| Full text | |
| Author(s): |
Zito, C. A.
;
Volanti, D. P.
;
Kriven, WM
;
Wang, J
;
Zhou, Y
;
Zhu, D
;
Costa, G
Total Authors: 7
|
| Document type: | Journal article |
| Source: | DEVELOPMENTS IN STRATEGIC CERAMIC MATERIALS II; v. N/A, p. 7-pg., 2017-01-01. |
| Abstract | |
Nanocomposites based on metal oxide semiconductors and reduced graphene oxide (RGO) have been proposed as gas sensors to respond at room temperature. In this work, we prepared SnO2-RGO nanocomposite by microwave-assisted hydrothermal (MAH) method in one-step. The combined characterization techniques including X-ray diffraction (XRD), Fourier-transform infrared (MIR) spectroscopy, field emission-scanning electron microscopy (FESEM), energy dispersive spectroscopy (EDS) and transmission electron microscopy (TEM) confirm the formation of SnO2-RGO nanocomposite, and the distribution of SnO2 nanoparticles on RGO surface. The gas sensing performance of SnO2-RGO was evaluated by ethanol exposure at room temperature (21 degrees C). The results of gas sensing performance reveal that SnO2-RGO sensor has a great response to ethanol at room temperature, with a response time of about 100 seconds for the highest concentration of the gas (1,500 ppm). Moreover, it was found that the sensor has a higher selectivity for ethanol than for methanol. It is considered that RGO plays an important role in the gas sensing response. (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 Opportunities: | 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 Opportunities: | Scholarships in Brazil - Master |