CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Meiling Xu,Linchun Nie,Jiawei Liao,Dejing Meng,Wenjing Liu,Haobo Yang,Ranhao Zhao,Qingxiang Zhou
A novel and visible ratiometric fluorescence sensor based on magnesium and nitrogen co-doped carbon dots (Mg, N-CDs) encapsulated in zeolitic imidazolate framework-8 (Mg, N-CDs@ZIF-8) was designed for effective detection of oxytetracycline (OTC), employing a “turn-off/turn-on” fluorescence sensing strategy. The blue-emission Mg, N-CDs@ZIF-8 was quenched owing to fluorescence resonance energy transfer by OTC, while the green fluorescence of OTC was significantly enhanced through the interaction of Mg 2+ and Zn 2+ with OTC, enhancing the visual tracking of OTC through a distinct blue-to-green color transition. This sensor displayed a wide linearity range (0.02 − 25 μg/mL), a low detection limit (14.2 ng/mL), and a fast response time (6 min). The validity of the sensor was successfully verified by detecting OTC in milk, honey, tap water, and lake water samples. Additionally, an expandable fluorescence sensor array was constructed for the discrimination of four tetracycline antibiotics (TCs) in real samples, indicating significant application in complex environmental samples.
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高影响因子
CERAMICS INTERNATIONAL
·
2025
·Vol. 51
·期 30
·63013-63021
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IF 5.6
Ning Zhang,Junqi Chen,Ning Guan,Huaicheng Xiang,Ying Tang,Yuandong Qin,Liang Fang
Two novel ceramics, Li 2 Mg 2 Ga 2 Ti 3 O 12 (LMGT) and Li 2 Zn 2 Ga 2 Ti 3 O 12 (LZGT), featuring a spinel structure, were synthesized utilizing the solid-state method. Comprehensive characterization confirms that LZGT ( P 4 3 32) forms a B-site 1:3 ordered spinel, while LMGT ( Fd -3 m ) adopts a disordered spinel structure. The ceramics exhibit outstanding microwave dielectric properties, characterized by low ε r of 14.92 and 19.11, high Q×f of 120,000 and 93,800 GHz, and negative τ f of −40.21 and −32.83 ppm/°C for LMGT and LZGT, respectively. The observed ε r values significantly exceed theoretical values due to underestimated Ti 4+ polarizability along with the rattling effect of Ti 4+ and Ga 3+ . Q×f values correlate with packing fraction, lattice energy, and electrical properties. The negative τ f values stem from dominant positive τ ε and τ αm contributions. Utilizing LMGT with ultra-low loss, a dielectric resonator antenna was designed, achieving a radiation efficiency of 93.01 % and a gain of 6.12 dBi at 6.60 GHz, highlighting significant potential for C-band communication satellite applications.
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Journal of Materials Chemistry C
·
2018
·Vol. 6
·期 48
·13136-13147
·
IF 5.976
Gongcheng Xing,Yuxin Feng,Min Pan,Yi Wei,Guogang Li,Peipei Dang,Sisi Liang,Maxim S. Molokeev,Ziyong Cheng,Jun Lin
Red-emitting phosphors are indispensable compounds which are used to achieve a warm white light in phosphor-converted white light emitting diodes (pc-WLEDs). However, the luminous efficiency and stability of red phosphors are still big challenges. In this work, we developed red-emitting double perovskite phosphors La2ATiO6:Bi3+,Mn4+ (A = Mg, Zn) (LAT:Bi3+,Mn4+) and discuss the relationship between the double perovskite phosphor structure and the luminescence performance in detail. According to the Rietveld refinement results for the La2Mg(1−w)ZnwTiO6:Bi3+,Mn4+ (0 ≤ w ≤ 1) (LM(1−w)ZwT:Bi3+,Mn4+) solid solution, the proposed mechanism of the spectral adjustment is ascribed to the appearance of the phase transition, which results in a lower local structural symmetry of the [LaO12] polyhedron and the variation of the crystal field environment for Mn4+. Notably, this is the first time that the influence of the local structure variation on the luminescence tuning in double perovskite structure phosphors has been revealed, and this could offer guidance for the development of new phosphor system. By designing Mg2+/Zn2+ cation substitution, the internal quantum efficiency (IQE) is remarkably enhanced beyond 20%. In addition, we succeeded in achieving a Bi3+/Mn4+ co-doped energy transfer in the double perovskite structure phosphors. Owing to the Bi3+ → Mn4+ energy transfer in LAT, the red emission of the Mn4+ ions could be dramatically enhanced. The energy transfer efficiency of LAT:Bi3+,Mn4+ eventually exceeded 90%. The IQE and the thermal stability were all enhanced by around 30% compared to the non-co-doped samples, respectively. These results indicate that the Bi3+ → Mn4+ energy transfer strategy could play a pivotal role in the development of highly efficient red-emitting phosphors. The performance of the fabricated pc-WLEDs devices indicates that LAT:Bi3+,Mn4+ could be a promising red phosphor for near ultraviolet (n-UV) based warm pc-WLEDs.
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高影响因子
Journal of Materials Chemistry A
·
2013
·Vol. 1
·期 16
·5031-5036
·
IF 0
Chu Liang,Yongfeng Liu,Mingxia Gao,Hongge Pan
In this paper, we report a KOH-doped Mg(NH2)2–2LiH system with low operating temperatures and good cycling stability. The Mg(NH2)2–2LiH–0.07KOH sample can reversibly desorb/absorb ∼4.92 wt% hydrogen with a starting and peak dehydrogenation temperature of ∼75 °C and ∼120 °C, respectively, the lowest in the current Mg(NH2)2–2LiH system studied. Moreover, the cycling stability of de-/hydrogenation is also remarkably improved by KOH doping as the average capacity degradation of the Mg(NH2)2–2LiH–0.07KOH system is of only 0.002 wt% per cycle within 30 cycles. Detailed structural investigations reveal that during ball milling, the doped KOH can react with Mg(NH2)2 and LiH to convert to MgO, KH and Li2K(NH2)3, which work together to provide the synergistic effects of thermodynamics and kinetics on hydrogen desorption and absorption of the Mg(NH2)2–2LiH system upon heating, consequently inducing a significant improvement in hydrogen storage properties.
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DOI
Fuel Cells
·
2017
·Vol. 17
·期 5
·723-729
·
IF 1.706
Y. Yi,J. Huo,W. Wang
Molecular simulation method was firstly used for analyzing the energy of aluminum alloy systems alloyed by Mg, Ga, Zn and Mn. Based on the analyses, Al-Mg, Al-Ga, Al-Zn, Al-Mn alloys were metallurgically prepared. The structures, electrochemical activities and utilization ratios were characterized by X-ray diffraction patterns (XRD), anodic polarization measurement and galvanostatic discharge. The calculated energies of the aluminum alloy systems increase in the following order: Al< Al-Mn < Al-Mg < Al-Zn < Al-Ga. The absolute values of the open circuit potentials of the alloys measured in alkaline solution rank in the following orders: φ Al-Ga alloy > φ Al-Zn alloy > φ Al-Mg alloy > φ Al-Mn alloy and the order is consistent with the calculated energies. The results indicate that molecular simulation based on the first-principles is a useful method in the alloying design and thermodynamic performance prediction. Alloy additives Zn and Ga effectively change the open circuit potential of metal aluminum to a more negative potential. In addition, alloy additive Zn increases the charge transfer resistance of Al→Al 3+ , which decreases the discharge current density. Alloy additive Mg diminishes the grain size of the alloy and notably enhances the discharge current density. Alloy additive Mn improves the utilization ratio remarkably when discharging in alkaline solution.
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高影响因子
FOOD RESEARCH INTERNATIONAL
·
2026
·
IF 8.8
Mengchu Sun,Chenglong Zhang,Xichao Yin,Hongjin Tang
With the escalating environmental impact of petroleum-based plastics, natural polysaccharide-protein composite films have demonstrated significant potential as eco-friendly materials for food packaging. However, research on integrating bioactive metal-organic frameworks (MOFs) with Zein-based matrices to develop multifunctional active packaging remains underexplored. This study developed a novel composite film by encapsulating cinnamaldehyde (CA) within a magnesium-gallic acid-MOF (Mg-GA-MOF) and incorporating it into an ethyl cellulose (EC)/Zein matrix for pork preservation. The optimized CA@Mg-GA-MOF/EC/Zein-4% film with a thickness of 0.14 mm demonstrated remarkable mechanical properties, including a tensile strength of 55.75 MPa and an elongation at break of 5.46%. It exhibited low water vapor permeability at 5.87 × 10 −7 g·m −1 ·s −1 ·Pa −1 . The film also showed strong antibacterial activity, inhibiting growth by up to 99.73% against Escherichia coli and 89.26% against Staphylococcus aureus , as well as notable antioxidant properties with DPPH and ABTS scavenging rates of 59.70% and 49.71%, respectively. Furthermore, the composite film demonstrated sustained release characteristics for CA and GA and excellent biocompatibility. Non-covalent interactions between the components contributed to the improvement of functional properties of the film. In pork preservation trials, the composite film effectively delayed microbial growth, protein degradation, and lipid oxidation. Based on the total viable count safety limit (6 log CFU/g, GB 4789.2–2016), the film extended the shelf life of pork by 7 days compared to the control group. This study presents the first use of Mg-GA-MOF for the co-delivery of CA and GA within the EC/Zein film, offering a novel strategy for high-performance active food packaging.
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PubMed
高影响因子
CORROSION SCIENCE
·
2026
·
IF 8.5
Bingzhi Li,Bingce Liu,Enyu Guo,Keqiang Su,Zhihao Zhou,Yibo Ouyang,Xingchen Li,Huijun Kang,Zongning Chen,Xiao-Bo Chen,Tongmin Wang
Magnesium-lithium (Mg-Li) alloys are promising lightweight materials for engineering applications, but their use is limited by poor wear and corrosion resistance. To address those challenges, micro-arc oxidation (MAO) coatings were fabricated on Mg-Li alloy LA81 using electrolytes containing conductive ceramic nanoparticles (TiBCN). Results suggest that TiBCN enhances electrolyte conductivity and altering the arc discharge behavior, thereby reducing overall porosity of the resultant MAO coatings. Comprehensive characterization including measurements of coating thickness, microstructure, triboelectrochemical and corrosion resistance identify 2.5 g/L TiBCN as the optimal concentration. This formulation exhibits enhanced corrosion resistance, wear resistance and a notably low pore density. Three-dimensional evolution of corrosion in the optimized MAO coating was examined using synchrotron X-ray computed tomography. In corrosive environments, the combined effects of corrosion and expansion of corrosion products alter size, shape, and number of microdefects in MAO coatings over time. These changes were driven by the interactions between localized corrosion propagation and the accumulation and expansion of corrosion products. Ultimately, neighboring micro-defects merged, forming interconnected through-pores and accelerating MAO coating degradation.
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高影响因子
Materials Today Physics
·
2022
·
IF 11.021
Lu Yu,Wenhao Li,Zipei Zhang,Sitong Wei,Juan Li,Zhen Ji,Jingxuan Zhuo,Guiwu Lu,Weiyu Song,Shuqi Zheng
N-type Mg 3 Sb 2 thermoelectric material has a complex crystal structure and electronic structure, which is a new thermoelectric material with excellent application prospects. The state density and band structure of Mg 24 Sb 16 and Bi/Se/Pr–Se/Nd–Se doped Mg 24 Sb 16 are first-principles calculated. Se/Pr–Se/Nd–Se doped increases the density of states around the Fermi level. Bi-doped does not impact the band structure because the electronic structure between Sb and Bi are similar. The band gap of Pr–Se/Nd–Se doped becomes narrower, which is more conducive to carrier transport and increases carrier concentration than that of single-doped Se. The experimental results show that Pr and Nd replace Mg to provide more electrons for the system. The carrier concentration of the co-doped sample increases significantly, thus improving the power factor and optimizing the samples' electrical properties. The highest ZT value of the Mg 3.2 Sb 1.5 Bi 0.49 Se 0.01 sample is 1.21. Pr–Se/Nd–Se co-doped ZT values are 1.67 and 1.74, respectively, 38% and 43% higher than the Mg 3.2 Sb 1.5 Bi 0.49 Se 0.01 sample. Multi-element doped is an effective strategy to improve the thermoelectric properties of materials .
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.7
Chunlin Chi,Fan Liu,Shuai Jiang,Taoliang Zhou,Dawei Chen,Yujue Wang,Bin He,Qian Zhao
Interfacial engineering is a decisive factor in stabilizing layered oxide cathodes for sodium-ion batteries (SIBs). Here, a synergistic Li/Mg/Si tri-doping strategy is introduced to simultaneously modulate the bulk lattice and interfacial chemistry of a P2-type Na 0.7 Li 0.03 Mg 0.05 Ni 0.25 Mn 0. 6 Si 0.07 O 2 (LMNMS) cathode. The dopants expand the c-axis lattice (11.195 Å) and strengthen surface transition metal (TM)-O covalency, yielding improved Na + diffusion kinetics and interfacial stability. X-ray photoelectron spectroscopy (XPS) and in situ Raman analyses reveal reduced surface oxygen vacancies (15% vs. 22% in the undoped sample) and suppressed electrolyte-induced oxygen redox, effectively mitigating the P2 → O2 phase transition. Electrochemical impedance spectroscopy confirms a 45% decrease in charge-transfer resistance, indicating enhanced interfacial charge transport. Benefiting from this coupled bulk-surface optimization, LMNMS delivers a high reversible capacity of 165 ± 3.2 mAh g −1 at 0.1C, an excellent rate performance (92 ± 2.5 mAh g −1 at 5C), and 90.5 ± 1.8% capacity retention after 200 cycles. This work highlights how multi-site doping tailors both the electronic and chemical nature of electrode interfaces, offering a design paradigm for high-performance and interface-stable sodium-ion batteries.
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PubMed
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2026
·
IF 7.9
Hengxin Liu,Ruohan Li,Yueming Han,Yuntao Guan,Lixun Zhang
Intensive rice cultivation faces the dual challenges of low nitrogen use efficiency and heavy metal pollution risk. In this study, a previously developed magnesium–iron layered double hydroxide-loaded biochar (Mg/Fe-LDH@BC) composite was evaluated in paddy soil to determine its effects on nitrogen retention, heavy metal activity, crop growth and bacterial community organization. With the addition of the 1% Mg/Fe-LDH@BC, NH 4 + −N retention increased by 41.7% while NO 3 - −N accumulation decreased by 9.8%. Meanwhile, NH 3 volatilization decreased by 24.2%, and N 2 O emissions were reduced by over 50%. These changes were accompanied by increased rice biomass and grain dry mass, together with decreased concentrations of multiple geochemically reactive metals. Microbial community analysis showed that this material reshaped the topology of the bacterial co-occurrence network. The 1% Mg/Fe-LDH@BC material formed the most complex network (1446 nodes and 11,063 edges) and shifted key species from slow-growing groups (such as Syntrophus ) to metabolically active groups associated with carbon, iron, and sulfur cycles (e.g., Streptomyces , Pelobacter , and Thiobacillus ). This network exhibited both high connectivity and a highly modular structure, indicating a more interconnected and compartmentalized pattern of microbial associations. Furthermore, the porous structure of BC may create micro-anaerobic niches that support the survival of anaerobic taxa (e.g., Anaerolinea ). Although the LDH can directly immobilize heavy metals through physicochemical mechanisms, sulfur cycle-related bacteria (e.g., Desulfatitalea ) were identified as key species in the network, suggesting that microorganisms may contribute to in situ heavy metal immobilization through sulfide production.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Lejie Xu,Dong Shi,Guangguang Yang,Gang Chen,Fugen Song,Yuze Zhang,Shaolei Xie,Xiaowu Peng,Licheng Zhang,Yuxuan Wang,Yong Niu,Lijuan Li,Lianmin Ji
Neutral organic phosphate/FeCl 3 systems are widely employed for lithium extraction from high Mg/Li ratio brines; however, extractant degradation under prolonged operational conditions constrains process sustainability. This study investigates the degradation behavior of tributyl phosphate (TBP) and trioctyl phosphate (TOP) during lithium extraction, examining the influence of key process parameters (HCl/NaOH concentration, temperature, and FeCl 3 concentration) and evaluating the impact of degradation products on extraction performance. Single-factor experiments demonstrated that TOP exhibited superior stability compared to TBP, attributable to its longer carbon chains and greater steric hindrance. Both extractants displayed poorer acid resistance, whereas elevated FeCl 3 concentrations significantly suppressed degradation. On the basis of these findings, optimal process conditions are recommended: minimal HCl usage, NaOH concentration ≤ 4.0 mol·L −1 , and temperature ≤ 35 °C. Qualitative and quantitative 31 P NMR analyses confirmed that the primary degradation product of TBP was dibutyl phosphate (DBP), while that of TOP was di-(2-ethylhexyl) phosphoric acid (D2EHPA). Subsequent single-stage extraction experiments revealed that both DBP and D2EHPA diminished lithium extraction efficiency and Li/Mg separation factors, with D2EHPA exerting a more pronounced adverse effect. Across the concentration range of 0–0.5 mol·L −1 , D2EHPA reduced lithium extraction efficiency by 20%, compared to an 11% decrease caused by DBP. This study addresses a critical gap in understanding how extractant degradation affects long-term lithium extraction performance, and supplies feasible operational limits and formulation references for the industrial design and steady running of lithium separation processes.
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高影响因子
HYDROMETALLURGY
·
2026
·
IF 6.3
Zhengqin Zhang,Zheng Li,Longsheng Zhao,Bowen Wang,Zongyu Feng,Xiaowei Huang
Synergistic extraction mechanism in TBP system was investigated. • Synergistic extraction system performs better at low lithium concentration. • TBP-DEC system exhibits higher β Li/Mg than other synergistic systems. • Reducing O's electric potential in C O of synergistic agents enhance lithium selectivity. This study investigates the extraction and selective separation of Li from solutions with a high Mg/Li ratio based on a synergistic extractant system involving tributyl phosphate (TBP). Different synergistic agents were investigated, including ethyl acetate (EA), butyl acetate (BA), diethyl carbonate (DEC), methyl isobutyl ketone (MIBK), N,N-Diethylacetamide and N,N-di(1-methylheptyl)acetamide (N503). The result showed that TBP-DEC synergistic extraction system achieved the highest lithium extraction rate of 71.4% and lithium magnesium separation factor of 160, when the concentration of Li = 0.50 g/L and Mg/Li ratio = 200. Fourier Transform Infrared Spectroscopy (FT-IR) analysis revealed that TBP acted as the primary extraction agent for lithium extraction, while the O atom in the C O group of the synergistic agent participates in coordination with lithium. Additionally, the lithium extraction rate of the synergistic extractant system increased with the integrated peak area of the P O stretching vibration. Mechanism analysis reveals that increase of the negative charge density on the O atom in the C O group and reduction of the intermolecular steric hindrance of the synergistic agent can enhance the lithium selectivity of TBP.
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