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Flow-through Gas Phase Photocatalysis Using TiO2 Nanotubes on Wirelessly Anodized 3D-Printed TiNb Meshes.

ABSTRACT: In this work, for the first time 3D Ti-Nb meshes of different composition, i.e., Ti, Ti-1Nb, Ti-5Nb, and Ti-10 Nb, were produced by direct ink writing. This additive manufacturing method allows tuning of the mesh composition by simple blending of pure Ti and Nb powders. The 3D meshes are extremely robust with a high compressive strength, giving potential use in photocatalytic flow-through systems. After successful wireless anodization of the 3D meshes toward Nb-doped TiO2 nanotube (TNT) layers using bipolar electrochemistry, they were employed for the first time for photocatalytic degradation of acetaldehyde in a flow-through reactor built based on ISO standards. Nb-doped TNT layers with low concentrations of Nb show superior photocatalytic performance compared with nondoped TNT layers due to the lower amount of recombination surface centers. High concentrations of Nb lead to an increased number of recombination centers within the TNT layers and reduce the photocatalytic degradation rates.

SUBMITTER: Sopha H 

PROVIDER: S-EPMC10375580 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature

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Flow-through Gas Phase Photocatalysis Using TiO<sub>2</sub> Nanotubes on Wirelessly Anodized 3D-Printed TiNb Meshes.

Sopha Hanna H   Kashimbetova Adelia A   Baudys Michal M   Chennam Pavan Kumar PK   Sepúlveda Marcela M   Rusek Jakub J   Kolibalova Eva E   Celko Ladislav L   Montufar Edgar B EB   Krysa Josef J   Macak Jan M JM  

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In this work, for the first time 3D Ti-Nb meshes of different composition, i.e., Ti, Ti-1Nb, Ti-5Nb, and Ti-10 Nb, were produced by direct ink writing. This additive manufacturing method allows tuning of the mesh composition by simple blending of pure Ti and Nb powders. The 3D meshes are extremely robust with a high compressive strength, giving potential use in photocatalytic flow-through systems. After successful wireless anodization of the 3D meshes toward Nb-doped TiO<sub>2</sub> nanotube (TN  ...[more]

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