CuO-decorated MOF derived ZnO polyhedral nanostructures for exceptional H2S gas detection. (March 2023)

• Record Type: Journal Article
• Authors: Hussain, Shahid; Okai Amu-Darko, Jesse Nii; Wang, Mingsong; Alothman, Asma A.; Ouladsmane, Mohamed; Aldossari, Samar A.; Khan, Muhammad Shahzeb; Qiao, Guanjun; Liu, Guiwu
• Is Part Of: Chemosphere. Volume 317(2023)
• Publication Date: 2023-03
• Subjects: CuO -- ZnO -- MOF -- Polyhedral -- H2S -- Gas sensors; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2023.137827
• Languages: English
• ISSNs: 0045-6535

Abstract

Abstract: Considering that H2 S is a hazardous gas that poses a significant risk to people's lives, research into H2 S gas sensors has garnered a lot of interest. This work reports a CuO/ZnO multifaceted nanostructures(NS) created by heat treating Cu 2+ /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 H2 S gas), quick response and recovery times (57/191s @20 ppm), a low limit of detection (1.6@500 ppb H2 S), good humidity resistance and highly selective towards H2 S 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 H2 S. Graphical abstract: Image 1 Highlights: Facile synthesis of multifaceted Cu 2+ /ZIF-8 nanostructures for efficient detection of H2 S gas with ultimate senor stability. High specific surface area, porosity and bi-metallic ions sustenance with polyhedral nanostructures. Heterojunction aided high selectivity and response of fabricated sensor towards reducing gas H2 S.