Preparation method of bismuth-based strontium magnetic photo-catalyst, and bismuth-based strontium magnetic photo-catalyst

A photocatalyst and magnetic technology, which is applied in the field of preparation of bismuth-based strontium magnetic photocatalyst, can solve the problems of endangering the health of operators, low magnetization and coercivity, and easy volatility, and saves industrial production costs and magnetic properties. The effect of good degree and strong anti-demagnetization ability

Inactive Publication Date: 2013-12-18
CHONGQING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The main disadvantages of this method are: (1) the concentrated hydrochloric acid raw material is strongly acidic and volatile, so the technical process has potential safety hazards and may corrode experimental equipment, and the volatilized hydrochloric acid may cause environmental pollution and even endanger the health of operators; (2) ) The magnetic source material of the bismuth-doped magnetic photocatalyst is ferrof

Method used

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Embodiment 1

[0023] A preparation method of bismuth-based strontium magnetic photocatalyst, its specific steps are as follows:

[0024] (1) prepare bismuth nitrate homogeneous solution

[0025] Using bismuth nitrate as a raw material, using nitric acid solution as a solvent, according to the ratio of the mass (g) of bismuth nitrate: the volume (mL) of nitric acid solution with a molar concentration of 4mol / L being 1:5, add bismuth nitrate and nitric acid solution into a reaction vessel, and mechanically stirred until the bismuth nitrate was completely dissolved to prepare a transparent bismuth nitrate homogeneous solution.

[0026] (2) Preparation of strontium ferrite suspension

[0027] Using strontium ferrite as raw material, using sodium dodecylbenzenesulfonate as dispersant, according to the mass (g) ratio of sodium dodecylbenzenesulfonate, bismuth nitrate and strontium ferrite is 1:20:5 Ratio, strontium ferrite and sodium dodecylbenzenesulfonate were added into the reaction vessel, ...

Embodiment 2

[0031] A preparation method of bismuth-based strontium magnetic photocatalyst, its specific steps are as follows:

[0032] (1) prepare bismuth nitrate homogeneous solution

[0033] Using bismuth nitrate as a raw material, using nitric acid solution as a solvent, according to the ratio of the mass (g) of bismuth nitrate: the volume (mL) of the nitric acid solution with a molar concentration of 3mol / L being 1:4, add bismuth nitrate and nitric acid solution into a reaction vessel, and mechanically stirred until the bismuth nitrate was completely dissolved to prepare a transparent bismuth nitrate homogeneous solution.

[0034] (2) Preparation of strontium ferrite suspension

[0035] Using strontium ferrite as raw material, using sodium dodecylbenzenesulfonate as a dispersant, according to the mass (g) ratio of sodium dodecylbenzenesulfonate, bismuth nitrate and strontium ferrite is 1:20:4 Ratio, adding strontium ferrite and sodium dodecylbenzenesulfonate into the reaction vessel...

Embodiment 3

[0039] A preparation method of bismuth-based strontium magnetic photocatalyst, its specific steps are as follows:

[0040] (1) prepare bismuth nitrate homogeneous solution

[0041] Using bismuth nitrate as raw material, using nitric acid solution as solvent, according to the ratio of the mass (g) of bismuth nitrate: the volume (mL) of nitric acid solution with a molar concentration of 5mol / L is 1:6, add bismuth nitrate and nitric acid solution into a reaction vessel, and mechanically stirred until the bismuth nitrate was completely dissolved to prepare a transparent bismuth nitrate homogeneous solution.

[0042] (2) Preparation of strontium ferrite suspension

[0043] Using strontium ferrite as raw material, using sodium dodecylbenzenesulfonate as dispersant, according to the mass (g) ratio of sodium dodecylbenzenesulfonate, bismuth nitrate and strontium ferrite is 1:20:6 Ratio, adding strontium ferrite and sodium dodecylbenzenesulfonate into the reaction vessel, and mechani...

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Abstract

The invention discloses a preparation method of a bismuth-based strontium magnetic photo-catalyst, and the bismuth-based strontium magnetic photo-catalyst, and belongs to the technical field of catalysts. According to the preparation method disclosed by the invention, bismuth nitrate and strontium ferrate are used as raw materials and sodium dodecyl benzene sulfonate is used as a dispersing agent so as to firstly prepare a precursor of the bismuth-based strontium magnetic photo-catalyst, and then a product is obtained by drying and roasting the precursor. The raw materials used in the invention are environment-friendly, the processing steps are simple, less equipment is used, the preparation period is short, the production is safe and the cost is low. The product prepared by the method disclosed by the invention has good magnetic properties, the saturation magnetism is 25.4emu/g, the coercive force is 4236.9G, the demagnetization resistance is high, and the catalyst can be conveniently recycled and reused, so the industrial production cost can be saved. The preparation method disclosed by the invention can be widely applied to preparation of the bismuth-based strontium magnetic photo-catalyst and a doped modified compound thereof, and the product prepared by the method disclosed by the invention can be widely used in the fields of organic pollutant degradation, photocatalytic water splitting hydrogen production, solar batteries and the like.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a preparation method of a bismuth-based strontium magnetic photocatalyst and a product thereof. Background technique [0002] The semiconductor bismuth trioxide has a band gap of 2.85eV, and is considered to be a visible light photocatalyst with great application potential. application. [0003] In the photocatalytic reaction, the bismuth trioxide catalyst needs to enhance its absorbance to visible light to improve the catalytic activity; at the same time, it is necessary to magnetize the bismuth trioxide to solve the secondary pollution caused by the difficult recovery after the reaction and the incomplete recovery, etc. question. At present, the demand for high-efficiency bismuth trioxide catalysts in the country is gradually increasing. Many researchers have successfully prepared nano-bismuth trioxide catalysts and carried out related doping and modification wo...

Claims

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Application Information

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IPC IPC(8): B01J23/18B01J35/00
Inventor 徐龙君谢太平刘成伦
Owner CHONGQING UNIV
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