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Shape and stoichiometry control of bismuth selenide nanocrystals in colloidal synthesis

机译:硒化物硝烯烃纳米铋中硒化物合成的形状和化学计量控制

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摘要

Three kinds of Bi-Se nanocrystals (Bi2Se3, Bi8Se9 and Bi1.007Se0.993) have been synthesized via a hot-injection approach. The colloid morphology, from hexagonal to octahedron, strongly depends on the injection temperature. The growth mechanism of Bi-Se nanocrystals is revealed here. A higher temperature could cause the reduction reaction from Bi3+ to Bi, and accelerate the reaction speed of Bi-Se, thus causing a difference of monomer concentration in bulk solution, which impacts the shapes of bismuth selenide nanocrystals as well as the composition. The three Bi-Se nanocrystals also show different optical and photoelectrocatalyst performance.
机译:通过热注射方法合成了三种Bi-SE纳米晶(Bi2Se3,Bi8Se9和Bi1.007Se0.993)。 从六边形到八面体的胶体形态强烈取决于注射温度。 这里揭示了Bi-Se纳米晶体的生长机制。 较高的温度可能导致Bi3 +至Bi的还原反应,并加速Bi-Se的反应速度,从而引起本体溶液中单体浓度的差异,这会影响硒化烷烃纳米晶体的形状以及组合物。 三个Bi-SE纳米晶体还显示出不同的光学和光电催化剂性能。

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  • 来源
    《RSC Advances》 |2016年第53期|共4页
  • 作者单位

    Cent S Univ Sch Met &

    Environm Changsha 410083 Peoples R China;

    Cent S Univ Sch Met &

    Environm Changsha 410083 Peoples R China;

    Cent S Univ Sch Met &

    Environm Changsha 410083 Peoples R China;

    Cent S Univ Sch Met &

    Environm Changsha 410083 Peoples R China;

    Cent S Univ Sch Met &

    Environm Changsha 410083 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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