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Transition metal doped iron-manganese composite oxide as well as preparation method and application

A composite oxide, transition metal technology, applied in biochemical equipment and methods, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve problems such as secondary pollution, and achieve rich valence states. , the effect of large specific surface area

Pending Publication Date: 2021-12-31
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Transition metals (Co 2+ 、Cu 2+ 、Ni 2 + and Ce 2+ etc.) can activate persulfate, but the homogeneous reaction will cause secondary pollution, so the preparation of solid catalyst has attracted the attention of scholars

Method used

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  • Transition metal doped iron-manganese composite oxide as well as preparation method and application
  • Transition metal doped iron-manganese composite oxide as well as preparation method and application
  • Transition metal doped iron-manganese composite oxide as well as preparation method and application

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Effect test

Embodiment 1

[0027] A biological preparation method of transition metal-doped iron-manganese composite oxides, comprising the following steps:

[0028] (1) Inoculate Pseudomonas sp.F2 containing Fe under aseptic conditions 2+ and Mn 2+ culture medium, placed in a constant temperature air bath shaker, the rotation speed is 165rpm, and the culture temperature is 30°C. After 2 days of culture, continue to add transition metal Ni with a final concentration of 120mg / L to the medium. 2+ Solution, continue to cultivate for 5 days;

[0029] (2) Set aside the medium cultivated in step (1) for precipitation to obtain a black precipitate, pour off the supernatant, and pyrolyze the black precipitate and residual biological cells at 400°C for 2 hours, and obtain transition Metal-doped Fe-Mn composite oxide labeled Bio-FeMnNiO x .

Embodiment 2

[0031] A biological preparation method of transition metal-doped iron-manganese composite oxides, comprising the following steps:

[0032] (1) Inoculate Pseudomonas sp.F2 containing Fe under aseptic conditions 2+ and Mn 2+ Cultured in the culture medium, placed in a constant temperature air bath shaker, the rotation speed was 165rpm, and the culture temperature was 30°C. After 2 days of culture, the transition metal Co with a final concentration of 120mg / L was added to the medium. 2+ Solution, continue to cultivate for 5 days;

[0033] (2) Set aside the medium cultivated in step (1) for precipitation to obtain a black precipitate, pour off the supernatant, and pyrolyze the black precipitate and residual biological cells at 400°C for 2 hours, and obtain transition Metal-doped Fe-Mn composite oxide labeled Bio-FeMnCoO x .

Embodiment 3

[0035] A biological preparation method of transition metal-doped iron-manganese composite oxides, comprising the following steps:

[0036] (1) Inoculate Pseudomonas sp.F2 containing Fe under aseptic conditions 2+ and Mn 2+ Cultured in the culture medium, placed in a constant temperature air bath shaker, the rotation speed is 165rpm, and the culture temperature is 30°C. After 2 days of culture, the transition metal Cu with a final concentration of 120mg / L is continued to be added to the medium. 2+ solution, continue to cultivate for 5 days;

[0037] (2) Set aside the medium cultivated in step (1) for precipitation to obtain a black precipitate, pour off the supernatant, and pyrolyze the black precipitate and residual biological cells at 400°C for 2 hours, and obtain transition Metal-doped Fe-Mn composite oxide labeled Bio-FeMnCuO x .

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Abstract

The invention provides a transition metal doped iron-manganese composite oxide as well as a preparation method. Transition metal ions are oxidized into high-valence oxides by using the biological activity and growth metabolism process of Pseudomonas sp.F2, besides, the metal ions are oxidized and adsorbed on the surface of a biological iron-manganese oxide by taking the biological iron-manganese oxide as a carrier, and the generated precipitate is the biological iron-manganese composite oxide which is excessively doped with the metal ions. The transition metal ions are converted into transition metal doped iron-manganese composite oxide with rich valence states and large specific surface area in the metabolic process of the biological iron-manganese oxide and new living cells.

Description

technical field [0001] The invention belongs to the technical field of biomass materials, and in particular relates to a transition metal-doped iron-manganese composite oxide and its preparation method and application. Background technique [0002] Antibiotics are widely used to treat human and animal diseases due to their broad-spectrum antibacterial properties. The metabolism of antibiotics in the human body is very low, and 80% of antibiotics are excreted with urine and feces, and finally discharged into water bodies, polluting the water environment. The concentration of antibiotics in surface water is in the range of ng / L-μg / L, but the concentration in hospital wastewater can reach several mg / L, which is potentially dangerous to the environment and humans. [0003] The persulfate advanced oxidation method is based on the sulfate radical (SO 4 - ) An advanced oxidation technology, persulfate is activated to generate active groups (OH, SO 4 - 、· 1 o 2 ,), efficientl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P3/00B01J23/889C02F1/72C02F101/34C02F101/36C02F101/38C12R1/40
CPCC12P3/00B01J23/8892C02F1/722C02F1/725C02F2101/36C02F2101/38C02F2101/34B01J2523/00B01J2523/72B01J2523/842B01J2523/847B01J2523/845B01J2523/17B01J2523/3712
Inventor 张永军徐安琳吴东红樊思言孟通何益得张运海潘顺龙
Owner NANJING UNIV OF TECH
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