Facile preparation of BiOCl x I1−x composites with enhanced visible-light photocatalytic activity
详细信息 查看全文
- 作者：Yifan Yang ; Feng Zhou ; Su Zhan ; Yujun Liu ; Yu Tian ; Qiuchen He
- 刊名：Applied Physics A
- 出版年：2017
- 出版时间：January 2017
- 年：2017
- 卷：123
- 期：1
- 全文大小：
- 刊物类别：Physics and Astronomy
- 刊物主题：Condensed Matter Physics; Optical and Electronic Materials; Nanotechnology; Characterization and Evaluation of Materials; Surfaces and Interfaces, Thin Films; Operating Procedures, Materials Treatment
- 出版者：Springer Berlin Heidelberg
- ISSN：1432-0630
- 卷排序：123
文摘
BiOClxI1−x composites demonstrating enhanced visible-light photodegradation activity were prepared via a hydrothermal method. The as-prepared samples were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, UV–Vis diffuse reflection spectroscopy, field emission scanning electron microscopy, fourier transform infrared spectroscopy, transmission electron microscopy, Brunauer–Emmett–Teller, and electrochemical impedance spectroscopy, to demonstrate the successful formation of heterojunction in BiOClxI1−x. When BiOI content was 50% (x = 0.5), BiOCl0.5I0.5 showed an absorption edge of up to 560 nm, a bandgap energy (Eg) of 2.21 eV, and an obvious red shift by approximately 190 nm compared with bare BiOCl. In contrast with pure BiOCl that shows nearly no photocatalytic activity, the BiOClxI1−x hybrid photocatalyst exhibited higher enhanced visible-light photocatalytic activity for photodegradation of methylene blue. The superior photocatalytic activity of this hybrid photocatalyst is attributed to the large surface areas and pore volume, good oxidizing power and light utilization, and modified band structure resulting from the presence of BiOClxI1−x heterostructure. This work could provide a facile method to obtain a BiOClxI1−x visible-light photocatalyst and to enhance the photocatalytic performance of the catalyst for practical application, because this photocatalyst is low cost and can be easily scaled up.