Synthesis of a Two-Dimensional MXene Modified by Chloroacetic Acid and Its Adsorption of Uranium

As nuclear energy industry develops, uranium plays an important role as the main raw material of nuclear reactor, but it inevitably produces more and more nuclear waste. MXenes are a promising material for the treatment of nuclear waste, but it remains a challenge to address the stacking and oxidability of materials for the treatment of nuclear waste. In this study, carboxyl groups were connected to the surface of Ti3C2Tx, which improved the interlayer distance and adsorption capacity for uranium of the material. Characterization methods including XRD, FT-IR, BET, SEM and TG were used to analyze the material, which confirmed the successful synthesis of the materials. Under the conditions of pH 5.0, C-0=80 mg L-1, T=308 K, the maximum adsorption quantity of C-TC material for uranium reached 165.43 mg g(-1). The adsorption reaction of uranium conformed to the quasi-second-order kinetic model and Langmuir isotherm model, belonged to chemical monolayer adsorption. This research provided an effective strategy for the modification of MXene nanosheets and a new option for the treatment of nuclear waste.