化工进展 ›› 2023, Vol. 42 ›› Issue (11): 5852-5860.DOI: 10.16085/j.issn.1000-6613.2022-2346

• 材料科学与技术 • 上一篇    

生物质基碳量子点的绿色合成及其LED应用

曹瑾(), 朱玲莉, 沈德魁()   

  1. 东南大学能源热转换及其过程测控教育部重点实验室,江苏 南京 210096
  • 收稿日期:2022-12-21 修回日期:2023-02-21 出版日期:2023-11-20 发布日期:2023-12-15
  • 通讯作者: 沈德魁
  • 作者简介:曹瑾(1997—),女,硕士研究生,研究方向为生物质能高价值利用。E-mail:220200388@seu.edu.cn
  • 基金资助:
    江苏省重点研发计划(BE2020114)

Green synthesis of biomass-based carbon quantum dots and LED application

CAO Jin(), ZHU Lingli, SHEN Dekui()   

  1. School of Energy and Environment, Southeast University, Nanjing 210096, Jiangsu, China
  • Received:2022-12-21 Revised:2023-02-21 Online:2023-11-20 Published:2023-12-15
  • Contact: SHEN Dekui

摘要:

各类生态友好型生物质都可以作为绿色碳源制备新型零维碳纳米发光材料碳量子点(CQDs)。本文以农林废弃物、园林绿化垃圾、餐厨垃圾为原料,一步水热法制备生物质基CQDs。采用高分辨透射电镜、拉曼光谱、傅里叶红外光谱、X射线光电子能谱、紫外-可见光吸收光谱、荧光光谱等对各类CQDs进行表征分析,探究生物质种类对CQDs荧光性能的影响规律。实验结果表明:各类生物质基CQDs在紫外光激发下均发出蓝色荧光,农林废弃物制备的CQDs荧光量子产率(QY)普遍较低,鸡蛋壳、梧桐叶和柠檬皮基CQDs荧光QY分别达到9.29%、9.03%和4.51%,这三种生物质及制备的CQDs中均含有N或S元素,说明含有N或S元素的天然生物质有助于提高CQDs的荧光QY。将生物质基CQDs制作荧光粉,制成的发光二极管(LED)的光学性能指标与CQDs的荧光性能呈现出一定的映射关系,相关结论为生物质基CQDs的绿色合成及LED的绿色制备提供了有力指导。

关键词: 生物质, 纳米材料, 碳量子点, 荧光量子产率, 复合材料, 发光二极管

Abstract:

All kinds of eco-friendly biomass can be used as green carbon source to prepare carbon quantum dots (CQDs), a novel zero-dimensional carbon nano luminescent material. In this paper, biomass-based CQDs were prepared by one-step hydrothermal method using agricultural and forestry waste, garden and kitchen waste as raw materials. High resolution transmission electron microscopy, Raman spectroscopy, Fourier infrared spectroscopy, X-ray photoelectron spectroscopy, UV-visible absorption spectrum and fluorescence spectroscopy were used to characterize various types of CQDs, and to explore the influence of biomass on the fluorescence properties of CQDs. The experimental results showed that: All kinds of biomass-based CQDs emit blue fluorescence under UV excitation, and the fluorescence quantum yield (QY) of CQDs prepared by agricultural and forestry waste was generally low. The fluorescence QYs of CQDs prepared by egg shell, Chinese parasol leaves and lemon peel reached 9.29%, 9.03% and 4.51%, respectively. The three kinds of biomass and the prepared CQDs all contained N or S element. It showed that the biomass naturally containing N or S elements was helpful to improve the fluorescence QY of CQDs. By making phosphors from biomass-based CQDs, the optical properties of the light-emitting diode (LED) produced showed a certain mapping relationship with the fluorescence properties of CQDs. Relevant conclusions provide strong guidance for the green synthesis of biomass-based CQDs and the green preparation of LED.

Key words: biomass, nanomaterials, carbon quantum dots, fluorescence quantum yield, composites, light emitting diodes

中图分类号: 

京ICP备12046843号-2;京公网安备 11010102001994号
版权所有 © 《化工进展》编辑部
地址:北京市东城区青年湖南街13号 邮编:100011
电子信箱:hgjz@cip.com.cn
本系统由北京玛格泰克科技发展有限公司设计开发 技术支持:support@magtech.com.cn