花团状纳米铜的制备和催化性能

Synthetic and catalytic properties of clocklike nano-copper

采用液相化学还原法,以六元瓜环(Q[6])为修饰剂,CuSO4·5H2O为铜源,抗坏血酸为还原剂制备纳米铜.采用X射线粉末衍射、扫描电镜及紫外-可见吸收光谱对产物进行结构和形貌表征.结果表明,产物纳米铜呈特殊的花团状结构,花团直径约为2.0μm.花团状纳米铜对染料罗丹明B和次甲基蓝的催化结果显示,在40℃和H2O2辅助下,60mg/L花团状纳米铜在120min内对罗丹明B和次甲基蓝的降解率大于83%.

Clocklike nano-copper were prepared by chemical reduction method in aqueous solu- tion with cucurbit[6]uril as modifier, CuSO4 · 5H2O as copper source and ascorbic acid as re- ducing agent. The structure, morphology and catalytic performance of nano-copper were char- acterized by X-ray diffraction （XRD）, scanning electron microscope （SEM） and UV-visible ab- sorption spectroscopy. The results show that the nano-copper is in a special structure of clock- like,whose diameter is about 2.0 μm. Under the presence of H2O2 and at 40 ℃, 60 mg/L clocklike nano-copper can catalyze more than 83% of rhodamine-B and methylene blue in 120 min.