Progress on CO2 capture by porous organic polymers

Carbon dioxide from the combustion of fossil fuels causes many environmental problems, so the capture of CO2 is especially important. Porous organic polymers (POPs) are regarded as a kind of excellent candidate for CO2 capture because of their high surface areas, suitable pore size, low cost, and good physicochemical stability. This review aims to summarize the development of CO2 capture by POPs, including hyper-crosslinked polymers, covalent organic frameworks, conjugated microporous polymers, and covalent triazine-based frameworks, in the last two years. The relationship between the characteristic features and CO2 uptake capability is described. The advantages and disadvantages of each type of POPs and their future challenges are also discussed.