| 초록 |
Visible light responsive titania photocatalyst was prepared by sol-gel process and was calcined at different temperatures. The photocatalytic experimental result demonstrates that titania complex can effectively phodegrade methylene blue under visible light irradiation. Effect of calcinations temperature on the crystal phase and crystallite size was also investigated. The particle size of titania sol was ca. 10 nm. The crystallite size of titania complex were increased from ca. 7 to 35nm with calcinations temperature increasing from 200 to 800 ℃. And in case of wall-paper coated with titania sol, the deodorization efficacy was considerably increased above 98.3% and 97.8% for formaldehyde and ammonia cause indoor air pollution. Also, the disinfectant activity for Escherichia coli and Staphylococcus aureus was showed superior character above 99.9% after 24 hours. From these results, formaldehyde and ammonia can effectively be removing by titania sol prepared in this study. In addition, this photocatalysis was found to give a very high efficiency for disinfection of Escherichia coli and Staphylococcus aureus. |
