Particulate matters removal by using cotton coated with isomeric metal-organic frameworks (MOFs): Effect of voidage of MOFs on removal

•Isomeric MOFs were firstly applied to capture particulate matters (PMs) from air.•Three isomeric MAFs (MAF-5, -6 and -32) were applied to understand basics of PM removal.•Removal efficiency and quality factor of MAFs increased linearly with increasing voidage.•MAF-6 was highly effective in PM removal compared with MOFs like ZIF-8 and UiO-66.•PM removal might be explained with contribution of small functional groups of PMs.