Preparation and characterization of the suspension TiO2 slurry

• Main Authors: Wen-Yen Huang, 黃文衍
• Other Authors: Ming-Shyong Tsai
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/94820350546405267341

碩士 === 南台科技大學 === 化學工程與材枓工程系 === 98 === The effect of the HCl concentration and the reaction temperature on the formation of TiO2 powder was investigated. The H2O2 addition to improve the photo catalysis properties (which was measured by the decomposition of methyl orange dye) of TiO2 slurry was also discussed in this article. The rutile phase in the formation powder was increased to formed the mixing phase TiO2 by increasing the HCl concentration. The mixing phase powder leads to improve the photocatalytic efficiency of TiO2 powder. According to the experimental results, the best HCl concentration is about 1.2M HCl. The product shows the rod-like with spherical powder mixture as the formation temperature at 60℃. The rod-like particles are rutile phase TiO2 and the spherical particles are anatase TiO2. The photocatalyst efficiency of this mixture is better than that of pure rutile or pure anatase powder. The 1mg/L methyl orange can be decomposed completely after exposing in UV light for 50 min. The best formation temperature is at 60℃. In addition, the photocatalysis can be improved by adding H2O2 to TiO2 slurry. The better concentration of H2O2 is in the range 10mM ~ 1M. The 1mg/L methyl organic was completely decomposed during 4~5 min by using TiO2 with H2O2. Adding H2O2 can also enhance photocatalysis property of TiO2 slurry in the visible light. The 1mg/L methyl organ could be completely decomposed during 2hr as exposing in visible light.