由于纳米TiO2材料具有无毒、气敏、湿敏、稳定性好等优点而被广泛应用于太阳能电池、光催化降解和气体传感器等领域中。TiO2纳米管是典型的一维纳米材料，拥有丰富的物理化学性质。由于其制备成本不高，因此蕴藏着广阔的应用前景。特别是近年的研究表明，TiO2纳米管因为其大的比表面积、强的吸附能力和纳米尺寸效应，在光催化、传感器、太阳能电池等领域有巨大的开发潜力，已成为目前纳米材料的研究热点之一。TiO2纳米管的主要制备方法基本成熟，但在气体传感器中的研究比较少。TiO2纳米管的制备是在各领域应用的重要前提，因此，本文先介绍它的主要制备方法，从而了解TiO2纳米管的形态及组成，而在其众多应用中，着重介绍它在气体传感器中应用的研究现状。
TiO2 is widely used in the production of gas-sensor, solar cell and potocatalytic degradation, due to its good stability, non-poisonous nature and strong sensitivity to gas and wettability. TiO2 nanotubes are typical one-dimensional nanomaterials with relatively extensive chemical and physical properties. As the production cost is low, it has a wide application prospect. In particular, recent studies suggest that compared with other forms of nano-materials, it has a larger specific surface area, stronger adsorbability and good nanometer size effects. TiO2 nanotubes have a great potential in fields of photocatalysis, sensors, solar cells and others and have attracted much research interest. Although the production of TiO2 is a mature technology, its application in the field of gas-sensors remains an issue to explore. The preparation of TiO2 nanotubes is the important prerequisite for its application in various fields, so main preparation methods of TiO2 nanotubes firstly are discussed in this paper to understand the shape and general components of TiO2 nanotubes. The application of TiO2 nanotubes in gas sensors is specifically addressed among its many applications.
