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通过阳极氧化法制备TiO2纳米管阵列(TNTA),静态下采用电化学方法在TNTA表面修饰聚吡咯(PPy)。并用扫描电子显微镜(SEM)、红外透射光谱(FTIR)、紫外可见漫反射吸收光谱(UV-Vis)等表征手段对复合材料进行表征。结果显示,PPy和TiO2之间存在强烈的相互作用,PPy修饰的TNTA发生了红移,并且增强了其在整个可见光区的吸收。确定了影响PPy/TNTA复合电极光电性能的因素(聚合时间、聚合温度、聚合电位、电解质浓度等),通过测定连续瞬间电流-时间曲线的方法,考察了制备条件对复合材料光电性能的影响。初步探讨出PPy提高TNTA光电性能的机理。
The TiO2 nanotube array (TNTA) was prepared by anodic oxidation and the polypyrrole (PPy) was modified by electrochemical method on the surface of TNTA. The composites were characterized by SEM, FTIR and UV-Vis. The results show that there is a strong interaction between PPy and TiO2, PPy modified TNTA redshift, and enhance its absorption in the visible region. The factors influencing the photoelectric properties of the PPy / TNTA composite electrode (polymerization time, polymerization temperature, polymerization potential and electrolyte concentration) were determined. The effect of preparation conditions on the photoelectric properties of the composite was investigated by measuring the current-time curve. The mechanism of PPy improving the photoelectric properties of TNTA was preliminarily discussed.