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Nano SnO2 hollow microsphere, preparation method and applications thereof

A nano and microsphere technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of long preparation cycle and heat treatment time, and environmental pollution, so as to improve photocatalytic performance , to achieve large-scale production, the effect of structural stability

Active Publication Date: 2016-08-03
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, Chinese patent CN101012067A (publication number) proposes a kind of impregnation-calcination method to prepare nano SnO 2 The method of hollow sphere, its preparation period and heat treatment time are longer; 2 The preparation method of nanomaterials needs to use chemical corrosion to remove a large number of templates, which will cause environmental pollution

Method used

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  • Nano SnO2 hollow microsphere, preparation method and applications thereof
  • Nano SnO2 hollow microsphere, preparation method and applications thereof
  • Nano SnO2 hollow microsphere, preparation method and applications thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Get 1.752g tin chloride pentahydrate (SnCl 4 ·5H 2 O) and 1.712g sucrose (C 12 h 22 o 11 ) into 10 mL of deionized water, and stirred in a water bath at a constant temperature of 65°C for 20 min to fully dissolve the solid and volatilize the hydrogen chloride dissolved in the tin chloride. Pour the obtained mixed solution into the capacity cup of the polytetrafluoroethylene reaction kettle matched with the microwave digestion instrument, and carry out the microwave-assisted hydrothermal reaction. The filling degree is 60-80%, and the reaction conditions are set at 190° C. for 1 hour. After the reaction was completed and the reactor was naturally cooled, the precipitated part of the product was separated by a centrifuge, and washed three times with absolute ethanol and deionized water until the washing liquid was clear and transparent. Put the obtained product into a vacuum drying oven, and dry it at 70°C for 2 hours; after the product is cooled, put the product into...

Embodiment 2

[0048] Get the 1.495g potassium stannate (K 2 SnO 3 ·3H 2 O) and 1.712g sucrose (C 12 h 22 o 11 ) into 10 mL of deionized water, and stirred at a constant temperature of 65°C for 20 min to fully dissolve the solid and volatilize the hydrogen chloride dissolved in the tin chloride. The obtained mixed solution was then transferred to a capacity cup of a polytetrafluoroethylene reactor for microwave-assisted hydrothermal reaction under the reaction conditions of 160° C. for 1.5 h. After the reaction was completed and cooled naturally, the product was separated by a centrifuge to separate the precipitated part, and washed three times with absolute ethanol and deionized water until the washing liquid was clear and transparent. Put the obtained product into a vacuum drying oven and dry it at 70°C for 2 hours. After the product is cooled, put the product into a horse boiling furnace for calcination. The calcination condition is 650°C for 1 hour to obtain the product nano SnO 2 ...

Embodiment 3

[0050] Get the 1.495g potassium stannate (K 2 SnO 3 ·3H 2 O) and 1.712g sucrose (C 12 h 22 o 11 ) into 10 mL of deionized water, and stirred at a constant temperature of 65°C for 20 min to fully dissolve the solid and volatilize the hydrogen chloride dissolved in the tin chloride. The obtained mixed solution was then transferred to a capacity cup of a polytetrafluoroethylene reactor for microwave-assisted hydrothermal reaction under the reaction conditions of 220° C. for 0.5 h. After the reaction was completed and cooled naturally, the product was separated by a centrifuge to separate the precipitated part, and washed three times with absolute ethanol and deionized water until the washing liquid was clear and transparent. Put the obtained product into a vacuum drying oven and dry it at 70°C for 2 hours. After the product is cooled, put the product into a horse boiling furnace for calcination. The calcination condition is 450°C for 2.5 hours to obtain the product nano SnO ...

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Abstract

The invention discloses a nano SnO2 hollow microsphere, a preparation method and applications thereof, and belongs to the technical field of inorganic chemistry and material preparation. The preparation method comprises the following steps: dissolving a tin source and a sugar source into water according to a mole ratio of 1:1-3, carrying out hydrothermal reactions under the assistance of microwaves, subjecting the reaction products to centrifugation and washing, drying, and burning the solids to obtain nano SnO2 hollow microspheres. The nano SnO2 hollow microsphere has the characteristics of low density, high specific surface area, stable structure, and surface permeability, and can be used a photocatalyst for preparing an oxygen indictor. The hollow microsphere can be mixed with an electron donor, an oxidation-reduction dye, and a polymer binding material, and then the mixture is dispersed under ultrasonic waves to prepare the oxygen indictor. The preparation method of nano SnO2 hollow microsphere has the advantages of simpleness, practicality, low cost, environment-friendliness, and good using effect. The prepared nano SnO2 hollow microsphere can be used to prepare an oxygen indictor to indicating oxygen state in packages of food and medicine so as to evaluate the freshness.

Description

technical field [0001] The invention belongs to the technical field of inorganic chemistry and material preparation, in particular to a nano SnO 2 Hollow microsphere and its preparation method and application. Background technique [0002] Since the 21st century, my country's packaging industry has become one of the largest packaging countries in the world, but it is still in the predicament of low technology. In view of China's packaging market has a huge development space and the status quo of low-tech difficulties, intelligent packaging technology and current nanotechnology have become key technologies for the development of the packaging industry. The application of nanomaterials to modified atmosphere packaging in the field of food packaging and the use of oxygen-sensitive smart ink technology can meet the increasing living needs of consumers and solve food safety issues that have attracted much attention. Oxygen indicator is one of the important components of intelli...

Claims

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Application Information

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IPC IPC(8): C01G19/02B82Y30/00B82Y40/00
CPCC01G19/02C01P2002/72C01P2002/84C01P2004/03C01P2004/04C01P2004/34C01P2004/50C01P2004/62C01P2004/64
Inventor 刘兴海詹沾杨文妮周立宝黎厚斌黄驰
Owner WUHAN UNIV
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