摘要
通过离子印迹技术,利用聚邻苯二胺将过渡金属离子固定在TiO2/粉煤灰空心微珠上.通过扫描电子显微镜(SEM)、能量色散谱(EDS)、X射线衍射(XRD)、傅里叶变换红外(FT-IR)以及紫外—可见漫反射光谱(UV-Vis DRS)对制备好的离子印迹光催化剂进行表征.研究了离子印迹光催化剂在可见光下降解四环素、土霉素、环丙沙星、盐酸四环素及氯霉素的光催化活性.结果表明,过渡金属离子印迹光催化剂可以在循环系统中有效地提高光电子和空穴的分离率,并且提高了降解抗生素废水光催化活性.四环素的降解率相对更高,C1对5 mg L-1的四环素废水的降解率可达72.6%.根据实验结果提出了制备过程以及光降解过程的机理.
Transition metal ions-TiO2/fly-ash cenospheres were prepared by ions imprinting technology,which transition metal ions have been immobilized on TiO2/fly-ash cenospheres with poly-o-phenylenediamine.The ions imprinting photocatalysts have been characterized by scanning electron microscopy（SEM）,energy dispersive spectroscopy（EDS）,X-ray diffraction（XRD）,Fourier transform infrared（FT-IR） and UV-Vis diffuse reflectance spectra（UV-Vis DRS）.The photocatalytic activity of photocatalysts was studied by the degradation of tetracycline,oxytetracycline,ciprofloxacin,tetracycline hydrochloride and chloromycetin under visible light.The experimental results showed that the ions imprinting photocatalysts could effectively increase the separation rate of photoelectrons and holes in the cycling system.So photocatalytic activity of degradation on the antibiotics solution can be improved.And the photodegradation rate of 5 mg·L-1 tetracycline could reach 72.6%.Meanwhile,according to our experimental results,the mechanisms of preparation and photodegradation process of ions imprinting photocatalysts were proposed,respectively.
出处
《吉林师范大学学报（自然科学版）》
2012年第4期6-11,共6页
Journal of Jilin Normal University:Natural Science Edition
基金
国家自然基金项目(21207053)
教育部博士点专项基金(20113227110019)
中国博士后基金项目(2012M511219)
关键词
过渡金属离子
导电聚合物
离子印迹技术
TiO2
漂珠
抗生素
transition metal ions
conducting polymer
ions imprinting technology
TiO2/fly-as cenospheres
antibiotics
