氢氧化锶纳米粉体的制备与表征

采用沉淀法制备氢氧化锶纳米粉体,对制备粉体的条件进行了系统的研究.XRD表明,一水氢氧化锶为斜方相;八水氢氧化锶为四方相.TEM分析表明,八水氢氧化锶水溶胶及粉体呈现纤维状,一水氢氧化锶粉体为斜方形,平均粒径为80 nm.     

4-(2-苯并(噁)唑基)苯甲酸的氧化合成

采用气-液两相常压催化氧化法,以Co(AcO)2/Mn(AcO)2/NaBr为复合催化剂,合成了一种新型荧光增白剂中间体4-(2-苯并唑基)苯甲酸。考察了反应条件对收率的影响。实验结果表明,在催化剂质量分数1%、n(Co)∶n(Mn)=1∶3、溶剂质量分数80%、反应时间4 h、反应温度110℃、氧气速率15 mL.min-1条件下,单程收率达93%。脱水处理后反应液可循环使用5次,平均收率大于90%。     

金属间化合物Sm_3(Fe_(1-x)V_x)_(29)的结构及其微观机制研究

利用X射线衍射,金相显微镜,能谱分析以及差示扫描量热(DSC)等手段对金属间化合物Sm3(Fe1-xVx)29(x=0.01,0.03,0.05,0.08,0.1)的结构及其微观机制进行了研究.结果表明,金属间化合物Sm3(Fe1-xVx)29(x=0.01,0.03,0.05,0.08,0.1)的结构均为3:29型结构,并且随V含量增加,金属间化合物Sm3(Fe1-xVx)29的晶格常数和晶胞体积V均呈减少趋势.当x>0.05时,金属间化合物Sm3(Fe1-xVx)29中的杂质相明显呈现出来.随着V含量的增加,居里温度(TC)呈单调上升趋势.     

NaOH and Ba(OH)_2 Compound Catalyzed PhenolResorcinol-Formaldehyde Copolycondensation Resin Adhesive for Recombined Bamboo

In order to reduce the curing temperature, shorten the curing time of phenol-formaldehyde(PF) resin adhesive, and ensure the good water-solubility, NaOH and Ba(OH)_2 were used as compound catalysts. The influences of the adding time of Ba(OH)_2, the adding amount of NaOH, Ba(OH)_2 and resorcinol on the properties of adhesives were studied. The properties of NaOH catalyzed phenol-formaldehyde(PF) adhesive, NaOH and Ba(OH)_2 compound catalyzed PF adhesive, NaOH and Ba(OH)_2 compound catalyzed phenol-resorcinol-formaldehyde(PRF) adhesive, and the prepared recombinant bamboo with three kinds of adhesives were compared. The experimental results show that NaOH and Ba(OH)_2 compound catalyst not only shortens the curing time of PF adhesive, but also guarantees the suitable water solubility of adhesive. After copolycondensation with resorcinol, the curing time of adhesive is further shortened, the water solubility is improved obviously, and the highest bonding strength is obtained. Infrared spectrum analysis shows that the reaction activity point of NaOH and Ba(OH)_2 compound catalyzed PRF adhesive will increase, so that both the curing temperature and curing enthalpy decrease.     

新型镍系催化剂合成顺式聚丁二烯的研究 (Ⅱ)—Ni(naph)_2-Al(i-Bu)_2OC_4H_9-BF_3·OEt_2体系的活性

本工作研究了Ni(naph)_2—Al(i—Bu)_2OG_4H_9—BF_3·OEt_2体系在加氢汽油溶剂中对丁二烯的聚合行为,考察了不同Al/Ni、Al/B、Ni/Bd及聚合温度、聚合时间等因素对催化活性、聚合物分子量及其分布等的影响,并结合磁化半法对体系中Ni的价态进行了探讨。结果表明,Ni(naph)_2—Al(i—Bu)_2OC_4H_9—BF_3·OFt_2体系对丁二烯聚合具有较好的催化活性,体系中镍主要以Ni(Ⅰ)形式存在。并发现,在Ni(naph)_2、Al(i—Bu)_3二元陈化液中加入C_4H_9OH(C_4H_9OH/Al的变化范围为0—1.2)可以提高聚合物的分子量。     

含镍废水的氢氧化镁净化研究

以氢氧化镁作为吸附剂处理含镍酸性废水的结果表明,该方法操作简便,镍去除率高,处理后废水中镍含量可以达到国家排放标准要求。氢氧化镁对Ni~(2+)的饱和吸附量达1.2267g/g 。氢氧化镁回收后,经轻烧处理变成氧化镁,仍可以处理含镍工业废水,且可多次使用。吸附等温线的测定和吸附产物的粉末X衍射分析结果表明,Mg(OH)_2对Ni~(2+)的吸附为典型的化学吸附。     

含铬废水的氢氧化镁净化研究

探讨了氢氧化镁水处理剂处理含铬酸性废水的机理和影响因素,并对吸附产物的组成进行了粉末X衍射分析．结果表明：用氢氧化镁处理酸性含铬工业废水,操作简便,去除率高,能够达到国家排放标准．氢氧化镁对铬的吸附为化学吸附,其饱和吸附量为0．5402g／g．氢氧化镁回收后,经轻烧处理变成氧化镁,仍可以用于处理含铬工业废水,且可以多次使用．     

大环异核配合物[CuML（H2O）2]（ClO4）2的合成与表征

在金属离子存在下，用2，6-二甲酰基-对-正丁基苯酚与乙二胺和二乙烯三胺进行分步环缩合反应，合成了五种新型不对称的同核和异核大环配合物[CuML（H2O）n]（ClO4）2（M=Cu，Mn，Zn，CA和Ni；n=1，2），并用电喷雾质谱对它们在溶液中的存在形式进行了详细的研究．实验结果表明：[CuMnL（H2O）2]（ClO4）2，[CuZnL（H2O）2]（ClO4）2和[CuCdL（H2O）2]（ClO4）2比[CuNiL（H2O）]（ClO4）2和[CuCuL（H2O）]（ClO4）2更稳定．     

Study on the Variation of Calcium and Phosphorus in Nano Hydroxyapatie Treated Cancer Cells through Synchrotron Radiation XRF

1Introduction Synchrotronradiation(SR)isanexcellentsource withhighbrightnessforX rayfluorescence(XRF).Syn chrotronradiationX rayisappliedaslightresourceofSR XRF.TheSR XRFisgeneratedbyhighenergyelectron accelerator.Itoffershighsensitivityandspatialresoluti…     

Fe 2(SO4)3/SiO2 催化合成环己酮1,2-丙二醇缩酮

采用溶胶-胶凝法和浸渍法制备了二氧化硅负载的硫酸铁[Fe₂(SO₄)₃/SiO₂]固体酸催化剂,以环己 酮和1,2-丙二醇为原料,在无溶剂条件下合成了环己酮1,2-丙二醇缩酮。考察了Fe₂(SO₄)₃/SiO₂ 固体酸催化剂 的焙烧温度、Fe₂(SO₄)₃ 在SiO₂ 上的负载量、醇酮物质的量比、催化剂质量和反应时间等因素对产品收率的影响。 实验结果表明,Fe₂(SO₄)₃/SiO₂ 固体酸是合成环己酮1,2-丙二醇缩酮的理想催化剂,较适宜的反应条件为:催化 剂的焙烧温度300℃、Fe₂(SO₄)₃ 在SiO₂ 上的负载量20%、环己酮与1,2-丙二醇的物质的量比1∶1、催化剂质量 分数5%和反应时间70min。在此条件下,环己酮1,2-丙二醇缩酮收率达到98.21%。Fe₂(SO₄)₃/SiO₂催化剂具 有良好的稳定性,重复使用5次后环己酮1,2-丙二醇缩酮的收率为88.90%。     

Photogenerated carrier transfer mechanism and photocatalysis properties of TiO2 sensitized by Zn（ Ⅱ ） phthalocyanine

The Zn(Ⅱ) phthalocyanine sensitized TiO2(ZnPc-TiO2) nanoparticles were prepared by hydrothermal method via impregnation with ZnPc.The as-prepared photocatalysts were characterized by X-ray diffractometry(XRD) and diffuse reflectance spectroscopy(DRS),and the surface photovoltage spectroscopy(SPS) and photocatalytic degradation of rhodamine B(RhB) were studied under illuminating.The experimental results indicate that TiO2 sensitized by ZnPc extends its absorption band into the visible region effectively,and ...     

双滴加法制备纳米氢氧化镁

以氯化镁为原料,氢氧化钠为沉淀剂,采用沉淀法制备了纳米氢氧化镁,研究了原料滴加方式、滴加时间、底料类型等对反应的影响。结果表明,采用双滴加法,使用去离子水或少量氨水为底料,物料滴加时间为15 min时,制得的纳米氢氧化镁分散性好,且易过滤,氢氧化镁收率和纯度可分别达94.48%和93.33%。     

葡聚糖-聚乳酸接枝共聚物的合成及其药物载体输送系统

合成葡聚糖-聚乳酸接枝共聚物,并以此为载体,选择盐酸阿霉素为模型药物,利用纳米沉淀法和双乳法构建出了载药纳米粒子,并通过透射电镜(scanning electron microscope,TEM)、动态光散射(dynamic light scattering,DLS)、紫外(UV-vis)对其形貌、粒径及包封率进行了表征,结果表明:不同共聚物/药物比例会影响载药纳米粒子的粒径、粒径分布及包封率.此外,载药纳米粒子的体外释放实验表明:在弱碱条件(pH=7.4)下的释放速度比在弱酸条件(pH=5.0)下的慢,说明释放介质的pH对其释放性能有较大影响,有利于药物在肿瘤细胞中的控释.     

Fluorescence properties and application of doping complexes Eu_(l-x)L_x(TTA)_3Phen as light conversion agents

1　INTRODUCTIONRecently ,theinvestigationonlightconversiona gentsmainlycoversorganicluminescentpigments ,in organicluminescentmaterialsandrareearthcomplex esluminescentmaterials[1 4 ] .Organicfluorescentpig mentsforlightconversionagentshavegoodlumines centintensity ,howevertheirstabilityispoor .Inor ganicluminescentmaterialshavegoodstability ,buttheirfluorescentintensityislowandhaspoorcompat ibilitywithresin .Rareearthcomplexesluminescentmaterialshavehighfluorescentintensityandgoodsta bil…     

复合掺杂Nd(Ⅲ)和Zn(Ⅱ)非晶态Ni(OH)_2电极活性材料的制备及其表征

以NiSO_4、ZnSO_4和Nd(NO_3)_3为原料, 采用共沉淀快速冷冻法制备出了复合掺杂稀土Nd(Ⅲ)和Zn(Ⅱ)的非晶态氢氧化镍粉体材料.测试发现:样品材料微结构无序性强,结晶水含量较高.将样品材料制备成镍电极并组装成MH-Ni电池,在80 mA/g恒电流充电5.5 h、40 mA/g恒电流放电、终止电压为1.0 V的充放电制度下,复合掺杂6%Nd(Ⅲ)和6%Zn(Ⅱ)样品材料电池的放电平台为1.262 4 V,放电比容量为343.12 mAh/g,远高于目前应用的β-Ni(OH)_2电极活性材料的放电比容量.     

Pr_2(Co_(1-x)Mn_x)_(14)B和Pr_2(Fe_(1-x)Mn_x)_(14)B的结构和低温磁性

本文研究了Pr_2(Co_(1-x)Mn_x)_(14)B 和 Pr_2(Fe_(1-x)Mn_x)14B 化合物的晶体结构和低温内禀磁性.在 x≤0.5时,可以形成2-14-1四方晶体结构.当 x 分别大于0.3和0.2时,Pr_2(Co_(1-x)Mn_x)_(14)B 和 Pr_2(Fe_(1-x)Mn_x)_(14)B 的居里温度 T_c 和饱和磁化强度σ_s 急剧减小.这两种化合物块状样品在1.5 K 的内禀矫顽力分别达到16 kOe 和22 kOe.内禀矫顽力既随成分变化,也随温度改变.低温特大矫顽力来源于窄畴壁能的涨落.     

HAP纳米粒子与传统抗癌药物的抗癌效果比较

采用MTT法检测HAP纳米粒子及5种传统化疗药物对体外培养肝癌Bel-7402细胞及正常对照细胞的敏感性，研究对比HAP纳米粒子及传统抗癌药物对体外肝癌细胞的作用特点。在相同的作用时间内，不同浓度的常用抗癌药物大部分表现出良好的抑癌效果，而HAP纳米粒子较大部分化疗药物对肝癌细胞抑制作用低，但对于正常对照细胞无影响，结果HAP纳米粒子能够作为一种抗癌药物，与传统抗癌药物相比，它存在着优越性。     

金属间化合物Sm3(Fe1-xVx)29的结构及基微观机制研究

利用X射线衍射,金相显微镜,能谱分析以及差示扫描量热（DSC）等手段对金属间化合物Sm3（Fe1-xVx）29（x=0．01,0．03,0．05,0．08,0．1）的结构及其微观机制进行了研究．结果表明,金属间化合物Sm3（Fe1-xVx）29（x=0．01,0．03,0．05,0．08,0．1）的结构均为3：29型结构。并且随V含量增加,金属间化合物Sm3（Fe1-xVx）29的晶格常数和晶胞体积V均呈减少趋势．当x〉0．05时,金属间化合物Sm3（Fe1-xVx）29中的杂质相明显呈现出来．随着V含量的增加,居里温度（R）星单调上升趋势．     

Investigation of HAP Nanoparticles Absorbed by Hepatoma Cells in vitro

Many particles are found in the cytoplasm area after the mixture of hydroxyapatite(HAP) nanoparticles and cultured cancer cells.The purpose of this study was to confirm whether these particles in cytoplasm are HAP nanoparticles exactly.BEL7402 cells were incubated in HAP sol for 8 hours.Then,the cells were collected for specimen preparation.Transmission electron microscope(TEM),energy dispersing spectrum (EDS)and electronic diffraction(ED)attached to TEM were used to detect the properties of the particles.It is found that many particles similar to HAP in shape are in the cytoplasm under TEM.By EDS analysis,they are the particles containing calcium(Ca)and phosphorus(P).The classic rings of HAP crystal appear in the ED pictures of these particles.So the particles are confirmed as HAP nanoparticles.Thus,it is concluded that HAP nanoparticles as the crystal particles can be absorbed by hepatoma cells.     

Growth habit of the basic oxysulfate magnesium whisker

The growth habit of the basic magnesium oxysulfate whisker was investigated based on the theoreticalmodelof anion coordination polyhedron growth units.It is found that typicalbasic magnesium oxysulfate whisker growth is consistent with anion tetrahedralcoordination incorporation rules.The growth units of basic magnesium oxysulfate whiskers are [Mg-(OH)_4]~(2-) and HSO_4~-.[Mg-(OH)_4]~(2-) is the favorable growth unit and whisker growth is in the direction of the [Mg-(OH)_4]~(2-) combination.A plurality of [Mg-(OH)_4]~(2-) s combine and become a larger dimensionalgrowth unit in a one-dimensionaldirection.Then HSO_4~- and larger dimensionalgrowth units connect as basic magnesium sulfate whiskers,according to the structuralcharacteristics of the basic magnesium sulfate whisker,which can guide the synthesis of magnesium hydroxide whisker.