Abstract

 The large‐scale synthesis of graphene‐oxide‐like quantum dots (GOLQDs) is reported by oxidizing C₆₀ molecules using a modified Hummers method with a yield of ≈25 wt% readily achieved. The GOLQDs are highly soluble in water and in addition to hexagons have other carbon rings in the structure. They have an average height of ≈1.2 nm and a diameter distribution of 0.6–2.2 nm after drying on substrates. First‐principle calculations indicate that a possible rupturing route may include the insertion of oxygen atoms to C-C bonds in the C₆₀ molecule, followed by rupture of that C-C bonds. The GOLQD suspension has a strong photoluminescence (PL) with peak position dependent on excitation wavelength. The PL is related to the size and emissive traps caused by oxygen‐containing groups. The GOLQDs also catalyze the oxidation of benzyl alcohol with a high selectivity.