封面图片
2019年, 第13卷 第5期
Production of sulfate radical via peroxymonosulfate (PMS) activation by carbon-based nanomaterials has emerged as a promising technology for organic pollutants degradation due to its excellent catalytic potential and environmentally benign properties. However, the electron-donating capability of current carbon materials, which is critical in PMS activation, is still limited. This article describes an UV-light assisted PMS activation system constructed over TiO2-CNT composite. Under the UV light irradiation, the photoinduced electrons generated from TiO2 could be continuously transferred to the CNT for the activation of PMS to improve the catalytic performance of organic pollutant degradation. Meanwhile, the separation of photoinduced electron-hole pairs could enhance the photocatalysis efficiency. The electron spin resonance spectroscopy and quenching experiments confirmed the generation of sulfate radical, hydroxyl radical and singlet oxygen in the system. Almost 100% phenol degradation was observed within 20 min, and the kinetic rate constant of the UV/PMS/20%CNT-TiO2 system (0.18 min-1) was 23.7 times that of the PMS/Co3O4 system under same conditions. [展开] ...
ISSN 2095-2201N (Print)
ISSN 2095-221X (Online)
CN 10-1013/X
Postal Subscription Code 80-973
原刊名 Frontiers of Environmental Science & Engineering in China 2018 Impact Factor: 3.883