期刊
RSC ADVANCES
卷 7, 期 84, 页码 53643-53652出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ra10505c
关键词
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资金
- National Natural Science Foundation of China [61705063, 21203058, 61275117]
- Natural Science Foundation of Heilongjiang Province of China [QC2016013, B201308]
- Foundation of Educational Commission of Heilongjiang Province of China [12531579]
- Innovative Talents Program of Heilongjiang University of Science and Technology [Q20130202]
Rational regulation of localized sp(2)/sp(3) hybrid carbon structure in graphene oxide systems plays a very important role in developing advanced carbon-based hybrid materials. Here, we report a simple ethanol solvothermal method toward precise control of the growth of the sp(2) hybrid carbon configurations/clusters in the sp(3) carbon matrix so as to regulate the structure of electronic energy bands in the graphene oxide system. The results of morphology observation, XPS, solid-state C-13 MAS NMR, FT-IR and Raman spectroscopy proved that controllable generation of the sp(2) hybrid carbon configurations/clusters can be achieved based on an executive oxidation/reduction strategy. Upon excitation by a 532 nm laser with 4 ns pulses, the obtained reduced graphene oxide (160-rGO-6) with a large number of sp(2) hybrid carbon configurations displays greater nonlinear reverse saturable absorption response and a higher nonlinear absorption coefficient b of 560 cm GW(-1) than graphene oxide with different oxidation degree (GO-X, X = 6, 8, 10 and 12), and reduced graphene oxide with relatively few sp(2) hybrid carbon configuration ratios (Y-rGO-6, Y = 80, 100, 120, 140 and 180). The significantly enhanced nonlinear reverse saturable absorption of 160-rGO-6 is attributed to the two photon absorption and excited state absorption originating from the sp(2) hybrid carbon configuration system.
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