Who are you?

The city official

Urban environments are known for being surrounded by unwanted harmful particles, such as NOx and VOCs. In generic terms, it’s called air pollution. Consequently, cities have to spend billions of money yearly providing healthcare for their population.

In Photocat we strive to improve the local air quality by continuously innovating and pushing boundaries. We engage public authorities and companies to collaborate on innovative projects with intelligent building materials. We provide solutions that contribute to both the health and the environmental agenda in cities.

We do it by joining forces with our partners in the building- and infrastructure sector. Together we advocate for the right to breathe clean air, and we promote a healthier environment through active surfaces that reduce air pollution in cities by using light.

Why your city should seek to improve its a quality through active surfaces

Around 8 million people die prematurely due to air pollution worldwide (United Nations, 2016). In Europe the number related to premature deaths due to poor air quality is more than 400,000. Approximately 90 % of the world’s population is exposed to hazardous air quality and live in places where the WHO guideline limits for air quality are exceeded.

As a society, we should not accept the cost of air pollution. With bold decisions and smart investments in cleaner transport, energy, and agriculture, we can both tackle pollution and improve our quality of life,” says EEA Executive Director Hans Bruyninckx

Poor air quality is directly linked to several severe illnesses: heart disease, stroke, chronic lung disease, cancer, and asthma. Especially children and elders are at risk. Air pollution causes ten times more premature deaths per year than traffic accidents.

“Cleaning up the air we breathe prevents non-communicable diseases as well as reduces disease risks among women and vulnerable groups, including children and the elderly…” Dr Flavia Bustreo, WHO Assistant Director-General Family, Women and Children’s Health

Photocat reduces NOx where and when we are exposed

In most cities the air quality is highly correlated with our everyday movement. When we take the bus, bike or walk to work, well, that is when traffic is at its heaviest and coincidentally that is when we are exposed to high levels of air pollutants such as NOx. The same goes for when we head back. Air quality is poorest during the day. Photocatalysis is activated by daylight.

Outdoor air pollution

Causes 4.2 million premature deaths worldwide


Causes between 75,000 & 229,000 premature deaths in Europe

How the active reduction of air pollution relates to the UN sustainable development goals

UN SDGs 11

Urban areas significantly contribute to air pollution. Making cities sustainable could progressively improve the air quality

How to implement in your next city tender

In order to ensure that the photocatalytic technology applied is of the highest standard we propose that you include a condition in your next tender stating that the material is tested according to an ISO 22197-1. The purpose is to enforce that the building manufacturer deliver a product that holds a standard that effectively contributes to improved air quality.

One example of photocatalysis being implemented in a city as a consistent means to improve air quality is found in the city of Barcelona:


Plan to improve air quality in Barcelone 2015 – 2018

EL12 – Air purification using photo-catalytic materials: Using construction materials with the ability to reduce atmospheric pollutants, such as NOx, PM10, benzene and carbon oxides

(Barcelona Regional. Agència Desenvolupament Urbà Gerència Adjunta de Medi Ambient i Serveis Urbans, 2015).

Nice to know

We recommend that architects, engineers and other building professional specify the following criterias.

  • Building Materialsmust be treated with an active photocatalytic dispersion of ultrafine titanium dioxide.
  • The applied ultra fine titanium dioxide dispersion must be environmentallt friendly and should be waterbased.
  • The Building Material must be photocatalytic and tested according to the ISO standard 22197-1.


Concrete surfaces

Concrete surfaces

 Bitumen membranes

Bitumen membranes

Asphalt surfaces

Asphalt surfaces

Ready to get started?

More than 9 million m2 of applied surfaces

Degrading more than 301 kg/NOx per day

+ 324 tons of NOx degraded in total