期刊
MATERIALS
卷 10, 期 10, 页码 -出版社
MDPI AG
DOI: 10.3390/ma10101118
关键词
BiFeO3; oxygen vacancies; photocatalysis
类别
资金
- National Natural Science Foundation of China [51662027, 51602170]
- Natural Science Foundation of Qinghai, China [2016-ZJ-954Q]
- ChunHui Program of Ministry of Education of China [Z2016074, Z2016075]
- Youth Science Foundation of Qinghai Normal University [15ZR07]
In this work, oxygen vacancies were introduced onto the surface of BiFeO3 nanoparticles by NaBH4 reduction method to yield oxygen-deficient BiFeO3-x samples. Comprehensive analysis on the basis of high-resolution transmission electron microscopy (HRTEM) observation and X-ray photoelectron spectrum (XPS) confirms the existence of surface oxygen vacancies on the BiFeO3-x nanoparticles. The photocatalytic activity of as-prepared BiFeO3-x samples was evaluated by the decolorization of rhodamine B (RhB) under simulated sunlight irradiation. The experimental results indicate that the photocatalytic activity of samples is highly related to the NaBH4 reduction time, and the BiFeO3-x sample reduced for 40 min exhibits the highest photocatalytic efficiency, which is much higher than that of pristine BiFeO3 nanoparticles. This can be explained by the fact that the surface oxygen vacancies act as photoinduced charges acceptors and adsorption sites suppress the recombination of photogenerated charges, leading to an increasing availability of photogenerated electrons and holes for photocatalytic reaction. In addition, the obtained BiFeO3-x sample exhibits good photocatalytic reusability.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据