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Preparation method and application of a kind of square phase bismuth oxide activated carbon photocatalyst

A technology of photocatalyst and activated carbon, which is applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., which can solve the problems of failure to absorb visible light and achieve low cost and easy operation Simple, to avoid the effect of secondary pollution

Active Publication Date: 2021-09-14
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Catalysts for photocatalytic water treatment in the prior art generally use TiO 2 Supported metal oxide catalysts, but with a band gap of 3.2 eV, can only absorb ultraviolet light and fail to absorb visible light. Therefore, it is necessary to develop a photocatalyst for water treatment that can absorb both ultraviolet and visible light

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  • Preparation method and application of a kind of square phase bismuth oxide activated carbon photocatalyst
  • Preparation method and application of a kind of square phase bismuth oxide activated carbon photocatalyst
  • Preparation method and application of a kind of square phase bismuth oxide activated carbon photocatalyst

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Experimental program
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Effect test

Embodiment 1

[0026] Embodiment 1: a kind of preparation method of square phase bismuth oxide activated carbon photocatalyst, concrete steps are as follows:

[0027] (1) Put the deactivated activated carbon under the conditions of microwave power of 800W and temperature of 600°C for 30 minutes to obtain regenerated activated carbon; the deactivated activated carbon is the deactivated activated carbon treated with anthraquinone, and the particle size of the deactivated activated carbon is The diameter is 180 mesh, and the methylene blue adsorption value is 30mg / g;

[0028] (2) Mix the regenerated activated carbon in step (1) with lysine solution and bismuth nitrate solution evenly, impregnate and react for 180 minutes under stirring conditions, and then place it in microwave roasting for 10 minutes at a microwave power of 700W and a temperature of 500°C. Pros and Cons 2 o 3 -AC photocatalyst; Wherein the concentration of lysine solution is 0.5 g / L, the concentration of bismuth nitrate solu...

Embodiment 2

[0030] Embodiment 2: a kind of preparation method of square phase bismuth oxide activated carbon photocatalyst, concrete steps are as follows:

[0031] (1) Put the deactivated activated carbon under the conditions of microwave power of 1000 W and temperature of 900 °C for 10 minutes to obtain regenerated activated carbon; the deactivated activated carbon is the deactivated activated carbon treated with anthraquinone, and the deactivated activated carbon is The particle size is 200 mesh, and the adsorption value of methylene blue is 45mg / g;

[0032] (2) Mix the regenerated activated carbon in step (1) with lysine solution and bismuth nitrate solution evenly, impregnate and react for 120 minutes under stirring conditions, and then place it in microwave roasting for 30 minutes at a microwave power of 500W and a temperature of 300°C. Pros and Cons 2 o 3 -AC photocatalyst; Wherein the concentration of lysine solution is 0.1 g / L, the concentration of bismuth nitrate solution is 0....

Embodiment 3

[0034] Embodiment 3: a kind of preparation method of square phase bismuth oxide activated carbon photocatalyst, concrete steps are as follows:

[0035](1) Put the deactivated activated carbon under the conditions of microwave power of 1000W and temperature of 800°C for 20 minutes to obtain regenerated activated carbon; the deactivated activated carbon is deactivated activated carbon treated with anthraquinone, and the particle size of the deactivated activated carbon is 200 mesh, methylene blue adsorption value is 45mg / g;

[0036] (2) Mix the regenerated activated carbon in step (1) with lysine solution and bismuth nitrate solution evenly, impregnate and react for 160 minutes under stirring conditions, and then place it in microwave roasting for 20 minutes at a microwave power of 1000W and a temperature of 900°C. Pros and Cons 2 o 3 -AC photocatalyst; Wherein the concentration of lysine solution is 0.1 g / L, the concentration of bismuth nitrate solution is 0.15mol / L, the soli...

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Abstract

The invention relates to a preparation method and application of a square-phase bismuth oxide activated carbon photocatalyst, belonging to the technical field of photocatalysts. In the present invention, the deactivated activated carbon is placed in a microwave power of 800-1000 W and a temperature of 600-900°C for a constant temperature reaction for 10-30 minutes to obtain the regenerated activated carbon; the regenerated activated carbon is mixed with lysine solution and bismuth nitrate solution evenly and Impregnated under stirring conditions for 120-240 min, and then placed in microwave roasting for 10-30 min at a microwave power of 500-1000W and a temperature of 300-900°C to obtain the square phase Bi 2 o 3 ‑AC photocatalyst. The invention uses the deactivated activated carbon as the carrier of the metal oxide, prepares the bismuth oxide activated carbon photocatalyst of the square phase, improves the adsorption capacity and can degrade the dye in the dye wastewater under the irradiation of visible / ultraviolet light.

Description

technical field [0001] The invention relates to a preparation method and application of a square-phase bismuth oxide activated carbon photocatalyst, belonging to the technical field of photocatalysts. Background technique [0002] Activated carbon has excellent properties such as developed pore structure, high specific surface area, and recyclability. It is a good adsorbent and can be widely used to treat industrial wastewater. After a period of use, a large amount of deactivated activated carbon will be produced due to the deactivation of activated carbon. If deactivated activated carbon cannot be used efficiently, it will have a serious impact on the environment and human health, so the treatment of deactivated activated carbon has become an inevitable trend. [0003] Bismuth oxide (Bi 2 o 3 ) is a P-type semiconductor material, and the crystal forms included are monoclinic α-Bi 2 o 3 , tetragonal β-Bi 2 o 3 , cubic γ-Bi 2 o 3 and δ-Bi 2 o 3 . Bi 2 o 3 It is c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/18B01J35/10B01J37/02B01J37/08B01J37/34C02F1/30C02F101/38C02F101/30
CPCB01J23/18B01J35/004B01J35/1004B01J37/0203B01J37/086B01J37/346C02F1/30C02F2101/308C02F2101/40C02F2305/10
Inventor 夏洪应严恒张利波蒋鑫张奇胡文海
Owner KUNMING UNIV OF SCI & TECH
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