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Preparation method for zinc oxide/stannic oxide composite microsphere

A technology of tin dioxide and composite microspheres, applied in the directions of zinc oxide/zinc hydroxide, microsphere preparation, tin oxide, etc., can solve the problems of poor selectivity, lack of synthesis methods, etc., and achieve easy components and sizes, and simple methods. , the effect of uniform particle size distribution

Inactive Publication Date: 2014-02-12
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, ZnO or SnO with various morphologies 2 Nanostructures such as nanobelts, nanowires, nanorods, nanotubes, and self-assembled microspheres have been reported in the literature, and have been well applied in the fields of photocatalysis, solar cells, and gas sensors. However, in the field of gas sensors In the application, there is generally the problem of poor selectivity. Studies have shown that SnO 2 The sensor of the -ZnO composite system has good selectivity to ethanol (Hemmati, S., A. Anaraki Firooz, et al. (2011). "Nanostructured SnO 2 –ZnO sensors: Highly sensitive and selective to ethanol." Sensors and Actuators B: Chemical 160(1): 1298-1303), but currently ZnO-SnO 2 Composite system synthesis methods are relatively scarce. The present invention adopts the soft film plate method and uses block polymer micelles as templates to synthesize ZnO-SnO with uniform particle size through the ordered structure of the template mesoscopic size. 2 Composite microspheres provide a material basis for improving the selectivity and sensitivity of gas sensors and improving the photocatalytic activity of metal oxides

Method used

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  • Preparation method for zinc oxide/stannic oxide composite microsphere
  • Preparation method for zinc oxide/stannic oxide composite microsphere
  • Preparation method for zinc oxide/stannic oxide composite microsphere

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] ZnO / SnO 2 Preparation of composite precursor solution:

[0025] Weigh 2.1 g of triblock copolymer polyoxyethylene-polyoxypropylene-polyoxyethylene (P123), dissolve the block polymer in absolute ethanol, stir, and after P123 is completely dissolved, add 0.2 g of stannous chloride water, stirred at room temperature for 3 hours; then weighed 0.9 g of zinc acetate dihydrate, stirred at room temperature for 3 hours.

[0026] ZnO / SnO 2 Preparation of composite microspheres:

[0027] The prepared ZnO / SnO 2 The composite precursor solution was placed in a polytetrafluoroethylene autoclave, reacted at 180°C for 24 hours, and cooled naturally to room temperature. Filtered, washed with absolute ethanol and deionized water several times, dried at 60 °C, and fully ground to obtain the final product ZnO / SnO 2 Composite microspheres.

Embodiment 2

[0029] ZnO / SnO 2 Preparation of composite precursor solution:

[0030] Weigh 2.1 g of triblock copolymer polyoxyethylene-polyoxypropylene-polyoxyethylene (P123), dissolve the block polymer in absolute ethanol, stir, and after P123 is completely dissolved, add 0.2 g of stannous chloride water, stirred at room temperature for 3 hours; then weighed 0.9 g of zinc acetate dihydrate, stirred at room temperature for 3 hours.

[0031] ZnO / SnO 2 Preparation of composite microspheres:

[0032] The prepared ZnO / SnO 2 The composite precursor solution was placed in a polytetrafluoroethylene autoclave, reacted at 200°C for 24 hours, and cooled naturally to room temperature. Filtered, washed with absolute ethanol and deionized water several times, dried at 60 °C, and fully ground to obtain the final product ZnO / SnO 2 Composite microspheres.

Embodiment 3

[0034] ZnO / SnO 2 Preparation of composite precursor solution:

[0035] Weigh 2.1 g of triblock copolymer polyoxyethylene-polyoxypropylene-polyoxyethylene (P123), dissolve the block polymer in absolute ethanol, stir, and after P123 is completely dissolved, add 0.1 g of stannous chloride water, stirred at room temperature for 3 hours; then weighed 0.45 g of zinc acetate dihydrate, stirred at room temperature for 3 hours.

[0036] ZnO / SnO 2 Preparation of composite microspheres:

[0037] The prepared ZnO / SnO 2 The composite precursor solution was placed in a polytetrafluoroethylene autoclave, reacted at 120°C for 24 hours, and cooled naturally to room temperature. Filtered, washed with absolute ethanol and deionized water several times, dried at 80 °C, and fully ground to obtain the final product ZnO / SnO 2 Composite microspheres.

[0038] Example 3:

[0039] ZnO / SnO 2 Preparation of composite precursor solution:

[0040] Weigh 2.1 g of triblock copolymer polyoxyethylene-...

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Abstract

The invention discloses a preparation method for a zinc oxide / stannic oxide composite microsphere. According to the method, a wet chemistry method is utilized; a block polymer is used as a template in an organic solvent; a water-soluble zinc salt and a stannum salt are used as precursors; the size of particles is controlled through an ordered composition of the template in the mesoscopic size, and through hydrophilic characteristic, lipophilic characteristic, and the like; and a metal oxide microsphere is obtained by removing the template. The method has advantages of simple technology, low cost, and easily controllable and adjustable size, components, and other characteristics of the microsphere. The zinc oxide / stannic oxide composite microsphere prepared by the method can be used for photocatalysis and hydrolysis of water or polymers, solar cell light anodes, gas-sensitive sensors, and the like.

Description

technical field [0001] The invention relates to a method for preparing metal oxide composite microspheres, in particular to a method for preparing zinc oxide / tin dioxide composite microspheres by using a wet chemical method. Background technique [0002] Metal oxides such as ZnO, SnO 2 Equal wide bandgap materials have unique optical, optoelectronic and gas-sensing properties, and are widely used in solar cells, gas-sensing elements, transparent conductive films, lithium storage materials and other fields. Nano metal oxide microspheres (such as ZnO, SnO 2 etc.) Due to its small particle size and large specific surface area, it has excellent macroscopic properties such as electricity, magnetism, light, mechanics, and chemistry. As a traditional functional material, it is widely used in gas-sensitive materials, photonic materials, ceramics, coatings, and catalytic materials. and many other fields. So far, ZnO or SnO with various morphologies 2 Nanostructures such as nanobe...

Claims

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Application Information

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IPC IPC(8): B01J13/02C01G19/02C01G9/02
Inventor 葛美英汪元元姜来新尹桂林何丹农
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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