氮掺杂二氧化钛光催化氧化降解污水中四环素  

PHOTOCATALYTIC OXIDATION OF TETRACYCLINE BY N-DOPED TITANIUM DIOXIDE IN WASTEWATER

作　　者：梁钊 李子富 周晓琴 倪结文 LIANG Zhao;LI Zi-fu;ZHOU Xiao-qin;NI Jie-wen(Department of Environmental Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China)

机构地区：[1]北京科技大学能源与环境工程学院环境工程系,北京100083

出　　处：《环境工程》2019年第3期92-97,共6页Environmental Engineering

基　　金：中央高校基础科研项目(FRF-TP-16-059A1)

摘　　要：以氮掺杂二氧化钛(N-TiO_2)作为催化剂,四环素作为目标污染物,以可见光作为光源,研究N-TiO_2在可见光源条件下,光催化氧化降解四环素的效果。当四环素初始浓度为50 mg/L时,在pH=8,催化剂投加量为1. 0 g/L较优的反应条件下,N-TiO_2光催化氧化降解四环素的效率可达到97%以上。研究表明:阴离子对降解过程有抑制作用,但对最终降解效果无显著影响。反应过程中起主要作用的活性基团为光生空穴。In this paper,N-doped titanium dioxide( N-TiO2) was used as the catalyst,tetracycline as the target pollutant,and visible light as the light source to study the effect of photocatalytic oxidation of tetracycline by N-TiO2 under the condition of visible light source. When the initial concentration of tetracycline was 50 mg/L,the better experimental conditions were pH= 8 and the dosage of the catalyst N-TiO2 of 1. 0 g/L,and the photocatalytic degradation efficiency of tetracycline by N-TiO2 could reach over 97% under such reaction condition. The study showed that anions restrained the degradation process,but they had no significant influence on the final degradation efficiency. The active group that played a key role in the degradation of tetracycline was photogenerated cavitation.

关 键 词：氮掺杂二氧化钛 光催化氧化 四环素 降解效果 

分 类 号：X703[环境科学与工程—环境工程]