Two-dimensional Ti 3 C 2 MXene-derived Ti 3 C 2 -Ti 2 C-TiO 2 materials for improved diclofenac sodium adsorption performance

This paper aims to prepare an adsorbent based on MXene material for adsorbing diclofenac sodium (DCF). In this paper, Ti 3 C 2 -MXene was prepared by etching Ti 3 AlC 2 with hydrofluoric acid (HF). Ti 3 C 2 was subjected to a convenient and simple solvothermal treatment. TiO 2 and Ti 2 C were formed during the solvothermal process. According to the results of FT-IR and XRD, the formation of TiO 2 and Ti 2 C will increase the interlayer spacing of the prepared Ti 3 C 2 -12 h, thereby improving the adsorption performance of MXenes. The main factors affecting the adsorbent, the maximum adsorption capacity, and the interaction between the two factors were analyzed by single-factor experiment, orthogonal experiment, and response surface analysis. The maximum DCF adsorption capacities of Ti 3 C 2 and Ti 3 C 2 -12 h are 201 mg/g and 395 mg/g, respectively. MXene made from HF can absorb DCF under various pH conditions and maintain a high adsorption rate, which has important applications in environmental protection.