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Preparation method and application of copper-cobalt oxide loaded carbon nanofiber composite material

A technology of carbon nanofibers and composite materials, which is applied in the field of catalysis, can solve problems such as the reduction of catalytic efficiency, achieve the effects of accelerating reaction rate, increasing specific surface area, and avoiding agglomeration

Active Publication Date: 2021-01-29
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, smaller nanoparticles can easily aggregate to minimize their surface area, resulting in significantly lower catalytic efficiency

Method used

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  • Preparation method and application of copper-cobalt oxide loaded carbon nanofiber composite material
  • Preparation method and application of copper-cobalt oxide loaded carbon nanofiber composite material
  • Preparation method and application of copper-cobalt oxide loaded carbon nanofiber composite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A method for preparing a carbon nanofiber composite material loaded with copper-cobalt oxide in this embodiment comprises the following steps:

[0041] Step 1. Synthesize the electrospinning solution by heating and stirring

[0042]The specific operation is: first, 0.25 moL of Cu(NO 3 ) 2 ·3H 2 O and 0.5 moL of Co(NO 3 ) 2 ·6H 2 O was dissolved in 13.5 mL of deionized water and stirred evenly; then 0.5 g of cetyltrimethylammonium bromide (CTAB) was added and heated to 40 °C and the solution was stirred until transparent pink, indicating that the metal salt and surfactant CTAB was completely dissolved; finally, 1.5 g of polyvinyl alcohol (PVA) was slowly poured into the above mixed solution, and stirred at a constant temperature of 85 °C for 5 h; after natural cooling, the beaker was taken out and stirred slowly at room temperature overnight, marked as CuCo- PVA aqueous solution, standby;

[0043] Step 2. High-voltage electrospinning

[0044] First, wrap clean ti...

Embodiment 2

[0048] The preparation method of a carbon nanofiber composite material loaded with copper cobalt oxide in this embodiment is the same as that in embodiment 1, the difference is that

[0049] In step 1, only Cu(NO 3 ) 2 ·3H 2 The amount of O was 0.75 mol to obtain a CuO catalyst.

Embodiment 3

[0051] The preparation method of a carbon nanofiber composite material loaded with copper cobalt oxide in this embodiment is the same as that in embodiment 1, the difference is that

[0052] In step 1, only Co(NO 3 ) 2 ·6H 2 The amount of O was 0.75 moL to obtain Co 3 o 4 catalyst.

[0053] The following describes the performance test of the carbon nanofiber composite material in the embodiment of the present invention with reference to the accompanying drawings.

[0054] 1. For the prepared CuCo 2 o 4 The material is subjected to XRD test and morphology test of transmission electron microscope:

[0055] Such as figure 1 as shown, figure 1 Is the prepared CuO, Co 3 o 4 with CuCo 2 o 4 X-ray diffraction pattern of the catalyst.

[0056] Such as figure 2 as shown, figure 2 For composite CuCo 2 o 4 SEM image of the catalyst at 10000X.

[0057] image 3 and Figure 4 bimetallic salt CuCo 2 o 4 TEM images of the catalyst at 25000X and 100000X. It can be se...

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Abstract

The invention relates to a preparation method and application of a copper-cobalt oxide loaded carbon nanofiber composite material, and belongs to the technical field of catalysis. The material is a compound of electrospun fibers and bimetal nanoparticles. The preparation method comprises the following steps of: putting polyvinyl alcohol into an aqueous solution containing copper-cobalt metal salt,stirring at constant temperature, and carrying out high-voltage electrostatic spinning and heat treatment to form a bimetallic oxide nanoparticle catalyst. The invention also provides an applicationof the composite material in degradation of a high-toxicity pollutant 4-nitrophenol in a water body. On one hand, fibers obtained through a simple and feasible electrostatic spinning method are high in yield and large in specific surface area; and on the other hand, the copper and cobalt double-metal nanoparticles have high catalytic activity and are catalytically degraded into 4-aminophenol withlow toxicity in a sodium borohydride aqueous solution. Therefore, the composite material has high catalytic efficiency and is simple and convenient to operate in the aspect of degrading water pollutants, the finally obtained product is also an important medical intermediate, and the commercial value that waste is turned into wealth and two birds are killed with one stone is achieved.

Description

technical field [0001] The invention relates to the technical field of catalysis, in particular to a preparation method of a carbon nanofiber composite catalyst loaded with copper cobalt oxide and the application of the material in catalyzing p-nitrophenol. Background technique [0002] Nitrophenol isomers are a common class of organic compounds with high toxicity, high carcinogenicity and low biodegradability. They widely exist in industrial and agricultural production processes and cause serious pollution to global water resources. It has had a huge impact on people's daily life and has aroused people's great attention. [0003] According to toxicological research, 4-nitrophenol (4-NP) is one of the three isomers of nitrophenol and is the most harmful substance to the human body. It can easily cause inflammation and burns of the eyes, skin and respiratory tract. Meanwhile, 4-NP is not easy to degrade in sewage, and it is one of the potentially toxic organic pollutants. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75B01J35/00B01J35/06C02F1/70C02F101/38C02F101/34
CPCB01J23/75C02F1/70C02F2101/345C02F2101/38B01J35/393B01J35/58Y02W10/37
Inventor 徐洁张莹张迎九郭佳慧
Owner ZHENGZHOU UNIV
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