荧光碳点的快速合成及在Hg^(2+)检测中的应用  

Rapidly Synthesis of Fluorescent Carbon Dots and Their Application in Hg^(2+) Detection

作　　者：陈宽[1] 于淑娟[1] 覃金凤 黄雪梅[1] 韦愉 

机构地区：[1]广西师范学院化学与材料科学学院,广西南宁530001

出　　处：《化工技术与开发》2015年第10期13-16,共4页Technology & Development of Chemical Industry

摘　　要：以葡萄糖为碳源,双氧水为氧化剂快速合成了一种水溶性好、表面含有羧基、羟基的荧光碳点(CDs)。通过红外光谱与荧光光谱对碳点进行了表征,所合成的碳点量子产率为6.92%,发射光谱随着激发波长红移而红移。研究了碳点溶液在不同p H值下的荧光强度,结果表明碳点溶液对p H值没有明显的依赖性,在p H为8的条件下有较高的荧光强度。将合成的荧光碳点应用到金属离子检测中,发现碳点对Hg2+有较明显的荧光淬灭现象,说明碳点可以用于水溶液中Hg2+离子的检测。Water-solubility fluorescent carbon dots（CDs） containing surface carboxyl and hydroxyl were rapidly synthesized using glucose as the carbon source and hydrogen peroxide as the oxidative agent. CDs were characterized by FT-IR and fluorescence spectroscopy. The quantum yield of the fluorescent CDs was 6.29% as characterized by fluorescence spectroscopy analysis at the excitation wavelength of 310 nm. The emission spectra wavelength showed bathochromic-shift effect along with the increase of excitation wavelength. Fluorescence intensity of the fluorescent CDs solution was tested at different p H values. The results showed that the fluorescence intensity of CDs solution not dependent on the p H value. When the p H value was 8, the CDs solution had the maximum fluorescence intensity. Obvious fluorescence quenching phenomenon of the fluorescent CDs to Hg2＋ was found through fluorescence spectra data analysis, demonstated that the fluorescent CDs could be used to detect Hg2＋.

关 键 词：荧光碳点 葡萄糖 离子检测 Hg2+离子 

分 类 号：O613.71[理学—无机化学]