The　main　objective　of　this　paper　is　to　decorate　carbon　multiwall　nanotubes　surface　with　TiO2,　ZnO　and　Al2O3　in　view　of　radical　catalytic　application　for　these　nanocomposites.　In　this　work　oxide　liquids　were　used　to　wet　the　surface　of　nanotubes　to　decorate　nanotubes.　Under　ionizing　irradiation　various　nanooxides　decorated　multiwall　carbon　nanotubes　shows　different　catalytic　activity.　The　results　showed　that　the　nanooxides　decorated　nanotubes　catalyzed　reactions　are　accelerated　more　by　the　decrease　in　decorated　nanotubes　concentration,　dose　and　pH.　Among　these　three　kinds　of　nanooxide　decorated　nanotubes,　nano-TiO2　decorated　multiwall　carbon　nanotubes　displayed　relatively　high　catalytic　activity.　(C)　2007　Elsevier　B.V.　All　rights　reserved.