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Fluorescent doped carbon nanometer photocatalyst and preparation method and application thereof

A photocatalyst and carbon nanotechnology, applied in the field of biochemical analysis, can solve problems such as limiting large-scale practical application, and achieve the effects of short preparation time, low cost, and simple equipment and instruments

Inactive Publication Date: 2016-06-15
GUILIN NORMAL COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Photocatalytic degradation of organic dyes in wastewater using semiconductor catalysts (such as zinc oxide and titanium dioxide) has been developed (LamSM, SinJC, AbdullahAZ, MohamedAR. Desalination and Water Treatment, 2012, 41 (1-3): 131-169), but existing Many photocatalysts commonly used in technology need to be irradiated by ultraviolet or near ultraviolet rays, which strictly limits their large-scale practical application, because there are only about 5% ultraviolet rays in sunlight, and the rest are 43% visible light and 52% infrared rays.

Method used

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  • Fluorescent doped carbon nanometer photocatalyst and preparation method and application thereof
  • Fluorescent doped carbon nanometer photocatalyst and preparation method and application thereof
  • Fluorescent doped carbon nanometer photocatalyst and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] The preparation method of fluorescence-doped carbon nanomaterial N, B, S-CDs, the specific steps are:

[0031] Weigh 2.1g of citric acid, 1.4g of thiourea, 1.4g of boric acid, 5mL of ethylenediamine and dissolve them in 5mL of water, then transfer to a polytetrafluoroethylene-lined autoclave and heat to 220°C at a rate of 10°C per minute. ℃, and kept for 3h, the obtained reddish-brown solution; with 1molL -1 Adjust the pH to 7.0 with NaOH solution, then centrifuge at 8000 rpm for 20 min, dissolve the obtained water, perform dialysis, and separate unreacted substances to obtain a brown N, B, S-CDs aqueous solution; rotary evaporation removes water, and then dissolves in deionized water in Store at 4°C protected from light.

Embodiment 2

[0033] The experiment of photocatalytic degradation of RhB using fluorescent doped carbon nanomaterials N, B, S-CDs, the specific steps are:

[0034] To 2700μL N, B, S-CDs (0.1mg / mL) and 300μL H 2 o 2 (3%), add 30mg of RhB (that is, the concentration is 10.0mg / mL), the resulting mixed solution is placed in a small beaker, first under dark conditions to continue stirring for 2h so that RhB and the catalyst reach adsorption-desorption equilibrium, and then Then continue to irradiate and stir the reaction under the natural light simulated by 300W xenon lamp to carry out the photocatalytic degradation experiment. The height of the light source from the liquid surface is about 20cm. color solution.

[0035] Take 100 μL of the solution for 0, 10, 20, 30, 40, 50, 60, 70, 80 and 90 min respectively to measure its UV-Vis spectrum, and record the absorbance corresponding to the maximum absorption wavelength of RhB at 554 nm (see Figure 4 , Figure 5 ). Experimental results show th...

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Abstract

The invention provides fluorescent doped carbon nanometer N,B,S-CDs and a preparation method and application thereof. The method takes citric acid, boracic acid, thiourea and ethylenediamine as former polymers, wherein the citric acid provides a carbon source, the ethylenediamine provides a nitrogen source, the boracic acid provides a boron source, and the thiourea provides a sulphur source to prepare N,B,S-CDs. The preparation method has a simple preparation technology, and the prepared fluorescent doped carbon nanometer material has strong fluorescence, excellent stability and good water solubility. Under the irradiation of visible light, the prepared fluorescent doped carbon nanometer material exhibits excellent photocatalytic degradation capability of Rhodamine B (short for RhB), the degradation rate of the prepared fluorescent doped carbon nanometer material is as high as 98.5%, and therefore, the prepared fluorescent doped carbon nanometer material has good application prospects in the fields, such as environment repair, sewage treatment, separation science and the like.

Description

technical field [0001] The invention belongs to the field of biochemical analysis, in particular to a novel fluorescent-doped carbon nanometer photocatalyst, a preparation method thereof and an application in photocatalytic degradation of rhodamine B (abbreviated as RhB). Background technique [0002] Carbon dots (CDs), as a new member of the carbon nanomaterials family, are carbon nanoparticles with diameters less than 10 nm, usually composed of SP 2 It is composed of hybridized carbon atoms, oxygen- and hydrogen-rich substances. As a new type of fluorescent carbon nanomaterial, carbon dots have special fluorescent properties, such as adjustable excitation and emission wavelengths, good photostability, and no light flickering phenomenon. Compared with traditional organic fluorescent dyes and metal quantum dots, CDs, It has many advantages, and its unique luminescent properties and biocompatibility have good application prospects in the fields of photocatalysis, luminescent...

Claims

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Application Information

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IPC IPC(8): B01J27/24B82Y30/00B82Y40/00C02F1/30C02F101/38
CPCB82Y30/00B82Y40/00C02F1/30B01J27/24C02F2101/38C02F2305/10C02F2305/08B01J35/40B01J35/39Y02W10/37
Inventor 薛茗月湛志华
Owner GUILIN NORMAL COLLEGE
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