QUALITY CONTROL OF GRAPHENE OXIDE PRODUCTION WITH LARGE AREA SHEETS

1,2 SVEC Pavel
Co-authors:
1,2 BYTESNIKOVA Zuzana 1,2 PRIKRYL Vojtech 2 PEKARKOVA Jana 1 VANKOVA Lenka 2 GAREHBAGHI Sanam 1,2 RICHTERA Lukas 1,2 ADAM Vojtech
Institutions:
1 Department of Chemistry and Biochemistry, Mendel University in Brno, Brno, Czech Republic, EU, svecpavel@centrum.cz
2 Central European Institute of Technology, Brno University of Technology, Brno, Czech Republic, EU, svecpavel@centrum.cz
Conference:
13th International Conference on Nanomaterials - Research & Application, Orea Congress Hotel Brno, Czech Republic, EU, October 20 - 22, 2021
Proceedings:
Proceedings 13th International Conference on Nanomaterials - Research & Application
Pages:
53-58
ISBN:
978-80-88365-00-6
ISSN:
2694-930X
Published:
22nd November 2021
Proceedings of the conference have already been published in Scopus and we are waiting for evaluation and potential indexing in Web of Science.
Metrics:
105 views / 51 downloads
Abstract

There are many processes and modifications for the production of graphene oxide (GO) that are based on the original synthesis by W.S.Hummers and R.E.Offeman (1957), B.C.Brodie (1859), L.Staudenmaier (1898). Not all modifications produce high-quality material. The GO production process we use is a modified production according to Mr. W.S.Hummers and Mr. R.E.Offeman. Because the synthesis itself consists of several individual steps each step must be controlled in order to achieve the best result. Quality control at every step helps us to reduce the content of impurities and increase the yield of the final product. Impurities can be toxic or electrochemically active and thus have a direct effect on the application of the produced material. The ideal result is that the final product will contain only GO with individual large sheets and will not contain any other impurities and byproducts from synthesis such as potassium, chlorine, sulfur, manganese salts, or non-exfoliated graphite oxide. At the same time, we must reach sufficient production and small losses. We use Scanning Electron Microscopy with Energy Dispersive X-ray Analysis (SEM-EDX), conductometer, and pH meter to control the individual steps. The result of our production is single layer GO with large area sheets.

Keywords: Graphene oxide, large area sheets, impurities, nanomaterials, synthesis

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