Although wide ranges of fibrous filters are available, tailoring mechanically robust, and multifunctional (adsorb toxic gases, potent antibacterial, anti-corrosive, etc.) polymeric nanofibres has presented unusual potential for use in many novel filtration applications. Among the several nanofibre production techniques that have evolved over the past several years, electrospinning is considered the most promising, simple and highly productive process. Additionally, nanofibres with well-defined surface properties can be produced by chemical/physical activation using various activation agents/dopants based on the available functional groups. This ability to modify the surface properties of nanofibrous membrane, serve as an effective platform for toxic gas adsorption, and other related filtration applications. This review will present a brief overview of electrospinning polymeric materials, details of already existing air filtration/purification technologies and the advances/practical options through the novel nanofibrous/nanonet membrane (benefits and drawbacks) to enlarge the potential applica-tions of nanofibrous membrane for an enhanced air filtration/purification performance.