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首页> 外文期刊>RSC Advances >Efficient and scalable synthesis of quantum dots using hexane as the solvent in a non-microfluidic flow reactor system
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Efficient and scalable synthesis of quantum dots using hexane as the solvent in a non-microfluidic flow reactor system

机译：在非微流体流动反应器系统中使用己烷作为溶剂高效且可扩展地合成量子点

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Quantum dots (QDs) synthesis has been widely carried out in Schlenk line systems. However, there are two drawbacks of these systems, which have restricted their use for large scale or commercial production of QDs. One is the use of expensive and high-boiling point solvents and the other is that QDs need to be continuously produced with high production rate to reduce production costs. Nowadays, microfluidic flow systems are the most popularly used systems for the continuous production of QDs. However, their narrow channels limit the reaction volume and flow rate. In this report, a non-microfluidic flow reactor system has been developed to synthesize high quality CdSe QDs by injecting the solution containing the mixture of Cd-oleic acid (Cd-OA) and Se-tributylphosphine (Se-TBP) into near critical or supercritical hexane. The optical properties of the produced CdSe QDs can be fine-tuned to almost cover the entire visible region (450-630 nm) by changing the reaction parameters. The CdSe QDs produced with this approach are similar to those produced in Schlenk line, and can be functionalized with a ZnS shell to enhance PL efficiency. Moreover, we have also achieved a continuous synthesis of 5 g CdSe QDs with a production rate of 2.5 g h(-1) to demonstrate the potential capability of mass production with this system. White light emitting diodes can be prepared by using CdSe QDs as the phosphor dye. Finally, other types of QDs, such as CdS, ZnS, and ZnSe, were also synthesized to demonstrate the generalization of the developed approach.
机译：量子点（QD）合成已在Schlenk线系统中广泛进行。但是，这些系统有两个缺点，这限制了它们在QD的大规模生产或商业生产中的使用。一种是使用昂贵且高沸点的溶剂，另一种是需要以高生产率连续生产QD，以降低生产成本。如今，微流体流动系统是连续生产QD的最常用系统。但是，它们狭窄的通道限制了反应体积和流速。在本报告中，已经开发了一种非微流体流动反应器系统，通过将含有Cd-油酸（Cd-OA）和Se-三丁基膦（Se-TBP）混合物的溶液注入到接近临界状态或超临界己烷。通过更改反应参数，可以对生成的CdSe QD的光学特性进行微调，使其几乎覆盖整个可见区域（450-630 nm）。用这种方法生产的CdSe QD与Schlenk系列生产的CdSe QD相似，可以用ZnS壳功能化以提高PL效率。此外，我们还实现了5 g CdSe QD的连续合成，生产率为2.5 g h（-1），以证明使用该系统进行批量生产的潜在能力。可以通过使用CdSe量子点作为荧光染料来制备白色发光二极管。最后，还合成了其他类型的QD，例如CdS，ZnS和ZnSe，以证明所开发方法的一般性。

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