This study looks over the perspective of MXenes, a novel class of two-dimensional materials, for the effective removal of organic contaminants. MXenes are characterized by their high surface area, excellent conductivity, unique surface chemistry, and strong adsorption capabilities. These materials are synthesized by adapting selective etching of aluminum layers from MAX-phase precursors, resulting in a layered structure suitable for various applications, e.g., surface-enhanced Raman spectroscopy [1], electrochemical sensors for water quality monitoring [2]. In this study, the adsorption performance of MXenes in removing organic pollutants, specifically Methylene Blue and Azure A, from aqueous solutions across a pH range from 4 to 6, was investigated. Initial results indicate that MXenes pose significant potential for dye adsorption due to their large active surface area. The adsorption efficiency and adsorption coefficients of MXenes were evaluated and calculated for both dyes under different pH conditions. Additionally, kinetic studies reveal that MXenes facilitate rapid adsorption, and regeneration studies indicate MXenes’ reusability capabilities. The primary results indicate that MXenes could serve as a sustainable and highly efficient adsorbent for vast organic pollutant removal. This project received funding from the Research Council of Lithuania (LMTLT), agreement No. S-MIP-24-14 .
ADSORPTION PERFORMANCE OF MXENES FOR AZURE A AND METHYLENE BLUE: pH-DEPENDENT BEHAVIOUR AND KINETIC INSIGHTS
Germantė Paulikaitė1, Simonas Ramanavičius1, Šarūnas Žukauskas2, Martynas Talaikis3, Gediminas Niaura3, Oleksiy Gogotsi4
1 Center for Physical Sciences and Technology, Department of Electrochemical Material Science, Nanostructures Laboratory
2 Center for Physical Sciences and Technology, Department of Nanotechnology, Bioanalysis Laboratory
3 Center for Physical Sciences and Technology, Department of Organic Chemistry, Nanostructures Laboratory
4 Materials Research Center, Krzhizhanovskogo street, 3, 03680, Kyiv, Ukraine
[1] Adomavičiute-Grabusove S, Ramanavičius S, Popov A, Šablinskas V, Gogotsi O, Ramanavicius A. Selective enhancement of SERS spectral bands of salicylic acid adsorbate on 2D Ti3C2Tx-based MXene film. Chemosensors 2021;9:223. https://doi.org/10.3390/ijms21239224
[2] Ramanavičius S, Ramanavičius A. Progress and Insights in the Application of MXenes as New 2D Nano-Materials Suitable for Biosensors and Biofuel Cell Design. Int J Mol Sci 2020;21. https://doi.org/10.3390/ijms21239224