Cargando…

Bismuth Nanoclusters/Porous Carbon Composite: A Facile Ratiometric Electrochemical Sensing Platform for Pb(2+) Detection with High Sensitivity and Selectivity

[Image: see text] In this work, a ratiometric electrochemical sensor was constructed for the detection of Pb(2+) based on a bismuth nanocluster-anchored porous activated biochar (BiNCs@AB) composite. BiNCs with loose structure and AB with abundant oxygen-containing functional groups are favorable fo...

Descripción completa

Detalles Bibliográficos
Autores principales: Zou, Jin, Yu, Qi, Gao, Yansha, Chen, Shangxing, Huang, Xigen, Hu, Dongnan, Liu, Shuwu, Lu, Li-Min
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2021
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8757362/
https://www.ncbi.nlm.nih.gov/pubmed/35036776
http://dx.doi.org/10.1021/acsomega.1c05713
Descripción
Sumario:[Image: see text] In this work, a ratiometric electrochemical sensor was constructed for the detection of Pb(2+) based on a bismuth nanocluster-anchored porous activated biochar (BiNCs@AB) composite. BiNCs with loose structure and AB with abundant oxygen-containing functional groups are favorable for Pb(2+) adsorption and preconcentration; meanwhile, porous AB provides more mass transfer pathways and increases electronic and ion diffusion coefficients, realizing high sensitivity for Pb(2+) detection. At the same time, BiNCs were proposed as an inner reference for ratiometric electrochemical detection, which could greatly enhance the determination accuracy. Under optimized experimental conditions, the anodic peak current ratio between Pb(2+) and BiNCs exhibited a good linear relationship with the concentration from 3.0 ng/L to 1.0 mg/L. The detection limit can be detected down to 1.0 ng/L. Furthermore, the proposed sensor demonstrated good reproducibility, stability, and interference resistance, as well as satisfactory recoveries for the detection of Pb(2+) in real samples.