水热法合成茶叶荧光碳点的研究  

Synthesis of tea fluorescent carbon quantum dots by hydrothermal approach

作　　者：王俊 张汝国[1,4] 卢前赢 刘瑛 郭启燕[1,4] 黄晓玲 臧贵勇[1,4] 赵鸿宾 孟铁宏 胡先运[1,2,3,4] Wang Jun;Zhang Ruguo;Lu Qianying;Liu Ying;Guo Qiyan;Huang Xiaoling;Zang Guiyong;Zhao Hongbin;Meng Tiehong;Hu Xianyun(Qiannan Medical College for Nationalities,Guizhou Duyun 558000;The Collaborative InnovationCenter of Qiannan State for Ethnic and nano Medicine,Guizhou Guiyang 550002;The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences,Guizhou Guiyang 550002;The Key Laboratory of Chemistry for Natural Products of Guizhou medical university,Guizhou Duyun 558000)

机构地区：[1]黔南民族医学高等专科学校,贵州都匀558000 [2]贵州省中国科学院天然产物化学重点实验室,贵州贵阳550002 [3]贵州医科大学天然产物化学重点实验室,贵州贵阳550002 [4]黔南州民族药纳米医药协同创新中心,贵州都匀558000

出　　处：《云南化工》2020年第12期87-91,共5页Yunnan Chemical Technology

基　　金：国家自然科学基金项目(81860317);贵州省自然科学基金(黔科合支撑[2019]2821号,黔科合基础[2016]1136号);黔南科技计划项目(黔南州科合社字[2016]12号,黔南科合社字[2014]8号);黔南民族医专科研基金(QNYZ201801,QNYZ201807)项目资助。

摘　　要：以茶叶为碳源,乙二胺为表面修饰剂,通过一步水热法合成生物质荧光碳点。对茶叶用量、乙二胺用量、反应时间和反应温度进行了优化以及正交实验的处理,以荧光强度为指标,通过单因素分析表明:茶叶用量1.2 g碳点荧光强度最高、乙二胺用量0.8mL荧光强度最高、反应时间5h荧光强度最高、反应温度220℃荧光强度最高。通过正交试验表明最佳优化组合为:茶叶1.2g、乙二胺0.6mL、反应时间6h、反应温度220℃,碳点荧光强度最高,其荧光量子产率为8.2%,发射峰439nm,其半峰宽125nm,粒径3.0±0.25nm,且大小均匀、分散良好,富含氨基和羧基等官能团,在紫外灯的照射下发出蓝绿色的明亮荧光,为生物医学传感及成像打下基础。In this paper,we devise a thoroughly green approach,simple hydrothermal routes to synthesize highly photoluminescent biomass carbon nanodots(CDs)from Duyun Maojian,famous tea from China,with ethylenediamine as surface modifier.Four single different factors(tea weight,ethylenediamine volume,temperayure,reaction time)were discussed on the fluorescent intensity effects of CDs,respectively.The results showed that the best tea weight was 1.2 g,the best ethylenediamine volume was 0.8 mL,the best reaction time was 5h,the bestreaction temperayure was 220℃.The reaction conditions were also optimized by orthogonal experiment,successive.The corresponding results was 1.2 g,0.6 m L,6h,220℃,respectively.In optimal reaction conditions,the best fluorescent quantum yield of CDs was about 8.2%,The CDs had mono-disperse,those particle size was 3.0±0.25 nm,and being rich in amino and carboxyl functional groups,with brightly photoluminescent photos under lamp irradiation UV,which has a FL emission peak on 439 nm,and half peak width was 125 nm,lay the foundation for biomedical sensing and imaging.

关 键 词：水热法 生物质碳点 茶叶 都匀毛尖 

分 类 号：O657.3[理学—分析化学]