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Bi2O2CO3-BiPO4 composite photocatalyst and preparation method thereof

A photocatalyst, composite technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., to achieve the effect of improving photocatalytic performance and improving separation efficiency

Inactive Publication Date: 2015-10-14
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Currently, for Bi 2 o 2 CO 3 -BiPO 4 Composite photocatalysts have not been reported yet

Method used

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  • Bi2O2CO3-BiPO4 composite photocatalyst and preparation method thereof
  • Bi2O2CO3-BiPO4 composite photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] (1) Under stirring conditions, mix 4.851g bismuth nitrate pentahydrate, 1.802g urea, 0.312g sodium dihydrogen phosphate dihydrate and 200mL deionized uniformly, adjust the pH of the mixed solution to 4 with ammonia, and then put the mixed solution in Continue to stir for 2 hours at room temperature;

[0014] (2) Transfer the mixed solution obtained in step (1) to a hydrothermal reaction kettle, and then put the hydrothermal reaction kettle into a microwave digestion apparatus for microwave reaction at 180°C for 30 minutes;

[0015] (3) After the reaction is completed, Bi with high catalytic activity is obtained after cooling, centrifugation, washing and drying 2 O 2 CO 3 -BiPO 4 Composite photocatalyst.

Embodiment 2

[0017] (1) Under stirring conditions, mix 4.851g bismuth nitrate pentahydrate, 1.802g urea, 0.156g sodium dihydrogen phosphate dihydrate and 200mL deionized uniformly, adjust the pH of the mixed solution to 4 with ammonia, and then put the mixed solution in Continue to stir for 2 hours at room temperature;

[0018] (2) Transfer the mixed solution obtained in step (1) to a hydrothermal reaction vessel, and then put the hydrothermal reaction vessel into a microwave digestion apparatus for microwave reaction at 180°C for 20 minutes;

[0019] (3) After the reaction is completed, Bi with high catalytic activity is obtained after cooling, centrifugation, washing and drying 2 O 2 CO 3 -BiPO 4 Composite photocatalyst.

[0020] figure 1 Is the XRD pattern of the prepared sample. It can be seen from the figure that the prepared sample has good crystallinity and high purity. figure 2 Bi 2 O 2 CO 3 -BiPO 4 Composite photocatalyst and pure Bi 2 O 2 CO 3 The comparison of photocatalyst catalyti...

Embodiment 3

[0022] (1) Under stirring conditions, 9.702g bismuth nitrate pentahydrate, 3.604g urea, 0.156g sodium dihydrogen phosphate dihydrate and 200mL deionized are mixed uniformly. Adjust the pH of the mixed solution to 4 with ammonia, and then put the mixed solution in Continue to stir for 2 hours at room temperature;

[0023] (2) Transfer the mixed solution obtained in step (1) to a hydrothermal reactor, and then put the hydrothermal reactor in a microwave digestion apparatus for microwave reaction at 200°C for 10 minutes;

[0024] (3) After the reaction is completed, Bi with high catalytic activity is obtained after cooling, centrifugation, washing and drying 2 O 2 CO 3 -BiPO 4 Composite photocatalyst.

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Abstract

The invention discloses a Bi2O2CO3-BiPO4 composite photocatalyst and a preparation method thereof. The invention relates to the technical field of inorganic environment-friendly photocatalytic materials. A technical scheme of the invention comprises the following steps: (1) sodium dihydrogen phosphate dihydrate, bismuth nitrate pentahydrate, urea and deionized water are well mixed under stirring; the pH value of the mixed solution is regulated to 4 with ammonia water; the mixed solution is stirring for 2h under room temperature; (2) the mixed solution is transferred to a hydrothermal reactor; the hydrothermal reactor is placed in a microwave digestion instrument; and a microwave reaction is carried out for 10-30min under a temperature of 180-200 DEG C; (3) when the reaction is finished, cooling, centrifugation, washing and drying are carried out, such that the Bi2O2CO3-BiPO4 composite photocatalyst with high catalytic activity is obtained. With the composite Bi2O2CO3-BiPO4 photocatalyst provided by the invention, photo-generated charge separation efficiency can be effectively improved, and the photocatalytic performance can be improved.

Description

Technical field [0001] The invention belongs to the technical field of inorganic environmental protection photocatalytic materials, and specifically relates to a Bi 2 O 2 CO 3 -BiPO 4 Composite photocatalyst and preparation method thereof. Background technique [0002] With the increasing depletion of fossil fuels such as coal and oil, mankind is facing a huge energy crisis, and the consumption of these fossil fuels also brings serious environmental pollution problems. Among the many technologies used in the treatment of environmental pollution problems, photocatalytic degradation of pollutants is an energy-saving, high-efficiency green environmental protection technology developed in recent years because of its low energy consumption, mild reaction conditions, less secondary pollution and Simple equipment and other advantages have become the future star of environmental governance technology. [0003] Among many photocatalytic materials, bismuth-based oxides have the characterist...

Claims

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Application Information

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IPC IPC(8): B01J27/236
Inventor 吕华刘玉民光景王键吉
Owner HENAN NORMAL UNIV
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