Assessing the ozone-sensing capabilities of porous ZnO nanostructures fabricated via microwave-assisted hydrothermal synthesis

Author(s)

Komorizono, Amanda A. ; Tagliaferro, Julia C. ; Mastelaro, Valmor R.

• Document type: Journal article
• Source: Materials Letters; v. 388, p. 4-pg., 2025-03-05.

Abstract

Porous ZnO nanostructures were synthesized using a microwave-assisted hydrothermal method, followed by calcination to induce pore formation by removing the urea used during synthesis. After microwave synthesis, field-emission scanning electron microscopy (FESEM) images confirmed the formation of ZnO flowers and plates, with pores generated in the flower petals and plates following calcination. The porous ZnO sensor demonstrated the ability to detect low concentrations of O3 and exhibited relatively low response and recovery times. Additionally, the porous ZnO sensor was exposed to four gases (O3, NO2, NH3, and CO), showing a high selectivity for O3. (AU)

• FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
• Grantee: Elson Longo da Silva
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC
• FAPESP's process: 22/03325-7 - Development of flexible gas sensors based on rGO and rGO/ZnO conductive inks for detection of NO2 and NH3
• Grantee: Amanda Akemy Komorizono
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 19/22076-5 - Reduced graphene (rGO) and metal semiconductor oxides (MOS) nanocomposites for application as toxic gas sensors
• Grantee: Valmor Roberto Mastelaro
• Support Opportunities: Regular Research Grants