The synthesis of highly photoluminescent quantum yield (QY) nitrogen doped carbon quantum dots (N-CQDs) by hydrothermal carbonization from Anhydrous citric acid as the carbon source and trishydroxymethyl aminomethane (Tris) as the nitrogen source was studied.Based on a single factor test,the effects of variables including reaction temperature,reaction time,Tris weight and the interactions of two factors on QY were investigated.The morphology,surface functional groups and fluorescence characteristics of the N-CQDs were explored by HRTEM,FT-IR,UV-Vis and other analytical methods.The results revealed that the obtained optimum synthesized conditions for the parameters i.e.reaction temperature,reaction time,and Tris weight were 160℃,5h and 0.6g respectively,with QY up to 73.51%.The diameter distribution of N-CQDs was around 5～25nm,emitted blue-violet fluorescence under 365nm UV light.The surface of N-CQDs contained a large number of nitrogen-containing and oxygen-containing functional groups (such as —NH,CO,C—O,etc.).
Yang Jiliang, Jiang Qianqian, Yue Xiantian
. Preparation and characterization of highly photoluminescent quantum yield N-CQDs[J]. New Chemical Materials, 2021
, 49(12)
: 133
-136
.
DOI: 10.19817/j.cnki.issn 1006-3536.2021.12.027
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