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Preparation method of zinc oxide-silver oxide hybrid on surface of nanosphere

A nano-zinc oxide, nano-sphere technology, applied in chemical instruments and methods, catalyst activation/preparation, organic compound/hydride/coordination complex catalyst, etc., can solve the adverse effects of elemental silver photocorrosion, catalysis and luminescence performance and other problems, to achieve the effects of many repeated uses, large adsorption capacity, and fast photocatalytic degradation rate.

Active Publication Date: 2020-10-30
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, pure ZnO crystals have point defects, which adversely affect their catalytic and luminescent properties.
[0004]Ag2O has a bandgap energy of 1.46eV, which has strong light absorption in visible optical drives, but it is easy to The production of elemental silver produces the so-called photocorrosion phenomenon

Method used

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  • Preparation method of zinc oxide-silver oxide hybrid on surface of nanosphere
  • Preparation method of zinc oxide-silver oxide hybrid on surface of nanosphere
  • Preparation method of zinc oxide-silver oxide hybrid on surface of nanosphere

Examples

Experimental program
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Effect test

Embodiment 1

[0031] (1) Synthesis and modification of nano-zinc oxide colloids and preparation of Pickering nanospheres:

[0032] At room temperature, with 10 grams of 2% mass concentration of zinc acetate in absolute ethanol; dropwise into 10 grams of 0.6% mass concentration of lithium hydroxide in absolute ethanol at a rate of 0.1 g / min, then at high speed Crush under the shearing machine for a certain period of time. 20,000 rpm, the fixed time of crushing is 5 minutes, and the temperature of the mixed solution is controlled at 0°C; add methacryloxypropyl trimethoxysilane dropwise, the addition amount is 0.1 g, and the dropping speed is 0.1 g / min; The crushing time is 2 minutes, and the temperature is 60°C. After cooling, 20.1 grams of modified nano-zinc oxide colloid can be obtained.

[0033] (2) Preparation of Pickering nanospheres:

[0034] At room temperature, add 1 gram of N-isopropylacrylamide and 0.5 gram of sodium acrylate mixed monomer to 10 grams of water to form an aqueous ...

Embodiment 2

[0043] (1) Synthesis and modification of nano zinc oxide colloid:

[0044] At room temperature, with 10 grams of 2% mass concentration of zinc acetate in absolute ethanol; dropwise into 10 grams of 0.6% mass concentration of lithium hydroxide in absolute ethanol at a rate of 0.1 g / min, then at high speed Crush under the shearing machine for a certain period of time. 20,000 rpm, the fixed time of crushing is 5 minutes, and the temperature of the mixed solution is controlled at 0°C; add methacryloxypropyl trimethoxysilane dropwise, the addition amount is 0.1 g, and the dropping speed is 0.1 g / min; The crushing time is 2 minutes, and the temperature is 60°C. After cooling, 20.1 grams of modified nano-zinc oxide colloid can be obtained.

[0045] (2) Preparation of Pickering nanospheres:

[0046] At room temperature, add 1 gram of N-isopropylacrylamide and 0.1 gram of sodium acrylate mixed monomer to 10 grams of water to form an aqueous solution, mix 50 grams of C4 solvent, and ...

Embodiment 3

[0054] (1) Synthesis and modification of nano zinc oxide colloid:

[0055] At room temperature, with 10 grams of 2% mass concentration of zinc acetate in absolute ethanol; dropwise into 10 grams of 0.6% mass concentration of lithium hydroxide in absolute ethanol at a rate of 0.1 g / min, then at high speed Crush under the shearing machine for a certain period of time. 20,000 rpm, the fixed time for the initial crushing is 5 minutes, and the temperature of the mixed liquid is controlled at 0°C; add methacryloxypropyltrimethoxysilane dropwise, the addition amount is 0.1 g, and the dropping speed is 0.1 g / min; The secondary pulverization time is 2 minutes, and the temperature is 60°C. After cooling, 20.1 grams of modified nano-zinc oxide colloid can be obtained.

[0056] (2) Preparation of Pickering nanospheres:

[0057] At room temperature, add 1 gram of N-isopropylacrylamide and 0.4 gram of sodium acrylate mixed monomer to 10 grams of water to form an aqueous solution, mix 50 ...

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Abstract

The invention relates to the fields of colloids, semiconductors, photocatalysis, the photovoltaic industry and the like, in particular to a preparation method of a zinc oxide-silver oxide hybrid on the surface of a nanosphere. According to the invention, a ZnO nanosphere synthesized by a Pickering inverse miniemulsion polymerization method is used as a solid emulsifier; poly(N-isopropylacrylamide), sodium polyacrylate and double bonds in a modifier form a micro-crosslinked copolymer sphere liner layer, and ZnO is attached to the outer side of the liner layer to form an outer layer, so copolymer nanosphere colloid is prepared and serves as an adsorption surface layer; and the copolymer nanosphere colloid is adsorbed and further precipitated on a surface layer to form a Ag2O / ZnO hybrid material. The nanoscale hybrid prepared by the method has potential application prospects in the fields of semiconductors, photocatalytic degradation, the photovoltaic industry and the like.

Description

technical field [0001] The present invention relates to the fields such as colloid, semiconductor, photocatalysis and photovoltaic industry, particularly relates to adopting zinc oxide (ZnO) as the Pickering nanosphere surface adsorption and precipitation of solid emulsifier to prepare silver oxide (Ag 2 O) Hybrid approach. Background technique [0002] The principle of catalysis is based on the redox ability of photocatalysts under the condition of light, so that the purpose of purifying pollutants, material synthesis and transformation can be achieved. Typically, photocatalytic oxidation uses semiconductors as catalysts and light as energy to degrade organic matter into carbon dioxide and water. Therefore, photocatalytic technology, as an efficient and safe environment-friendly environmental purification technology, has been recognized by the international academic community for the improvement of indoor air quality. [0003] ZnO has the characteristics of high energy de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/26B01J31/06B01J35/08B01J37/10B01J37/03B01F17/00C02F1/32C08F292/00C08F220/54C08F220/06C02F101/38C02F101/36C09K23/00
CPCB01J31/26B01J31/069B01J37/10B01J37/035C02F1/32C08F292/00C02F2305/10C02F2101/38C02F2101/40C02F2101/36C09K23/002B01J35/39B01J35/40B01J35/51C08F220/54C08F220/06
Inventor 刘芳张震乾林永周丁建宁
Owner CHANGZHOU UNIV