Photocatalytic long-term stability

Evaluating the long-term stability of photocatalytic activity is an important aspect in the use of photocatalytic materials. Due to the classic decomposition processes on the surface, the catalyst can poison itself through the formation of mineral salts produced during the decomposition reaction. The activity decreases over the lifetime. Mechanical stresses such as abrasion and wear can also reduce the lifespan of photocatalytic products. At Fraunhofer IST, these effects are investigated by developing realistic stress scenarios jointly with the customer and optimally coordinating the required analytics in order to quantify the photocatalytic long-term stability of the products.

Fraunhofer IST offers numerous application-oriented long-term and stress tests, which can be combined with the corresponding photocatalytic test engineering depending on customer requirements:

  • Exposure to simulated weathering according to DIN EN ISO 4892-2
  • Corrosion exposure in the salt spray test according to DIN 9227
  • Exposure to mechanical wear in the sand trickling test according to DIN 52348
  • Exposure to mechanical wear in the abrasion test according to DIN 53778