| Autor: |
Niegisch, Nico, Akarsu, Murat, Csögör, Zsuzsa, Ehses, Markus, Schmidt, Helmut K. |
| Jazyk: |
angličtina |
| Rok vydání: |
2002 |
| Předmět: |
|
| DOI: |
10.22028/D291-24705 |
| Popis: |
The photocatalytic effect of TiO2 (especially anatase) is very well known. For the utilization of this effect for hygienic surfaces, especially on plastic surfaces, a wet coating technology has been developed. To enhance the photocatalytic effect of TiO2, anatase nanoparticles with a narrow volume particle size distribution (d1=7nm, d50=9nm, d90=11nm) have been synthesized and surface modified by hydrophobic components in order to disperse them in organic solvents. Since the photocatalytic effect is a non-specific one, and all organic materials are oxidized, a buffer layer stable against oxidation has been used between plastic substrates and TiO2 top layer. The selfcleaning behaviour was determined by the degradation of bovine serum albumin. After 8 h under irradiation (1200 W/m2) in a sun tester the concentration was decreased from 0.3 mg/cm2 under the limit of detection. To show the antimicrobial effect colony forming bacteria (E. coli) were determined after 10 min irradiation (1200 W/m2) leading to an inactivation of about 50% of 1000 CFU/cm2. Additionally the coated plastic surface shows an antifogging behaviour. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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