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

[Display omitted] •RGO-CuO composite was obtained by a one-pot microwave-assisted hydrothermal method.•RGO-CuO composite could be used for ethanol detection under high humid conditions.•The enhanced ethanol response can be attributed to the RGO/CuO interface. Semiconductor metal oxides have been use...

Full description

Saved in:
Bibliographic Details
Published in:Materials science & engineering. B, Solid-state materials for advanced technology Solid-state materials for advanced technology, 2019-09, Vol.248, p.114385, Article 114385
Main Authors: Modenes-Junior, Marco A., Zito, Cecilia A., Perfecto, Tarcísio M., Volanti, Diogo P.
Format: Article
Language:English
Subjects:
Acetone
Benzene
Composite materials
Copper oxides
Detection
Ethanol
Graphene
Graphene-based composite
Heterojunctions
Humidity
Operating temperature
P-type semiconductors
p-type SMO
Relative humidity
Selectivity
Structural hierarchy
VOCs
Volatile organic compounds
Water cross-interference
Xylene
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:[Display omitted] •RGO-CuO composite was obtained by a one-pot microwave-assisted hydrothermal method.•RGO-CuO composite could be used for ethanol detection under high humid conditions.•The enhanced ethanol response can be attributed to the RGO/CuO interface. 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 °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 °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.
ISSN:0921-5107
1873-4944
DOI:10.1016/j.mseb.2019.114385