Europium (III)‐modified sunflower‐derived carbon dots for fluorescent anti‐counterfeiting inks and photocatalysis

A highly water-soluble and fluorescent N,S-doped carbon dots/europium (N,S-CDs/Eu) was successfully synthesized via a secondary hydrothermal method. This involved surface modification of N,S-CDs derived from sunflower stem pith (SSP) with europium ions (Eu