@Article{CL.2025.2212.1031,
AUTHOR = {Wenwen Zhang, Changgui Lei},
TITLE = {Bismuth Silver Sulfide (AgBiS<sub>2</sub>) Nanoparticle-Modified SPEs Enabling Concurrent Lead and Cadmium Analysis},
JOURNAL = {Chalcogenide Letters},
VOLUME = {22},
YEAR = {2025},
NUMBER = {12},
PAGES = {1031--1045},
URL = {http://www.techscience.com/CL/v22n12/65650},
ISSN = {1584-8663},
ABSTRACT = {The development of quick, accurate, and field-deployable detection techniques is required due to the growing environmental pollution caused by heavy metals, especially lead (Pb) and cadmium (Cd). In this work, bismuth
silver sulfide (AgBiS<sub>2</sub>) nanoparticles are synthesized using a simple hydrothermal method aided by biomolecules,
and they are used as a new modifier forPb(II) and Cd(II) simultaneous electrochemical detection using screen-printed
electrodes (SPEs). After thorough material characterisation, pure, highly crystalline, quasi-spherical AgBiS<sub>2</sub> nanoparticles produced with an average diameter of around 20 nm. The AgBiS<sub>2</sub>/SPE sensor demonstrated a threefold decrease in charge transfer resistance, indicating a considerable improvement in electrochemical performance. The sensor showed outstanding analytical performance under optimal SWASV, or square wave anodic stripping voltammetry
conditions, with broad linear ranges and low 0.21 µg/L for Pb(II) and 0.15 µg/L for Cd(II) are the detection limits, both of which are far below WHO recommendations. Along with demonstrating great selectivity, good repeatability,
and long-term stability,The sensor was successfully used to analyze real water samples, highlighting its promise
as an affordable and reliable instrument for on-site environmental monitoring. },
DOI = {10.15251/CL.2025.2212.1031}
}