Mesoporous TiO2 from Metal-Organic Frameworks for Photoluminescence-Based Optical Sensing of Oxygen

Metal?organic frameworks (MOFs) are a class of porous coordination networks extraordinarily varied in physicochemical characteristics such as porosity, morphologies, and compositions. These peculiarities make MOFs widely exploited large array applications, catalysis, chemicals gas sensing, drug delivery, energy storage, conversion. can also serve nanostructured precursors metal oxides with peculiar controlled shapes. In this work, starting from MIL125-(Ti), 1,4-benzenedicarboxylate (BDC)-based MOF Ti metallic center, mesoporous TiO2 powders containing both anatase rutile crystalline phases were produced. A challenging utilization these MOF-derived Ti-based is the optically-based quantitative detection molecular oxygen (O2) gaseous and/or aqueous media. study, photoluminescence (PL) intensity changes during O2 exposure two mixed-phase probed by exploiting opposite response VIS-PL NIR-PL wavelength intervals. This result highlights promising future possibilities for realization doubly-parametric TiO2-based optical sensors.