The preparation methods include antimony trioxide hydrogen peroxide method, potassium antimonate (sodium) ion exchange method and potassium antimonate (sodium) gel sol method.
Potassium antimonate (sodium) gel sol method adds water to sodium antimonate, stirring and dispersing at a concentration of 0.3g/m1, adding 35% hydrochloric acid under stirring, heating to 40 ℃, reacting for 4 hours, and generating antimony pentoxide gel slurry. After filtration and separation, pure water washing, adding human pure water to the obtained antimony pentoxide filter cake, adding triethanolamine, heating to 75 ℃ for degelling for 5 hours, and preparing antimony pentoxide sol product.