Cambridge Enterprise Limited

Northeastern University

Ali Kamali

Derek Fray

A method of producing graphene sheets comprising the steps of, (a) forming a carbonaceous powder by electrochemical erosion of a graphite electrode in a molten salt comprising hydrogen ions, (b) recovering the resulting carbonaceous powder from the molten salt liquid, and (c) thermally treating the carbonaceous powder by heating the carbonaceous powder in a non-oxidising atmosphere to produce a thermally treated powder comprising graphene sheets.

Method of producing graphene

A method of producing diamonds comprises the steps of producing a carbonaceous powder comprising nano-structured carbonaceous material and a transition metal and thermally treating the powder. The carbonaceous powder is produced by electrochemical erosion of graphite in a molten salt, the transition metal being incorporated into the carbonaceous powder during the electrochemical erosion. The step of thermally treating the carbonaceous powder is carried out in a non-oxidising atmosphere at a temperature of between 350&#xb0; C. and 300&#xb0; C., at a pressure of lower than 1 GPa. The method allows diamond to be produced at low pressures and low temperatures.

Method for producing synthetic diamonds

A method of producing graphene sheets comprising the steps of, forming a carbonaceous powder by electrochemical erosion of a graphite electrode in a molten salt comprising hydrogen ions, recovering the resulting carbonaceous powder from the molten salt liquid, and thermally treating the carbonaceous powder by heating the carbonaceous powder in a non-oxidising atmosphere to produce a thermally treated powder comprising graphene sheets. The method allows high production rates of high purity graphene sheets.

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Cambridge, United Kingdom

Ali Kamali