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Preparation method of silver phosphate/silver bromide composite photo-catalyst

A technology of composite light and silver bromide, which is applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of expensive, harsh reaction conditions, tedious operation steps, etc., and achieves low production cost, Easy to operate effect

Active Publication Date: 2017-06-20
NORTHEAST DIANLI UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These preparation methods usually require the addition of expensive reagents, or are realized through harsh reaction conditions and cumbersome operating steps.

Method used

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  • Preparation method of silver phosphate/silver bromide composite photo-catalyst
  • Preparation method of silver phosphate/silver bromide composite photo-catalyst
  • Preparation method of silver phosphate/silver bromide composite photo-catalyst

Examples

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Effect test

Embodiment 1

[0021] 90mmol 85wt% phosphoric acid was dissolved in 2400mL deionized water, and 75mmol AgNO 3 , dissolved after magnetic stirring. 1125mmol urea was added to the solution, and the solution was magnetically stirred for 30 minutes at room temperature. The solution was transferred to a stainless steel reactor with a tetrafluoroethylene liner, placed in an oven at 80°C, and reacted for 24 hours. After the reaction, cool to room temperature, filter and separate the product with a vacuum pump, wash with deionized water, and dry at 70°C for 12 hours to obtain Ag 3 PO 4 product.

[0022] The photocatalytic property experiment was carried out in a jacketed photocatalytic reactor, using a 500W xenon lamp as the light source (with a 420nm filter), and the light source was perpendicular to the middle of the reactor, 10cm away from the reactor. In the photocatalytic reactor, take 0.2g Ag 3 PO 4 Place in 100mL rhodamine B solution with a concentration of 10.0mg / L, stir magnetically i...

Embodiment 2

[0024] (1)Ag 3 PO 4 preparation of

[0025] Dissolve 90mmol 85% phosphoric acid in 2400mL deionized water, add 75mmol AgNO 3 , dissolved after magnetic stirring. 1125mmol urea was added to the solution, and the solution was magnetically stirred for 30 minutes at room temperature. The solution was transferred to a stainless steel reactor with a tetrafluoroethylene liner, placed in an oven at 80°C, and reacted for 24 hours. After the reaction, cool to room temperature, filter and separate the product with a vacuum pump, wash with deionized water, and dry at 70°C for 12 hours to obtain Ag 3 PO 4 product.

[0026] (2)Ag 3 PO 4 Preparation of / AgBr Composite Photocatalyst

[0027] 4.0 g of Ag at room temperature 3 PO 4 Grind in a ball mill for 10-20 minutes (as shown in Table 1) with a certain mass of NaBr according to different molar ratios (as shown in Table 1), the ball milling speed is 200-300r / min, and the mass ratio of agate balls to raw materials is 2: 1. The atm...

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Abstract

The invention relates to a preparation method of a silver phosphate / silver bromide composite photo-catalyst. The invention process comprises the following steps: grinding Ag3PO4 and NaBrfor 10-20min in a ball mill under the rotating speed of 200-300r / min according to a certain mole ratio under normal temperature, enabling the solid particles to generate chemical reaction under the mechanical force effect so as to obtain AgBra, dissolving redundant NaBr by use of deionized water so as to obtain the Ag3PO4 / AgBr composite photo-catalyst. By controlling the mole ratio of the reactant, the rotating speed and the grinding time of the ball mill, the Ag3PO4 / AgBr composite photo-catalysts in different mole ratios can be prepared. By adopting the chemical chemistry method for preparing the Ag3PO4 / AgBr composite photo-catalyst, the Ag3PO4 / AgBr composite photo-catalyst can be prepared by grinding through the ball mill under low rotating speed and short time condition, the operation is easy, and the production cost is low.

Description

technical field [0001] The invention relates to a preparation method of a silver phosphate / silver bromide composite photocatalyst, in particular to a 3 PO 4 and NaBr as raw materials, the mechanochemical method is used to prepare Ag with high catalytic efficiency at room temperature by controlling the molar ratio of the reactants, the speed of the ball mill and the grinding time 3 PO 4 A new approach to Ag / AgBr composite photocatalysts. Background technique [0002] Photocatalyst has the advantages of complete degradation of organic pollutants, no secondary pollution, easy operation, etc., and has been widely studied and applied. Ag 3 PO 4 As an emerging photocatalyst, the quantum efficiency reaches 90% when the light absorption wavelength is greater than 420nm, and it has the ability to efficiently degrade organic pollutants. But Ag 3 PO 4 It is slightly soluble in water and has characteristics such as photochemical corrosion, which affects its stability and photoca...

Claims

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Application Information

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IPC IPC(8): B01J27/18B01J35/00B01J37/04C02F1/30C02F101/34C02F101/36C02F101/38
CPCC02F1/30B01J27/1817B01J37/0036C02F2101/36C02F2101/34C02F2101/38C02F2305/10B01J35/39
Inventor 张晓君于大禹乔楠颜克强蒋函锦
Owner NORTHEAST DIANLI UNIVERSITY
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