Abstract

Cubic fluorite CeO₂ has band gap energy similar to that of TiO₂, exhibiting a certain photocatalytic activity, and it can be widely used to adsorb and degrade various organic dyes. Herein, self-assembled MXene-CeO₂ composites with CeO₂ nanoparticles uniformly loaded on the surface and between the layers of MXene was prepared by the hydrothermal method. Through the microstructure analysis of MXene-CeO₂ composites, it was proved that the MXene could not only effectively prevented the accumulation of CeO₂ nanoparticles during the production process but also provided a large attachment site for the generation of nanoparticles. In addition, the self-assembled MXene-CeO₂ exhibited good adsorption efficiency for adsorption of the cationic dyes rhodamine B (RhB) and methylene blue (MB) under ultraviolet light irradiation. Therefore, the prepared MXene-CeO₂ composite nanomaterial has significantly higher performance in degrading dyes and can be widely used in wastewater treatment.

摘要

立方萤石CeO _{2的带隙能量与TiO 2}相似，表现出一定的光催化活性，可广泛用于吸附和降解各种有机染料。在此，通过水热法制备了在MXene表面和层间均匀负载CeO ₂纳米颗粒的自组装MXene-CeO ₂复合材料。通过对MXene-CeO ₂复合材料的微观结构分析，证明MXene不仅可以有效防止CeO ₂纳米粒子在生产过程中的堆积，而且为纳米粒子的生成提供了较大的附着位点。此外，自组装的 MXene-CeO ₂在紫外光照射下对阳离子染料罗丹明B（RhB）和亚甲蓝（MB）的吸附表现出良好的吸附效率。因此，制备的MXene-CeO ₂复合纳米材料具有明显更高的降解染料性能，可广泛应用于废水处理。