| Full text | |
| Author(s): |
Zito, Cecilia A.
[1]
;
Perfecto, Tarcisio M.
[1]
;
Fonseca, Cristiane S.
[1]
;
Volanti, Diogo P.
[1]
Total Authors: 4
|
| Affiliation: | [1] Sao Paulo State Univ Unesp, Lab Mat Sustainabil LabMatSus, R Cristovao Colombo 2265, BR-15054000 Sao Jose Do Rio Preto, SP - Brazil
Total Affiliations: 1
|
| Document type: | Journal article |
| Source: | NEW JOURNAL OF CHEMISTRY; v. 42, n. 11, p. 8638-8645, JUN 7 2018. |
| Web of Science Citations: | 7 |
| Abstract | |
Recent advances in NiO-based gas sensors have been reported, but high working temperatures and dry conditions are usually required. Herein, we report the volatile organic compound (VOC) sensing performance of flower-like (FL) NiO hierarchical structures modified with reduced graphene oxide (RGO) sheets under high humidity. RGO/FL-NiO composites were synthesized by a simple and template-free microwave-assisted hydrothermal method and subsequent calcination at 250 degrees C. The VOC-sensing properties were investigated for several VOCs, such as acetone, ethanol, methanol, m-xylene, and toluene, at 90% relative humidity. The RGO/FL-NiO composites exhibited a decrease in the optimal operating temperature and enhanced methanol responses compared to pure FL-NiO. In addition, the 5% RGO/FL-NiO composite exhibited the highest response of 61.51% to 100 ppm of methanol at 180 degrees C, which was 1.4-9.9 times superior to responses to other VOCs, indicating the sensor's great selectivity. The improved methanol sensing properties could be attributed to the NiO/RGO heterointerface. (AU) | |
| 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: | 17/01267-1 - Graphene acid-hollow metal oxides composites for gas sensor |
| Grantee: | Diogo Paschoalini Volanti |
| Support Opportunities: | Regular Research Grants |
| 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: | 16/25267-8 - 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 |