High‐Performance All‐Fiber Triboelectric Nanogenerator Using MOF‐Derived PrCoO 3 ‐Gelatin Biodegradable Nanofibers for Acoustic Energy Harvesting and Real‐Time Noise Monitoring

ABSTRACT In this study, we demonstrate MOF‐derived PrCoO 3 perovskite‐embedded Gelatin nanofiber (PGNF) based all‐Fiber triboelectric nanogenerator (A‐TENG) for acousto‐electric energy harvesting and real‐time noise decibel alerting applications. The A‐TENG is fabricated using PGNF (incorporated with optimized 2 wt.% PrCoO3), which serves as the negative triboelectric layer, while poly (lactic acid) (PLA) serves as the positive triboelectric layer. MOF‐derived PrCoO 3 perovskite, which acts as functional filler, is synthesized via hydrothermal method. The formation of single‐phase orthorhombic perovskite structure in the Pnma space group is confirmed by x‐ray diffraction (XRD). Furthermore, the A‐TENG exhibits efficient acoustoelectric energy conversion, generating maximum peak‐to‐peak voltage (V P‐P ) of 45.25 V and a current of 1.46 µA. The peak power density of 12.79 µW/cm 2 is obtained at load resistance of 1 MΩ, with an acoustic sensitivity of 4.05 V Pa −1 . The acoustic sensor operates over a wide frequency range of 20–20 000 Hz and responds effectively to acoustic stimuli in the range of 80–110 dB. The fabricated A‐TENG device employs fully biodegradable materials for its active sensing layers, thereby improving its environmental sustainability. In addition, the device demonstrates practical applicability in a real‐time noise‐alerting system, highlighting its potential for efficient acoustic sensing and self‐powered environmental noise monitoring.