一维纳米SnO2/TiO2复合薄膜电极的制备及光电性能

采用静电纺丝的方法，通过调节前驱体液中SnCl₂·2H₂O的质量分数，制备了直径为90~180nm的SnO₂纳米线，经TiCl₄溶液水解处理制备得到了SnO₂/TiO₂薄膜电极。使用SEM和EDS对薄膜电极进行表征，通过线性扫描伏安法和光电催化测试，分析研究了SnO₂/TiO₂ 纳米复合薄膜电极的光电化学性质。结果表明，当SnCl₂·2H₂O质量分数为3%时，SnO₂/TiO₂ 复合薄膜电极的光电流密度达到最大；随后将其与TiO₂、SnO₂薄膜电极相比，SnO₂/TiO₂ 复合薄膜电极产生的光电流明显增大；复合薄膜电极对罗丹明B（RhB）的光电催化降解率在90min后可达到95%，而TiO₂仅为56%、SnO₂为58%。

Preparation of one-dimensional SnO2/TiO2 composite film electrodes and their photoelectrocatalytic properties

Tin dioxide(SnO2) nanowires with diameters of 90-180 nm have been obtained using an electrostatic spinning technique by controlling the concentration of SnCl2·2H2O in the precursor solution.SnO2/TiO2 composite film electrodes were prepared after hydrolysis of TiCl4 solution.The resulting film electrodes were characterized by SEM and EDS.The photoelectrochemical properties of the SnO2/TiO2 composite film electrodes were studied using electrochemical techniques including linear sweep voltammetry and photoelectrocatalysis.The photoelectric properties of the SnO2/TiO2 composite film electrodes were optimized when using a SnCl2·2H2O concentration of 3% in the precursor solution.The photocurrent of the SnO2/TiO2 composite film electrode was significantly higher than those of pure TiO2 or SnO2 film electrodes.The photocatalytic degradation ratio of rhodamine B(RhB) with the composite film electrode was 95% after 90 min of irradiation,higher than the corresponding values for pure TiO2(56%) and SnO2(58%).