The　synthesis　of　a　new　type　of　solid　superacid　material　with　highly　ordered　mesoporous　structures　was　analyzed　and　its　use　as　photocatalysts　was　investigated.　The　material　was　obtained　by　reacting　a　cubic　mesoporous　amorphous-TiO2　film　with　sulfuric　acid　at　high　temperatures.　The　strength　of　the　acidic　sites　was　also　measured　using　the　Hammett　indicator　method.　The　results　indicate　that　an　increase　in　either　the　electron-hole-pair　lifetime　or　the　interfacial　charge-transfer　rate　results　in　high　quantum　efficiencies.