암모니아수를 이용한 N-doped TiO 2 제조 및 부식산의 광촉매 분해

Synthesis of N-doped Titania using Ammonium Hydroxide and Photocatalytic Degradation of Humic Acid

To advance luminance efficiency of Titania at visible range, N-doped TiO 2 was prepared by using ammonium hydroxide as a source of nitrogen. The photoactivities of the synthesized TiO 2 were evaluated on the basis of degradation of humic acid in aqueous solutions with different light sources, UV-C, UV-A and fluorescent lamp. As a result, at UV-C is high efficiency UV 254 decrease and TOC removal. In this study, the best synthetic conditions of N-doped TiO 2 were 5.0 M of ammonium hydroxide concentration and calcination temperature of 550℃. The degradation rate of humic acid as an evaluation of photoactivities of the catalysts were conducted with pH variation, decrease rate of molecular absorption, removal rate of total organic carbon and fluorescece evolution for humic acid solution. XRD and SEM were applied for analysis of surface analysis of the catalysts.