CuO-decorated MOF derived ZnO polyhedral nanostructures for exceptional H2S gas detection

• DOI: 10.1016/j.chemosphere.2023.137827
• Publication Date: 2023-01-13T07:47:03Z
• Authors: Shahid Hussain; Jesse Nii Okai Am...; Mingsong Wang; Asma A. Alothman; Mohamed Ouladsmane; Samar A. Aldossari; Muhammad Shahzeb ...; Guanjun Qiao; Guiwu Liu
• Keywords: Gaseous diffusion

Considering that H2S is a hazardous gas that poses a significant risk to people's lives, research into H2S gas sensors has garnered a lot of interest. This work reports a CuO/ZnO multifaceted nanostructures(NS) created by heat treating Cu2+/ZIF-8 impregnation precursors, and their microstructure and gas sensing characteristics were examined using various characterization techniques (XRD, XPS, SEM, TEM, and BET). The as-prepared hollow CuO/ZnO multifunctional nanostructures had a high gas response value (425@50 ppm H2S gas), quick response and recovery times (57/191s @20 ppm), a low limit of detection (1.6@500 ppb H2S), good humidity resistance and highly selective towards H2S gas. The hollow CuO/ZnO multifaceted nanostructures possessed enhanced gas sensing capabilities which may be related to their porous hollow nanostructures, the manufactured p-CuO/n-ZnO heterojunctions, and the spillover effect between CuO and H2S.