MXene and starch microspheres are used as adsorbent materials to remove the cationic dye Rhodamine B (RhB) from polluted water. Thin MXene layers are prepared via in situ generation of hydrofluoric acid etching, and MXene@starch microsphere (MX@SM) complexes are synthesized through a process based on the starch microsphere synthesis mechanism. Adsorption experiments reveal that RhB removal by MX@SM complexes follows a chemisorption mechanism, as confirmed by both kinetic and isothermal studies. When pH was 7, the adsorption time was 120 min and MX@SM of 0.24 g, the adsorption capacity reached the maximum; The kinetic analysis showed that the adsorption behavior was more in line with the second-order kinetics, indicating that the adsorption behavior was more in line with chemical adsorption. The maximum adsorption capacity (qm) increases from 94.44 to 126.46 mg/g as the temperature is increased from 25 ℃ to 45 ℃. Thermodynamic analysis further supports chemisorption as the predominant mechanism. The adsorption process is spontaneous. After five adsorption–desorption cycles, the adsorption capacity of MX@SM complexes decreases by approximately 14%, indicating good reusability of the prepared adsorbent. Research findings indicate that this material is economical, stable, highly efficient, and user-friendly, representing a novel adsorbent for removing RhB from water.
Xu et al. (Thu,) studied this question.