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Preparation method and application of Bi24Ga2O39 photocatalyst

A bi24ga2o39, photocatalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of insufficient catalytic performance, harsh reaction conditions, and insufficient purity, etc. problems, to achieve good photocatalytic performance, good application prospects, and good crystallinity

Inactive Publication Date: 2019-01-15
ZHOUKOU NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Bi 24 Ga 2 o 39 In the preparation method of the solid phase method, there are disadvantages such as long process time, high cost, insufficient purity, large particle size and insufficient catalytic performance; while the hydrothermal method can obtain particles with high purity and good crystal form, but the equipment requirements High, harsh reaction conditions
At present, the preparation of Bi by sol-gel method 24 Ga 2 o 39 research has not yet been reported

Method used

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  • Preparation method and application of Bi24Ga2O39 photocatalyst
  • Preparation method and application of Bi24Ga2O39 photocatalyst
  • Preparation method and application of Bi24Ga2O39 photocatalyst

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preparation example Construction

[0037] A Bi 24 Ga 2 o 39 The preparation method of photocatalyst comprises following preparation steps,

[0038] (1) Dissolving bismuth nitrate and citric acid in ultrapure water to form a bismuth nitrate-citric acid suspension;

[0039] (2) Dissolve EDTA in concentrated ammonia water to form EDTA-ammonia solution;

[0040] (3) Slowly add the solution prepared in step (2) dropwise to the bismuth nitrate-citric acid suspension prepared in step (1) under magnetic stirring to obtain bismuth nitrate-citric acid-ethylenediaminetetra Acetic acid-ammonia solution;

[0041] (4) Add gallium nitrate aqueous solution slowly to the solution prepared in step (3), and heat and stir in a water bath until a transparent gel substance is formed. The molar ratio of gallium nitrate and bismuth nitrate in step (1) is 1:12;

[0042] (5) Heat the gel substance obtained in step (4) at 300°C for 2 hours, grind it to powder after cooling, and then roast it in a muffle furnace to obtain Bi 24 Ga ...

Embodiment 1

[0044] Bi 24 Ga 2 o 39 The preparation method of photocatalyst, it comprises the following steps:

[0045] (1) Bismuth nitrate-citric acid suspension was prepared according to the ratio of bismuth nitrate, citric acid and ultrapure water as 2mmol:8mmol:5mL;

[0046] (2) According to the proportion of EDTA and concentrated ammonia water is 8mmol:5mL to prepare EDTA-ammonia solution;

[0047] (3) Slowly add the solution prepared in step (2) dropwise to the bismuth nitrate-citric acid suspension prepared in step (1) under magnetic stirring to obtain bismuth nitrate-citric acid-ethylenediaminetetra Acetic acid-ammonia solution;

[0048] (4) Slowly add 50mmol / L gallium nitrate aqueous solution to the solution prepared in step (3), and heat and stir in a water bath at 80°C until a transparent gel substance is formed; gallium nitrate and bismuth nitrate in step (1) The molar ratio is 1:12;

[0049] (5) Heat the gel substance in step (4) at 300°C for 2 hours, grind it to powder ...

Embodiment 2

[0051] Bi 24 Ga 2 o 39 The preparation method of photocatalyst, it comprises the following steps:

[0052] (1) Bismuth nitrate-citric acid suspension was prepared according to the ratio of bismuth nitrate, citric acid and ultrapure water as 2mmol:8mmol:5mL;

[0053] (2) According to the proportion of EDTA and concentrated ammonia water is 8mmol:5mL to prepare EDTA-ammonia solution;

[0054] (3) Slowly add the solution prepared in step (2) dropwise to the bismuth nitrate-citric acid suspension prepared in step (1) under magnetic stirring to obtain bismuth nitrate-citric acid-ethylenediaminetetra Acetic acid-ammonia solution;

[0055] (4) Slowly add 50mmol / L gallium nitrate aqueous solution to the solution prepared in step (3), and heat and stir in a water bath at 80°C until a transparent gel substance is formed; gallium nitrate and bismuth nitrate in step (1) The molar ratio is 1:12;

[0056] (5) Heat the gel substance in step (4) at 300°C for 2 hours, grind it to powder ...

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Abstract

The invention provides a preparation method and application of a Bi24Ga2O39 photocatalyst, wherein the preparation method is a sol-gel method. The preparation method is simple and safe to operate andconvenient for mass production. The Bi24Ga2O39 photocatalyst prepared by the method has high photocatalytic activity and can rapidly degrade organic dye wastewater.

Description

technical field [0001] The invention belongs to the technical field of new materials for organic dye wastewater treatment, in particular to Bi 24 Ga 2 o 39 Preparation method and application of photocatalyst. Background technique [0002] Organic dyes in water mainly come from industries such as papermaking and printing and dyeing. It not only affects the chroma of water, but also greatly increases the chemical oxygen demand of water, which seriously affects the purification ability of water. Dye wastewater has the characteristics of complex composition, high chroma, and biological toxicity. Traditional methods of adsorption, separation, and biological treatment to treat organic wastewater have disadvantages such as long cycle, high treatment cost, and difficult treatment. Therefore, the use of green, efficient, and low-cost advanced oxidation technology to treat organic printing and dyeing wastewater has a good application prospect. Photocatalytic technology has receive...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/18C02F1/30C02F101/30
CPCC02F1/30B01J23/18C02F2101/308C02F2305/10B01J35/39
Inventor 刘进钟倩李俐俐王振领
Owner ZHOUKOU NORMAL UNIV