Cu_2O@ Cu纳米线的制备及对染料废水的脱色效能

Fabrication of Cu_2O@ Cu nanowires and its efficiency of decolorizing dye wastewater

利用化学沉积法制备铜纳米线,以铜纳米线为基质,在不同温度下水浴反应合成具有核壳结构的一维Cu_2O@ Cu纳米线。利用X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)、比表面积测试(BET)、紫外-可见光谱(UV-VISDRS)等分析手段,对所得材料的结构、形貌和光学性质进行表征。并考察了其对甲基橙的吸附性能和光催化性能。结果表明:合成的Cu_2O@ Cu纳米线对甲基橙取得了71.4%的吸附率和70.1%光催化脱色率,且Cu_2O@ Cu纳米线表面的纳米Cu_2O粒径过大或过小都将减弱其脱色性能,结晶性越好可增强其脱色性能,其粒径在30~34 nm范围内,脱色效能最佳。

Cu nanowires are fabricated by chemical deposition method. The obtained Cu nanowires are used as substrate in the preparation of one dimensional Cu_2O@ Cu nanowires with core-shell structure by the reaction of water bath at different temperatures. XRD,SEM,TEM,BET and UV-Vis DRS are used to characterize the crystalline structures,morphologies,specific surface area and optical properties of the obtained Cu_2O@ Cu nanowires. The adsorptive property and photocatalytic activity of Cu_2O @ Cu nanowires samples are investigated by using the adsorption and photodegradation of methyl orange. The results suggest that the adsorption rate of methyl orange reaches 71. 4% and photodegradation rate of methyl orange reaches 70. 1%. If the size of the nano Cu_2O particles is too large or too small,its adsorption capacity and photocatalytic activities will be weakened. Better crystallization can promote its adsorption and photocatalytic properties. The decolorization properties of methyl orange is the best as the size of the nano Cu_2O particles is between 30-34 nm. However,it shows no effect on methylene blue.