Method for environment-friendly preparation of fluorescent silicon nanoparticles

A silicon nanoparticle, fluorescence technology, applied in nanotechnology, nano-optics, nanotechnology and other directions, to achieve the effect of cheap raw materials, low toxicity and safe operation

Active Publication Date: 2015-04-29
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, there is no report on the method of using this cheap and environmentally friendly natural material to prepare fluorescent silicon nanoparticles.

Method used

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  • Method for environment-friendly preparation of fluorescent silicon nanoparticles
  • Method for environment-friendly preparation of fluorescent silicon nanoparticles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Pretreatment with acid

[0021] The rice hulls washed with deionized water were heated under reflux in a 10 wt% hydrochloric acid water bath for 3 h.

[0022] (2) Preparation of silica samples

[0023] Put the treated rice husk in a porcelain crucible and heat it with an alcohol lamp until it turns off-white.

[0024] (3) Preparation of fluorescent silicon nanoparticles by microwave irradiation

[0025] Take 0.04g of silicon dioxide sample, add 10mL of 0.5mol / L NaOH solution, place it in a glass tube dedicated to microwave radiation for microwave radiation, and obtain fluorescent silicon nanoparticles.

[0026] Microwave radiation conditions are: microwave power 600W; temperature: 100°C; time: 2h.

Embodiment 2

[0028] (1) Pretreatment with acid

[0029] The wheat stalks washed with deionized water were heated under reflux in a 10 wt% hydrochloric acid water bath for 3 h.

[0030] (2) Preparation of silica samples

[0031] Put the treated wheat stalks in a porcelain crucible and heat them with an alcohol lamp until they turn off-white.

[0032] (3) Preparation of fluorescent silicon nanoparticles by microwave irradiation

[0033] Take 0.05g of silicon dioxide sample, add 10mL of 0.5mol / L KOH solution, place it in a glass tube dedicated to microwave radiation for microwave radiation, and obtain fluorescent silicon nanoparticles.

[0034] Microwave radiation conditions are: microwave power 600W; temperature: 110°C; time: 2.5h.

Embodiment 3

[0036] (1) Pretreatment with acid

[0037] The bagasse washed with deionized water was heated under reflux in a 20 wt% hydrochloric acid water bath for 2 h.

[0038] (2) Preparation of silica samples

[0039] Put the processed bagasse in a porcelain crucible and heat it with an alcohol lamp until it turns off-white.

[0040] (3) Preparation of fluorescent silicon nanoparticles by microwave irradiation

[0041] Take 0.03g of silicon dioxide sample, add 10mL of 0.6mol / L NaOH solution, place it in a glass tube dedicated to microwave radiation for microwave radiation, and obtain fluorescent silicon nanoparticles.

[0042] Microwave radiation conditions are: microwave power 600W; temperature: 130°C; time: 3h.

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Abstract

The invention discloses a method for environment-friendly preparation of fluorescent silicon nanoparticles. The method comprises the following steps: cutting a plant with high silicon content into pieces, cleaning with deionized water, adding into acid liquor, and heating in a water bath; washing a sample subjected to acid treatment to be neutral by using deionized water, putting the sample into a crucible, and heating until the sample becomes white powder; and adding the white powder into an alkali solution, and performing microwave radiation heating to obtain the fluorescent silicon nanoparticles. The method for environment-friendly preparation of the fluorescent silicon nanoparticles is completely implemented in a water phase, is cheap in raw material, is environmentally friendly, is safe in operation, is quick, simple and convenient, and is small in toxicity, and the obtained fluorescent silicon nanoparticles have very good monodispersity and fluorescent property, are high in quantum yield, good in storage stability and good in water solubility, and can be widely applied to various optical correlation fields as a fluorescent marker.

Description

technical field [0001] The invention belongs to the technical field of silicon nanometer materials, and relates to a method for preparing fluorescent silicon nanometer particles, in particular to a green method for preparing fluorescent silicon nanometer particles from plants with high silicon content. Background technique [0002] Functionalized silicon nanomaterials have unique properties such as good optical / electrical / mechanical properties, surface modification and good compatibility, so people have a strong interest in functionalized silicon nanomaterials (see: Pavesi , L.; Negro, L.D.; Mazzoleni, C.; Franzo, G.; Priolo, F. Nature 2000, 408, 440-444. Ding, Z.F.; Quinn, B.M.; Haram, S.K.; Pell, L.E.; , A.J.Science 2002, 296, 1293-1297.Ma, D.D.D.; Lee, C.S.; Au, F.C.K.; G.H.; Fang, Y.; Greytak, A.B.; Zheng, G.F.; Lieber, C.M. Science 2006, 313, 1100-1104.). Typical fluorescent silicon nanoparticles are very representative zero-dimensional silicon nanomaterials, which ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/59B82Y40/00B82Y20/00
Inventor 何耀吴彦燕钟旖菱
Owner SUZHOU UNIV
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