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FeOOH coated Mn3O4 composite material as well as preparation method and application thereof

A composite material and reaction technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problems of low oxidant utilization efficiency and slow reaction rate, etc., and achieve sustainable recycling Use, fast response rate, obvious effect

Active Publication Date: 2021-08-17
LOGISTICAL ENGINEERING UNIVERSITY OF PLA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with the homogeneous reaction, the reaction rate of the heterogeneous method is slow, and the utilization efficiency of the oxidant is not high. How to accelerate the redox cycle of the transition metal in the reaction and improve the utilization efficiency of the oxidant in the reaction is to improve the heterogeneous Fenton-like reaction. Core Issues of Effectiveness

Method used

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  • FeOOH coated Mn3O4 composite material as well as preparation method and application thereof
  • FeOOH coated Mn3O4 composite material as well as preparation method and application thereof
  • FeOOH coated Mn3O4 composite material as well as preparation method and application thereof

Examples

Experimental program
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Effect test

preparation example Fe

[0041] Preparation example FeOOH coated Mn 3 o 4 Preparation of composite materials

[0042] Include the following steps: (1) with 18mmol NaOH and a certain amount of K 2 FeO 4 Dissolve in 30mL deionized water in turn to form A liquid; (2) 9mmol MnCl 2 4H 2 O was dissolved in 70mL of deionized water, continuously stirred and heated in a water bath to 90°C to form liquid B; (3) Pour the prepared liquid A into liquid B drop by drop, and after stirring and reacting at 90°C for 2 hours, the prepared complex The solution was cooled to room temperature, and the unreacted ions in the solution were washed away with deionized water and absolute ethanol, and dried at 70°C to constant weight, that is, FeOOH-coated Mn 3 o 4 composite material.

[0043] In order to investigate different K 2 FeO 4 The effect of dosage on the final product activated PMS to remove dye, while keeping MnCl 2 4H2 Under the premise of constant O dosage, according to the mass ratio of theoretical FeOOH t...

Embodiment 1

[0044] Embodiment 1 Separate PMS degrades RhB

[0045] Pipette 5mL of the RhB stock solution (1g / L) into a 250mL beaker, put it into the rotor and stir in a constant temperature water bath for 30min. Then take 1mL of PMS stock solution (20g / L) and add it dropwise to the beaker, use boric acid (0.2M) and sodium tetraborate (0.1M) to adjust the pH value of the solution to 4, and replenish the volume of the adjusted solution to 100mL. At intervals of 5 minutes, take 2 mL of the solution with a syringe, quench the unreacted PMS with sodium thiosulfate after filtering with a 0.45 μm filter membrane, and detect the absorbance of the remaining pollutants, draw the pollutant degradation curve, and the results are as follows image 3 as shown in a.

Embodiment 2

[0046] Example 2 FeOOH coated Mn 3 o 4 (0:1) Composites activate PMS to degrade RhB

[0047] Weigh 20mg FeOOH coated Mn 3 o 4 (0:1) The composite material was sonicated in 80mL water for 5min, and after being uniformly dispersed, it was added to a 250mL beaker together with 5mL of RhB stock solution (1g / L), placed in the rotor and stirred in a constant temperature water bath for 30min. Then take 1mL of PMS stock solution (20g / L) and add it dropwise to the beaker, use boric acid (0.2M) and sodium tetraborate (0.1M) to adjust the pH value of the solution to 4, and replenish the volume of the adjusted solution to 100mL. At intervals of 5 minutes, take 2 mL of the solution with a syringe, quench the unreacted PMS with sodium thiosulfate after filtering with a 0.45 μm filter membrane, and detect the absorbance of the remaining pollutants, draw the pollutant degradation curve, and the results are as follows image 3 as shown in a.

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Abstract

The invention belongs to the technical field of water treatment functional materials, and particularly relates to a FeOOH coated Mn3O4 composite material as well as a preparation method and application thereof. The technical problem to be solved by the invention is to provide an efficient, rapid and high-stability catalyst. The invention provides a preparation method of a FeOOH coated Mn3O4 composite material. The preparation method comprises the following steps: (1) sequentially dissolving alkali and ferrate in deionized water to form a solution A; (2) dissolving a manganese source in deionized water, and continuously stirring and heating to 90 DEG C to form a solution B; and (3) dropwise pouring the prepared solution A into the solution B, reacting for 2 hours at 90 DEG C under a stirring condition, cooling the prepared compound solution to room temperature, washing off unreacted ions in the solution by using deionized water and absolute ethyl alcohol, and drying at 70 DEG C until the weight is constant, thereby obtaining the FeOOH coated Mn3O4 composite material. The method is simple, the prepared iron-manganese-based composite catalytic material is high in catalytic efficiency, PMS can be rapidly activated to degrade dye rhodamine B in water, and the catalyst can be recycled and continuously used.

Description

technical field [0001] The invention belongs to the technical field of water treatment functional materials, in particular to a kind of FeOOH coated Mn 3 o 4 Composite materials and their preparation methods and applications. Background technique [0002] As an industrial necessity, dyes are involved in many industries, such as leather, paper and textile industries, where a large amount of dye wastewater is discharged every day. According to statistics, there are currently more than 100,000 types of dyes used in industry, and more than 700,000 tons of dye wastewater are produced every year. If this kind of dye wastewater is not effectively treated and discharged into the environment, it will directly cause serious pollution of water bodies. In addition, due to the complexity of the dye structure, it is difficult to be effectively removed under natural conditions. Therefore, the decolorization and degradation of dyes is one of the main environmental problems faced at pres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J37/10C02F1/72
CPCB01J23/8892B01J37/10C02F1/722C02F1/725C02F2305/026C02F2101/308B01J35/23Y02W10/37
Inventor 徐啸邓小永赵志伟林润丹
Owner LOGISTICAL ENGINEERING UNIVERSITY OF PLA
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