Chen Shijie, Zhai Xunan, Li Yingjie, Li Jinlong, Lü Renjiang, Wang Peng, Tang Xiaojun, Chen Xi, Gao Lidi
College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar, 161006, China.
State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin, 150090, China.
J Nanosci Nanotechnol. 2018 Apr 1;18(4):2472-2480. doi: 10.1166/jnn.2018.14288.
A novel C/Fe-BiVO4 nanosheet composite photocatalyst combining the properties of both semiconductor and Fenton like catalyst was prepared via a two-step method involving Resin carbonization and hydrothermal process. The samples were characterized by X-ray diffraction (XRD), scanning electronic microscopy (SEM) and energy dispersive spectroscopy (EDS), transmission electron microscopy (TEM), UV-vis diffuse reflectance spectra (DRS), X-ray photoelectron spectroscopy (XPS), Fourier transformed infrared spectroscopy (FT-IR) and nitrogen adsorption-desorption measurements and fluorescence spectrum technique. Structure analyses indicated that C/Fe-BiVO4 presented a nanosheet and macro-meso dual porosity structure. Photocatalytic degradation of cipfloxacin (CIP) (10 mg/L) was studied using C/Fe-BiVO4 under simulated solar light (SSL) irradiation in a cylindrical reactor. Three experimental parameters were chosen as independent variables: pH, C/Fe-BiVO4 concentration, and H2O2 concentration. The catalyst shows high catalytic activity in cipfloxacin photodegradation reaction with the cipfloxacin conversion efficiency higher than 95.61% at experimental conditions (catalyst dose, 0.75 g · L-1; H2O2 dose, 200 mg · L-1; solution pH, 5.0). The process obeyed the pseudo first-order kinetics by assuming a constant concentration of OH•. The as-prepared composite exhibited high efficiency in the photocatalytic decomposition of Cipfloxacin (CIP) by the assistance of H2O2. This method is promising due to its inexpensive starting materials and good photocatalyst for degradation of emerging micropollutants.
通过两步法，即树脂碳化和水热过程，制备了一种结合了半导体和类芬顿催化剂特性的新型C/Fe-BiVO4纳米片复合光催化剂。通过X射线衍射（XRD）、扫描电子显微镜（SEM）和能量色散光谱（EDS）、透射电子显微镜（TEM）、紫外可见漫反射光谱（DRS）、X射线光电子能谱（XPS）、傅里叶变换红外光谱（FT-IR）以及氮吸附-脱附测量和荧光光谱技术对样品进行了表征。结构分析表明，C/Fe-BiVO4呈现出纳米片和大-介观双孔隙结构。在圆柱形反应器中，在模拟太阳光（SSL）照射下，使用C/Fe-BiVO4研究了环丙沙星（CIP）（10 mg/L）的光催化降解。选择三个实验参数作为自变量：pH值、C/Fe-BiVO4浓度和H2O2浓度。该催化剂在环丙沙星光降解反应中表现出高催化活性，在实验条件下（催化剂剂量，0.75 g·L-1；H2O2剂量，200 mg·L-1；溶液pH值，5.0）环丙沙星转化效率高于95.61%。通过假设OH•浓度恒定，该过程符合准一级动力学。所制备的复合材料在H2O2的辅助下，对环丙沙星（CIP）的光催化分解表现出高效率。由于其起始材料价格低廉且是降解新型微污染物的良好光催化剂，该方法具有广阔的应用前景。
