Preparation and Characterization of Electro-conductive Ti1-x(Bi)xO2 Catalyst Powder by Sol-Gel Process

• Main Authors: Che-Wei Li, 李哲瑋
• Other Authors: Wu-Jang Huang
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/87261793020286678813

碩士 === 國立屏東科技大學 === 環境工程與科學系所 === 99 === How to use the photo-catalytic property of titanium dioxide (TiO2) in the air pollution control, for the removal of organic pollutants in environmental has caused much attentions internationally. The TiO2 photocatalyst can change its original absorption of excitation energy in the combination with other atoms into new elements; can make the TiO2 photocatalyst in visible light to be able to have a good efficiency. Until now any TiO2 catalyst must be photo excited by light has become a limitation in engineering applications. Researchers rarely reported that TiO2 can be excited electronically. If we can prepare a electro-conductive TiO2, then we can drive TiO2 photocatalyst by electricity. In this study we have used the sol-gel process to synthesis Bi/TiO2 powder, with the doping of the bismuth (Bi) 1 to 90% successfully. And experimental data result show the combination of Bi into TiO2 can increase conductivity to 98%. Use the Bi/TiO2 conductive catalyst powder to removal methyl bule dye from water solution, data shows that the best doping ratio is 1%, and other one better ratio is 90%, but Bi is very expensive so add less Bi would be more economic for future application.