Abstract
Air quality is one of the most important problems of the modern world, as it determines human health and changes occurring in other elements of nature, including climate change. For this reason, actions are taken to reduce the amount of harmful substances in the air. One such action is the use of building materials with special properties achieved by the application of self-cleaning coatings and photocatalytic additives. This article presents achievements in the field of additives and modifiers for building materials, whose task is to improve air quality. Concrete, cement, paints, and facade coatings modified based on the achievements of nanotechnology have been analyzed in terms of new properties and the possibility of their application in the area of modern environmental requirements. Both positive aspects and doubts were described in the scope of the effective reduction of the amount of gases such as VOC, NOx, dust and microorganisms.
Highlights
Air pollution is increasing year by year
Modified building materials are the answer to the worsening air quality
They contribute to reducing the degree of air pollution with compounds hazardous to human health, such as volatile inorganic compounds or nitrogen oxides (NOx) or microorganisms
Summary
The most important are CO2 , nitrogen oxides (NOx ), polycyclic aromatic hydrocarbons (PAHs) and volatile organic compounds (VOCs), heavy metals (including Pb, Cd, Cu, Cr, Ni, Se, Zn) and dust (PM2.5 –PM10 ). It should be noted, that the presence of these compounds is important, and the reactions in the atmosphere with the participation of these compounds. The research covered Espacenet, Patentscope, and Google Patents, which resulted in the presentation of selected patents relevant to the subject
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