Single-step rapid synthesis of monolithic mesoporous carbon/graphene aerogels with improved double layer capacitance. (18th April 2018)

• Record Type: Journal Article
• Authors: Chandrasekaran, Naveen; Premkumar, Viji; Senthil Kumar, Sakkarapalayam Murugesan; Ram, Rahul
• Is Part Of: New journal of chemistry. Volume 42:Number 9(2018)
• Page Start: 7371
• Page End: 7376
• Publication Date: 2018-04-18
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/c7nj05077a
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : Graphene oxide is used as an acid catalyst for the gelation of a resorcinol–formaldehyde (R–F) network. Pyrolytic conversion of the GO/R–F network leads to the formation of graphene/mesoporous carbon network with enhanced specific capacitance. Abstract : Resorcinol (R)–formaldehyde (F) aerogels are a class of organic aerogels pursued for their conversion to carbon aerogels upon pyrolysis at higher temperatures under an inert atmosphere. RF aerogels can be prepared by either acid or base catalysed condensation of resorcinol and formaldehyde via electrophilic aromatic substitution. Recently, RF was used as an interconnect between graphene sheets to form three-dimensional assemblies of graphene aerogels. In this study, we have demonstrated a novel and facile approach to the gelation of an RF network by taking into account the possibility of deprotonation of oxygen functionalities present in graphene oxide (GO). The as-prepared RF/GO gels were carbonized to obtain mesoporous carbon (MC)/graphene (G) aerogels (MCGAs), which exhibit high specific surface area, increased electrical conductivity and specific capacitance on a par with reported graphene aerogels prepared by other synthetic routes.