摘要
采用简单的电化学阳极氧化法在金属Ti表面制备了TiO2纳米管阵列薄膜,研究薄膜的表面形貌、晶相结构以及光吸收性质,考察其光电极的光电化学特性,结果表明,所制备的纳米管阵列膜结构高度有序,平均管径约90nm,管长约700nm。经过不同温度热处理后,薄膜结晶性质的重要性得到证实,600℃处理的光电极具有最优的光吸收和光电化学性质,最高光转化效率约1.07%。
Self-organized nanotube arrays were prepared by a facile electrochemical anodization on pure Ti in a 0.5wt% NH4F aqueous electrolyte. The surface morphology, structure, optical and photoelectrochemical behaviors of the nanotubular films were investigated. The as-formed nanotubes are highly ordered with ~700nm in length and the average tube diameter of about 90nm. By annealing the initially amorphous films at different temperatures, the importance of the crystalline nature is confirmed. The photoelectrochemical properties are investigated and the highest photoconversion efficiency of 1.07% is obtained with the annealing at 600 oC.
基金
河南省教育厅自然科学基金项目（2011B430005）
河南工业大学博士基金项目（2009BS032）
关键词
二氧化钛
纳米管阵列
阳极氧化
光电化学
titanium dioxide
nanotube arrays
anodization
photoelectrochemistry
