Thermally Reduced Graphene Oxide Membranes From Local Kazakhstan Graphite Ognevsky

The properties of pure graphene and reduced graphene oxide (RGO) are close, so thermal annealing is a simple, safe and more cost-effective alternative, in comparison to other methods to produce graphene oxide (GO) on a significant scale. In this work, for the first time, for the production of GO and its membrane with subsequent thermal reduction, local Kazakhstan Ognevsky graphite was used as the initial raw material. The GO membrane was obtained by vacuum filtration and subjected to thermal annealing at various temperatures in a hydrogen atmosphere. It was noticed, that after the thermal recovery of GO membranes, their physical and chemical properties changed. This changes show the possibility of using GO new membranes as a potential material for sensitive elements, such kind of gas and humidity sensors. In this regard, GO and RGO membranes were studied by: SEM, EDX, FTIR, XRD, TGA and Raman spectroscopy. This work demonstrates a new and efficient strategy for manufacturing high performance RGO membranes from local raw materials. The properties of pure graphene and reduced graphene oxide (RGO) are close, so thermal annealing is a simple, safe and more cost-effective alternative, in comparison to other methods to produce graphene oxide (GO) on a significant scale.image

Automated summary

This study demonstrates a new and efficient strategy for manufacturing high performance reduced graphene oxide (RGO) membranes from local raw materials. The thermal recovery of graphene oxide (GO) membranes resulted in changes in their physical and chemical properties, making them potential materials for sensitive elements such as gas and humidity sensors.