TiO_2纳米管阵列的多元改性及应用研究进展

Application and Research Progress of TiO_2 Nanotube Arrays with Multiple Modifications

TiO2纳米管阵列具有比表面积大、吸附能力强、载流子传输快等独特优势,已成为光电转换和光催化等诸多领域的研究热点,应用前景广阔。但是TiO2纳米管阵列也存在Ti O2的固有缺陷,其带隙较宽,只能吸收部分紫外光(λ<387nm);同时光生载流子容易复合,成为其实际应用的"瓶颈"。国内外围绕Ti O2纳米管阵列改性进行了大量研究,其中综合运用多种手段进行的多元改性取得了一定的成效。本文综合评述了TiO2纳米管阵列的多元改性及应用研究进展,分析了可能存在的问题,并展望未来的研究趋势。

Owing to some outstanding properties, such as large surface area, strong adsorption capacity, quick carrier transmission and so on, TiO2 nanotube arrays shows great potential applications which has become research focus in the field of photoelectric conversion, photocatalysis and other fields. Unfortunately, TiO2 nanotube arrays have the inherent defects of TiO2 which can be activated only by UV light of wavelength 〈387 nm because of its large band gap; moreover, photo-generated electrons and holes are easily to recombine, which restrict their use in practice applications. Extensive research from home and abroad have been devoted to modify TiO2 nanotube arrays, in which definite progress have been achieved by synthetically using various means to make multivariatmodification. This paper reviews multiple modification and applications of TiO2 nanotube arrays, and analyzes the problems might be existed and future research trends.