I do not think any air purifiers can fit inside your face mask. I assume in room air purifiers will capture some as they are particles like others that get caught in filters.
The disposable masks were such a shame. We ingested and breathed in the plastic. Then once discarded, it is just plastic pollution.
There's literally no evidence that they shed nano-plastic particles in regular use. Also they need to be disposable to be useful, they're filters which trap things you don't want in your lungs. Also, if you put them into the regular trash, they just go to a land fill, which is totally fine.