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Fluorescent silicon dioxide-CTAB (Cetyl Trimethyl Ammonium Bromide) composite nanomaterial and preparation process thereof

A composite nanomaterial, -CTAB technology, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of rare earth materials environmental hazards, expensive precious metals, limited large-scale application, etc., to facilitate large-scale industrial production and low cost. , the effect of short preparation cycle

Inactive Publication Date: 2019-05-17
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the toxicity of the rare earth material itself, and the rare earth is a scarce resource, its large-scale application is limited.
[0008] The above-mentioned fluorescent materials have some serious problems, such as organic molecular dyes are easy to quench, most semiconductor quantum dots, and rare earth materials themselves are toxic and may cause harm to the environment, and precious metals are expensive, etc., which limit their further applications.

Method used

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  • Fluorescent silicon dioxide-CTAB (Cetyl Trimethyl Ammonium Bromide) composite nanomaterial and preparation process thereof
  • Fluorescent silicon dioxide-CTAB (Cetyl Trimethyl Ammonium Bromide) composite nanomaterial and preparation process thereof
  • Fluorescent silicon dioxide-CTAB (Cetyl Trimethyl Ammonium Bromide) composite nanomaterial and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] In this embodiment, a preparation process of fluorescent silica-CTAB composite nanomaterials includes:

[0033] Dissolve 2g of CTAB in a mixed solvent of 240mL of deionized water and 0.577mL of triethylamine, place it in a water bath at 80°C and stir for 30 minutes to completely dissolve the CTAB, then add 1.637mL of methyl orthosilicate, and continue to dissolve in a water bath at 80°C After stirring in medium for 2 hours, place in an oven at 100° C. to completely evaporate the solvent to obtain fluorescent silica-CTAB composite nanomaterials.

[0034] The fluorescent silica-CTAB composite nanomaterial in this embodiment is composed of silica and CTAB, and the mass ratio of silica and CTAB is 0.66:2.

[0035] CTAB in the fluorescent silica-CTAB composite nanomaterial obtained in Example 1 was removed by an acetone extraction method to obtain a nanomaterial after removal of CTAB.

Embodiment 2

[0037] In this embodiment, a preparation process of fluorescent silica-CTAB composite nanomaterials includes:

[0038] Dissolve 3.35g of CTAB in a mixed solvent of 240mL of deionized water and 0.577mL of triethylamine, place it in a water bath at 80°C and stir for 30 minutes to completely dissolve CTAB, then add 2.56mL of methyl orthosilicate, and continue to dissolve in a water bath at 80°C After stirring in the pot for 2 hours, place in an oven at 100° C. to completely evaporate the solvent to obtain fluorescent silica-CTAB composite nanomaterials.

[0039] The fluorescent silica-CTAB composite nanomaterial in this embodiment is composed of silica and CTAB, and the mass ratio of silica and CTAB is 1.032:3.35.

Embodiment 3

[0041] In this embodiment, a preparation process of fluorescent silica-CTAB composite nanomaterials includes:

[0042] Dissolve 2g of CTAB in a mixed solvent of 240mL of deionized water and 0.577mL of triethylamine, place it in a water bath at 80°C and stir for 30 minutes to completely dissolve the CTAB, then add 2.56mL of methyl orthosilicate, and continue to dissolve in a water bath at 80°C After stirring in medium for 2 hours, place in an oven at 100° C. to completely evaporate the solvent to obtain fluorescent silica-CTAB composite nanomaterials.

[0043] The fluorescent silica-CTAB composite nanomaterial in this example is composed of silica and CTAB, and the mass ratio of silica and CTAB is 1.032:2.

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Abstract

The invention discloses a fluorescent silicon dioxide-CTAB (Cetyl Trimethyl Ammonium Bromide) composite nanomaterial and a preparation process thereof and belongs to the technical field of preparationof nanomaterials. The composite nanomaterial is composed of silicon dioxide and CTAB, wherein the mass ratio of silicon dioxide to CTAB is (0.66-1.032) to (2-3.35). The invention provides the fluorescent silicon dioxide-CTAB composite nanomaterial; the composite nanoaterial has obvious emission spectrum in 400-750 nm under irradiation of 365 nm ultraviolet light, and has microsecond-stage fluorescent lifetime and very strong fluorescent stability; the fluorescent property of the composite nanomaterial still remains stable even if the composite nanomaterial is placed in natural environment for12 months and is continuously irradiated for 24 h under 365 nm ultraviolet light; The invention provides the preparation process of the fluorescent silicon dioxide-CTAB composite nanomaterial; and the process is good in repeatability, short in preparation period and low in cost, and is convenient to popularize as large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a fluorescent silicon dioxide-CTAB composite nanomaterial and a preparation process thereof. Background technique [0002] Fluorescent materials are widely used in coatings, fluorescent lamps, anti-counterfeiting, optoelectronic devices, medical imaging and treatment because of their special optical properties. Fluorescent materials affect the quality of people's lives and are of great significance to the promotion of human society and economic development. At present, although a variety of fluorescent materials have been developed, such as organic molecular dyes, semiconductor quantum dots, noble metals, rare earth materials, etc. [0003] Patent CN 106928259 B discloses a cyan fluorescent material and its preparation process. The cyan fluorescent material is a cadmium 5-nitroorotate complex with a certain spatial structure. The preparation process ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/59C09K11/06
Inventor 何勇菊
Owner CENT SOUTH UNIV