Nanometer material as well as preparation method and application thereof

A nanomaterial and carbon nanotube technology, applied in the field of materials, can solve the problems of low biodegradability and poor removal effect, and achieve the effects of simple operation, cost saving and reduced use

Inactive Publication Date: 2019-06-21
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a nanomaterial and its preparation method and application, which solves the technical problems of low biodegradability and poor removal effect when the existing laccase is used alone

Method used

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  • Nanometer material as well as preparation method and application thereof
  • Nanometer material as well as preparation method and application thereof
  • Nanometer material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Preparation of Nanomaterials

[0033] (1) Accurately weigh 20 mg of carbon nanotube powder with an analytical balance, add it into a 250 mL Erlenmeyer flask filled with pure water, and prepare a 0.08 g / L carbon nanotube solution.

[0034] (2) Using an analytical balance, accurately measure 15 mg of laccase and add it to the above-mentioned Erlenmeyer flask, that is, mix the laccase and carbon nanotubes according to the mass ratio of laccase:carbon nanotubes=3:4 to obtain a mixed solution.

[0035] (3) Put the above mixed solution into an oscillator with a temperature of 10° C. and a rotation speed of 250 rpm for 30 minutes to vibrate for 30 minutes to immobilize the laccase on the carbon nanotubes to obtain nanomaterials.

[0036] Such as figure 1 As shown, in this example, laccase was successfully immobilized on carbon nanotubes.

Embodiment 2

[0038] In this example, the nanomaterials prepared in Example 1 were fitted to the Langmuir model and the Freundlich model respectively.

[0039] After the fitting of the Langmuir model and the fitting of the Freundlich model are carried out to the nanomaterial provided in Example 1, it is found that the fitting of the Langmuir model of the nanomaterial is better than the fitting of the Freundlich model, and the correlation coefficient R 2 It is 0.9973, reaching more than 0.99, indicating that the process of carbon nanotube adsorption of laccase in this nanomaterial is reversible adsorption, and it is unimolecular adsorption, indicating that the adsorption is physical adsorption.

Embodiment 3

[0041] In this example, the carbon nanotubes without laccase immobilization were used as the control group, and the nanomaterials prepared in Example 1 were used as the experimental group to conduct sewage treatment tests.

[0042] (1) Add the nanomaterial provided in Example 1 (100mL concentration is 0.08g / L) to 100mL Congo red standard solution with an initial concentration of 40mg / L, at a temperature of 25°C and an oscillator speed of 150rpm, carry out for 30min Adsorption experiment.

[0043] (5) At 0, 20, 40, 60, 80, 10, 120, 140, 160, 180, and 200 minutes of adsorption, pipette the nanomaterial with a syringe and filter it with a filter, then detect it with a UV-Vis spectrophotometer, Measure the concentration of the remaining dye in the solution, calculate the removal rate according to the standard curve, and draw the relationship between the removal rate and the reaction time.

[0044] Such as figure 2 As shown, the nanomaterial provided by Example 1 of the present ...

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Abstract

The invention relates to the technical field of a material, in particular to a nanometer material as well as a preparation method and application thereof. The invention discloses the nanometer material. The nanometer material comprises a carbon nanotube and laccase adsorbed on the carbon nanotube, wherein the adsorption is physical adsorption. In the nanometer material, the laccase is fixed by thecarbon nanotube and the free laccase is aggregated, so that the contact area of the laccase and pollutants is increased, the defect that the laccase has low biodegradability in a solution is remedied, and the biochemical degradation efficiency is improved. In addition, the carbon nanotube adsorbs the pollutants, and the degraded site can adsorb new pollutants again through the biochemical degradation of the laccase and can be reused, so that the use of the carbon nanotube is reduced and the cost is greatly saved. According to experimental data, the removal rate of Congo red by the nanometer material is 96 percent, and the used time is only half of that of the carbon nanotube when the removal rate of the Congo red reaches to 80 percent, so the technical problems that the biodegradability is low and the removing effect is bad when the existing laccase is singly used are solved.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a nanometer material and its preparation method and application. Background technique [0002] Enzymes are active proteins that can catalyze and accelerate biochemical and chemical reactions, and have been widely used in food technology, textile technology, fruit pulp brewing and other processes. Among them, laccase is a protein that binds multiple copper ions, belongs to cerulus oxidase, and exists in mushrooms, bacteria and plants. Laccase can survive in the air, and the only product after the reaction is water. It is essentially an environmentally friendly enzyme that can decolorize papermaking or printing and dyeing wastewater, and catalyze lignin degradation in pulp production. However, when only laccase is used for simple biochemical degradation, since laccase mainly exists in the form of free laccase in solution, and the biochemical degradation ability of free laccase i...

Claims

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Application Information

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IPC IPC(8): C02F3/34C02F101/30
Inventor 张雯翔周文婷杨奇罗秋华周丹丹
Owner GUANGDONG UNIV OF TECH
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