International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS) , 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan.
Research and Utilization Division, Japan Synchrotron Radiation Research Institute , 1-1-1 Kouto, Sayo-gun, Hyogo 679-5198, Japan.
ACS Appl Mater Interfaces. 2017 Jul 26;9(29):24538-24544. doi: 10.1021/acsami.7b04051. Epub 2017 Jul 11.
We report a methodology for creating protonated layered titanate-rutile heterojunctions on the outer particle surface of protonated layered titanate by treating layered potassium titanate (KTiLiO) with dilute HCl and then drying it at room temperature under reduced pressure. After Pt co-catalyst loading, this protonated layered titanate/rutile composite with heterojunctions showed higher photocatalytic H evolution activity from water under simulated solar light compared to that of Pt-loaded P25, the standard photocatalyst for this reaction. The high photocatalytic activity was ascribable to enhanced photocatalytic activity of the protonated layered titanate based on an efficient charge separation at the protonated layered titanate-rutile heterojunction in addition to the sensitization effects of rutile, which absorbs light with longer wavelengths compared to those of protonated layered titanate.
我们报告了一种通过用稀 HCl 处理层状钛酸钾（KTiLiO）然后在减压室温下干燥来在层状钛酸的外颗粒表面上形成质子化层状钛酸盐-锐钛矿异质结的方法。在负载 Pt 共催化剂后，与负载 Pt 的 P25（该反应的标准光催化剂）相比，具有异质结的这种质子化层状钛酸盐/锐钛矿复合材料在模拟太阳光下从水中显示出更高的光催化 H2 演化活性。高的光催化活性归因于质子化层状钛酸盐基于在质子化层状钛酸盐-锐钛矿异质结处的有效电荷分离的增强的光催化活性，以及锐钛矿的敏化效应，与质子化层状钛酸盐相比，锐钛矿吸收更长波长的光。
