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

Overview

Journal Nano Lett

Publisher American Chemical Society

Specialty Biotechnology

Date 2023 Jul 12

PMID 37436039

Authors

Hanna Sopha

Adelia Kashimbetova

Michal Baudys

Pavan Kumar Chennam

Marcela Sepulveda

Jakub Rusek

Eva Kolibalova

Ladislav celko

Edgar B Montufar

Josef Krysa

Jan M Macak

Affiliations

Soon will be listed here.

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 TiO 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.

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