The use of Titanium-based Metal-Organic Frameworks (MOFs) as substitutes for titanium dioxide in photocatalytic applications is a recent topic of study. A promising approach is to perform a titanium exchange within a zirconium-based MOF to build a material that combines the properties of the two metals, high thermal stability, and photoactivity. In this work, a novel Zr/Ti MOF that incorporated a dioxo-molybdenum (VI) complex was successfully prepared using two post-synthetic steps. First, a molybdenum complex was anchored to a bipyridine-dicarboxylate linker of a UiO-67 type MOF. Second, a Ti⁴⁺ ion exchange for Zr⁴⁺ at the zirconium MOF nodes was performed. The as-prepared samples were characterized by PXRD, TGA, FT-IR, N₂ adsorption, XPS, SEM and UV–vis in diffuse reflectance mode. The introduction of titanium changed the optical properties of UiO-67 adding advantages through the TiO₂ moieties attached to its structure. This was attributed to the metal exchange and the formation of oxo-bridged hetero-Zr-Ti clusters with some loss of crystallinity. Additionally, the addressed surface characterization showed that dioxo-molybdenum (VI) and titanium were incorporated into the structure of Zr-MOF with a small decrease in the surface BET area.

在光催化应用中使用钛基金属有机骨架（MOF）替代二氧化钛是最近的研究主题。一种有前途的方法是在基于锆的MOF中进行钛交换，以构建一种结合了两种金属的特性，高热稳定性和光活性的材料。在这项工作中，使用两个合成后步骤成功地制备了掺有二氧钼（VI）配合物的新型Zr / Ti MOF。首先，将钼配合物锚定在UiO-67型MOF的联吡啶-二羧酸酯连接基上。其次，在锆MOF节点上进行Zr ⁴⁺的Ti ⁴⁺离子交换。制备的样品通过PXRD，TGA，FT-IR，N ₂表征在漫反射模式下进行吸附，XPS，SEM和UV-vis。钛的引入改变了UiO-67的光学特性，并通过附着在其结构上的TiO ₂部分增加了优势。这归因于金属交换和氧代桥联杂Zr-Ti团簇的形成，但结晶度有所降低。另外，所述的表面表征显示二氧钼（VI）和钛被掺入Zr-MOF的结构中，且表面BET面积的减小很小。