Anatase titanium dioxide quantum dots (QDs) are synthesized by using a mixture of two kinds of titanium precursors and simple hydrothermal method in aqueous solution without any template and organic solvent. The obtained product is assessed by X-ray diffraction (XRD), selected area electrondiffraction (SAED), Raman spectroscopy, transmission electron microscopy (TEM) and ultraviolet-visible diffuse reflectance analysis (UV-DRS). The results of XRD, SAED and Raman spectrum demonstrate that pure anatase TiO is produced. The TEM images reveal that TiO anatase QDs are almost sphere in shape and with a mean particle diameter of ~4 nm. The energy band gap value (Eg) is calculated to be ~3.79 eV. The synthesized TiO QDs present enhanced photocatalytic activity and stability for the photodegradation of organic dyes under UV light irradiation.

中文翻译：

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混合钛前驱体水热合成 TiO2 量子点


锐钛矿型二氧化钛量子点（QDs）是采用两种钛前驱体的混合物，在不使用任何模板剂和有机溶剂的水溶液中，通过简单的水热法合成的。通过X射线衍射(XRD)、选区电子衍射(SAED)、拉曼光谱、透射电子显微镜(TEM)和紫外-可见漫反射分析(UV-DRS)对所得产物进行评估。 XRD、SAED 和拉曼光谱结果表明生成了纯锐钛矿型 TiO2。 TEM 图像显示 TiO2 锐钛矿量子点几乎呈球形，平均粒径约为 4 nm。计算得出的能带隙值 (Eg) 约为 3.79 eV。合成的 TiO QD 在紫外光照射下对有机染料的光降解具有增强的光催化活性和稳定性。