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首页> 外文期刊>Nanotechnology >Two-minute synthesis of PbS nanocubes with high yield and good dispersibility at room temperature
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Two-minute synthesis of PbS nanocubes with high yield and good dispersibility at room temperature

机译：在室温下两分钟合成高产率和良好分散性的PbS纳米立方体

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摘要

A novel water./glycerol/polyvinylpyrrolidone (PVP) ternary system is developed to realize the successful growth of PbS nanocubes with a narrow size distribution and sharp facets and edges using a one-step synthesis at room temperature for the first time. The synthesis is very fast, high yield, environment-friendly, and low cost. The product possesses uniform dimensionality, high crystallinity and better dispersibility. After dispersing the nanocubes in water or ethanol, the as-formed colloidal suspensions can maintain excellent stability for more than one year under ambient conditions. Uniform silica layers were successfully coated onto the nanocubes via a modified St_ber method to enhance their performance for promising applications. Moreover, by soaking the as-prepared PbS/SiO_2 core_shell nanocubes in hydrochloric acid aqueous solution, well-resolved cubic SiO_2 nanoboxes were obtained. The formation mechanism and the reason for the better dispersibility and excellent stability of the as-obtained nanocubes are also discussed rationally.
机译：开发了一种新颖的水/甘油/聚乙烯吡咯烷酮（PVP）三元体系，以首次在室温下一次一步合成，实现了具有窄尺寸分布，尖锐的刻面和边缘的PbS纳米立方体的成功生长。合成非常快，产率高，环境友好且成本低。该产品尺寸均匀，结晶度高，分散性好。将纳米立方体分散在水或乙醇中后，形成的胶体悬浮液可以在环境条件下保持优异的稳定性一年以上。通过改良的St_ber方法将均匀的二氧化硅层成功地涂覆在纳米立方体上，以增强其在有前途的应用中的性能。此外，通过将所制备的PbS / SiO_2核壳纳米立方体浸泡在盐酸水溶液中，获得了分辨率良好的立方SiO_2纳米盒。还合理地讨论了所获得的纳米立方体的形成机理以及更好的分散性和优异的稳定性的原因。

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