A　series　of　TiO2-graphene　(GR),　-carbon　nanotube　(CNT),　and　-fullerene　(C-60)　nanocomposite　photocatalysts　with　different　weight　addition　ratios　of　carbon　contents　are　synthesized　via　a　combination　of　sol-gel　and　hydrothermal　methods.　Their　structures　and　properties　are　determined　by　the　X-ray　diffraction　(XRD),　UV-vis　diffuse　reflectance　spectra　(DRS),　transmission　electron　microscopy　(TEM),　nitrogen　adsorption-desorption,　and　photoelectrochemical　measurements.　Photocatalytic　selective　oxidation　of　benzyl　alcohol　to　benzaldehyde　is　employed　as　a　model　reaction　to　evaluate　the　photocatalytic　activity　of　the　TiO2-carbon　(GR,　CNT,　and　C-60)　nanocomposites　under　visible　light　irradiation.　The　results　reveal　that　incorporating　TiO2　with　carbon　materials　can　extend　the　adsorption　edge　of　all　the　TiO2-carbon　nanocomposites　to　the　visible　light　region.　For　TiO2-GR,　TiO2-CNT,　and　TiO2-C-60　nanocomposites,　the　photocatalytic　activities　of　the　composites　with　optimum　ratios,　TiO2-0.1%　GR,　TiO2-0.5%　CNT,　and　TiO2-1.0%　C-60,　are　very　close　to　each　other　along　with　the　irradiation　time.　Furthermore,　the　underlying　reaction　mechanism　for　the　photocatalytic　selective　oxidation　of　benzyl　alcohol　to　benzaldehyde　over　TiO2-carbon　nanocomposites　has　been　explored　using　different　radical　scavenger　techniques,　suggesting　that　TiO2-carbon　photocatalysts　follow　the　analogous　oxidation　mechanism　toward　selective　oxidation　of　benzyl　alcohol.　The　addition　of　different　carbon　materials　has　no　significant　influence　on　the　crystal　phase,　particle　size,　and　the　morphology　of　TiO2.　Therefore,　it　can　be　concluded,　at　least　for　nanocomposites　of　TiO2-carbon　(GR,　CNT,　and　C-60)　obtained　by　the　present　approach,　that　there　is　no　much　difference　in　essence　on　affecting　the　photocatalytic　performance　of　semiconductor　TiO2　among　these　three　different　carbon　allotropes,　GR,　CNT,　and　C-60.　Our　findings　point　to　the　importance　of　a　comparative　study　of　semiconductor-carbon　photocatalysts　on　drawing　a　relatively　objective　conclusion　rather　than　separately　emphasizing　the　unique　role　of　GR　and　joining　the　graphene　gold　rush.