Air Purifiers

are air purfiers any good. do they also collect dust in the air, because i want one that will collect dust. any models or ideas. thanks again.
or what is a good one

Do the - models (available at Lowe’s or Home Depot, for example), really work?

There are many models of little battery operated fridge air purifiers available, but there aren’t many reviews that I can find. These things ionize the air and create small amounts of ozone that are supposed to keep mold, bacteria and odors to a minimum. Are they worth buying or should one just stick with the old baking soda in the fridge standard?
Ok, so a box of baking soda isn’t the gold standard, but has anyone out there tried one of the fridge air ionizers?

i ve just went to the doctor regarding my sinusitis; and he said i should buy an air cleaner…however there is a lot of models said that it is an air purifier….i just wondering what is the difference between them ? and which one is better to reduce my sinusitis (which has become polip) problem