12-钒钨酸基咪唑杂化化合物的水热合成、结构和降解罗丹明B的光催化性能研究

Crystal structure and catalytic activity of a hybrid compound based on 12-tungstovanadates and imidazoles

采用水热合成方法制备出了1个12-钒钨酸基咪唑杂化化合物(C3H5N2)4[VW12O40]·1.25H2O,并用IR、UV和X射线单晶衍射技术对其结构进行了表征.结构解析结果表明,该晶体属于三斜晶系,空间群为P1-,它是由[VW12O40]4-簇阴离子,质子化的咪唑和结晶水组成.将标题化合物制成碳糊电极,利用循环伏安法研究了其电化学行为及其对NO2-还原的电催化性能;以罗丹明B为模拟物,探究了该化合物的光催化活性.结果表明,用标题化合物修饰的碳糊电极对NO2-的还原具有良好的电催化效果;标题化合物作为光催化剂在降解罗丹明B反应中具有良好的可见光催化活性.

A hybrid compound based on 12-tungstovanadates and imidazoles has been hydrothermally synthesized and structurally characterized by IR,UV-Vis and singlecrystal X-ray diffraction.The title compound crystallizes in triclinic,P1-space group.It consists of [VW12O40]4-cluster anion,protonated imidazole and crystal water molecules.The title compound was made into carbon paste electrode and its electrocatalytic activity for reduction of NO-2 was investigated by cyclic voltammetry.Rhodamine B was choosen as the model pollutant to explore the photocatalytic activity of the title compound.All the experimental results show that carbon paste electrode modified by the title compound displays good electrocatalytic activity towards the reduction of NO-2,and the title compound as photocatalyst in the degradation of Rhodamine B exhibits good visible-light photocatalytic activity.