The Synthesis And Photoelectric Properties Of Novel Triazinyl Organic Framework Polymers

In today's era,energy and environmental problems are becoming increasingly serious.We hope to develop new catalysts to reduce the content of CO₂ in the atmosphere and convert it into CO,H₂ and other fuels,so as to contribute to solving the energy shortage and greenhouse effect.The triazine-based organic framework compound material is a porous polymer material synthesized by a series of organic synthesis reactions using trimethyl-s-triazine as the raw material.It has the characteristics of rigidity of inorganic materials and flexibility of organic materials,and has very important contributions in various fields,especially in gas storage,photoelectricity and catalysis.In this paper,based on triazine-containing,two new organic polymer materials:Covalent Organic Framework(COF)and Metal Organic Framework(MOF)were synthesized,and X-ray single crystal diffraction,X-ray powder diffraction,fluorescence spectroscopy,ultraviolet-visible absorption spectroscopy,infrared spectroscopy,hydrogen nuclear magnetic resonance spectroscopy,N₂ adsorption,Scanning electron microscopy,gas chromatography,thermogravimetry and other characterization methods analyzed and studied the structure and properties of two organic framework polymer materials.This article is divided into five chapters:Chapter 1:Explains the development history and introduction of organic framework materials,and further elaborates from the synthesis and application of COF and MOF.Chapter 2:Successfully synthesized trimethyl-s-triazine by organic reaction,and successfully synthesized MOF and COF materials with organic ligands containing trimethyl-s-triazine.The characterization methods of organic skeleton materials are briefly introduced.Chapter 3:Successfully synthesized a pyridine-containing triazine MOFmaterial(TVPT-MOF),and used g-C₃N₄ as a carrier to dope MOF composite materials with different proportions.Through gas chromatography to carry out CO₂ reduction test,we found that TVPT-MOF@g-C₃N₄-10 has the strongest photocatalytic ability,and tests such as N₂ adsorption and band structure also prove this.And briefly explain the photocatalytic mechanism through theoretical calculations.Chapter 4:Two COF were synthesized using trimethyl-s-triazine as raw materials,and their photocatalytic ability was tested and routinely characterized.We found that the photocatalytic ability of COF-2 is significantly stronger than that of COF-1.Chapter 5:Conclusion,summarizes the research work.We improved the photocatalytic capacity by combining with bromine atom and introducing bromine atom,which was verified by experiments and theoretical calculations.I hope to provide new ideas for the improvement of photocatalysis in the future,and make my own contribution to alleviating energy shortage and greenhouse effect and other problems.