Zinc porphyrin/mesoporous titania thin film electrodes: a hybrid material nanoarchitecture for photocatalytic reduction

Abstract

In this work, photocatalytic reduction of methyl viologen is achieved using zinc tetra(4-N-methylpyridyl)porphine (ZnP) functionalized mesoporous titania thin films (MTTF). Also, ZnP sensitizing and photophysical properties are retained in the hybrid material.

Chemical Design of Efficient Photoelectrodes by Heterogeneous Nucleation of Carbon Dots in Mesoporous Ordered Titania Films

“…After five cycles and 48 min, the current density decreases by less than 10%. This result proves the better stability of the m-TiO 2 /C-dots photoelectrode compared with other mesoporous ordered titania-based systems, such as porphyrin-sensitized TiO 2 films . In that case, a gradual leakage of the sensitizer is generally observed in the electrodes caused by the electrolyte in solution.…”

Fe–Ni porphyrin/mesoporous titania thin film electrodes: a bioinspired nanoarchitecture for photoelectrocatalysis

“…The modication of the cMTTF with MP (FeP, NiP, or NiP/FeP) was performed as in our previous reports, 16,20 by 48 h immersion in an MP solution in water, with 30 mM total concentration. Aer adsorption, f-MP was rinsed with deionized water, airdried, and placed in a vacuum oven at 60 °C to dry for 6 h. The obtained hybrid materials were f-FeP, f-NiP, and f-NiP/FeP, respectively.…”

“…1 Following this approach, in our previous work, we described new hybrid materials based on a mesoporous TiO 2 thin lm doped with Prussian blue analogs, Zn-porphyrin, or carbon dots with great potential in photoelectric applications. [15][16][17] Here we evaluate whether the coexistence of Fe and Ni metalloporphyrins can give a relevant OER activity as molecular catalysts while immobilized in a crystalline mesoporous titania thin lm (cMTTF). These lms constitute a photoactive, robust, reproducible, and high-surface-area platform for porphyrin immobilization.…”

Sunlight-Driven Photocatalysis for a Set of 3D Metal–Porphyrin Frameworks Based on a Planar Tetracarboxylic Ligand and Lanthanide Ions

“…For example, our group recently reported a set of mesoporous thin films doped with zinc-based exhibiting photocatalytic properties toward dye degradation under sunlight conditions. 10 Moreover, in 2020, we used a Mn− porphyrin to functionalize mesoporous thin films, providing it with the ability to capture volatile organic compounds, resulting in a low-cost sensing device. 11 On the other hand, trivalent lanthanide ions (Ln 3+ ) are optimal building blocks to construct MOFs with interesting optical properties since they can impart tailored photoluminescent behavior spanning through a broad range, from ultraviolet to visible and near-infrared wavelengths.…”

“…Also, organic linkers with π-conjugated backbones, such as porphyrins, are vastly desirable building blocks for materials with high performance in the photodegradation of dyes because they respond more efficiently to the complete solar spectrum. For example, our group recently reported a set of mesoporous thin films doped with zinc-based exhibiting photocatalytic properties toward dye degradation under sunlight conditions . Moreover, in 2020, we used a Mn–porphyrin to functionalize mesoporous thin films, providing it with the ability to capture volatile organic compounds, resulting in a low-cost sensing device …”