▎ 摘　　要

NOVELTY - Graphene preparing apparatus (A1) (10), comprises: high-pressure water pump (200); waterjet nozzle (100) for receiving the water and for generating a pulsed or cavitating waterjet; graphite supply vessel (300) having supply duct for supplying graphite powder; exfoliation chamber that has first and second inlets for receiving the waterjet and graphite powder respectively; outlet through which slurry is expelled from the exfoliation chamber; filtering unit (500) downstream of exfoliation chamber for separating graphene from the slurry; and graphene collection tank for collecting the graphene. USE - The graphene preparing apparatus is useful for exfoliating graphite (claimed). ADVANTAGE - The apparatus: utilized in method for generating large quantity of good quality graphene at low cost; and is eco-friendly. DETAILED DESCRIPTION - Graphene preparing apparatus (A1) (10), comprises: a high-pressure water pump (200) for generating a high-pressure flow of water; a waterjet nozzle (100) for receiving the water and for generating a pulsed or cavitating waterjet; a graphite supply vessel (300) having a supply duct for supplying graphite powder; an exfoliation chamber that has a first inlet for receiving the waterjet and a second inlet for receiving the graphite powder; an outlet through which a slurry is expelled from the exfoliation chamber; a filtering unit (500) downstream of the exfoliation chamber for separating graphene from the slurry; and a graphene collection tank for collecting the graphene. INDEPENDENT CLAIMS are also included for: (1) graphene preparing apparatus (A2) for exfoliating graphite, comprising a high-pressure water pump for generating a high-pressure flow of water, a pressure vessel for receiving the water and providing a graphite slurry, waterjet nozzle for receiving the graphite slurry into an exfoliation chamber incorporated within the waterjet nozzle and for exfoliating the graphite in the graphite slurry using a pulsed or cavitating waterjet generated by the waterjet nozzle, an outlet through which the graphite slurry is expelled from the waterjet nozzle, a filtering unit downstream of the waterjet for separating graphene from the slurry and a graphene collection tank for collecting the grapheme; and (2) exfoliating graphite to make graphene, comprises generating a high-pressure flow of water, generating a pulsed or cavitating waterjet using the high-pressure flow of water, supplying the graphite to an exfoliation chamber, and exfoliating the graphite in the exfoliation chamber using the pulsed or cavitating waterjet. DESCRIPTION OF DRAWING(S) - The figure shows a schematic diagram of a graphene preparing apparatus. Graphene preparing apparatus (10) Waterjet nozzle (100) High-pressure water pump (200) Graphite supply vessel (300) Filtering unit (500)