大学化学 >> 2025, Vol. 40 >> Issue (4): 375-381.doi: 10.12461/PKU.DXHX202406005

化学实验 上一篇    下一篇

水溶性荧光银纳米簇的制备与表征——材料化学实验的新设计与教学实践

陆峰, 王涛, 王其   

  1. 南京邮电大学材料科学与工程学院, 南京 210023
  • 收稿日期:2024-06-03 录用日期:2024-07-02 发布日期:2025-04-25
  • 通讯作者: 陆峰 E-mail:iamflu@njupt.edu.cn
  • 基金资助:
    南京邮电大学教学改革研究项目(JG0319JX27, JG03023JX103)；国家自然科学基金项目(21975131)

Preparation and Characterization of Water-Soluble Silver Nanoclusters: A New Design and Teaching Practice in Materials Chemistry Experiment

Feng Lu, Tao Wang, Qi Wang   

  1. School of Materials Science and Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
  • Received:2024-06-03 Accepted:2024-07-02 Published:2025-04-25
  • Contact: Feng Lu E-mail:iamflu@njupt.edu.cn

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摘要： 以聚甲基丙烯酸钠为稳定剂，通过加热或光照的方式还原银离子，在水溶液中制备具有荧光性质的银纳米簇，通过乙醇沉淀法获得银纳米簇粉体，并使用紫外-可见分光光度计及荧光光谱仪对其光学性质进行表征。本实验利用银纳米簇形成过程中的颜色变化，使纳米尺度上的反应过程“可视化”，帮助学生更加直观地理解反应过程和光谱数据。本实验立足材料化学基础知识，取材于科学研究前沿，在巩固基础知识的同时开阔了学生的视野，能够激发学生的科研热情，培养学生的实验技能和创新能力。

关键词: 银纳米簇, 荧光, 光谱表征, 实验教学

Abstract: Silver nanoclusters with fluorescent properties were prepared in aqueous solution using poly(methacrylic acid, sodium salt) as a stabilizer. The reduction of silver ions was achieved through heating or light irradiation. The silver nanoclusters were subsequently obtained in powder form using ethanol precipitation method. The optical properties of these silver nanoclusters were characterized using UV-visible spectroscopy and fluorescence spectrophotometry. The experiment leveraged the color changes observed during nanocluster formation to visualize the nanoscale reaction process, aiding students in developing an intuitive understanding of both the reaction mechanisms and spectral data. Grounded in fundamental materials chemistry knowledge and incorporating cutting-edge scientific research, this experiment not only reinforces basic concepts but also broadens students’ perspectives. Moreover, it stimulates their enthusiasm for scientific research while nurturing their experimental skills and fostering innovative abilities.

Key words: Silver nanoclusters, Fluorescence, Spectroscopic characterization, Experimental teaching