材料科学
罗丹明B
可见光谱
X射线光电子能谱
扫描电子显微镜
漫反射红外傅里叶变换
光致发光
三元运算
光催化
煅烧
化学工程
光电子学
光化学
化学
催化作用
复合材料
有机化学
计算机科学
工程类
程序设计语言
作者
Jun Feng,Tao Jiang,Yingchun Han,Otieno Kevin Okoth,Long Cheng,Jingdong Zhang
标识
DOI:10.1016/j.apsusc.2019.144632
摘要
A dual Z-scheme Bi2S3/Bi2O3/WO3 ternary film was constructed via a controllable reduction of peroxotungstate by ethanol, calcination of Bi (NO3)3 and in situ anion exchange of Bi2O3 with sulfide. The as-prepared composite film was characterized by scanning electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. The UV–visible diffuse reflectance spectroscopic and photoluminescence studies indicated that the introduction of Bi2S3 in Bi2O3/WO3 film effectively improved the absorption of the film in the visible region and suppressed the recombination of photogenerated carriers. The photoelectrocatalytic activity of the Bi2S3/Bi2O3/WO3 film was evaluated by decoloration of Rhodamine B under visible light illumination. Compared with WO3 and Bi2O3/WO3 films, the Bi2S3/Bi2O3/WO3 film exhibited much higher degradation efficiency. Moreover, the enhanced visible light photoelectrocatalytic activity of the Bi2S3/Bi2O3/WO3 film was also demonstrated by efficient degradation of diclofenac. According to the reactive oxygen species detected by electron spin resonance, a dual Z-scheme system formed in the Bi2S3/Bi2O3/WO3 film was proposed, which offered a new approach to the construction of semiconducting composite film with high photoelectrocatalytic performance for pollutant removal.
科研通智能强力驱动
Strongly Powered by AbleSci AI