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Ralf Dillert Sophia University, 7-1 Kioi-cho , Chiyoda-ku , Tokyo 102-8554, Japan

Photocatalytic Active Building Materials: Are They Affecting the Air Quality in the Urban Environment?. Ralf Dillert Sophia University, 7-1 Kioi-cho , Chiyoda-ku , Tokyo 102-8554, Japan

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Ralf Dillert Sophia University, 7-1 Kioi-cho , Chiyoda-ku , Tokyo 102-8554, Japan

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  1. Photocatalytic Active Building Materials:Are They Affecting theAir Quality in the Urban Environment? Ralf Dillert Sophia University, 7-1 Kioi-cho, Chiyoda-ku, Tokyo 102-8554, Japan Permanent address: Institut für Technische Chemie, Leibniz Universität Hannover, Callinstr. 3, 30167 Hannover, Germany

  2. Photocatalytic Products for Passive Air Treatment • Cement • Pavement Stones • Roofing Stones • … • Tiles • RoofingTiles • Plasters • FaçadePaints

  3. Testingthe Photocatalytic Activity:Oxidation of NO (ISO 22197-1) Test Conditions • cNO,in = 1000 ppb in air • T = 25 °C • hr = 50 % • EUV = 10 W m-2

  4. Photocatalytic NO Oxidation

  5. Environmental Conditions • WeatherConditions • Temperature • Humidity • UV Irradiance • Urban Air Pollution

  6. Temperature

  7. Humidity

  8. Light Intensity (UV Irradiance)

  9. Kineticsof Photocatalytic NO Oxidation N. Bengtsson and M. Castellote, J. Adv. Oxid. Technol., 2010, 13, 341. M. Hunger, G. Hüsken and J. Brouwers, Cement Concrete Res., 2010, 49, 313. M. M. Ballari et al., Catal. Today, 2010, 151, 71. M. M. Ballari et al., Appl. Catal. B: Environ., 2010, 95, 245.

  10. Kineticsof Photocatalytic NO Oxidation:InfluenceofIrradianceand NO Concentration Dillert et al., Phys. Chem. Chem. Phys. 2013, 15, 20876-20886.

  11. Kineticsof Photocatalytic NO Oxidation:InfluenceofIrradianceand NO Concentration Dillert et al., J. Hazard Mater. 2012, 211-212, 240-246.

  12. Kineticsof Photocatalytic NO Oxidation:InfluenceofIrradianceand NO Concentration Dillert et al., J. Hazard Mater. 2012, 211-212, 240-246. Dillert et al., Phys. Chem. Chem. Phys. 2013, 15, 20876-20886.

  13. Kineticsof Photocatalytic NO Oxidation:InfluenceofHumidity Dillert et al., unpublishedresults.

  14. Kineticsof Photocatalytic NO Oxidation:InfluenceofHumidity Dillert et al., unpublishedresults.

  15. Environmental Conditions • WeatherConditions • Urban Air Pollution • NO, NO2, HONO, … • CO • SO2 • OrganicCompounds (BTEX, Acids, Aldehydes, …) • Particulate Matter (C, OrganicCompounds, NH4NO3, otherInorganicCompounds)

  16. PollutantConcentration Concentration / µg m-3

  17. Photocatalytic Treatment of NO/NO2Mixtures cNO,in + cNO2,in = cNOx,in ≈ const experimentell run Dillert et al., unpublishedresults.

  18. Photocatalytic Oxidation of Urban Air Pollutants NOx → NO3– NH3 → N2, NOx, NO3– SO2→ SO42– CxHyX→ x CO2 + y/2 H2O + X –

  19. Summary

  20. Are Photocatalytic Active Building Materials Affecting the Air Quality in the Urban Environment?

  21. Acknowledgement • Dipl. chem. Astrid Engel • Dipl.chem. Olga Raisch • Dipl.chem. Anna Glyk • Dr. Julia Große • Prof. Dr. Detlef Bahnemann • Financial Support: BMBF (03X0069F, “HelioClean – Nanotechnologisch funktionalisierte Baustoffe zur solarkatalytischen Luft- und Oberflächenreinigung”)

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