Iron tube and air purification device

The invention relates to the field of air purification, and discloses an ion tube and air purification device. The ion tube comprises a cylindrical tube body, a cathode and an anode, wherein the cathode is positioned in the tube body, the anode is positioned outside the tube body, the cathode is a first metal net electrode or a metal tube electrode which is arranged on the inner wall of the tube body, the anode is a second metal net electrode which is arranged on the outer wall of the tube body, the two ends of the tube body are both formed as open ends, and the two open ends are closed through plugs or caps. According to the ion tube, the organic compound can be decomposed into water, carbon dioxide and basic molecular components of related metal oxides in an ionization mode, so that effective purification of VOC is realized, and secondary pollution is avoided; and in addition, the two ends of the tube body are respectively provided with the open ends, so that the two ends of the iontube can be effectively f