Based on multi-walled carbon nanotubes (MWNTs) treated by NaOH solution and mixture acid of concentratedsulfuricacid and concentrated nitric acid, MWNTs/indium oxide composite powders were prepared by co-deposition method and followed heat treatment, and phase and morphology were characterized by X-ray diffraction and electron microscopy. The results show that there are many oxygenated functional groups on MWNTs surface after it was treated by NaOH solution and mixture acid, and specific surface area of MWNTs was increased significantly. Furthermore, MWNTs could load indium oxide nanoparticles after the MWNTs/indium hydroxide precursor was calcined and the effect was best after the precursor was calcined at 450℃, and indium oxide nanoparticles with diameter of 20-30 nm were coated on MWNTs surface.%在NaOH溶液活化、混合酸(浓硫酸和浓硝酸混合)处理多壁碳纳米管(MWNTs)的基础上,利用共沉淀法和后续热处理制备了多壁碳纳米管/氧化铟复合粉体,并使用X射线衍射仪和电子显微镜表征了复合粉体的物相和形貌.结果表明:NaOH和混合酸处理能在多壁碳纳米管表面引入丰富的羟基和羧基等官能团,且大大提高了碳纳米管的比表面积；煅烧多壁碳纳米管/氢氧化铟前驱体后,能够得到负载纳米氧化铟的多壁碳纳米管,其中450℃煅烧的效果最好,粒径为20～30 nm的纳米氧化铟颗粒均匀覆盖在碳纳米管表面上.
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