Sophia University, 7-1 Kioi-cho, Chiyoda-ku, Tokyo , Japan

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Presentation transcript:

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 Permanent address: Institut für Technische Chemie, Leibniz Universität Hannover, Callinstr. 3, 30167 Hannover, Germany

Photocatalytic Products for Passive Air Treatment Cement Pavement Stones Roofing Stones … Tiles Roofing Tiles Plasters Façade Paints

Testing the 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

Photocatalytic NO Oxidation

Environmental Conditions Weather Conditions Temperature Humidity UV Irradiance Urban Air Pollution

Temperature

Humidity

Light Intensity (UV Irradiance)

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

Kinetics of Photocatalytic NO Oxidation: Influence of Irradiance and NO Concentration Dillert et al., J. Hazard Mater. 2012, 211-212, 240-246.

Kinetics of Photocatalytic NO Oxidation: Influence of Irradiance and NO Concentration Dillert et al., J. Hazard Mater. 2012, 211-212, 240-246. Dillert et al., Phys. Chem. Chem. Phys. 2013, 15, 20876-20886.

Kinetics of Photocatalytic NO Oxidation: Influence of Humidity Dillert et al., unpublished results.

Kinetics of Photocatalytic NO Oxidation: Influence of Humidity Dillert et al., unpublished results.

Environmental Conditions Weather Conditions Urban Air Pollution NO, NO2, HONO, … CO SO2 Organic Compounds (BTEX, Acids, Aldehydes, …) Particulate Matter (C, Organic Compounds, NH4NO3, other Inorganic Compounds)

Pollutant Concentration Concentration / µg m-3

Photocatalytic Treatment of NO/NO2 Mixtures cNO,in + cNO2,in = cNOx,in ≈ const experimentell run Dillert et al., unpublished results.

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

Summary

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

Prof. Dr. Detlef Bahnemann 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”)