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Preparation method for gold-coated zinc oxide flower-like microspheres

A flower-shaped microsphere, zinc oxide technology, applied in the direction of zinc oxide/zinc hydroxide, nanotechnology, nanotechnology, etc., can solve the problem of lack of gold-coated zinc oxide flower-shaped microsphere preparation method, etc., to achieve good gas sensor performance and light. The effect of catalytic performance, large synthesis amount, and strong detection ability

Inactive Publication Date: 2015-05-13
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, there is a lack of a preparation method for gold-coated zinc oxide flower-like microspheres with high photocatalytic and gas-sensing properties

Method used

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  • Preparation method for gold-coated zinc oxide flower-like microspheres
  • Preparation method for gold-coated zinc oxide flower-like microspheres
  • Preparation method for gold-coated zinc oxide flower-like microspheres

Examples

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preparation example Construction

[0031] The invention provides a method for preparing gold-coated zinc oxide flower-shaped microspheres, comprising the following steps:

[0032] (1) Weigh Zn(CH 3 COOH) 2 2H 2 O powder, trisodium citrate dihydrate powder, and hexamethylenetetraammonium were dissolved in 100ml of deionized water, so that the molar ratio of the three substances was 10:1:10, and stirred for 0.5h;

[0033] (2) Put the mixed solution in a serum bottle, react at 90-100°C for 3-5h, then take out the serum bottle and cool it at room temperature;

[0034] (3) Alternately centrifuging the obtained precipitate with deionized water and absolute ethanol, and drying the product at 50-70° C. for 12 hours;

[0035] (4) Take out the dried product and anneal at 400°C for 30 minutes to obtain flower-shaped ZnO powder;

[0036] (5) Add ZnO powder to 100ml deionized water, then add 110ul of 1% HAuCl by mass 4 4H 2 O was added therein, and after heating for 15 minutes at 100-110°C in an oil bath, 3ml of triso...

Embodiment 1

[0040] The invention provides a method for preparing gold-coated zinc oxide flower-shaped microspheres, comprising the following steps:

[0041] (1) Weigh 0.01mol of Zn(CH 3 COOH) 2 2H 2 O powder 2.1951g, the purity is 99.99%, Sigma-Aldrich; 0.001mol trisodium citrate dihydrate powder 0.2941g, the purity is 99.99%, Sigma-Aldrich; 0.01mol hexamethylenetetramine 1.40186g, the purity is 99.99%, Sigma-Aldrich dissolved in 100ml deionized water, stirred for 0.5h;

[0042] (2) Put the mixed solution in a serum bottle, react at 90° C. for 3 hours, then take out the serum bottle and cool it at room temperature; the serum bottle is 200 ml.

[0043] (3) Alternately centrifuging the obtained precipitate with deionized water and absolute ethanol, and drying the obtained product at 50° C. for 12 hours;

[0044] (4) Take out the dried product and anneal at 400°C for 30 minutes to obtain flower-shaped ZnO powder;

[0045] (5) Add ZnO powder to 100ml deionized water, then add 110ul of 1%...

Embodiment 2

[0048] The invention provides a method for preparing gold-coated zinc oxide flower-shaped microspheres, comprising the following steps:

[0049] In step (1), weigh 13.1706g of Zn(CH 3 COOH) 2 2H 2 O powder, 1.7646g of trisodium citrate dihydrate powder, 8.4112g of hexamethylenetetraammonium dissolved in 100ml of deionized water, so that the molar ratio of the three substances is 10:1:10, stirred for 0.5h;

[0050] In step (2), the mixed solution is placed in a serum bottle, reacted at 95° C. for 4 hours, and then the serum bottle is taken out and cooled at room temperature;

[0051] In step (3), the obtained precipitate was alternately centrifuged with deionized water and absolute ethanol, and the obtained product was dried at 60° C. for 12 hours;

[0052] In step (5), ZnO powder was added to 100ml deionized water, followed by 110ul of 1% HAuCl 4 4H 2 O was added therein, after heating at 105° C. in an oil bath for 15 minutes, 3 ml of trisodium citrate dihydrate with a ma...

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Abstract

The invention discloses a preparation method for gold-coated zinc oxide flower-like microspheres. The preparation method comprises the following steps: (1) weighing Zn(CH3COOH)2.2H2O powder, trisodium citrate dihydrate powder and hexamethylenetetramine and dissolving in 100 ml of de-ionized water, wherein a molar ratio of Zn(CH3COOH)2.2H2O powder to trisodium citrate dihydrate powder to hexamethylenetetramine is 10 to 1 to 10; (2) putting a mixed solution into a serum bottle, reacting for 3-5 hours, taking out the serum bottle and cooling at a normal temperature; (3) performing centrifuging and cleaning on obtained precipitates and drying a product at 50-70 DEG C for 12 hours; (4) annealing at 400 DEG C for 30 minutes to obtain flower-like ZnO powder; (5) adding the ZnO powder into the de-ionized water, adding HAuCl4.4H2O, adding trisodium citrate dihydrate, and reacting; (6) performing centrifugation and cleaning on obtained precipitates to prepare the gold-coated zinc oxide flower-like microspheres. The gold-coated zinc oxide flower-like microspheres are good in gas-sensitive sensor performance and photocatalytic performance.

Description

technical field [0001] The invention relates to the field of photocatalysis and gas sensors, in particular to a preparation method of gold-coated zinc oxide flower-like microspheres. technical background [0002] With the continuous development of chemical industry, various additives, plasticizers and other materials are used in various fields. As an external plasticizer, dibutyl phthalate DBP is widely used as a plasticizer in PVC, and also used as a softener in synthetic materials such as digested cotton synthetic rubber, acetate fiber, and leather chemical paints. When the concentration of DBP reaches 1000ppm, it will cause harm to the human body and is a suspected teratogen. Abdominal obesity, or insulin resistance, is a precursor to diabetes, according to a study published in Environmental Health Perspectives using CDC data from the U.S. Centers for Disease Control and Prevention. of U.S. men had higher levels of DEHP and DBP metabolites in their urine than men withou...

Claims

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Application Information

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IPC IPC(8): C01G9/02B82Y30/00B82Y40/00
Inventor 梅超夏炜炜曾祥华
Owner YANGZHOU UNIV
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