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Zinc oxide nanosheet-coated hollow glass bead photocatalytic reflection composite pigment and synthetic method thereof

A technology of hollow glass microspheres and zinc oxide nanometers, which is applied in the field of inorganic pigments, can solve problems affecting photocatalytic effects, and achieve the effects of reducing air-conditioning energy consumption, high solar reflectance, and high photocatalytic activity

Active Publication Date: 2017-08-18
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nano-zinc oxide is very easy to agglomerate, which affects its photocatalytic effect.

Method used

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  • Zinc oxide nanosheet-coated hollow glass bead photocatalytic reflection composite pigment and synthetic method thereof
  • Zinc oxide nanosheet-coated hollow glass bead photocatalytic reflection composite pigment and synthetic method thereof
  • Zinc oxide nanosheet-coated hollow glass bead photocatalytic reflection composite pigment and synthetic method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] A method for synthesizing zinc oxide nanosheet-coated hollow glass micropearl photocatalytic reflective composite pigments, comprising the following steps:

[0027] (1) Add 10g of hollow glass microspheres to 150ml of 10% sodium hydroxide solution and stir for 12h to filter and dry for later use; 0.52g of zinc nitrate and 0.4g of sodium hydroxide are dissolved in 78.4g of isopropanol respectively In, liquid A and liquid B were obtained respectively.

[0028] (2) Add the hollow glass microspheres pretreated in step 1 to the mixture of liquid A and liquid B at a volume ratio of 4:1, keep stirring for 15 minutes, filter, dry at 90°C for 12 hours, and then calcinate at 400°C After 1 h, a sample of zinc oxide seeds loaded on hollow glass microspheres was obtained.

[0029] (3) Add the calcined sample to the growth solution that is fully mixed with 7.44g of zinc nitrate, 4.78g of triethanolamine and 500g of distilled water, keep stirring at 90°C for 6h, filter, and dry at 90...

Embodiment 2

[0043] A method for synthesizing zinc oxide nanosheet-coated hollow glass micropearl photocatalytic reflective composite pigments, comprising the following steps:

[0044] (1) Add 5 g of hollow glass microspheres to 150 ml of 10% sodium hydroxide solution, stir for 12 h, filter and dry for later use. Dissolve 0.52g of zinc nitrate and 0.4g of sodium hydroxide in 78.4g of isopropanol and divide them into liquid A and liquid B.

[0045] (2) Add the pretreated hollow glass microspheres to the mixture of A and B mixed at a volume ratio of 4:1, continue to stir for 15 minutes, filter and dry at 90°C for 12h, and then calcinate at 400°C for 0.5h to obtain hollow glass microspheres. Bead-loaded ZnO seed samples.

[0046] (3) Add the calcined sample to the growth solution that is fully mixed with 7.44g of zinc nitrate, 4.78g of triethanolamine and 500g of distilled water, keep stirring at 90°C for 6h, filter, and dry at 90°C for 12h to obtain zinc oxide Nanosheet-coated hollow glass...

Embodiment 3

[0048] A method for synthesizing zinc oxide nanosheet-coated hollow glass micropearl photocatalytic reflective composite pigments, comprising the following steps:

[0049] (1) Add 10 g of hollow glass microspheres into 150 ml of 10% sodium hydroxide solution, stir for 12 h, filter and dry for later use. Dissolve 0.52g of zinc nitrate and 0.4g of sodium hydroxide in 78.4g of isopropanol and divide them into liquid A and liquid B.

[0050] (2) Add the pretreated hollow glass microspheres to the mixture of A and B mixed at a volume ratio of 2:1, continue to stir for 15 minutes, filter and dry at 90°C for 12h, and then calcinate at 400°C for 0.5h to obtain hollow glass microspheres. Bead-loaded ZnO seed samples.

[0051] (3) Add the calcined sample to the growth solution that is fully mixed with 7.44g of zinc nitrate, 4.78g of triethanolamine and 500g of distilled water, keep stirring at 80°C for 6h, filter, and dry at 90°C for 12h to obtain zinc oxide Nanosheet-coated hollow gl...

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Abstract

The invention discloses zinc oxide nanosheet coated hollow glass bead photocatalytic reflection composite pigment and a synthetic method thereof. The synthetic method is characterized by firstly pretreating hollow glass beads in an alkaline solution for standby use; respectively dissolving zinc nitrate and an alkaline compound in organic solvents, thus respectively obtaining a solution A and a solution B; adding the pretreated hollow glass beads in to a mixed solution prepared from the solution A and the solution B, continuously stirring, and roasting after filtering and drying, thus obtaining a hollow glass bead-loaded zinc oxide seed sample; adding the roasted sample into a growth solution prepared from the zinc nitrate, the alkaline compound and distilled water through mixing, and filtering and drying after stirring. A product provided by the invention not only has the properties of light weight, heat insulation and the like of the hollow glass beads, but also has the properties of photo-reflection and photo-catalysis of zinc oxide; the near infrared reflection rate of the product under a room temperature is higher than 90 percent, and the degradation rate of the product on Rhodamine B within 3 hours under the condition of 25 DEG C is higher than 90 percent; the product can be applied to the field of reflective thermal insulation coating and environment protection.

Description

technical field [0001] The present invention relates to the preparation of a zinc oxide nanosheet coated hollow glass microsphere composite pigment, in particular to a preparation of a flake nano zinc oxide coated hollow glass microsphere composite pigment with high photocatalytic activity and near-infrared reflectivity at the same time The preparation method belongs to the field of inorganic pigments. Background technique [0002] The problems of energy depletion and environmental pollution are related to the well-being of all mankind, and have received more and more attention and attention from the whole society. Building energy consumption accounts for 30-40% of the total energy consumption in society. Among them, the energy consumption of air-conditioning and heating accounts for 60-70% of the energy consumption of building operation. Building energy consumption has caused a heavy energy burden and Serious environmental pollution also restricts the sustainable developme...

Claims

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Application Information

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IPC IPC(8): C09C1/00C09C3/06B01J23/06C09D5/33C09D7/12
CPCC09D7/70C09C1/0081C09C3/063C09D5/004B01J23/06B01J37/0217C01P2006/22C01P2006/32C01P2006/10C01P2004/80B01J35/39
Inventor 高强吴笑梅鲁登辉樊粤明
Owner SOUTH CHINA UNIV OF TECH
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