Citation: JIANG Hong-Ji, MAO Bing-Xue. One-Pot Step Hydrothermal Synthesis of Nano-Composites Based on Graphene and CdSe Quantum Dots with Different Morphology[J]. Chinese Journal of Inorganic Chemistry, ;2013, 29(11): 2305-2314. doi: 10.3969/j.issn.1001-4861.2013.00.342 shu

One-Pot Step Hydrothermal Synthesis of Nano-Composites Based on Graphene and CdSe Quantum Dots with Different Morphology

1.
Key Laboratory for Organic Electronics and Information Displays, Institute of Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing 210023, China

Received Date: 6 March 2013
Available Online: 21 May 2013
Fund Project: 国家科技部重大基础研究计划(No.2009CB930600,2012CB933301) (No.2009CB930600,2012CB933301)“有机与生物光电子学”教育部创新团队(No.IRT1148) (No.IRT1148)

Graphene oxides and graphene by using redox method were synthesized and characterized. The properties of graphene obtained by chemical reduction method of NaBH₄ and thermal reduction method in ethylene amine solvent were further compared. It was demonstrated that thermal reduction of graphene oxides in ethylene amine solvent could introduce nitrogen functional groups to the surface of obtained graphene, increase the distance between the film layers and enhance its dispersity. The results demonstrated that graphene oxides were reduced, CdSe quantum dots were loaded simultaneously, and oxygen content as significantly decreased. The change of reaction temperature showed little effects on the reduction of graphene oxides, and longer the reaction time, higher the reduction rate of graphene oxides. With the increase of reaction time, the CdSe quantum dots loaded on the surface of graphene grew into nanorods, nanowires, and even branch-shaped nano structures. By controlling the reaction time and temperature, we can easily control the reduction level of graphene oxides and the morphology of CdSe quantum dots supported on the surface of graphene. In conclusion, an effective method is established to control the properties and morphology of nano-composites based on graphene and CdSe quantum dots by hydro-thermal methods.
- quantum dots;graphene;composite;hydro-thermal reduction;morphology
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