X射线光电子能谱
催化作用
漫反射红外傅里叶变换
扫描电子显微镜
降级(电信)
化学
核化学
紫外可见光谱
光谱学
盐酸盐
光催化
化学工程
材料科学
有机化学
复合材料
电信
物理
量子力学
计算机科学
工程类
作者
Lu Liu,Yinghua Li,Chaoqun Zhu,Jingwen Zhang,Chen Li-jun
标识
DOI:10.1016/j.optmat.2023.114200
摘要
In this study, Bi2O3/BiFeO3 composites were synthesized by co-precipitation method, which was used to activate peroxymonosulfate (PMS) to degrade levofloxacin hydrochloride (HCl-Lev). The physicochemical properties of Bi2O3/BiFeO3 were regulated by changing the precursor pH, and the structure and morphology were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and ultraviolet–visible diffuse reflectance spectroscopy (UV–Vis). Secondly, the effects of different conditions (precursor pH, pollutant concentration, catalyst dosage, PMS concentration, different anion concentration) on the removal of Lev were investigated. The response surface method (RSM) was used to optimize the experiment parameters and judge the key factors and their interactions. The results showed that the optimal degradation rate of Lev by Bi2O3/BiFeO3/Vis/PMS system was 91.2% ± 1.9% at pH = 7, catalyst dosage 0.5 g/L and PMS concentration 0.4 g/L, which had no significant difference with the predicted value of response surface. After 5 cycles of testing, the degradation rate still reached 83.5% ± 1.0%. Finally, through the radical scavenging experiments, SO4−∙、 ∙OH and h+ were the main active substances. The possible catalytic mechanism of Bi2O3/BiFeO3/Vis/PMS system was proposed.
科研通智能强力驱动
Strongly Powered by AbleSci AI