Materials Literature
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입상(대나무)활성탄 상에 나노 $TiO_2$ 결정을 담지 즉 분말코팅 하였다. 이와 같이 $TiO_2$ 담지된 활성탄 복합체의 광촉매 활성도는 자외선 조사를 통한 메틸렌블루 수용액의 분해를 통해 측정하였다. 저온 수열합성법( ${\leq}200^{\circ}C$ , pH 11)을 통해 광학적 촉매활성도가 높은 $TiO_2$ 를 활성탄 상에 담지 할 수 있었으며, BET 표면적을 측정하여 계산된 $TiO_2$ 분말의 평균입도는 50 nm 정도였다. 수열처리 과정에서 $TiO_2$ 가 합성되면서 동시에 활성탄의 표면 공극과 기공 상에 코팅이 이루어졌다. 이러한 수열합성…
In this study, microporous ZIF-7 (zeolitic imidazolate framework-7) and meso-micro PB (Prussian Blue) particles were successfully incorporated into chitosan (CS) membranes to form mixed-matrix membranes (MMMs). The as-prepared MMMs were used to separate mixtures of water/ethanol at 25oC in the pervaporation process. I…
Ionische Flüssigkeiten (Ionic Liquids, ILs) finden zunehmend Verwendung in elektrochemischen Anwendungen. Eine dieser Anwendungen ist der Einsatz als Elektrolyt in farbstoffsensibilisierten Solarzellen (Dye-Sensitised Solar Cells, DSSCs). In vorliegender Arbeit wurden zunächst mittels Buchwald-Hartwig-Aminierung p-sub…
graphene without metal (ρG) and graphene underneath Ni (ρG M ) with different Ni length ( LM) was studied. ρG shows a sharp carrier density modulation, while ρG M decreases with increasing LM. It was strongly suggested that the graphene condu ctivity was not significantly affected by the metal contact. In the conventi…
Quantum yield represents one of most fundamental and important properties of photoluminescent materials and eventually determines the suitability of materials for the applications in optical devices, analysis, biosensing, and fluorescence imaging. Despite that a variety of methods have been developed to measure the qu…
采用润湿平衡法测定了不同试验温度下Sn-Zn-Ga-Nd无铅钎料在纯锡、SnBi和Au/Ni三种镀层上的润湿时间和润湿力,研究了钎焊温度对钎料在不同镀层上润湿性能的影响.结果表明,钎料的润湿性能随着温度升高而提升,表现为润湿时间缩短,润湿力增大;在240℃时,Sn-Zn-Ga-Nd无铅钎料在三种镀层上的润湿时间均已满足电子行业标准IPC中t0≤1 s的要求,其中纯锡和SnBi镀层的综合润湿性能更好.
The basis of supramolecular chemistry is a detailed knowledge of fundamental molecular properties and non-covalent interactions, which is dedicated to the preparation of novel structures as functional materials. Here we discuss the design and synthesis of such new molecular self-assemblies. Based on the structures and…
Radiation in LEO (Low Earth Orbit) is mainly composed of primary particles: GCR (Galactic Cosmic Rays), SEP (Solar Energetic Particles), SAA (South Atlantic Anomaly) particles and albedo neutrons and protons from the Earth's atmosphere. When the primary particles enter/pass through the space vehicle shielding and the…
Considering the level of current interests in the continuous synthesis of Titania, the Chemical and Manufacturing Industry is expected to benefit from the results of this work which proposed and implemented a tailor-made scheme for the continuous synthesis of Titania nanoparticles to develop a process with improved en…
A hierarchical porous electrode using a micron-sized honeycomb-like carbon material for high capacity lithium-oxygen batteriest
The synthesis, characterization and dielectric properties of the polycrystalline rare earth oxides Ba2SmNbXMo1-XO6 compounds were investigated. Powder X-ray diffraction patterns show that all these samples are single phase without any impurity. The dielectric properties of these compounds were studied in the frequency…
以Mg-6Al-2Ca-2Nd合金为研究对象，在410℃固溶处理不同时间。通过金相显微镜和扫描电镜观察、能谱分析及硬度测试研究了固溶处理态Mg-6Al-2Ca-2Nd合金组织和性能。结果表明，经固溶处理后，铸态Mg-6Al-2Ca-2Nd合金发生再结晶，铸态枝晶组织特征消失，呈现等轴晶组织特征。随着固溶时间的增加，金属问相含量减少，晶粒尺寸变得粗大；硬度先降低后升高，最后又降低，经20h固溶后，硬度值最大。
Metal-organic frameworks consist of metal ions connected by organic ligands. When the metal ions and organic ligands link together in the right geometry, polymeric and infinite 1D chains or 2D and 3D networks are formed. Porous metal-organic frameworks were synthesized from the organic ligand 4,4′-bipyridine (bpy) and…
Test methods for the characterization of the properties that are essential for thermophysiological comfort include the measurement of heat and water vapor in the static and dynamic condition. These test methods can be divided into three groups: methods of fabric properties measurement, methods of the garment propertie…
The goal of this study is to develop a self-assembly synthetic strategy for the preparation of coordination polymers using isoindoline-based ligands, 1,3-dioxo-2-(3-pyridinylmethyl)-5-isoindolinecarboxylic acid (HIn3Mepy) and 1,3-dioxo-2-(4-pyridinylmethyl)-5-isoindolinecarboxylic acid (HIn4Mepy). Several coordination…
An unexpected effect of water on the asymmetric hydrogenation of α-ketoesters on platinum nanoparticles confined in carbon nanotubes
Die Verwendung metallischer oder Metall-beschichteter Mess-Sonden für die Rastersondenmikroskopie (SPM – engl. scanning probe microscopy) ist die Voraussetzung für die Kombination mit der Oberflächenverstärkten Raman-Spektroskopie (SERS – engl. surface-enhanced Raman spectroscopy). Bei dem als Spitzenverstärkte Raman-…
A number of silica-based nanomaterials have been developed in recent years. An important application of these nanomaterials is in the field of biological and biomedical applications. However, a major concern about the safety of the nanomaterials in vitro has been proposed. To address this problem, several approaches h…
Magnesium alloys have been advocated as potential artificial bone materials due to their biocompatibility and biodegradability. The understanding of their corrosive mechanism in physiological environments is therefore essential for making application-orientated designs. Thus, this in vitro study was designed to assess…
The lead-free ferroelectric system 0.75Bi0.5K0.5TiO3-0.25BiFeO3 has been investigated with respect to crystallographic texturing. Recent studies have shown that the system have promising electromechanical properties and may be an alternative for replacing lead zirconate titanate (PZT). Texturing was performed on the s…