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Bismuth fluorochlorotantalate and its preparation method and application

A technology of bismuth fluorochlorotantalate and bismuth chlorotantalate, which is applied in the field of inorganic photocatalyst materials, can solve the problems of low solar energy utilization rate, restricting industrial applications, and being easily corroded by light, achieving good optical activity, low production cost, good stability effect

Active Publication Date: 2020-04-10
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Photocatalysis has developed into an emerging chemical frontier subject. Many studies have proved that many semiconductor materials have photocatalytic activity. TiO 2 Is the most classic photocatalyst, but except TiO 2 Other semiconductors are difficult to be practically applied due to low activity or easy to be corroded by light.
As for TiO 2 There are also key technical problems that restrict the industrial application of this technology
For example, the quantum efficiency is low (less than 4%), and it is difficult to deal with pollution with large quantities and high concentrations; secondly, TiO 2 The utilization rate of solar energy is low, and it can only absorb and utilize ultraviolet light with a wavelength of less than 360nm in sunlight

Method used

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  • Bismuth fluorochlorotantalate and its preparation method and application
  • Bismuth fluorochlorotantalate and its preparation method and application
  • Bismuth fluorochlorotantalate and its preparation method and application

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Effect test

Embodiment 1

[0042] This embodiment provides a BiTa 2 o 6 (F, Cl) the preparation method of photocatalyst, concrete steps are as follows:

[0043] According to the chemical formula BiTa 2 o 6 The molar ratio of Bi and Ta in (F,Cl) was weighed separately from bismuth nitrate Bi(NO 3 ) 3 ·5H 2 O: 3.64 g, tantalum chloride TaCl 5 : 5.37 grams, weighed ammonium fluoride NH 4 F: 0.56 g.

[0044] First put Bi(NO 3 ) 3 ·5H 2 O and ammonium fluoride NH 4 Dissolve F in ethylene glycol respectively, mix and stir, then adjust the pH to 6, stir thoroughly at room temperature for 5 hours, and let the solution stand still to fully precipitate the product. Then the precipitate was filtered and washed with distilled water, dried and calcined at 400°C for 5 hours to obtain BiOF.

[0045] Then the calcined product and tantalum chloride TaCl 5 Grind and mix uniformly, press the obtained mixture into a block, and calcinate in air atmosphere, the calcining temperature is 1100°C, the calcining tim...

Embodiment 2

[0051] This embodiment provides a BiTa 2 o 6 (F, Cl) the preparation method of photocatalyst, concrete steps are as follows:

[0052] According to the chemical formula BiTa 2 o 6 The molar ratio of Bi and Ta in (F,Cl) was weighed separately from bismuth nitrate Bi(NO 3 ) 3 ·5H 2 O: 3.88 g, tantalum chloride TaCl 5 : 5.73 grams, weighed ammonium fluoride NH 4 F: 0.89 g.

[0053] First put Bi(NO 3 ) 3 ·5H 2 O and ammonium fluoride NH 4 Dissolve F in ethylene glycol respectively, mix and stir, adjust the pH to 7, stir thoroughly at room temperature for 3 hours, let the solution stand still, and fully precipitate the product. The precipitate was filtered, washed with distilled water, and calcined at 400°C for 3 hours after drying.

[0054] Then the calcined product and tantalum chloride TaCl 5 Grind and mix uniformly, press the obtained mixture into a block and calcinate in the air atmosphere, the calcining temperature is 950°C, the calcining time is 10 hours, cool n...

Embodiment 3

[0057] This embodiment provides a BiTa 2 o 6 (F, Cl) the preparation method of photocatalyst, concrete steps are as follows:

[0058] According to the chemical formula BiTa 2 o 6 The molar ratio of Bi and Ta in (F,Cl) was weighed separately from bismuth nitrate Bi(NO 3 ) 3 ·5H 2 O: 2.72 grams, tantalum chloride TaCl 5 : 3.98 grams, weighed ammonium fluoride NH 4 F: 0.52 g.

[0059] First put Bi(NO 3 ) 3 ·5H 2 O and ammonium fluoride NH 4 Dissolve F in ethylene glycol respectively, mix and stir, adjust the pH to 6.5, stir fully at room temperature for 4 hours, let the solution stand still, and fully precipitate the product. The precipitate was filtered and washed with distilled water, dried and calcined at 400°C for 4 hours.

[0060] Then the calcined product and tantalum chloride TaCl 5 Grind and mix uniformly, press the obtained mixture into a block and calcinate in air atmosphere, the calcining temperature is 1050°C, the calcining time is 8 hours, cool naturall...

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Abstract

A method for preparing bismuth chlorofluorotantalate, comprising: dissolving, in alcohol, bismuth nitrate and ammonium fluoride, then adjusting the pH to 6-7, reacting at 20-30°C, and calcining precipitates obtained after the reaction at 400-450°C, so as to obtain BiOF; and uniformly mixing TaCl5 and the calcined product BiOF, then calcining at 950-1100°C, and cooling same to obtain bismuth chlorofluorotantalate, the chemical formula thereof being BiTa2O6(F,Cl); the molar ratio of the calcined product BiOF and the tantalum chloride is 1:2. The bismuth chlorofluorotantalate prepared has a formula of BiTa2O6(F,Cl), and can be used as a photocatalyst. The bismuth chlorofluorotantalate is simple in preparation method, low in production cost, good in product stability and high in photocatalysis efficiency as the photocatalyst.

Description

technical field [0001] The invention relates to the field of inorganic photocatalyst materials, in particular to bismuth fluorochlorotantalate and its preparation method and application. Background technique [0002] Since the 20th century, with the rapid development of industry and society, human beings are also facing the bitter fruit of blind and short-sighted living environment deteriorating, and the potential impact of environmental pollution has seriously threatened the continued reproduction and survival of human beings. Therefore, controlling pollution, effectively protecting the environment, and realizing the sustainable development of the global society have become one of the most urgent desires and common aspirations of mankind. [0003] How to remove dyes in water efficiently and without residue under the condition of ensuring green and environmental protection has become one of the key technologies developed by researchers. Among them, the use of photocatalytic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/12C02F1/32C02F101/30
CPCB01J27/12B01J35/004C02F1/32C02F2101/308
Inventor 黄彦林秦杰魏东磊
Owner SUZHOU UNIV
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