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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Impact of reduced graphene oxide on the ethanol sensing performance of hollow SnO2 nanoparticles under humid atmosphere

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Author(s):
Zito, Cecilia A. ; Perfecto, Tarcisio M. ; Volanti, Diogo P.
Total Authors: 3
Document type: Journal article
Source: SENSORS AND ACTUATORS B-CHEMICAL; v. 244, p. 466-474, JUN 2017.
Web of Science Citations: 48
Abstract

The interference of humidity is a key factor to be considered in metal oxide semiconductors gas sensing performance. However, an efficient gas detection under humid conditions is a challenge. Herein, we report the effect of reduced graphene oxide (RGO) on volatile organic compounds (VOCs) sensing performance of hollow SnO2 nanoparticles (NPs) under wet atmosphere. For this purpose, RGO-SnO2 nanocomposite was obtained by a one-pot microwave-assisted solvothermal synthesis. The sensing tests for VOCs were conducted under dry air and at a relative humidity (RH) between 24 and 98%. The samples exhibited better response toward ethanol than to other VOCs such as acetone, benzene, methanol, m-xylene, and toluene, at the optimum operating temperature of 300 degrees C. Furthermore, RGO-SnO2 nanocomposite showed an enhanced ethanol response in comparison with pure hollow SnO2 NPs. Even under 98% of RH, the RGO-SnO2 nanocomposite showed a response of 43.0 toward 100 ppm of ethanol with a response time of 8 s. The excellent sensor performance is related to the hollow structure of SnO2 NPs, and the heterojunction between RGO and SnO2. Therefore, the RGO content can be a promising approach to minimize the humidity effect on SnO2 ethanol sensing performance. (C) 2017 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 14/17343-0 - Effect of metal catalysts or reduced graphene oxide on metal oxides semiconductors for detection of volatile organic compounds
Grantee:Diogo Paschoalini Volanti
Support type: Regular Research Grants
FAPESP's process: 15/05916-9 - Synergy between Pd-SnO2 or reduced graphene oxide-SnO2 for volatile organic compounds detection in humidity
Grantee:Cecilia de Almeida Zito
Support type: Scholarships in Brazil - Master
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 type: 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 type: Program for Research on Bioenergy (BIOEN) - Regular Program Grants