To improve students'evidence awareness and comprehensive scientific research ability,a carbon dots-based composite material is obtained with strong fluorescence emission in solid state.Based on this material,a comprehensive and innovative experiment covering the synthesis of fluorescent composites,characterization,and the development of latent fingerprints is designed.Citric acid,triethylenetetramine and rhodamine 6G are used as raw materials to synthesize fluorescent carbon dots.The prepared carbon dots are further embedded in metal-organic frameworks through a self-assembly strategy to give rise to a solid emissive composite material.The composite material is characterized by scanning electron microscope,fluorescence spectrometer,powder X-ray diffractometer and other instruments.The prepared composite material is applied to develop latent fingerprints on different substrates by a powder-dusting method,and the developing performance is further analyzed and evaluated.The experiment is highly comprehensive and innovative,and the teaching content is closely linked with the academic frontier and practical application,which is conducive to improve problem-analyzing and solving abilities,and cultivate innovative scientific research spirit of students.
维普
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