A study of water splitting reaction on Pt/N-TiO2 under visible light irradiation

• Main Authors: Heng-Chieh Hung, 洪珩婕
• Other Authors: Wu, Ren-Jang
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/36470204950024230128

碩士 === 靜宜大學 === 應用化學研究所 === 98 === The purpose of this research is to investigate the process of dopping nitrides to titanium dioxide and the subsequent change in the structure of titanium dioxide on impregnation of platinum to the surface, in order to create a set of photo-catalytic N-TiO2. Within visible light irradiation, pure titanium dioxide does not produce to any hydrogen but impregnate platinum cation the surface of Titanium dioxide. Since Platinum has the ability to emit electrically this consequently improves the yield of Hydrogen. The photo-catalytic activities of Pt/N-TiO2 for water splitting reaction under visible light irradiation were investigated. The photo-catalytic reaction was carried out in a Pyrex glass reactor equipped with cooling water. A 300W mercury arc lamp was mounted on the reactor and a filter was added to eliminate any wave under 400 nm. photo-catalytic reaction of water splitting was performed in 250 ml methanol solution (10 vol%) containing about 0.5 g catalyst at room temperature. The results have shown that the yields of H2 on 03 wt% Pt/TiO2 were 15.36 μ mol/1h．1g, which was emitted by N-TiO2 which improved at 0.03 wt% Pt/N-TiO2 leading to 17.1μ mol/1h．1g. During the process of making photo-catalysis, there are different outputs of hydrogen production within certain period of time due to the source. Among all different ways of hydrogen production, Ammonia is the most stable one. However changing mole percentage of Ti and N can improve the output of hydrogen production, N/Ti ＝6 is the best ratio. In addition, output of hydrogen yield could up must to 40.8 μ mol/1h．1g.