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a cu 2 o@cuo semi-core-shell nanocomposite material and preparation method thereof

A technology of nanocomposite material and core-shell structure, applied in the field of composite material and its preparation, can solve the problems of complex process, high cost, unfavorable electron transport, etc., and achieve the effect of low preparation cost, mild reaction conditions and simple process

Inactive Publication Date: 2017-11-03
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, in order to make nanoparticles biocompatible and have long-term stability in biomedical applications, the surface of nanoparticles needs to be modified by hydrophilicity, which is a complex process and high cost.
In addition, the general preparation method of traditional core-shell nanomaterials is to synthesize the inner core first, and then grow the shell with different systems on the outside. This method is more complicated, and all the preparations are complete core-shell structures. The advantages of the two substances cannot be effectively utilized at the same time, which is not conducive to electron transport, so a defect-type core-shell structure is needed for effective electron transport

Method used

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  • a cu <sub>2</sub> o@cuo semi-core-shell nanocomposite material and preparation method thereof
  • a cu <sub>2</sub> o@cuo semi-core-shell nanocomposite material and preparation method thereof
  • a cu <sub>2</sub> o@cuo semi-core-shell nanocomposite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 0.1 g of CNTs was ultrasonically dispersed in 100 mL of deionized water to prepare a CNTs dispersion. 1 g chitosan (CS) was dissolved in 100 mL 1% acetic acid aqueous solution to prepare 1 wt.% CS solution. 8 mL of CNTs dispersion and 2 mL of CS solution were ultrasonically mixed for 5 min. Add 0.2 mL of 1% glutaraldehyde aqueous solution and stir for 15 min. The mixture was poured into a template and freeze-dried for 24 h. Washing with water and ethanol several times and drying in vacuo yielded purified carbon sponges. The obtained carbon sponge structure is shown in Fig. from SEM figure 1 In a, it can be seen that the porous sponge structure based on CS is conducive to the adsorption of metal ions. figure 1 b is the rough structure of the CS surface after magnification, and the inset shows the CNTs protruding from the CS surface, which are used for electrical conduction in sensing. TEM figure 1 c, 1d also show CNTs embedded in CS.

[0033] Take 0.015 g carb...

Embodiment 2

[0036] 0.1 g of CNTs was ultrasonically dispersed in 100 mL of deionized water to prepare a CNTs dispersion. 1 wt.% CS solution was prepared by dissolving 1 g chitosan (CS) in 100 mL 1% acetic acid aqueous solution. 10 mL of CNTs dispersion and 2 mL of CS solution were ultrasonically mixed for 5 min. Add 0.2 mL of 1% glutaraldehyde aqueous solution and stir for 15 min. The mixture was poured into a template and freeze-dried for 24 h. Washing with water and ethanol several times and drying in vacuo yielded purified carbon sponges. Experiments have shown that changing the ratio of reactants within a certain range will not affect the material synthesis.

[0037] Take 0.015 g carbon sponge into 8 mL 0.1 M CuSO 4 The solution was adsorbed for 24 h, the remaining solution was removed, and 5 mL of 0.5 M NaBH was added dropwise on the surface 4 After reacting for 2 h, the remaining solution was removed and oxidized in air for 5 h, washed with ethanol and dried in an oven at 60 °C...

Embodiment 3

[0039] 0.1 g of CNTs was ultrasonically dispersed in 100 mL of deionized water to prepare a CNTs dispersion. 1 wt.% CS solution was prepared by dissolving 1 g chitosan (CS) in 100 mL 1% acetic acid aqueous solution. 8 mL of CNTs dispersion and 2 mL of CS solution were ultrasonically mixed for 5 min. Add 0.2 mL of 1% glutaraldehyde aqueous solution and stir for 15 min. The mixture was poured into a template and freeze-dried for 24 h. Washing with water and ethanol several times and drying in vacuo yielded purified carbon sponges.

[0040] Take 0.015 g carbon sponge into 8 mL 0.1 M CuSO 4 The solution was adsorbed for 24 h, the remaining solution was removed, and 5 mL of 0.4 M NaBH was added dropwise on the surface 4 After reacting for 2 h, the remaining solution was removed and oxidized in air for 2 h, washed with ethanol and dried in an oven at 60 °C. Obtain uniformly dispersed Cu 2 O@CuO half-core-shell nanoparticles. Experiments have shown that changing the concentrat...

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Abstract

The invention discloses a Cu2O@CuO semi-core-shell structure nano composite material and a preparation method therefor. The structure comprises porous carbon sponge and Cu2O@CuO semi-core-shell structure nanoparticles absorbed on the sponge. The carbon sponge employs crosslinked chitosan as a framework and CNTs are embedded into the crosslinked chitosan. The Cu2O@CuO semi-core-shell structure nanoparticles comprise a Cu2O core at the inner layer and a CuO shell at the outer layer. The CuO shell at the outer layer is a semi-shell structure formed on the surface of the carbon sponge. The preparation method is as follows: carbon sponge is prepared through an ice template method; copper sulphate is absorbed by the carbon sponge; the copper sulphate is subjected to in-situ reduction by sodium borohydride; further oxidation in the air is carried out; cleaning and drying are carried out. The method is advantaged by simple technology, mild reaction conditions, low preparation cost and good stability. In the prepared composite material, the CS plays a support role, the embedded CNTs play a role in electron conduction, the Cu2O@CuO semi-core-shell structure has advantages compared with a complete core-shell structure, namely, CuO at the outer layer play a main catalysis role, and the lower part of Cu2O at the inner layer contacts with the surface of the carbon sponge directly and plays a role in auxiliary catalysis and electron conduction. The composite material can be widely applied in the biosensor field.

Description

technical field [0001] The invention relates to a composite material and a preparation method thereof, in particular to a method of adsorbing and synthesizing Cu on carbon sponge 2 The invention discloses an O@CuO semi-core-shell structure nanocomposite material and a method thereof, belonging to the technical field of new composite materials. Background technique [0002] Due to a series of advantages such as good selectivity, high sensitivity, fast analysis speed, low cost, online continuous monitoring, high automation, miniaturization and integration, biosensors are widely used in environmental monitoring, fermentation technology, food engineering, clinical medicine, military and military medicine. and other fields are favored. Nano copper oxide (CuO) and cuprous oxide (Cu 2 O) has a catalytic effect on glucose and can be used for the detection of glucose in blood and food (Li, Y., Zhong, Y., Zhang, Y., Weng, W., & Li, S.(2015). Sensors & Actuators B Chemical , 735–743...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/26
Inventor 陈守刚李迎春赵明岗陈静丁龙江范思思梁静静
Owner OCEAN UNIV OF CHINA
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