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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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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

photocatalytic products for passive air treatment
Photocatalytic Products for Passive Air Treatment
  • Cement
    • Pavement Stones
    • Roofing Stones
  • Tiles
  • RoofingTiles
  • Plasters
  • FaçadePaints
testing the photocatalytic activity oxidation of no iso 22197 1
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
environmental conditions
Environmental Conditions
  • WeatherConditions
    • Temperature
    • Humidity
    • UV Irradiance
  • Urban Air Pollution
kinetics of photocatalytic no oxidation
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.

kinetics of photocatalytic no oxidation influence of irradiance and no concentration
Kineticsof Photocatalytic NO Oxidation:InfluenceofIrradianceand NO Concentration

Dillert et al., Phys. Chem. Chem. Phys. 2013, 15, 20876-20886.

kinetics of photocatalytic no oxidation influence of irradiance and no concentration1
Kineticsof Photocatalytic NO Oxidation:InfluenceofIrradianceand NO Concentration

Dillert et al., J. Hazard Mater. 2012, 211-212, 240-246.

kinetics of photocatalytic no oxidation influence of irradiance and no concentration2
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.

environmental conditions1
Environmental Conditions
  • WeatherConditions
  • Urban Air Pollution
    • NO, NO2, HONO, …
    • CO
    • SO2
    • OrganicCompounds (BTEX, Acids, Aldehydes, …)
    • Particulate Matter (C, OrganicCompounds, NH4NO3, otherInorganicCompounds)
pollutant concentration
PollutantConcentration

Concentration / µg m-3

photocatalytic treatment of no no 2 mixtures
Photocatalytic Treatment of NO/NO2Mixtures

cNO,in + cNO2,in = cNOx,in ≈ const

experimentell run

Dillert et al., unpublishedresults.

photocatalytic oxidation of urban air pollutants
Photocatalytic Oxidation of Urban Air Pollutants

NOx → NO3–

NH3 → N2, NOx, NO3–

SO2→ SO42–

CxHyX→ x CO2 + y/2 H2O + X –

acknowledgement
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”)