论文部分内容阅读
以商业蜂花粉为碳源,通过一步水热法制备出氮掺杂的荧光碳量子点作为荧光试剂,并选取金和银纳米颗粒作为光吸收剂,发展了一种基于纳米颗粒内过滤效应以检测氰根离子的荧光方法.金和银纳米颗粒的吸收光谱与碳量子点的激发和发射光谱重叠,满足内过滤效应条件.由于内过滤效应,纳米颗粒可显著猝灭碳量子点的荧光;而当引入氰根离子后,纳米颗粒在氰根离子作用下消蚀变小,对光的吸收变弱,使得碳量子点的荧光逐渐变强,从而实现对氰根离子的选择性检测.
Using commercial bee pollen as carbon source, one-step hydrothermal method was used to prepare nitrogen-doped fluorescent carbon quantum dots as fluorescent reagent, and gold and silver nanoparticles as light absorbers were selected to develop a nano- Fluorescence detection of cyanide ions.The absorption spectra of gold and silver nanoparticles overlap with the excitation and emission spectra of carbon quantum dots to meet the conditions of internal filtration.The nanoparticles can significantly quench the fluorescence of carbon quantum dots due to the internal filtration effect, When cyanide ion is introduced, the nanoparticles will disappear under the action of cyanide ions, and the absorption of light will be weakened, so that the fluorescence of carbon quantum dots will become stronger and the selectivity of cyanide ions will be detected.