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Two-dimensional ultrathin double-metal hydroxide nanosheet and preparation method thereof

A hydroxide and bimetal technology, applied in the field of two-dimensional ultra-thin bimetal hydroxide nanosheets and its preparation, can solve the problems of restricting large-scale production, complex process, high cost, etc., and achieve good oxygen evolution performance and operation Simple, low-cost effect

Active Publication Date: 2017-06-27
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the liquid phase exfoliation method is limited by its large-scale production due to its complicated process, long time-consuming and high cost.

Method used

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  • Two-dimensional ultrathin double-metal hydroxide nanosheet and preparation method thereof
  • Two-dimensional ultrathin double-metal hydroxide nanosheet and preparation method thereof
  • Two-dimensional ultrathin double-metal hydroxide nanosheet and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] 1. The preparation of bulk layered cobalt-iron hydroxide comprises the following steps:

[0043] (1), 0.3mol Fe(NO 3 ) 3 9H 2 O and 0.9mol Co(NO 3 ) 2 ·6H 2 O (the molar ratio of cobalt to iron is 3:1) mixed solution is prepared with deionized water as solvent; (2), 1.92mol NaOH and 0.8mol NaOH 2 CO 3 The mixed solution was prepared with deionized water as the solvent; (3) 30 mL of each of the above two mixed solutions were added to a 100 mL beaker at the same time, and after stirring for 15 min, transferred to a 100 mL stainless steel reaction kettle, and after hydrothermal reaction at 80 ° C for 48 h, the natural Cool to room temperature. Washing with water and ethanol three times respectively, suction filtering and drying in a vacuum oven at 60°C for 10 hours to obtain the bulk layered cobalt-iron hydroxide;

[0044] 2. Treating the bulk layered cobalt-iron hydroxide with argon plasma to prepare two-dimensional ultra-thin cobalt-iron hydroxide nanosheets.

...

Embodiment 2

[0052] 1. The preparation of bulk layered cobalt-iron hydroxide comprises the following steps:

[0053] (1), 0.3mol Fe(NO 3 ) 3 9H 2 O and 0.9mol Co(NO 3 ) 2 ·6H 2 O (the molar ratio of cobalt to iron is 3:1) mixed solution is prepared with deionized water as solvent; (2), 1.92mol NaOH and 0.8mol NaOH 2 CO 3 The mixed solution was prepared with deionized water as the solvent; (3) 30 mL of each of the above two mixed solutions were added to a 100 mL beaker at the same time, and after stirring for 15 min, transferred to a 100 mL stainless steel reaction kettle, and after hydrothermal reaction at 80 ° C for 48 h, the natural Cool to room temperature. Wash with water and ethanol three times respectively, filter with suction and dry in a vacuum oven at 60° C. for 10 h to obtain the bulk layered cobalt-iron hydroxide.

[0054] 2. Treating the bulk layered cobalt-iron hydroxide with nitrogen plasma to prepare two-dimensional ultra-thin cobalt-iron hydroxide nanosheets.

[00...

Embodiment 3

[0062] 1. The preparation of bulk layered cobalt aluminum hydroxide comprises the following steps:

[0063] (1), 0.3mol Al(NO 3 ) 3 9H 2 O and 0.9mol Co(NO 3 ) 2 ·6H 2 O (the molar ratio of cobalt to aluminum is 3:1) mixed solution is prepared with deionized water as solvent; (2), 1.92mol NaOH and 0.8mol NaOH 2 CO 3 The mixed solution was prepared with deionized water as the solvent; (3), 30 mL of each of the above two mixed solutions were added to a 100 mL beaker at the same time, after stirring for 15 minutes, transferred to a 100 mL stainless steel reaction kettle, and after hydrothermal reaction at 100 °C for 24 hours, Naturally cool to room temperature. Wash with water and ethanol three times respectively, filter with suction and dry in a vacuum oven at 60° C. for 10 h to obtain the bulk layered cobalt aluminum hydroxide.

[0064] 2. Treating the bulk layered cobalt aluminum hydroxide with argon plasma to prepare two-dimensional ultrathin cobalt aluminum hydroxide...

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Abstract

The invention discloses a method of preparing a two-dimensional ultrathin double-metal hydroxide nanosheet by a dry method. The method comprises the step of peeling a bulk phase laminated metal hydroxide by plasma to obtain the two-dimensional ultrathin double-metal hydroxide nanosheet by taking one of argon, nitrogen or oxygen as reactive gas. The method of preparing the two-dimensional ultrathin double-metal hydroxide nanosheet is simple to operate, short in consumed time and low in cost and is suitable for peeling all ulk phase laminated metal hydroxides with hydrotalcite structures.

Description

technical field [0001] The invention belongs to the technical field of exfoliation of layered double metal hydroxides, and in particular relates to a two-dimensional ultrathin double metal hydroxide nanosheet and a preparation method thereof. Background technique [0002] Layered double hydroxides (LDHs) are also known as hydrotalcite compounds, including hydrotalcite and hydrotalcite-like compounds, which are composed of two or more metal elements Hydroxide with layered crystal structure of hydrotalcite. The chemical formula of layered double metal hydroxide is: [0003] [M Ⅰ 1－x m Ⅱ x (OH) 2 ] x+ (A n－ ) x / n mH 2 o [1-2] , where M Ⅰ =Mg 2+ 、Ni 2+ , Fe 2+ 、Co 2+ , Mn 2+ Wait, M Ⅱ =Al 3 + , Fe 3+ 、Ti 4+ Wait, An － is the interlayer anion, and m is the number of interlayer water molecules. For example: MgAlLDHs, CoFeLDHs, NiCoLDHs, NiFeLDHs, CoAlLDHs, etc. [0004] LDHs are usually prepared by co-precipitation method, hydrothermal method, anion exchan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B13/14C01G51/04C01G53/04B82Y40/00
CPCC01B13/145C01G51/04C01G53/04C01P2002/72C01P2004/03C01P2004/04C01P2004/24
Inventor 王双印王燕勇
Owner HUNAN UNIV
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