A novel Sn-based dual ligand metal-organic framework photocatalyst(Sn-PTA-MI)is prepared via solvothermal method by using terephthalic acid(PTA)and 2-methylimidazole(2-MI)as competing ligands.The morphology,structure and energy band of the prepared photocatalyst are characterized by means of XRD,SEM,FT-IR,DRS and electrochemical test.Taking Rhodamine B,a cationic dye,as targeting pollutant,the effects of different factors on the photocatalytic activity of the photocatalyst are investigated.Results show that the removal rate of Rhodamine B exceeds 99％after 40 min of photocatalysis,and the reaction is less affected by pH when the molar ratio of PTA and 2-MI is 2:3 in the catalyst and the mass concentration of catalyst is 1.50 g·L-1.Main active groups involved in the catalytic degradation reaction are·O2-,followed by h+.
关键词
光催化/染料废水/双配体金属有机骨架/罗丹明B
Key words
photocatalysis/dye wastewater/dual ligand metal-organic framework/Rhodamine B
维普
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