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Template-free synthesis method of eggshell-shaped silicon dioxide nanomaterial

A technology of silicon dioxide and nanomaterials, applied in the direction of silicon dioxide and silicon oxide, which can solve problems such as low efficiency and cumbersome steps

Active Publication Date: 2021-04-20
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Technical problem to be solved: Aiming at the above-mentioned existing technical problems such as the need for multi-step reactions, relatively cumbersome steps, and low efficiency, in order to solve this problem, the invention protects a template-free synthesis of eggshell-shaped silica nanomaterials method, which only needs to calcinate the product of the disproportionation reaction of small molecule silane in the presence of amine at a certain temperature to form hollow eggshell nano-SiO 2

Method used

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  • Template-free synthesis method of eggshell-shaped silicon dioxide nanomaterial
  • Template-free synthesis method of eggshell-shaped silicon dioxide nanomaterial
  • Template-free synthesis method of eggshell-shaped silicon dioxide nanomaterial

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Embodiment 1

[0025] A template-free synthesis method of eggshell-shaped silica nanomaterials, the synthesis steps are as follows:

[0026] The first step: the HSiCl 3 and tri-n-propylamine in a molar ratio of 1:2 (volumes less than 2ml respectively) were added to 20ml of dichloromethane.

[0027] Step 2: After stirring at room temperature for 5 hours, spin the yellow solution to dryness, place the remaining yellow viscous substance in a crucible, and calcinate it in a muffle furnace at 700°C for 3 hours to obtain eggshell-shaped hollow nano-SiO 2 .

[0028] Such as figure 2 The obtained eggshell SiO 2 XRD pattern, it can be seen that the product is relatively pure SiO 2 ,Depend on image 3 The elemental distribution diagram shown can further see that the elemental composition of the product is Si and O.

Embodiment 2

[0030] A template-free synthesis method of eggshell-shaped silica nanomaterials, the synthesis steps are as follows:

[0031] Step 1: Si 2 Cl 6 and tri-n-propylamine were added to 20 ml of dichloromethane at a molar ratio of 1:2 (the volumes were less than 2 ml).

[0032] Step 2: After stirring at room temperature for 5 hours, the stirring speed is 500-1000r / min, and the yellow solution is spin-dried at a spin-drying temperature of 20-70°C. Calcined in a furnace at 700°C for 3 hours to obtain eggshell-shaped hollow nano-SiO 2 .

Embodiment 3

[0034] A template-free synthesis method of eggshell-shaped silica nanomaterials, the synthesis steps are as follows:

[0035] The first step: the HSiCl 3 and tri-n-propylamine in a molar ratio of 1:2 (volumes less than 2ml respectively) were added to 20 ml of an oxygen-free organic solvent, such as benzene, toluene, chloroform or acetonitrile.

[0036] Step 2: After stirring at room temperature for 5 hours, the stirring speed is 500-1000r / min, and the yellow solution is spin-dried at a spin-drying temperature of 20-70°C. Calcined in a furnace at 700°C for 3 hours to obtain eggshell-shaped hollow nano-SiO 2 .

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Abstract

The invention discloses a template-free synthesis method of an eggshell-shaped silicon dioxide nanomaterial, belonging to the field of functional materials. The method comprises the following steps: dissolving a certain amount of HSiCl3 and tri-n-propylamine in CH2Cl2, and conducting stirring at room temperature for several hours; and evaporating a formed yellow solution to dryness, and calcining a remaining product in a muffle furnace to obtain eggshell-shaped SiO2. The invention aims to provide a rapid preparation method of hollow eggshell-shaped nanometer SiO2. According to the method, the hollow eggshell-shaped nanometer SiO2 can be formed only by calcining a product of a disproportionation reaction of small molecular silane in the presence of amine at a certain temperature. The method has the advantages of quickness and easiness in amplified synthesis, and is expected to be used for industrially preparing the hollow SiO2 nanomaterial.

Description

technical field [0001] The invention belongs to the field of functional materials, and in particular relates to a template-free synthesis method of an eggshell-shaped silicon dioxide nanometer material. Background technique [0002] Nano silicon dioxide (SiO 2 ) is widely used, such as in electronic packaging materials, coatings, rubber, ceramics, drug carriers, cosmetics, and lithium battery negative electrode materials. SiO with a hollow structure 2 It has a large specific surface area, porous structure and super adsorption capacity. In terms of substance release and cancer treatment, its internal hollow structure can carry more drugs. In addition, the huge hollow structure can be combined with different types of functional inorganic nanomaterials and environment-responsive hydrogels to prepare multifunctional composite nano drug carriers, so as to better realize drug targeting, intelligent release and Monitoring of the release process. hollow structure SiO 2 Materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/18
Inventor 孙林刘宴秀邵荣吴俊
Owner YANCHENG INST OF TECH
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