Synthesis And Photocatalytic Properties Of Porphyrin Linear Polymers And Conjugated Microporous Polymers

Porphyrin compounds have unique light sensitivity,which can change oxygen from triplet state into singlet state in the presence of appropriate light and oxygen to make organic compounds occur photocatalytic oxidation and degradation.Porphyrin compounds have widely application prospect,as photocatalytic degradation catalysts of organic dyes.In this paper,we design and synthesize three types of heterogeneous photocatalyst of porphyrin,and hope to find an organic catalyst material,which is not only high efficient catalytic performance and controllable structure,but also stable and recycling.The synthesized three types of heterogeneous catalysts are linear porphyrin polymers,conjugated microporous porphyrin polymers and conjugated microporous porphyrin metal polymers.These heterogeneous catalysts are all obtained by aldehyde ammonia condensation reaction with Schiff base(-C=N-).The structure of these catalysts is characterized by FT-IR,UV-vis and NMR.The crystallization properties and morphologies of these catalysts are characterized by XRD and FE-SEM.In addition,the photocatalytic degradation and recycling performance for organic pollutants of these three heterogeneous catalysts have been studied by using RhB as a degraded organic dye.The results show that all of the three catalysts have excellent catalytic degradation ability and stability.And the secondary circulation experiments show that these three kinds of catalysts can be well recycled with maintained catalytic performance.Moreover,under the same experimental conditions,the conjugated microporous porphyrin metal polymers showed better catalytic degradation ability.