Hydrothermal synthesis of two photoluminescent nitrogen-doped graphene quantum dots emitted green and khaki luminescence
作者： Xiaohua Zhu , Xiaoxi Zuo , Ruiping Hu , Xin Xiao , Yong Liang
DOI: 10.1016/J.MATCHEMPHYS.2014.06.043
关键词:
摘要: Abstract A simple and effective chemical synthesis of the photoluminescent nitrogen-doped graphene quantum dots (N-GQDs) biomaterial is reported. Using hydrothermal treatment oxide (GO) in presence hydrogen peroxide (H2O2) ammonia, N-GQDs are synthesized through H2O2 exfoliating GO into nanocrystals with lateral dimensions ammonia passivating generated active surface. Then, after a dialytic separation, two water-soluble average size about 2.1 nm/6.2 nm, which emit green/khaki luminescence exhibit excitation dependent/independent photoluminescence (PL) behaviors, obtained. In addition, it also demonstrated that these stable over broad pH range have upconversion PL property, showing this approach provides method to synthesize functional N-GQDs.
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