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Process for producing high-efficiency photocatalysis material

A kind of photocatalytic material, composite photocatalytic technology

Inactive Publication Date: 2008-08-20
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, Ag / BiVO is commonly used 4 , Pd / BiVO 4 ,Co 3 o 4 / BiVO 4 , and other composite photocatalysts, but the experimental conditions required in the synthesis process are relatively high, and the application is limited

Method used

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  • Process for producing high-efficiency photocatalysis material
  • Process for producing high-efficiency photocatalysis material
  • Process for producing high-efficiency photocatalysis material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] With Bi(NO 3 ) 3 ·5H 2 O and NH 4 VO 3 Prepare Bi(NO 3 ) 3 and NH at a molar concentration of 0.50 mol / l 4 VO 3 solution. Take 20.00ml Bi(NO 3 ) 3 solution and 20.00ml of NH 4 VO 3 solution, add 5ml of N, N dimethylacetamide (DMA) as a surfactant, stir at room temperature for 3h, make it react fully, wash the obtained solid product repeatedly with pure water, and then place it in an oven to dry at 60°C 28 hours, get BiVO 4 . 2.425gBi(NO 3 ) 3 ·5H 2 O was calcined at 600°C for 4 hours to obtain the product Bi 2 o 3 . Mix the previously prepared BiVO according to different mass ratios 3:1, 1:1.1:3 4 and Bi 2 o 3 , the desired product is obtained. According to the ratio of 1.2 mg / ml, the obtained product was added to 100 milliliters of 10 mol / l Rhodamine B, and the whole system was irradiated with visible light. Experiments showed that the obtained mixture showed higher activity for the photocatalytic decolorization of Rhodamine B.

Embodiment 2

[0025] With Bi(NO 3 ) 3 ·5H 2 O and NH 4 VO 3 Bi(NO 3 ) 3 and NH at a molar concentration of 0.60 mol / l 4 VO 3 solution. Take 15.00ml of prepared Bi(NO 3 ) 3 solution and 15.00ml of NH 4 VO 3 solution, add 6ml of N,N dimethylacetamide (DMA) as a surfactant, stir at room temperature for 3.5h to make it fully react, wash the resulting solid product repeatedly with pure water, and then place it in an oven at 70°C Dry for 20 hours to get BiVO 4 . 2.425gBi(NO 3 ) 3 ·5H 2 O was calcined at 700°C for 4 hours to obtain the product Bi 2 o 3 . Mix the previously prepared BiVO according to different mass ratios 3:1, 1:1.1:3 4 and Bi 2 o 3 , the desired product is obtained. According to the ratio of 1.2 mg / ml, the obtained product was added to 100 milliliters of 10 mol / l Rhodamine B, and the whole system was irradiated with visible light. Experiments showed that the obtained mixture showed higher activity for the photocatalytic decolorization of Rhodamine B.

Embodiment 3

[0027] With Bi(NO 3 ) 3 ·5H 2 O and NH 4 VO 3 Bi(NO 3 ) 3 and NH at a molar concentration of 0.70 mol / l 4 VO 3 solution. Take 15.00ml of prepared Bi(NO 3 )3 solution and 15.00ml of NH 4 VO 3 solution, add 7ml of N, N dimethylacetamide (DMA) as a surfactant, stir at room temperature for 3h, make it fully react, wash the obtained solid product repeatedly with pure water, and then place it in an oven to dry at 60°C 24 hours, get BiVO 4 . 2.425gBi(NO 3 ) 3 ·5H 2 O was calcined at 600°C for 5 hours to obtain the product Bi 2 o 3 . Mix the previously prepared BiVO according to different mass ratios 3:1, 1:1.1:3 4 and Bi 2 o 3 , the desired product is obtained. According to the ratio of 1.2 mg / ml, the obtained product was added to 100 milliliters of 10 mol / l Rhodamine B, and the whole system was irradiated with visible light. Experiments showed that the obtained mixture showed higher activity for the photocatalytic decolorization of Rhodamine B.

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Abstract

The invention relates to a preparation method for high efficiency photocatalyst, belonging to technical field of catalytic materials. The chemical formula of the photocatalysis material: BiVO4Bi2O3. The preparation steps are as follows: taking Bi(NO3) 3 x 5H2O and NH4VO3 as materials; combining hydrothermal reaction and solid phase reaction to prepare the photocatalysis material with stable chemical properties and strong absorption under visible light. The photocatalysis material can decompose organic pollutant (such as rhodamine B) under the irradiation of the visible light with mild conditions, and can thoroughly degrading the organic pollutant (such as rhodamine B). The preparation method has the advantages of strong operability, good reproducibility, stable quality of the obtained products, good catalysis effect and applicability to environmental pollution control.

Description

technical field [0001] The invention belongs to the technical field of catalytic materials, and in particular relates to a preparation method of a high-efficiency photocatalyst. Background technique [0002] Due to the emergence of global environmental pollution and energy crisis, people are highly concerned about energy and environmental issues, and it is urgent to develop functional materials with high efficiency, low energy consumption, wide application range, and no pollution to the environment. In 1972, Fujishima and Honda et al were studying water in TiO 2 The photocatalytic phenomenon was discovered during the photodecomposition on the electrode, and since then extensive research on photocatalysis in environmental purification and light energy conversion has been carried out. [0003] Photocatalytic technology can be used to oxidize and decompose organic pollutants into inorganic substances. The reaction process is expressed as follows: [0004] organic pollutants +...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/22B01J23/18C02F1/30
Inventor 闫冰李灵芝
Owner TONGJI UNIV