Synthesis and gas-sensing properties of ZnO nanoflowers for hydrogen sulphide (H2S) detection

Herein, we report the synthesis, characterization, and gas sensing properties of zinc oxide (ZnO) nanoflowIP 203.8.109.20 O : Wed, 29 Mar 2023 13 52:50 Copyright: Ame ican Scientific Publ shers ers grown by facile simple solution process. The synthesized ZnO nanoflowers were examined by variD ivered by Ingenta ous techniques to explore their structural, morphological, optical, compositional and gas sensing properties. The details morphological and structural characterizations revealed that the synthesized material possessed flower-shaped morphologies in the nanoscale range with a wurtzite hexagonal crystal structure of ZnO. The high-intense peaks of the synthesized ZnO nanoflowers confirmed high crystallinity. Furthermore, the synthesized ZnO nanoflowers were used as an electrode material to fabricate a facile and low-cost gas sensor to detect hydrogen sulphide (H2S). At an ideal working temperature of 150 degrees C, the ZnO nanoflowers electrodebased gas sensor displayed remarkable selectivity, good response (48 s), and recovery (97 s) time. Moreover, the fabricated gas sensor exhibited a maximum gas response of 139 (Rg/Ra) towards 50 ppm hydrogen sulphide gas at 150 degrees C. The unique performance of the ZnO nanoflowers-based gas sensor was attributed to the large surface area of the ZnO nanoflowers, which enabled the fabricated sensor to be a contender for the detection of H2S gas among the wide variety of reported sensors.

Automated summary

In this study, ZnO nanoflowers were synthesized by a simple solution process and characterized for their gas sensing properties. The nanoflowers exhibited flower-shaped morphology with a wurtzite hexagonal crystal structure of ZnO. The fabricated gas sensor using ZnO nanoflowers as the electrode material displayed good response and recovery time towards H2S gas.