• 文献标题:   Anchoring ceria nanoparticles on graphene oxide and their radical scavenge properties under gamma irradiation environment
  • 文献类型:   Article
  • 作  者:   XIA W, ZHAO J, WANG T, SONG L, GONG H, GUO H, GAO B, FAN XL, HE JP
  • 作者关键词:  
  • 出版物名称:   PHYSICAL CHEMISTRY CHEMICAL PHYSICS
  • ISSN:   1463-9076 EI 1463-9084
  • 通讯作者地址:   Nanjing Univ Aeronaut Astronaut
  • 被引频次:   11
  • DOI:   10.1039/c7cp02559a
  • 出版年:   2017

▎ 摘  要

Polymer networks such as those of epoxy resin, as common protection materials, possess radiolytic oxidation degradation effects under gamma irradiation environment, which have a great accelerating effect on the ageing rate and severely limit their potential applications for metal protection in the nuclear industry. To overcome this, we report a simple scheme of anchoring crystalline ceria nanoparticles onto graphene sheets (CG) and incorporate it into the epoxy resin, followed by thermal polymerization to obtain CeO2/graphene-epoxy nanocomposite coating (CGNS). We had proven that graphene might act as "interwalls'' in the epoxy matrix, which will result in space location-obstruct effect as well as absorb the radicals induced by g-ray irradiation. Moreover, owing to the interconversion of cerium ions between their +3 and +4 states coupled with the formation of oxygen vacancy defects, electron spin resonance (ESR) detection shows that CeO2/graphene (CG) could act as a preferable radical scavenger and achieve better performance in trapping radicals than single graphene based composite. Electrochemical data strongly demonstrate that CeO2/graphene is capable of maintaining the anti-corrosion properties under gamma irradiation environment. Therefore, the designed hybrid CeO2/graphene-epoxy composite can be considered as potential candidates for protective coatings in nuclear industry.