文摘
A thorough investigation of the oxidation mechanism of sp2–sp3 hybrid carbon materials is helpful for the morphological trimming of graphene. Here, porous graphene (PGN) was obtained via a free radical oxidation process. We further demonstrated the difference between traditional and free radical oxidation processes in sp2–sp3 hybrid carbon materials. The sp3 part of graphene oxide was oxidized first, and well-crystallized sp2 domains were reserved, which is different from the oxidation mechanism in a traditional approach. The obtained PGN shows excellent performance in the design of PGN-based detectable molecule separation or other biomedical applications.