This invention relates to an air purification apparatuses and methods for air purification. The air purification apparatuses pass air through energy beams that form one or more fields of energy within a chamber to produce an outflow of sterilized air. In some aspects, a charge generation system is implemented to repel particles from the chamber walls. In some aspects, the fields of energy extend across substantially an entirety of the cross sectional area of the interior volume of the chamber and longitudinally within the chamber. In some aspects, a controller is configured to rotate a beam of collimated light energy within the chamber at a rotational velocity corresponding to at least V/W, wherein V is the linear velocity of a particle within the chamber along the longitudinal axis, and W is the width of the beam of collimated light energy.
