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Microstructural characterization and mechanical properties of(TiC+TiB)/TA15 composites prepared by an in-situ synthesis method
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作者 Zhi-yong Zhang Jiao-jiao Cheng +3 位作者 Jia-qi Xie Shi-bing Liu Kun Shi Jun Zhao 《China Foundry》 SCIE EI CAS CSCD 2024年第2期168-174,共7页
Titanium matrix composites reinforced with ceramic particles are considered a promising engineering material due to their combination of high specific strength,low density,and high modulus.In this study,the TA15-based... Titanium matrix composites reinforced with ceramic particles are considered a promising engineering material due to their combination of high specific strength,low density,and high modulus.In this study,the TA15-based composites reinforced with a volume fraction of 10% to 25%(TiB+TiC)were prepared using powder metallurgy and casting technique.Microstructural characterization and phase constitution were examined using optical microscopy(OM),scanning electron microscopy(SEM),and X-ray diffraction(XRD).In addition,the microhardness,room temperature(RT)and high temperature(HT)tensile properties of the composites were evaluated.Results revealed that the reinforcements are distributed uniformly even in the composites with a high volume of TiB and TiC.However,as the volume fraction exceeds 15%,TiB and TiC particles become coarsening and exhibit rod-like and dendritic-like morphology.Microhardness increases gradually from 321.2 HV for the base alloy to a maximum of 473.3 HV as the reinforcement increases to 25vol.%.Tensile test results indicate that a reinforcement volume fraction above 20% is beneficial for enhancing tensile strength and yield strength at high temperatures,but it has an adverse effect on room temperature elongation.Conversely,if the reinforcement volume fraction is below 20%,it can improve high-temperature elongation when the temperature exceeds 600℃. 展开更多
关键词 titanium matrix composites microstucture MICROHARDNESS tensile properties in-situ synthesis
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Synthesis, Characterization and Optical Morphology of ZnO Nanoparticles
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作者 Aida Smajlagić Almedina Modrić-Šahbazović +1 位作者 Zerina Sakić Elvir Babajić 《Open Journal of Applied Sciences》 2024年第5期1330-1337,共8页
The ZnO molecule plays an important role in the industry due to it special features, anti-corrosion anti-bacterial properties, as well as due to its low electrical conductivity and heat resistance. In these experiment... The ZnO molecule plays an important role in the industry due to it special features, anti-corrosion anti-bacterial properties, as well as due to its low electrical conductivity and heat resistance. In these experimental researches, the sol-gel method was chosen, which enables control of nucleation, aging and growth of particles in the solution. ZnO synthesis was prepared utilizing chemical method with Zinc acetate dyhidrate and NaOH with the appropriate methanol solvent and heating (60˚C). The methods used in identification and characterization are FTIR, UV/VIS, OPTICAL MICROSCOPY, SEM and XRD. The FTIR spectra of synthesized ZnO with corresponding ones show characteristic bands at the corresponding wavelengths, which confirm the presence of ZnO nanoparticles. SEM characterization of ZnO shows the morphology of needle-shaped nanoparticles. XRD spectar in this research by chemical method indicates the particle size of 17.76 nm. 展开更多
关键词 synthesis ZnO Nanoparticles Sol-Gel Method FTIR SEM XRD
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Synthesis and characterization of ε-VOPO_4 nanosheets for secondary lithium-ion battery cathode
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作者 陈泽华 马亿珠 +7 位作者 麻鹏程 曹建亮 王燕 孙广 王晓冬 哈日巴拉 张传祥 张战营 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2017年第2期377-381,共5页
Vanadium (III) phosphate monoclinic VPO4·H2O was synthesized hydrothermally. The ε-VOPO4 nanosheets, formed by the oxidative de-intercalation of protons from monoclinic VPO4·H2O, can reversibly react wit... Vanadium (III) phosphate monoclinic VPO4·H2O was synthesized hydrothermally. The ε-VOPO4 nanosheets, formed by the oxidative de-intercalation of protons from monoclinic VPO4·H2O, can reversibly react with more than 1 mol lithium atoms in two steps. Crystal XRD analysis revealed that the structure of the ε-VOPO4 nanosheets is monoclinic with lattice parameters of α=7.2588(4) A, b=6.8633(2) A and c=7.2667(4) A. The results show that the ε-VOPO4 nanosheets have a thickness of 200 nm and uniform crystallinity. Electrochemical characterization of the ε-VOPO4 monoclinic nanosheets reveals that they have good electrochemical properties at high current density, and deliver high initial capacity of 230.3 mA· h/g at a current density of 0.09 mA/cm2. Following the first charge cycle, reversible electrochemical lithium extraction/insertion at current density of 0.6 mA/cm2 affords a capacity retention rate of 73.6% (2.0?4.3 V window) that is stable for at least 1000 cycles. 展开更多
关键词 lithium-ion battery NANOSHEET vanadium phosphate cathode material synthesis characterization
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Synthesis and characterization of ZnTiO_3 with high photocatalytic activity 被引量:2
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作者 严欣 赵翠连 +3 位作者 周义龙 吴振军 袁剑民 李文生 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2015年第7期2272-2278,共7页
Perovskite ZnTiO3 was prepared through a new method which contained a hydrothermal process for the preparation of titanate nanotubes and an ion-exchange process.The titanate nanotubes were inferred to be H2Ti3O7·... Perovskite ZnTiO3 was prepared through a new method which contained a hydrothermal process for the preparation of titanate nanotubes and an ion-exchange process.The titanate nanotubes were inferred to be H2Ti3O7·3H2O.X-ray diffraction(XRD)result revealed the presence of cubic perovskite phase of ZnTiO3.The unique chain-like morphology of ZnTiO3 was observed by scanning electron microscopy(SEM) and transmission electron microscopy(TEM).UV-Vis diffusive reflection spectra of ZnTiO3indicated that the absorbance obviously increased in the visible light region.The degradation rate of methyl orange solution(15 mg/L)reached 95.3%over ZnTiO3(0.3 g/L) after 20 min xenon light irradiation,which was higher than that using the commercial catalyst P25 under the same reaction condition.The degradation kinetic results follow the first-order equation and the rate constant is 0.1020. 展开更多
关键词 ZnTiO3 ion-exchange PHOTOCATALYSIS PEROVSKITE synthesis characterization
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Synthesis and Characterization of Microcapsules with Chlorpyrifos Cores and Polyurea Walls 被引量:19
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作者 ZHANG Qiang ZHANG Pei-pei JIAO Qing-ze 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2006年第3期379-382,共4页
Microcapsules with chlorpyrifos cores and polyurea walls were synthesized with 2,4-tolylene diisocyanate as an oil-soluble monomer and ethylenediamine as a water-soluble monomer via an interracial polycondensation rea... Microcapsules with chlorpyrifos cores and polyurea walls were synthesized with 2,4-tolylene diisocyanate as an oil-soluble monomer and ethylenediamine as a water-soluble monomer via an interracial polycondensation reaction. The products were characterized by means of Fourier transform infrared spectrometry, ^13C NMR spectrometry and ^31p NMR spectrometry. The morphology, the particle size and the particle size distribution, and the thermal properties were also evaluated. The prepared microcapsules exhibit clear and smooth surfaces and have a mean diameter of 28. 13 μm. These microcapsules also have a good thermal stability for long-term use, and have potential applications in minimizing the toxicity of chlorpyrifos through controlled release. 展开更多
关键词 MICROCAPSULE CHLORPYRIFOS POLYUREA synthesis characterization
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Synthesis,characterization and catalytic properties of Y-β zeolite composites 被引量:9
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作者 Qin Bo Zhang Xiwen Zhang Zhizhi Ling Fengxiang Sun Wanfu 《Petroleum Science》 SCIE CAS CSCD 2011年第2期224-228,共5页
Y-β zeolite composites were hydrotherrnally synthesized by using high silica Y zeolite as the precursor and characterized by XRD, N2 adsorption, SEM and IR spectra of pyridine. The result showed that the N2 adsorptio... Y-β zeolite composites were hydrotherrnally synthesized by using high silica Y zeolite as the precursor and characterized by XRD, N2 adsorption, SEM and IR spectra of pyridine. The result showed that the N2 adsorption-desorption isotherm of the zeolite composites had a distinct hysteresis loop, and the SEM result showed that the zeolite composites had a different morphology from Y, β and the corresponding physical zeolite mixture. The acid catalytic performance of the zeolite composite catalysts was investigated in the hydrocracking and hydroisomerization of n-octane, and the results showed that the composite materials exhibited an excellent hydrocracking activity and good hydroisomerization performance. The yield of i-C4 over the zeolite composite catalyst was 4.45% higher than that on the corresponding zeolite mixture in the n-octane hydrocracking process at 553 K. The isomerization ability of n-octane over the composite catalyst was 3.6 fold that of the corresponding mixture at 503 K. 展开更多
关键词 Zeolite composites synthesis characterization HYDROCRACKING HYDROISOMERIZATION
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Synthesis and Characterization of Dual Acidic Ionic Liquids 被引量:5
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作者 Xiao Hua WANG Guo Hong TAO Zi Yan ZHANG Yuan KOU 《Chinese Chemical Letters》 SCIE CAS CSCD 2005年第12期1563-1565,共3页
Novel ionic liquids with dual acidity, of which the cation contains Brφnsted acidity and anions contain Lewis acidity were synthesized. These ionic liquids obtained were identified by NMR, FF-IR, SDT and FAB-MS. Thei... Novel ionic liquids with dual acidity, of which the cation contains Brφnsted acidity and anions contain Lewis acidity were synthesized. These ionic liquids obtained were identified by NMR, FF-IR, SDT and FAB-MS. Their acidities were determined by pyridine probe on IR spectrography. 展开更多
关键词 Ionic liquids FUNCTIONAL dual acidity synthesis characterization
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Hydrothermal synthesis, characterization and optical properties of La_2Sn_2O_7:Eu^(3+) micro-octahedra 被引量:6
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作者 杨锦瑜 苏玉长 刘雪颖 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2011年第3期535-543,共9页
Pyrochlore structure La2Sn2O7:Eu3+ microcrystals with uniform octahedron shape were successfully synthesized via a hydrothermal route at 180 °C for 36 h. The crystal structure, particle size, morphologies, and ... Pyrochlore structure La2Sn2O7:Eu3+ microcrystals with uniform octahedron shape were successfully synthesized via a hydrothermal route at 180 °C for 36 h. The crystal structure, particle size, morphologies, and optical properties of the as-synthesized products were investigated by XRD, TEM, SEM, EDS, FT-IR, Raman spectroscopy and PL. The effects of pH of precursor solution, precursor concentration, reaction temperature, and time were investigated. The results reveal that pH of the precursor solution not only plays an important role in determining the phase of the as-synthesized products, but also has a significant influence on the morphologies of the samples. High-quality and uniform octahedrons with an average size of about 700 nm could be easily obtained at the pH value of 12. The possible formation mechanism of octahedral-like La2Sn2O7:Eu3+ microcrystals was briefly proposed. The photoluminescence spectra show that La2Sn2O7:Eu3+ micro-octahedra display stronger emission in the range of 582-592 nm compared with the samples with other shapes. 展开更多
关键词 pyrochlore structure hydrothermal synthesis growth mechanism optical properties
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Synthesis and Characterization of Y-Doped Mesoporous CeO_2 Using A Chemical Precipitation Method 被引量:5
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作者 宋晓岚 江楠 +2 位作者 李宇焜 徐大余 邱冠周 《Journal of Rare Earths》 SCIE EI CAS CSCD 2007年第4期428-433,共6页
Using cetyltrimethylammonium bromide (CTAB) as the template agent, cerium nitrate as the cerium resource, yttrium nitrate as the yttrium resource, and ammonium carbonate as the precipitating agent, mesoporous CeO2 p... Using cetyltrimethylammonium bromide (CTAB) as the template agent, cerium nitrate as the cerium resource, yttrium nitrate as the yttrium resource, and ammonium carbonate as the precipitating agent, mesoporous CeO2 powders doped with different yttrium contents were successfully synthesized using a chemical precipitation method, under an alkalescent condition. Properties of the obtained samples were characterized and analyzed with X-ray diffraction (XRD), energy dispersive analysis of X-rays (EDAX), transmission electron microscopy (TEM), infrared (IR) absorbance, and the BET method. For the prepared samples with 20% (molar ratio) Y-doped content, a BET specific surface area of 106. 6 m^2 · g^- 1, with an average pore size of3~27 nm were obtained. XRD patterns showed that the doped samples were with a cubic fluorite structure. TEM micrographs revealed that the doped samples showed a spherical morphology with a diameter ranging from 20 to 30 nm and a round pore shape. IR results indicated that the Ce-O-Ce vibration intensity decreased as the Y-doped content increased. N2 adsorption-desorption isotherms showed that the samples possessed typical mesopore characteristics. The average pore size of the samples decreased alter mesoporous CeO2 was doped with yttrium, and the average pore size decreased largely as the Y-doped content increased. 展开更多
关键词 mesoporous ceria Y-doped chemical precipitation method synthesis characterization rare earths
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Synthesis and Characterization of CdSe Nanocrystals Capped by CdS 被引量:4
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作者 SUXing-guang LINZhang-bi +2 位作者 HUHai ZHANGJia-hua JINQin-han 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2003年第3期269-274,共6页
CdSe semiconductor nanocrystals capped by CdS were synthesized in the aqueous solution with 2 mercaptoethanol as the stabilizer. The CdS capping with a higher band gap than that of the core crystallite has successfu... CdSe semiconductor nanocrystals capped by CdS were synthesized in the aqueous solution with 2 mercaptoethanol as the stabilizer. The CdS capping with a higher band gap than that of the core crystallite has successfully eliminated the surface traps. Optical absorption and fluorescence emission spectra were used to probe the effect of CdS passivation on the electronic structure of the nanocrystals. The composite CdSe/CdS nanocrystals exhibit strong, narrow(FWHM≤40 nm) and stable band edge photoluminescence. X ray powder diffraction, transmission electron microscopy and X ray photoelectron spectroscopy were used to analyze the composite nanocrystals and determine their average size, size distribution, shape, internal structure and elemental composition. 展开更多
关键词 CdSe/CdS Nanocrystal synthesis characterization
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Preliminary Synthesis and Characterization of Mesoporous Nanocrystalline Zirconia 被引量:3
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作者 XinmeiLiu GaoqingLu ZifengYan 《Journal of Natural Gas Chemistry》 EI CAS CSCD 2003年第3期161-166,共6页
A novel method to prepare mesoporous nano-zirconia was developed. Thesynthesis was carried out in the presence of PEO surfactants via a solid-state reaction. Thematerials exhibit a strong diffraction peak at low 2θ a... A novel method to prepare mesoporous nano-zirconia was developed. Thesynthesis was carried out in the presence of PEO surfactants via a solid-state reaction. Thematerials exhibit a strong diffraction peak at low 2θ angle and their nitrogenadsorption/desorption isotherms are typical of type IV with H1 hysteresis loops. The pore structureimaged by TEM can be described as wormhole domains. The tetragonal zirconia nanocrystals are uniformin size (around 1.5 nm) and their mesopores focus on around 4.6 nm. The zirconia nanocrystal growthis tentatively postulated to be the result of an aggregation mechanism. This study also revealsthat the PEO surfactants can interact with the Zr-O-Zr framework to reinforce the thermal stabilityof zirconia. The ratio of NaOH to ZrOCl_2, crystallization and calcination temperature play animportant role in the synthesis of mesoporous nano-zirconia. 展开更多
关键词 solid-state reaction ZIRCONIA MESOPORE NANOSIZE synthesis characterization
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Synthesis, Characterization and Antioxidative Activity of Lanthanide Complexes with Genistein 被引量:3
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作者 樊娟 申蕊 唐宁 《Journal of Rare Earths》 SCIE EI CAS CSCD 2004年第S1期25-28,共4页
Six genistein lanthanide complexes, LnL_2 (OAc)·nH_2O [Ln=La(Ⅲ), Sm(Ⅲ), Eu(Ⅲ), Gd(Ⅲ), (Tb(Ⅲ),) Dy(Ⅲ); L=genistein; n=4, 7, 8] were synthesized and characterized on the basis of elemental analyses, IR, (()~1... Six genistein lanthanide complexes, LnL_2 (OAc)·nH_2O [Ln=La(Ⅲ), Sm(Ⅲ), Eu(Ⅲ), Gd(Ⅲ), (Tb(Ⅲ),) Dy(Ⅲ); L=genistein; n=4, 7, 8] were synthesized and characterized on the basis of elemental analyses, IR, (()~1H) NMR spectra and molar conductivity. The scavenging activity of genistein and five lanthanides complexes on the hydroxyl free radicals (OH·) was also investigated by spectrophotometric methods. The results show that the scavenging activity of the complexes is better than that of the ligand and their scavenging ability can be assembled in the following order: Sm>La>Dy>Eu>Tb>L. 展开更多
关键词 GENISTEIN lanthanide complexes antioxidative activity synthesis and characterization rare earths
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Synthesis, Characterization and Formation Mechanism of Friedel's Salt(FS:3CaO·A1_2O_3·CaCl_2·10H_2O) by the Reaction of Calcium Chloride with Sodium Aluminate 被引量:3
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作者 马家玉 LI Zhibao +1 位作者 JIANG Yuehua YANG Xiaoping 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2015年第1期76-83,共8页
The synthesis of Friedel's salt (FS: 3CaO·Al2O3·CaCl2·10H2O) by the reaction of calcium chloride with sodium aluminate was investigated. Factors affecting the preparation of Friedel's salt, such as... The synthesis of Friedel's salt (FS: 3CaO·Al2O3·CaCl2·10H2O) by the reaction of calcium chloride with sodium aluminate was investigated. Factors affecting the preparation of Friedel's salt, such as reaction temperature, initial concentration, titration speed, aging time and molar Ca/Al ratio were studied in detail. XRD, SEM images and particle size distribution show that the reaction temperature, aging time and molar Ca/Al ratio have significant effect on the composition, crystal morphology, and average particle size of the obtained samples. In addition, the initial CaCl2 concentration and NaAlO2 titration speed do not significantly influence the morphology and particle size distribution of Friedel's salt. With the optimization of the operating conditions, the crystals can grow up to a average size of about 28 μm, showing flat hexagonal (or pseudo- hexagonal) crystal morphology. Moreover, two potential mechanisms of Friedel's salt formation including adsorption mechanism and anion-exchange mechanism were discussed. In the adsorption mechanism, Friedel's salt forms due to the adsorption of the bulk C1- ions present in the solution into the interlayers of the principal layers, [Ca2Al(OH-)6·2H2O]+, in order to balance the charge. In the anion-exchange mechanism, the freechloride ions bind with the AFro (a family of hydrated compounds found in cement) hydrates to form Friedel's salt by anion-exchange with the ions present in the interlayers of the principal layer, [Ca2Al(OH-)6. 2H2O]+- OH-. 展开更多
关键词 synthesis characterization formation mechanism Friedel's salt
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Synthesis, Characterization and Thermal Decomposition Mechanism of Cetyltrimethyl Ammonium Tetrathiotungstate 被引量:3
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作者 Gaojun An Yunqi Liu Yongming Chai Hongyan Shang Chenguang Liu 《Journal of Natural Gas Chemistry》 EI CAS CSCD 2006年第2期127-133,共7页
The synthesis, characterization and thermal decomposition mechanism of cetyltrimethyl ammonium tetrathiotungstate (CTriMATT) were studied herein. The as-synthesized CTriMATT was characterized by Elemental analysis, ... The synthesis, characterization and thermal decomposition mechanism of cetyltrimethyl ammonium tetrathiotungstate (CTriMATT) were studied herein. The as-synthesized CTriMATT was characterized by Elemental analysis, X-ray diffraction (XRD), Fourier transform infrared (FT-IR), Ultraviolet visible (UV-Vis) spectra. The results showed that the as-synthesized CTriMATT had high purity and good crystallinity. The introduction of alkyl groups induced a shift of the stretching vibration band of W-S bond to lower wavenumber, while it had no influence on the position of WS4^2-. Thermogravimetric analysis (TG), differential thermal analysis (DTA) and in situ XRD characterizations revealed that CTriMATT began to decompose at 423 K in nitrogen and was converted to WS2 eventually. In addition, the decomposition product of CTriMATT at 673 K in nitrogen was characterized by N2 adsorption (BET) and scanning electron microscopy (SEM). The results demonstrated that WS2 with higher specific surface area, and pore volume could be obtained from the thermal decomposition of CTriMATT in nitrogen. 展开更多
关键词 cetyltrimethyl ammonium tetrathiotungstate synthesis characterization thermal decomposition mechanism alkyl-substituted
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Synthesis and structure characterization of diethyldiallylammonium chloride 被引量:5
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作者 刘立华 龚竹青 郑雅杰 《Journal of Central South University of Technology》 2003年第4期347-351,共5页
The unsaturated quaternary ammonium salt diethyldiallylammonium chloride(DEDAAC) was synthesized in a two-step synthetic method. The influences of the adding method of raw materials and temperature on the yields of di... The unsaturated quaternary ammonium salt diethyldiallylammonium chloride(DEDAAC) was synthesized in a two-step synthetic method. The influences of the adding method of raw materials and temperature on the yields of diethylallylamine (DEAA), and drying and temperature on the synthesis of DEDAAC were investigated. The content of in-process product DEAA was determined by non-aqueous titration. The structure of product DEDAAC was identified with IR, 1 H NMR and elemental analysis. The results show that adding allyl chloride and sodium hydroxide alternately can increase the yield of DEAA and decrease by-products. In further synthesizing of DEDAAC from DEAA, the step of drying DEAA is very necessary. When DEAA is dried by solid sodium hydroxide, good columnar crystals with a high purity(mp 199.5-201.0 ℃) are obtained; when DEAA is undried or the content of water in DEAA is above 20%, only platelets with bad quality are obtained even without crystals. The suitable synthesis conditions for DEAA and DEDAAC are 35 ℃, 6 h and 40 ℃, 36 h, respectively, and their yields are 69.7% and 67.3%, respectively. 展开更多
关键词 UNSATURATED quaternary ammoniun salt diethylallylamine diethyldiallylammonium chloride DIETHYLAMINE allylchloride synthesis characterization
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Synthesis and characterization of arginine-modified and europium-doped hydroxyapatite nanoparticle and its cell viability 被引量:1
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作者 赵颜忠 朱军 +3 位作者 朱晒红 黄艳艳 李志友 周科朝 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2011年第8期1773-1778,共6页
The arginine-modified and europium-doped hydroxyapatite nanoparticles(HAP-Eu) were synthesized by hydrothermal synthesis.The prepared nanoparticles were characterized by transmission electron microscopy(TEM),X-ray... The arginine-modified and europium-doped hydroxyapatite nanoparticles(HAP-Eu) were synthesized by hydrothermal synthesis.The prepared nanoparticles were characterized by transmission electron microscopy(TEM),X-ray diffractometry(XRD),Fourier transform infrared(FTIR) and zeta potential analyzer.The cell viability of HAP-Eu was tested by image flow cytometry.The results indicated that HAP-Eu is short column shapes and its size is approximately 100 nm,its zeta potential is about 30.10 mV at pH of 7.5,and shows no cytotoxicity in human epithelial cells and endothelial cells. 展开更多
关键词 HYDROXYAPATITE ARGININE EUROPIUM hydrothermal synthesis cell viability
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Synthesis and Characterization of Montmorillonite Inorgano-Intercalation Compound Assisted by Microwave Irradiation 被引量:2
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作者 曹明礼 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2010年第3期444-448,共5页
A montmorillonite inorgano-intercalation compound(MIIC) was synthesized by using a purified Na-exchanged bentonite(PNaB) as a matrix and Al-pillaring ion as an intercalating reagent under microwave irradiation.The... A montmorillonite inorgano-intercalation compound(MIIC) was synthesized by using a purified Na-exchanged bentonite(PNaB) as a matrix and Al-pillaring ion as an intercalating reagent under microwave irradiation.The synthesized products were characterized by X-ray diffraction(XRD),^27Al magic angle sample-spinning nuclear magnetic resonance(^27Al MAS NMR),specific surface area(BET) measurement,and adsorption density determination.The results show that,at 5% solid(PNaB) concentration and 7 minutes irradiation in a 130 W microwave oven,the basal spacing d(001) of the synthesized MIIC increases to 1.740 nm from the original 1.218 nm of PNaB.The MIIC has much higher adsorptive densities to F-and Cr^6+ from aqueous solution than the PNaB.The adsorption isotherm of F-on the MIIC follows the Freundlich equation,and the increased adsorption is mainly due to the porous structure of the MIIC which created larger adsorption surfaces.The adsorption isotherm of Cr^6+ on MIIC follows the Langmuir equation and the adsorption is mainly monolayer as a result of chemisorptions. 展开更多
关键词 MONTMORILLONITE inorgano-intercalation compound synthesis characterization MICROWAVE
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Synthesis and characterization of conjugated polymer containing azobenzene and oxadiazole units 被引量:2
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作者 Yue Zhang Shi Jun Yu Lu Wang Cong Li 《Chinese Chemical Letters》 SCIE CAS CSCD 2009年第2期235-237,共3页
A novel conjugated polymer containing azobenzene and oxadiazole units was synthesized through multi-step synthesis. The structures and properties of monomer and polymer were characterized and evaluated with IR, ^1H NM... A novel conjugated polymer containing azobenzene and oxadiazole units was synthesized through multi-step synthesis. The structures and properties of monomer and polymer were characterized and evaluated with IR, ^1H NMR, UV, TGA and GPC, respectively. Polymer with long side chain of alkoxy shows good solubility, thermal stability and photoisomerization property. 展开更多
关键词 OXADIAZOLE Conjugated polymer synthesis characterization
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Synthesis and Characterization of Quaternary Complexes Ln(CH_2ClCOO)_2 (NO_3) (phen) 被引量:3
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作者 咸春颖 赵曙辉 +1 位作者 朱龙观 谢学鹏 《Journal of Donghua University(English Edition)》 EI CAS 2001年第3期88-90,共3页
Many binary lanthanide complexes have been studied. However, few mixed anion complexes with bidentate heterocyclic amines were synthesized. We synthesized mixed anion complexes Ln ( CH2 ClCOO )2 (NO3 ) ( phen) which w... Many binary lanthanide complexes have been studied. However, few mixed anion complexes with bidentate heterocyclic amines were synthesized. We synthesized mixed anion complexes Ln ( CH2 ClCOO )2 (NO3 ) ( phen) which was determined by elemental analyses . The IR spectra analyses indicate that NO3- , CH2 ClCOO- and phen are coordinated with Ln . The molar conductances of the complexes at 10-3 mol · L-1 were founded to be between 32.4 and 35.8 S·cm2· mol-1 , suggesting the nonelectrolytes in N-Dimethylformamide. And we determined the fluorescent spectra Eu(CH2ClCOO)2(NO3) ( phen ) and ESR spectra of Gd ( CH2 ClCOO )2 ( NO3) ( phen) . 展开更多
关键词 LANTHANIDE Quaternary Complex synthesis characterization.
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Synthesis and Structural Characterization of 2,3-Bis(hydroxymethyl)-2,3-dinitro-1,4-butanediol 被引量:3
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作者 毕福强 王伯周 +4 位作者 樊学忠 许诚 葛忠学 刘庆 张国防 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2012年第3期415-419,共5页
2,3-Bis(hydroxymethyl)-2,3-dinitro-1,4-butanediol(C6H12N2O8) was synthesized by condensation,cyclization,oxidative dimerization and deketalization of nitromethane with a total yield of 42.4%.The structure of the t... 2,3-Bis(hydroxymethyl)-2,3-dinitro-1,4-butanediol(C6H12N2O8) was synthesized by condensation,cyclization,oxidative dimerization and deketalization of nitromethane with a total yield of 42.4%.The structure of the title compound was characterized by 1H NMR,13C NMR,FT-IR,elementary analysis,and X-ray single-crystal diffraction analysis,which reveals that the title compound crystallizes in triclinic,space group P with a = 0.6324(2),b = 0.6454(3),c = 0.7062(3) nm,α= 111.550(4),β= 95.505(4),γ= 113.395(4)°,V = 0.23595(16) nm3,Z = 1,Mr = 240.18,Dc = 1.690 g·cm-3,μ = 0.159 mm-1,F(000) = 126,R = 0.0304 and wR = 0.0907. 展开更多
关键词 2 3-bis(hydroxymethyl)-2 3-dinitro-1 4-butanediol synthesis characterization crystal structure
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