Abstract: Carbon nanotubes（CNTs）were firstly hydroxylated with Fenton reagent.Then the Fe³⁺ in the obtained mother liquor was directly converted into the precursor of ferric oxide（Fe₂O₃） with ammonia，sodium carbonate，and urea as precipi- tants，respectively.Different hydroxylated CNTs/Fe₂O₃ compound particles were finally obtained after calcined at 350 ℃.The morphology，thermal decomposition mechanism，and phase structure of the compound particles were characterized by SEM， TG-DSC，and XRD，respectively.In addition，their electrical conductivities were also investigated.Results showed that Fe₂O₃ in those compound particles had high purity and integrated crystalline structure; for ammonia precipitant，the α-Fe₂O₃ particles with crystallite size of 36.9 nm were obtained，and the compound particles were agglomerated to some certain extent with volume resistivity of 4.8×105 Ω·cm；for sodium carbonate precipitant，γ-Fe₂O₃ particles with crystallite size of 28 nm were obtained，and the compound particles were drastically agglomerated with volume resistivity of 5.1×105 Ω·cm；for urea precipitant， α-Fe₂O₃ with crystallite size of 50.3 nm was obtained，and the compound particles were homogeneous with volume resistivity of 100 Ω·cm.

Key words: carbon nanotube, hydroxylation, ferric oxide, compound particles