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Method for synthesizing bismuth vanadate photocatalyst through starch self-combustion

A self-propagating combustion and photocatalyst technology, applied in chemical instruments and methods, separation methods, light water/sewage treatment, etc., to achieve the effects of improving photocatalytic activity, broadening the absorption range, and improving adsorption capacity

Inactive Publication Date: 2015-11-11
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention aims at the problems existing in the existing bismuth vanadate photocatalyst preparation method, to provide a kind of method that utilizes self-propagating combustion of starch to prepare reticular granular bismuth vanadate photocatalyst

Method used

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  • Method for synthesizing bismuth vanadate photocatalyst through starch self-combustion
  • Method for synthesizing bismuth vanadate photocatalyst through starch self-combustion
  • Method for synthesizing bismuth vanadate photocatalyst through starch self-combustion

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Embodiment 1

[0036] A kind of method utilizing self-propagating combustion of starch to prepare bismuth spherical vanadate in network shape granules comprises the following process steps:

[0037] (1) Add 0.01mol of BiNO 3 ·5H 2 O (4.8507g) dissolved in 5mL of 4mol / L dilute nitric acid, 0.01mol of NH 4 VO 3 (1.1698g) was dissolved in 30mL of deionized water, and stirred at room temperature at a speed of 150r / min for 15min to obtain a bismuth salt solution and a vanadium salt solution;

[0038] (2) Slowly pour the dissolved vanadium salt solution into the bismuth salt solution, adjust the pH to 0.7 with concentrated ammonia water, and stir the mixed solution at room temperature at a speed of 350r / min for 30min to obtain a mixed solution;

[0039] (3) Add 6g of soluble starch to the mixed solution, and keep stirring at a speed of 200r / min for 1 hour to obtain a paste solution;

[0040] (4) Put the obtained pasty mixed solution into a crucible, put it into a muffle furnace, raise the temp...

Embodiment 2

[0047] A kind of method utilizing self-propagating combustion of starch to prepare bismuth spherical vanadate in network shape granules comprises the following process steps:

[0048] (1) Add 0.01mol of BiNO 3 ·5H 2 O (4.8507g) dissolved in 5mL of 4mol / L dilute nitric acid, 0.01mol of NH 4 VO 3 (1.1698g) was dissolved in 40mL of deionized water, and stirred at room temperature at a speed of 350r / min for 15min to obtain a bismuth salt solution and a vanadium salt solution;

[0049] (2) Slowly pour the above-dissolved vanadium salt solution into the bismuth salt solution, adjust the pH to 0.75 with concentrated ammonia water, and stir the mixed solution at room temperature at a speed of 150r / min for 30min to obtain a mixed solution;

[0050] (3) Add 6g of soluble starch to the mixed solution, and keep stirring at a speed of 200r / min for 1 hour to obtain a paste solution;

[0051] (4) Put the obtained pasty mixed solution into a crucible, put it into a muffle furnace, raise t...

Embodiment 3

[0055] A kind of method utilizing self-propagating combustion of starch to prepare bismuth spherical vanadate in network shape granules comprises the following process steps:

[0056] (1) Add 0.01mol of BiNO 3 ·5H 2 O (4.8507g) dissolved in 5mL of 4mol / L dilute nitric acid, 0.01mol of NH 4 VO 3 (1.1698g) was dissolved in 30mL of deionized water, and stirred at room temperature at a speed of 200r / min for 15min to obtain a bismuth salt solution and a vanadium salt solution;

[0057] (2) Slowly pour the dissolved vanadium salt solution into the bismuth salt solution, adjust the pH to 0.7 with concentrated ammonia water, and stir the mixed solution at room temperature at a speed of 300r / min for 30min to obtain a mixed solution;

[0058] (3) Add 6g of soluble starch to the mixed solution, and keep stirring at a speed of 200r / min for 1h to obtain a paste solution;

[0059] (4) Put the obtained pasty mixed solution into a crucible, put it into a muffle furnace, raise the temperat...

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Abstract

The invention provides a method for synthesizing a bismuth vanadate photocatalyst through starch self-combustion. According to the method, BiNO3-5H2O and NH4VO3 with the molar ratio being 1:1 are dissolved in diluted nitric acid and deionized water respectively, after the BiNO3-5H2O and the NH4VO3 are completely dissolved and evenly stirred, the two solutions are mixed and stirred, the pH value of the mixed solution is adjusted to be 0.65-0.75 through aqueous ammonia, starch is added into the mixed solution to serve as an accelerant, stirring continues for 40-80 min, and a pasty solution is obtained; the pasty solution is taken out and placed in a muffle furnace to be heated to 600-660 DEG C, heat is preserved for 6-7 hours, and fluffy powder BiVO4 can be obtained. The starch is used as the accelerant, the bismuth vanadate photocatalyst is synthesized through the self-combustion method, the appearance of the bismuth vanadate photocatalyst is in a net-shaped particle ball shape, the diameter of a particle ball ranges from 8 microns to 15 microns, the bismuth vanadate photocatalyst has large specific surface area and high adsorption capacity, photocatalytic activity is improved, and the photocatalyst has an obvious visual light absorbing effect. Besides, the synthesizing process is simple, cost is low, environment friendliness is achieved, and the method is suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of inorganic photocatalytic materials, in particular to a method for synthesizing a bismuth vanadate photocatalyst by using starch self-propagating combustion. Background technique [0002] With the development of economy and industry, environmental pollution is becoming more and more serious. Many new technologies have been tried to be applied to environmental governance, but the use of photocatalytic technology to control environmental pollution is currently one of the most active research directions. Among them, visible light semiconductor photocatalysis can completely catalyze and degrade various organic and inorganic substances in polluted air and wastewater. The advantages of visible light semiconductor photocatalysts, such as mild reaction conditions, simple operation, and environmental friendliness, have attracted much attention. In recent years, people have successively developed a series of new vis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/22C02F1/30B01D53/86
Inventor 胡朝浩朱斌青钟燕周怀营
Owner GUILIN UNIV OF ELECTRONIC TECH
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