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采用加热氧化多孔Sn--Cu合金电沉积层,制备得多孔SnO2--Cu2O复合薄膜.应用X射线衍射(XRD)、扫描电子显微镜(SEM)和X射线能量散射(EDS)分析了镀液中Sn2+/Cu2+值对薄膜结构、形貌和组成的影响.通过低压汞灯下光降解罗丹明B的反应测试了薄膜的光催化活性.结果表明,从0.01mol.L-1CuSO4、0.05mol.L-1SnSO4、1.5mol.L-1H2SO4、7mL.L-1甲醛和0.001%聚乙二醇辛基苯基醚(OP)的镀液中,在20℃以6.0A.cm-2的电流密度沉积得到的Sn--Cu合金,经过在空气气氛下200℃,2h和400℃,2h加热氧化后,转变为Sn/Cu值为3∶1的SnO2--Cu2O复合薄膜,显示出优异的光催化降解罗丹明B的活性,这归因于薄膜具有三维多孔的形貌和适合的Sn/Cu比.
Porous SnO2 - Cu2O composite films were prepared by heating oxidized porous Sn - Cu alloy electrodeposited coatings. The properties of the porous SnO2 - Cu2O composite films were analyzed by X - ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X - ray spectroscopy (EDS) Sn2 + / Cu2 + on the structure, morphology and composition of the film.The photocatalytic activity of the film was tested by photodegradation of rhodamine B under a low pressure mercury lamp.The results showed that from 0.01mol.L-1CuSO4,0.05mol.L -1 SnSO4, 1.5 mol. L-1H2SO4, 7 mL. L-1 formaldehyde and 0.001% polyethylene glycol octylphenyl ether (OP) at a current density of 6.0 A.cm "2 The obtained Sn - Cu alloy was transformed into a SnO2 - Cu2O composite film with a Sn / Cu value of 3:1 by heating at 200 ℃ for 2h and 400 ℃ for 2h in an air atmosphere, which showed excellent photocatalytic activity Degradation of rhodamine B activity, due to the film has a three-dimensional porous morphology and suitable Sn / Cu ratio.