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Preparation method of titanium barium ferrum series photocatalyst

A photocatalyst and iron-based technology, which is applied in the field of preparation of titanium-barium-iron-based photocatalysts, can solve the problem of low synthesis temperature, achieve good stability, controllable particle size, and good photocatalytic performance of the product

Inactive Publication Date: 2008-07-09
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Hydrothermal synthesis has the advantages of uniform product composition, controllable particle size, and low synthesis temperature compared with solid-state reaction. At present, Bi is prepared by hydrothermal method. 5 FeTi 3 o 15 method has not yet been reported

Method used

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  • Preparation method of titanium barium ferrum series photocatalyst
  • Preparation method of titanium barium ferrum series photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Using Bi(NO 3 ) 3 ·5H 2 O, Fe(NO 3 ) 3 9H 2 O, tetrabutyl titanate is synthesized as raw material, according to the stoichiometric ratio, weigh 2.425g Bi(NO 3 ) 3 ·5H 2 O, 0.404g Fe(NO 3 ) 3 9H 2 O, 1.02g tetrabutyl titanate was dissolved in 4mol / L nitric acid. Completely dissolve, titrate with 2mol / L NaOH until a yellow precipitate is obtained, add water to 40mL, and transfer to a 50mL hydrothermal kettle. Heating at 180°C for 60 hours. After the reaction, the obtained yellow precipitate was filtered, washed three times with deionized water and absolute ethanol, and then dried at 50°C. As shown in Figure 1, the orthogonal phase Bi of about 40nm was obtained by XRD component analysis and Debye Scherer formula calculation. 5 FeTi 3 o 15 Nanosheets. Figure 2 is the UV / Vis diffuse reflectance spectrum of the product. It can be seen from the figure that the photocatalyst has photoresponse from the ultraviolet region to the visible region, and the estimated b...

Embodiment 2

[0027] Bi 5 FeTi 3 o 15 Use BiCl 3 , FeCl 3 , TiCl 4 Synthesize as raw material, weigh 1.575g BiCl according to the stoichiometric ratio 3 , 0.162g FeCl 3 , 0.569g TiCl 4 Dissolve in 4mol / L hydrochloric acid, titrate with 2mol / L NaOH until a yellow precipitate is obtained, add water to 40mL, and transfer to a 50mL hydrothermal kettle. Heating at 180°C for 60 hours. After the reaction, the obtained yellow precipitate was filtered, washed three times with deionized water and absolute ethanol, and then dried at 50°C. The product was determined to be orthorhombic phase Bi by XRD component analysis 5 FeTi 3 o 15 , the visible light degradation RB experiment result of wavelength > 400nm is slightly lower than that of Example 1, and the degradation rate is 75%.

Embodiment 3

[0029] Bi 5 FeTi 3 o 15 Using Bi(NO 3 ) 3 ·5H 2 O, Fe(NO 3 ) 3 9H 2 O, isopropyl titanate is synthesized as a raw material, according to the stoichiometric ratio, weigh 2.425g Bi(NO 3 ) 3 ·5H 2 O, 0.404g Fe(NO 3 ) 3 9H 2 O, 0.852g of isopropyl titanate was dissolved in 5mL of glacial acetic acid. Titrate with 1mol / L KOH until a yellow precipitate is obtained, add water to 40mL, and transfer to a 50mL hydrothermal kettle. Heating at 180°C for 60 hours. After the reaction, the obtained yellow precipitate was filtered, washed three times with deionized water and absolute ethanol, and then dried at 50°C. The product was determined to be orthorhombic phase Bi by XRD component analysis 5 FeTi 3 o 15 , the visible light degradation RB experiment result of wavelength>400nm is lower than embodiment 1, and the degradation rate is 67%.

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Abstract

The invention relates to a barium titanium iron series phhotocatalyst and a preparation method thereof, and belongs to the field of phhotocatalyst. In accordance with the chemical formula Bi5FeTi3O15, the invention adds titanium salt or titanate, malysite, bismuth salt into deionized water or acidic solution to dissolve and mix evenly, adds in aqueous alkali to produce settlings, and then adds the settlings into a water heat retort; after water heat reaction, the Bi5FeTi3O15 catalyst material is obtained after centrifugation, washing and drying. The invention reduces energy consumption of synthesization, and the product has even components, controllable grain size, quite high specific surface area, and good photocatalytic performance.

Description

technical field [0001] The invention relates to a preparation method of a titanium-barium-iron-based photocatalyst, belonging to the field of photocatalysts. Background technique [0002] Photocatalysis refers to the process of using photocatalysts to absorb light to decompose organic matter or decompose water. The mechanism is that the semiconductor photocatalyst is excited by light to generate non-equilibrium carriers, that is, photogenerated electrons and holes. After the electrons and holes migrate to the semiconductor surface, due to their strong redox ability, they can be contacted with organic matter or water. Redox reactions occur, breaking down organic matter into small molecules or breaking down water into hydrogen and oxygen. Because photocatalysis can work with light for a long time, it has broad application prospects in the field of environmental pollution control and hydrogen energy. [0003] At present, the research on photocatalysts mainly focuses on TiO 2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/843
Inventor 王文中孙松美
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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