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首页> 外文期刊>Nature Communications >Sustainable scalable synthesis of sulfide nanocrystals at low cost with an ionic liquid sulfur precursor
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Sustainable scalable synthesis of sulfide nanocrystals at low cost with an ionic liquid sulfur precursor

机译:用离子液体硫前体以低成本可持续地扩展合成硫化物纳米晶体

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Increasing the sustainability of nanocrystals is crucial to their application and the protection of the environment. Sulfur precursors for their synthesis are commonly obtained through multiple steps from H2S, only to be converted back to H2S during the synthesis of the nanocrystals. This convoluted process requires energy, reduces yields, increases waste and auxiliaries, and complicates recycling. Using H2S directly could drastically improve sustainability, but is prevented by toxicity and handling. We here show that H2S is stabilized by reaction with oleylamine (the most common and versatile ligand in nanoparticle synthesis) to form an ionic liquid precursor that addresses all major principles of green chemistry: it is made in one exothermic step, it leaves the reaction yielding a safer product and allowing the separate recycling of the precursors, and it produces high quality nanocrystals with high yields (sulfur yield??70%) and concentrations (90?g?L?1) in ambient conditions.
机译:提高纳米晶体的可持续性对它们的应用和环境保护至关重要。用于合成的硫前体通常是通过多个步骤从H2S获得的,只是在纳米晶体的合成过程中才转化回H2S。这种复杂的过程需要能量,降低产量,增加浪费和助剂,并使回收复杂化。直接使用H2S可以极大地改善可持续性,但是会被毒性和处理所阻止。我们在这里表明,H2S通过与油胺(纳米颗粒合成中最常见和通用的配体)反应而稳定,从而形成一种可解决绿色化学所有主要原理的离子液体前体:它是在一个放热步骤中制备的,它使反应产生一种更安全的产品,可以单独回收前体,它可以在环境条件下以高收率(硫收率≥70%)和浓度(90ggL≤1)生产高质量的纳米晶体。

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