Fiberglass filter element containing zinc oxide-based composite nanoparticles and method for producing the same

A method for producing a fiberglass filter element, comprising:

• preparing a zinc ammonia complex precipitate by a reaction between ammonia water and a solution of a zinc source in ultrapure water;
• preparing 4.0 to 8.0 mol/L of a precursor solution of zinc oxide-based composite photocatalytic nanoparticles by dispersing the zinc ammonia complex precipitate into 6 mg/mL of a solution comprising photocatalytic nanoparticles (B), (C) and (D) using ammonia water and ultrapure water;
• preparing a uniform pulp by uniformly dispersing two or more kinds of superfine fiberglass cottons with different diameters into the precursor solution by a fiber dissociator;
• processing the pulp into a paper by a paper machine, immersing the paper with an adhesive system, and drying the paper;
• subjecting the paper to a microwave reaction to allow the zinc oxide-based composite photocatalytic nanoparticles to grow in-situ and adhere uniformly on superfine fiberglass to obtain a fiberglass filter paper;
• subjecting the fiberglass filter paper supported with the zinc oxide-based composite photocatalytic nanoparticles to drying and an annealing treatment;
• and
• pleating the fiberglass filter paper by a pleating machine to obtain the fiberglass filter element.