An antimicrobial material, antimicrobial devices and method of reducing or eliminating microorganisms from a fluid susceptible to contain microorganisms is presented. The antimicrobial material is comprised of a porous activated ceramic substrate a titanium dioxide layer covalently bound to the ceramic substrate and a silver salt layer covalently bound to the titanium oxide layer. This antimicrobial material is used in the antimicrobial devices and methods to reduce or eliminate microorganisms in fluid.