Akademik Veri Yönetim Sistemi
Microchemical Journal, cilt.224, 2026 (SCI-Expanded, Scopus)
A novel green strategy for fabricating Ag–ZnO nanocomposites using Cladonia rangiformis lichen extract is reported for the first time and applied to the sensitive electrochemical measurement of Remazol Brilliant Blue R (RBBR). The biogenic synthesis produced quasi-spherical, well-dispersed nanostructures with enhanced electron mobility and improved interfacial charge-transfer characteristics. Comprehensive physicochemical characterization using UV–Vis, FTIR, XRD, SEM/TEM, DLS, zeta potential, EDX, and TGA confirmed the successful formation and stability of the hybrid nanocomposite. The Cladonia-derived Ag–ZnO material was used to modify a pencil graphite electrode, yielding a highly responsive electrochemical sensor for Remazol Brilliant Blue R (RBBR). Compared with the bare electrode, significantly enhanced electron-transfer kinetics and a pronounced reduction in charge-transfer resistance were observed. Differential pulse voltammetry enabled ultrasensitive detection of RBBR with a low detection limit of 0.0059 μM and two wide linear dynamic ranges. Statistical evaluation demonstrated excellent precision, reproducibility, short-term signal stability, and strong resistance to interference from common ions. Real surface-water analysis yielded recoveries exceeding 98%, verifying the reliability and practical applicability of the proposed method. The combination of bio-enabled nanocomposite synthesis and high analytical performance highlights a new sustainable measurement platform for monitoring environmentally persistent dyes.