1，2-双(1′-苯基-3′-甲基-5′-氧代吡唑-4′-基)乙二酮-[1，2]与三正辛基氧化膦协同萃取RE(Ⅲ)的性能和机理研究

研究了1，2-双(1′-苯基-3′-甲基-5′-氧代吡唑-4′-基)乙二酮-[1，2](H     

电感耦合等离子体原子发射光谱法测定钛合金中铈饵钆镧钕钇

采用硫酸(1+2)溶解样品,选择Ce 418.659nm、Er 326.478nm、Gd 342.246nm、La 408.671nm、Nd 406.108nm和Y 371.029nm为分析线,使用电感耦合等离子体原子发射光谱法(ICP-AES)测定Ce、Er、Gd、La、Nd、Y,从而建立了钛合金中Ce、Er、Gd、La、Nd、Y的测定方法。对共存元素的干扰情况进行了研究,得到各干扰元素的干扰系数,采用干扰系数校正法解决谱线干扰问题。各元素质量分数在0.005%~2.00%范围内校准曲线线性关系良好,相关系数均大于0.999 9,方法检出限为3~14μg/g。采用实验方法对钛合金标准样品、钛合金样品中Ce、Er、Gd、La、Nd、Y进行测定,结果的相对标准偏差(RSD,n=6)为0.63%~8.1%,结果与认定值或电感耦合等离子体质谱法(ICP-MS)测定值基本一致。     

Preparation of La0.9RE0.1MnO3 Ultra-fine Particles Used for CH4 Oxidation

Ｐｅｒｏｖｓｋｉｔｅ ｔｙｐｅｏｘｉｄｅｓ (ｇｅｎｅｒａｌｆｏｒｍｕｌａＡＢＯ3 )ｈａｖｅｂｅｅｎａｔｔｒａｃｔｉｎｇｍｕｃｈａｔｔｅｎｔｉｏｎｆｏｒｍｏｒｅｔｈａｎｔｗｏｄｅｃａｄｅｓｄｕｅｔｏｔｈｅｉｒｐｏｔｅｎｔｉａｌｃｏｍｍｅｒｃｉａｌａｐｐｌｉｃａｔｉｏｎｓａｓｃａｔａｌｙｓｔｓｆｏｒｖａｒｉｏｕｓｒｅａｃｔｉｏｎｓ :ｏｘｉｄａｔｉｏｎｏｆＣＯ[1～ 3 ] ａｎｄｌｉｇｈｔｈｙ ｄｒｏｃａｒｂｏｎｓ[4～ 7] ,ｃｏｍｂｕｓｔｉｏｎｏｆｎａｔｕｒａｌｇａｓｏｒＣＨ4 [8～ 1 1 ] (ｔｏｃｏｎｔｒｏｌＮ…     

Fabrication and Luminescence Properties of Ca2Gd8(SiO4)6O2:Er3+ Phosphors via Sol-Gel Process

Ca2RE8(SiO4)6O2 (RE=Y, Gd, La) is a kind of ternary rare-earth-metal silicate with the oxyapatite structure, which was used as host materials for the luminescence of various rare earth and mercury-like ions. Ca2Gd8(SiO4)6O2:Er3 phosphors were prepared through the sol-gel process. X-ray diffraction (XRD), scanning electron microscopy (SEM) and photoluminescence spectra were used to characterize the resulting phosphors. The results of XRD indicate that the phosphors crystallized completely at 1000 ℃. SEM study reveals that the average grain size is 400～1000 nm. In Ca2Gd8(SiO4)6O2:Er3 phosphors, the Er3 shows its characteristic green emission at 528 nm (2H11/2-4I15/2) and 548 nm(4S3/2-4I15/2) upon excitation into 382 nm, with an optimum doping concentration of 5% (mole fraction) of Gd3 in the host lattices.     

锂离子电池正极材料Li0．99Re0．01FePO4的合成及性能

采用固相反应法合成了锂离子电池正极材料Li0．99Re0．01FePO4（Re=Er、Y、Gd、Nd、La）。采用X射线衍射、恒电流充放试验对试样的微观结构和电化学性能进行测试。试验结果表明：掺杂稀土金属离子对LiFePO4的晶体结构没有影响。试样Li0．99Gd0．01FePO4的电化学性能最佧,在C／10和1C倍率下放电容量均最大,分别为136．63mAh／g、121．74mAh／g。     

Relationship between Crystal Structure and Luminescence Properties of （Y0.96-x Lnx Ce0.04 ）3 Al5 O12 （LH=Gd,La, Lu） Phosphors

The doping effects of La^3＋, Gd^3＋ and Lu^3＋ on the crystal structure and luminescence properties of （Yo96-x LnxCe0.04）3Al5O12（Ln = Gd, La, Lu） phosphors were studied. The X-ray diffraction patterns presented that with the inerease of the doping concentrations of La^3＋ and Gd^3＋ ions, the d-value of （Y0.96-xLnxCe0.04）3Al5O12 （Ln = Gd, La） inereased and the larger the doping ion, the stronger the effect would be. The doping amount causing phase transition in （Y0.96-xLnxCe0.04）3Al5O12 decreased with the inerease of the ionic radii of the doping lanthanide ions （La^3＋： 0.106 nm, Gd^3＋： 0. 094 nm, Lu^3＋ ： 0.083 nm）. The bigger doping ion of Gd^3＋ made the emission of （Y0.96-xGdxCe0.04）3Al5O12 move to red spectral region, but the smaller one of Lu^3＋ made it blue.     

Influence of Rare Earth Elements on Luminescent Properties of Y2SiO5:Tb

Photoluminescent(PL) and cathodoluminescent(CL) properties of rare earths (Sc3 , La3 , Gd3 and Lu3 ) doped (Y0.97Tb0.03)2SiO5 were studied. Rare earth doping clearly influences PL and CL properties of Y2SiO5:Tb. For La3 doped system, PL intensity increases nearly 10% at x=0.05 whereas for Lu3 doped system, the intensity increases about 20% at x=0.20. Gd3 doping and Sc3 doping reduce the intensity; at x=0.3, it is reduced about 30% for Gd3 doped system and about 15% for Sc3 doped system, respectively. Quenching concentration of activator became higher in rare earth doped samples, which may be understood by that the rare earth dopants might dilute the concentration of the activator. Additionally, doping also influences the color saturation of Y2SiO5:Tb. Sc3 , La3 , and Gd3 doping improve the color saturation, whereas Lu3 doping decreases the color saturation. CL measurements show that CL intensity increases for all rare earths doped systems. The energy transfer from Gd3 to Tb3 was discussed.     

ICP-AES法测定镝铁合金中稀土杂质

研究了以ICP-AES法测定镝铁合金中稀土杂质,采用基体匹配和光谱拟合技术消除基体光谱干扰,分析范围,La、Ce、Pr、Nd、Sm、Eu、Tm、Yb、Lu:0.0050％～0.50％,Gd、Tb、Ho、Er、Y:0.010％～0.50％,精密度RSD为0.40％～10.32％.对不同含量样品,经与等离子质谱法对照,结果吻合.     

Synthesis, Characterization and Vulcanizing Properties of Rare Earth Complexes with 2-Mercaptobenthiazole

2 ｍｅｒｃａｐｔｏｂｅｎｚｏｔｈｉａｚｏｌｅｗａｓｆｉｒｓｔｒｅｐｏｒｔｅｄｂｙＨｏｆｍａｎｎ[1 ] ｉｎ 1 887.Ｉｔｈａｓｂｅｅｎｕｓｅｄａｓａｎａｃｃｅｌｅｒａｔｏｒｉｎｔｈｅｖｕｌｃａｎｉｚａｔｉｏｎｏｆｒｕｂｂｅｒｆｏｒｍａｎｙｙｅａｒｓ .Ｔｏｄａｙｉｔｉｓｓｔｉｌｌｂｅｉｎｇｕｓｅｄａｓａｍａｉｎａｃｉｄｉｃａｃｃｅｌｅｒａｔｏｒｉｎｒｕｂｂｅｒｉｎｄｕｓｔｒｙ .Ｂｕｔｉｔｈａｓｄｉｓａｄｖａｎｔａｇｅｓｏｆｖｕｌｃａｎｉｚａｔｉｏｎｒｅｖｅｒｓｉｏｎａｎｄｅａｓｙｓｃｏｒｃｈ[2 ] ｗｈｅ…     

电感耦合等离子体原子发射光谱法测定镝铁电解粉尘中15种稀土元素

用硝酸和氢氟酸溶解试样,高氯酸冒烟除氟,在硝酸介质中用电感耦合等离子体原子发射光谱法(ICP-AES)测定了镝铁电解粉尘中La、Ce、Pr、Nd、Sm、Eu、Gd、Tb、Dy、Ho、Er、Tm、Yb、Lu、Y 15种稀土元素。为了提高高含量元素的测定准确度,在测定基体元素Dy时,采用铟作内标;为了消除基体效应对稀土杂质元素测定的影响,采用基体匹配的校准曲线。镝铁电解粉尘中铁含量很低(铁的质量分数不超过1%),对测定没有影响。实验方法测定了一镝铁电解粉尘样品,结果表明,La、Ce、Pr、Nd、Sm、Eu、Gd、Tb、Ho、Er、Tm、Yb、Lu和Y 14个稀土杂质元素测定值与ICP-MS的测定值基本一致,镝和14个稀土元素的合量与重量法测得的稀土总量吻合。     

Study on BSTO/MgO Ferroelectric Materials for Phase Shift Doped with Rare Earth Oxides

Phasedarrayantennascansteerthetransmitted orreceivedsignalswiththeadvantagesoffastscan ning,multipletargetstrackingandgoodanti jam ming.Theseantennasarecurrentlyconstructedusing ferritephaseshiftingelements,whicharecostly,large andheavy.Therefore,theirmil…     

Influence of La, Y, Gd, Cu, NH4^＋ Ions and DMSO on Luminescent Property of Terbium Complexes with Sulfosalicylate

Ｔｈｅｌａｎｔｈａｎｉｄｅｃｏｍｐｌｅｘｅｓｏｆｏｒｇａｎｉｃｌｉｇ ａｎｄｓａｓｆｌｕｏｒｅｓｃｅｎｔｍａｔｅｒｉａｌｓｈａｖｅｒｅｃｅｉｖｅｄｅｘ ｔｅｎｓｉｖｅａｔｔｅｎｔｉｏｎ .Ｔｈｅｕｓｅｏｆｆｌｕｏｒｅｓｃｅｎｔｏｒｇａｎｏ ｌａｎｔｈａｎｉｄｅｃｏｍｐｌｅｘｅｓｒｅｑｕｉｒｅｈｉｇｈｆｌｕｏ ｒｅｓｃｅｎｃｅｉｎｔｅｎｓｉｔｙａｎｄｌｏｗｃｏｓｔｃｏｍｐｌｅｘｅｓ .Ｉｎｒｅｃｅｎｔｙｅａｒｓ ,ｔｈｅｆｌｕｏｒｅｓｃｅｎｃｅｅｎｈａｎｃｅｍｅｎｔｏｆＴｂ(Ⅲ )ｏｒＥｕ(Ⅲ )ｃｏｍｐｌｅｘｅ…     

Preparing of Nano-Sized Power RE2O3(RE = La,Y,Gd) by Pyrolying Precursors

The precursors RE (HSal) 3 ( RE = La, Y, Gd; HSal = C6 H4 (OH) COO) were synthesized by the rheological phase reaction method. The mechanism and products of thermal decomposition of precursors was studied by using TG,DTA, gas chromatography-mass spectrometry (GC-MS). Nano-sized RE2O3 ( RE = La, Y and Gd) power were obtained by thermal decomposition of the precursors in air at 800 ℃. TEM measurement indicates that RE2O3 are spherical particles. The middle level diameter ( d50 ) of the particles are 19.3 ( La2O3 ) , 53.8 ( Y2O3 ) and 28.6 nm( Gd2O3 ) respectively by means of laser particles size analyzer.     

Synthesis and Characterization of Rare Earth Complexes of Ferrocenylcarbonylhydrazine

Ｔｈｅｍｅｔａｌｃｏｍｐｌｅｘｅｓｏｆｈｙｄｒａｚｉｄｅｓｈａｖｅａｔｔｒａｃｔｅｄｃｏｎｓｉｄｅｒａｂｌｅｉｎｔｅｒｅｓｔｏｗｉｎｇｔｏｔｈｅｉｒａｎｔｉｆｕｎｇａｌａｎｄａｎｔｉｂａｃｔｅｒｉａｌａｃｔｉｖｉｔｉｅｓ[1 ,2 ] .Ｔｈｅｙｃａｎａｌｓｏｂｅｕｓｅｄａｓａｎａｌｙｔｉｃａｌｒｅａｇｅｎｔｓ[3 ]ａｎｄｅｘｔｒａｃｔｉｎｇａｇｅｎｔｓｆｏｒｍｅｔａｌｓａｌｔｓ[4 ] .Ｍａｎｙｃｏｍｐｌｅｘｅｓｏｆｈｙｄｒａｚｉｄｅｓｈａｖｅｂｅｅｎｓｙｎｔｈｅｓｉｚｅｄａｎｄｃｈａｒａｃｔｅｒｉｚｅｄ[5]…     

Raman spectra of RE2O3 （RE=Eu,Gd, Dy,Ho, Er,Tm, Yb,Lu, Sc and Y）：laser-excited luminescence and trace impurity analysis

Raman spectra of a series of cubic rare earth sesquioxides RE2O3 （RE=Eu, Gd, Dy, Ho, Er, Tm, Yb, Lu, Sc and Y） were investigated by Raman spectroscopy with both 532 and 785 nm laser lines. Abundant additional bands due to laser-excited lumines-cence were observed. For Eu2O3, Dy2O3, Ho2O3, Er2O3, Tm2O3 and Yb2O3, the luminescence mainly came from the intrinsic trivalent lanthanide ions, while for Gd2O3, Lu2O3, Sc2O3 and Y2O3, their luminescence were attributed to the trace impurities of other lumines-cent lanthanide ions such as Eu3＋, Nd3＋and Er3＋. This investigation confirmed Raman spectroscopy as a useful tool for detecting trace luminescent lanthanide impurities.     

Analysis of Response Surface in the Study of RE(NO_3)_3-HNO_3-P507-Kerosene Extraction System

RE(NO_3)_3-HNO_3-P507-kerosene extraction system(RE=La,Ce,Pr,Nd,Sm,Eu,Gd,Tb,Dy,Ho,Er,Tm,Yb,Lu,Y)was studied by the response surface technique.14 models for extracting single rare earth ele-ment in a broad range of acidity and initial rare earth concentration were obtained by using the stepwiseregression method.Three-dimensional display of the response surface of the model of extracting Er~(3 )wasshowed as an example,which reveals clearly the dependence of distribution ratio upon both initial acidity and ini-tial rare earth concentration.     

Mechanism and specificity of lanthanide series cation transport by ionophores A23187, 4-BrA23187, and ionomycin

A23187, 4-BrA23187, and ionomycin transport several lanthanide series trivalent cations at efficiencies similar to Ca2+, when compared at cation concentrations of approximately 10(-5) M, ionophore concentrations of approximately 10(-6) M, and a pH of 7.00. Selectivity sequences and the range of relative rates are as follows: A23187, Nd3+ > La3+ > Eu3+ > Gd3+ > Er3+ > Yb3+ > Lu3+ (approximately 34-fold); 4-BrA23187, Nd3+ > Eu3+ > Gd3+ > La3+ > Er3+ > Yb3+ > Lu3+ (approximately 34-fold); ionomycin, La3+ > Yb3+ > Nd3+ > Lu3+ > Er3+ > Eu3+ > Gd3+ (approximately 4-fold). At concentrations between 9 and 250 microM, La3+ is transported by an electroneutral mechanism, predominately through mixed complexes of the type (ionophore)2La-OH (A23187 and 4-BrA23187) or (ionophore)La-OH (ionomycin), when no membrane potential is present. For all three ionophores, an induced potential of approximately 160 mV accelerates transport by approximately 50-100%. However, measured values of H+/La3+ exchange indicate that only 4-BrA23187 displays a significant electrogenic activity under these conditions. At a La3+ concentration of 17 mM, transport by all three ionophores is electroneutral and apparently occurs through complexes of type (ionophore)3La (A23187 and 4-BrA23187) or (ionophore)La-OH (ionomycin). Analysis of these patterns in a context of comproportionation equilibria involving the transporting species and free La3+ indicates that the species containing three ionophore molecules are formed on the membrane when aqueous phase solution conditions would strongly favor a 1:1 complex, based upon previous studies in solution. The implications of this and other findings are discussed.     

Hydrothermal Synthesis of RbLn2F7 and VUV Spectroscopy of RbLn2 F7 ：Eu^3＋（Ln=Gd, Y）

RbLn2F7（Ln = Gd, Y, Er, Yb and Lu）, crystallized in the hexagonal RbEr2F7 structure type, is synthesized by a hydrothermal method. The excitation spectra of Eu^3 ＋ -doped RbGd （Y）2F7 suggest that the oxygen content is very low in the samples obtained by hydrothermal synthesis. Only the f-f transitions of Gd^3＋ ions are observed in the excitation spectrum of RbGd2F7：Eu^3＋ （0.5mol%）, while those of Eu^3＋ ions do not appear. When the Gd^3＋ ions are excited, the absorbed energy is transferred efficiently from Gd^3＋ to Eu^3＋ . The spectra show that the doped Eu^3＋ ions are located in non-centrosymmetric sites in hexagonal RbLn2F7.     

Preparation of Reactive Bright Blue Rare Earth Dyestuffs and Their Spectra Properties

Reactive bright blue rare earth dyestuffs were prepared by using reactive bright blue and lanthanum oxide,praseodymium oxide, neodymium oxide, samarium oxide, europium oxide, gadolinium oxide, dysprosium oxide, erbium oxide, lutetium oxide, yttrium oxide respectively for dyeing silk cloth.The degree of dyeing of reactive bright blue praseodymium and the degree of fixation of reactive bright blue gadolinium are the biggest, and 22.9% and 7 %are increased with that of reactive bright blue respectively.The spectra of reactive bright blue rare earth and reactive bright blue were studied by UV-VIS.In 200.00 ～ 800.00 nm, reactive bright blue has four absorption peaks, reactive bright blue rare earth has three absorption peaks; in 420.00 ～ 760.00 nm, reactive bright blue has two absorption peaks at 661.50 nm and 625.50 nm, respectively, and λmax is 661.50 nm; reactive bright blue rare earth has one absorption peak at 620.50, 618.00, 622.00, 623.00, 622.50, 619.50, 619.00, 621.00, 624.00, 620.00 nm adding La3 ,Pr3 , Nd3 , Sm3 , Eu3 , Gd3 , Dy3 , Er3 , Lu3 , Y3 respectively.     

Effect of Ln3＋ on Inhibition of Tobacco RuBPcase

Ｉｔｗａｓｐｒｏｖｅｄｂｙｐｒｅｖｉｏｕｓｗｏｒｋｓ[1] ｔｈａｔｒａｒｅｅａｒｔｈｅｌｅｍｅｎｔｓｐｒｏｍｏｔｅｔｈｅｇｒｏｗｔｈａｎｄｄｅ ｖｅｌｏｐｍｅｎｔｏｆｐｌａｎｔｓａｎｄｉｎｃｒｅａｓｅｔｈｅｙｉｅｌｄｏｆｃｒｏｐｓａｔｌｏｗｃｏｎｃｅｎｔｒａｔｉｏｎ ,ｂｕｔｗｈｅｎｔｈｅｃｏｎ ｃｅｎｔｒａｔｉｏｎｉｓｈｉｇｈ ,ｔｈｅｙｗｉｌｌｉｎｈｉｂｉｔｔｈｅｇｒｏｗｔｈｏｆｐｌａｎｔｓ .Ｉｔｗａｓａｌｓｏｐｒｏｖｅｄ[2 ,3] ｔｈａｔｒａｒｅｅａｒｔｈｅｌｅｍｅｎｔｓｅｘｈｉｂｉｔｂｏｔｈｐｏｓ…