Abstract
Luminescence carbon nanoparticles (CNPs) have been prepared by refluxing the combustion soot of kerosene in nitric acid, and this approach can be used for milligram-scale synthesis of water-soluble particles. These fluorescent CNPs were stable in water for more than 3 months without fluorescence decreasing. Diameter of the water-soluble fluorescent CNPs obtained by scanning electron microscope was about 50 nm. In order to improve CNPs' properties, they were modified with thiocarbamide. The effect of adsorption and deposition for metal ions could be measured by inductively couple plasma atomic emission spectrometry. In addition, the responses to pH of thiocarbamide-modified CNPs were different from the responses of CNPs.
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