A Study of Methylene Blue Dye Interaction and Adsorption by Monolayer Graphene Oxide

0561008 - ÚACH 2023 RIV US eng J - Journal Article
Ederer, J. - Ecorchard, Petra - Šrámová Slušná, Michaela - Tolasz, Jakub - Smržová, Darina - Lupínková, S. - Janoš, P.
A Study of Methylene Blue Dye Interaction and Adsorption by Monolayer Graphene Oxide.
Adsorption Science & Technology. Roč. 2022, AUG (2022), č. článku 7385541. ISSN 0263-6174. E-ISSN 2048-4038
R&D Projects: GA MŠMT(CZ) LM2018124; GA TA ČR(CZ) TH04030285
Institutional support: RVO:61388980
Keywords : heavy-metal ion * anionic dyes * activated carbon
OECD category: Inorganic and nuclear chemistry
Impact factor: 2.9, year: 2022
Method of publishing: Open access

The graphene oxide (GO) interaction with methylene blue (MB) cationic dye was studied in an aqueous solution at different pH during MB adsorption. The mutual interaction of MB with GO surface was studied and evaluated by Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). The π-π and electrostatic interaction of MB with GO surface are the main types of interactions, and the XRD data show the monomeric arrangement of MB cation with GO. The GO surface functional groups and point of zero charge (PZC) were determined by acid-base titration. Suitability of zeta-potential measurement and acid-base titration method was briefly discussed. The quality of prepared GO was evaluated by Raman spectroscopy, XRD, and atomic force microscope (AFM). The experimental adsorption equilibrium data were analyzed using Langmuir, Langmuir-Freundlich, Freundlich, and Temkin isotherms. The GO maximum adsorption capacity increases with higher pH, that is ascribed to the facile interaction of negatively charged GO with positively charged MB structure.
Permanent Link: https://hdl.handle.net/11104/0333758