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A method for preparing composite nano-magnetic photocatalysts using waste alkaline batteries

An alkaline battery and nano-magnetic technology, applied in the direction of chemical instruments and methods, physical/chemical process catalysts, heterogeneous catalyst chemical elements, etc., can solve the problems of difficult recovery, low utilization efficiency of visible light, and electron-hole recombination of pure phase ZnO Faster and other issues, to achieve resource utilization, improve the efficiency of visible light utilization, simple and efficient resource utilization

Active Publication Date: 2021-03-23
YANAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Semiconductor nanoparticles can catalyze the degradation of organic pollutants under ultraviolet light or sunlight. Among them, ZnO has a wide band gap (3.4eV), good biocompatibility and easy preparation, and has attracted extensive attention. However, it has low utilization efficiency of visible light, pure Phase ZnO electron-hole pair recombination is fast and recovery is difficult, which limits its use

Method used

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  • A method for preparing composite nano-magnetic photocatalysts using waste alkaline batteries
  • A method for preparing composite nano-magnetic photocatalysts using waste alkaline batteries
  • A method for preparing composite nano-magnetic photocatalysts using waste alkaline batteries

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Experimental program
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Effect test

Embodiment 1

[0040] Step 1, dismantling the positive electrode and negative electrode battery materials of the waste alkaline battery, mechanically crushing the positive electrode and negative electrode battery materials respectively, and sieving to obtain positive electrode powder and negative electrode powder with a particle size of less than 200 μm;

[0041] Step 2, preparing a biological extraction culture solution, and carrying out strain cultivation;

[0042] When the solvent is distilled water, the solute is: 2.0g / L (NH 4 ) 2 SO 4 , 2.0g / LK 2 HPO 4 , 1.0g / LMgSO 4 ·7H 2 O, 0.3g / LCaCl 2 , 1.0g / LKCl, 30g / LFeSO 4 ·7H 2 Add the mixed bacteria solution of Thiobacillus thiooxidans (Acidithiobacillus thiooxidans, A.t.) and Thiobacillus ferrooxidans (Acidithiobacillus ferrooxidans, A.f.) in O, 10g / LS, wherein, the volume ratio of Thiobacillus thiooxidans and Thiobacillus ferrooxidans is 1 :1, the volume ratio of the mixed bacterial liquid to distilled water is 1:9, the temperature o...

Embodiment 2

[0050]Step 1, dismantling the positive electrode and negative electrode battery materials of the waste alkaline battery, mechanically crushing the positive electrode and negative electrode battery materials respectively, and sieving to obtain positive electrode powder and negative electrode powder with a particle size of less than 200 μm;

[0051] Step 2, preparing a biological extraction culture solution, and carrying out strain cultivation;

[0052] When the solvent is distilled water, the solute is: 3.0g / L (NH 4 ) 2 SO 4 , 2.5g / LK 2 HPO 4 , 1.5g / LMgSO 4 ·7H 2 O, 0.4g / LCaCl 2 , 2.0g / LKCl, 40g / LFeSO 4 ·7H 2 Add the mixed bacterial solution of Thiobacillus thiooxidans (Acidithiobacillus thiooxidans, A.t.) and Thiobacillus ferrooxidans (Acidithiobacillus ferrooxidans, A.f.) in 0, 15g / LS, be prepared into biological extraction solution, wherein, Thiobacillus thiooxidans and ferrous oxides The volume ratio of Thiobacillus is 1:1, the volume ratio of the mixed bacteria li...

Embodiment 3

[0062] Step 1, dismantling the positive electrode and negative electrode battery materials of the waste alkaline battery, mechanically crushing the positive electrode and negative electrode battery materials respectively, and sieving to obtain positive electrode powder and negative electrode powder with a particle size of less than 200 μm;

[0063] Step 2, preparing a biological extraction culture solution, and carrying out strain cultivation;

[0064] When the solvent is distilled water, the solute is: 4g / L (NH 4 ) 2 SO 4 、3.0g / LK 2 HPO 4 , 3g / LMgSO 4 ·7H 2 O, 0.5g / LCaCl 2 , 3.0g / LKCl, 50g / LFeSO 4 ·7H 2 Add the mixed bacteria solution of Thiobacillus ferrooxidans (Acidithiobacillus ferrooxidans, A.f.) in 0.20g / LS, and prepare the biological extraction solution, wherein, Thiobacillus oxidans and ferrous oxide The volume ratio of Thiobacillus is 1:1, the volume ratio of the mixed bacteria solution to distilled water is 1:9, the temperature of the bio-extraction solutio...

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Abstract

The invention discloses a method for preparing a composite nano-magnetic photocatalyst by using waste alkaline batteries, specifically: crushing the negative and positive electrode materials of the dismantled waste alkaline batteries, carrying out microbial extraction on the negative electrode materials to obtain the prepared iron The preparation solution A of the oxygen body, the preparation solution A is subjected to a hydrothermal synthesis reaction to obtain Mn x Zn 1‑x Fe 2 o 4 Ferrite solid powder precursor D, the positive electrode material is chemically leached to obtain the manganese-doped zinc oxide material precursor E, the Mn x Zn 1‑x Fe 2 o 4 Ferrite solid powder precursor D and manganese-doped zinc oxide material precursor E undergo coprecipitation reaction to obtain Mn x Zn 1‑x Fe 2 o 4 @Zn 0.9 mn 0.1 O nano-magnetic photocatalyst. The method of the invention is simple, efficient and environment-friendly, and realizes the resource utilization of waste batteries with high added value.

Description

technical field [0001] The invention belongs to the technical field of preparation methods of photocatalyst materials, and in particular relates to a method for preparing composite nanometer magnetic photocatalysts by using waste alkaline batteries. Background technique [0002] Semiconductor nanoparticles can catalyze the degradation of organic pollutants under ultraviolet light or sunlight. Among them, ZnO has a wide band gap (3.4eV), good biocompatibility and easy preparation, and has attracted extensive attention. However, it has low utilization efficiency of visible light, pure Phase ZnO electron-hole pair recombination is fast and recycling is difficult, which limits its use. Studies have found that spinel ferrite has a narrower band gap than ZnO, around 2eV or even lower, and is a potential class of visible light photocatalytic magnetic materials, because of its poor photocatalytic conversion efficiency and less pure phase. used directly in photocatalysis. Appropria...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/889H01M10/54H01M6/52B82Y30/00
CPCH01M6/52H01M10/54B82Y30/00B01J23/002B01J23/8892B01J2523/00B01J35/39B01J35/33B01J2523/27B01J2523/72B01J2523/842Y02W30/84
Inventor 牛志睿张扬巩帅郭静洪珍珍
Owner YANAN UNIV
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