Novel TiO2 films with organized porosity and tailored doping as efficient visible light photocatalysts

具有有序孔隙度和定制掺杂的新型 TiO2 薄膜作为高效可见光光催化剂

• 批准号: 39338352
• 负责人: Professor Dr. Detlef Bahnemann
• 金额: --
• 依托单位: Institut für Technische Chemie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2007
• 资助国家: 德国
• 起止时间: 2006-12-31 至 2011-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/39338352?language=en
• 关键词: Novel; TiO2; films; organized; porosity

Ordered porous films of TiO2 with strictly controlled morphological properties (hierarchical micro/meso/macroporosity, film thickness) and structure (crystallinity) will be prepared by the evaporation-induced self-assembly method. The incorporation of metal ions, sulphur dopants, nanoparticles of metals (Pt, Ag) or narrow band semiconductors (MoS2, WS2) into the pores will enhance the absorption of visible light and the photon yields. Due to a combination of high crystallinity of TiO2 in the walls, high inner surface and tailored doping the obtained composites are expected to show high photocatalytic activity under both UV- and visible illumination in photocatalytic reactions. As test reactions such performed in gas phase, in liquid phase, in solid phase as well as microbiologic cell destruction will be employed enabling beside of the assessment of the quality of the obtained composite films as novel photocatalyst also a judgement of the suitability of the reactions as standard tests. Special attention will be devoted to the deep understanding of the surface and adsorption properties of the textured surfaces. Finally, a model relating the photocatalytic results with the structural and surface properties of the ordered porous TiO2 films and their doping will be constructed. This will enable the construction of e.g. novel prospective self-cleaning and self-sterilizing surfaces.

有序的多孔薄膜的TiO 2具有严格控制的形态学特性（分级微/介/大孔，膜厚度）和结构（结晶度）将通过蒸发诱导自组装方法制备。将金属离子、硫掺杂剂、金属（Pt、Ag）或窄带半导体（MoS 2、WS 2）的纳米颗粒结合到孔中将增强可见光的吸收和光子产率。由于高结晶度的二氧化钛在壁，高内表面和定制掺杂的组合，所获得的复合材料预计将显示出高的光催化活性下的紫外光和可见光照射下的光催化反应。作为测试反应，将采用在气相、液相、固相中进行的测试反应以及微生物细胞破坏，使得除了能够评估作为新型光催化剂的所获得的复合膜的质量之外，还能够判断作为标准测试的反应的适用性。特别注意将致力于深入了解的表面和吸附性能的纹理表面。最后，光催化效果与有序多孔TiO 2薄膜的结构和表面性质及其掺杂的模型将被构建。这将使得能够构造例如新颖的预期自清洁和自消毒表面。