Article, 2024

The superiority of TiO2 hollow microspheres over nanoparticles upon integration into a coating formulation for VOC removal

ChemCatChem, ISSN 1867-3899, 1867-3880, Volume 16, 4, 10.1002/cctc.202301383

Contributors

Golbarg, Sara 0000-0001-8117-4210 [1] Garcia, Alicia Gutierrez [1] Velázquez-Palenzuela, Amado Andrés 0000-0003-2556-0656 [1] Dam-Johansen, Kim Dam- 0000-0003-1658-6176 [1] Christensen, Jakob Munkholt 0000-0002-2495-8905 (Corresponding author) [1]

Affiliations

  1. [1] Technical University of Denmark
    2. [NORA names: DTU Technical University of Denmark; University; Denmark; Europe, EU; Nordic; OECD]

Abstract

Abstract Heterogeneous photocatalysis is a promising technology for the abatement of pollutants in the air. Practical application of this technology requires the incorporation of the photocatalyst into a coating formulation. The coating can subsequently be applied on surfaces with a large geometric area, promoting various catalytic reactions. Photocatalysts, such as TiO 2 , appear to be most active in the form of nanoparticles. However, there is a rising concern regarding the adverse health effects of the nano‐sized particles. In this study, we investigate the photocatalytic oxidation of isopropanol, a common VOC, and demonstrate that a water‐based acrylic coating containing TiO 2 micrometer‐sized hollow spheres can outperform a nanoparticle‐based coating by a factor of 10 in the rate of isopropanol removal. The porous shell structure of TiO 2 hollow microspheres enables a three‐dimensional surface porosity within the coating film, thereby enhancing the access to the active catalytic surface. Our findings underscore the importance of the catalyst morphology for practical applications of photocatalytic materials when integrated into a coating formulation.

Keywords

TiO, TiO 2, TiO2 hollow microspheres, VOC, VOC removal, abatement, abatement of pollution, access, acrylic coating, active catalytic surface, adverse health effects, air, application of photocatalytic materials, applications, area, catalyst, catalyst morphology, catalytic reactions, catalytic surface, coating, coating film, coating formulations, effect, factors, films, findings, formulation, geometric area, health effects, heterogeneous photocatalysis, hollow microspheres, hollow spheres, incorporation, integration, isopropanol, isopropanol removal, materials, microspheres, morphology, nano-sized particles, nanoparticle-based coatings, nanoparticles, oxidation, particles, photocatalysis, photocatalyst, photocatalytic materials, photocatalytic oxidation, pollution, porosity, porous shell structure, practical applications, rate, reaction, removal, shell structure, sphere, structure, study, superiority, surface, surface porosity, technology, water-based acrylic coating

Data Provider: Digital Science

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