TY - JOUR
T1 - Manipulation of 3D nanocarbon hybrids toward synthesis of N-doped graphene quantum dots with high photoluminescence quantum yield
AU - Xie, Ning
AU - Tan, Long
AU - Li, Hua Fei
AU - Hu, Hai Yan
AU - Wang, Chen
AU - Pan, Ming
AU - Wu, Fan
AU - Wu, Ping
AU - Wang, Xiao Di
AU - Zeng, Zheling
AU - Deng, Shuguang
AU - Dai, Gui Ping
N1 - Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2020/3
Y1 - 2020/3
N2 - Synthesis of heteroatom-doped graphene quantum dots (GQDs) via a top-down approach is still challenging. Herein, we conveniently synthesized nitrogen-doped GQDs (N-GQDs) via an electrochemical method. In that, the N-containing 3D nanocarbon hybrids were prepared as the carbon and nitrogen sources, which were cut into small fragments in ammonia solution as the electrolyte. Interestingly, N-atoms from the 3D nanocarbon hybrids were successfully retained or converted into other types of N in the obtained GQDs, resulting to a highly doped N content up to 12.3% even after excluding the amino- and pyrrolic N at edges of the N-GQDs. As a matter of fact, the synthesized N-GQDs showed highly crystallized structure, and demonstrated a high photoluminescence quantum yield of ∼19.3%, among the highest values of top-down approach synthesized GQDs. Moreover, it can be also used for adjusting the absorption range of GQDs. Overall, we developed a new strategy to synthesize N-doped GQDs by controlling the carbon source, which opens a new avenue toward achieving other types of heteroatom-doped GQDs.
AB - Synthesis of heteroatom-doped graphene quantum dots (GQDs) via a top-down approach is still challenging. Herein, we conveniently synthesized nitrogen-doped GQDs (N-GQDs) via an electrochemical method. In that, the N-containing 3D nanocarbon hybrids were prepared as the carbon and nitrogen sources, which were cut into small fragments in ammonia solution as the electrolyte. Interestingly, N-atoms from the 3D nanocarbon hybrids were successfully retained or converted into other types of N in the obtained GQDs, resulting to a highly doped N content up to 12.3% even after excluding the amino- and pyrrolic N at edges of the N-GQDs. As a matter of fact, the synthesized N-GQDs showed highly crystallized structure, and demonstrated a high photoluminescence quantum yield of ∼19.3%, among the highest values of top-down approach synthesized GQDs. Moreover, it can be also used for adjusting the absorption range of GQDs. Overall, we developed a new strategy to synthesize N-doped GQDs by controlling the carbon source, which opens a new avenue toward achieving other types of heteroatom-doped GQDs.
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U2 - 10.1016/j.jlumin.2019.116827
DO - 10.1016/j.jlumin.2019.116827
M3 - Article
AN - SCOPUS:85076247845
SN - 0022-2313
VL - 219
JO - Journal of Luminescence
JF - Journal of Luminescence
M1 - 116827
ER -