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

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...

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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 ferroferric oxide, which belongs to soft magnetic material, and the residual magnetization and coercive force are low and close to zero, which is not conducive to the recovery and reuse of the catalyst, and is not conducive to Reduce production costs; (3) The preparation process of the bismuth-doped magnetic photocatalyst is complex, involving many instruments and equipment and time-consuming, thereby increasing production costs

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