大学化学 >> 2021, Vol. 36 >> Issue (8): 2009038.doi: 10.3866/PKU.DXHX202009038

化学实验 上一篇    下一篇

荧光碳点的制备及其荧光特性的研究和应用

杨雅儒, 陆沣, 胡敏(), 吴宥伸, 向丹, 高培红, 张雯   

  • 收稿日期:2020-09-16 录用日期:2020-12-14 发布日期:2020-12-28
  • 通讯作者: 胡敏 E-mail:koudai.1@163.com
  • 作者简介:胡敏, Email: koudai.1@163.com

Preparation and Application of Fluorescent Carbon Dots

Yaru Yang, Feng Lu, Min Hu(), Youshen Wu, Dan Xiang, Peihong Gao, Wen Zhang   

  • Received:2020-09-16 Accepted:2020-12-14 Published:2020-12-28
  • Contact: Min Hu E-mail:koudai.1@163.com

摘要:

围绕具有优良荧光发光特性的无机纳米材料——碳点,设计一个本科化学实验。通过“自下而上”的方法分别制备蓝色、绿色荧光碳点溶液;考察荧光碳点溶液的荧光激发和发射光谱关系,相对法测定荧光量子产率;探究不同浓度和pH条件下的荧光光谱变化;并将荧光碳点应用到防伪技术领域,加深学生对荧光材料的相关荧光概念和表征手段如荧光激发光谱、荧光发射光谱、荧光量子产率,术语如Stokes位移和荧光影响因素等理论知识的理解,同时通过防伪应用开拓学生的思维,鼓励学生将课堂所学应用到实际生产生活中。

关键词: 荧光碳点, 荧光量子产率, Stokes位移, 荧光光谱, 荧光墨水

Abstract:

The paper designed a chemical experiment based on carbon dots which own excellent fluorescence properties. Students need to synthesize blue and green carbon dots through "bottom-up" method, search the relationship between fluorescence excitation spectra and fluorescence emission spectra, measure the fluorescence quantum yield by comparing with a reference fluorophore, explore the changes of fluorescence spectra at different concentrations and pH, and apply the carbon dots to anti-counterfeit materials. All these will make students have a good command of fluorescence principle, such as fluorescence excitation spectrum, fluorescence emission spectrum, fluorescence quantum yield, Stokes shift and the factors that influence fluorescence. We also encourage students to apply the knowledge they have learned to their daily life.

Key words: Fluorescent carbon dots, Fluorescence quantum yield, Stokes shift, Fluorescence spectrum, Fluorescence ink

MSC2000: 

  • G64