School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China.
J Hazard Mater. 2013 Apr 15;250-251:131-7. doi: 10.1016/j.jhazmat.2013.01.066. Epub 2013 Feb 4.
The Bi2O2CO3/Bi3NbO7 (BiCO/BiNbO) composite was successfully fabricated by a simple hydrothermal method and found to be an effective visible-light-driven photocatalyst for inactivation of Escherichia coli (E. coli). The BiCO/BiNbO composite was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), UV-vis diffuse reflectance spectrum (UV-vis DRS), and Fourier transform infrared (FT-IR) spectroscopy. The BiCO/BiNbO composite exhibited largely enhanced photocatalytic inactivation of E. coli as compared to the pure Bi3NbO7 under visible light irradiation. The enhanced photocatalytic performance can be attributed to the improved separation efficiency of the photogenerated holes and electrons. In addition, the possible bactericidal mechanism of the BiCO/BiNbO composite under visible light irradiation was discussed.
采用简单的水热法成功制备了 Bi2O2CO3/Bi3NbO7（BiCO/BiNbO）复合材料，并发现其是一种有效的可见光驱动光催化剂，可用于灭活大肠杆菌（E. coli）。通过 X 射线衍射（XRD）、扫描电子显微镜（SEM）、高分辨率透射电子显微镜（HRTEM）、紫外可见漫反射光谱（UV-vis DRS）和傅里叶变换红外（FT-IR）光谱对 BiCO/BiNbO 复合材料进行了表征。与纯 Bi3NbO7 相比，BiCO/BiNbO 复合材料在可见光照射下表现出对大肠杆菌的光催化灭活性能大大增强。增强的光催化性能可归因于光生空穴和电子的分离效率提高。此外，还讨论了 BiCO/BiNbO 复合材料在可见光照射下的可能杀菌机制。
