Anchoring ceria nanoparticles on graphene oxide and their radical scavenge properties under gamma irradiation environment. Issue 25 (19th June 2017)

• Record Type: Journal Article
• Authors: Xia, Wei; Zhao, Jun; Wang, Tao; Song, Li; Gong, Hao; Guo, Hu; Gao, Bing; Fan, Xiaoli; He, Jianping
• Is Part Of: Physical chemistry chemical physics. Volume 19:Issue 25(2017)
• Page Start: 16785
• Page End: 16794
• Publication Date: 2017-06-19
• Subjects: Chemistry, Physical and theoretical -- Periodicals; 541.3
• DOI: 10.1039/c7cp02559a
• Languages: English
• ISSNs: 1463-9076

Abstract

Abstract : The working mechanism of CG for their radical scavenge properties in the epoxy resin during radiation environment. Abstract : 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 γ-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.