杂多蓝在可见光照射下对TiO_2的光敏作用研究

Photosensitization of Heteropoly Blue for TiO_2 under Visible Light Irradiation

利用磷钨酸、硅钨酸经光还原后制得的杂多蓝对Pt/TiO2进行了光敏化.所制备的催化剂在可见光区对光催化还原水产氢反应具有较高活性.当以丙三醇为电子给体时,该催化剂在可见光区(650～700nm)制氢反应的表观量子效率最高可达3.4%.

Heteropoly acid such as phosphotungstic acid or silicotungstic acid was photoreduced to heteropoly blue in glycerol aqueous solution. Sensitization of Pt/TiO2 by the heteropoly blue was found to be active for hydrogen generation under visible light irradiation. The apparent quantum yield of 3.4% for the photocatalytic hydrogen generation has been achieved with glycerol as an electron donor under 650-700 nm visible light.