Enhanced butanone chemoresistive sensor utilizing cobalt oxide nanoparticles

Author(s)

Zito, Cecilia A. ; Theodoro, Reinaldo S. ; Perfecto, Tarcisio M. ; de Sa, Bruna S. ; Vioto, Gabriel C. N. ; Volanti, Diogo P.

• Document type: Journal article
• Source: CERAMICS INTERNATIONAL; v. 50, n. 15, p. 7-pg., 2024-06-05.

Abstract

Detection of volatile organic compounds (VOCs), particularly 2-butanone, has become crucial due to their widespread use and associated risks to human health. In this study, we present a novel synthesis method for spinel Co 3 O 4 nanoparticles (NPs) employing a microwave-assisted hydrothermal approach followed by calcination and investigate their efficiency in VOC sensing applications. The Co 3 O 4 NPs exhibit remarkable sensitivity and selectivity towards butanone at relatively low operating temperatures. VOC-sensing experiments reveal an optimal operating temperature of 250 degrees C , showcasing an advantage over existing sensors. Notably, the sensor exhibits high selectivity for butanone, with signal values 1.6 -4.5 times higher than those for other VOCs, including acetaldehyde, ethanol, isopropanol, methanol, acetone, m-xylene, toluene, and benzene. Additionally, the Co 3 O 4 NPs-based sensor demonstrates high sensitivity, detecting concentrations as low as 5 ppm of butanone, with fast response/recovery times of 41/86 s for 200 ppm of butanone and robust long-term stability. These findings underscore the potential of Co 3 O 4 NPs as promising candidates for low-temperature butanone detection, which is essential for environmental and human health monitoring purposes. (AU)

• FAPESP's process: 18/08271-7 - Structural, electronic, and chemical characterization of graphene acid composites with yolk-shell CeO2 and yolk-shell Pd-CeO2 nanospheres
• Grantee: Cecilia de Almeida Zito
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• FAPESP's process: 20/02471-4 - Valorization of sugar cane fusel oil by catalytic partial dehydrogenation
• Grantee: Mauricio Boscolo
• Support Opportunities: Regular Research Grants
• FAPESP's process: 18/01258-5 - Novel chemical catalytic and photocatalytic processes for the direct conversion of methane and CO2 to products
• Grantee: José Maria Correa Bueno
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 17/01267-1 - Graphene acid-hollow metal oxides composites for gas sensor
• Grantee: Diogo Paschoalini Volanti
• Support Opportunities: Regular Research Grants
• FAPESP's process: 18/00033-0 - Sensing devices of volatile organic compounds based on ZnO hollow/p-type semiconductors heterostructures
• Grantee: Tarcísio Micheli Perfecto
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 16/25267-8 - Graphene acid composites with hollow CeO2 and Pd-CeO2 yolk-shell structures applied as volatile organic compounds sensors
• Grantee: Cecilia de Almeida Zito
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 20/05233-7 - Advanced composites based on semiconductor metal oxide and carbon structures for volatile organic compounds sensing
• Grantee: Bruna Soares de Sa
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
• 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
• FAPESP's process: 22/05381-1 - ZnO/NiO-type heterostructures derived from metal-organic frameworks for the detection of microbial volatile organic compounds
• Grantee: Reinaldo dos Santos Theodoro
• Support Opportunities: Scholarships in Brazil - Doctorate