Fabrication of Platinum Nanoparticles Encapsulated in Hollow Mesoporous Carbon Shell as Efficient Catalysts for Hydrogenation Reactions
Shigeru Ikeda, Takashi Harada, Natsumi Okamoto, Tsukasa Torimoto,２ and Michio Matsumura
Research Center for Solar Energy Chemistry, Osaka University, Toyonaka, 560-8531, Japan & 2Department of Crystalline Materials Science, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan
Studies on catalysis of metal nanoparticles (MNPs) have attracted much attention because their specific properties lead to inducing unique organic reactions. These MNP catalysts are usually preserved by organic ligands to prevent coalescence and used in homogeneous systems. One of the interests in designing practical catalysts is the heterogenization of MNPs by fixing on solid surfaces. Although numerous supported MNPs have been proved to catalyze a variety of reactions, these are still encountered by inevitable propensity of coalescence. In this study, we fabricated a ligand-free Pt nanoparticle (2.2 nm) encapsulated in a hollow porous carbon shell of ca. 30 nm (Pt@hmC) as a typical catalyst. Since the carbon shell not only acts as a barrier to prevent coalescence between Pt nanoparticles but also provides a void space where organic transformation occurs on the naked surface of the Pt nanoparticle, the Pt@hmC particle works as a robust and reusable heterogeneous catalyst for hydrogenation reactions.
Keynote lecture 5
Revenue Management: Applying Optimization Concept in Business
Department of Mathematics, Universiti Teknologi Malaysia
Revenue management is considered to be one of the most successful applications of operations research. It originated as a relatively obscure practice among a handful of major airlines and has grown to its status today as a mainstream business practice with a growing supporting industry of software and consulting firms. This presentation aims to provide an overview of its theory and practice as it is carried out today, and to demonstrate the basic concepts used to enhance firm revenues while selling the same quantities of products. Some of the major tools of revenue management will be reviewed and the underlying concepts discussed. Opportunities to contribute to research and practice in Revenue Management will also be highlighted.
Keynote lecture 6
Numerical Conformal Mapping by the Charge Simulation Method
Kaname Amano, Dai Okano, Hidenori Ogata & Masaaki Sugihara
Department of Electrical and Electronic Engineering and Computer Science,
Graduate School of Science and Engineering, Ehime University,
Department of Computer Science,
The University of Electro-Communications,
Department of Mathematical Informatics,
Graduate School of Information Science and Technology, The University of Tokyo
Conformal mapping of multiply connected domains are familiar in the problem of potential flow past obstacles. However, no simple method has been available for their computation till recently. We have proposed a numerical method for the conformal mapping of an unbounded multiply connected domain D exterior to closed Jordan curves onto the three types of canonical slit domains (Nehari, 1952), i.e., onto the parallel slit domain, the circular slit domain and the radial slit domain, subject to the condition . These conformal mapping are applicable to the problem of the uniform flow, a vortex flow and a point source flow, respectively. We here propose a numerical method for the same domains subject to the different condition. These conformal mappings are applicable to the problem of a dipole source flow, a vortex pair flow and a point source and sink flow. In the method, we express the mapping functions in terms of a pair of conjugate harmonic functions and approximate them, using the charge simulation method, by a linear combination of complex logarithmic functions. The method is simple without integration and suited for domains with curved boundaries.
Keynote lecture 7
Symbolic Computing for the Working Scientist
Robert Fitzgerald Morse
University of Evansville, Evansville, IN 47722 USA
Since the first computers were built researchers have been interested in having these machines do symbol manipulations and make exact calculations. Early examples include computing the cosets of finitely presented group (1953) and symbolic integration (1961). It is clear that what we do formally as scientists and mathematicians is manipulate symbols and make exact calculations. Essentially factoring a polynomial is an exercise in symbol manipulation. Donald Knuth and Peter Bendix in their seminal paper from 1967 formalize algebraic symbol manipulation in a precise manner such that it can be done on the computer. In this talk we will consider symbolic computations within the context of applications from engineering and science. In particular, aspect from computational group theory will be highlighted
Keynote lecture 8
Nanomaterials for Energy Conversion
Muhamad Yahaya1, Muhamad Mat Salleh2
1School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 UKM, Bangi, Selangor, Malaysia.
2Institute of Microengineering and Nanoelectronics, Universiti Kebangsaan Malaysia, 43600 UKM, Bangi, Selangor, Malaysia.
A great challenge for material scientists is to provide clean, affordable and sustainable energy. Most laboratories across the world continue to search for new materials and technique to generate energy. It is believed that a solution to the global energy problem will require revolutionary new technology, new approach as well as conserving the existing natural resources. Breakthroughs in nanotechnology can be utilized in solving the energy problem and this will introduce new technology, which is more efficient and environmentally friendly. In solar energy conversion, silicon based solar cell is still leading the market demand. However, the efficiency of the cell is low and prohibits the industrial scale application. The low cost solar cells are underdevelopment but the efficiency is not comparable with silicon. In this context, nanotechnology can play an important role in the development of organic solar cell, and in dye-sensitized solar cell, which shows a strong potential for commercialization. Solar energy group at UKM has been actively involved in these areas, and in this seminar, we will present a review works on nanomaterials for energy conversion.
Keynote lecture 9
Organic-less Separations: Let the Pressure and Temperature Work on
Mohd Marsin Sanagi, See Hong Heng and Wan Aini Wan Ibrahim
Separation Science Research Group, Department of Chemistry
Faculty of Science, Universiti Teknologi Malaysia
81310 UTM Skudai, Johor, Malaysia
Solvent polarity (dielectric constant) of a solvent varies with changing temperature. At elevated temperature, pure water exhibits solvating power comparable to organic solvents such as methanol- or acetonitrile-water mixtures at room temperature and ambient pressure. This can be used to great advantage in separation techniques such as pressurized liquid extraction (PLE) and liquid chromatography (LC). Good separations with acceptable column efficiencies are achievable at high temperature (100C-200C) using water-rich and superheated water as the eluent. For example, high temperature LC technique has been successfully applied to the separation of selected barbiturates using 100% pure water as the eluent. High temperature PLE has been demonstrated to offer outstanding extraction performance with a total of 4-fold reduction in total organic solvent consumption and up to 16-fold reduction in the total extraction time required against the Soxhlet extraction without significant loss in extraction efficiency. This paper elaborates on these potentials and possibilities of creating efficient separation techniques with less dependence on organic solvents while exploiting the power of temperature and pressure.