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It appears this is an older model, but the technology is the same. UV-A light from LEDs is shone onto titanium dioxide and causes a photocatalytic reaction that involves hydroxyl radicals and other reactions that deactivate viruses, bacteria and fungal spores.
This version is designed for cars or other small spaces, and is powered by a USB C cable. This unit uses around 1.4W, but a newer version has more LEDs and uses around 2W.
In operation it is virtually silent, as it just circulates air at low level through an active mesh.
The mesh material may be foamed nickel treated with titanium dioxide. It is apparently much more efficient than the older coated honeycomb materials.
The instructions with the unit encourage you to pop the mesh out of its frame from time to time, wash it and then dry it with a hairdryer before putting it back in.
Titanium Dioxide is a very common material used in paints as a brilliant white pigment. It is also classed for use in food at low levels, although there is some controversy as to whether it is safe. That includes some suspicious science and rumours about nano-particles getting into children's brains. (Won't somebody think of the children.) It's hard to tell if this science is the product of career narcissists or if it has validity. Especially when you can type in almost any food ingredient and find the same sort of scaremongering.
This is one of these things that I can't actually prove whether it works or not without extensive lab testing. The technology does appear to be real, but there's no visible effect, as it is working at atomic level on invisible stuff like bacteria and viruses.
I'll try to get one of the new units to compare the insides.
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This is an ozrum air purifier. I it turns out. I've got a slightly older model, but that's okay. The technology is the same.

Let me show you what's inside. This was suggested, incidentally, by zander. Thank you xander and come across this particular version, but this is designed for cars and trucks or vans or whatever, and it basically it claims to get rid of everything, but we'll see when, when we take a look at it, the blurb for it. Well, let me read some of the blurb for it.

Their official documentation says audram earzing mini air purifier ajuram's, er, zing mini is an innovative solution to help purify the air within vehicles using audram's extensive knowledge around uv light. The herzing mini draws. An iron passes it over a titanium dioxide plate that combines, with uva light to produce a photonic catalytic reaction. This reaction removes harmful bacteria and viruses from the air.

It also suggests it can remove bad smells and it leaves it with fresh, clean air. It's a controversial subject really this one, it says, contains number of led 11 mine does not contain 11 leds, but you'll see what's inside. Oh, there is a. There is a graphic as well look here: here's here's how it works.

Um all the polluted air with allergens and formaldehydes and bacteria it gets sucked in and then the ultraviolet energy goes and then it splits everything into separate molecules and atoms. Then it comes out clean air. That's it amazing right, let's open it up! Well, let's power up! Actually so i've got a little power supply here. It is designed for vehicular use.

So it's got this magnetic mount, so you can just mount it and stuff the air is pulled in from the base and it blows out the top. It's got a little fan knit. Let's plug it into a power analyzer and see: what's a power it is taking, gets the plug-in the right way around plugs in it's very quiet. It is drawing approximately 270 milliamps.

That's not a lot! Okay. Now, if you've been at cap, the bottom off, while it's on it, reveals the important titanium dioxide, photocatalytic, converter and also, if you just put your fingernail under there and lift this out, it shows the uv la a leds. Now these are actually uva leds. They look quite looking at them very pale, bluish white, but when you point at this well, let's see if i can, let's turn the light off right, uh, right and i'll take the exposure off for extra drama yeah.

It is actually making things fluorescent quite brightly. It's making everything fluoresce quite brightly, so these little leds in here really are they're very much the uv, a type leds reminiscent of the nail varnish jars. Now, if you actually put it through, let's not try that again. If you put it through this little filtering point, it puts this lovely pattern out uh more about the pattern in a moment, because i took a picture of this filter right, tell you what uh watch your eyes.

The light is coming back. The light is back. Let's move this out the way, so the concept. This is that when you stimulate it it's commonly known, i don't know how accurate this is.

You guys can. Let me know, because some of you are true rocket scientists in all areas like this, but this material here is titanium dioxide. Now the strange thing is: here's what i think of titanium dioxide as a white powder. It's used as a food additive.

It's used as a paint additive, it's basically an extremely white pigment, but it turns out that when you fire a uv light at it, it causes a photocatalytic reaction. The surface photocata photocatalysis uh. This is very odd. This is almost like a metal mesh.

I don't see any white on it at all. You guys can. Let me know about this, because this well i'll show you um. I did take a picture.

I took a picture of the filter and it looked like this. Let's zoom down on that zoom and if you want to see it closer, i took an even more detailed picture and when you get up close, it's almost like a spongy, it's like metal and it's sponge and they actually say that every so often you should pop Out the frame that to me that seems like it's going to risk damaging it, but they say pop it out this frame and wash it to get all the impurities off it and then dry it with a hair, dryer or whatever, and then pop it back in And when you take it out, it is a it's a spongy mesh, i'm not going to squeeze it too much because i damage it, but a set caliper shows that it's quite thick, it's about two millimeters thick, so two millimeter thick sponge mesh, but still doesn't look Very white yeah, i'm not sure anyway, let's open this up, i shall hold on. I shall provide something hold on. I'm just going to focus on this just to bring bring the focus up to a predictable level without having to swear at the camera.

Uh, like ave, does in such a regular basis. So let's unscrew this to see what's inside, i don't think there's a lot uh. I guess that the new version has more of these leds. I shall test these leds uh.

The current was only about 270 milliamps. Wasn't it one two three four about 50 milliamps, each plus a wee bit for the fan in the back? Hmm? Is there going to be any fancy circuitry? There doesn't really need to be unless i get fancy current regulation, although i do see resistors in the series with the leds right tell you what i'm going to take a picture of this and then we'll explore it in more detail. One moment please and continue right. Well, here's a circuit board picture uh.

What we have here is a usbc port. We've got a fuse and a diode. The diode is across positive and negative. So if it does somehow end up wrong polarity, it will basically blow that fuse.

That's worth mentioning. There is a 5.1 k, resistor here, five one, two, five one and two zeros, and it is to dip the usb port into providing power to this. It signals to that. It's a device that should be powered.

Then we've got the leds with a 24 ohm resistor. In each series, each one and we've got the fan over here, but there's also a 510 ohm resistor, that's five one and a one zero after it, five one one, and that is in series these pads, which i presume is for an led, because in other versions Of this, the auderian bit in the front looks as though it may light up. So this circuit board is maybe designed for that. It's really not that complicated uh.

It is roughly 50 milliamps across these leds with that resistor set there around about three volts across led just over that and the rest is from the 5 volt supplies dropped across the 24 ohm resistor, and that is it uh leds shine on photocatalytic conversion. Material then creates hydroxyl, radicals and stuff like that, and it uh and destroys bacteria odors and total volatile organic compounds, and all these things i have to say their marketing looks very much like sharp plasma cluster marketing. The fan it seems like it's like the circuit board, is right up against the fans, so it's restricting the airflow through quite significantly, but it doesn't really matter because this unit is ultimately it's designed for very low air throughput and the air is being taken in from The base here and pulled through the mesh and exposed to the leds in contact with the mesh and then expelled by the fan through this air outlet here that is it uh, there's not really much else to say it's extremely simple, i'm gon na have to maybe To see if i can get one of the more modern ones and see what the difference is, i wonder if they live in leds, i wonder if any of them are the ones that are counting the ones that are under here under the logo. I'm so cynical that way haven't i, but there we go.

So let me know what you think: why is the titanium dioxide plate, this strange, spongy, mesh fight and solution, d, transparently mesh? Why is it just metallic looking instead of the the very white that i'd normally associate with that? Incidentally, they've experimented with putting things like titanium dioxide into roofing tiles and stuff, like that, on the basis that, when the sunlight hits it because when sunlight hits, it has the same effect because it's quite a broad spectrum. It's uh. It causes that photocatalytic reaction and can supposedly remove computers from there, but then you also have to consider that the the flat earthers have moved into this as well the the usual the bedwetters, the cairns is that a derogatory, maybe they're right but uh, saying it harms. Kids, with nanoparticles going into their brains because it's used as a food coloring is scaremongering.

It's the sort of stuff they come out with, like 5g death, beams and stuff like that, but not to worry um. So what do you guys think? What are your thoughts on this technology? Is it real? Does it work? I mean it's supposed to you: get systems for in vent and air ducts in america, in their heating systems and general air conditioning systems, and it seems like if this is true - and you can just wash this every so often and it just replenishes it, then that Would be great or does does it degrade over time? Let me know what you think it'd be really interesting to know.

12 thoughts on “Inside an osram airzing photocatalytic air purifier”
  1. Avataaar/Circle Created with python_avatars jaylang11 says:

    i have an air purifier that uses a "cold catalyst" prefilter. not sure if its the same thing, same claims about what it does. no UV tho. its a hathaspace filter i found on amazon, is it all mumbo jumbo? i got it for the good hepa.

  2. Avataaar/Circle Created with python_avatars A Cole says:

    I would assume that it increases surface area for more reactivity. A small volume but large surface area due to the porous nature. This would increase the reaction rate. It is very good at reacting with organic chemicals but poor with inorganic.

    When UV radiation at energies larger than the band-gap energy of the TiO2 crystal (3.2 eV for anatase; 3.03 eV for rutile) is absorbed by the catalyst, an electron is promoted to the conduction band, creating a pair of a negatively-charged free electron and a positively-charged electron hole. The electron-hole pair migrating to the TiO2 surface has strong reducing and oxidizing activities. The hole in the valence band reacts with water to produce hydroxyl radicals (.OH). From "Application of ultraviolet light assisted titanium dioxide photocatalysis for food safety: A review".

    I imagine the filter should be removed and washed as the material from the above reaction would be somewhat attached or reacted with the mesh. By washing it you physically remove material This "recharges" the TiO2.

    The ROS can disrupt and damage cell functions and structures, and cause chemical modification or cleavage of the DNA and cell membrane. UV-A, UV-B, and UV-C light sources were used with TiO2 and it was shown that the combination led to structural changes in the super-coiled plasmid DNA and genomic DNA of E. coli. Photocatalysis is not limited to application of UV-C light. When combined with UV-A, and UV-B, TiO2 has proved to be less effective than UV-C for inactivation of pathogenic bacteria, E. coli. From "Application of ultraviolet light assisted titanium dioxide photocatalysis for food safety: A review".

  3. Avataaar/Circle Created with python_avatars BobEckert56 says:

    Google says the entire company name is osram Sylvania and it's a German company which among other things produces light based treatment products. I'm seriously skeptical. I think this might be produced by the osram Sylvania scam division.

  4. Avataaar/Circle Created with python_avatars Elminator666 says:

    Titanium Dioxide is a pain. I work at a paint factory and we had a TiO2 contamination in a tank and it ruined like 3 batches of expensive automotive paint.

  5. Avataaar/Circle Created with python_avatars PushyPawn says:

    I am slightly suspicious about that filter, and the claims about what's it's made of.
    I would like to test it in my highly scientific toilet chamber, to see if it does anything at all.
    Something tells me that many more that just one would be needed to combat the fumes my body generates.

  6. Avataaar/Circle Created with python_avatars Mark Fergerson says:

    Probably entirely irrelevant to the silly thing, but I want to know why the board is marked "EUMarket"? Did someone change the USB or automotive voltage standards and not tell me?

  7. Avataaar/Circle Created with python_avatars nigozeroichi2501 says:

    With its size, and the fact that it's only going to run while the car is running AND while driving even with the cars blower turned off some air still comes from the vents and small holes and such in the car, it's not going to make any difference besides you having a little less money from buying it.
    Also I used to work at a car rental, if people can stink up a rental car in a few days, I hate to think what their own cars are like and that little think won't put even the tiniest dent in the stink

  8. Avataaar/Circle Created with python_avatars tweake says:

    the simple problem with these gadgets is they are ridiculously to small to do anything. considerer how much air flow goes through a car cabin when your driving. its cleaning 100,000th of that.
    same thing with the ones in ducts etc, airflow is way to high for the size of the units/leds.

  9. Avataaar/Circle Created with python_avatars Ray Ceeya says:

    So is this an air purifier or an ozone generator? It makes me think it's an ozone generator but I've never seen one like this before. Or maybe it's just bullshit.

  10. Avataaar/Circle Created with python_avatars Robert Blethen says:

    All three of my heat pump interior heads units came with two of those to install. They were labeled for deodorizing. Looked like the exact same color material.

  11. Avataaar/Circle Created with python_avatars Bill Kerr says:

    Years ago I examined some large photocatalytic air purifiers made by a company that no longer exists. They seemed well made and well documented and included a HEPA filter. These units were designed to be installed in medical offices and hospitals. Those units used UV-C tubes that had an aluminum grid with 1/2" openings before and after the array of 2 or 4 UV bulbs. The grid was similar to those sometimes found over office fluorescent light fixtures. The grid was painted with a titanium dioxide paint that had a coarse texture. The HEPA filter was mounted downstream of the lights and grids and was made to fit the inlet of an HVAC air handler. I assumed the UV-C did all the work and the catalysis was bunk.

    I have used an open pore polyester filter material that would look just like the filter you have if it had been sprayed with a light coating of white paint. As you mention, white paint is usually pigmented with titanium dioxide. I very much doubt that the UV-A does anything useful, but I've been wrong before. Once. In 1981.

  12. Avataaar/Circle Created with python_avatars GiddeonFox says:

    It's probably just a titanium metal mesh. Titanium is one of those metals that forms a passivation layer in air, so that's where the titanium dioxide would come from.

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