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A kind of carbon-based zinc oxide nanosphere composite material and preparation method thereof

A technology of zinc oxide nano and carbon-based materials, which is applied in chemical instruments and methods, nanotechnology, nanotechnology, etc., can solve problems such as difficult growth and complex composition of carbon-based materials, and achieve simple process, which is conducive to industrial production and improves The effect of reactivity

Active Publication Date: 2016-01-27
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the complex composition of carbon-based materials, the uneven surface, and the existence of many active sites, it is difficult to control the growth of ZnO ordered nanostructures.

Method used

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  • A kind of carbon-based zinc oxide nanosphere composite material and preparation method thereof
  • A kind of carbon-based zinc oxide nanosphere composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1 Preparation of ZnO nanospheres on semi-focus substrate

[0029] Step 1, semi-coke is demineralized, including the following steps:

[0030] 1) Prepare hydrofluoric acid with a mass fraction of 25% and hydrochloric acid with a mass fraction of 15% respectively;

[0031] 2) Weigh 10g of sieved semi-coke, put it into 20mL of hydrofluoric acid, heat at 80°C for 2h, filter, and rinse with deionized water;

[0032] 3) Put the semi-coke obtained in step 2) into 20mL of hydrochloric acid, reflux at 80°C for 2 hours, filter, and boil and wash with deionized water until Cl- cannot be detected;

[0033] 4) Soak the coke obtained in step 3) in ethanol and 0.1mol / L NaOH solution for 6 hours.

[0034] Step 2, water bath synthesis

[0035] 1) Prepare 0.1mol / L zinc nitrate and 0.1mol / L hexamethylenetetramine solutions respectively, take 15mL each and add 50mL polytetrafluoroethylene to a hydrothermal kettle to form a mixed solution, and heat the mixed solution to 95°C, Th...

Embodiment 2

[0036] Example 2 Preparation of ZnO nanospheres by active semi-coke substrate

[0037] Prepare ZnO nanosphere according to the method for embodiment 1, difference is:

[0038] 1) Replace the semi-focus base with the active semi-focus;

[0039] 2) The mass fraction of hydrochloric acid solution is 30% when semi-coke is demineralized;

[0040] 3) The hydrothermal reaction temperature was set at 60°C.

Embodiment 3

[0041] Embodiment 3 active carbon substrate prepares ZnO nanosphere

[0042] Prepare ZnO nanosphere according to the method for embodiment 1, difference is:

[0043] 1) Replace the semi-coke base with activated carbon;

[0044] 2) The mass fraction of hydrochloric acid solution is 45% when activated carbon is demineralized.

[0045] 3) The hydrothermal reaction time was set to 2h.

[0046] After testing the nanomaterials obtained in the above-mentioned Examples 1-3, since the surface of the carbon-based material is successfully loaded with ZnO nano-spherical structure, compared with traditional ZnO nanoparticles, its surface area and adsorption performance can be improved, thereby improving its photocatalytic degradation performance. .

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Abstract

The invention relates to a carbon-based zinc oxide nanosphere composite material and a preparation method thereof. The composite material is in a spherical structure consisting of a demineralized carbon-based material and a zinc oxide nanosheet, wherein the diameter of a zinc oxide nanosphere is 4-10 microns. According to the technical scheme, an operation method is simple, the high-temperature calcination is omitted, the specific surface and reaction activity of the synthesized carbon-based zinc oxide nanosphere composite material are greatly increased, and then the performance such as photocatalysis are improved.

Description

technical field [0001] The invention relates to a carbon-based zinc oxide nanosphere composite material and a preparation method thereof, belonging to the field of material preparation. Background technique [0002] ZnO is a semiconductor material with direct bandgap and wide bandgap of the II-VI group, with a bandgap width of 3.37eV and an exciton binding energy of 60meV. It also has excellent conditions for emitting blue light or near-ultraviolet light. At present, ZnO has been widely used in microelectronics, solar cell window materials, microsensors, etc., and has also received increasing attention in photocatalysis, degradation of organic dyes, and sewage treatment. However, due to the poor surface adsorption performance and small specific surface area, the single ZnO material has serious photocorrosion problems, which greatly reduces its photocatalytic performance. Studies have shown that ZnO spherical structure has higher photocatalytic performance. In addition, it ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/06B82Y30/00B82Y40/00
Inventor 王习东陈燕张颖毅张作泰刘丽丽赵大伟
Owner PEKING UNIV