Highly Efficiency Fluorescent Probe for Mercury Ions Based on (N, S)‐Co‐Doped Carbon Dots

Abstract

This work demonstrates the preparation of (N, S)‐co‐doped fluorescent carbon dots (N, S‐CDs) for mercury ions (Hg2+) detection. This new fluorescent probe based on N, S‐CDs using dopamine hydrochloride (DA) and L‐cysteine (L‐Cys) as raw materials was reported for the first time. The resulting N, S‐CDs exhibited excellent specificity and selectivity towards Hg2+ and could distinguish them from 26 anions and cations, including Cd2+, Pb2+, and Cr2O72−. The sensor demonstrated high‐intensity fluorescence quenching at ∼457 nm under the Hg2+ presence and the ability to detect Hg2+ in the 0.05‐0.5 μM range with a 9.37 nM detection limit. The innovations of this work are to offer a method for rapid monitoring of Hg2+ in the environment, besides inventing a new fluorescent probe based on N, S‐CDs.

Arthrospira platensis as future food: a review on functional ingredients, bioactivities and application in the food industry

“…Sequence alignment indicated that phycobiliproteins may be the main source of the peptides. VTY and LGVP had stronger ACE inhibitory effects, which may be related to the presence of aromatic and hydrophobic amino acid residues in sequence (Zhang et al, 2022a). Chen et al (2020c) extracted peptides from A. platensis by enzymatic hydrolysis and ultrafiltration methods.…”