多孔SnO_2-Cu_2O复合薄膜的制备及其光催化性能  

Preparation and photocatalytic activity of coupled SnO_2-Cu_2O porous films

作　　者：徐彬[1] 李小辉[1] 童晓静[1] 牛振江[1] 冷文华[2] 张鉴清[2] 

机构地区：[1]浙江师范大学物理化学研究所浙江省固体表面反应化学重点实验室,金华321004 [2]浙江大学化学系,杭州310027

出　　处：《北京科技大学学报》2010年第12期1580-1585,共6页Journal of University of Science and Technology Beijing

基　　金：浙江省自然科学基金资助项目(No.Y404028)

摘　　要：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 through thermal oxidation of porous Sn-Cu alloy electrodeposits in air.The effects of the Sn2＋/Cu2＋ molar ratio of solutions on the morphologies,constituents and structures of coupled SnO2-Cu2O porous films were investigated by scanning electron microscopy（SEM）,energy dispersive X-ray spectroscopy（EDS）and X-ray diffraction（XRD）analysis.And the photocatalytic activity of the films was tested by photodegradation of rhodamine B under irradiation of a low-pressure mercury lamp.The results indicate that a coupled SnO2-Cu2O porous film with a Sn∶Cu ratio of 3∶1 has the best photocatalytic activity for degradation of rhodamine B.The film was prepared by electrodepositing a Sn-Cu alloy in a solution containing 0.01 mol·L^-1 CuSO4,0.05 mol·L^-1 SnSO4,1.5 mol·L^-1 H2SO4,7 mL·L^-1 formaldehyde and 0.001% polyethyleneglycol octyl phenyl ether（OP）at 6.0 A·cm^-2 and 20 ℃,then heating the Sn-Cu alloy at 200 ℃ for 2 h followed by 400 ℃ for 2 h in air.The reason for a higher photocatalytic activity of the film may be its three-dimensional porous morphology and proper Sn/Cu ratio.

关 键 词：氧化物 多孔材料 薄膜 电沉积 光催化 

分 类 号：TQ153.2[化学工程—电化学工业] O646.5[理学—物理化学]