Hollow tubular nano barium sulfate as well as preparation method and application thereof

The invention discloses hollow tubular nano barium sulfate as well as a preparation method and application thereof, and the preparation method comprises the following steps: S0, adding 0.05-0.6 part by mass of EDTA-2Na and 0.05-0.2 part by mass of phosphate into 10-30 parts by mass of barium carbonate slurry, and fully and uniformly mixing to obtain a pre-reaction mixture; the method comprises the following steps: S1, preparing 3-8 parts by mass of a sulfuric acid solution with the concentration of 3-8 wt%; s2, adding 0.05 to 0.7 part by mass of EDTA-2Na (Ethylene Diamine Tetraacetic Acid) and 0.01 to 0.05 part by mass of sodium octadecyl sulfonate or sodium octadecyl sulfate into 500 to 1000 parts by mass of water to prepare a bottom water mixture; s3, adding the pre-reaction mixture and a sulfuric acid solution into the bottom water mixture, and controlling the pH value to be 2.0-2.2 during adding; s4, fully stirring the mixture in S3 for full reaction to obtain a reacted mixture; and S5, filtering, washing