摘要
采用水热法和溶胶-凝胶法制备TiO2纳米棒阵列(固载型)和TiO2/Fe3O4复合粒子(磁回收),SEM/TEM/XRD表征,应用于焦化废水降解对比实验。结果显示,实验室适度曝气、低功率紫外灯照射条件下,纳米级TiO2阵列和TiO2/Fe3O4复合粒子对废水化学需氧量(COD)和氨氮(NH3-N)的降解率分别达到了86.68%、71.96%和71.23%、60.98%,说明两种催化材料具有高催化活性,TiO2阵列相较复合粒子,光谱响应范围红移,有可见光催化应用前景,在污染物矿化应用中更具催化优势。
This paper deals with photo-degradation of COD and NH3-N in coking wastewater catalyzed by TiO2 nanorod arrays and TiO2/Fe3O4 composite particles. The particles were characterized by field emission scanning electron microscope (FE-SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD). UV-Vis, chemical oxygen demand analysis and photochemical kinetic analysis have been carried out in order to obtain the details of the photo-catalytic degradation and mineralization of contaminants. The results showed that these nano catalysts exhibited high photo-catalytic activities in photo-degradation of organic contaminants in coking wastewater. The degradation efficiencies of COD and NH3-N reach 86.68%/71.96% and 71.23%/60.98%.
出处
《物理化学进展》
2018年第4期153-162,共10页
Journal of Advances in Physical Chemistry
基金
陕西省教育厅专项科研计划项目(12JK0464)。
