How to distinguish between good and bad photocatalysts?

Photocatalyst has been controversial, in fact, the old photocatalyst received ultraviolet restrictions, it is not recommended to use, the back of the technology is advancing, now only visible light can be decomposed, so it can still be considered. Some better can choose photophyll materials to decompose formaldehyde, which can be decomposed with and without light, mainly with the participation of plant extracts.

Step 1: Open the windows for ventilation. The best way to do this is to open the windows for a long time to ventilate, and through air convection, the pollutants in the indoor air are discharged to the outside. It can also be assisted by an electric fan to accelerate the convection of indoor and outdoor air.

Step 2: Use air purification, after effective ventilation, indoor air pollution has been greatly reduced, photocatalyst with photophyll effect is better, because photophyll extracted from the plant body, can enhance the photosensitivity of plants, can also improve the photosensitivity of photocatalyst, in the environment without light, it can also play a very strong formaldehyde removal effect.

Step 3: Adopt the plant decontamination method. Indoor suitable planting of flower plants are: spider plant (including orchid grass), cactus (cactus family), aloe vera, etc., such plants have a certain purifying effect.

Photocatalyst air purification products, photocatalyst handicrafts, photocatalyst leather varnishing wax, photocatalyst coating water treatment equipment, photocatalyst glass floats, photocatalyst glass, photocatalyst tiles, etc. With the enhancement of environmental awareness, there are more and more photocatalyst derivative products.

Excellent Maya blue light catalyst products should not only completely decompose harmful gases, but also consider the control of pollution sources in the formula design, and need to add active ingredients to the formula to control the pollution source, prevent the release of harmful gases, and achieve the best performance in a combination of long and short effects.

Photocatalysts. The hazards have to damage the air in the room and affect the health of human beings.

The formaldehyde removed by the photocatalyst is only superficial, and it is a passive way to treat the symptoms but not the root cause. The effect is only 3 years at most, and it cannot solve the volatilization source at all. If you want to use photocatalyst particles to remove formaldehyde, then you need millions of nano-scale titanium oxide particles to capture formaldehyde, people living in such an environment, will definitely inhale photocatalyst particles, so it is likely to cause great harm to the human body!

1. Light wave absorption range (take the most photocatalyst nano titanium dioxide on the market as an example).

Pure nano titanium dioxide powder can only absorb ultraviolet light below 400nm.

in the natural environment.

The proportion of ultraviolet light is low, less than 10% of natural light, so pure photocatalysts have basically no use value.

Therefore, as a household photocatalyst, visible light absorption must be achieved. Of course, it is best to absorb far-infrared light, so that good formaldehyde degradation performance can be maintained at night and in closed cabinets.

2. Weather resistance.

Photocatalyst products withstand the test of climate, such as physical wear, cold and heat, and comprehensive damage caused by their own lattice defects, and their resistance is called weather resistance.

It is necessary to choose a photocatalyst with good weather resistance, and the photocatalyst that is easy to fall off has no home use value.

It can be inhaled into the human body and cause cancer. Because it's so small.

In 1965, photocatalysts began to be used to spray home walls in Japan, thus playing the role of disinfection and sterilization and air purification. Later, it was found that the construction caused great harm to the human body. Because the nanoparticles are constantly shedding and cannot stick to soft tissues and walls, the owner will inhale these nanoparticles into the body through breathing.

Because the particles are too small, reaching the nanometer level, they will directly enter the blood circulation through the lungs, similar to the harmful principle, and its harm even greatly exceeds the harm. Although construction workers wear gas masks when spraying, it still greatly increases the chance of cancer among construction workers.

After discovering this major problem, the Japanese decisively eliminated the use of nano-titanium dioxide, a photocatalyst, in walls and other materials.

Photocatalyst air purification product is a liquid that is sprayed on furniture or walls by a spraying machine to form a transparent film, and oxidizes with surrounding organic matter (such as formaldehyde, benzene), etc., but its purification effect is limited by many factors, such as the size of the main component titanium dioxide particles, particle dispersion technology, adhesion, hardness after curing, photosensitization performance, etc.

The main hazards of photocatalysts are that they may cause environmental pollution and damage indoor air quality. Over time, inhalation by the human body is likely to cause great harm. Therefore, it is still not recommended to use it regularly at home, and the effect is limited.

Inferior photocatalysts can be harmful to people. Inferior photocatalyst can not pass the non-toxic test, itself may be toxic, we purify the indoor air is to detoxify, inferior photocatalyst itself is toxic, the introduction of new harmful substances, so not only can not purify the air, but the harmful gas increases, which is very harmful to us.

The photocatalyst turns into fine particles that enter the respiratory tract with the breath, causing respiratory problems.

However, photocatalysts are indeed effective against formaldehyde, so pay attention to ventilation when using photocatalysts, or get some activated carbon for adsorption.

The harm of photocatalysts has the ability to destroy the air in the room and affect the health of human beings. Photocatalyst is a general term for photosemiconductor materials with photocatalytic function represented by nanoscale titanium dioxide, which cannot pass non-toxic testing, may be corrosive, and may cause secondary pollution.

The harm of photocatalysts has the ability to destroy the air in the room and affect the health of human beings. This is a general term for photocatalytic semiconductor materials with photocatalytic function represented by nanoscale titanium dioxide, and one of the safest materials for controlling indoor environmental pollution in the world. The English name is "photo catalyst".

It will endanger people's health, because nanoparticles are easy to fall off, and particles that are too small can easily enter the lungs of the human body and enter the blood circulation, so although photocatalysts have certain advantages, they are still not widely promoted.

There are few hazards, and professionals pass by. At present, a good photocatalyst can still decompose formaldehyde for a long time. We are using practical operations and professional machines every day to verify [cute] Of course, in addition to formaldehyde, it is not only a photocatalyst, but also with other products to comprehensively treat formaldehyde.

The photocatalyst can contain titanium dioxide, and the amount of titanium dioxide exposure in life and the contact scene are not carcinogenic. Carbon dioxide may be carcinogenic to small animals when inhaled in large doses, but the inhalation amount must exceed the concentration of titanium dioxide powder production line, and it is impossible to come into contact with this concentration of titanium dioxide in life.

Affects the health of human beings, but the air purification function. But it's only for a while, and it needs to be used continuously, because formaldehyde is continuously released. Photocatalyst is a portmanteau of light [photo=light] + catalyst.

Basically, there is no harm, as long as you control the dosage, timely ventilation can be, this drug is mainly used to eliminate formaldehyde, itself has a certain toxicity, wear a mask when using, basically there is no harm.

There is no harm.

In fact, the real photocatalyst uses nanoscale materials as raw materials, which is very safe. For example, anatase nano-scale titanium dioxide has a long-lasting effect and is safe and pollution-free.

At present, the most formaldehyde products on the market are photocatalysts, most of the photocatalysts on the market are domestic, and the particle size does not meet the requirements of aldehyde removal, and some people choose to use it to remove aldehyde, because it is cheaper, since you want to choose to remove aldehyde, why not find a big long-lasting and effective one, for the health of the family is very worthwhile, it is recommended to use Ye Duofen engineering products, they pay much more attention to environmental protection than us, and the technology is quite mature, and it is safer without ultraviolet light. Now, more governance companies are using Yeethoven's kind.

Whether the photocatalyst is harmful to the human body depends on the material of the photocatalyst. At present, there are many materials that can be used as photocatalysts, such as titanium dioxide (TiO2), zinc oxide (ZNO), tin oxide (SNO2), zirconium dioxide (ZRO2), cadmium sulfide (CDS) and other oxide sulfide semiconductors.

Photocatalyst is currently the safest and cleanest environmental purification material in the world, and is widely used in Europe, America, Japan, South Korea and other regions. Photocatalyst can effectively degrade formaldehyde, benzene, toluene, xylene, ammonia, TVOC and other pollutants, and has efficient and extensive disinfection performance, which can decompose and harmless the toxins released by bacteria or fungi.

Under the condition that environmental pollution is not serious, as long as it is not worn and peeled, the photocatalyst itself will not change and loss, and the pollutants can be continuously purified under the irradiation of light, which has the advantages of long-lasting and continuous effect. However, if the environmental pollution is more serious, some sulfate and nitrate ions will affect the life and effect of the photocatalyst, and there will be inactivation, which can be reactivated through related technical processes. (Photo by photo:.)

Dong Peng) @2019