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Rupturing C 60 Molecules into Graphene‐Oxide‐like Quantum Dots: Structure, Photoluminescence, and Catalytic Application
Author(s) -
Chen Guanxiong,
Zhuo Zhiwen,
Ni Kun,
Kim Na Yeon,
Zhao Yuan,
Chen Zongwei,
Xiang Bin,
Yang Lihua,
Zhang Qun,
Lee Zonghoon,
Wu Xiaojun,
Ruoff Rodney S.,
Zhu Yanwu
Publication year - 2015
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201501611
Subject(s) - photoluminescence , oxidizing agent , graphene , materials science , molecule , oxide , quantum yield , quantum dot , oxygen , catalysis , photochemistry , nanotechnology , chemistry , optoelectronics , organic chemistry , fluorescence , optics , physics , metallurgy
The large‐scale synthesis of graphene‐oxide‐like quantum dots (GOLQDs) is reported by oxidizing C 60 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 CC bonds in the C 60 molecule, followed by rupture of that CC 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.