国家/地区 韩国（3） 美国（3）
IPC部 B（3）
IPC大类 B01（3）
IPC小类 B01D（3）
IPC C01B031/02（2）
发明人
公开年 2012（2）
申请年 2011（2） 
专利权人 KOREA INST SCI TECHNOLOGY（3）

Making porous graphene membrane comprises oxidizing surface of multilayer graphene, reducing oxidized surface to carry out reductive etching, and repeatedly performing series of the above steps twice until nanopores are formed in graphene.

JHON Y M, JHON Y I, LEE S, YOUNG I J, IN J Y

Graphene-iron oxide complex, useful in purification filter for removal of heavy metals, comprises graphene and needle-like iron oxide nanoparticles grown on surface of the graphene.

KOO H Y, CHOI W S, KIM J K, YEONG G H, SAN CHOI W, GYEONG K J

Ball-milled graphene nano-powder or ribbon purifying method, involves separating magnetic impurities during stirring suspension using magnet, where impurities are incorporated into graphene powder during ball-milling.

LEE J K, LEE K, LEE K I, GAP L J, IL L G