Could Ionised Air be used as Propellant in Ion Thrusters?

NASA’s deep space missions have used xenon as a propellant in ion thrusters, however the force they produce has been limited to hundredths of a newton. Is there an alternative fuel which could be used to provide greater thrust force? For example, if air in the earth’s atmosphere could be ionised, would accelerating the $O_2^-$ and $N_2^-$ provide a greater thrust force? In case of air ionisation, would the methods used in air purifiers be a viable option to produce ionised propellant, as described here:

… Corona ionization, which uses an electrical current to create bipolar ionized air. The ionizer applies a high-voltage electrical current composed of a flow of negatively charged electrons, to a metal prong or needle. Electrostatic repulsion causes the electrons to detach from the prong or needle, attaching themselves to the molecules of nitrogen and oxygen in the air, forming negative ions … Corona ionization can further be divided into AC and DC. AC or alternating current ionization uses one emitter to produce both positive and negative ions … DC or direct current uses separate positive and negative power supplies that run simultaneously to create bipolar ions. DC ionizers are more efficient at producing ions and use lower operating currents …

source: https://blog.gotopac.com/2013/04/17/air-ionization-how-it-works/