was improved.
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Journal of the Taiwan Institute of Chemical Engineers
·
2023
·
IF 5.7
Yaru Li,Yanyan Liu,Caiying Liu,Li Feng,Shuao Yang,Yuxue Shan,Fei Xiao
Background Toxic metals such as Pb(II) and Cd(II) have thrown great threat to human health. Adsorption has been drawn more attention due to its low-cost, easy process and extensive raw materials. However, high efficient and environmental-friendly adsorbents are still in great need. Furthermore, the quantitatively adsorption mechanisms of Pb(II) and Cd(II) remain unclear. MgO-loaded lotus stem biochar was proposed as a highly efficient adsorbent to removal aqueous Pb(II) and Cd(II). Methods MgO-loaded biochar was prepared by using lotus stalk as a precursor to be pyrolyzed with MgCl 2 impregnation. Adsorption isotherms , kinetics, thermodynamics experiments were carried out. SEM, XRD, FTIR, XPS, etc. were employed to characterize the adsorbent before and after adsorption. Significant findings The adsorption capacities of MgO-loaded biochar for Pb(II) and Cd(II) reached 1379.54 mg/g and 404.04 mg/g, respectively, which were 5 and 20 times higher than that of the original biochar. The adsorption kinetics and thermodynamics indicated that the adsorption process was a chemisorption-based heat absorption reaction, and the characterization results showed the main adsorption mechanisms were ascribed to ion-exchange, precipitation, surface complexation between biochar and Pb(II)/Cd(II) ions, in which the ion exchange mechanism was quantitatively confirmed. Finally, MgO-loaded biochar has been proved to be an efficient adsorbent.
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JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Kaiming Zhu,Zhanglin Chen,Yuzhen Wang,Hui Liu,Yude Niu,Xin Yi,Yihuan Wang,Xuanyi Yuan,Guanghua Liu
Eu 2+ -doped CaAlSiN 3 ‐type structure nitrides have been extensively studied as a red-emitting phosphors in white light emitting diodes (w-LEDs), but there are few reports of systematic research on the effect of solid solution substitution on their long persistent luminescent properties. In this work, a series of (M,Ca)AlSiN 3 :Eu 2+ (M = Sr, Mg) phosphors have been successfully synthesized by efficient combustion synthesis . We investigated the effect of Sr and Mg solid solution on long persistent luminescent properties. Thermoluminescence (TL) measurements were performed in those persistent phosphors to obtain direct experimental results on the trap depth. The results show that the SrAlSiN 3 :0.2 at% Eu 2+ phosphor exhibits the most intense red persistent luminescence with the persistent time of as long as 200 min at the threshold value of 0.32 mcd/m 2 due to the presence of more trap levels with suitable depths of 0.71 eV. Compared with the solid solution of Sr, the solid solution of Mg ions can increase the depth of trap levels in CaAlSiN 3 . Among them, Mg 0.2 Ca 0.8 AlSiN 3 :0.2 at% Eu 2+ phosphor achieved a maximum trap depth of 0.98 eV, making it a promising candidate for optical information storage applications.
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Advanced Energy Materials
·
2022
·Vol. 12
·期 32
·2201600
·
IF 29.698
Zhenyu Chen,Chao Hao,Bowen Yan,Qiuyan Chen,Huiyan Feng,Xiaoqing Mao,Jianmei Cen,Zhi Qun Tian,Panagiotis Tsiakaras,Pei Kang Shen
Traditional calcination usually causes sintering of Pt, which diminishes Pt exposure in proton exchange membrane fuel cell (PEMFC) electrodes. In the present work, a facile self-confined method for synthesizing highly dispersed PtCo-alloy on Co, N co-doped mesoporous carbon (PCN-MC) is developed via a dual-template strategy. Owing to the co-confined effect of Zn in the bimetallic zeolite-based imidazolate framework (ZIF) and Mg(OH) 2 template, ultra-fine 2.7 nm PtCo-alloy with 2–3 atomic-layer Pt-skin nanoparticles are obtained. By adjusting the Co/Zn feeding-ratio in the bimetallic ZIF at 8/7, the alloying degree and nanoparticle size are optimized to achieve an outstanding oxygen reduction reaction activity with a high mass activity (MA) of 0.956 A mg Pt −1 in 0.1 m HClO 4 , about 7.5-fold of that of commercial Pt/C. Furthermore, notable durability is also achieved with 81% retention of the initial MA after 30k cycles conducted between 0.6–1.0 V (versus reversible hydrogen electrode). These features are also verified by a H 2 –Air fuel cell test with an excellent combination of mass activity, power density, and durability. This strategy provides a feasible route for the large-scale synthesis of highly-dispersed PtCo-alloy catalysts.
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Polymers
·
2021
·Vol. 13
·期 14
·2302
·
IF 4.329
Qingwen Yu,Zhiyuan Meng,Yichao Liu,Zehao Li,Xing Sun,Zheng Zhao
After an osteosarcoma excision, recurrence and bone defects are significant challenges for clinicians. In this study, the curcumin (Cur) loaded chitosan (CS) nanoparticles (CCNP) encapsulated silk fibroin (SF)/hyaluronic acid esterified by methacrylate (HAMA) (CCNPs-SF/HAMA) hydrogel for the osteosarcoma therapy and bone regeneration was developed by photocuring and ethanol treatment. The micro or nanofibers networks were observed in the CCNPs-SF/HAMA hydrogel. The FTIR results demonstrated that alcohol vapor treatment caused an increase in β-sheets of SF, resulting in the high compression stress and Young’s modulus of CCNPs-SF/HAMA hydrogel. According to the water uptake analysis, SF caused a slight decrease in water uptake of CCNPs-SF/HAMA hydrogel while CCNPs could enhance the water uptake of it. The swelling kinetic results showed that both the CCNPs and the SF increased the swelling ratio of CCNPs-SF/HAMA hydrogel. The accumulative release profile of CCNPs-SF/HAMA hydrogel showed that the release of Cur from CCNPs-SF/HAMA hydrogel was accelerated when pH value was decreased from 7.4 to 5.5. Besides, compared with CCNPs, the CCNPs-SF/HAMA hydrogel had a more sustainable drug release, which was beneficial for the long-term treatment of osteosarcoma. In vitro assay results indicated that CCNPs-SF/HAMA hydrogel with equivalent Cur concentration of 150 μg/mL possessed both the effect of anti-cancer and promoting the proliferation of osteoblasts. These results suggest that CCNPs-SF/HAMA hydrogel with superior physical properties and the bifunctional osteosarcoma therapy and bone repair may be an excellent candidate for local cancer therapy and bone regeneration.Keywords:curcumin;hyaluronic acid;silk fibroin;chitosan nanoparticle;MG-63 cells;MC3T3-E1 cells
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