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“变废为宝”：废弃松针变身“闪闪发光”磷光材料——本科生综合化学科普实验

龚帅, 贺进禄, 孟婷   

  1. 内蒙古大学化学化工学院, 内蒙古 呼和浩特 010021
  • 收稿日期:2026-07-13 录用日期:2026-08-24
  • 通讯作者: 贺进禄, 孟婷 E-mail:hejinlu@imu.edu.cn;t.meng@imu.edu.cn Jinlu He, Ting Meng
  • 基金资助:
    内蒙古大学2025年度校级大学生创新创业训练计划(202514250)

“Turning waste into treasure”: transforming discarded pine needles into “shimmering” room-temperature phosphorescent materials—a comprehensive chemistry popular science experiment for undergraduates

Shuai Gong, Jinlu He, Ting Meng   

  1. College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, Inner Mongolia Autonomous Region, China
  • Received:2026-07-13 Accepted:2026-08-24
  • Contact: Jinlu He, Ting Meng E-mail:hejinlu@imu.edu.cn;t.meng@imu.edu.cn

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摘要： 针对传统磷光材料热溶剂中稳定性差的难题，本研究响应“十五五”林业废弃物资源化政策，以内蒙古废弃林业资源松针为碳源，基于碳点(Carbon dots,CDs)的发光特性与层状水滑石(Layereddouble hydroxides,LDHs)的高温相变效应，设计并构建了一种新型CDs水滑石复合材料(CD@LDHs)。该材料不仅可实现高效的室温磷光发射，更能在高温液相环境中维持其磷光性能。具体而言，层状LDHs在加热过程中会发生逐步分解转变为更致密的氧化物相，相变产物能有效屏蔽外界氧和水分子，避免复合结构的损伤，进而维持了高温液相下的磷光输出。本实验将废弃松针“点石成金” ，既为开发环保型高稳定发光材料提供了新思路，又为本科生搭建了一个融合绿色化学理念、材料合成操作与荧光现象观察的综合性科普实践平台，有助于学生在动手实验中建立资源循环利用意识，感受化学的“神奇”与实用价值。

关键词: 碳点, 水滑石, 高温液相磷光, 松针废弃物, 绿色化学

Abstract: To overcome the poor stability of conventional phosphorescent materials in thermal solvents, this study aligns with the “15th Five-Year Plan” policy on the resource utilization of forestry waste. Using discarded pine needles from Inner Mongolia as the carbon source, and leveraging the luminescent properties of carbon dots(CDs)along with the high-temperature phase transition effect of layered double hydroxides(LDHs), we designed and constructed a novel CDs@LDHs composite. This material not only achieves efficient room-temperature phosphorescence emission but also maintains its phosphorescence performance in high-temperature liquid-phase environments. Specifically, the layered LDHs undergo gradual decomposition upon heating and transform into denser oxide phases. The resulting phase-transition products effectively shield against external oxygen and water molecules, preventing damage to the composite structure and thereby sustaining phosphorescence output under high-temperature liquid-phase conditions. This experiment turns discarded pine needles into treasure, offering a new strategy for developing environmentally friendly, highly stable luminescent materials. At the same time, it provides undergraduates with a comprehensive hands-on popular science practice platform that integrates green chemistry concepts, material synthesis operations, and fluorescence observation. It helps students develop an awareness of resource recycling through hands-on experiments and appreciate the “magic” and practical value of chemistry.

Key words: Carbon dots, Hydrotalcite, High-temperature liquid-phase phosphorescence, Pine needle waste, Green chemistry