It is simple to use and can adsorb certain pollutants in a short time.
Disadvantages: only adsorption, no decomposition, no longer adsorption capacity after saturation, and will cause secondary pollution sources.
Plants absorb and decompose a small amount, and have a low absorption value, that is, when the pollution concentration is reduced to a certain value, the plant will not absorb again, which is effective, but a very small amount, which is almost useless.
Disadvantages: The effectiveness of removing harmful gases is very limited and can only be used as an auxiliary means for indoor pollution control.
It is simple and effective to discharge harmful gas through air flow.
Weaknesses: long cycle time, slow purification, and unable to solve the problem from the root cause. Formaldehyde release takes 3-15 years. It is unrealistic for a new house to be idle for more than three years.
Contains flavors and fragrances, which can mask odors and solve air odor problems in a small range.
Disadvantages: it can only play a role in masking the odor, and is low in toxicity itself.
It has a short-time filtering effect on the smoke smell and tiny dust particles in the air.
Weaknesses: limited effect on toxic and harmful gases, short use period of the filter, effective after turning on, energy consumption and noise.
It has a certain effect on formaldehyde and odor in a short time.
Weakness: Mainly for formaldehyde, it has little effect on stupid system, TVOC and other pollutants. It has odor and low toxicity.
Photocatalyst is a new type of environmentally friendly material that is becoming increasingly popular internationally. Its main component is nano-scale titanium dioxide (TiO2). After spraying this product on the wall, it can form a thin film. It absorbs the ultraviolet rays in the sun and photocatalyzes them to generate active oxygen and hydroxyl radicals. It has a strong photo-oxidation-reduction function. Harmful substances such as benzene, ammonia, and TVOC (total volatile organic compounds) are degraded into water and a small amount of carbon dioxide. During the reaction, the photocatalyst itself does not change and lose, and only serves as a catalyst, which is durable. Experiments have shown that with the increase of time, the more the oxidation reaction is stimulated, the higher the activity is, and the better its effect is. At the same time, the photocatalyst also has functions such as sterilization, deodorization, mildew resistance, pollution prevention and self-cleaning.