Preparation method of photocatalytic lithium ferrite-titanium oxide composite block and composite block

A technology for catalyzing lithium ferrite and titanium oxide, which is applied in the field of photocatalysis, can solve the problems of high price, and achieve the effects of complete reaction, high catalytic activity and high photocatalytic activity

Active Publication Date: 2020-08-25
河南中顺过滤研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, raw materials such as titanium dioxide, zinc oxide, tin oxide, zirconium dioxide, and cadmium sulfide are often used to prepare photocatalysts in the field of photocatalysis. These raw materials are expensive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A photocatalytic lithium ferrite-titanium oxide composite block was prepared.

[0035] Step 1: Recycling of Lithium Ferrite Battery Cathode Material

[0036] Pulverize the positive pole piece of lithium ferrite battery waste, pass through a 70-mesh sieve, and roast the obtained powder at 600°C for 1 hour to obtain lithium ferrite positive electrode powder;

[0037] Step 2: Preparation of lithium ferrite block

[0038] Stir and mix the obtained lithium ferrite powder with a 4% polyvinyl alcohol resin solution by mass to form particles with good fluidity and a particle size of 0.25mm-0.45mm. The prepared lithium ferrite particles were put into a grinding tool and pressed into a flake-like block with a diameter of 4mm and a thickness of 0.5mm, and sintered at 950°C for 4h to obtain a lithium ferrite block.

[0039] Step Three: Coating with Titanium Oxide

[0040] Place the obtained lithium ferrite block in a chemical vapor deposition device and raise the temperature to 55...

Embodiment 2

[0049] A photocatalytic lithium ferrite-titanium oxide composite block was prepared.

[0050] Step 1: Recycling of Lithium Ferrite Battery Cathode Material

[0051] The positive pole pieces of lithium ferrite battery waste were crushed and passed through an 80-mesh sieve, and the obtained powder was calcined at 400° C. for 1.5 hours to obtain lithium ferrite powder. The obtained powder was washed with methanol and dried.

[0052] Step 2: Preparation of lithium ferrite block

[0053] Stir and mix the obtained lithium ferrite powder with a 4% polyvinyl alcohol resin solution by mass to form particles with good fluidity and a particle size of 0.25mm-0.60mm. The prepared lithium ferrite particles were put into a grinding tool and pressed into a flake-like block with a diameter of 10 mm and a thickness of 0.5 mm, and sintered at 1000° C. for 5 hours to obtain a lithium ferrite block.

[0054] Step Three: Coating with Titanium Oxide

[0055] Place the obtained lithium ferrite bl...

Embodiment 3

[0061] A photocatalytic lithium ferrite-titanium oxide composite block was prepared.

[0062] Step 1: Recycling of Lithium Ferrite Battery Cathode Material

[0063] The positive pole pieces of lithium ferrite battery waste were crushed and passed through an 80-mesh sieve, and the obtained powder was calcined at 500° C. for 2 hours to obtain lithium ferrite powder. The obtained powder was washed with ethanol and dried.

[0064] Step 2: Preparation of lithium ferrite block

[0065] Stir and mix the obtained lithium ferrite powder with a 4% polyvinyl alcohol resin solution by mass to form particles with good fluidity and a particle size of 0.25mm-0.60mm. Put the prepared lithium ferrite particles into a grinding tool and press them into a thin sheet-like block with a diameter of 4 mm and a thickness of 2.0 mm, and sinter at 1200 ° C for 6 hours to obtain a lithium ferrite block.

[0066] Step Three: Coating with Titanium Oxide

[0067] Place the obtained lithium ferrite block...

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Abstract

The invention discloses a preparation method of a photocatalytic lithium ferrite-titanium oxide composite block which is prepared from lithium ferrite battery waste. The preparation method comprises the following steps: step 1, crushing and sieving a positive pole piece of the lithium ferrite battery waste to enable the particle size to be not greater than 70 meshes, and roasting at 400-600 DEG Cfor not less than 1 hour to obtain lithium ferrite positive pole powder; step 2, granulating the lithium ferrite positive electrode powder, pressing into a block, and sintering at 900-1200 DEG C for 4-6 hours to obtain a lithium ferrite block; step 3, carrying out chemical vapor deposition on the lithium ferrite block to obtain the titanium oxide coating; and step 4, carrying out heat preservationat 350-400 DEG C in an air atmosphere for 2-3 h to obtain the photocatalytic lithium ferrite-titanium oxide composite block. The invention also discloses the photocatalytic lithium ferrite-titanium oxide composite block prepared by the method. According to the method, the photocatalytic lithium ferrite-titanium oxide composite block is prepared by taking the lithium ferrite battery waste as a rawmaterial, and an aluminum matrix is taken as a sintering agent so that the reaction is more thorough, and more energy is saved. The internal microstructure of the photocatalytic lithium ferrite-titanium oxide composite block prepared by the method is loose and porous, and the photocatalytic activity is high.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and in particular relates to a preparation method of a photocatalytic lithium ferrite-titanium oxide composite block and the composite block. Background technique [0002] Lithium ferrite batteries are made of lithium ferrite (LiFeO 2 ) The lithium-ion battery whose material is the positive electrode has many advantages such as high energy density, good safety performance, long cycle life, safety and environmental protection. In recent years, the rapid development of electric vehicles is accompanied by the scrapping of a large number of lithium ferrite batteries. Once there is no effective means of recycling scrapped batteries, it will bring huge waste of resources and environmental pollution. Lithium ferrite (LiFeO 2 ) belongs to the cubic crystal system. In the lithium ferrite battery, the lithium ferrite powder is bonded to the aluminum foil and connected to the positive electrode of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/462C04B35/622C04B41/87
CPCC04B35/462C04B35/62204C04B41/87C04B41/5041C04B41/009C04B2235/6567C04B41/4531C04B41/0072
Inventor 薛屺吴啸天
Owner 河南中顺过滤研究院有限公司
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