| Full text | |
| 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 |