| Metal Organic Frameworks (MOFs) and Porous Organic Frameworks (POFs) are newly developed porous materials in the recent20years. MOFs and POFs have a specific large surface area; when the object molecules are removed, there will still remain permanent holes, there are a variety of MOFs and POFs, the structure can be designed and are partially adjustable. MOFs and POFs has become the hotspot in material science, and have broad applications in gas storage, gas separation, catalysis, drug delivery and etc.In this paper, in accordance with the trend, we creatively prepared four new Covalent Organic polymer materials (Covalent Organic Polymers, COPs) through copolymerization, and researched the application in carbon capture.The main content and innovation points as follows:1. We prepared four COPs with graphic topology tetrakis(4-bromophenyl)-[1,3,5] triazine and1,4-Dibromobenzene for COP-401, tetrakis(4-bromo phenyl)-[1,3,5] triazine and4,4’-Dibromobiphenyl for COP-402, tetrakis (4-bromophenyl)-[1,3,5] triazine and tris(4-bromophenyl)amine for COP-403, tetrakis(4-bromophenyl)-[1,3,5] triazine and1,3,5-tris-(4-bromophenyl) benzene for COP-404. A series of tests as nitrogen adsorption, solid nuclear magnetic, infrared spectrum test, SEM, TGA were done to characterize the COPs, the results show that COPs has large specific surface, strong thermal stability, specially tubular structure were found in COP-404.2. The four COPs materials, further we made the test on gas adsorption capacity, and the IAST theory were used to predict the selectivity of CO2for CO2/N2and CO2/CH4.The results showed that the COPs has a large BET surface area941m2·g-1, and have a relatively high CO2adsorption selectivity141in CO2/N2.Carbonized COP-404was prepared, and the adsorption ability was tested, results show that carbonization is beneficial to both gas uptakes, CO2gas uptake rised from49mg·g-1to112mg·g-1and N2gas uptake rised from2.24mg·g-1to19.05mg·g-1and gas adsorption selectivity. |
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