TY - JOUR
T1 - Photoluminescence of graphene quantum dots enhanced by microwave post-treatment
AU - Huang, Wentao
AU - Li, Xibing
AU - Sun, Xiaoyan
AU - Ding, Xifeng
AU - Feng, Yanjie
AU - Tang, Yinghua
AU - Zhou, Panpan
AU - Wang, Lixi
AU - Zhang, Qitu
N1 - Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2021/2/1
Y1 - 2021/2/1
N2 - 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.
AB - 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.
KW - Graphene quantum dots
KW - Layered double hydroxides
KW - Microwave
KW - Post-treatment
KW - Quantum yields
UR - http://www.scopus.com/inward/record.url?scp=85089841066&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2020.126714
DO - 10.1016/j.cej.2020.126714
M3 - 文章
AN - SCOPUS:85089841066
SN - 1385-8947
VL - 405
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
M1 - 126714
ER -