Preparation method of magnetic synergistic cobalt oxide catalyst

A technology of cobalt oxide and catalyst, which is applied in the field of preparation of magnetic cobalt oxide catalyst, can solve problems such as the single structure of cobalt oxide, achieve good catalytic effect and promote 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

[0005] The purpose of the present invention is to provide a method for preparing a magnetic cobalt oxide catalyst for overcoming the single structure of cobalt oxide in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] 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

[0017] 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

[0020] 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. (3-Aminopropyl)triethoxysilane, sal...

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PUM

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Abstract

The invention discloses a preparation method of a magnetic synergistic cobalt oxide catalyst. The method sequentially comprises the steps of: under a constant temperature waterbath condition, adding hydrogen peroxide and a NaOH dilute solution dropwise into a FeCl2 solution, performing stirring, then transferring the mixture into an autoclave, further carrying out reaction, and performing naturally cooling to room temperature to obtain solid sediment, adding the solid sediment into a sodium dodecyl benzene sulfonate solution to obtain magnetic organic hydrotalcite; making (3-aminopropyl)triethoxysilane, salicylaldehyde and cobalt chloride into a solution according to (molar ratio) 1:1:1, then adding the magnetic organic hydrotalcite to form cobalt-containing organic complex pillared hydrotalcite; and putting the cobalt-containing organic complex pillared hydrotalcite into a muffle furnace, performing roasting at 400-550DEG C for 6-8h, converting the carbon, nitrogen and other elements therein into gas and making the gas overflow to form a pore channel, thus obtaining the magnetic synergistic cobalt oxide catalyst. The structure is in favor of adsorption and catalysis of pollutants, and is also beneficial to 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 magnetic cobalt oxide 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 of interlayer w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75B01J35/10
CPCB01J23/75B01J35/0033B01J35/10
Inventor 黄文艳赵文昌
Owner CHANGZHOU UNIV
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