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首页> 外文期刊>RSC Advances >Silica nanostructures synthesis and CdTe quantum dots immobilization for photocatalytical applications
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Silica nanostructures synthesis and CdTe quantum dots immobilization for photocatalytical applications

机译：用于光催化的二氧化硅纳米结构合成和CdTe量子点固定化

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摘要

This work proposes a new strategy for the immobilization of semiconductor nanocrystals by carrying out simultaneously the synthesis of silica nanostructures and the encapsulation of MPA-capped CdTe quantum dots (QDs). The developed approach was bioinspired by the naturally occurring biosilicification process that some organisms, like diatoms and sponges, use to produce nanostructures of silica, and prevents the use of harsh and environmentally unfriendly conditions such as toxic and expensive organic solvents, high temperature and pressure and extreme pH values. Different parameters that could influence the silica particle synthesis and the QD immobilization, such as silica precursors, catalysts and ions concentration, pH and amount of QDs were evaluated. Encapsulation efficiency, size and the shape of biosilica structures were also determined by the experimental conditions. Immobilization and QD concentration has a strong impact on QD fluorescence and on the silica-QDs nanostructure stability.
机译：这项工作提出了一种通过同时进行二氧化硅纳米结构的合成和MPA封端的CdTe量子点（QD）封装来固定半导体纳米晶体的新策略。这种开发的方法受到自然发生的生物硅化过程的启发，某些硅藻和海绵等生物利用这种有机硅来生产二氧化硅的纳米结构，并防止使用苛刻且对环境不利的条件，例如有毒和昂贵的有机溶剂，高温和高压以及极端的pH值。评估了可能影响二氧化硅颗粒合成和固定化QD的不同参数，例如二氧化硅前体，催化剂和离子浓度，pH和QD数量。包封效率，大小和生物二氧化硅结构的形状也由实验条件确定。固定化和QD浓度对QD荧光和二氧化硅-QDs纳米结构的稳定性有很大影响。

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