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Photocatalytic Active Building Materials: Are They Affecting the Air Quality in the Urban Environment? Ralf Dillert Sophia.

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Presentation on theme: "Photocatalytic Active Building Materials: Are They Affecting the Air Quality in the Urban Environment? Ralf Dillert Sophia."— Presentation transcript:

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

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

3 Testing the Photocatalytic Activity: Oxidation of NO (ISO ) Test Conditions c NO,in = 1000 ppb in air T = 25 °C h r = 50 % E UV = 10 W m -2

4 Photocatalytic NO Oxidation

5 Environmental Conditions Weather Conditions Temperature Humidity UV Irradiance Urban Air Pollution

6 Temperature

7 Humidity

8 Light Intensity (UV Irradiance)

9 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.

10 Kinetics of Photocatalytic NO Oxidation: Influence of Irradiance and NO Concentration Dillert et al., Phys. Chem. Chem. Phys. 2013, 15,

11 Kinetics of Photocatalytic NO Oxidation: Influence of Irradiance and NO Concentration Dillert et al., J. Hazard Mater. 2012, ,

12 Kinetics of Photocatalytic NO Oxidation: Influence of Irradiance and NO Concentration Dillert et al., J. Hazard Mater. 2012, , Dillert et al., Phys. Chem. Chem. Phys. 2013, 15,

13 Kinetics of Photocatalytic NO Oxidation: Influence of Humidity Dillert et al., unpublished results.

14 Kinetics of Photocatalytic NO Oxidation: Influence of Humidity Dillert et al., unpublished results.

15 Environmental Conditions Weather Conditions Urban Air Pollution NO, NO 2, HONO, … CO SO 2 Organic Compounds (BTEX, Acids, Aldehydes, …) Particulate Matter (C, Organic Compounds, NH 4 NO 3, other Inorganic Compounds)

16 Pollutant Concentration Concentration / µg m -3

17 Photocatalytic Treatment of NO/NO 2 Mixtures Dillert et al., unpublished results. c NO,in + c NO 2,in = c NOx,in const experimentell run

18 Photocatalytic Oxidation of Urban Air Pollutants NO x NO 3 – NH 3 N 2, NO x, NO 3 – SO 2 SO 4 2– C x H y X x CO 2 + y/2 H 2 O + 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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