Back to Search
Start Over
Influence of the synthesis conditions on the microstructural, compositional and morphological properties of graphene oxide sheets
- Source :
- Ceramics International. 46:22067-22078
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- In this paper we report about the synthesis and characterization of graphene oxide (GO). We monitor the effects of the different synthetic processes on the morphological and structural properties of the materials. A modified Hummers' method is adopted to obtain GO powder; H2SO4 is employed as intercalating agent, to increase the distance between graphitic layers, while KMnO4 is used as oxidizing reagent for introducing the oxygen functionalities in the graphitic structure. The oxidized graphite powder is treated in acid solution; different washing cycles are applied. The recovered powders are dispersed in aqueous solution and sonicated for 30 min or 60 min, respectively. Subsequently, these solutions are deposited on Si and SiO2(317 nm)/Si substrates by means of dip coating. GO powders, GO solutions and GO on substrate are characterized through several analytical and spectroscopic techniques. These analyses reveal that the sonication time and the washing procedure of the samples can influence the structure and the morphology of the graphene oxide flakes. Moreover, when KOH is employed as alkaline agent in a chemical reducing treatment of the GO powder before sonication, a considerable alteration of the native structure of graphene oxide is observed. The detailed characterization indicates that the properties of the GO samples are strongly influenced by the chemical and physical treatments to which it is subjected.
- Subjects :
- Materials science
Characterization
Sonication
Oxide
02 engineering and technology
Graphene oxide, Hummers method, Characterization
01 natural sciences
Dip-coating
Hummers method
law.invention
chemistry.chemical_compound
law
0103 physical sciences
Oxidizing agent
Materials Chemistry
Graphite
Graphene oxide
010302 applied physics
Aqueous solution
Graphene
Process Chemistry and Technology
Substrate (chemistry)
021001 nanoscience & nanotechnology
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
Chemical engineering
chemistry
X-ray spectroscopy
Ceramics and Composites
0210 nano-technology
Subjects
Details
- ISSN :
- 02728842
- Volume :
- 46
- Database :
- OpenAIRE
- Journal :
- Ceramics International
- Accession number :
- edsair.doi.dedup.....c78f05428cb3b4445c62b4185ef00072
- Full Text :
- https://doi.org/10.1016/j.ceramint.2020.05.222