Increasing　interest　has　been　devoted　to　synthesizing　graphene　(GR)-semiconductor　nanocomposites　as　photocatalysts　for　potential　applications,　which　is　very　similar　to　its　forebear　carbon　nanotube　(CNT)-semiconductor　photocatalysts.　Unfortunately,　a　thoughtful　and　inevitable　comparison　between　GR-　and　CNT-semiconductors　as　photocatalysts　is　often　neglected　in　literature.　This　situation　may　give　incomplete　or　exaggerated　information　on　the　contribution　role　of　GR　to　enhance　the　semiconductor　photocatalytic　activity,　as　compared　to　CNT.　Thus,　our　knowledge　regarding　the　specific　advantage　of　GR　over　CNT　on　how　to　design　more　efficient　GR-semiconductor　nanocomposites　and　understanding　the　origin　of　their　enhanced　photocatalytic　performance　is　far　from　satisfactory.　By　taking　the　TiO2　semiconductor　as　an　example,　we　conceptually　demonstrate　how　to　synthesize　a　more　efficient　GR-TiO2　nanocomposite　as　a　visible　light　photocatalyst　toward　selective　oxidation　of　alcohols　under　mild　conditions.　Comparison　between　GR-TiO2　and　CNT-TiO2　discloses　the　prominent　advantage　of　GR　over　CNT　on　both　controlling　the　morphology　of　GR-TiO2　nanocomposite　and　enhancing　the　photocatalytic　activity　of　TiO2.　This　work　clearly　highlights　the　importance　and　necessity　for　a　comparison　investigation　between　GR-　and　CNT-semiconductors　as　photocatalysts,　which　will　promote　our　in-depth　fundamental　understanding　on　the　analogy　and　difference　between　GR　and　CNT　on　controlling　the　morphology　of　GR　(or　CNT)-semiconductor　nanocomposites　and　enhancing　the　photocatalytic　performance.　Therefore,　we　appeal　the　photocatalysis　community　to　pay　attention　to　this　respect　rather　than　separately　imposing　hype　on　the　miracle　of　GR　in　much　the　same　way　as　its　carbon　forebears,　which　could　significantly　advance　our　rational　fabrication　of　smart　GR-semiconductor　nanocomposites　for　artificial　photosynthesis.　©　2011　American　Chemical　Society.