Synthesis Of Al-MOFs Materials And Their Application For Environmental Purification

Metal-organic Frameworks?MOFs?is a kind of coordination polymer,it is composed of inorganic metal ions or metal clusters combined with organic ligand.Recently,MOFs have been attracted more and more attention in many fields,such as in store separation,sensor,ion exchange,adsorption and catalytic,because of its large specific surface area,high porosity and adjustable pore size.At present,researchers of various fields take a widely attention on design,synthesis,structure and performance MOFs materials.The main contents are described as follows:?1?In chapter 1,the synthesis and morphology of MIL-96,and their application for environmental purification were summarized.?2?The effect of experimental condition,such as the reaction time and temperature and the concentration of materials,have been studied systematically on the formation of Al-MOFs.This study reports the facile synthesis of Al-MOFs with different morphologies,such as cylindrical rod,nanosheets and olive.?3?MIL-96,Al-BTC MOFs and MIL-53?Al,Fe?can be synthesized by a facile hydrothermal and solvothermal method.The as-obtained products were characterized by FR-IR,XRD,SEM,BET,and TG-DSC.In the present study we investigate the adsorption of CR on the MIL-96,Al-BTC MOFs and MIL-53?Al,Fe?.Pseudo-first-order,pseudo-second-order and intraparticle diffusion models were used to fit the experimental data,the thermodynamic parameters such as?G*,?H*and?S*have also been evaluated,the experimental data were analyzed by Langmuir,Freundlich,Temkin and Dubinin-Radushkevich adsorption isotherms,and the adsorption mechanism has been investigate.It was shown that the adoption capacity of MIL-53?Al,Fe?are greater than those of MIL-96 and Al-BTC MOFs.By the calculation of Langmuir isotherm model,the adsorption capacity of MIL-96,Al-BTC MOFs and MIL-53?Al,Fe?of CR is 100,390.62,568.16 mg·g^-1.?4?Doping Ag nanoparticls and MIL-96 composite photocatalysts were prepared with facile photocatalytic reduction method.These photocatalysts were characterized by FR-IR,XRD,SEM,HRTEM,XPS and UV-DRS.The as-prepared Ag@MIL-96 photocatalytic properties were investigated though the photocatalytic degradation of the RhB which is one of organic.The results showed that AgNPs doped MIL-96 with a concentration of 0.1%shown the best performance for photodegradation of RhB.According to the results of the photocatalytic degradation on RhB,the mechanism of photocatalytic degradation under visible light irradiation shown the·O₂^-and h⁺might be the main active species in RhB photodegradation,and the·OH^-is also partly involved in the process of photocatalytic degradation.