A kind of micro-nano structured photocatalytic coating and preparation method thereof

A technology of micro-nano structure and photocatalysis, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc. It can solve the problems of poor photocatalytic performance of coatings, high requirements for raw materials and equipment, and low deposition rate, etc. problem, achieve the effect of reducing TiO2 agglomeration, low cost and good combination

Active Publication Date: 2019-04-16
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Currently, traditional TiO 2 Coating preparation methods mainly include sol-gel method, chemical vapor deposition method, electrochemical method, etc. These traditional preparation methods have low deposition rate, complex technology, high requirements for raw materials and equipment, high cost, or coating gloss The catalytic performance is poor, so in order to achieve TiO 2 The large-scale application of coatings and coatings with excellent photocatalytic self-cleaning properties urgently require the development of a new low-cost, large-area coating preparation technology suitable for industrial production

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  • A kind of micro-nano structured photocatalytic coating and preparation method thereof
  • A kind of micro-nano structured photocatalytic coating and preparation method thereof
  • A kind of micro-nano structured photocatalytic coating and preparation method thereof

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Embodiment 1

[0039] In the present embodiment, the selected substrate is a 316L stainless steel sheet with a thickness of about 2mm, and the nanometer HA-TiO 2 The thickness of the photocatalytic composite is about 50 μm, and the mass percentage of nano-HA in the coating is 30wt%. The coating is a porous micro-nano structure, mainly including nano-HA-TiO 2 The particles are piled up, and the nano-HA is spherical, and the TiO in the coating 2 The crystal forms are anatase phase and rutile phase, and the anatase phase has no obvious transformation, and the coating is well combined with the substrate. The concrete preparation method of this coating is as follows:

[0040] (1) The concentration of calcium nitrate solution is configured to be 2.5mol / L, and the concentration of ammonium dihydrogen phosphate solution is 1.5mol / L;

[0041] (2) After curing the hydroxyapatite precursor slurry for 5 hours, add commercially available P25 with an average particle size of 25nm, in which TiO 2 The ma...

Embodiment 2

[0053] In the present embodiment, the selected substrate is a 316L stainless steel sheet with a thickness of about 2mm, and the nanometer HA-TiO 2 The thickness of the photocatalytic composite is about 100μm, and the mass percentage of nano-HA in the coating is 40wt%. The coating is a porous micro-nano structure, mainly including nano-HA-TiO 2 The particles are piled up, and the nano-HA is needle-shaped, and the TiO in the coating 2 The crystal forms are anatase phase and rutile phase, and the anatase phase has no obvious transformation, and the coating is well combined with the substrate. The concrete preparation method of this coating is as follows:

[0054] (1) The concentration of calcium nitrate solution is configured to be 2.5mol / L, and the concentration of ammonium dihydrogen phosphate solution is 1.5mol / L;

[0055] (2) After curing the hydroxyapatite precursor slurry for 1.5 hours, add commercially available P25 with an average particle size of 25nm, in which TiO 2 ...

Embodiment 3

[0067] In this embodiment, the selected substrate is a 304 stainless steel sheet with a thickness of about 2mm, and the nanometer HA-TiO 2 The thickness of the photocatalytic composite is about 80 μm, and the mass percentage of nano-HA in the coating is 35wt%. The coating is a porous micro-nano structure, mainly including nano-HA-TiO 2 The particles are piled up, and the nano-HA is spherical, and the TiO in the coating 2 The crystal forms are anatase phase and rutile phase, and the anatase phase has no obvious transformation, and the coating is well combined with the substrate. The concrete preparation method of this coating is as follows:

[0068] (1) The concentration of calcium nitrate solution is configured to be 2.5mol / L, and the concentration of ammonium dihydrogen phosphate solution is 1.5mol / L;

[0069] (2) After curing the hydroxyapatite precursor slurry for 4 hours, add commercially available P25 with an average particle size of 25nm, in which TiO 2 The mass perce...

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Abstract

The invention relates to a photocatalytic coating with a micro-nano structure and a preparation method for the photocatalytic coating, and belongs to the technical field of catalysts. The preparation method comprises the following steps: coating nano titanium dioxide with hydroxyapatite to form composite material suspension liquid; and spraying and depositing the composite material suspension liquid to the surface of a base material through a thermal spraying process, thereby obtaining the nano titanium dioxide photocatalytic coating coated with the nano hydroxyapatite material. The HA-TiO2 nano composite photocatalytic coating prepared by the preparation method has the characteristics of a porous micro-nano structure, a high specific surface area, excellent adsorption performance and a strong photocatalytic property; and the preparation method is simple to operate, is low in cost and is suitable for industrial production.

Description

technical field [0001] The invention relates to a micro-nano structure HA-TiO with high specific surface area 2 A (hydroxyapatite / titanium dioxide) photocatalytic coating and a preparation method thereof belong to the technical field of catalysts. Background technique [0002] Environmental issues have become the key factors facing human survival and development. Air pollution, water pollution and other problems are becoming more and more serious, and there is an urgent need to develop advanced environmental governance technologies. At present, for environmental pollution problems, the main materials are physical adsorption method, chemical oxidation method, microbial treatment method and high temperature incineration method. Although these methods have played an important role in environmental protection and governance, they also have some problems to varying degrees. , such as (1) the degradation efficiency of pollutants is low, the degradation is not complete, and secon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/18B01J37/02
CPCB01J27/1806B01J35/004B01J37/0217B01J37/0225B01J37/0228
Inventor 黄伟东
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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