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Fluorescence doping carbon nanometer N,B-CDs catalyst as well as preparation method and application thereof

A technology of carbon nanometers and catalysts, applied in the field of biochemical analysis, can solve the problems of unfriendly environment and increased cost of raw materials, and achieve the effects of low cost, simple preparation method and good application prospects

Inactive Publication Date: 2018-09-11
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 1. The raw materials used and the prepared N,B,S-CDs materials contain sulfur elements, which have hidden dangers of being unfriendly to the environment;
[0008] 2. Due to the need to introduce sulfur, the cost of raw materials has increased

Method used

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  • Fluorescence doping carbon nanometer N,B-CDs catalyst as well as preparation method and application thereof
  • Fluorescence doping carbon nanometer N,B-CDs catalyst as well as preparation method and application thereof
  • Fluorescence doping carbon nanometer N,B-CDs catalyst as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0036] The preparation method of fluorescence-doped carbon nanomaterial N,B-CDs, the specific steps are:

[0037] Weigh 1.9 g of citric acid, 1.2 g of boric acid, and 1.2 g of urea and dissolve them in 10 mL of water, then transfer them to a polytetrafluoroethylene-lined autoclave, heat to 250 °C, and keep for 3 h to obtain a reddish-brown solution ; with 0.1 mol L -1 Adjust the pH to 7.0 with NaOH solution, then centrifuge at 10,000 rpm for 10 min, dissolve the obtained water for dialysis, and separate unreacted substances to obtain a brown N,B-CDs aqueous solution; freeze-dry to remove water, and then dissolve in deionized water at 4 ℃ and protected from light.

Embodiment 2

[0039] The experiment of using fluorescent doped carbon nanomaterials N,B-CDs to catalyze the degradation of MB, the specific steps are:

[0040] To 1800 μL N,B-CDs (0.1 mg / mL) and 200 μL H 2 o 2 (3 %) was added 2 mg of MB (that is, the concentration was 1.0 mg / mL), and the resulting mixed solution was placed in a small beaker, and stirred continuously for 1 h in the dark to allow MB and the catalyst to reach adsorption-desorption equilibrium , and then continue to irradiate with infrared light and stir the reaction to carry out the catalytic degradation experiment. The height of the light source from the liquid surface is about 30 cm, and continue to irradiate for 80 min to obtain a colorless solution. Take 80 μL of the solution for 0, 8, 16, 24, 32, 40, 48, 56, 64, 72 and 80 min to measure its UV-Vis spectrum, and record the absorbance corresponding to the maximum absorption wavelength of MB at 664 nm (see Figure 4 , Figure 5 ). The experimental results show that the flu...

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Abstract

The invention discloses a fluorescence doping carbon nanometer N,B-CDs catalyst, which is prepared from citric acid, boracic acid and urea as raw materials through a one-step hydrothermal method. Thepreparation method comprises the following steps of using citric acid, boracic acid and urea as prepolymers; providing a carbon source by citric acid; providing a nitrogen source by urea; providing aboron source by boracic acid for further preparing and obtaining the catalyst through the one-step hydrothermal method. The invention also provides application of the catalyst to photocatalytic degradation of methylene blue (MB). The excellent MB photocatalytic degradation capability (the degradation rate is as high as 97.8 percent) can be shown under visible light irradiation. The invention provides a novel preparation method with the advantages that the preparation process is simple, and the economic cost is realized. In addition, the prepared fluorescence doping carbon nanometer material has strong fluorescence; meanwhile, excellent stability and good water solubility are realized, so that good application prospects are realized in the fields of environment restoration, sewage treatment, separation science and the like.

Description

technical field [0001] The invention belongs to the field of biochemical analysis, in particular to a fluorescence-doped carbon nanometer N,B-CDs catalyst, a preparation method thereof and an application in photocatalytic degradation of methylene blue (abbreviated as MB). Background technique [0002] According to statistics, every 1 ton of dye produced in my country will discharge 744 tons of wastewater, and in the printing and dyeing process, the loss rate of dye wastewater is about 10% to 20%, of which about 50% enters the environment. Dye (color) is the earliest recognized type of pollutant in wastewater. Even if there is a small amount of dye in the water (for some dyes, the concentration is less than 1mg / L), there will be a color change. Discharge into the water will affect The photosynthesis of aquatic organisms also brings unpleasant sensations to people, and most of the organic dyes belong to the three substances that are refractory to "teratogenic, carcinogenic, an...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/30C02F101/36C02F101/38
CPCC02F1/30B01J27/24B01J37/10B01J37/32C02F2101/40C02F2101/38C02F2101/36C02F2305/10B01J35/39B01J35/23
Inventor 陈真诚薛茗月韩国成赵飞骏操良丽
Owner GUILIN UNIV OF ELECTRONIC TECH
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