MINERALS ENGINEERING
·
2020
·
IF 3.795
Qianwen Chen,Shuainan Ni,Guanghua Ai,Tao Zhang,Xiaoqi Sun
Cleaner and lower-cost recovery and separation of samarium(III) and cobalt(II) from waste SmCo magnets can effectively alleviate supply risks of the strategic metals. Based on this goal, a family of renewable, low-cost, biocompatible, non-toxic fatty acid-based ionic liquids (FAILs), including [N1888][DA], [N1888][LA] and [N1888][PA] were synthesized and developed for the separation of Sm(III)/Co(II) from samarium-cobalt simulated solution. The effect factors, i.e. equilibrium time, FAIL molar concentration, salting-out agent concentration and initial pH of aqueous solution were investigated. The extraction mechanism was proposed to be ion association by slope analysis and FT-IR. Under the optimized extraction conditions, a higher purity CoCl 2 (99.5%) product was obtained by a simple extraction-stripping-washing process with the consumption of Na 2 C 2 O 4 and NH 3 ·H 2 O. The produced salty wastewater with lower concentration from the process could be recycled. Sm 2 O 3 with a purity of 99% were obtained by roasting the Sm 2 (C 2 O 4 ) 3 at 800 °C for two hours. The whole process was simple and sustainable, illustrating its potential for industrial applications.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Jiazhuang Chen,Yuke Zhong,Dongdong Wang,Mei Li,Wei Han,Yalan Liu,Weiqun Shi
The variable valence rare earth elements are difficult to separate due to their similar properties and intermediate valence states in molten salts. In order to realize their efficient and selectivity separation, the properties and separation methods of Sm, Yb, and Eu have been investigated in a low-temperature AlCl 3 -NaCl molten salt. It has been found that the oxidation reactions of different Ln(II) to Ln(III) have different potentials. The Ln(II)/Ln(III) reaction is also irreversible when the AlCl 3 content is less than 50 mol%, Ln(III) exists in the form of LnCl 3 precipitation. Therefore, selectively modulating the valence of Sm, Yb, and Eu by electrochemical methods can achieve their separation. The LnCl 3 produced from the Ln(II) electro-oxidation precipitates and separates from the other unoxidized soluble Ln(II) in AlCl 3 -NaCl melt. The efficient separation of Ln(II) in AlCl 3 -NaCl can be achieved by pulse potentiostatic electrolysis. Under these conditions, the separation factors of Sm-Eu, Sm-Yb, and Yb-Eu can reach 10 3 . The maximum removal of Ln(II) exceeded 99 % with a maximum current efficiency of more than 90 %. Most importantly, the separation of variable valence rare earth elements has been realized in a low-temperature AlCl 3 -NaCl melt.
研究领域:
冶金学
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材料科学
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DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2026
·Vol. 109
·期 3
·e70653
·
IF 4.2
Bowen Yin,Haoran Ren,Weijia Guo,Chongyang Zhang,Xingchen Zhang,Yutian Lu,Hui Zhang,Zhenxing Yue
Aluminum nitride (AlN) ceramics are widely used in high-power electronic devices due to their excellent electrical insulation, high thermal conductivity, and chemical stability. Doping with rare-earth oxides is a common modification method for AlN ceramics that enhances sintering behavior and thermal conductivity but simultaneously alters defect states, thereby affecting electrical properties. The evolution of these defects and their influence on electrical transport and heat conduction remain unclear. Herein, the defect behavior, electrical insulation, and thermal conduction of Y 2 O 3 , La 2 O 3 , and Sm 2 O 3 -doped AlN ceramics are systematically compared. A combination of direct current (DC) conductivity, electrochemical impedance spectroscopy (EIS), dielectric spectroscopy, and thermally stimulated depolarization current (TSDC) analyses confirms a pronounced defect “cleaning effect” induced by rare-earth dopants, with an efficiency ranking of Sm > La > Y. The results reveal that oxygen substituting for nitrogen sites and aluminum vacancies dominate the low- and high-temperature conduction processes, respectively. The influence of rare-earth doping on thermal conductivity is also evaluated. Notably, the samples doped with 4 wt% Y 2 O 3 exhibit the best electrical insulation and the highest thermal conductivity. This work provides important insights into achieving synergistic optimization of the electrical and thermal properties of AlN ceramics through defect engineering.
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DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Chaoran He,Shanshan Zhao,Jiafei Lyu,Bofeng Zhang,Rongrong Zhang,Guozhu Liu
The severe carbon deposition that plagues conventional Ni catalysts in dry reforming of methane (DRM) originates from the kinetic mismatch between CH 4 cracking and CO 2 dissociation. Here, we design an atomically thin Sm-doped MgAlO x overlayer to encapsulate Ni nanoparticles, creating a confined reaction environment that intrinsically couples these two critical steps. The Sm-induced electron donation to Ni accelerates CH 4 dissociation by weakening the C-H bonds, while the Sm-doped thin overlayer with rich oxygen vacancies facilitates the rapid decomposition of CO 2 -derived carbonate intermediates (m-CO 3 2− ) and shortens the diffusion path for the resultant active oxygen species to gasify surface cavrbon precursors. The optimized catalyst achieves high conversions of CH 4 (91.0%) and CO 2 (94.0%) at 800 °C, reducing carbon deposition from 39.47% to 9.50%, and maintains stable performance over 100 h. This work demonstrates that precise reducible-oxide overlayers engineering can intrinsically align reaction kinetics to break the classical deactivation cycle of Ni-based catalysts in DRM.
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DOI
高影响因子
DRUG METABOLISM AND DISPOSITION
·
2026
·
IF 3.6
Bo Sun,Zihui Jin,Xinwei Li,Xia Xiao,Zhenwei Jiang,Wei Xie,Leshuai Zhang,Pan Deng
Recent advances in lipid nanoparticle (LNP) delivery systems have enabled the development of mRNA vaccines and oligonucleotide therapeutics. Reliable hepatic in vitro systems are essential for the evaluation of the biodegradation of LNP components. SM-102 is an important ionizable lipid used in Moderna’s LNP-mRNA vaccine. In this study, we compared the metabolism of SM-102 using three in vitro hepatic models, including liver microsomes, 2D hepatocyte cultures and 3D liver spheroids prepared from primary rodent hepatocytes and HepG2 cells. An ultra-high-performance liquid chromatography high-resolution mass spectrometry (UHPLC-HRMS) method was developed to detect and characterize SM-102 metabolites. A 2,4-dinitrophenylhydrazine (DNPH) derivatization method was developed to further capture and characterize the potential carbonyl products. Following incubation of SM-102 with liver microsomes from human, monkey, dog, rat, and mouse, seven metabolites were identified, with oxidation to carbonyl-containing metabolites representing the predominant pathway. In mouse 2D hepatocytes and 3D liver spheroids, six metabolites were detected, and the major metabolic pathways included N-dealkylation (M6), acetylation (M7), and hydrolysis (M8). In rat 2D hepatocyte cultures, six metabolites were detected, with M6 and M8 as the major metabolites. In contrast, β-oxidation-related metabolites (M10 and M11) were the major metabolites detected in rat 3D hepatocyte spheroids. Comparable metabolic profiles of SM-102 were observed in HepG2 2D cultures and 3D spheroids, with hydrolysis and N-dealkylation as the predominant metabolic pathways. Taken together, this study characterized the metabolic profiles of SM-102 across three in vitro hepatic models, and comparable metabolic profiles were observed between 2D hepatocytes and 3D spheroids prepared from primary mouse hepatocytes and HepG2 cells. These findings provide useful information for selecting appropriate in vitro models to ensure the reliable evaluation of ionizable lipid biodegradation.
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产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2016
·
IF 4.82
Dong Yan,Fei-Fei Mao,Jiang-Gao Mao
A series of lanthanide boroantimonates, namely, LnBSb2O8 (Ln = Sm 1, Eu 2, Gd 3, and Tb 4) have been successfully synthesized by high temperature solid-state reactions for the first time. They are isostructural and feature novel three-dimensional (3D) frameworks composed of 2D [Sb3O12]9– layers interconnected by 1D [SbBO7]6– chains with remaining BO3 groups hanging on the walls of the 1D 6-membered-ring (MR) tunnels along the a-axis, and the lanthanide ions filled in the voids of the anionic structure. They exhibit high thermal stability (up to 900 °C). Luminescent studies suggest that compounds 1, 2, and 4 have potential application as orange, red, and green light luminescent materials, respectively. Magnetic measurements reveal ferromagnetic coupling interactions in compound 3 and antiferromagnetic coupling interactions between magnetic centers in compounds 1, 2, and 4.
研究领域:
无机化学
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材料科学
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固态化学
·
发光学
·
磁学
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DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2023
·
IF 4
Wenxuan Wang,Shan Hu,Zihan Liu,Zelang Jian,Wen Chen
The NASICON-type (Na 1+x Zr 2 Si x P 3-x O 12 , 0≤x ≤ 3) sodium-ion solid state electrolyte (SSE) has emerged as an alternative for liquid electrolyte due to its good chemical/electrochemical stability, high thermal stability and high safety. However, the insufficient ionic conductivity and poor understanding of Na + transport mechanism hinder the further development of sodium-ion SSE. Herein, we report Sm modified Na 3+x Zr 2-x Sm x Si 2 PO 12 (0≤x ≤ 0.4) electrolytes with a highest ionic conductivity of 2.25 × 10 −3 S cm −1 at 25 °C when x = 0.2. The introduction of Sm element adjusts the Si/P ratio in NASICON phase and densifies the electrolyte pellets by formation of Na 3 Sm(PO 4 ) 2 . To get a deep insight into the enhanced mechanism of Na + transport in grains, low-temperature electrochemical impedance spectra (LT-EIS) and Jonscher's power law relationship are employed to analyze the electrical behavior of grains. The results demonstrate that the regulation of Si/P ratio can evoke lower migration energy, more charge carrier concentration and higher hopping frequency , which synergistically improve the ionic conductivity in grains.
研究领域:
材料科学
·
电化学
·
储能
·
固体离子学
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DOI
高影响因子
JOURNAL OF STRUCTURAL CHEMISTRY
·
2022
·Vol. 63
·期 6
·845-853
·
IF 1.004
Chen X.,Gao R. -L.,Li B.,Wang H. -M.
Abstract Reaction of SmCl 3 ·6H 2 O with 3 equiv. of dihydroxodiphenylarsonium chloride [Ph 2 As(OH) 2 ]Cl resulted in the first structurally characterized lanthanide complex of organoarsinate [Sm(μ-O 2 AsPh 2 ) 3 ]. Single crystal X-ray diffraction reveals that this complex belongs to the trigonal system, \(R\bar{3}\) space group, with a = 24.077(3) Å, b = 24.077(3) Å, c = 10.708(1) Å, β = 120°, V = 5375.8(1) Å 3 and Z = 6. This homoleptic compound features a 1D polymer arrangement in which two Sm atoms are bridged by three diphenylarsinate [Ph 2 AsO 2 ] – ligands under syn,syn μ 2 –η 1 :η 1 bridging mode. The coordination number of Sm center is 6, giving an almost perfect octahedron geometry. The antibacterial activity of [Sm(μ-O 2 AsPh 2 ) 3 ] is much weaker than the free ligand [Ph 2 As(OH) 2 ]Cl.
研究领域:
无机化学
·
生物化学
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DOI
高影响因子
JOURNAL OF ETHNOPHARMACOLOGY
·
2024
·
IF 4.8
Qing-Yu Lu,Zhao-Jie Wang,Li-Yu Bai,Wen-Biao Zu,Zhong-Shun Zhou,Yan-Yan Zhu,Yun-Li Zhao,Xiao-Dong Luo
Ethnopharmacological relevance Caryopteris trichosphaera W. W. Sm., a traditional ethnic medicine, was recorded in the Compendium of Materia Medica for treating wound infection by pathogenic infection. However, its antibacterial potential and bioactive compositions against drug-resistant bacteria need to be validated. Aim of the study To investigate the chemical constituents of C. trichosphaera and explore its anti-MRSA component in vitro and in vivo , together with the antibacterial mechanism. Materials and methods Bioactive constituents investigation was carried out by phytochemical method and antibacterial screening. The antibacterial mechanism was predicted by network pharmacology, which was further validated by time-kill analysis, membrane function tests, multigenerational resistance induction assay and biofilm test, and metabolomics analysis in vitro. In addition, MRSA-induced epidermal infection in mice was selected to evaluate its pharmacological effect in vivo . Results Six antibacterial diterpenoids against MRSA and VRE with MIC values 4–32 μg/mL from C. trichosphaera were reported for the first time, in which the major compound cativic acid ( 1 ) disrupted MRSA cell membranes by modulating permeability, depolarization, and fluidity while increasing reactive oxygen species (ROS) and malondialdehyde (MDA) levels. It also displayed remarkable anti-biofilm activity without inducing bacterial resistance or cytotoxicity. Moreover, cativic acid affected MRSA biosynthesis of cofactors, amino acid biosynthesis, nucleotide metabolism by metabolomics analysis. Furthermore, cativic acid accelerated wound healing in MRSA-infected mouse skin wounds, even better than vancomycin. Conclusions The results supported the traditional use of C. trichosphaera , and presented unreported anti-MRSA agent, cativic acid, as a plant-derived bactericide in vitro and in vivo for the first time.
研究领域:
药理学
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微生物学
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民族药理学
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植物化学
·
传染病学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2016
·Vol. 41
·期 2
·709-716
·
IF 3.277
Yuexin Wang,Yanhua Song,Yi Li,Tingting Cui,Xiuqing Zhou,Ye Sheng,Keyan Zheng,Hongpeng You,Haifeng Zou
LuVO4:Eu3+ nano/microcrystals with different morphologies/sizes including nanoparticles, nanosheets, nanodisks, nanoquadrangles, sub-microflakes, microspheres, and bulks were successfully synthesized by a mild solvothermal process using tartaric acid (TA) as the template. The amount of tartaric acid (TA) and the initial pH value play vital roles in controlling the morphologies of LuVO4 products. Besides, the reaction temperature was responsible for the generation of pure LuVO4 crystals in the presence of TA. Based on this, the possible formation mechanism of multi-morphologies was proposed. Furthermore, the dependence of luminescence performance on morphology has been discussed in detail. The LuVO4:Ln3+ (Ln = Tm3+, Er3+, Sm3+, Eu3+) nanoparticles show the characterized transition of Ln3+ and give bright blue, green, orange-red and red emission. Moreover, blue-green, green-yellow, pink, yellow-pink and white light can be obtained by adjusting the amount of doped Ln3+ ions and the corresponding concentrations of the LuVO4 host. This general and simple method may be of much significance in the synthesis of many other rare earth inorganic materials.
研究领域:
材料科学
·
光学
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DOI
高影响因子
IEEE TRANSACTIONS ON ELECTRON DEVICES
·
2025
·Vol. 72
·期 12
·6872-6878
·
IF 3.2
Xiyuan Zhang,Wenhua Zou,Junhong Duan
In this study, titanium dioxide (TiO ${}_{{2}}\text {)}$ nanoparticles co-doped with varying ratios of Eu and Sm were synthesized using a hydrothermal method. The energy bandgap ( ${E}_{\text {g}}\text {)}$ and conduction band minimum (CBM) of TiO2 nanoparticles doped with 0.45 at% Sm@0.1 at% Eu were adjusted from 3.43 and −3.95 eV to 3.30 and −3.53 eV, respectively, determined from ultraviolet–visible (UV–Vis) absorption spectroscopy and ultraviolet photoelectron spectroscopy (UPS) measurements compared to undoped TiO2. CdSe quantum dot-sensitized solar cells (QDSCs) based on TiO2 doped with 0.45 at% Sm@0.1 at% Eu achieved an optimal power conversion efficiency (PCE) of 4.37%. Electrochemical impedance spectroscopy (EIS) revealed that the decrease in chemical capacitance ( ${\textit C}_{\mu }\text {)}$ and the increase in recombination resistance ( ${\textit R}_{\text {rec}}\text {)}$ of QDSCs based on 0.45 at% Sm@0.1 at% Eu-doped TiO2 photoanodes facilitate charge extraction and suppress charge recombination at the TiO2/electrolyte (EL) interface compared to undoped one.
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DOI
高影响因子
Journal of Advanced Dielectrics
·
2019
·
IF 0
Yong Li,Jun Zhao,Xinglei Zhang,Qiannan Jia,Xihong Hao
Solid solutions of the lead-free 0.88( Na 0 . 5 Bi 0 . 5 ) TiO 3 -0.12( Ba 1 − x Sm x ) TiO 3 (NBT-BT: x Sm) ferroelectric ceramics were synthesized by solid state reaction. The doping of Sm promotes the structure of the ceramics to transform toward morphotropic phase boundary, and it decreases the grain size of the ceramics. With the increase of Sm content, the ferroelectric properties are improved gradually, where the ferroelectric polarization increases and the coercive field decreases. Sm doping induces a dielectric anomaly with obvious frequency dispersion at a low temperature, exhibiting the transition from the ferroelectric to relaxor state. Moreover, the photoluminescence spectra of NBT-BT: x Sm ceramics exhibit a strong orange emission upon blue light excitation of the 400 nm to 500 nm. The emission intensities are strongly dependent on the Sm doping concentration, which reached the optimal value as the doping concentration is 0.7%. These results suggest that the NBT-BT: x Sm ceramics may have significant technological promise in novel multifunctional devices.
研究领域:
材料科学
·
物理学
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DOI
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