Abstract
The transformation of the dimensional structure of nanoflower-like GO-ZnO (GO-ZnO NFs) has been studied for sensitive detection of H2S. The dimensional structure of materials depends on several factors such as base concentration, surfactants as structure controlling agents, temperature, and reaction time of the hydrothermal process. Our study finds that changing nanostructure to 3-D can improve the surface area and enhance the H2S gas response at room temperature. H2S sensing performance test is carried out by determining resistance (Ro) during exposed gas molecules. The optimum composition of GO-ZnO NFs is found at a weight ratio of 1:1. Moreover, the prepared sensor exhibits excellent performance for monitoring H2S with a limit of detection (LOD) at 0.0051 (3σ) and regression linear at 0.9973. In addition, the prepared material shows selective H2S gas in the presence of other matrix gases. Therefore, the GO-ZnO NFs materials have the potential for analysis and monitoring of H2S in the environment.
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