开发与应用

茶叶为碳源水热法合成碳量子点及其应用研究

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  • 1.宁德师范学院茶产业与文化研究所,宁德师范学院化学与材料学院,宁德352100;
    2.福建省生态产业绿色技术重点实验室,武夷学院生态与资源工程学院,南平354300
李萍(1979-),女,博士研究生,副教授,主要从事功能纳米材料的研究,环境污染物的传感分析和固体废弃物资源化利用方面的研究,E-mail:lp993@126.com。

收稿日期: 2021-04-05

  修回日期: 2021-07-15

  网络出版日期: 2021-09-30

基金资助

福建省自然科学基金面上项目(2018J01508和2016N0026);福建省新世纪优秀人才支持计划项目(2018);宁德师范学院校级科研经费资助项目(2016Q46、2017T03、2017C014和2020Y014);福建省生态产业绿色技术重点实验室开放基金项目(WYKF2017-6)

Synthesis of CQDs by hydrothermal method using tea as carbon source and its application

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  • 1. Institute of Tea Industry and Culture,School of Chemistry and Materials,Ningde Normal University,Ningde 352100;
    2. Key Laboratory of Green Technology for Ecological Industry of Fujian Province,College of Ecology and Resource Engineering,Wuyi University,Nanping 354300

Received date: 2021-04-05

  Revised date: 2021-07-15

  Online published: 2021-09-30

摘要

以铁观音茶叶为原料,使用水热法合成发蓝色荧光的碳量子点(CQDs),采用透射电镜对其形貌进行表征,通过紫外-可见吸收光谱、荧光光谱对其发光性能进行研究。将合成的CQDs作为荧光探针用于水体中Cr6+离子的检测,探讨了pH、反应时间对Cr6+离子检测的影响。结果表明:在最优检测条件下,CQDs的荧光猝灭率与Cr6+离子浓度呈现良好的线性关系,检测的线性范围为2.0~9.0μmol/L,检测限为0.15μmol/L,加标回收率为94%~102%。该法具有高灵敏度、高准确性,对Cr6+离子的检测取得了较好的效果。

本文引用格式

李萍 . 茶叶为碳源水热法合成碳量子点及其应用研究[J]. 化工新型材料, 2021 , 49(9) : 230 -233 . DOI: 10.19817/j.cnki.issn 1006-3536.2021.09.050

Abstract

Tieguanyin tea was used as raw material to synthesize blue fluorescent carbon quantum dots (CQDs) by hydrothermal method.The morphology of CQDs was characterized by transmission electron microscopy.The luminescence properties of CQDs were studied by UV-Vis absorption spectra and fluorescence spectra.The effects of pH and reaction time were investigated for the detection of Cr6+ ions in water.Under the optimal detection conditions,the results showed that the fluorescence quenching rate of CQDS showed a good linear relationship with the concentration of Cr6+ ions.The linear range of detection was 2.0~9.0μmol/L,the detection limit was 0.15μmol/L,and the spiked recovery rate was 94% to 102%.The method has achieved good results with high sensitivity and accuracy for the detection of Cr6+ ions.

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