Characterization of photocatalytic paints: a relationship between the photocatalytic properties – release of nanoparticles and volatile organic compounds
| Autor: | B. Fiorentino, Sasho Gligorovski, Gregory Brochard, Vincent Bartolomei, O. Sicardy, R. Soulas, B. Pepin-Donat, G. Gebel, A. Audemard, Henri Wortham, C. Lombard, Anass Benayad, Adrien Gandolfo, Jean-François Damlencourt, L. Porcar, Delphine Truffier-Boutry |
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| Přispěvatelé: | CEA/DRT/LITEN - Laboratoire de Nanocaractérisation et Nanosécurité, Laboratoire Chimie de l'environnement (LCE), Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-Institut de Chimie du CNRS (INC), Conception d’Architectures Moléculaires et Processus Electroniques (CAMPE), SYstèmes Moléculaires et nanoMatériaux pour l’Energie et la Santé (SYMMES), Institut de Chimie du CNRS (INC)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), ALLIOS, Institut Laue-Langevin (ILL), ILL, State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, ANR-11-IDEX-0001,Amidex,INITIATIVE D'EXCELLENCE AIX MARSEILLE UNIVERSITE(2011), ANR-10-EQPX-0039,NanoID,Plateforme d'identification des nanoparticules dédiée à la sécurité(2010), Aix Marseille Université (AMU)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
[SDE.IE]Environmental Sciences/Environmental Engineering Materials Science (miscellaneous) Xylene Formaldehyde Nanoparticle 02 engineering and technology 010501 environmental sciences 021001 nanoscience & nanotechnology 01 natural sciences chemistry.chemical_compound Chemical engineering chemistry 13. Climate action Titanium dioxide Photocatalysis Degradation (geology) Methanol 0210 nano-technology NOx ComputingMilieux_MISCELLANEOUS 0105 earth and related environmental sciences General Environmental Science |
| Zdroj: | Environmental science.Nano Environmental science.Nano, Royal Society of Chemistry, 2017, 4 (10), pp.1998-2009. ⟨10.1039/c7en00467b⟩ Environmental science.Nano, 2017, 4 (10), pp.1998-2009. ⟨10.1039/c7en00467b⟩ |
| ISSN: | 2051-8153 |
| DOI: | 10.1039/c7en00467b⟩ |
| Popis: | Photocatalytic TiO2 appears to be a promising material to eliminate many air pollutants such as nitrogen oxides (NOx) and volatile organic compounds (VOCs). However, a number of questions remain unanswered prior to its full optimization. Some photocatalytic materials are already commercialized but their photocatalytic effects are questionable. In the present study, characterization of two paints for indoor and outdoor applications, one containing micro-sized titanium dioxide (TiO2) particles and the other based on nano-TiO2, is undertaken in order to understand their environmental impact during the use phase. The photocatalytic efficiency of the paints is determined before and after climatic ageing. The degradation of the paints induced by their ageing is characterized in parallel. Powders, dispersions and paints applied on a substrate are investigated to characterize the state of the nanoparticles (NPs) as a function of their surrounding media. The abrasion of the photocatalytic materials indicates that the presence of TiO2 (NPs) enhances the organic matrix degradation of the paints due to a greater photocatalytic effect. The online and continuous measurements by PTR-ToF-MS indicate that the degradation of the organic matrix leads to release of organic compounds (formaldehyde, methanol, acetaldehyde and formic acid) into the air which suggests that monitoring only the removal of VOCs (in this case xylene) is not enough to make a proper evaluation of the effectiveness of photocatalytic paints towards VOC elimination. These VOCs emerge exclusively from the degradation of the organic matrix as much lower VOC emissions were measured in the case of the aged paint which exhibits a lower amount of organic components in the matrix. This study links the morphological observations, chemical determination, structural parameters and photocatalytic properties of the paints for future optimization of safer-by-design photocatalytic paints. |
| Databáze: | OpenAIRE |
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