Preparation method of manganese zinc ferrite/bismuth oxide magnetic photocatalyst

A technology of manganese zinc ferrite and photocatalyst, which is applied in the direction of physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, chemical instrument and method, etc., which can solve the problem of low photocatalytic efficiency and difficulty in recycling, etc. problem, to achieve the effect of simple operation, sufficient solid-liquid mixing, and less equipment

Inactive Publication Date: 2015-03-25
CHONGQING UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is aimed at the existing Bi 2 o 3 Due to the problems of low photocatalytic efficiency and difficult recovery, a preparation method of manganese zinc ferrite/bismuth oxide composite magnetic photocatalyst is proposed. The prepared manganese zinc ferrite/bismuth

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  • Preparation method of manganese zinc ferrite/bismuth oxide magnetic photocatalyst
  • Preparation method of manganese zinc ferrite/bismuth oxide magnetic photocatalyst
  • Preparation method of manganese zinc ferrite/bismuth oxide magnetic photocatalyst

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Embodiment 1

[0025] A kind of preparation method of manganese zinc ferrite / bismuth oxide composite magnetic photocatalyst, concrete steps are as follows:

[0026] (1) Preparation of manganese zinc ferrite

[0027] Weigh 1.91g of zinc sulfate, 2.77g of manganese sulfate, and 14.57g of ferric chloride hexahydrate and dissolve in water to obtain a solution, then add the zinc sulfate solution and ferric chloride solution into the manganese sulfate solution, and stir thoroughly to obtain a mixed solution. Weigh 16.40 g of ammonium oxalate and dissolve in water to obtain an ammonium oxalate solution. The mixed solution and the ammonium oxalate solution were heated to 80° C. under water bath conditions, and then the mixed solution was slowly added dropwise to the ammonium oxalate solution, and then the pH value was adjusted to 7 with ammonia water. The resulting oxalate precipitate was aged at room temperature for 12 hours, filtered, washed and dried, and finally placed in a muffle furnace and c...

Embodiment 2

[0033] A kind of preparation method of manganese zinc ferrite / bismuth oxide composite magnetic photocatalyst, concrete steps are as follows:

[0034] The (1) step is the same as embodiment 1.

[0035] The (2) step is the same as embodiment 1.

[0036] In step (3), take an appropriate amount of manganese zinc ferrite according to the mass ratio of manganese zinc ferrite and bismuth oxide as 15:100, add it to the bismuth oxide precursor prepared in step (2), and mechanically stir for 2 hours. The precursor of the gray manganese zinc ferrite / bismuth oxide composite magnetic photocatalyst was obtained. The precursor was filtered, washed, and dried in an oven at 60°C. The dried precursor was placed in a muffle furnace and calcined at 380° C. for 10 minutes, then taken out immediately, and the manganese zinc ferrite / bismuth oxide composite magnetic photocatalyst was obtained after cooling.

Embodiment 3

[0038] A kind of preparation method of manganese zinc ferrite / bismuth oxide composite magnetic photocatalyst, concrete steps are as follows:

[0039] The (1) step is the same as embodiment 1.

[0040] The (2) step is the same as embodiment 1.

[0041] In step (3), take an appropriate amount of manganese zinc ferrite according to the mass ratio of manganese zinc ferrite and bismuth oxide as 20:100, add it to the bismuth oxide precursor prepared in step (2), and mechanically stir for 3 hours. The precursor of the gray manganese zinc ferrite / bismuth oxide composite magnetic photocatalyst was obtained. The precursor was filtered, washed, and then dried in an oven at 60°C. The dried precursor was placed in a muffle furnace and calcined at 400° C. for 10 minutes, then taken out immediately, and the manganese zinc ferrite / bismuth oxide composite magnetic photocatalyst was obtained after cooling.

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Abstract

The invention discloses a preparation method of a manganese zinc ferrite/bismuth oxide magnetic photocatalyst, and belongs to the field of inorganic catalytic materials. The preparation method comprises the following steps of firstly, preparing a bismuth oxide precursor, then preparing a precursor of the manganese zinc ferrite/bismuth oxide composite magnetic photocatalyst, and finally, filtering, washing, drying and roasting to obtain the manganese zinc ferrite/bismuth oxide magnetic photocatalyst. According to the method, the preparation technology is simple; the used equipment is few; the preparation cycle is short; the production cost is low. The prepared magnetic composite photocatalyst is high in photocatalytic activity; the degradation rate of a 10mg/L rhodamine B solution for 2.5 hours reaches 99.1% under simulated sunlight, and the recovery rate reaches 89.3%; the manganese zinc ferrite/bismuth oxide composite magnetic photocatalyst which is recycled for three times has the degradation rate of 85% to rhodamine B within 2.5 hours. The manganese zinc ferrite/bismuth oxide magnetic photocatalyst prepared by the invention can be widely applied to the field of photo-catalyzed degradation of organic pollutants.

Description

technical field [0001] The invention relates to a preparation method of manganese zinc ferrite / bismuth oxide composite magnetic photocatalyst, which belongs to the technical field of inorganic environmental protection photocatalytic materials. Background technique [0002] Semiconductor photocatalytic technology has gradually become one of the hot research topics due to its broad application prospects in the degradation of organic pollutants in water. The development of semiconductor photocatalytic technology mainly focuses on two directions. One is the traditional photocatalytic material titanium dioxide (TiO 2 ) research once occupied half of the photocatalytic research technology, but TiO 2 The band gap is wide (3.2eV), and it can only absorb ultraviolet light, and has no response to visible light that accounts for 43% of solar energy; the second is to develop other new photocatalysts (such as Ag 3 PO 4 and its complexes, sulfides, bismuth compounds and cobalt compound...

Claims

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Application Information

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IPC IPC(8): B01J23/889C02F1/30H01F1/36
CPCY02W10/37
Inventor 徐龙君张兆娣刘成伦
Owner CHONGQING UNIV
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