Preparation, characterization and photocatalytic properties of BiOBr/ZnO composites

• 来源期刊: 能源化学
• 年，卷（期）: 2017,（3）
• 页码范围: 416-421
• 页数: 6页
• 语种: 英文

摘要

BiOBr/ZnO composite photocatalysts were prepared by a simple hydrothermal method.The as-prepared samples were characterized by X-ray diffraction (XRD),scanning electron microscopy (SEM),transmission electron microscopy (TEM),high-resolution transmission electron microscopy (HRTEM),UV-Vis diffusion reflectance spectroscopy (DRS) and photoluminescence (PL) spectroscopy,respectively.The photocatalytic activities were evaluated by the degradation of methyl blue (MB) under the simulated sunlight irradiation.Among all the samples,the BiOBr/ZnO composite with a mole ratio of 3:1 (Bi:Zn) exhibited the best photocatalytic activity.The improvement of photocatalytic activity was mainly attributed to the low recombination ratio of photo-induced electron-hole pairs.The possible photocatalytic mechanism was discussed on the basis of the band structures of BiOBr and ZnO.