Chemical and electronic modifications and kinetic investigations on photocatalysts with defect-pyrochlore-structe for water splitting

将继续对Emmy-Noether项目迄今为止制备的所有材料进行彻底的动力学研究，以确定所得光催化剂的反应动力学，并实现材料，形态，结晶度和活性之间的相关性。基于Emmy-Noether-项目的先前结果，另外将制备具有定制的介孔和孔壁的优化的介孔光催化剂，其具有缺陷烧绿石结构，其将显著超过先前在该项目中制备的介孔和纳米颗粒缺陷烧绿石的制氢活性。这项研究的想法不是最初提交的项目的一部分，并提出了一个逻辑的发展基础上获得的知识，在埃米-诺特项目。因此，将通过水热合成制备CsTaWO 6的纳米颗粒，并随后在基于模板的合成中用作纳米颗粒构建块以制备介孔CsTaWO 6。通过选择所需的纳米颗粒尺寸，可以设定用于光催化析氢的最佳壁厚。这是不可能的，在以前的工作中的软和硬模板的CsTaWO 6。通过合适的模板，还应定制孔几何形状。

A thorough kinetic study on all materials prepared in the Emmy-Noether project so far will be continued, to identify the reaction kinetics of the resulting photocatalysts, and to achieve a correlation between material, morphology, crystallinity, and activity. Based on the previous results of the Emmy-Noether-project, additionally an optimized mesoporous photocatalyst with tailored mesopores and pore walls with defect-pyrochlore structure shall be prepared, which shall exceed the activity in hydrogen production of the previously in this project prepared mesoporous and nanoparticulate defect-pyrochlores significantly. This research idea was not part of the initially submitted project, and presents a logical development based on the knowledge gained in the Emmy-Noether project. Therefore, nanoparticles of CsTaWO6 will be prepared by hydrothermal synthesis, and subsequently used as nanoparticulate building blocks in a template-based synthesis to prepare mesoporous CsTaWO6. By choosing the desired nanoparticle size, the optimum wall thickness for photocatalytic hydrogen evolution can be set. This was not possible in previous work on soft- and hard-templating of CsTaWO6. By means of suitable templates, the pore geometry shall also be tailored.