Synthesis,characterization and catalytic degradation of dye waste water of Cd-based MOFs materials
Industrial wastewater treatment is of great significance for maintaining ecological balance and achie-ving sustainable development.Developing new removal agents with the feature of catalytic degradation of pollu-tants is an effective solution to the wastewater treatment.To address this,metal-organic frameworks(MOFs)with inherent characteristics of wide material sources and adjustable structures were proposed and demonstrated according to the principle of crystal engineering.Therefore,a MOF of[Cd(bpt)(H2O)4]n·n(pam)· 2nH2O(MOF-1)was prepared by using pamoic acid(H2pm)and 2,5-bis(4-pyridyl)-1,3,4-thiadiazole(bpt)as components.The structural analysis and physico-chemical characterization showed that MOF-1 possessed complex supramolecular network with one-dimensional covalent chain,the simple synthesis meth-od,good product quality,and the uniform morphology with the size of about 0.5～2 μm.The main frame-work of MOF-1 was thermostable till 3 10℃.The crystal products owned excellent chemical stability of not less than 60 days and 163 days in strong acid and neutral aqueous solution,respectively.Moreover,MOF-1 dis-played bright green fluorescence and could be used as a molecular luminescence thermometer over a wide tem-perature range.The catalytic degradation of organic dyes performed by MOF-1 in simulated industrial wastewater revealed that the materials had a narrow bandgap width Eg=2.85 eV and a large decolorization rate of Rhodamine B with 85.94％.Hence,MOF-1 is a brilliant wastewater treatment agent with greater com-parative advantages with lots of known materials.
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