Synthesis of RGO/SiO 2 and Ag/RGO/SiO 2 Nanocomposites and Study of Their Sensitivity Towards Humidity

In recent years, many interesting researches published on the study of new nanocomposite materials involves active components such as reduced graphene oxide (RGO), silver nanoparticles (Ag-NPs), and silica, which indicated very interesting properties and applications. The present work demonstrates the preparation of nanocomposite powders with the participation of Ag-NPs, RGO and tetraethyl-orthosilicate (TEOS) using the sol-gel technique. The phase formations are verified by X-ray diffraction analysis. The thermal behavior was studied using differential thermal analysis (DTA/TG) in air. The sensitivity against humidity was tested in a laboratory apparatus made of a thermostatic chamber operating at 25 °C, in which the RH could be varied between 0% and 96%.