介孔TiO_2的制备及染料敏化光催化制氢性能研究

Synthesis Mesoporous Dye-sensitized TiO_2 and the Performance of Photocatalytic Generating Hydrogen under Visible Light

文章利用CTAB为模板剂,以水热法制备介孔TiO2。并用虎红(Rosebengal)进行染料敏化制备了具有可见光活性的光催化剂,分别运用UV-Vis、XRD、FT-IR和BET等手段对催化剂进行了表征,通过光解水制氢为反应模型考察了所制备催化剂的光催化活性。结果表明:用该方法合成的介孔TiO2具有较高的比表面和催化活性,活性顺序为:介孔TiO2>P25>溶胶凝胶制备的TiO2(500℃煅烧)。

CTAB was used as template to systhesis mesoporous Titanium Dioxide by the method of hydrothermat. Rose bengal was used as dye-sensitizer to prepare photocatalytic catalyst which had photocatalytic activity under visible light. The samples were characterized by UV-Vis, XRD, FT-IR and BET method respectively. The photocatalytic activities of prepared samples were investigated by photocatalytic decomposition of water into hydrogen. The results indicated that the as-preoared TiO2 had higher surface area and higher photocatalytic activity, activity order：mesoporous TiO2〉P25〉sol-gel TiO2（calcined at 500 ℃）.