You could, but they would not be the most efficient choice if you are aiming on easily obtainable and cheap materials, filters from air purifiers will do the job much better.
Hi dedan. I've just made my filter out of a charcoal filter that goes in a cooker extractor fan. it was £2.99 for a pack of 3 (550mm x 350mm) in local cooker/electrical shop. And 2 wire coat hangers and electrical tape. I'm going to fit it tomorrow so I'll take a few pix if i get a chance and stick em on my journal with some instructions for everyone to look at