2,158 research outputs found

    Study of Energy Transfer and White Light Communication by Metal Organic Frameworks

    Get PDF
    摘要 长程能量传递和激子转移,无论是在自然界光合作用体系还是人工设计的光 捕获系统都有着重要应用。在过去的一些有关能量转移的研究当中,主要工作都 集中在供体和受体“Through-space”的Förster型单线态以及Dexter型三重态能量 转移。而对更为重要的“Through-bond”能量转移却研究较少。 金属有机框架(MOFs)是一类由金属节点和有机配体组装而成的多孔材料, 其周期性的有序结构和灵活的可修饰特性,为设计能量转移模型带来了诸多便利。 香豆素343是一类摩尔消光系数高,荧光量子产率高的有机发光染料,在能量 转移研究中通常被用来作为受体分子。 本...Abstract Long range energy transfer and exciton migration plays an important role in artificial photosynthesis and light-harvesting system. Previous studies on through-space energy transfer is focused on Förster type singlet excited state and Dexter type triplet excited state, leaving the more important through-bond superexchange energy transfer unexplored. Metal-Organic Frameworks (MOF...学位:理学硕士院系专业:化学化工学院_无机化学学号:2052014115150

    Development of Catalysts for CWAO of Ammonia and the Effect of Weak Acid on Reaction

    Get PDF
    氨氮废水对环境的危害日益严重,无害化处理迫在眉睫。催化湿式氧化法(CWAO)是一种有效处理氨氮废水的方法,可在空气条件下一次性将氨氮转化为无害的氮气。本文采用CWAO处理氨氮废水,从解决催化剂活化氧能力及pH对反应的影响这两个角度出发,进行催化剂及弱酸对反应影响的研究。首先,利用Pd和Ni的协同作用,研制出低温高效双金属PdNi/DarcoG60催化剂。然后,根据pH对氨氮氧化反应的影响,创新性地利用弱酸根离子调节反应过程中H+的量,在温和的反应条件下提高催化剂催化湿式氧化性能。主要研究结果如下: 第一,载体和制备方法筛选表明,化学还原法制备的Pd/DarcoG60催化剂催化湿式氧化氨氮性能...The pollution of wastewater containing ammonia becomes more and more serious and harmless treatment of ammonia wastewater is crucial. Among the treatment methods, catalytic wet air oxidation (CWAO) is an effective technology for ammonia harmless treatment. In this work, CWAO is used to treat ammonia containing wastewater. The catalyst and the effect of weak acid on reaction are studied from two as...学位:工学硕士院系专业:化学化工学院_化学工程学号:2062014115139

    優秀な資質の学者 天児慧

    Get PDF

    从妈祖信仰的本容与变容来看其对文学的影响 -以上海、杭州、衢州为中心

    Get PDF
    派遣研究

    Synthesis of Monodisperse Metal Nanoparticles and Their Self-assembly into Nanoparticle Superlattices

    Get PDF
    金属纳米颗粒以其特殊的性质,在催化、数据存储、传感器等工业领域有着重要的应用。单分散金属纳米颗粒制备的研究,不仅可以帮助我们更加准确地理解金属纳米颗粒的特性,同时也是实现金属纳米颗粒自组装的基础。而纳米颗粒的自组装又是进一步构筑纳米器件的重要途径。本文采用有机液相法制备单分散镍、金、银纳米颗粒,并在此基础上利用溶剂挥发诱导自组装法以及界面自组装法对镍、金、银纳米颗粒进行自组装,同时通过透射电镜、扫描电镜、X射线衍射仪等仪器对产物进行了表征,探讨了组装过程中的影响因素。获得的主要结果如下: (1)以乙酰丙酮镍和油胺形成的配合物为前驱体,十六烷二醇和三辛基膦为表面活性剂,在210℃反应45min...Metal nanoparticles have attracted intensive attentions due to their amazing properties and potential applications in many fields such as catalysis, storage devices and sensors. Monodisperse nanoparticles can not only help us understand their properties better, but also be the fundamental of nanoparticle self-assembly which is a key step in construting large scale nano-devices. In this thesis, we ...学位:工学硕士院系专业:材料学院_材料加工工程学号:2072010115006
    corecore