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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.)

Ethanol detection using composite based on reduced graphene oxide and CuO hierarchical structure under wet atmosphere

Full text
Author(s):
Modenes-Junior, Marco A. [1] ; Zito, Cecilia A. [1] ; Perfecto, Tarcisio M. [1] ; Volanti, Diogo P. [1]
Total Authors: 4
Affiliation:
[1] Sao Paulo State Univ Unesp, Lab Mat Sustainabil LabMatSus, R Cristavao Colombo 2265, BR-15054000 Sao Jose Do Rio Preto, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS; v. 248, SEP 2019.
Web of Science Citations: 0
Abstract

Semiconductor metal oxides have been used for detecting volatile organic compounds (VOCs). However, these materials present a poor performance in humidity. Here, we report the effect of reduced graphene oxide (RGO) on the ethanol-sensing of CuO under dry and in the relative humidity range of 36-90%. For this purpose, RGO-CuO composites and CuO were synthesized by a one-step microwave-assisted synthesis. The VOCs sensing were performed at the range of 150-350 degrees C to acetone, benzene, ethanol, methanol, and m-xylene. The RGO-CuO composites exhibited enhanced ethanol sensing when compared with pure CuO at the optimal operating temperature of 250 degrees C. In addition, the optimal RGO content resulted in an enhanced selectivity and high sensitivity compared to pure CuO. The enhanced ethanol sensing performance of RGO-CuO was attributed to the RGO/CuO heterojunction. Thus, the combination of RGO and p-type CuO semiconductor can be a promising for VOCs detection under wet conditions. (AU)

FAPESP's process: 17/01267-1 - Graphene acid-hollow metal oxides composites for gas sensor
Grantee:Diogo Paschoalini Volanti
Support type: 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 type: Scholarships in Brazil - Doctorate
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
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: 18/00033-0 - Sensing devices of volatile organic compounds based on ZnO hollow/p-type semiconductors heterostructures
Grantee:Tarcísio Micheli Perfecto
Support type: Scholarships in Brazil - Doctorate