Visible-light responsive magnetic photocatalytic material and preparation method thereof

A photocatalytic material, visible light technology, applied in the field of photocatalytic materials

Inactive Publication Date: 2014-06-25
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Combining bismuth oxide with nickel ferrite to form a heterojunction for photo

Method used

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  • Visible-light responsive magnetic photocatalytic material and preparation method thereof
  • Visible-light responsive magnetic photocatalytic material and preparation method thereof
  • Visible-light responsive magnetic photocatalytic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Preparation of nickel ferrite: fully dissolve nickel nitrate and ferric nitrate in deionized water, wherein the ratio of nickel nitrate and ferric nitrate is 1:4, adjust the pH with 6mol / L sodium hydroxide solution to 14 to obtain mixed solution A. Then transfer the mixed solution A to the reaction kettle, the preferred reaction kettle is a stainless steel reaction kettle with polytetrafluoroethylene liner, the set reaction temperature is 180°C, 200°C, 220°C, 240°C, and the reaction time is 24 h. After the reaction, cool down to room temperature, the cooling method is natural cooling, or other common physical cooling methods, wash with deionized water and ethanol, and dry by vacuum drying or natural drying to obtain nickel ferrite powder. The morphology of the SEM image was investigated, and when the reaction temperature was 220°C, the morphology of the nickel ferrite was the most regular, which was a nano-sized cube.

[0025] (2) Compounding of nickel ferrite and ...

Embodiment 2

[0027] (1) Preparation of nickel ferrite: fully dissolve nickel nitrate and ferric nitrate in deionized water, wherein the amount of nickel nitrate and ferric nitrate is 1:4, and adjust the pH with 6mol / L sodium hydroxide solution to 14. Obtain mixed solution A. Then transfer the mixed solution A to the reaction kettle, the preferred reaction kettle is a stainless steel reaction kettle with a polytetrafluoroethylene liner, the set reaction temperature is 220°C, the reaction time is 12 h, 24 h, 36 h, after the reaction is completed , cooled to room temperature, the cooling method is natural cooling, or other common physical cooling methods, washed with deionized water and ethanol, and dried by vacuum drying or natural drying to obtain nickel ferrite powder, which is inspected by taking SEM pictures Among them, when the reaction temperature is 24 h, the morphology of nickel ferrite is the most regular, which is a nano-sized cube.

[0028] (2) Compounding of nickel ferrite and b...

Embodiment 3

[0030] (1) Preparation of nickel ferrite: fully dissolve nickel nitrate and ferric nitrate in deionized water, wherein the amount of nickel nitrate and ferric nitrate is 1:4, and adjust the pH with 6mol / L sodium hydroxide solution to 14. Obtain mixed solution A. Then transfer the mixed solution A to the reactor, the preferred reactor is a stainless steel reactor with a polytetrafluoroethylene liner, the reaction temperature is 220°C, and the reaction time is 24 h. After the reaction is completed, cool to room temperature, and the cooling method is natural Cooling, or other common physical cooling methods, washing with deionized water and ethanol, and drying by vacuum drying or natural drying, the nickel ferrite powder is obtained.

[0031] (2) Compounding of nickel ferrite and bismuth oxide: Dissolve 0.970g of bismuth nitrate, 0.426g of sodium sulfate and 0.936g of nickel ferrite in 40 ml of deionized water. For solution B, dissolve 0.720g of sodium hydroxide in 40mL of deion...

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Abstract

The invention belongs to the technical field of preparation of photocatalytic materials and particularly relates to a visible-light responsive magnetic photocatalytic material and a preparation method thereof. The visible-light responsive magnetic photocatalytic material provided by the invention is formed by forming a heterojunction through loading nickel ferrite on the surface of bismuth oxide; the molecular formula is NiFe2O4/Bi2O3 and the structural form is that nickel ferrite grains are compounded on the surface of the rod-shaped bismuth oxide. The visible-light responsive magnetic photocatalytic material provided by the invention has the good photocatalytic efficiency under the illumination of visible light; in the process of degrading tetracycline, the degradation efficiency is up to 90.78% when an optimal preparation condition is utilized; meanwhile, the separation of a catalyst and a reaction system is convenient to realize under an applied magnetic field, so that the visible-light responsive magnetic photocatalytic material has a good industrial application prospect.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials, and in particular relates to a magnetic photocatalytic material responsive to visible light and a preparation method thereof. Background technique [0002] Antibiotics are a class of chemicals that are widely used to prevent and control viral diseases in humans and animals, and to promote the growth of animals and plants. Antibiotics cannot be completely absorbed during use, and a large amount of residual parts enter the environment, resulting in an increase in the background of antibiotics and the emergence of drug resistance. In recent years, antibiotics have been continuously detected in the water environment, which has caused potential harm to the ecological environment and human health. Therefore, how to eliminate antibiotic pollution in the water environment has become an urgent problem to be solved. Degradation of antibiotics can be achieved by electrochemical methods, bi...

Claims

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Application Information

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IPC IPC(8): B01J23/843B01J35/00
Inventor 施伟东任傲刘春波洪远志
Owner JIANGSU UNIV
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