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A kind of preparation method of perovskite type photocatalyst and its products

A photocatalyst, perovskite-type technology, applied in the field of preparation method of perovskite photocatalyst and its products, can solve problems such as low degradation rate, and achieve the effects of convenient operation, simple process and strong operability

Inactive Publication Date: 2015-08-05
ZHEJIANG SHUREN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In perovskite ABO 3 In the research on photocatalysts published in "Modern Chemical Industry" in 2010, "Preparation of Perovskite Oxide and Evaluation of Catalytic Activity" disclosed that Zou Wenjing, Han Hui and other researchers synthesized LaNiO3 and studied its effect on methyl orange. The degradation effect found that the degradation rate of LaNiO3 to methyl orange is about 70%, and the degradation rate is relatively low

Method used

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  • A kind of preparation method of perovskite type photocatalyst and its products
  • A kind of preparation method of perovskite type photocatalyst and its products
  • A kind of preparation method of perovskite type photocatalyst and its products

Examples

Experimental program
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Effect test

Embodiment 1

[0044] SrFe 0.5 co 0.5 o 3-δ Preparation of photocatalyst

[0045] Weigh 1.0mol Sr(NO 3 ) 2 , 0.03mol Co(NO 3 ) 2 ·6H 2 O, 0.03mol Fe(NO 3 ) 3 9H 2 O, 0.10mol citric acid, put into a beaker, add 300ml of distilled water, stir until dissolved, cover the opening of the beaker with a watch glass, seal it, then place the beaker on a constant temperature magnetic stirrer for heating and stirring, and heat to 92°C , stirred at constant temperature for 3.5 hours, opened the opening of the beaker, and continued to heat until the water evaporated to form a colloid, and placed the colloid in a blast drying oven for 18 hours to keep warm and dry at a temperature of 110°C;

[0046] The dried sample was taken out, ground into fine powder, put into an alumina crucible, and calcined. During calcination, the heating rate is 5°C / min, the temperature is raised to 185°C, and the temperature is kept for 1.2 hours; the temperature is continued to be raised to 400°C, and the temperature ...

Embodiment 2

[0055] Ba 0.2 Sr 0.8 Fe 0.5 co 0.5 o 3-δ Preparation of photocatalyst:

[0056] Weigh 0.02mol Ba(NO 3 ) 2 , 0.08mol Sr(NO 3 ) 2 , 0.05mol Co(NO 3 ) 2 ·6H 2 O, 0.05mol Fe(NO 3 ) 3 9H 2O, 0.15mol citric acid, put into a beaker, add 350ml of distilled water, stir until dissolved, cover the opening of the beaker with a watch glass, seal it, then place the beaker on a constant temperature magnetic stirrer for heating and stirring, and heat to 90°C , Stir at constant temperature for 3 hours, open the opening of the beaker, continue to heat until the water evaporates to form a colloid, place the colloid in a blast drying oven for 20 hours and keep it dry for 20 hours at a temperature of 120°C;

[0057] (2) Ba 0.2 Sr 0.8 Fe 0.5 co 0.5 o 3-δ Calcination of photocatalyst: Take out the dried sample, grind it finely, put it into an alumina crucible, and carry out calcination. During calcination, the heating rate is 5°C / min, the temperature is raised to 200°C, and the ...

Embodiment 3

[0067] Ba 0.4 Sr 0.6 Fe 0.5 co 0.5 o 3-δ Preparation of photocatalyst:

[0068] Weigh 0.04mol Ba(NO 3 ) 2 , 0.06mol Sr(NO 3 ) 2 , 0.04mol Co(NO 3 ) 2 ·6H 2 O, 0.04mol Fe(NO 3 ) 3 9H 2 O, 0.13mol citric acid, put into the beaker, then add 400ml of distilled water, stir until dissolved, cover the opening of the beaker with a watch glass, seal it, then place the beaker on a constant temperature magnetic stirrer for heating and stirring, and heat to 94°C , stirred at constant temperature for 4 hours, opened the opening of the beaker, continued to heat until the water evaporated to form a colloid, placed the colloid in a blast drying oven for 21 hours and kept it dry for 21 hours at a temperature of 130°C;

[0069] (2) Ba 0.4 Sr 0.6 Fe 0.5 co 0.5 o 3-δ Calcination of photocatalyst: Take out the dried sample, grind it finely, put it into an alumina crucible, and carry out calcination. During calcination, the heating rate is 5°C / min, the temperature is raised to ...

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Abstract

The invention discloses a preparation method of a perovskite type photocatalyst. The method comprises the following steps of: (1) taking barium salt, strontium salt, cobalt salt, ferric salt and citric acid, adding distilled water to mix and dissolve, sealing and heating to be at 90-100 DEG C, stirring at a constant temperature for 3-4h, releasing the sealing and heating continuously until the water is evaporated to form colloid, drying the colloid for 18-22h, holding the temperature at 110-130 DEG C; and (2) taking out a dried sample for calcination and grinding the calcined sample to obtain the black powder-shaped BaxSSr1-xFe0.5Co0.5O3-delta photocatalyst. The invention also discloses a perovskite type photocatalyst product prepared according to the preparation method; the value range of the x in the prepared BaxSSr1-xFe0.5Co0.5O3-delta photocatalyst is 0-1. Perovskite type oxides prepared through using the preparation method have excellent photocatalytic degradation activity, the chroma removal rate after the reaction is high, the degradation rate for methyl orange with appointed concentration is above 95% and the introduction rate for appointed Congo red dyes is up to 93%.

Description

technical field [0001] The invention relates to a preparation method and a product of a photocatalyst for controlling environmental pollution, in particular to a preparation method of a perovskite photocatalyst and a product thereof. Background technique [0002] With the rapid development of the dye and textile industry, the variety and quantity of dyes are increasing day by day. Synthetic dye factories and printing and dyeing factories discharge a large amount of colored wastewater every year. At least 15% of dyes will be lost in the process of dyeing and textile rinsing. One of the main pollution sources of industrial wastewater. These wastewaters containing residual dyes affect water quality, and some azo dyes and their metabolites such as aromatic amines have serious toxicity and are potential carcinogens. Because wastewater containing organic dyes strongly resists microbial degradation and is inevitably transformed into toxic or carcinogenic substances, organic dye wa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/78A62D3/176A62D101/20
Inventor 黄向红乔军王剑辉任凯李超屠建樑刘芳芳赵挺
Owner ZHEJIANG SHUREN UNIV
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