单层纳米片三维结构的控制合成及其电催化性能研究

Three dimensional structure composed of single layer nanosheets have drawn intense interest recently for their promising applications in electrocatalysis and energy storage, due to the unique properties of the single layer nanosheets originated from the quantum confined effect, surface effect and anisotropism, as well as the high structure stability and abundant active sites of the three dimensional structure.However, it remains a great challenge to synthesize the high quality three dimensional structures composed of single layer nanosheets in a facile solution chemistry. Here, we propose to prepare the three dimensional structures through a facile solution chemistry by adding two different functional ligands, in which one ligand directs the nucleation of the nanosheets in three dimension and another ligand leads the growth of the nanosheets in two dimension, resulting the three dimensional structures composed of nanosheets. The reaction conditions, including the reaction temperature, reaction time, the ligands compostion and the precursors concentraions, will be systematically investigated to obtain the three dimensional structures with high monodispersity, tunable pore size, and high structural stability, and further study theie applications in electrocatalysis.

单层纳米片三维结构由单层纳米片组装而成，其中单层纳米片由于其量子限域效应、表面效应以及高度各向异性体现出与体相材料截然不同的物理化学性质，同时三维结构由于其结构稳定并且使纳米片活性位点充分暴露（片与片之间不相互堆叠），因此，在电催化、能量存储等领域具有诱人的应用前景。但是如何建立简单、普适的溶液合成策略，制备高质量单层纳米片三维结构并开展其性能研究是目前无机化学制备与合成技术亟待解决的问题。本课题选择金属硫属化合物作为单层纳米片基元来构建其三维结构，拟采用液相回流法，通过选择两种功能配体分子，其中一种配体分子指导纳米晶体在三维空间的成核和生长，另一种引导纳米片在二维方向生长，协同作用制备单层纳米片三维结构，优化反应条件（温度、时间、配体分子比例、前驱体浓度等），获得尺寸均匀、孔隙率可调、稳定性高的高质量单层纳米片三维结构，并开展其在电催化领域的应用基础研究。