Preparation of Porphyrin Polymer and Its Adsorption and Degradation of Methylene Blue
Three Schiff base metalloporphyrin covalent organic frameworks(PPDCOF-Cu,DABCOF-Cu,NDACOF-Cu)were synthesized using 5,10,15,20-tetra(4-(4-formyl)phenoxy)phenylcopper porphyrin(TTPP-Cu)as precursor and p-phenylenediamine,biphenylamine,and 1,5-naphthalene diamine as connecting units.The structures and microstructures of the precursor and COFs were characterized by UV-Vis spectroscopy,Fourier transform infrared spectroscopy,powder X-ray diffraction,N2 adsorption-desorption test,and scanning electron microscopy.Methylene blue(MB)was selected as the model pollutant to investigate the adsorption and photocatalytic ability of three COFs,and their catalytic mechanism was explored.The results showed that DABCOF-Cu exhibited good photocatalytic ability,with a removal rate of 92.75％for MB.After 5 cycles,the removal rate remained above 90％.During the catalytic process,both·O2-and·OH participated as active substances in dye degradation.
万方数据
维普
