Enhanced photocatalytic performance of direct Z-scheme BiOCl–g-C3N4 photocatalysts

作者：Yang Bai, Pingquan Wang, Jianyi Liu, Xiangjun Liu · 发表于：RSC Advances · 年份：2014 · DOI：10.1039/c4ra01629g · 被引用次数：173 · 研究领域：Advanced Photocatalysis Techniques、Gas Sensing Nanomaterials and Sensors、Covalent Organic Framework Applications

Novel BiOCl–g-C3N4 composite photocatalysts were synthesized by a one-step chemical bath method. The composites were characterized using X-ray diffraction (XRD), high-resolution transmission microscopy (HRTEM), UV-visible light diffusion reflectance spectrometry (DRS), Fourier-transform infrared spectroscopy (FT-IR), and photoluminescence spectroscopy (PL). The results indicated that BiOCl was dispersed on g-C3N4 to form heterojunction structures with high specific surface areas. BiOCl–g-C3N4 showed higher photocatalytic activity than pure g-C3N4 and BiOCl for rhodamine B (RhB) degradation. The enhanced performance was induced by the high separation efficiency of photoinduced carriers. The active species trapping and quantification experiments indicated that the photoinduced charges transfer via a direct Z-scheme.