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Preparation method of cobalt-nickel double metal hydroxide nano composite

A nanocomposite and hydroxide technology, applied in the field of nanomaterial preparation, can solve the problems of unreported catalysts, few cobalt-nickel double metal hydroxides, and few applications, and achieves efficient catalytic hydrogenation of p-nitrophenol, Beneficial for repeated use and mild reaction process

Active Publication Date: 2013-12-11
广东中科智道热源科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] To sum up, cobalt-nickel double hydroxides are less studied in terms of simple synthesis methods, and their applications are mostly used as electrode materials to study their electrochemical properties, and there are fewer applications in other aspects.
Especially as a catalyst in the solution system application has not been reported so far

Method used

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  • Preparation method of cobalt-nickel double metal hydroxide nano composite
  • Preparation method of cobalt-nickel double metal hydroxide nano composite
  • Preparation method of cobalt-nickel double metal hydroxide nano composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1: Preparation of graphene-like cobalt-nickel double hydroxide nanocomposites:

[0033] A. Weigh 0.146 grams of cobalt nitrate hexahydrate and 0.200 grams of polyvinylpyrrolidone (PVP) ultrasonically dissolved in 40 milliliters of distilled water, then transfer to a three-necked flask, turn on the electric mixer and set the speed of 1000 rpm to stir the solution.

[0034] B. Under stirring conditions, use a syringe pump to add dropwise 40 ml of newly configured aqueous solution containing 0.750 g of sodium borohydride, and finish adding dropwise in 15 minutes. Subsequently, 40 milliliters of an aqueous solution containing 0.119 grams of nickel chloride hexahydrate was added dropwise with a syringe pump, and the addition was completed in 15 minutes.

[0035] C. After adding all the reagents, the solution was stirred and reacted for one hour. After the reaction, the product obtained was centrifuged and washed three times with distilled water and ethanol, and th...

Embodiment 2

[0040] Embodiment 2: Catalytic p-nitrophenol hydrogenation reaction:

[0041] Add 0.1ml of 0.004M p-nitrophenol solution, 2ml of distilled water, and 1ml of 0.1M freshly prepared sodium borohydride solution to the quartz cuvette in sequence, and the color of the solution immediately changes from light yellow to bright yellow At the same time, the absorption peak was red-shifted from 317 nm to about 400 nm, and then 1 mg of prepared cobalt-nickel double hydroxide nanocomposite was added, and tested with a UV spectrophotometer at 200-500 nm every 1 minute , there is no obvious change until the peak around 400 nm.

[0042] Shimadzu UV-1750 ultraviolet spectrophotometer was used to test the catalytic properties of p-nitrophenol hydrogenation of the samples.

[0043] Figure 7 , Figure 8 Be the ultraviolet-visible absorption curve that the product of this example catalyzes p-nitrophenol hydrogenation at room temperature, by Figure 7 It can be seen that after adding 1 ml of fr...

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Abstract

The invention provides a method for preparing a cobalt-nickel double metal hydroxide nano composite through a hydrolytic process, belonging to the technical field of nano material preparation. The method is carried out under the condition of room temperature, dispenses with heating and temperature control devices and takes distilled water as a solvent, hydrolysis of sodium borohydride is utilized to provide an alkaline environment for reaction, the synthetic steps are simple, the yield is high and the obtained cobalt-nickel double metal hydroxide nano composite is a grapheme-like structure. The method is simple and energy-saving in preparation process and is suitable for industrial production. The obtained cobalt-nickel double metal hydroxide nano composite has good catalytic effects on hydrogenation of p-nitrophenol.

Description

Technical field: [0001] The invention belongs to the technical field of nanomaterial preparation, and specifically relates to the preparation of a graphene-like cobalt-nickel double metal hydroxide nanocomposite by hydrolysis reaction at room temperature, and the nanocomposite has the property of efficiently catalyzing the hydrogenation of p-nitrophenol. Background technique: [0002] Existing methods for preparing cobalt-nickel double hydroxide nanocomposites include self-assembly technology, electrodeposition method, co-precipitation method, template method, microemulsion method, sol-gel method and the like. [0003] Holland "Energy Journal" (Journal of Power Sources, 2007, volume 172, pages 970-974) reported that the one-dimensional layered α-Co( Oh) 2 and α-Ni(OH) 2 , and then they were dispersed in n-butanol to form a colloidal solution, and finally the two colloidal solutions were randomly co-stacked by self-assembly technology to obtain α-hydroxide nanocomposites wi...

Claims

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Application Information

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IPC IPC(8): B01J23/755C07C215/76C07C213/02
Inventor 宋吉明倪晶晶张洁张胜义牛和林毛昌杰沈玉华
Owner 广东中科智道热源科技有限公司
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