Preparation method and application of nickel-loaded SiO2@C core-shell material

A technology of supporting nickel and core-shell, applied in the field of catalysis, can solve the problems of inability to apply on a large scale, expensive precious metals, etc., and achieve the effects of simple and easy operation, high catalysis, and cheap and easy-to-obtain raw materials.

Inactive Publication Date: 2019-02-12
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As we all know, precious metals are expensive and cannot be applied on a large scale in industry

Method used

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  • Preparation method and application of nickel-loaded SiO2@C core-shell material
  • Preparation method and application of nickel-loaded SiO2@C core-shell material
  • Preparation method and application of nickel-loaded SiO2@C core-shell material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A Ni-loaded SiO 2 The preparation method of @C core-shell material comprises the following steps:

[0040] Step 1. Silica microspheres with a particle size of about 200 nm were synthesized by the traditional Stöber method. The specific operation is: add 1 mL of deionized water, 22.05 mL of ethanol, and 29.45 mL of concentrated ammonia solution in a beaker, stir at room temperature for 20 min, then add 5 mL of TEOS (tetraethyl orthosilicate) dropwise, and stir the milky white mixed solution at room temperature After 6 h, the white product was washed 3 times with ethanol by centrifugation, then placed at 60°C, dried in vacuum for 12 h, and set aside;

[0041] Step 2. Preparation of SiO by in situ polymerization 2 @RF / Ni. First, 0.2 g of SiO synthesized in step 1 2 Microspheres were ultrasonically dispersed in a mixture containing 17.6 mL of ethanol and 44 mL of water, 1.5 mmol of nickel acetate, 1.4 g of CTAB (cetyltrimethylammonium bromide), 0.22 g of resorcinol and ...

Embodiment 2

[0044] A kind of SiO loaded nickel in the present embodiment 2 The preparation method of @C core-shell material is the same as that of Example 1, the difference is,

[0045] The amount of nickel acetate added in step 2 is 0.5 mmol. Catalyst SCN-1 was obtained.

Embodiment 3

[0047] A kind of SiO loaded nickel in the present embodiment 2 The preparation method of @C core-shell material is the same as that of Example 1, the difference is,

[0048] The amount of nickel acetate added in step 2 was 1.0 mmol. Catalyst SCN-2 was obtained.

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Abstract

The invention provides a preparation method of a nickel-loaded SiO2@C core-shell material. The preparation method comprises the steps: firstly, utilizing a traditional St-ber method to synthesize a silicon dioxide template; then preparing SiO2@RF / Ni by an in situ polymerization method; roasting in hydrogen-argon mixed gas to obtain a final catalyst SiO2@C / Ni. The preparation method has a simple process and can be used for preparing catalysts with different nickel loading amounts; furthermore, the catalyzing performance of the prepared catalyst is excellent and is even higher than that of mostprecious metal catalysts. The catalyst is a high-efficiency catalyst which has the advantages of economical performance, environmental friendliness, easiness in recycling and cycle use.

Description

technical field [0001] The invention relates to the technical field of catalysis, in particular to a nickel-loaded SiO 2 Preparation method of @C core-shell material and application of the core-shell material in catalysis of p-nitrophenol. Background technique [0002] As people are paying more and more attention to environmental protection and water pollution is particularly serious, people are looking for various fast and effective methods to degrade organic pollutants in water. Among them, p-nitrophenol (4-NP) is a common organic pollutant, which is highly toxic and difficult to be biodegraded. It is generally common in industrial wastewater and agricultural wastewater. Therefore, researchers have adopted various methods to degrade p-nitrophenol in wastewater. Para-aminophenol (4-AP) is an important organic compound, which is widely used in synthetic dyes, medicine, biology, rubber and sensors. It is gratifying that 4-AP can be prepared by reducing 4-NP. It can be see...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J35/08C02F1/70C02F101/38
CPCB01J23/755B01J35/08C02F1/70C02F2101/38
Inventor 徐洁杨晓闪王振威张迎九
Owner ZHENGZHOU UNIV
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