Taking advantage of the rich carbon source of waste foam, N-doped carbon dots were prepared by calcining sodium lignosulfonate/melamine formaldehyde foam in one step, which shows preferential fluorescence detection for iron ions.
To detect and adsorb methylene blue (MB) from wastewater simultaneously, a solid fluorescent and absorbent material was designed by immobilizing attapulgite (ATP) on calcium alginate (CA) and reacting with carbon dots (CDs), then the CA/ATP-g-CDs gel fibers were prepared.
Productive preparation of N-doped carbon dots from sodium lignosulfonate/melamine formaldehyde foam and its fluorescence detection of trivalent iron ions