Nano photocatalytic hydrosol and preparation method thereof

A hydrosol and photocatalytic technology, applied in the field of nanomaterials, can solve the problems of inability to obtain hydrosol, inapplicability, etc., and achieve the effects of wide application range, no environmental pollution problem, and simple preparation method.

Inactive Publication Date: 2015-09-30
SHENZHEN GUANGRENDA IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because it adopts the method of electrodeposition, it needs to be carried out on a well-treated smooth surface, and a hydrosol with excellent dispersibility cannot be obtained, so it cannot be applied to occasions that require roller coating, spraying, etc.

Method used

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  • Nano photocatalytic hydrosol and preparation method thereof
  • Nano photocatalytic hydrosol and preparation method thereof
  • Nano photocatalytic hydrosol and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add hydrochloric acid to 100ml of 0.04mol / L ammonium metatungstate aqueous solution to make the pH value of the solution 1, put it in a hydrothermal reaction kettle at 280°C for 15 hours, and then cool to room temperature to obtain an average particle diameter of 30nm and a pH value of 3 Nano WO 3 Water sol, heat the water sol to 80°C, add 20g of methyl titanate to make the molar ratio of Ti:W 3:1, keep the temperature for 2 hours, and cool it to room temperature to obtain a solid content of 20% and an average particle size of 50nm. The transmission electron micrographs and photoresponse curves of the hydrosol and its nanoparticles are as follows: figure 1 with4 shown.

Embodiment 2

[0025] Add acetic acid to 100ml of 0.001mol / L ammonium metatungstate aqueous solution to make the pH value of the solution 4, put it in a hydrothermal reaction kettle at 160°C for 3 hours and cool to room temperature to obtain particles with an average diameter of 10nm and a pH value of 6 Nano WO 3 Hydrosol, heat the hydrosol to 100°C, add 8.2g of ethyl titanate to make the molar ratio of Ti:W 30:1, keep the temperature for 5h, and cool it to room temperature to obtain a solid content of 5.6% and an average particle size of 80nm The hydrosol, the transmission electron micrographs of its nanoparticles and the photoresponse curve are as follows figure 2 with 5 shown.

Embodiment 3

[0027] Add nitric acid to 100ml of 0.005mol / L ammonium metatungstate aqueous solution to make the pH value of the solution 2, place it in a hydrothermal reaction kettle at 260°C for 18 hours and cool to room temperature to obtain particles with an average diameter of 60nm and a pH value of 4 Nano WO 3 Water sol, heat the water sol to 80°C, add 10.2g butyl titanate to make the molar ratio of Ti:W 5:1, keep the temperature for 3 hours, and cool it to room temperature, you can get a solid content of 3.8% and an average particle size of 90nm The hydrosol, the transmission electron micrographs of its nanoparticles and the photoresponse curve are as follows image 3 with 6 shown.

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Abstract

The invention provides photocatalytic hydrosol with a wide light absorption and responding range and a preparation method thereof. The photocatalytic hydrosol is characterized by consisting of spherical nano WO3/TiO2 with a core-shell structure and water, wherein the pH value of the hydrosol is ranged from 3 to 6, and nano WO3 is a core of which the average particle diameter is 5-80nm; nano TiO2 is a shell which is 5-50nm in thickness; the total particle average diameter is 10-100nm. The hydrosol is prepared by two steps of preparing nano WO3 hydrosol by a hydrothermal reaction method and then preparing hydrosol wrapped by nano TiO2 to form the nano WO3/TiO2 hydrosol with the core-shell structure. The hydrosol with the core-shell structure, which is prepared by the preparation method, has a wide light absorption range and is high in photocatalysis capacity; as the hydrosol is an aqueous preparation, the problem of environmental pollution is solved; the preparation method has the advantages of simplicity, low cost, wide use range and the like.

Description

technical field [0001] The invention belongs to the field of nanometer materials, in particular to a nanophotocatalytic hydrosol with a wide absorption range and a preparation method thereof. technical background [0002] With the continuous development of the global industrialization process and the increasing emphasis on family air quality, environmental pollution and interior decoration air pollution and other issues are becoming more and more serious. Environmental protection, health and sustainable development have become the primary issues that humans must consider. Photocatalytic technology as A representative of green chemistry, it can convert solar energy into chemical energy and electrical energy under light, and can degrade various organic pollutants in water and air. It has strong oxidation ability, complete degradation of organic pollutants, reusable, energy-saving and high-efficiency Etc. [0003] Due to its good photocatalytic performance, strong stability, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/30B82Y30/00B82Y40/00
Inventor 袁双龙
Owner SHENZHEN GUANGRENDA IND CO LTD
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