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Manufacturing method of dual-template of three-dimensionally ordered macroporous lanthanum manganate with mesoporous wall of hole

A three-dimensional ordered, dual-template technology, applied in the direction of manganate/permanganate, etc., to achieve the effect of cheap raw materials, simple preparation process, and good application prospects

Inactive Publication Date: 2010-12-08
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, domestic and foreign literature and patents have not yet reported the preparation method of this dual-mode pore structure lanthanum manganate

Method used

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  • Manufacturing method of dual-template of three-dimensionally ordered macroporous lanthanum manganate with mesoporous wall of hole
  • Manufacturing method of dual-template of three-dimensionally ordered macroporous lanthanum manganate with mesoporous wall of hole

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: Weigh 12.99g La (NO 3 ) 3 ·6H 2 O and 8.32 ml of 50% Mn (NO 3 ) 2The aqueous solution was placed in a 50 mL beaker, 3 mL of polyethylene glycol 400 was added, and after magnetic stirring for 4 h, a homogeneous solution was formed, and this solution was the precursor solution. Weigh 1.0 g of L-lysine with 2 mol / L nitric acid solution to adjust the pH of the solution to 6. After magnetic stirring for 1 h, a homogeneous solution was formed. This solution was added to the precursor salt solution, followed by 9 mL of methanol. The above mixture was poured into a 50 mL beaker containing 1.0 g of polymethyl methacrylate (PMMA) hard template. In order to maintain the original orderly arrangement of PMMA, no stirring was performed during the pouring of the mixed solution. The mixed solution was immersed in PMMA for about 5 hours, and the samples obtained by suction filtration were dried at room temperature for 24 hours, and then the samples were loaded into a ...

Embodiment 2

[0018] Embodiment 2: Weigh 12.99g La (NO 3 ) 3 ·6H 2 O and 8.32 ml of 50% Mn (NO 3 ) 2 The aqueous solution was placed in a 50 mL beaker, 3 mL of polyethylene glycol 400 was added, and after magnetic stirring for 4 h, a homogeneous solution was formed, and this solution was the precursor solution. Weigh 4.0 g of L-lysine and adjust the pH to 6 with 2 mol / L nitric acid solution. After magnetic stirring for 1 h, a homogeneous solution is formed. This solution is added to the precursor salt solution, followed by 2 mL of methanol. The above mixture was poured into a 50 mL beaker containing 1.0 g of PMMA hard template. In order to maintain the original orderly arrangement of PMMA, no stirring was performed during the pouring of the mixed solution. The mixed solution was immersed in PMMA for about 5 hours, and the samples obtained by suction filtration were dried at room temperature for 24 hours, and then the samples were loaded into a magnetic boat and placed in a tube furnace...

Embodiment 3

[0019] Embodiment 3: Weigh 12.99g La (NO 3 ) 3 ·6H 2 O and 8.32 ml of 50% Mn (NO 3 ) 2 The aqueous solution was placed in a 50 mL beaker, 3 mL of polyethylene glycol 400 was added, and after magnetic stirring for 4 h, a homogeneous solution was formed, and this solution was the precursor solution. Weigh 1.0 g of triblock copolymer P123 into a 50 mL beaker, add 10 mL of anhydrous methanol, magnetically stir for 1 h to form a homogeneous solution, add this solution to the precursor salt solution, and then add 4 mL of methanol. The above mixture was poured into a 50 mL beaker containing 1.0 g of PMMA hard template. In order to maintain the original orderly arrangement of PMMA, no stirring was performed during the pouring of the mixed solution. The mixed solution was immersed in PMMA for about 5 hours, and the samples obtained by suction filtration were dried at room temperature for 24 hours, and then the samples were loaded into a magnetic boat and placed in a tube furnace. ...

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Abstract

The invention discloses a manufacturing method of a dual-template of three-dimensionally ordered macroporous lanthanum manganate with a mesoporous wall of hole, comprising the following steps: taking a polymethyl methacrylate (PMMA) microballoon as a hard template, L-lysine or a triblock copolymer P123 as a soft template, polyethylene glycol 400 as an additive, and methanol and water as solvents, and then dipping the PMMA hard template in mixed solution containing a soft template agent, the additive, the solvents and soluble metal salt to finally obtain the perovskite oxide LaMnO3 of a three-dimensionally ordered macroporous structure with the mesoporous wall of hole using a two-step roasting method (roasting in nitrogen atmosphere followed by air atmosphere). The manufacturing method has the characteristics of cheap and available raw materials, simple manufacturing process, controllable particle shape and controllable size of a hole for the product and the like.

Description

technical field [0001] The invention relates to a method for preparing a three-dimensional ordered macroporous perovskite type oxide with mesoporous pore walls, in particular to the preparation of a three-dimensional ordered macroporous perovskite with mesoporous pore walls by using soft and hard dual templates type oxide LaMnO 3 Methods. Background technique [0002] Porous perovskite oxides have great application prospects in the fields of physics and chemistry such as electricity, magnetism, adsorption, and catalysis due to their high specific surface area, large pore volume, and well-developed pore structure. The macroporous structure can reduce the mass transfer resistance and promote the guest molecules to reach the active site, and the mesoporous structure can significantly increase the specific surface area, which is conducive to the adsorption and diffusion of reactant molecules. Ore-type oxides will have more excellent properties. [0003] Three-dimensional orde...

Claims

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Application Information

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IPC IPC(8): C01G45/12
Inventor 戴洪兴刘雨溪张磊邓积光蒋海燕李欣尉李少博何洪
Owner BEIJING UNIV OF TECH
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