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
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[0031] The present invention provides a method for preparing gold-coated zinc oxide flower-shaped microspheres, which includes the following steps:
[0032] (1) Weigh Zn (CH 3 COOH) 2 ·2H 2 O powder, trisodium citrate dihydrate powder, hexamethylenetetramine dissolved in 100ml deionized water, make the molar ratio of the three substances 10:1:10, and stir 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) Wash the obtained precipitate with deionized water and absolute ethanol by alternating centrifugation, and dry the product at 50-70°C for 12 hours;
[0035] (4) Take out the dried product and anneal it at 400°C for 30 minutes to obtain flower-like ZnO powder;
[0036] (5) Add ZnO powder to 100ml deionized water, and then add 110ul HAuCl with a mass percentage of 1% 4 ·4H 2 O was added to it, heated in an oil bath at 100-110°C for 15 minutes, 3ml of trisodium citrate di...
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[0039] Example 1
[0040] The present invention provides a method for preparing gold-coated zinc oxide flower-shaped microspheres, which includes the following steps:
[0041] (1) Weigh 0.01mol of Zn(CH 3 COOH) 2 ·2H 2 O powder 2.1951g, purity 99.99%, Sigma-Aldrich; 0.001mol trisodium citrate dihydrate powder 0.2941g, purity 99.99%, Sigma-Aldrich; 0.01mol hexamethylenetetramine 1.40186g, purity 99.99%, Sigma-Aldrich is dissolved in 100ml deionized water and 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) Wash the obtained precipitate with deionized water and absolute ethanol alternately by centrifugation, and dry the obtained product at 50°C for 12 hours;
[0044] (4) Take out the dried product and anneal it at 400°C for 30 minutes to obtain flower-like ZnO powder;
[0045] (5) Add ZnO powder to 100ml deionized water, and then add 1...
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[0047] Example 2
[0048] The present invention provides a method for preparing gold-coated zinc oxide flower-shaped microspheres, which includes the following steps:
[0049] In step (1), weigh 13.1706g of Zn(CH 3 COOH) 2 ·2H 2 O powder, 1.7646g trisodium citrate dihydrate powder, 8.4112g hexamethylenetetramine dissolved in 100ml deionized water, make the molar ratio of the three substances 10:1:10, and stir for 0.5h;
[0050] In step (2), place the mixed solution in a serum bottle, react at 95°C for 4 hours, and then take out the serum bottle and cool it at room temperature;
[0051] In step (3), the obtained precipitate is washed with deionized water and absolute ethanol by alternating centrifugation, and the obtained product is dried at 60° C. for 12 h;
[0052] In step (5), add ZnO powder to 100ml of deionized water, and then add 110ul of HAuCl with a mass percentage of 1% 4 ·4H 2 O was added to it, and after heating in an oil bath at 105°C for 15 minutes, 3ml of trisodium citrate ...
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