Photoluminescence of graphene quantum dots enhanced by microwave post-treatment

Wentao Huang, Xibing Li, Xiaoyan Sun, Xifeng Ding, Yanjie Feng, Yinghua Tang, Panpan Zhou, Lixi Wang, Qitu Zhang

科研成果: 期刊稿件文章同行评审

27 引用 (Scopus)

摘要

Graphene quantum dots (GQDs) have a great potential in sensors and bioimaging for their lower toxicity, perfect water solubility and bright luminescence. However, considerable efforts still need to devote to enhance the photoluminescence quantum yields (PLQYs) of GQDs. At first, high PLQYs are guaranteed by confined synthesizing GQDs/layered double hydroxides (LDHs) with well-defined structure. Followed by a convenient microwave post-treatment, PLQYs of GQDs are further improved from 21.0% to 34.6%. After microwave post-treatment, the integrity of π-conjugated system has been enhanced and non-radiative processes also have been reduced inside GQDs, which both confirmed to be responsible for the improvement of PL properties. This work may point out a new direction for enhancing the PLQYs of GQDs. Moreover, owing to the stability and well PL performance of GQDs/LDHs, it has a great potential application in the outdoor anti-counterfeiting inks.

源语言英语
文章编号126714
期刊Chemical Engineering Journal
405
DOI
出版状态已出版 - 1 2月 2021

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