| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 145454 | Chemical Engineering Journal | 2016 | 8 Pages |
Abstract
•The highly fluorescent PEI-GQDs are synthesized from coffee grounds.•The PEI-GQDs exhibit enhanced band-edge photoluminescence property.•The PEI-GQDs serve as low-cytotoxicity biological imaging agents.•The PEI-GQDs show high selectivity for detecting Fe3+ and Cu2+.
We have developed a novel eco-friendly approach involving hydrazine hydrate-assisted hydrothermal cutting followed by functionalization with poly (ethylene imine) (PEI) for fabricating highly fluorescent graphene quantum dots from coffee grounds. The PEI-functionalized graphene quantum dots exhibit enhanced band-edge photoluminescence with single exponential decay. Their preliminary applications in bioimaging and sensing of heavy metals have been demonstrated.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Liang Wang, Weitao Li, Bin Wu, Zhen Li, Shilong Wang, Yuan Liu, Dengyu Pan, Minghong Wu,