BS EN 16845-1:2017
$167.15
Photocatalysis. Anti-soiling chemical activity using adsorbed organics under solid/solid conditions – Dyes on porous surfaces
| Published By | Publication Date | Number of Pages |
| BSI | 2017 | 34 |
This European Standard specifies a test method for the evaluation of the photocatalytic self-cleaning performance of materials showing photocatalytic activity, usually based on semiconducting metal oxides such as titanium dioxide, by the measurement under solid/solid conditions of the decolouring ability under irradiation with ultraviolet light (UV-A) of a test sample on which a dye solution is sprayed and dried. This European Standard is intended for use with opaque and rough surfaces of different kinds, such as construction materials in flat sheet, board or plate shape, that are the basic forms of materials for various applications. This European Standard also applies to fabric, plastic or composites containing photocatalytic materials that are not soluble in acetone. This European Standard does not apply to photocatalytic glass, granular materials (unless they are deposited in compact films or layers over flat solid surface) and flat non porous materials. The method evaluates only the self-cleaning ability of the material under ultraviolet light irradiation. It cannot be applicable to evaluate other performance attributes of photocatalytic materials, i.e. decomposition of water contaminants in liquid or gas phases contacting the material, and antifogging and antibacterial actions.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 7 | 1 Scope 2 Normative references 3 Terms and definitions |
| 8 | 4 Symbols and abbreviations |
| 9 | 5 Principle 6 Instruments 6.1 Spraying system |
| 11 | 6.2 Analytical balance |
| 12 | 6.3 Diffuse Reflectance Spectrometer 6.4 Light source 6.5 Other experimental needs 7 Materials 7.1 Dyes used |
| 13 | 7.2 Preparation of Solutions to Spray 7.3 Test Samples 7.4 Other experimental needs 8 Procedure 8.1 General Aspects 8.1.1 General |
| 14 | 8.1.2 Initial set up and calibration 8.1.3 Measurement of the Reflectance Spectra of the Surface 8.2 Optimization of the Experimental Setup 8.2.1 General 8.2.2 Optimization of the Spraying Distance and Flow 8.2.3 Measurement of the Spraying Flow Rate |
| 15 | 8.2.4 Evaluation of the Deposition Rate (DR) 8.3 Test Procedure 8.3.1 Evaluation of the Dirt Parameter Calibration Function |
| 16 | 8.3.2 Choice of Test Sample Covered with Dye for Irradiation 8.3.3 Evaluation of the Photocatalytic Self-cleaning Performance |
| 17 | 8.3.4 Results 9 Calculation 9.1 General 9.2 Spraying Flow (f) |
| 18 | 9.3 Dirt Parameter 9.4 Covered Area |
| 19 | 9.5 Deposition Rate 9.6 Standard Spraying Time |
| 20 | 9.7 Dirt Parameter Calibration Function 9.8 Remaining Dye (βi) after Different Times of Irradiation 9.9 Dye Half-Life |
| 21 | 10 Precision and Reproducibility 11 Test Method for Samples with Low to Negligible Performance 12 Test Report |
| 23 | Annex A (informative)Typical Experimental Data A.1 General A.2 Optimization of the Spraying Conditions (example) |
| 24 | A.3 Measurement of the Spraying Mass Flows (example) |
| 25 | A.4 Measurement of the Covered Area (example) |
| 27 | A.5 Evaluation of the Dirt Parameter Calibration Function (example) |
| 29 | A.6 Evaluation of the Self-cleaning Effect (example) |
