期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 262, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2019.118250
关键词
Ca-doped; alpha-Fe2O3; Peroxymonosulfate; DFT calculations; Oxygen vacancy
资金
- National Natural Science Foundation of China [51604194]
- Natural Science Foundation of Hubei Province of China [2016CFB169]
- Youths Science Foundation of Wuhan Institute of Technology [k201609]
- China Scholarship Council [201808420137]
- Nanyang Environment and Water Research Institute (Core Fund), Nanyang Technological University, Singapore
In this work, a cost-effective and eco-friendly calcium-doped alpha-Fe2O3 (Ca-Fe2O3) with abundant oxygen vacancies was fabricated using a scalable precipitation-calcination method to activate peroxymonosulfate (PMS) for wastewater purification. Density functional theory calculations revealed that the incorporation of Ca2+ into the alpha-Fe2O3 structure enhances the electron transfer from alpha-Fe2O3 to PMS, facilitating the activation of PMS. The degradation of Rhodamine B by 5%Ca-Fe2O3 proceeded with a reaction constant 8 times higher than that of pristine alpha-Fe2O3. This can be attributed to the increased generation of O-1(2) and O-2(center dot-), increased specific surface area and enhanced electrical conductivity. The applicability of the 5%Ca-Fe2O3/PMS system was investigated including its operating parameters and stability, and the intermediates involved in the reaction were identified. The 5%Ca-Fe2O3/PMS system exhibited excellent degradation efficiency in natural water samples. This work opens up new perspectives for designing highly efficient catalysts and renders iron oxides potential candidates for environmental remediation.
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