Bicone-like ZnO structure as high-performance butanone sensor

Author(s)

Zito, Cecilia A. ^[1] ; Perfecto, Tarcisio M. ^[1] ; Oliveira, Tais N. T. ^[1] ; Volanti, Diogo P. ^[1]

Affiliation

^[1] Sao Paulo State Univ Unesp, Lab Mat Sustainabil LabMatSus, Ibilce, R Cristovao Colombo 2265, BR-15054000 Sao Jose Do Rio Preto, SP - Brazil

• Document type: Journal article
• Source: Materials Letters; v. 223, p. 142-145, JUL 15 2018.
• Web of Science Citations: 0

Abstract

Sensors based on metal oxide semiconductors have been widely applied for the detection of several volatile organic compounds (VOCs). However, the development of sensing materials with high selectivity, improved sensitivity, low detection limit is still a challenge. In this work, bicone-like ZnO structure was synthesized by a rapid template-free microwave-assisted hydrothermal method and then applied as VOC sensor. The VOC-sensing tests revealed that ZnO structure presented a higher response toward butanone than to other VOCs, such as benzene, toluene, m-xylene, acetone, ethanol, acetaldehyde, and isopropanol. Moreover, the ZnO-based sensor showed an enhanced butanone-sensing performance at 400 degrees C, including a response of 29.4-100 ppm of butanone, high sensitivity to detect low butanone concentration (2 ppm), and a low detection limit of 0.41 ppm. Therefore, the unique bicone-like ZnO structure might be a promising candidate for butanone sensors. (C) 2018 Elsevier B.V. All rights reserved. (AU)

• 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: 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: 16/04371-1 - Sensors based on reduced graphene oxide-WO3 and Ag-WO3 obtained by microwave-assisted ultrasonic spray and deposited on paper for detection of volatile organic compounds
• Grantee: Tarcísio Micheli Perfecto
• Support Opportunities: Scholarships in Brazil - Master
• FAPESP's process: 13/23886-4 - Study on selectivity of hydrogenolysis / reductive hydrogenation processes of sugarcane bagasse under supercritical state catalyzed by structured metal oxides
• Grantee: Mauricio Boscolo
• Support Opportunities: Program for Research on Bioenergy (BIOEN) - Regular Program Grants
• FAPESP's process: 16/22219-2 - Microwave-assisted hydrothermal synthesis of the zinc oxide decored with platinum nanoparticles for volatile organic compounds detection
• Grantee: Taís Nascimento Teixeira Oliveira
• Support Opportunities: Scholarships in Brazil - Scientific Initiation