Production of yellow-emitting carbon quantum dots from fullerene carbon soot

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• 作者：Qinghong Zhang 张庆红 ; Xiaofeng Sun 孙晓峰 ; Hong Ruan 阮红…
• 关键词：carbon quantum dots ; fullerene ; carbon soot ; photoluminescent ; top ; down
• 刊名：Science China Materials
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：60
• 期：2
• 页码：141-150
• 全文大小：2683KB
• 刊物类别：Materials Science, general; Chemistry/Food Science, general;
• 刊物主题：Materials Science, general; Chemistry/Food Science, general;
• 出版者：Science China Press
• ISSN：2199-4501
• 卷排序：60

文摘

Carbon quantum dots (CQDs) have emerged as a new generation of photoluminescent nanomaterials with wide applications. Among the various synthetic routes for CQDs, the acid-refluxingmethod, which belongs to the group of “top-down” methods, offers the advantage of large-scale production of CQDs and uses cheap and abundantly available starting materials. In this study, we evaluated the potential of fullerene carbon soot (FCS), a by-product obtained during the synthesis of fullerene, as the starting material for CQD production. It was found that FCS can be successfully converted to CQDs in high production yield in mixed acids, i.e., concentrated HNO₃ and H₂SO₄, under mild conditions. The fluorescence quantum yield (Φ) of the as-produced CQDs is in the range of 3%–5%, which is the highest value for CQDs obtained from “top-down” methods. Importantly, the CQDs prepared by this method show emission in the yellow range of the visible light, which is advantageous for their various potential applications. Further investigations reveal that the CQDs are highly photostable over a wide pH range and show good resistance against ionic strength and long-termUV irradiation. This further expands their potential use under harsh conditions.