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

• Published in: Chemosphere (Oxford) Vol. 286; no. Pt 2; p. 131679
• Main Authors: Rethinasabapathy, Muruganantham, Bhaskaran, Gokul, Park, Bumjun, Shin, Jin-Yong, Kim, Woo-Sik, Ryu, Jungho, Huh, Yun Suk
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.01.2022
• Subjects: adsorbents; Adsorption; aqueous solutions; carcinogenicity; Iron oxide; iron oxides; magnetism; Methylene blue; Regeneration; Rhodamine B; rhodamines; sorption isotherms; Ti3C2 MXene; titanium; Regeneration; Ti3C2 MXene; Iron oxide; Rhodamine B; Adsorption; Methylene blue
• ISSN: 0045-6535; 1879-1298; 1879-1298
• DOI: 10.1016/j.chemosphere.2021.131679

We prepared two-dimensional (2D) stack-structured magnetic iron oxide (Fe3O4) nanoparticle anchored titanium carbide (Ti3C2Tx) MXene material (Ti3C2Tx/Fe3O4). 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. Ti3C2Tx/Fe3O4 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 Ti3C2Tx/Fe3O4. Additionally, Ti3C2Tx/Fe3O4 showed rapid MB/Rh B adsorption kinetics and attained equilibrium within 45 min. Moreover, Ti3C2Tx/Fe3O4 demonstrated recyclability over four cycles with high stability due to the presence of magnetic Fe3O4 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, Ti3C2Tx/Fe3O4 may be a promising material for the effective removal of cationic dyes from aqueous media. [Display omitted] •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 Fe3O4 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.