LAUSR

MXene, a new type of two-dimensional layered transition metal carbide material differing from graphene, demonstrates intriguing chemical/physical properties and wide applications in recent years. Here, the preparation of the self-assembled MXene-gold nanoparticles (MXene@AuNPs) nanocomposites with tunable sizes is reported. The nanocomposites are obtained via the self-reduction reactions of MXene material in a HAuCl4 solution at room temperature. The sizes of the Au particles can be well-controlled by regulating the self-reduction reaction time. They can greatly influence the catalytic behaviors of the MXene@AuNPs composites. MXene@AuNPs composites with optimized reduction time show high catalytic performances and good cycle stability for model catalytic reactions of nitro-compounds, such as 2-nitrophenol and 4-nitrophenol. This work demonstrates a new approach for the preparation of tunable MXene-based self-assembled composites.摘要MXene是一种不同于石墨烯的新型层状二维过渡金属碳化物材料, 近年来表现出有趣的化学、 物理性能并被广泛应用. 本文报道了结构新颖且尺寸可调的自组装层状MXene@AuNPs纳米复合材料的制备方法. 在室温下MXene@AuNPs纳米复合材料可通过MXene材料在HAuCl4溶液中的自还原反应制备. 控制自还原反应的时间可精确地调节Au粒子的颗粒尺寸. 而金纳米颗粒的粒径对MXene@AuNPs复合材料的催化性能具有很大的影响. 适当自还原时间下得到的MXene@AuNPs复合材料表现出对模型硝基化合物(如4-NP和2-NA)催化反应很高的催化性能和良好的循环稳定性. 本研究工作为基于MXene自组装复合材料的制备与调控提供了新方法.