| Full text | |
| Author(s): |
Perfecto, T. M.
;
Zito, C. A.
;
Volanti, D. P.
Total Authors: 3
|
| Document type: | Journal article |
| Source: | RSC ADVANCES; v. 6, n. 107, p. 105171-105179, 2016. |
| Web of Science Citations: | 14 |
| Abstract | |
Nanostructured orthorhombic WO3 center dot 0.33H(2)O, hexagonal h-WO3 and their RGO composites (RGO-WO3 center dot 0.33H(2)Oand RGO-h-WO3) are reported for the purpose of efficient sensing of volatile organic compounds (VOCs) (e.g. acetone, methanol, benzene, toluene, and m-xylene). The materials were prepared at 140 degrees C by one-pot microwave-assisted hydrothermal (MAH) synthesis from Na(2)WO(4 center dot)2H(2)O and graphite oxide (in the case of composite) suspension in acid medium, without using any reducing, organic, or capping reagent. A three-dimensional (3D) nanocolumn bundles-like morphology was obtained for WO3 center dot 0.33H(2)O and RGO-WO3 center dot 0.33H(2)O. Whereas with subsequent heat treatment at 400 degrees C, it was possible to obtain h-WO3 and RGO-h-WO3 composites while preserving the nanocolumn bundles-like morphology. The sensing properties of these materials were investigated by exposing them to various VOCs at room temperature and at 55% relative humidity. We found that all the materials behave as a p-type semiconductor after being exposed to reducing gases. Response to 100 ppm of acetone to the RGO-h-WO3 sensor was observed to be 20% larger than the h-WO3 sensor. (AU) | |
| 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 |
| 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: | 15/04306-2 - One-pot microwave-assisted hydrothermal synthesis of tungsten trioxide-reduced graphene oxide composites for detection acetoneion acetone |
| Grantee: | Tarcísio Micheli Perfecto |
| Support Opportunities: | Scholarships in Brazil - Scientific Initiation |
| 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 |