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用甲酰胺作溶剂和配位剂,通过温和的溶剂热路线成功地大量合成了PbSe纳米立方块.运用一系列技术手段,如粉末X光衍射(XRD)、透射电子显微术(TEM)、X光电子能谱(XPS)和傅立叶变换红外光谱等对所合成的PbSe立方块进行表征.纳米立方块的平均颗粒尺寸约为20 nm.相对于[100],[111]方向较快的生长速率导致了纳米立方块的形成,并提出了可能的生长机理.同时,对所得产物的光学性质进行研究,可能由于纳米颗粒的量子效应,吸收光谱出现蓝移现象.
With formamide as solvent and complexing agent, a large number of PbSe nanocubes were successfully synthesized by a mild solvothermal route. A series of techniques, such as powder X-ray diffraction (XRD), transmission electron microscopy (TEM) The synthesized PbSe cubics were characterized by X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), etc. The average particle size of the nanocubes was about 20 nm. Relative to [100], the faster growth rate Leading to the formation of nanocubes and the possible growth mechanism.At the same time, the optical properties of the obtained product were studied, probably due to the quantum effect of the nanoparticles and blue shift of the absorption spectrum.