Kiến thức UVC

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Công nghệ khử trùng không khí bằng tia UV hiệu quả và hiệu quả vào năm 2020

Thời gian: 2020-07 09-

To fight with the serious air pollution, there are plenty of UV lamps on the market now. 

Experiments, researches, and a lot more have been done in the centuries to sterilize the air and improve the quality. But they are eventually proven less effective. 

Many technologies like UV mercury or UVC lights were said to be health-friendly, but they are not as effective as TiO2 photocatalyst with UV LED lights.

So, in this article, we will take you to the journey from less to the highly effective technologies of UV air sterilization. 

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1. UV Mercury Tube is dangerous for health

We all know and understand the dangers of UV mercury lights. The exposure to a certain level can always cause more troubles for skin burns and sometimes visions too. Look for the hazards of it and be safe when using it. 

  • Mercury is a toxic substance

Mercury has always been a toxic substance and the inhalation of it was directly subjected to the damage of lungs, kidney, etc. So, the one in the lights can cause some dangerous effects too. Insomnia, memory loss, headaches, and a lot of other problems can be associated with the fact that mercury is present in the air.

thủy ngân gây hại

To understand the level of toxicity, you may need as one more question and that is:

  • What if a UV Mercury-containing Light Breaks?

Each UV vapor lamp contains approximately 400 mg of elemental mercury. So, if it breaks, mercury can be harmful to the eyes and skin. It may be just through the inhalation and without direct contact with mercury, but it can create health issues such as cough, fever, difficulty breathing, headaches, etc.

Being aware of the damages of Mercury-containing lights brings us to the UV-C strips and LED lights. After discovering the dangers of UV, it was considered as disinfection for air for a long time. 

2. UVC LED Strip is low performance

Commercially UVC LEDs are available on the market from near 10 years ago, the big problem of these led types is:

  • Limited Output Power Range

The UVC portion represents wavelengths from 200 nm-280 nm, with the range from 250 nm - 280 nm. It disinfects the bacteria and microbes, but in a limited way and doesn’t work best for the large areas.

  • Weak Penetration ability

Before you think UV-C lights as an effective and instant solution, but they still possess limited strength. And the inability to reach the UV shadows is another pitfall. These are the areas where UV light is blocked by another object.

uv cost

  • Giá cao

Moreover, the UVC lights are expensive and when you consider other drawbacks of it, you will realize that it is not worth the money you are spending on it. 

3. Why is UV LED+Photocatalyst the best choice?

Right now the environment is the main concern for any industry. So, here is the best choice for lights. As we have tried many technologies disinfect the air and they also had their side effects causing more troubles or weaknesses of the bulbs that led to more problems. 

Well, science and technology have one best thing and it is research until you get successful. So, here comes the UV LED + Photocatalyst. Let’s see how it is the best choice so far.

3.1 What is photocatalysis and how does it work?

For a simple understanding of photocatalyst, you must understand it is the activity that occurs during the process of light hitting the surface of semiconductor materials. And the photocatalyst helps in decomposing the pollutants of the environment. Or you can say the sterilization of the air is possible with this process.

hành động tế bào

In this process, the catalyst does not change itself or it is also not consumed in the chemical reaction, so the synchronization of the two processes happens. 

There are many types of research on it, but the TiO2 is discovered to be the aid of decomposing cyanide in water and now it is also decomposing bacteria in the air for sterilization. 

Photocatalyst is a general term for photo-semiconductor materials with photocatalytic function represented by nanometer TiO2 (titanium dioxide). 

Việc phủ lên bề mặt đế, dưới tác dụng của tia cực tím có thể làm cho các chất hữu cơ hoặc vô cơ trải qua các phản ứng oxy hóa - khử.

Sau đó, nó có thể tiêu diệt hiệu quả nhiều loại vi khuẩn, đồng thời có thể phân hủy và xử lý vi khuẩn hoặc nấm một cách vô hại. Nó cũng có thể phân hủy một số mùi hôi cuộc sống do hoạt động của con người gây ra.

3.2 Why is TiO2 a photocatalyst for air sterilization?

Người ta tin rằng các đặc tính phân hủy của TiO2 đã được biết đến từ nửa thế kỷ trước. Vấn đề chỉ nằm ở việc xây dựng các ứng dụng mà bây giờ dường như đã được giải quyết. 


Vì vậy, hiện nay titanium dioxide có thể được sử dụng để khử trùng không khí thông qua các ứng dụng khác nhau và một trong số đó là đèn UV.

It can decompose any pollutants and we all can see the increasing health problems in the world. So, climate change is real and so is the TiO2 for air sterilization. 

Nhiều thử nghiệm và nghiên cứu đang cho thấy kết quả có lợi và đó là lý do chúng tôi kiên quyết xây dựng các ứng dụng trong nhà và ngoài trời khác nhau bằng cách sử dụng nó để làm sạch không khí khỏi vi khuẩn.

3.3 Properties of TiO2

Here are the main properties of the TiO2 that you must know to understand the importance of it for UV technology used for air sterilization.


3.4 TiO2 can kill Virus and Bacteria

If you have concerns that the TiO2 can kill bacteria or not, you must know that it does not just kill the cells of bacteria but decompose them. So, not this is one of the most effective photocatalysts as compared to any other agent. 

And if we compare it to the chlorine, the TiO2 is 3 times stronger than that in killing the bacteria. The use of it can reduce or eliminate the polluted compounds in the air such as NOx, cigarette smoke, as well as volatile compounds arising from various construction materials. So, it is eventually a solution for pollutant areas.

3.5 TiO2 is not harmful to humans

The other benefit of titanium dioxide is that it does not penetrate from healthy skin therefore, it cannot damage the human skin or cause any serious health problems like other UV lights.

3.6 UVled+Photocatalyst

In the whole sterilization, TiO2 has the bactericidal effect of photocatalyst under UVA irradiation. Not only can kill the virus, but also reduce the formaldehyde in the room.

uv air solution for mini splits

For viruses not killed by TiO2, UVC can play a supplementary role. Because UVC only provides auxiliary functions and does not require so much energy, it reduces a lot of costs and makes it acceptable to most companies and people. 

The conclusion is that we need a safe and healthy environment to breathe. So, the TiO2 photocatalyst in UV LED lights can impact hugely on human health right now. The ongoing chaos of air pollution is also indicating the presence of many bacterial pollutants in the air and if UVled+ photocatalyst can help us in reducing it then, why not? 

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