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A kind of photocatalytic self-cleaning composite coating and preparation method thereof

A composite coating and self-cleaning technology, applied in the direction of conductive coatings, coatings, etc., can solve the problems of coatings with no self-cleaning materials, achieve excellent photocatalytic treatment effects, improve photocatalytic ability, and enhance photocatalytic activity.

Active Publication Date: 2022-01-28
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The two-dimensional material MXene is widely used in the field of batteries due to its excellent conductivity, hydrophilicity and catalytic promotion, but there is no self-cleaning material coating based on MXene.

Method used

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  • A kind of photocatalytic self-cleaning composite coating and preparation method thereof
  • A kind of photocatalytic self-cleaning composite coating and preparation method thereof
  • A kind of photocatalytic self-cleaning composite coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Using 1g of niobium aluminum carbide as a precursor, stir vigorously at a temperature of 35°C in 10mL of 40% hydrofluoric acid solution to obtain niobium carbide;

[0031] (2) Transfer the obtained niobium carbide to 10 mL of isopropylamine solution, stir vigorously for 24 hours to intercalate niobium carbide to obtain niobium carbide single-layer nanosheets, and wash off the intercalation agent with deionized water several times after the reaction until The pH of the supernatant is 3-4, add deionized water to a constant volume of 100mL, centrifuge at 3500rpm for 60min to obtain a stable colloidal solution;

[0032] (3) The selected co-solvent isopropanol 5mL, 2mL niobium carbide single-layer nanosheet colloidal solution, 4mL 5wt% titanium dioxide solution, and 20mL tetraethyl orthosilicate are mixed, and the tetraethyl orthosilicate is carried out at a temperature of 25°C and a rotation speed of 300rpm. Hydrolysis reaction;

[0033] (4) Add 12mL of ethanol, 8mL of...

Embodiment 2

[0039] (1) The niobium carbide single-layer nanosheet / titanium dioxide photocatalytic self-cleaning composite coating was prepared in the same manner as in Example 1.

[0040] (2) Use a spray gun to evenly spray the photocatalytic self-cleaning composite coating obtained above on a 30cm*30cm tempered glass under the condition of an air compressor pressure of 0.5-0.6MPa, and let it dry naturally for 24 hours.

[0041] (3) Remove the co-solvent isopropanol in the production process of the niobium carbide single-layer nanosheet / titanium dioxide photocatalytic self-cleaning composite coating, and spray it on the tempered glass as a control group and dry it in the same way.

[0042] (4) The water contact angle of the tempered glass surface sprayed with niobium carbide single-layer nanosheet / titanium dioxide photocatalytic self-cleaning composite coating was measured by a contact angle measuring instrument. figure 2 (a), the water contact angle is 3.82°, demonstrating the superhydr...

Embodiment 3

[0044] (1) Niobium carbide monolayer nanosheets were prepared in the same manner as in Example 1.

[0045] (2) Divide the niobium carbide single-layer nanosheets into two parts. After the reaction, one part is centrifuged with deionized water to wash off the intercalation agent until the pH of the supernatant is 3-4, and then add deionized water to constant volume. 50mL was centrifuged at 3500rpm for 60min to obtain a stable colloidal solution; the other was used as a control group, without washing the intercalation agent, directly added to 50mL of deionized water, and centrifuged at 3500rpm for 60min to obtain a stable colloidal solution.

[0046] (3) The selected co-solvent isopropanol 5mL, 2mL niobium carbide single-layer nanosheet colloidal solution, 4mL 5wt% titanium dioxide solution, and 20mL tetraethyl orthosilicate are mixed, and the tetraethyl orthosilicate is carried out at a temperature of 25°C and a rotation speed of 300rpm. Hydrolysis reaction: mix the same 2mL co...

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Abstract

The invention provides a photocatalytic self-cleaning composite paint and a preparation method thereof, belonging to the field of self-cleaning materials. The coating includes: using MXene precursors as raw materials, MXene accordion-shaped nanosheets are obtained by etching with an etchant, and then intercalated and layered by an intercalation agent to obtain MXene single-layer nanosheets, and the volume ratio is 1-3:1 ‑5: 6‑10 co-solvent, titanium dioxide and silicate carry out hydrolysis reaction, obtain MXene single-layer nanosheet / titanium dioxide photocatalytic self-cleaning composite coating after dilution, the volume ratio of described titanium dioxide and MXene single-layer nanosheet is 1 ‑3: 5‑15. The preparation method of the present invention has simple process and strong operability, and the prepared coating has excellent anti-aging properties, antistatic properties, super-hydrophilic properties and photocatalytic activity, and exhibits excellent antifouling potential and Excellent weather resistance and easy large-scale preparation at the same time have broad application prospects.

Description

technical field [0001] The invention relates to the field of self-cleaning materials, in particular to a photocatalytic self-cleaning composite coating and a preparation method thereof. Background technique [0002] In order to clean dirt such as dust and oil stains on the surfaces of various objects such as walls, vehicles, and glass panels, people currently use four methods: manual scrubbing, water spray washing, machine scrubbing, and self-cleaning surface preparation. The traditional manual cleaning method is not only time-consuming and labor-intensive, but also has extremely high costs, and there are also huge hidden dangers to the personal safety of cleaning personnel. Self-cleaning technology is valued for its significantly reduced number of operations and low maintenance costs. [0003] MXene is a sought-after two-dimensional material in the field of new material research. Since its discovery in 2011, it has attracted the attention of researchers from different dire...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D1/00C09D7/61C09D5/24
CPCC09D1/00C09D7/61C09D5/24
Inventor 谭小飞刘佳琦胡新将付倩敏李江
Owner HUNAN UNIV
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