The impact of photocatalytic paint porosity on indoor NOx and HONO levels
| Autor: | Henri Wortham, Gregory Brochard, Virginie Bergé, Vincent Bartolomei, Delphine Truffier-Boutry, Adrien Gandolfo, Brice Temime-Roussel, Sasho Gligorovski |
|---|---|
| Přispěvatelé: | Laboratoire Chimie de l'environnement (LCE), Aix Marseille Université (AMU)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Innovation pour les Technologies des Energies Nouvelles et les nanomatériaux (LITEN), Institut National de L'Energie Solaire (INES), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-Institut de Chimie du CNRS (INC), Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Nitrous acid
010504 meteorology & atmospheric sciences Indoor air Environmental remediation General Physics and Astronomy 010501 environmental sciences 01 natural sciences chemistry.chemical_compound chemistry Environmental chemistry [SDE]Environmental Sciences Photocatalysis Physical and Theoretical Chemistry Porosity Nitrogen oxides NOx Volume concentration ComputingMilieux_MISCELLANEOUS 0105 earth and related environmental sciences |
| Zdroj: | Physical Chemistry Chemical Physics Physical Chemistry Chemical Physics, 2020, 22 (2), pp.589-598. ⟨10.1039/C9CP05477D⟩ Physical Chemistry Chemical Physics, Royal Society of Chemistry, 2020, 22 (2), pp.589-598. ⟨10.1039/C9CP05477D⟩ |
| ISSN: | 1463-9076 1463-9084 |
| DOI: | 10.1039/C9CP05477D⟩ |
| Popis: | Photocatalytic materials are a potentially effective remediation technology for indoor air purification. In this paper, we assess the impact of photocatalytic paint porosity on the indoor levels of nitrogen oxides (NOx) and nitrous acid (HONO). We observed that the porosity of photocatalytic paints plays a paramount role in the NO2 removal. The increase of pigment volume concentration (PVC), i.e. porosity, from PVC 53% to PVC 80% leads to an increase of the geometric NO2 uptake coefficient from (3.3 ± 0.5) × 10-6 to (3.2 ± 0.1) × 10-4. At the same time, a high quantity of HONO formed by NO2 conversion on the photocatalytic paint is emitted into the air. The formation of HONO, which is considered as a harmful compound and a major player in the oxidative capacity of indoor air, is reduced as the paint porosity increases. Based on these results, further optimization should be considered for future commercialization of photocatalytic paints aimed for indoor applications. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|