纳米TiO2阵列和TiO2/Fe3O4复合剂降解焦化废水对比应用研究
Contrast on Coking Wastewater Degradation Catalyzed by TiO2 Nanorod Arrays and TiO2/Fe3O4 Composite Particles
DOI: 10.12677/JAPC.2018.74019, PDF,    科研立项经费支持
作者: 李玉祥*：西安建筑科技大学，材料与矿资学院，陕西 西安；高敏江：中国科学院，生态环境研究中心，北京;北京大学，工学院，北京
关键词: 焦化废水；TiO2纳米棒阵列；纳米TiO2/Fe3O4复合粒子；COD；NH3-N；Coking Wastewater； TiO2 Nanorod Arrays； TiO2/Fe3O4 Composite Particles； COD； NH3-N
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。
Abstract: 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%.
文章引用：李玉祥, 高敏江. 纳米TiO2阵列和TiO2/Fe3O4复合剂降解焦化废水对比应用研究[J]. 物理化学进展, 2018, 7(4): 153-162. https://doi.org/10.12677/JAPC.2018.74019

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