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Water-Soluble and Lowly Toxic Sulphur Quantum Dots

机译：水溶性低毒硫量子点

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摘要

Here, a new class of quantum dots, that is, sulphur quantum dots (SQDs), which are synthesized by the phase interfacial reaction, is reported. The prepared SQDs are monodisperse with a narrow size distribution (average 1.6 nm in size), excellent aqueous dispersibility, ultrahigh photostability, and lowly toxicity. Because of abundant oxidized sulphur species on the surface of SQDs, the incorporation of TiO_2 with SQDs results in a synergistic effect for the TiO_2-based photocatalysts offering more effective environmental applications. It is demonstrated that SQDs-TiO_2 nanocomposite can enhance the photocatalytic activity of producing hydrogen (enhancement factor for 191) in methanol-water system. The SQDs also can used as fluorescent probe for highly selective quantitative detection Fe~(3+) in an aqueous solution contained various metal ions.
机译：在此，报道了通过相界面反应合成的新型量子点，即硫量子点（SQD）。制备的SQD是单分散的，具有窄的尺寸分布（平均尺寸为1.6 nm），优异的水分散性，超高的光稳定性和低毒性。由于在SQD的表面上存在大量氧化的硫，因此TiO_2与SQD的结合会为基于TiO_2的光催化剂带来协同效应，从而提供更有效的环境应用。结果表明，SQDs-TiO_2纳米复合材料可以增强甲醇-水体系中产氢的光催化活性（191的增强因子）。 SQDs还可作为荧光探针用于高选择性定量检测含有各种金属离子的水溶液中的Fe〜（3+）。

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  • 来源
    《Advanced Functional Materials》 |2014年第45期|7133-7138|共6页
  • 作者

    Shunxing Li; Dejian Chen; Fengying Zheng; Haifeng Zhou; Shaoxiong Jiang; Yijin Wu;

  • 作者单位

    College of Chemistry and Environmental Science Minnan Normal University 363000, China, Fujian Province Key Laboratory of Modern Analytical Science and Separation Technology Minnan Normal University 363000, China;

    College of Chemistry and Environmental Science Minnan Normal University 363000, China;

    College of Chemistry and Environmental Science Minnan Normal University 363000, China, Fujian Province Key Laboratory of Modern Analytical Science and Separation Technology Minnan Normal University 363000, China;

    College of Chemistry and Environmental Science Minnan Normal University 363000, China;

    College of Chemistry and Environmental Science Minnan Normal University 363000, China;

    College of Chemistry and Environmental Science Minnan Normal University 363000, China;

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