Iron oxide (Fe3O4)-laden titanium carbide (Ti3C2Tx) MXene stacks for the efficient sequestration of cationic dyes from aqueous solution. (January 2022)

• Record Type: Journal Article
• Authors: Rethinasabapathy, Muruganantham; Bhaskaran, Gokul; Park, Bumjun; Shin, Jin-Yong; Kim, Woo-Sik; Ryu, Jungho; Huh, Yun Suk
• Is Part Of: Chemosphere. Volume 286:Part 2(2022)
• Publication Date: 2022-01
• Subjects: Adsorption -- Iron oxide -- Methylene blue -- Regeneration -- Rhodamine B -- Ti3C2 MXene; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2021.131679
• Languages: English
• ISSNs: 0045-6535

Abstract

Abstract: We prepared two-dimensional (2D) stack-structured magnetic iron oxide (Fe3 O4 ) nanoparticle anchored titanium carbide (Ti3 C2 Tx ) MXene material (Ti3 C2 Tx /Fe3 O4 ). It was used as a potential adsorbent to remove carcinogenic cationic dyes, such as methylene blue (MB) and rhodamine B (Rh B), from aqueous solutions. Ti3 C2 Tx /Fe3 O4 exhibited maximum adsorption capacities of 153 and 86 mg g −1 for MB and Rh B dyes, respectively. Batch adsorption experimental data fits the Langmuir model well, revealing monolayer adsorption of MB and Rh B onto the adsorption sites of Ti3 C2 Tx /Fe3 O4 . Additionally, Ti3 C2 Tx /Fe3 O4 showed rapid MB/Rh B adsorption kinetics and attained equilibrium within 45 min. Moreover, Ti3 C2 Tx /Fe3 O4 demonstrated recyclability over four cycles with high stability due to the presence of magnetic Fe3 O4 nanoparticles. Furthermore, it exhibited remarkable selectivities of 91% and 88% in the presence of co-existing cationic and anionic dyes, respectively. Given the extraordinary adsorption capacities, Ti3 C2 Tx /Fe3 O4 may be a promising material for the effective removal of cationic dyes from aqueous media. Graphical abstract: Image 1 Highlights: Magnetic 2D MXene material towards multiple cationic dye sequestration. Unprecedented MB and Rh B adsorption capacities of 153 and 86 mg g −1, respectively. Presence of Fe3 O4 provides excellent regeneration capability with high stability. High selectivities of 91 % and 88 % for MB and Rh B, respectively, with rapid kinetics. MB and Rh B removal via electrostatic attraction and hydrogen bonding with MXene.