Antibacterial agent and fiber treated with same

The invention discloses an antibacterial agent. The antibacterial agent comprises a nano-mesoporous material and a silver ion compound loaded in mesopores of the nano-mesoporous material, and the nano-mesoporous material comprises at least two of mesoporous nanosilicon dioxide, mesoporous nanometer titania, mesoporous nano-aluminum oxide and mesoporous nano-zinc oxide. The antibacterial agent has the advantages that the nano-mesoporous material is adhered to the silver ion compound to play a role in slowly releasing silver ions, mesoporous nanometer titania in the nano-mesoporous material can also play a durably antibacterial role, water molecules in the environment are adsorbed by adding the mesoporous nanosilicon dioxide, and antibacterial performance of the mesoporous nanometer titania is guaranteed; and secondly, the fiber adopts a crossed specially-shaped structure, the surface area is increased, water absorption performance of silicon dioxide and antibacterial performance of titanium dioxide are improve