Ethyl　glycol　and　citric　acid,　along　with　metal　nitrates　have　been　used　to　prepare　Ce0.9Gd0.1O2-x　nanotubes　directed　at　the　anodic　alumina　oxide　(AAO)　template　by　combustion　route.　The　tubes　produced　by　the　self-combustion　route　do　not　need　any　further　calcination　step.　XRD　patterns　show　the　doped-ceria　tubes　have　the　flurite-type　structure　and　no　impurities　are　detected.　The　specific　surface　area　of　the　tube　is　112.7　m(2)　g(-1)　and　N-2　adsorption-desorption　profiles　of　the　BET　measurement　shows　the　tubes　are　mesoporous.　The　largest　aspect　ratio　of　a　nanotube　reaches　20:1　and　the　TEM　observation　reveals　the　hollow　structure.　The　Ce:Gd　molar　ratio　calculated　from　the　EDS　and　ICP-AES　is　9:1　and　the　selected　area　electron　diffraction　confirms　the　flurite-type　structure　from　the　XRD　characterization.　The　combined　thermogravimetry-differential　thermal　analysis　has　been　carried　out　to　study　the　combustion　reactions　in　the　tube-forming　process.　The　thermal　stability　of　the　nanotubes　under　both　reductive　and　oxidative　atmospheres　is　tested　using　the　dynamic　reduction/reoxidation　reactions.　At　last,　the　oxygen　storage　capacity　(OSC)　of　the　nanotubes　is　calculated　to　be　695　mu　mol-O-2　g(-1)　from　the　temperature-programed　reduction　reaction.　(C)　2010　Elsevier　B.V.　All　rights　reserved.