Application of Sodium Ammonium Hydrogen Phosphate_Industrial Additives

Background and overview^[1]

Sodium ammonium hydrogen phosphate is also known as “Xiaotiandi salt”. It is colorless transparent crystals or white particles. It can be obtained by the reaction of ammonium chloride and disodium hydrogen phosphate. It can be used for the quantification of uranium salts, the determination of magnesium and manganese, etc.

Apply^[2]

CN201310455691. >4/Ag₃PO₄ visible light photocatalytic material. The material prepared by this method is a light yellow powder with a graphene-like layered nano/micron spatial structure. The specific preparation steps are as follows:

Ⅰ. Weigh 10~20g of analytically pure urea into an alumina crucible with a cover, place it in a muffle furnace at a constant temperature of 350~℃ for 1~1.5h, and then roast it at a certain temperature for 1.5~2h to prepare a light Yellow C₃N₄ powder;

Ⅱ. Disperse 0.1g C₃N₄ in 30mL distilled water and disperse it ultrasonically for 30 minutes to obtain dispersion 1;

Ⅲ. Under magnetic stirring conditions, add analytically pure AgNO₃ into dispersion 1, and stir at room temperature for 30 minutes to obtain dispersion 2;

IV. Add 0.03~0.07 mol/L sodium hydrogen phosphate solution drop by drop into dispersion 2 under stirring, and continue stirring the resulting turbid liquid for 1 hour;

V. After centrifugal separation of the precipitate obtained in step IV, wash it with distilled water more than two times, and dry it in an air atmosphere at 60°C to prepare C₃N₄/Ag₃PO₄ visible light photocatalytic material.

The advantages of this method are:

1) Highly active C₃N₄/Ag Clariant pigment ₃PO4Visible light photocatalytic materials;

2) The prepared C₃N₄/Ag₃PO₄ visible light photocatalytic material has Graphene-like layered nano/micron spatial structure with large specific surface area;

3) Prepared C₃N₄/Ag₃ Cabot White Carbon Black PO₄ After the visible light photocatalytic material is regenerated by H₂O₂ treatment, it has good photocatalytic activity and good stability under visible light irradiation, realizing its application in Recycling in the photocatalytic process;

4) Using H₂O₂ regeneration can easily achieve high activity C₃N₄/Ag ₃PO₄ Harmless treatment of toxic and refractory organic pollutants in water under visible light irradiation.