Issue 20, 2022

An eco-friendly gelatin based triboelectric nanogenerator for a self-powered PANI nanorod/NiCo2O4 nanosphere ammonia gas sensor

Abstract

It is of great significance to develop low-cost, eco-friendly backup power sources for driving gas sensors. In this work, a gas sensor based on the PANI/NiCo2O4 composite was driven by a gelatin-polyimide based triboelectric nanogenerator (GP-TENG) for the detection of NH3 at room temperature. Nanostructured gelatin films prepared with abrasive paper as the template dramatically enhanced the output performance of the GP-TENG and showed excellent degradability in water. The peak-to-peak voltage of the GP-TENG could reach 400 V, and the output power could reach 6.16 mW. The GP-TENG could not only drive low-powered electronic devices such as LEDs and calculators, but also could perform motion detection, such as finger touch, elbow bending, etc. A circuit module of rectification and voltage regulation was designed to convert AC voltage from the GP-TENG into stable 24 V DC voltage, which could provide constant voltage input for the gas sensor. The GP-TENG, the circuit module of rectification and voltage regulation, and the PANI/NiCo2O4 gas sensor were integrated to construct a GP-TENG-driven ammonia gas sensor (GPAS). The GPAS exhibits excellent response (Vg/Va = 467%@20 ppm) towards NH3 sensing, and also shows good repeatability, selectivity and long-term stability. This work provides an eco-friendly and economical solution to fabricate a reliable backup power source to achieve self-powered function for NH3 gas sensors, which paves the way for the construction of a “smart factory” in the future.

Graphical abstract: An eco-friendly gelatin based triboelectric nanogenerator for a self-powered PANI nanorod/NiCo2O4 nanosphere ammonia gas sensor

Supplementary files

Article information

Article type
Paper
Submitted
07 mars 2022
Accepted
08 avr. 2022
First published
08 avr. 2022

J. Mater. Chem. A, 2022,10, 10935-10949

An eco-friendly gelatin based triboelectric nanogenerator for a self-powered PANI nanorod/NiCo2O4 nanosphere ammonia gas sensor

D. Zhang, Y. Yang, Z. Xu, D. Wang and C. Du, J. Mater. Chem. A, 2022, 10, 10935 DOI: 10.1039/D2TA01788A

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