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Magnetic metal organic framework for pre-concentration of ampicillin from cow milk samples 被引量:6
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作者 Ahmad Reza Bagheri Mehrorang Ghaedi 《Journal of Pharmaceutical Analysis》 SCIE CAS CSCD 2020年第4期365-375,共11页
The aim of this study is a present of a simple solvothermal synthesis approach to preparation of Cu-based magnetic metal organic framework(MMOF)and subsequently its application as sorbent for ultrasound assisted magne... The aim of this study is a present of a simple solvothermal synthesis approach to preparation of Cu-based magnetic metal organic framework(MMOF)and subsequently its application as sorbent for ultrasound assisted magnetic solid phase extraction(UAMSPE)of ampicillin(AMP)from cow milk samples prior to high performance liquid chromatography-Ultraviolet(HPLC-UV)determination.Characteristics of prepared MMOF were fully investigated by different techniques which showed the exclusive properties of proposed sorbent in terms of proper functionality,desirable magnetic property and also high specific surface area.Different influential factors on extraction recovery including sorbent dosage,ultrasonic time,washing solvent volume and eluent solvent volume were assessed using central composite design(CCD)based response surface methodology(RSM)as an operative and powerful optimization tool.This is the first report for determination of AMP using MMOF.The proposed method addressed some drawbacks of other methods and sorbents for determination of AMP.The presented method decreases the extraction time(4 min)and also enhances adsorption capacity(250 mg/g).Moreover,the magnetic property of presented sorbent(15 emu/g)accelerates the extraction process which does not need filtration,centrifuge and precipitation procedures.Under the optimized conditions,the proposed method is applicable for linear range of 1.0-5000.0 μg/L with detection limit of 0.29 μg/L,satisfactory recoveries(≥95.0%)and acceptable repeatability(RSD less than 4.0%).The present study indicates highly promising perspectives of MMOF for highly effective analysis of AMP in complicated matrices. 展开更多
关键词 magnetic metal organic framework Ultrasound assisted magnetic solid phase EXTRACTION AMPICILLIN Cow milk samples
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Facile Synthesis of the Magnetic Metal Organic Framework Fe_3O_4@UiO-66-NH_2 for Separation of Strontium 被引量:3
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作者 YIN Liang Liang KONG Xiang Yin +1 位作者 ZHANG Yao JI Yan Qin 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2018年第6期483-488,共6页
A magnetic metal organic framework(MMOF) was synthesized and used to separate Sr^2+ in aqueous solution. The shape and structure of prepared Fe3O4@UiO-66-NH2 were characterized, and the absorbed concentration of st... A magnetic metal organic framework(MMOF) was synthesized and used to separate Sr^2+ in aqueous solution. The shape and structure of prepared Fe3O4@UiO-66-NH2 were characterized, and the absorbed concentration of strontium was determined through inductively coupled plasma mass spectrometry. The results indicated that Fe3O4 and UiO-66-NH2 combined through chemical bonding. The experimental adsorption results for separation of Sr^2+ in aqueous solution indicated that the adsorption of Sr^2+ to Fe3O4@UiO-66-NH2 increased drastically from pH 11 to pH 13. The adsorption isotherm model indicated that the adsorption of Sr^2+ conformed to the Freundlich isotherm model(R2 = 0.9919). The MMOF thus inherited the superior qualities of magnetic composites and metal organic frameworks, and can easily be separated under an external magnetic field. This MMOF thus has potential applications as a magnetic adsorbent for low level radionuclide (90)Sr. 展开更多
关键词 magnetic metal organic framework(MMOF) Fe3O4@UiO-66-NH2 RADIOACTIVITY STRONTIUM Adsorbents
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Modeling of removal of an organophosphorus pesticide from aqueous solution by amagnetic metal–organic framework composite 被引量:2
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作者 Abdolraouf Samadi-Maybodi Mohsen Nikou 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2021年第12期323-335,共13页
Today,a variety of pesticides are used to fight plant pests in the world.The entry of these resistant pollutants into water resources can have devastating effects on human health and the environment,hence their remova... Today,a variety of pesticides are used to fight plant pests in the world.The entry of these resistant pollutants into water resources can have devastating effects on human health and the environment,hence their removal from the environment is a vital task.In the present work,the magnetic iron-based metalorganic framework(Fe_(3) O_(4)/MIL-101(Fe)) was synthesized by a simple and feasible method and characterized by FT-IR,XRD,BET,FESEM,TEM,TGA,and VSM techniques.The synthesized nanocom posite was successfully applied for the removal of fenitrothion(FEN) pesticide from the aqueous solutions.The isothermal and kinetic models were also investigated.The Langmuir isotherm model(type I) and pseudo-second-order kinetic model were more consistent in the adsorption process.The thermodynamic parameters of fenitrothion sorption were also calculated.The results revealed that the adsorption of fenitrothion onto Fe_(3) O_(4)/MIL-101(Fe) was spontaneous and endothermic under optimized conditions.Moreover,the removal efficiency of FEN was predicted using the developed fuzzy logic model.Four input variables including the initial concentration of FEN(mg·L^(-1)),pH of the solution,adsorbent dosage(mg).and contact time(min) versus removal efficiency as output were fuzzified by the usage of an artificial intelligence-based method.The fuzzy subsets consisted of Triangular and Trapezoidal membership functions(MFs) with six levels and a total of 23 rules in IF-THEN format which was applied on a Mamdani inference system.The obtained coefficient of determination value(R_(pred)^(2)=0.98205) proved the excellent accuracy of the fuzzy logic model as a powerful tool for the prediction of FEN removal efficiency. 展开更多
关键词 FENITROTHION magnetic iron-based metalorganic framework Fuzzy logic Adsorption ISOTHERM MAMDANI
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First-Principles Study of Two Dimensional Transition Metal Phthalocyanine-Based Metal-Organic Frameworks in Kagome Lattice 被引量:1
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作者 Hao-qi Chen Huan Shan +1 位作者 Ai-di Zhao Bin Li 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2019年第5期563-571,共9页
Transition metal phthalocyanines (TMPc) and relevant derivatives can act as pervasive molecules for their electronic, magnetic, and optical applications. Numerous researches based on TMPc are carried out, attempting t... Transition metal phthalocyanines (TMPc) and relevant derivatives can act as pervasive molecules for their electronic, magnetic, and optical applications. Numerous researches based on TMPc are carried out, attempting to synthesize novel two-dimensional (2D) metal-organic frameworks. Recently, some 2D poly-TMPc frameworks including FePc [J. Am. Chem. Soc. 133, 1203 (2011)], CoPc [Chem. Commun. 51, 2836 (2015)], and Ni-NiPc [J. Mater. Chem. A 6, 1188 (2018)] frameworks have been successfully synthesized experimentally. Meanwhile, potential applications in catalysis, gas storage, and spintronics were predicted by theoretical studies. Here, we propose a new kind of 2D poly-TMPc frameworks with kagome lattice (denoted as kag-TMPc) and systematically investigate their electronic and magnetic properties by employing first-principles calculations. We have demonstrated that the 2D kag-MnPc framework displays quite stable ferromagnetic ordering with Curie temperature about 125 K as indicated by Monte Carlo simulations based on Heisenberg model and prefers out-of-plane easy-magnetization axis. The 2D kag-CrPc framework is an ideal candidate for S=2 kagome antiferromagnet with RT3 magnetic order. Particularly, the investigations on optical absorption suggest that when the TMPc molecules are self-assembled into 2D kag- TMPc frameworks, their absorption wave bands are broadened, especially in visible region. 展开更多
关键词 TRANSITION metal PHTHALOCYANINE metal-organic framework KAGOME CURIE temperature magnetic order Optical ABSORPTION
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Synthesis, Crystal Structure, and Magnetic Properties of a Co Metal-organic Framework with Mixed Dicarboxylate and Tricarboxylate Ligands 被引量:1
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作者 LI Wen-Bin GAO Zhu-Qing GU Jin-Zhong 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2016年第2期257-263,共7页
One new mixed-ligand coordination polymer,namely[Co2(btc)(bpdc)(0.5)(py)3]n(1),was hydrothermally synthesized using biphenyl-2,4,4'-tricarboxylic acid(H3btc) as a main building block,along with two auxili... One new mixed-ligand coordination polymer,namely[Co2(btc)(bpdc)(0.5)(py)3]n(1),was hydrothermally synthesized using biphenyl-2,4,4'-tricarboxylic acid(H3btc) as a main building block,along with two auxiliary ligands(H2bpdc = 2,2'-bipyridine-5,5'-dicarboxylic acid and py =pyridine).The product 1 was characterized by IR spectroscopy,elemental,thermogravimetric,and single-crystal X-ray diffraction analyses.Single-crystal X-ray diffraction studies show that compound 1 possesses an intricate 3D metal-organic framework based on tetracobalt(Ⅱ) units.Magnetic susceptibility measurement indicates that compound 1 shows an antiferromagnetic coupling between the Co(Ⅱ) ions. 展开更多
关键词 metal-organic framework carboxylate ligand magnetic properties
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Crystal Engineering of Co(Ⅱ) Metal-organic Frameworks Based on the Hydrolysis Product of Letrozole and Coligands 被引量:1
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作者 KANG Hai-Xia FU Yu-Qin +3 位作者 JU Feng-Yang WANG Yu-Fang LI Xiao-Ling LIU Guang-Zhen 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2019年第8期1266-1274,共9页
The cyanide groups of letrozole(1-[bis(4-cyanophenyl)methyl]-1,2,4-triazole) were hydrolyzed into the carboxylic groups under alkaline conditions. Then the hydrolysis product(1-[bis(4-carboxylphenyl)methyl]-1,2,4-tria... The cyanide groups of letrozole(1-[bis(4-cyanophenyl)methyl]-1,2,4-triazole) were hydrolyzed into the carboxylic groups under alkaline conditions. Then the hydrolysis product(1-[bis(4-carboxylphenyl)methyl]-1,2,4-triazole, H2ltzda) reacted with Co(NO3)2·6H2O in the presence of different bipyridl-typed ligands under hydrothermal conditions. As a result, two new Co(Ⅱ) MOFs were obtained, formulated as [Co2(ltzda)2(bpp)2]n(1) and {[Co2(ltzda)2(bpy)]·4H2O}n(2)(bpp = 1,3-di(4-pyridyl)propane, bpy = 4,4’-bipyridine). Two MOFs have been characterized by single-crystal X-ray diffraction, thermogravimetric analysis and magnetic measure. 1 displays a 2D metal-organic framework containing wave layers and 2 shows a pillared-layer structure existing in a 2-fold interpenetrated mode. 展开更多
关键词 LETROZOLE Co(Ⅱ) metal-organic frameworks HYDROLYSIS magnetic PROPERTY coligand
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Magnetic Property of a Three-dimensional Copper Metal-organic Framework
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作者 高玉洁 田崇斌 +4 位作者 唐敬筱 崔美艳 周创宇 冯美玲 黄小荥 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2018年第9期1486-1493,共8页
A copper metal-organic framework(MOF) compound based on 2,5-thiophenedicarboxylic acid(H2 TDC) ligand, namely Cu(TDC)(H2 O)?DMA(1, DMA = N,N?-dimethylacetamide), has been synthesized in gram-scale via a on... A copper metal-organic framework(MOF) compound based on 2,5-thiophenedicarboxylic acid(H2 TDC) ligand, namely Cu(TDC)(H2 O)?DMA(1, DMA = N,N?-dimethylacetamide), has been synthesized in gram-scale via a one-pot solvothermal route in a high yield of 81.3%. Single-crystal X-ray analysis reveals that the structure of 1 features a three-dimensional(3D) open framework constructed by TDC interconnecting 1D chains of [-Cu(COO)(H2 O)Cu-]n. Thermal property was investigated by TG-MS. The magnetic measurements indicate the existence of weak antiferromagnetic interactions between the Cu2+ centers in 1. 展开更多
关键词 metal-organic framework COPPER solvothermal synthesis STRUCTURE magnetic property
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Synthesis, Structure, and Magnetic Properties of a New 2D Cobalt(Ⅱ) Metal-organic Framework
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作者 陈绪兴 李荣 +3 位作者 王帅华 蔡丽珍 易志国 黄新堂 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2017年第8期1375-1380,共6页
Rational design of magnetic materials with desired magnetic properties has attracted wide interest in recent decades. Herein, we present a new 2D cobalt(II) metal-organic framework, namely [Co(MQ)2(V2O6)2]n·... Rational design of magnetic materials with desired magnetic properties has attracted wide interest in recent decades. Herein, we present a new 2D cobalt(II) metal-organic framework, namely [Co(MQ)2(V2O6)2]n·4nH2O 1, which was hydrothermally synthesized by the reaction of Co(NO3)2·4H2O, N-methyl-4,4′-bipyridinium(MQ+) chlorine salt and NH4VO3. Single-crystal X-ray diffraction analysis reveals that 1 crystallizes in C2/c space group with a = 16.290(5), b = 7.815(2), c = 25.297(7) A, β = 108.459(5)°, V = 3054.8(15) A3, Z = 4, Dc = 1.890 g/cm3, μ = 1.791 mm-1, F(000) = 1748, the final R = 0.0444 and wR = 0.1208 with I 〉 2σ(I). The individual Co(II) is connected and well separated by diamagnetic [V2O6]2-linkers. Magnetic measurements confirm that 1 exhibits ferrimagnetic interactions. 展开更多
关键词 cobalt metal-organic framework hydrothermal reaction crystal structure magnetic property
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磁性金属有机骨架材料FeMPC的制备及其吸附性能研究
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作者 唐祝兴 宋宏权 +1 位作者 张岐龙 董华 《沈阳理工大学学报》 CAS 2024年第1期83-90,共8页
首先采用水热合成法制备金属有机骨架材料MIL-101(Fe),然后通过煅烧MIL-101(Fe)制备磁性金属有机骨架材料FeMPC,并用于吸附染料废水中的亚甲基蓝。使用扫描电镜、透射电镜、红外光谱等对制备的材料进行表征,考察FeMPC用量、振荡时间、p... 首先采用水热合成法制备金属有机骨架材料MIL-101(Fe),然后通过煅烧MIL-101(Fe)制备磁性金属有机骨架材料FeMPC,并用于吸附染料废水中的亚甲基蓝。使用扫描电镜、透射电镜、红外光谱等对制备的材料进行表征,考察FeMPC用量、振荡时间、pH等因素对吸附性能的影响。实验结果表明:当FeMPC用量为25 mg、振荡时间为70 min、溶液pH为8时,FeMPC对亚甲基蓝的吸附效果较好,吸附量为15.24 mg/g,吸附率为84.69%,材料重复使用次数不超过5次时能保持一定的吸附效果;FeMPC对亚甲基蓝的等温吸附符合Langmuir模型,吸附过程符合准二级动力学模型,属于化学吸附。 展开更多
关键词 磁性金属有机骨架材料 MIL-101(Fe) FeMPC 亚甲基蓝 吸附
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Fe_(3)O_(4)@ZIF-8-表面辅助激光解吸/电离质谱法检测美洲大蠊多肽
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作者 赖心仪 张美铃 +5 位作者 王丽丽 林婉真 许惠凤 李琦 胡筱 余丽双 《分析科学学报》 CAS CSCD 北大核心 2024年第1期29-34,共6页
本实验在室温下合成了以Zn作为金属中心,2-甲基咪唑作为连接剂的磁性金属有机框架材料Fe_(3)O_(4)@ZIF-8,以Fe_(3)O_(4)@ZIF-8作为固体基质,通过建立Fe_(3)O_(4)@ZIF-8-表面辅助激光解吸/电离质谱(SALDI-MS)法,实现了美洲大蠊小分子多肽... 本实验在室温下合成了以Zn作为金属中心,2-甲基咪唑作为连接剂的磁性金属有机框架材料Fe_(3)O_(4)@ZIF-8,以Fe_(3)O_(4)@ZIF-8作为固体基质,通过建立Fe_(3)O_(4)@ZIF-8-表面辅助激光解吸/电离质谱(SALDI-MS)法,实现了美洲大蠊小分子多肽IPMTAPGL-NH_(2)、LTAPGL-NH_(2)、SLMTGPGL-NH_(2)、SLHTAPGL-NH_(2)的快速检测。实验优化了基质浓度、检测限和点样方法等条件,考察了该基质对美洲大蠊多肽IPMTAPGL-NH_(2)的质谱信号影响。与传统基质辅助激光解析电离质谱法(MALDI-MS)相比,Fe_(3)O_(4)@ZIF-8-SALDI-MS法检测背景更干净,目标多肽响应更强,检测灵敏度更高。该法可应用于血样中美洲大蠊多肽IPMTAPGL-NH_(2)的快速检测。 展开更多
关键词 磁性金属-有机框架材料 Fe_(3)O_(4)@ZIF-8 美洲大蠊 小分子多肽
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Fe_(3)O_(4)与ZIF-9复合催化剂的制备及其快速降解亚甲基蓝的研究
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作者 何浩波 李海旭 +8 位作者 姜天男 徐良 汪龙 王嘉宁 彭培益 高紫赤 覃宇鑫 刘晓光 薛文东 《工程科学学报》 EI CSCD 北大核心 2024年第2期268-278,共11页
为了提高水中有机染料的降解速率,采用超声和溶剂热法制备Fe_(3)O_(4)/ZIF-9复合催化剂,该催化剂为立方状的金属有机骨架ZIF-9且表面附着有类球形Fe_(3)O_(4)颗粒.Fe_(3)O_(4)的加入为ZIF-9提供了更多的成核位点,同时Fe_(3)O_(4)/钴盐... 为了提高水中有机染料的降解速率,采用超声和溶剂热法制备Fe_(3)O_(4)/ZIF-9复合催化剂,该催化剂为立方状的金属有机骨架ZIF-9且表面附着有类球形Fe_(3)O_(4)颗粒.Fe_(3)O_(4)的加入为ZIF-9提供了更多的成核位点,同时Fe_(3)O_(4)/钴盐比例的变化也会影响ZIF-9的成核与生长.当Fe_(3)O_(4)/钴盐摩尔比为1∶1时,该催化剂在30 min内对亚甲基蓝的降解率达到95.1%,催化反应10 min的伪一阶动力学常数达到0.101 min^(-1),在pH为5~9范围内保持稳定的高催化性能.X射线光电子能谱(XPS)结果表明铁和钴位点之间存在电子转移,并且钴和铁的协同作用可以降低钴的还原电位,从而加速钴的价态变化,提升催化速率.电磁共振实验(EPR)结果显示该催化剂可以活化过一硫酸盐生成单线态氧(^(1)O_(2))、硫酸根自由基(SO-4·)和羟基自由基(·OH),进一步通过活性因子淬灭实验发现其中单线态氧为主要活性物种.由此可知,Fe_(3)O_(4)/ZIF-9通过铁和钴位点的氧化还原循环催化PMS不断生成^(1)O_(2)、·OH和SO^(-)_(4)·,共同将亚甲基蓝分子降解成二氧化碳和水.此外,磁滞回线测试(VSM)结果显示,该复合材料饱和磁化强度值为7.6 A·m^(2)·kg^(-1),表明Fe_(3)O_(4)能赋予复合催化剂良好的铁磁性,同时该催化剂循环使用4次后仍保持较高的降解率,表明该复合催化剂具有良好的回收性能和重复使用性能.本研究为有机染料等污染物的治理提供了新的技术和材料支撑. 展开更多
关键词 金属有机骨架 超声 溶剂热 Fe_(3)O_(4) ZIF-9 高催化速率 磁性可回收
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磁性金属-有机框架复合材料作为抗癌药物载体的研究进展
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作者 付巧芳 吴瑛 《中国兽医杂志》 CAS 北大核心 2024年第4期104-110,共7页
金属-有机框架(MOFs)凭借其高孔隙率和大比表面积所带来的载药空间,成为药物递送领域研究的热点。近年来,兴起了一种新型磁性框架复合材料(MFCs),MFCs保留了MOFs的载药率和生物安全性较高的性能,同时增加了磁靶向和磁热疗性能。本文对M... 金属-有机框架(MOFs)凭借其高孔隙率和大比表面积所带来的载药空间,成为药物递送领域研究的热点。近年来,兴起了一种新型磁性框架复合材料(MFCs),MFCs保留了MOFs的载药率和生物安全性较高的性能,同时增加了磁靶向和磁热疗性能。本文对MFCs的制备方法、种类、作为抗癌药物载体的特点以及药物递送时的作用方式进行综述,并对MFCs在实际应用中面临的挑战进行总结,以期为未来的研究工作提供参考依据。 展开更多
关键词 磁性-金属有机框架 癌症 磁性粒子 靶向 磁热疗
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锰基金属有机框架材料{[Mn_(2)(ina)_(4)(H_(2)O)_(2)]·2EtOH}_(n)的电子结构、磁性和吸附性能的理论研究
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作者 张坚 李萍 《原子与分子物理学报》 CAS 北大核心 2024年第2期73-79,共7页
本文采用密度泛函理论研究了锰基金属有机框架(Mn-MOF)材料{[Mn_(2)(ina)_(4)(H_(2)O)_(2)]·2EtOH}_(n)的电子性质,磁学性质及吸附二氧化碳的性能,结果表明:该Mn-MOF材料是一种反铁磁耦合材料,其高的CO_(2)结合亲和力主要归因于CO_... 本文采用密度泛函理论研究了锰基金属有机框架(Mn-MOF)材料{[Mn_(2)(ina)_(4)(H_(2)O)_(2)]·2EtOH}_(n)的电子性质,磁学性质及吸附二氧化碳的性能,结果表明:该Mn-MOF材料是一种反铁磁耦合材料,其高的CO_(2)结合亲和力主要归因于CO_(2)(作为Lewis碱的氧孤对电子)到不饱和金属位点(Lewis酸)的较高电荷转移.本文也对实验中报道的对CO_(2)/N_(2)烟气混合物有高选择性CO_(2)吸附能力进行了验证,理论计算值与实验值有着很好的一致性. 展开更多
关键词 金属有机框架材料 密度泛函理论 磁性 二氧化碳吸附
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磁性金属钴/碳微波吸收剂粉末的制备和性能
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作者 李子琦 丁学科 陈传盛 《粉末冶金材料科学与工程》 2024年第4期330-340,共11页
为克服磁性金属密度大、磁损耗模式单一等不足,分别以Co盐和均苯三甲酸为原料和有机配体,利用沉淀法制备Co基金属有机框架,通过煅烧处理合成磁性金属Co/C复合微波吸收剂粉末,研究煅烧温度对Co/C微波吸收剂形貌和微波吸收性能的影响。结... 为克服磁性金属密度大、磁损耗模式单一等不足,分别以Co盐和均苯三甲酸为原料和有机配体,利用沉淀法制备Co基金属有机框架,通过煅烧处理合成磁性金属Co/C复合微波吸收剂粉末,研究煅烧温度对Co/C微波吸收剂形貌和微波吸收性能的影响。结果表明:煅烧温度对Co/C微波吸收剂的形貌和性能有很大影响,经过500℃和600℃煅烧分别获得分散均匀的颗粒结构和多孔骨架结构,700℃和800℃煅烧获得链式棒状结构。800℃煅烧的样品表现出最佳电磁波吸收性能,当测试样品厚度为4.5 mm时,其在13.76 GHz处的最大反射损耗和有效吸收带宽分别达到−35 dB和0.56 GHz。微波吸收性能的提高归因于多重损耗机制(涡流和交换共振等),适宜的电磁参数和衰减常数,以及多孔结构与多种组分之间的协同效应。 展开更多
关键词 微波吸收剂 金属有机框架 磁性金属 Co金属 碳化
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Composition Optimization and Microstructure Design in MOFs-Derived Magnetic Carbon-Based Microwave Absorbers:A Review 被引量:11
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作者 Honghong Zhao Fengyuan Wang +3 位作者 Liru Cui Xianzhu Xu Xijiang Han Yunchen Du 《Nano-Micro Letters》 SCIE EI CAS CSCD 2021年第12期383-415,共33页
Magnetic carbon-based composites are the most attractive candidates for electromagnetic(EM)absorption because they can terminate the propagation of surplus EM waves in space by interacting with both electric and magne... Magnetic carbon-based composites are the most attractive candidates for electromagnetic(EM)absorption because they can terminate the propagation of surplus EM waves in space by interacting with both electric and magnetic branches.Metal-organic frameworks(MOFs)have demonstrated their great potential as sacrificing precursors of magnetic metals/carbon composites,because they provide a good platform to achieve high dispersion of magnetic nanoparticles in carbon matrix.Nevertheless,the chemical composition and microstructure of these composites are always highly dependent on their precursors and cannot promise an optimal EM state favorable for EM absorption,which more or less discount the superiority of MOFs-derived strategy.It is hence of great importance to develop some accompanied methods that can regulate EM properties of MOFs-derived magnetic carbon-based composites e ectively.This review comprehensively introduces recent advancements on EM absorption enhancement in MOFs-derived magnetic carbon-based composites and some available strategies therein.In addition,some challenges and prospects are also proposed to indicate the pending issues on performance breakthrough and mechanism exploration in the related field. 展开更多
关键词 magnetic carbon-based composites metalorganic frameworks Composition optimization Microstructure design EM absorption enhancement
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Synthesis, Structure, Adsorption Space and Magnetic Properties of Ni-oxalate Porous Molecular Magnet 被引量:2
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作者 Agustin Rios-Ramos Christymarie Rivera-Maldonado +4 位作者 Geidy Ines Garcia-Acosta Cesar ManuelLozano-Paulino Pedro Manuel Fierro-Mercado Luis Fuentes-Cobas Rolando Marcos Roque-Malherbe 《材料科学与工程(中英文A版)》 2012年第3期284-301,共18页
关键词 物理吸附 分子磁体 合成金属 镍离子 磁学性质 草酸盐 空间群 结构相
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二维kagome晶格过渡金属酞菁基异质结的电子性质
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作者 姜舟 蒋雪 赵纪军 《物理学报》 SCIE EI CAS CSCD 北大核心 2023年第24期269-280,共12页
过渡金属酞菁分子作为二维有机金属框架材料的重要构建单元,在光学、电子学、磁学等领域展示了潜能.经理论预测,一系列具有kagome晶格的二维磁性过渡金属酞菁框架材料(kag-TMPc)在自旋电子学、光电子学领域具有应用前景.本文采用第一性... 过渡金属酞菁分子作为二维有机金属框架材料的重要构建单元,在光学、电子学、磁学等领域展示了潜能.经理论预测,一系列具有kagome晶格的二维磁性过渡金属酞菁框架材料(kag-TMPc)在自旋电子学、光电子学领域具有应用前景.本文采用第一性原理计算,研究了叠状kag-TMPc基异质结中层间耦合对电磁性质的影响.结果表明kag-MnPc基异质结能够保持单层材料的带隙特性,带隙在0.17 eV左右,其中AA和AB堆垛的kag-MnPc/ZnPc为铁磁性半导体,磁交换能量在40 meV以上;kag-MnPc/MnPc在从AA堆叠转变至AB堆叠的过程中,由磁性半金属变成为磁性半导体.特别地, AB堆叠的kag-CuPc/CoPc异质结具有亚铁磁半导体特征,并且能带排列方式与层间距相关:层间距在平衡位置时,两个自旋方向能带排列均为Ⅰ型;当层间距增大0.2?时,在自旋向上能带为Ⅰ型能带排列,自旋向下为Ⅱ型能带排列,具备自旋相关的光电“开关”特性.本文的结果表明,层间耦合效应是调控二维磁性有机材料电子性质的有效方式,为设计磁场调制的新型电磁和光电器件提供了理论参考. 展开更多
关键词 磁性材料 异质结 第一性原理计算 有机金属框架
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纳米复合材料Fe_(3)O_(4)@MIL-100(Fe)对亚甲基蓝的吸附
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作者 韩艳爽 唐祝兴 《辽宁化工》 CAS 2023年第3期313-318,共6页
采用溶剂热法来合成Fe_(3)O_(4)@MIL-100(Fe)纳米材料,通过红外光谱、扫描电子显微镜、透射电子显微镜、能谱和磁性等多种方法表征测试。从测试结果能够得知MIL-100(Fe)成功包覆在Fe_(3)O_(4)上。用Fe_(3)O_(4)@MIL-100(Fe)纳米材料作... 采用溶剂热法来合成Fe_(3)O_(4)@MIL-100(Fe)纳米材料,通过红外光谱、扫描电子显微镜、透射电子显微镜、能谱和磁性等多种方法表征测试。从测试结果能够得知MIL-100(Fe)成功包覆在Fe_(3)O_(4)上。用Fe_(3)O_(4)@MIL-100(Fe)纳米材料作为吸附剂吸附亚甲基蓝溶液,考察了振荡时间、溶液pH、吸附剂用量、亚甲基蓝水试剂浓度等因素对吸附过程的影响。结果表明:振荡时间为40 min、pH为8、Fe_(3)O_(4)@MIL-100(Fe)微球用量为4 mg、亚甲基蓝水试剂浓度为6 mg·L^(-1)时为最佳条件,最大饱和吸附量为9.6886 mg·g^(-1)。此外动力学与热力学结果表明室温下利于反应进行且符合准一级动力学模型。 展开更多
关键词 磁性金属有机骨架Fe_(3)O_(4)@MIL-100(Fe) 亚甲基蓝 吸附 染料废水
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Syntheses, Structures, Fluorescence and Magnetism of Six Lanthanide Metal-organic Frameworks Based on Silicon-centered Tetrahedral Ligand 被引量:4
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作者 LI Yang-xue XUE Ming GUO Li-jia HUANG Lin CHEN Si-ru QIU Shi-lun 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2013年第2期196-200,共5页
Multifunctional lanthanide metal-organic frameworks(MOFs), M(H4TCPS)(H20)l.5[M=Tb(JUC-95a), Er(JUC-95b), Dy(JUC-95c), Tm(JUC-95d), Y(JUC-95e) and Pr(JUC-95f); H4TCPS=tetrakis(4-carboxyphenyl)silane... Multifunctional lanthanide metal-organic frameworks(MOFs), M(H4TCPS)(H20)l.5[M=Tb(JUC-95a), Er(JUC-95b), Dy(JUC-95c), Tm(JUC-95d), Y(JUC-95e) and Pr(JUC-95f); H4TCPS=tetrakis(4-carboxyphenyl)silane] were synthesized via the reaction of the lanthanide metal ions(Ln3) with a rigid silicon-centered tetrahedral carbo- xylate ligand H4TCPS via a hydrothermal synthesis method. X-Ray diffraction(XRD) analyses reveal that they are extremely similar in structure and crystallized in a monoclinic system with space group C2/c. Two eight-coordinated metal centers and four tetrahedral H4TCPS groups constructed a paddle-wheel building block. The paddle-wheel buil- ding blocks assembled with each other via one oxygen bridge from a water molecule to lead to a 1D infinite inorganic rod-shaped chain, --Y--O--C--O--Y--, along the [001] direction. These 1D inorganic rod-shaped chains linked with the phenyl groups of the tetrahedral HaTCPS ligand to form a 3D framework. In addition, the luminescent and magnetic properties of these compounds show that they could be potential antiferromagnetic and fluorescent mate- rials. 展开更多
关键词 metal-organic framework Tetrakis(4-carboxyphenyl)silane magnetic property FLUORESCENCE
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Fe/C多孔碳材料制备及其涂层棉织物的吸波性能
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作者 丁娟 刘阳 +3 位作者 张晓飞 郝克倩 宗蒙 孔雀 《纺织学报》 EI CAS CSCD 北大核心 2023年第2期191-198,共8页
为提高涂层棉织物的吸波性能,采用溶液混合法制备磁性金属有机框架(Fe-MOF),通过高温热解制备Fe/C多孔碳材料,以聚丙烯酸酯为黏合剂,将Fe/C多孔碳材料复合在棉织物上制备柔性纺织复合材料。借助X射线衍射仪、场发射扫描电子显微镜、振... 为提高涂层棉织物的吸波性能,采用溶液混合法制备磁性金属有机框架(Fe-MOF),通过高温热解制备Fe/C多孔碳材料,以聚丙烯酸酯为黏合剂,将Fe/C多孔碳材料复合在棉织物上制备柔性纺织复合材料。借助X射线衍射仪、场发射扫描电子显微镜、振动样品磁力计与热重分析仪分别对Fe/C多孔碳材料的结构、微观形貌、磁性能进行表征与测试,使用矢量网络分析仪对Fe/C多孔碳材料和涂层棉织物的吸波性能进行分析。结果表明:在频率为4.6 GHz时,Fe/C多孔碳材料的反射损耗值最小为-60.4 dB,小于-10 dB的有效带宽为1.4 GHz,最佳厚度为4.3 mm;涂层棉织物的反射损耗值最小为-53.94 dB,小于-10 dB的有效频宽为X波段(频率为8.2~12.4 GHz),最佳涂层厚度为4.5 mm;Fe/C多孔碳材料涂层棉织物厚度达到3.5 mm以上时,其吸波性能优良。 展开更多
关键词 铁基金属有机框架 Fe/C多孔碳材料 柔性纺织复合材料 涂层棉织物 吸波性能
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