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
View PDF5 Cites 26 Cited by
  • 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 o

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • 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

Experimental program
Comparison scheme
Effect test

Example Embodiment

[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...

Example Embodiment

[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...

Example Embodiment

[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 ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C01G9/02B82Y30/00B82Y40/00
Inventor 梅超夏炜炜曾祥华
Owner YANGZHOU UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products