Preparation of Carbon Dots with Ultrahigh Fluorescence Quantum Yield Based on PET Waste.

ABSTRACT: Environmentally friendly polyethylene terephthalate-based carbon dots (PET-CDs) with ultrahigh fluorescence quantum yield were prepared with waste PET textiles as raw materials. First, oligomers were prepared from the reaction of waste PET textile and ethylene glycol by the microwave method. Then, the mixture without isolation and purification as well as pyromellitic acid and urea were adopted as precursors for the preparation of PET-CDs by the hydrothermal method. It was found that the as-prepared PET-CDs had a spherical structure with an average particle size of 2.8 nm. The carbon core of PET-CDs was a graphene-like structure doped with nitrogen atoms in the form of pyrrole nitrogen and the surface contained -NH₂, which is convenient for modification and functionalization with

SUBMITTER: Wu Y 

PROVIDER: S-EPMC9609083 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature