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Preparation method of porous nano-scale BiFeO3

A nano and template technology, applied in the field of photocatalytic materials, to achieve the effect of no template residue, no surface defects, and no collapse of pores

Active Publication Date: 2016-04-27
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, about the preparation of porous nano-BiFeO by using sublimable compounds as templates 3 The method of semiconductor photocatalyst has not been reported in the literature, and it is porous nano-BiFeO 3 The preparation opens up a new way, which has important practical significance

Method used

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  • Preparation method of porous nano-scale BiFeO3
  • Preparation method of porous nano-scale BiFeO3
  • Preparation method of porous nano-scale BiFeO3

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Porous nano-BiFeO 3 Preparation of:

[0023]

[0024]According to the above-mentioned mass percentage, ferric trichloride, ferric bromide, bismuth sulfate, nitric acid (65%) are mixed with half of the total amount of deionized water, stirred and dissolved to obtain ferric chloride, ferric bromide, bismuth sulfate and nitric acid Mix the solution, mix potassium hydroxide with the other half of the total amount of deionized water, stir and dissolve to obtain a potassium hydroxide solution, add the mixed solution of ferric chloride, ferric bromide, bismuth sulfate and nitric acid dropwise to potassium hydroxide In the solution, continue to stir and react for 3 hours after the dropwise addition, and the product is subjected to centrifugation and washing operations and repeated three times, and then centrifuged to obtain BiFeO 3 Sol; by BiFeO 3 After mixing the sol and deionized water at a mass ratio of 1:5, disperse for 2 hours with an ultrasonic wave with a frequency ...

Embodiment 2

[0026] Porous nano-BiFeO 3 Preparation of:

[0027]

[0028] According to the above mass percentage, ferric nitrate, ferric formate, bismuth nitrate and hydrochloric acid (37%) are mixed with half of the total amount of deionized water, stirred and dissolved to obtain a mixed solution of ferric nitrate, ferric formate, bismuth nitrate and hydrochloric acid, and the hydrogen oxidized Mix sodium with the other half of the total amount of deionized water, stir and dissolve to obtain a sodium hydroxide solution, add the mixed solution of ferric nitrate, ferric formate, bismuth nitrate and hydrochloric acid into the sodium hydroxide solution dropwise under stirring, and continue stirring after the dropwise addition After reacting for 2.5h, the product was centrifuged and washed three times, and then centrifuged to obtain BiFeO 3 Sol; by BiFeO 3 After mixing the sol and deionized water at a mass ratio of 1:6, disperse for 2 hours with an ultrasonic wave with a frequency of 68KH...

Embodiment 3

[0030] Porous nano-BiFeO 3 Preparation of:

[0031]

[0032]

[0033] According to the above mass percentage, ferric sulfate, ferric citrate, bismuth chloride, bismuth acetate, sulfuric acid (98%) and hydrochloric acid (37%) are mixed with half of the total amount of deionized water, stirred and dissolved to obtain ferric sulfate, ferric citrate , bismuth chloride, bismuth acetate, sulfuric acid and hydrochloric acid, lithium hydroxide and barium hydroxide are mixed with the other half of the total amount of deionized water, stirred and dissolved to obtain a mixed solution of lithium hydroxide and barium hydroxide, and stirred Add the mixed solution of ferric sulfate, ferric citrate, bismuth chloride, bismuth acetate, sulfuric acid and hydrochloric acid dropwise into the mixed solution of lithium hydroxide and barium hydroxide, continue to stir and react for 1.5h after the dropwise addition, and the product is centrifuged and washed. and repeated three times, and then c...

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Abstract

The invention discloses a preparation method of porous nano-scale BiFeO3. According to the method, an iron salt, a bismuth salt and an acid are mixed with deionized water; the mixture is stirred until the materials are dissolved, such that a mixed solution of the iron salt, the bismuth salt and the acid is obtained; an alkali is mixed with deionized water and is dissolved by stirring, such that an alkali solution is obtained; under stirring, the mixed solution of the iron salt, the bismuth salt and the acid is added dropwise into the alkali solution, such that a reaction is carried out; a reaction product is subjected to washing and centrifugal separation, such that BiFeO3 sol is obtained; the BiFeO3 sol is mixed with deionized water; ultrasonic dispersion is carried out; an organic solvent and a sublimable compound as a template are added; a solvothermal reaction is carried out in a water-organic solvent mixed solvent; the product is subjected to distillation, such that the mixed solvent is removed; and roasting, cooling, grinding, washing, filtering, drying and grinding processes are carried out, such that porous nano-scale BiFeO3 powder is obtained. The method has the advantages of simple and feasible process, and low investment. The method is suitable for popularization and application.

Description

technical field [0001] The invention relates to a porous nano-BiFeO 3 The preparation method belongs to the field of photocatalytic materials. Background technique [0002] With the acceleration of the industrialization process, the energy crisis and environmental crisis are becoming more and more serious, and the development of renewable new energy has attracted much attention. As a clean energy, solar energy is an inexhaustible, inexhaustible, pollution-free, cheap energy that can be used freely and peacefully by all countries in the world. It is also a variety of renewable energy such as biomass energy, wind energy, ocean energy, water Can wait for other sources of energy. Governments of all countries attach great importance to the development of renewable energy, and renewable energy is a hot research field that countries invest heavily in. [0003] Photocatalyst is a kind of semiconductor material necessary for the development and utilization of solar energy. At pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/843B01J35/10C01G49/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G49/009B01J23/8437C01P2004/64B01J35/39
Inventor 刘福生曹佳伟王小庆陈佳鑫
Owner NANJING FORESTRY UNIV
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