Preparation method of porous nano CoFe2O4

A cofe2o4, nanotechnology, applied in the field of photocatalytic materials, to achieve the effects of no surface defects, improved photocatalytic efficiency, and no template residue

Inactive Publication Date: 2015-05-06
NANJING UNIV OF TECH
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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-CoFe with sublimable compounds as templates 2 o 4 The method of semiconductor photocatalyst has not been reported in the literature, for porous nano-CoFe 2 o 4 The preparation opens up a new way, which has important practical significance

Method used

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  • Preparation method of porous nano CoFe2O4
  • Preparation method of porous nano CoFe2O4
  • Preparation method of porous nano CoFe2O4

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Porous nano-CoFe 2 o 4 Preparation of:

[0021]

[0022] According to the above mass percentage, ferric trichloride, ferric bromide, cobalt sulfate, cobalt bromide and half of the total amount of deionized water are mixed, stirred and dissolved to obtain ferric chloride, ferric bromide, cobalt sulfate and cobalt bromide 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, cobalt sulfate and cobalt bromide dropwise to hydrogen In the potassium oxide solution, continue to stir for 2 hours after the dropwise addition, and the product is subjected to centrifugation and washing operations and repeated three times, and then centrifuged to obtain CoFe 2 o 4 Sol; by CoFe 2 o 4 After mixing the sol and deionized water at a mass ratio of 1:3, disperse for 1 hour with an ultrasonic wave with a frequency of 2...

Embodiment 2

[0024] Porous nano-CoFe 2 o 4 Preparation of:

[0025]

[0026] According to the above mass percentage, mix ferric nitrate, ferric formate, cobalt citrate and cobalt nitrate with half of the total amount of deionized water, stir and dissolve to obtain a mixed solution of ferric nitrate, ferric formate, cobalt citrate and cobalt nitrate. Sodium is mixed with the other half of the total amount of deionized water, stirred and dissolved to obtain a sodium hydroxide solution, and the mixed solution of ferric nitrate, ferric formate, cobalt citrate and cobalt nitrate is added dropwise to the sodium hydroxide solution under stirring. Continue to stir the reaction for 3h, the product is centrifuged and washed and repeated three times, and then centrifuged to obtain CoFe 2 o 4 Sol; by CoFe 2 o 4 After mixing the sol and deionized water at a mass ratio of 1:4, disperse for 2 hours with an ultrasonic wave with a frequency of 68KHz and a power of 3KW, add ethanol, toluene, p-benzo...

Embodiment 3

[0028] Porous nano-CoFe 2 o 4 Preparation of:

[0029]

[0030]

[0031] According to the above mass percentage, iron sulfate, iron citrate, cobalt chloride and cobalt acetate are mixed with half of the total amount of deionized water, stirred and dissolved to obtain a mixed solution of iron sulfate, iron citrate, cobalt chloride and cobalt acetate, and 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 the mixed solution of iron sulfate, iron citrate, cobalt chloride and cobalt acetate Add dropwise into the mixed solution of lithium hydroxide and barium hydroxide, continue to stir and react for 4 hours after the dropwise addition, the product is subjected to centrifugation and washing operations and repeated three times, and then centrifuged to obtain CoFe 2 o 4 Sol; by CoFe 2 o 4 After mixing the sol and deionize...

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Abstract

The invention discloses a preparation method of porous nano CoFe2O4. The method comprises the following steps: under the condition that the mass percentage of a ferric salt, a cobalt salt, alkali, deionized water, an organic solvent and a sublimable compound template is (0.001-70%):(0.00001-70%): (0.001-55%): (0.001-90%):(0.001-90%):(0.001-90%), reacting a mixed solution of the ferric salt and the cobalt salt with an alkali solution, and carrying out separation and purification on the obtained object so as to obtain a CoFe2O4 sol; and mixing the CoFe2O4 sol with the deionized water, carrying out ultrasonic dispersion on the obtained mixture, adding the organic solvent and the sublimable compound template, reacting by using a water-organic solvent mixed solvothermal method, distilling the obtained object so as to remove a mixed solvent, carrying out heat treatment on the obtained product so as to remove the sublimable compound template, and then sequentially cooling, grinding, washing, filtering, drying and grinding the obtained product, so that porous nano CoFe2O4 powder is obtained. The method is simple and feasible in process, small in investment, and beneficial for popularization and utilization.

Description

technical field [0001] The invention relates to a porous nano-CoFe 2 o 4 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...

Claims

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Application Information

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IPC IPC(8): C01G51/04B01J23/75
Inventor 王晟杜湘云王田珍柯旭胡海龙黄集森
Owner NANJING UNIV OF TECH
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