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将厌氧条件处理的牛粪作为碳源通过水热法合成了蓝色荧光发射的碳量子点。该量子点在水中稳定性和分散性良好,具有激发波长依赖的荧光发射现象,从430nm红移至560nm。在中性水溶液中,汞离子(Hg~(2+))对碳量子点的荧光发射干扰明显。随着Hg~(2+)体积的增加,450nm处的荧光强度逐渐减弱,两者呈现出较好的线性关系。对定性定量检测环境中的Hg~(2+)具有重要的意义。
Anaerobic conditions treated cow dung as a carbon source by hydrothermal synthesis of blue fluorescence emission of carbon quantum dots. The QDs have good stability and dispersibility in water and have an excitation wavelength-dependent fluorescence emission phenomenon, red-shifted from 430 nm to 560 nm. In neutral aqueous solution, mercury ion (Hg 2+) interfered with the fluorescence emission of carbon quantum dots obviously. With the increase of Hg ~ (2+) volume, the fluorescence intensity at 450 nm gradually decreased, showing a good linear relationship. It is of great significance to qualitatively and quantitatively detect Hg 2+ in the environment.