基于科教融合的综合化学实验教学设计:银纳米材料的制备及催化性能

Comprehensive Chemistry Experimental Teaching Design Based on the Integration of Science and Education:Preparation and Catalytic Properties of Silver Nanomaterials

开展了研究型综合化学实验教学,将基础教学与科研训练有机结合,以和谐共进的方式加强人才培养效果,有助于推进教育教学改革进程。本实验利用简单的无机化学反应制备银纳米粒子,通过添加不同溴/银比例可调控银纳米胶体溶液颜色,将表面等离子体共振特性引入实验教学,提高了实验的趣味性。实验利用经典的对硝基苯酚催化反应模型验证银纳米粒子的化学活性,结果表明银纳米粒子催化效果良好,可近似为一级反应动力学过程。利用实验室常见的玻璃仪器搭建简易污染物降解反应器,使用自制载银滤纸实现了10次以上的循环降解,降解率可达90%。

This study implements research-oriented comprehensive chemistry laboratory teaching by combining fundamental education with scientific research training,thus enhancing talent development and promoting educational reform harmoniously.Silver nanoparticles were synthesized using straightforward inorganic chemical reactions,with the color of the resulting silver nanocolloid solution controlled by varying the bromine/silver ratio.This introduction of surface plasmon resonance characteristics into the experimental curriculum increases the experiment’s engagement.The chemical activity of the silver nanoparticles was verified using the classic p-nitrophenol catalytic reaction model.Results indicated that the silver nanoparticles exhibited excellent catalytic performance,approximating first-order reaction kinetics.Additionally,a simple pollutant degradation reactor was constructed using standard laboratory glassware,and homemade silver-embedded filter paper was used for over ten cycles of degradation,achieving a degradation rate of up to 90%.