publication . Article . 2014

Synthesis of graphene nanoplatelets from peroxosulfate graphite intercalation compounds

MELEZHYK A.V.; TKACHEV A.G.;
Open Access Russian
  • Published: 01 Jan 2014 Journal: Наносистемы: физика, химия, математика (issn: 2220-8054, eissn: 2305-7971, Copyright policy)
  • Publisher: Федеральное государственное автономное образовательное учреждение высшего образования «Санкт-Петербургский национальный исследовательский университет информационных технологий, механики и оптики»
Abstract
Ultrasonic exfoliation of expanded graphite compound obtained by cold expansion of graphite intercalated with peroxodisulfuric acid was shown to allow the creation of graphene nanoplatelets with thickness of about 5-10 nm. The resulting graphene material contained surface oxide groups. The expanded graphite intercalation compound was exfoliated by ultrasound much easier than thermally expanded graphite. A mechanism for the cleavage of graphite to graphene nanoplatelets is proposed. It includes: (1) formation of ionic graphite compound intercalated with peroxodisulfate anions; (2) decomposition of intercalated peroxodisulfate anions with formation of active free ...
Subjects
free text keywords: GRAPHENE,GRAPHENE NANOPLATELETS,PEROXODISULFURIC ACID,GRAPHITE INTERCALATION COMPOUNDS,COLD EXPANSION
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