以香烟过滤嘴为原料制备碳量子点应用于多巴胺的测定  

Preparation of Carbon Quantum Dots from Cigarette Filters for Detection of Dopamine

作　　者：彭小珊 苏安梅[1] 文辉忠[1] 钟青梅[1] 陈羽烨 王益林[1] PENG Xiao-shan;SU An-mei;WEN Hui-zhong;ZHONG Qing-mei;CHEN Yu-ye;WANG Yi-lin(Guangxi Key Laboratory of Biorefinery,School of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China)

机构地区：[1]广西大学化学化工学院广西生物炼制重点实验室,广西南宁530004

出　　处：《发光学报》2018年第3期388-393,共6页Chinese Journal of Luminescence

基　　金：广西自然科学基金(2014GXNSFAA118328);广西生物炼制重点实验室开放基金(GXKLB-2)资助项目~~

摘　　要：以香烟过滤嘴为原料,采用水热法制备碳量子点;基于多巴胺能猝灭碳量子点荧光的实验现象,发展了一种以碳量子点为荧光探针、在p H=8.0的磷酸盐缓冲溶液中测定多巴胺的分析方法,并探讨了荧光猝灭机理。在选定的实验条件下,当多巴胺浓度在1.2~84.0μmol/L范围内时,荧光强度的猝灭值与浓度呈良好的线性关系,方法的检出限(3σ/k)为0.80μmol/L。采用该方法对实际样品中的多巴胺进行测定,结果满意。Carbon quantum dots(CQDs)were prepared by hydrothermal treatment with cigarette filters as raw material.The results indicate that the fluorescence could be quenched by dopamine with high specificity.Based on this phenomenon,a fluorescence sensor was developed for the detection of dopamine in phosphate solutions(pH=8.0).Furthermore,the quenching mechanism of the CQDs was elucidated.The fluorescence quenching value showed linear responses with dopamine concentration ranging from 1.2 to 84.0μmol/L with the detection limit of 0.80μmol/L(3σ/k).Satisfactory results were achieved when the method was submitted to the determination of dopamine in real samples.

关 键 词：碳量子点 荧光猝灭 测定 多巴胺 

分 类 号：O611.4[理学—无机化学]