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Preparation method for magnetic supported manganese dioxide catalyst

A manganese dioxide and catalyst technology, which is applied in the field of preparation of magnetically supported manganese dioxide catalysts, can solve problems such as single structure of manganese oxide, and achieve the effect of promoting catalytic effect.

Active Publication Date: 2016-11-09
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing a magnetically loaded manganese dioxide catalyst for overcoming the single structure of manganese oxide in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] FeCl 2 Dissolve it in water and configure it as a solution with a concentration of 3mol / L. Take 500mL of this solution and place it in a water bath with a constant temperature of 75°C. At the same time, add 3mL of 30% (mass fraction) hydrogen peroxide and a certain amount of NaOH dilute solution dropwise to maintain the pH The value was 13, reacted for 3 hours, transferred to an autoclave, raised the temperature to 180°C within 1 hour, continued to react for 8 hours, and naturally cooled to room temperature. During this process, a precipitate with a layered structure was formed, separated from the precipitate, and washed 3 times with deionized water. ; Add the precipitated solid to the sodium dodecylbenzenesulfonate solution with a concentration of 3 mol / L, the solid-to-liquid ratio is 1:20, stir in a water bath at 80°C for 8 hours, and wash with deionized water for 3 hours after magnetic field separation and dried at 90°C to obtain magnetic organic hydrotalcite. Add 4...

Embodiment 2

[0018] FeCl 2 Dissolve it in water and configure it as a solution with a concentration of 3mol / L. Take 500mL of this solution and place it in a water bath with a constant temperature of 80°C. At the same time, add 4mL of 30% (mass fraction) hydrogen peroxide and a certain amount of NaOH dilute solution dropwise to maintain the pH The value was 13, reacted for 3 hours, transferred to an autoclave, raised the temperature to 180°C within 1 hour, continued to react for 8 hours, and naturally cooled to room temperature. During this process, a precipitate with a layered structure was formed, separated from the precipitate, and washed 3 times with deionized water. ; Add the precipitated solid to the sodium dodecylbenzenesulfonate solution with a concentration of 4 mol / L, the solid-to-liquid ratio is 1:50, stir in a water bath at 80°C for 8 hours, and wash with deionized water for 3 hours after magnetic field separation and dried at 90°C to obtain magnetic organic hydrotalcite. Add 4...

Embodiment 3

[0021] FeCl 2 Dissolve it in water and configure it as a solution with a concentration of 2mol / L. Take 500mL of this solution and place it in a water bath with a constant temperature of 70°C. At the same time, add 2mL of 30% (mass fraction) hydrogen peroxide and a certain amount of NaOH dilute solution dropwise to maintain the pH The value is 12, react for 2 hours, transfer to an autoclave, heat up to 150°C within 1 hour, continue to react for 4 hours, and naturally cool to room temperature. During this process, a precipitate with a layered structure is formed. The precipitate is separated and washed twice with deionized water. ; Add the precipitated solid to the sodium dodecylbenzenesulfonate solution with a concentration of 2mol / L, the solid-to-liquid ratio is 1:10, stir in a water bath at 50°C for 2 hours, and wash with deionized water for 2 hours after magnetic field separation and drying at 70°C to obtain magnetic organic hydrotalcite. Add 2 mol of (3-aminopropyl) trieth...

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PUM

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Abstract

The invention discloses a preparation method for a magnetic supported manganese dioxide catalyst. The preparation method comprises the following successive steps: adding hydrogen peroxide and a dilute solution of NaOH into a FeCl2 solution drop by drop, carrying out stirring, then transferring the obtained mixture into an autoclave, continuing a reaction, then carrying out natural cooling to room temperature so as to obtain a solid precipitate and adding the solid precipitate into a sodium dodecyl benzene sulfonate solution so as to obtain magnetic organic hydrotalcite; preparing a solution from (3-aminopropyl)triethoxysilane, salicylaldehyde and manganese chloride tetrahydrate according to a mol ratio of 1: 1: 1, and adding the magnetic organic hydrotalcite so as to form manganese-containing organic complex pillared hydrotalcite; and roasting the manganese-containing organic complex pillared hydrotalcite in a muffle furnace at 400 to 550 DEG C for 6 to 8 h, wherein elements like carbon and nitrogen in the manganese-containing organic complex pillared hydrotalcite are converted into gas and escape to form channels, so the magnetic supported manganese dioxide catalyst is obtained. The magnetic supported manganese dioxide catalyst with such a structure is beneficial for adsorption and catalysis of pollutants and facilitates separation.

Description

technical field [0001] The invention relates to the development of new materials for environmental pollution control, in particular to a preparation method of a magnetically loaded manganese dioxide catalyst. Background technique [0002] Hydrotalcite-like compounds (LDHs) are compounds formed by stacking interlayer anions and positively charged laminates. The general formula of hydrotalcite chemical structure is: [M 2+ 1-x m 3+ x(OH) 2 ] x+ [(A n- ) x / n mH 2 O], where M 2+ and M 3+ are the divalent and trivalent metal cations, such as Mg, located on the host laminates, respectively 2+ 、Ni 2+ , Zn 2+ , Mn 2+ 、Cu 2+ 、Co 2+ , Pd 2+ , Fe 2+ Equal divalent cations and Al 3 + 、Cr 3+ 、Co 3+ , Fe 3+ and other trivalent cations can form hydrotalcite; A n– It is an interlayer anion, which can include inorganic anion, organic anion, complex anion, same polyanion and heteropolyanion; x is M 3+ / (M 2+ +M 3+ ) The molar ratio is about 4:1 to 2:1; m is the number...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01J35/10
CPCB01J23/8892B01J35/33B01J35/60
Inventor 黄文艳赵文昌
Owner CHANGZHOU UNIV
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