We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Synthesis of Graphene Quantum Dots by a Simple Hydrothermal Route Using Graphite Recycled from Spent Li-Ion Batteries.
- Authors
Darabian, Lyane M.; Costa, Tainara L. G.; Cipriano, Daniel F.; Cremasco, Carlos W.; Schettino Jr., Miguel A.; Freitas, Jair C. C.
- Abstract
Graphene quantum dots (GQDs) are nanosized systems that combine beneficial properties typical of graphenic materials (such as chemical stability, biocompatibility and ease of preparation from low-cost precursors) with remarkable photoluminescent features. GQDs are well-known for their low cytotoxicity and for being promising candidates in applications, such as bioimaging, optoelectronics, electrochemical energy storage, sensing and catalysis, among others. This work describes a simple and low-cost synthesis of GQDs, starting from an alcoholic aqueous suspension of graphene oxide (GO) and using a hydrothermal route. GO was prepared using graphite recycled from spent Li-ion batteries, via a modified Hummers method. The GO suspension was submitted to hydrothermal treatments at different temperatures using a homemade hydrothermal reactor that allows the control of the heating program and the assessment of the internal pressure generated in the reaction. The synthesized GQDs exhibited bright blue/green luminescence under UV light; showing the success of the chosen route and opening the way for future applications of these materials in the field of optoelectronic devices.
- Subjects
QUANTUM dot synthesis; LITHIUM-ion batteries; GRAPHITE; QUANTUM dots; HEATING control; BIOMASS liquefaction
- Publication
C, 2022, Vol 8, Issue 4, p48
- ISSN
2311-5629
- Publication type
Article
- DOI
10.3390/c8040048