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关于卤族元素及其化合物的系列问题（3）——实验室制取Cl_2的问题

王笃年2015-01-01高中数理化

1实验室制取Cl2时,氧化剂为什么选用需要加热的MnO2而不选用不需要加热的KMnO4、K2Cr2O7等？实验室里用到少量Cl2时,一般采用氧化浓盐酸的方法制备.常用氧化剂有KMnO4、K2Cr2O7、MnO2（需加热）、漂白粉（有效成分Ca（ClO）2）.反应如下：2KMnO4＋16HCl=2KCl＋2MnCl2＋8H2O＋5Cl2↑。

Industrial Gas Emission ControlPigment Synthesis and PropertiesThermal and Kinetic Analysis

LECO CS-200和ELTRA CS-800的性能比较

Lei Zhu、Zhao Jun、杜书涛2015-01-01河北冶金

目前国内外测定钢铁中碳、硫应用最广的分析方法是高频红外碳硫分析技术。介绍了LECO CS-200和ELTRA CS-800的工作原理。利用基本的化学方法通过测定不同碳硫含量的钢样、铁样、煤和焦炭等试样,对比分析了LECO CS-200和ELTRA CS-800两台碳硫分析仪的性能。实验结果表明,两台分析仪的分析精度满足ASTME1019-2000的要求,能在实际生产中应用。

Metallurgical Processes and ThermodynamicsMetal Extraction and BioleachingCorrosion Behavior and Inhibition

SEM micrographs presenting nanofibers

Filippo Pierini、Sylwia Pawłowska、Paweł Nakielski2015-01-01Figshare

SEM figures presenting nanofibers on the microscope slides for three different compositions. EA1 - polyacrylamide hydrogel monomer mass ratio 37.5:1 AAm:BIS-AAm EA2 - polyacrylamide hydrogel monomer mass ratio 20:1 AAm:BIS-AAm EA3 - polyacrylamide hydrogel monomer mass ratio 4:1 AAm:BIS-AAm EN1 - polyacrylamide hydrog…

Nanofabrication and Lithography TechniquesElectron and X-Ray Spectroscopy TechniquesAnodic Oxide Films and Nanostructures

Разработка композитных материалов нового поколения типа «Ядро/оболочка» с возможностью их нагрева полем СВЧ

Ребров Евгений Викторович2015-01-01Transaction Kola Science Centre

During last few years, various composite magnetic materials have been developed for continuous synthesis of fine chemicals in flow reactors. NixZn1-xFe2O4@SiO2@TiO2 composite materials were developed by sol-gel synthesis in several steps. In the first step, a NixZn1-xFe2O4 magnetic core was formed. The weight ratio of…

Magnetic Properties and Synthesis of FerritesNanomaterials for catalytic reactions

Figure 10. Chemo-Selective Polymerizations Using Mixtures of Epoxide, Lactone, Anhydride and CO2. Figure 13.

Henry S. Rzepa、Charles Romain、Paul Dingwall 等 7 位作者2015-01-01Spiral (Imperial College London)

The control and selectivity exerted during ring-opening and ring-opening copolymerizations polymerizations, particularly using mixtures of monomers, is an important topic as it allows multi-block copolyesters/carbonates to be easily prepared in one-pot. Experimental and theoretical studies, using in situ infra-red spe…

biodegradable polymer synthesis and propertiesCarbon dioxide utilization in catalysisAdvanced Polymer Synthesis and Characterization

2D配位聚合物{[Eu（pdc）（ox）0.5（H2O）4]·2H2O}n的结构和荧光性质

王宏胜、夏军、张万强2015-01-01Acta Scientiarum Naturalium Universitatis Sunyatseni

用氯化铕和2,4-吡啶二甲酸在水热条件下反应合成了一个二维铕稀土配位聚合物{[Eu（pdc）（ox）0.5（H2O）4]·2H2O}n（1）（H2pdc=2,4-吡啶二甲酸;ox=草酸根阴离子）,草酸根离子由部分2,4-吡啶二甲酸分解产生。X-射线单晶衍射分析表明,该配位聚合物属单斜晶系,P121/c1（No.14）空间群,晶胞参数为a=1.53047（15）nm,b=1.10973（9）nm,c=0.85494（15）nm,β=102.81（1）°,α=γ=90°。Eu3＋为九配位,除了与一个pdc阴离子配体和一个ox阴离子配体螯合配位外,还与四个水分子配位。pdc阴离子通过2-位羧基以μ2-桥联方式连接两个Eu3＋,吡啶环上的…

Lanthanide and Transition Metal ComplexesMetal-Organic Frameworks: Synthesis and ApplicationsPolyoxometalates: Synthesis and Applications

Изменение поверхности и пористости магниетермических порошков тантала и ниобия в процессе термообработки

Орлов Вениамин Моисеевич、Прохорова Татьяна Юрьевна、Князева Анастасия Игоревна2015-01-01Transaction Kola Science Centre

Changes in the surface and porosity of tantalum powders, obtained by magnesium reduction of tantalum oxide and magnesium tantalate Mg4Ta2O9, and niobium powder obtained by magnesium reduction of magnesium niobate Mg4Nb2O9 have been studied. It has been shown that decreasing of surface and porosity in powders subjected…

Material Science and ThermodynamicsAdvanced ceramic materials synthesisMagnesium Oxide Properties and Applications

基于半刚性四面体四齿配体构筑的Zn（II）/Cd（II）配位聚合物及其性质

唐文渊、任世斌、朱冬冬 等 5 位作者2015-01-01无机化学学报

在水热的条件下,利用四（4-吡啶氧甲基）甲烷（L1）或四（3-吡啶氧甲基）甲烷（L2）、1,4-萘二甲酸（1,4-NDC）和d10金属离子发生自组装反应合成了2个化合物{[Cd2（L1）（1,4-NDC）2]·2H2O}n（1）和{[Zn2（L2）（1,4-NDC）2]·DMF·3H2O）}n（2）。单晶结构表明化合物1是通过L1配体与一维链[Cd（1,4-NDC）]n相连构建而成的三维骨架化合物,而化合物2是一对螺旋链与另外的一维链相互垂直交联而形成二维网络结构。更为重要的是,通过引入2种不同空间位阻的配体,研究了辅助配体对金属有机配位聚合物结构多样性的影响。另外,它们的荧光性质也做了相应的探讨。

Layered Double Hydroxides Synthesis and ApplicationsMagnetism in coordination complexesMetal-Organic Frameworks: Synthesis and Applications

NaAMC16S/AM/AA三元共聚物的合成及其溶液性能研究

王凤、Wang Chao、朱卓岩 等 6 位作者2015-01-01油田化学

以丙烯酰胺、丙烯酸和2-丙烯酰胺基十六烷基磺酸钠（NaAMC16S）为原料,制备了ZS-1、ZS-2、ZS-3（NaAMC16S单体加量分别为1%、2%、3%）三元共聚物,利用元素分析仪确定了共聚物的组成,考察了共聚物分子量、黏性、抗盐性、抗剪切性及注入性。实验测得ZS-1、ZS-2、ZS-3的相对分子质量分别为1661×10^4、921×10^4、523×10^4。元素分析结果表明,据S元素的含量计算共聚物的组成,ZS-1、ZS-2、ZS-3中分别含有0.998%、1.488%、1.973%NaAMC16S。随NaAMC16S含量的增大,共聚物分子量降低,黏度增加,抗盐性和抗剪切性提高。室温下经毛细管剪切后,ZS-1、ZS-2、…

Structural mechanics and materialsMicrobial Applications in Construction MaterialsMesoporous Materials and Catalysis

Phase controlled synthesis and characterization of noble metal nanomaterials

Zhanxi Fan2015-01-01OpenAlex

Noble metal nanomaterials have received extensive research interest owing to their unique physical and chemical properties, and various important applications like energy conversion and storage, surface enhanced Raman scattering (SERS), electronics, bioimaging and biosensing, information storage, photo-and electrocata…

Nanocluster Synthesis and ApplicationsGold and Silver Nanoparticles Synthesis and ApplicationsCopper-based nanomaterials and applications

Engineering Surface Traces for Self-Propulsion of Droplets

Vivienne Ng、Volker Nock、Mathieu Sellier2015-01-01UC Research Repository (University of Canterbury)

Self-propulsion of droplets may facilitate automated synthesis and analysis of small liquid samples in lab-on-a-chip applications1. Building upon previous work by our group2, this research aims to improve the mechanism of self-propulsion by means of prolonging the hydrophilicity of polydimethylsiloxan (PDMS) surface t…

Electrowetting and Microfluidic TechnologiesModular Robots and Swarm IntelligenceSurface Modification and Superhydrophobicity

A highly efficient solar light active iron (III)-doped TIO2 nano-catalyst for textile wastewater treatment

Fang Han、R. R. Naidu、Venkata Subba Rao Kambala2015-01-01Journal of Applied Geochemistry

Iron(III)-doped TiO2 nano photocatalyst was prepared via a simply modified sol-gel process at ambient conditions. The sample was characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), photoluminescence (PL) emission spectra, UV-Vis diffuse reflection s…

TiO2 Photocatalysis and Solar CellsAdvanced Nanomaterials in CatalysisAdvanced Photocatalysis Techniques

Cu（I）金属有机骨架材料在汽油吸附脱硫中的应用

任靖、曹光伟、Zhang Zu Yong2015-01-01Acta Scientiarum Naturalium Universitatis Sunyatseni

以金属骨架材料Cu3（4，4＇-bipy）2-（O3SCH2CH2SO4）为吸附剂，研究了吸附时间、吸附剂用量和1-辛烯含量等对模拟油脱硫的影响。结果表明，在常温常压、Cu和S物质的量比为2、烯烃质量分数为30N、吸附时间120min下，脱硫率可达75．6％。在此基础上，研究了其对加氢后汽油的吸附脱硫效果。结果表明，吸附剂可以把加氢后汽油的含硫质量分数从40μg／g降低到8μg／g；再生后的吸附剂重复使用6次，其性能基本不变。

Corrosion Behavior and InhibitionMetal Extraction and BioleachingIndustrial Gas Emission Control

稀土Y2O3和Gd2O3共掺杂对La2（Zr0.7Ce0.3）2O7陶瓷相结构及热膨胀系数的影响

乔璟、辛娜、谢敏 等 4 位作者2015-01-01Acta Scientiarum Naturalium Universitatis Sunyatseni

采用固相合成法制备了（La1-2xYxGdx）2（Zr0.7Ce0.3）2O7（x=0,0.30,0.35,0.40,0.45,0.50）体系陶瓷材料.分别利用XRD、扫描电子显微镜和高温热膨胀仪对陶瓷材料的相组成、微观形貌及热膨胀系数进行测试.结果表明.掺杂量x=0时为立方烧绿石结构,x≥0.30时为立方萤1石结构;晶粒发育良好,晶界清晰;Y2O3和Gd2O3的掺杂可以有效的提高La2（Zr0.7Ce0.3）2O7的热膨胀系数.

Nuclear materials and radiation effectsLuminescence Properties of Advanced MaterialsAdvanced ceramic materials synthesis

New strategies to synthesize nanosized oxides

Shin Hwei Tan2015-01-01DR-NTU (Nanyang Technological University)

Nanotechnology is an emerging field that focus on reducing a material from macro scale to nanoscale. Nanosized oxides have been attracting attention due to better properties achieved when a bulk materials goes into nano scale. It is frequently used in applications such as energy storage, catalysts, microelectronic dev…

Chemical and Physical Properties of MaterialsElectrophoretic Deposition in Materials SciencePigment Synthesis and Properties

Modelling crack growth in quasi-brittle materials using mesh fragmentation technique

Michael A. Maedo、Osvaldo L. Manzoli、Luís A.G. Bitencourt 等 4 位作者2015-01-01Deposito de Investigacion Universidad de Sevilla (University of Seville)

Congreso celebrado en la Escuela de Arquitectura de la Universidad de Sevilla desde el 24 hasta el 26 de junio de 2015.

Graphite, nuclear technology, radiation studiesAdvanced Surface Polishing TechniquesHigh-Velocity Impact and Material Behavior

Разработка состава футеровки индукционных печей из первоуральского кварцита и практика его применения

Завёрткин Александр Сергеевич2015-01-01Transaction Kola Science Centre

The factors upgrading the service life of the induction crucible furnaces linens have been considered. The results of both the laboratory study and the industrial tests are given for the Pervouralsk quartzite minefield. The influence of impurity content on the linen wear resistance of crucible induction furnaces has b…

Material Properties and ApplicationsIndustrial Engineering and TechnologiesEngineering and Environmental Studies

二（4-硝氨基呋咱基-3-氧化偶氮基）偶氮呋咱的合成及热性能

胥立文、郑春梅、王天易 等 8 位作者2015-01-01OpenAlex

以乙二醛为原料,经过中间体二（4-氨基呋咱基-3-氧化偶氮基）偶氮呋咱（ADAAF）,合成了高能材料二（4-硝氨基呋咱基-3-氧化偶氮基）偶氮呋咱（ADNAAF）。用红外、核磁、质谱等表征了其结构。分析了在溴酸钾和冰乙酸的氧化体系下合成中间体ADAAF的影响因素,确定最佳工艺条件为：反应温度50℃,反应时间16 h,冰乙酸与3,3＇-二氨基-4,4＇-氧化偶氮呋咱（DAOAF）摩尔比为68∶1,收率为58.5%。采用差示扫描量热法和热重分析研究了ADNAAF和ADAAF的热性能。结果表明,ADAAF的分解温度为267.18℃,热重变化范围50-500℃,共失重90.91%;ADNAAF的分解温度为114.81℃,热重变化范围70-…

Energetic Materials and CombustionSubcritical and Supercritical Water ProcessesThermal and Kinetic Analysis