NH2-UiO-66机械催化降解染料的性能研究

Degradation of Dye Wastewater over NH2-UiO-66:Piezoelectrically Induced Mechano-Catalytic Effect

作为类铁电材料,金属有机骨架材料的机械催化降解染料性能的研究还鲜有报道。本研究采用溶剂热法合成了氨基化的Zr基MOF材料NH2-UiO-66,并将其应用于以超声为机械振动源催化降解染料罗丹明B。结果表明:在超声振动5 h后罗丹明B的降解率可达80%,且NH2-UiO-66表现出良好的稳定性;自由基捕获实验表明超声机械振动可诱导NH2-UiO-66表面产生正负电荷,进而形成具有强氧化活性的羟基自由基来分解染料分子。将MOF材料的机械催化技术应用在染料废水处理具有潜在的价值。

Metal-organic frameworks(MOF)as piezoelectrical materials used in mechano-catalytic degradation of organic dye are rarely investigated.In this work,NH2-UiO-66 was synthesized by the solvothermal method and applied in mechano-catalytic degradation of Rhodamine B under ultrasonic vibration.The results show that NH2-UiO-66 behaves a high mechano-catalytic decomposition efficiency of 80%for Rhodamine B within 5 h vibration and possesses a good stability.The piezoelectrically induced electric charges on the surfaces of NH2-UiO-66 via the piezoelectric effect could induce hydroxyl radicals as strong oxidants to decompose Rhodamine B.The piezoelectrical effect of MOFs is potential in utilizing vibration energy for dye wastewater treatment.