Abstract CdSe quantum dots (QDs) are semiconductor materials and possess unique optical and electronic properties, therefore being increasingly used in many fields. Biosynthesis of CdSe QDs has several advantages over the chemical synthesis route. In this study, the CdSe QDs were biosynthesized using a yeast Rhodotorula mucilaginosa PA-1 under the aerobic condition. The regulation of QDs biosynthesis was achieved by changing the concentration of precursors and the pH of the medium. The concentration of cadmium ions but not selenium ions determined the synthesis of CdSe QDs. Synthesized CdSe QDs with a narrow size distribution (3.2 ± 0.4 nm) exhibited great photocatalytic activity under ultraviolet and visible light using a dye malachite green (MG) as a model pollutant. The photocatalytic degradation efficiency of MG was 86.5 % and 94.28 % after 60 min irradiation under ultraviolet and visible light, respectively, which is comparable for those catalyzed by various nanomaterials through chemical synthesis.

中文翻译：

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粘液红酵母 PA-1 生物合成硒化镉量子点用于光催化

摘要 CdSe 量子点（QDs）是一种半导体材料，具有独特的光学和电子特性，因此在许多领域得到越来越多的应用。与化学合成路线相比，CdSe QD 的生物合成有几个优点。在这项研究中，CdSe QD 是在有氧条件下使用酵母 Rhodotorula mucilaginosa PA-1 生物合成的。量子点生物合成的调节是通过改变前体的浓度和培养基的 pH 值来实现的。镉离子而不是硒离子的浓度决定了 CdSe QD 的合成。合成的具有窄尺寸分布 (3.2 ± 0.4 nm) 的 CdSe QDs 使用染料孔雀石绿 (MG) 作为模型污染物在紫外和可见光下表现出很好的光催化活性。MG的光催化降解效率为86.5%和94。