Hydrothermal Synthesis of TiO2 Nanofiber Modified Electrode for Visible Light Water Splitting

• Main Authors: Tai-you Chen, 陳泰佑
• Other Authors: Tse-chuan Chou
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/37982477448508201249

碩士 === 國立成功大學 === 化學工程學系碩博士班 === 97 === In recent years, advanced countries have began to actively search for alternative energy with the oil crisis. Hydrogen energy be paid attention as a next-generation energy carrier in particular. It is inexhaustible from the raw material of hydrogen in water. It does not have pollution problems because the product of hydrogen combustion is water in line with environmental awareness. Fujishima and Honda discovered water splitting on TiO2 electrodes for H2O decomposition into H2 and O2 under ultraviolet light irradiation in 1972. TiO2 is excited to only under ultraviolet light irradiating. How to make use of visible light to utilize the photo energy with only 5% of sunlight for UV and reduce the recombination of the electrons and holes is always the most important issue in the photocatalytic. In this study, we use titanium dioxide powder and Ti foil in sodium hydroxide, placed in a pressure reactor in the preparation of high specific surface area of titanium dioxide nanofiber. The synthesis of TiO2 nanofiber has excellent photocurrent at 8hr in the 10 M NaOH at 150℃. TiO2 nanofiber have the best crystalline anatase crystalline in 550℃by air calcination. The doping of a small amount nitrogen into TiO2 nanofiber was performed under a stream of ammonia gas. The N-doped TiO2 showed improved visible light absorption property and increase the energy utilization rate.