RAPID AND ENVIRONMENTALLY-FRIENDLY METHOD FOR PREPARING SINGLE-LAYER GRAPHENE OXIDE

摘要

Provided is a rapid and environmentally-friendly method for preparing a large amount of single-layer graphene oxide, comprising: 1) mixing, stirring and soaking graphite and a strong acid, adding a strong oxidant (ferrate) and a stabilizer, slowly heating and continuously stirring to oxidize and exfoliate graphite sheets; 2) performing centrifugal separation on the reaction liquid, removing the strong acid, slowly pouring the mud-like product into icy deionized water to dilute, leaving the same to stand, repeatedly washing the precipitate with diluted hydrochloric acid and deionized water, and obtaining single-layer graphene oxide by means of centrifugal separation. The method is simple, safe, and energy efficient, and does not use a polluting halogen or heavy metal oxidizing agent.