Synthesis of Hierarchically Porous Materials for Drug Delivery and Electrochemical Cells

• Main Authors: Hong-Yuan Lian, 連泓原
• Other Authors: 吳嘉文
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/83017356679479935992

博士 === 國立臺灣大學 === 化學工程學研究所 === 102 === In this dissertation, techniques such as self-etching and hard template method were employed to synthesize materials with hierarchically porous structure, including microporous coordination polymer with hollow structure and macroporous carbon microballs. These synthesized porous materials were further applied in drug carrier, lithium-ion battery and glucose fuel cell. In chapter 1, classification and common synthesis of nanoporous materials, and advantages of hierarchically porous structure are introduced. In chapter 2, facile synthesis of materials with hierarchically porous structure is reviewed. In chapter 3, microporous coordination polymer (Prussian blue, PB) with hollow structure is synthesized and employed as drug carrier to load anti-cancer drug for killing tumor. PB mesocrystal with size of 110 nm went through self-etching to create a macorporous hollow interior with diameter of 80 nm. Hollow PB showed high biocompatibility and pH stability, and these properties assumed a potential drug carrier. Anti-cancer drug (cisplatin) got stuck in micropores tightly to reduce drug leakage in advance; even so, cisplatin adsorbed on the surface of hollow PB still performed cytotoxicity through cross-linking DNA of cancer cell. In chapter 4, macroporous carbon microballs (MCM) are synthesized and work as anode of lithium ion battery. At first, silica opal microballs were prepared through evaporation-induced self-assembly in emulsion, and then served as a hard template to obtain macroporous amorphous carbon microball (A-MCM) with pore diameter of 260 nm. A-MCM provided large number of storage sites for lithium, and obtained first charge capacity of 1542.2 mAh/g, which is around 4.1 times higher than theoretical capacity of graphite. In addition, reversible capacity of A-MCM climbed to 1478.4 mAh/g after 60 cyles. By synergistic effect of macroporous structure and graphitization (G-MCM), capacity still remained 254.5 mAh/g while rate changed from 0.1C to 20C. In chapter 5, macroporous graphite microballs (G-MCM) acted as catalyst support for glucose fuel cell. Taking advantage of macoporous structure and graphite phase, Pd@G-MCM exhibited the highest electrochemical active surface area among all electrocatalysts under similar Pd size and amount. Assembling as glucose fuel cell, G-MCM performed maximum power density 2 times higher than XC72 and 11.8 times higher than conventional graphite. In chapter 6, studies and suggestions in every chapter are summarized.