He Yingxiang, Men Dongsheng, Pang Yuxiang, Guo Huaijiao, Gu Jianmin, Li Adan
Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, Hebei, China.
Key Laboratory of Metastable Materials Science and Technology(MMST), Yanshan University, Qinhuangdao 066004, Hebei, China.
Langmuir. 2024 Aug 13;40(32):16900-16908. doi: 10.1021/acs.langmuir.4c01507. Epub 2024 Jul 29.
BiOCl photocatalyst with excellent performance has been prepared by a simple liquid-solid phase transition method. Three BiOCl-x (x = 0.5, 0.75, 1.0) photocatalysts were obtained by changing the amount of HCl in the preparation process. The main dominant crystal planes are (001), (002), and (003). Their forbidden bandwidths are reduced to 2.81, 2.89, and 2.84 eV. The samples were characterized by X-ray diffractometer, high-resolution field emission scanning electron microscopy, transmission electron microscopy, high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, Fourier infrared spectrometry, UV-vis diffuse reflection spectrometer, and UV-vis spectrophotometer. The degradation mechanism of BiOCl-x on Rhodamine B(RhB) has been investigated by quenching experiments on active materials. ·O was the primary degradation agent. When the dosage of HCl was 0.75 mL, the degradation effect of RhB was the best under the same experimental conditions. In visible light, RhB was almost completely degraded within 15 min, demonstrating an excellent photocatalytic degradation efficiency.
通过简单的液-固相变法制备了具有优异性能的BiOCl光催化剂。通过改变制备过程中HCl的用量，得到了三种BiOCl-x（x = 0.5、0.75、1.0）光催化剂。主要的优势晶面为（001）、（002）和（003）。它们的禁带宽度分别降低到2.81、2.89和2.84 eV。采用X射线衍射仪、高分辨率场发射扫描电子显微镜、透射电子显微镜、高分辨率透射电子显微镜、X射线光电子能谱、傅里叶红外光谱仪、紫外-可见漫反射光谱仪和紫外-可见分光光度计对样品进行了表征。通过对活性物质的猝灭实验研究了BiOCl-x对罗丹明B（RhB）的降解机理。·O是主要的降解剂。当HCl用量为0.75 mL时，在相同实验条件下RhB的降解效果最佳。在可见光下，RhB在15分钟内几乎完全降解，显示出优异的光催化降解效率。
