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Preparation method and application of SnO2 hollow nanospheres of different sizes

A hollow nano-sized technology, applied in the field of nano-materials, can solve the problems of time-consuming and cumbersome processes, and achieve the effects of reducing the number of washings, drying quickly, and increasing the yield and morphological yield

Inactive Publication Date: 2019-03-12
HENAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Currently, SnO 2 Hollow nanosphere materials are mostly prepared by using the hard template method, which is divided into three steps: the first step is to obtain carbon microspheres by hydrothermal carbonization; the second step is to use carbon microspheres as a hard template to obtain tin dioxide Coating carbon core-shell nanospheres; the third step is to use high-temperature calcination to remove carbon microspheres to obtain SnO 2 Hollow nanospheres; SnO prepared by this three-step method 2 The process of hollow nanospheres is too cumbersome and time-consuming

Method used

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  • Preparation method and application of SnO2 hollow nanospheres of different sizes
  • Preparation method and application of SnO2 hollow nanospheres of different sizes
  • Preparation method and application of SnO2 hollow nanospheres of different sizes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 0.182gK 2 SnO 3 ·3H 2 O and 0.24g of urea were dissolved in 40ml of ultrapure water, then transferred to a 50ml polytetrafluoroethylene lining, and the polytetrafluoroethylene lining was installed in the autoclave, and the autoclave was sealed to adjust The temperature is at 190°C, heated for 15 hours, cooled naturally, the product obtained is washed with water and absolute ethanol for 6 times in sequence, and then dried under vacuum at 50°C.

[0036] The product obtained in Example 1 is characterized, and the results are as follows figure 1 , figure 2 as shown, figure 1 SnO prepared for this example 2 Scanning electron micrograph of hollow nanospheres, figure 2 SnO prepared for this embodiment 2 TEM image of hollow nanospheres. Transmission electron microscope test shows that the SnO prepared by this embodiment 2 The hollow nanospheres have a diameter of 6.8 nm.

Embodiment 2

[0038] 0.182g K 2 SnO 3 ·3H 2 O and 0.24 g of urea were dissolved in a mixed solution made of 5 ml of absolute ethanol and 35 ml of ultrapure water, and then transferred to a 50 ml polytetrafluoroethylene lining, and the polytetrafluoroethylene lining was placed on In the high-pressure reaction kettle, seal the high-pressure reaction kettle and adjust its temperature at 190°C, heat for 15h, and cool naturally. The obtained product is washed with water and absolute ethanol for 6 times, and then vacuum-dried at 50°C to obtain SnO with a diameter of 8.1nm. 2 nano hollow spheres.

Embodiment 3

[0040] 0.182g K 2 SnO 3 ·3H 2 O and 0.24g of urea were respectively dissolved in a mixed solution made of 10ml of absolute ethanol and 30ml of ultrapure water, and then transferred to a 50ml polytetrafluoroethylene lining, and the polytetrafluoroethylene lining was placed in a high-pressure In the reaction kettle, seal the autoclave and adjust its temperature at 190°C, heat for 15h, and cool naturally. The obtained product is washed with water and absolute ethanol for 6 times in turn, and then vacuum-dried at 50°C to obtain SnO with a diameter of 11.3nm. 2 nano hollow spheres.

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Abstract

The invention relates to a preparation method and application of SnO2 hollow nanospheres of different sizes. The preparation method comprises the following steps of: respectively dissolving K2SnO3.3H2O and urea in a mixture of ultrapure water and ethyl alcohol; then, transferring the obtained product to a polytetrafluoroethylene lining; loading in a high-pressure reaction kettle; heating a sealingcontainer, and naturally cooling; respectively washing the obtained sample with water and ethyl alcohol, and carrying out vacuum drying to obtain white SnO2 hollow nanospheres. The method does not need carbon microspheres as a hard template, and provides a preparation method for the SnO2 hollow nanospheres of different sizes, and the preparation method has the advantages of low cost, simple technical process, time saving, convenience, safety, high product purity and easiness in control and is suitable for industrial production. The SnO2 hollow nanospheres prepared by using the method can be used as three-order nonlinear optic materials.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and relates to a preparation method of nanomaterials, in particular to a kind of SnO with different sizes 2 Preparation method of hollow nanospheres. Background technique [0002] SnO 2 It is an n-type semiconductor material. Has a wide bandgap (3.6eV), and SnO 2 Nanomaterials are widely used in the fields of lithium-ion batteries, gas sensors, catalysts, optoelectronic devices and laser technology. Nano-scale hollow spheres have low density, high specific surface area, and good permeability, which greatly improve the gas-sensing properties and electrochemical activity of tin dioxide, which has attracted widespread attention. [0003] Currently, SnO 2 Hollow nanosphere materials are mostly prepared by using the hard template method, which is divided into three steps: the first step is to obtain carbon microspheres by hydrothermal carbonization; the second step is to use carbon microsph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G19/02B82Y40/00G02F1/355
CPCB82Y40/00C01G19/02C01P2004/03C01P2004/04C01P2004/34C01P2004/62C01P2004/64G02F1/3556
Inventor 朱宝华王桂霞张智豪顾玉宗
Owner HENAN UNIVERSITY
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