Device and method for purifying air purification device and method

An air purification device comprising:

• a reactor having a hollow shape and extending in one direction;
• a discharge plasma generator comprising a first electrode disposed on an outer wall of the reactor and a second electrode disposed inside the reactor, wherein the discharge plasma generator is configured to generate a discharge plasma in a discharge region;
• a plurality of dielectric particles disposed on a packed-bed of the reactor;
• a liquid supplier which supplies a liquid between the first electrode and the second electrode;
• and
• a liquid recoverer which recovers the liquid discharged from the reactor,
• wherein the plurality of dielectric particles are disposed between the first electrode and the second electrode.