Highly efficient detection of ethanol by SnO2 nanoparticles-decored NiO nanocuboids

Author(s)

Perrone, Olavo M. ; Roveda Jr, Antonio C. ; de Moraes, Daniel A. ; Theodoro, Reinaldo dos Santos ; Volanti, Diogo P.

• Document type: Journal article
• Source: Materials Research Bulletin; v. 158, p. 8-pg., 2023-02-01.

Abstract

There is great interest in developing devices to detect gasses for the constant monitoring of environments and to ensure welfare. However, developing portable devices with low cost and low detection limits, good selectivity using abundant semiconducting metal oxides, and easy and fast synthesis is still challenging. In this sense, we present a high surface area sensor based on SnO2 nanoparticles (NPs) deposited on NiO nanocuboids (NCs), with high response to ethanol. We used the precipitation of Ni foam in oxalic acid, followed by a microwave-assisted solvothermal process in ethylene glycol, urea, and K2SnO3 center dot 3H(2)O; then, the SnO2 (NPs)-NiO (NCs) could be obtained through the calcination of the as-prepared precursor. Even after 20 cycles of operation, the developed heterostructure material's response to ethanol detection was found to be R-air/R-gas = 84 +/- 6 at its optimum temperature (350 degrees C), and it can exhibit better performance at lower temperatures compared to other materials. (AU)

• FAPESP's process: 19/11058-6 - Gas sensors based on carbon composites from the catalytic decomposition reaction of methane
• Grantee: Olavo Micali Perrone
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 20/06421-1 - Development of sensors derived from metal-organic frameworks to detect microbial volatile organic compounds
• Grantee: Diogo Paschoalini Volanti
• Support Opportunities: Regular Research Grants