The Preparation and Catalytic Application of Ionic-Liquid Immobilized Pd Nanoparticles on Al2O3

• Main Authors: Hsiu-Yuan Lu, 呂秀媛
• Other Authors: Kai-Ming Chi
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/74884401184656389532

碩士 === 國立中正大學 === 化學暨生物化學研究所 === 101 === Catalytic surface area is an important factor of the metal catalytic efficiency. Metal nanoparticles are good for catalysis, because the size is very small. Nanoscaled catalysts have more surface atoms and active sites. The potential energy of surface atoms is higher than internal atoms, so nanoparticles have great catalytic efficiency. The particles size of metal nanoparticle catalysts are very small, so they are difficult to separate with the reactants or products. This study is used palladium nanoparticles to loaded on the carrier Al2O3 or SiO2 particles, forming palladium nanoparticles/carrier. And we added the ionic liquid to stale palladium nanoparticles of palladium nanoparticles/carrier, forming palladium nanoparticles/ionic liquid/carrier catalytic system. The system combines many characteristics that include high reactivity of nano-catalysts, easily separate and recycle of fixed catalytic systems. It’s enhance the practicality and environmentally of nano-metal catalysts, and conducive to industrial applications. The study used palladium nanoparticles/ionic liquid/carrier to discuss the catalytic activity of heck reaction. We change the added amount of Pd nanoparticles, organic base, reaction temperature and reaction time that can compare the catalytic conversion rate of different systems. Pure palladium nanoparticles may easy to decomposition or aggregation during the reaction, and resulte catalytic efficiency decrease when recycle number increase. The fixed catalytic systems with ionic liquid, can be repeated up to 20 times, and they don’t lose its activity.