采用简单的溶胶凝胶阳极氧化铝模板法制备了ITO纳米管。通过FE-SEM、HRTEM、XRD对其微观形貌、结构、相组成等进行了表征和分析,并测试了其对H2的气敏特性。结果表明,所得纳米管是由10～20nm晶粒组成的多晶结构,壁厚约为25nm,平均直径约250nm,与AAO(Anodic Aluminum Oxide)模板的直径相同。产物在550℃热处理后为立方铁锰矿结构的In2O3,Sn4+已经掺杂到In2O3的晶格中。所得ITO纳米管常温下对氢气具有较好的敏感性及稳定性。 ITO nanotubes were prepared by a simple sol-gel anodic alumina template method. The microstructure, structure and phase composition were characterized and analyzed by FE-SEM, HRTEM and XRD. The gas sensing properties of H2 were also tested. The results show that the obtained nanotubes have a polycrystalline structure composed of 10-20 nm crystal grains with a wall thickness of about 25 nm and an average diameter of about 250 nm, which is the same as that of the AAO (Anodic Aluminum Oxide) template. After heat treatment at 550 ℃, the product is cubic bixbyite In2O3, Sn4 + has been doped into the In2O3 crystal lattice. The obtained ITO nanotubes have good sensitivity and stability to hydrogen at room temperature.