Preparation Of Porphyrin-based MOFs/GO Composites And Study On The Removal Of Pollutants From Water

With the development of society and the progress of industry,solving the problem of water pollution is a major challenge at present.Finding low-cost,simple to operate,and efficient adsorbents and high-efficiency,stable,and low-cost photocatalysts is an important measure to alleviate energy and environmental problems.In this paper,metal porphyrin framework materials PCN-222,PCN-222（Zn）,and PCN-222（Cu）were selected as the main body of adsorbent and photocatalyst,and were respectively compounded with graphene oxide to obtain composite materials.On the basis of efficient adsorption effects,efficient catalytic degradation of refractory substances in wastewater under visible light was achieved,and the catalytic effects under different conditions were explored.The specific content of this paper is as follows:1.Firstly,porphyrins were synthesized from simple compounds using through Adler reaction,and the coordination ions in the porphyrin center were adjusted to obtain two metal porphyrins,Zn TCPP and Cu TCPP;Three porphyrin-based metal organic framework materials,PCN-222,PCN-222（Zn）,and PCN-222（Cu）,were prepared with porphyrin compounds,zirconium tetrachloride/zirconium oxychloride,and benzoic acid/formic acid using DMF as solvent.Porphyrins and porphyrin framework materials were characterized by XRD,SEM,FTIR,etc.The characterization results can prove that the target products have been synthesized successfully.The fluorescence spectra show that Zn TCPP and PCN-222（Zn）have good optical properties,and Cu TCPP and PCN-222（Cu）undergo fluorescence quenching.2.Three composite materials,PCN-222/GO,PCN-222（Zn）/GO,and PCN-222（Cu）/GO,were prepared by in-situ synthesis.The morphology and thermal stability of the composite materials were studied by SEM and TG.3.The synthesized PCN-222,PCN-222（Zn）,PCN-222（Cu）,PCN-222/GO,PCN-222（Zn）/GO,and PCN-222（Cu）/GO were used to degrade methylene blue,respectively.It was found that the adsorption effect of PCN-222 was the best,and the photocatalytic effect of composite material PCN-222（Zn）/GO was the best.4.Study on the catalytic degradation of two cephalosporins,cefuroxime sodium and cefoperazone,using composite materials.Several factors affecting the catalytic degradation of cephalosporins by composite materials were studied.The results showed that the prepared composite materials had good catalytic effects under the conditions of a catalyst of 10 mg and a low concentration of the degradation solution,and the addition of H₂O₂ solution improved the photocatalytic effect of the composite materials.