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Modification method for nano-titanium dioxide on natural stone surface

A nano-titanium dioxide and stone technology, applied in the application field of nano-coating materials, can solve problems such as low quantum efficiency, achieve low water absorption, excellent stain resistance, and a wide range of applications

Inactive Publication Date: 2008-10-29
JINBO SHANGHAI CONSTR GROUP
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AI Technical Summary

Problems solved by technology

[0009] TiO 2 The semiconductor has a large band gap, can only use the near ultraviolet rays in sunlight, and has low quantum efficiency

Method used

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  • Modification method for nano-titanium dioxide on natural stone surface
  • Modification method for nano-titanium dioxide on natural stone surface

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Embodiment Construction

[0030] The present invention adopts the method of low-temperature chemical modification, and first adopts the sol-gel method to prepare TiO with a molar concentration of 2mol / L and a particle size of about 10nm. 2 Transparent sol, the specific preparation method is: respectively take TiCl with a concentration of 2.2mol / L 4 Put 40mL and 80mL of the solution in two 1000mL beakers, dilute with 350mL of distilled water, then use 1:20 ammonia water to adjust the pH value to between 9 and 10, a large amount of precipitates are generated, filter and wash with suction until the washing solution is tested with silver nitrate solution No Cl - exist, then add 60mL, 120mL 30% H 2 o 2 When a clear brown-yellow sol appeared, add 0.1mL and 0.2mL H 3 PO 4 , sieved with a 300-mesh sieve, then moved to a 1000ml three-necked flask, refluxed at a constant temperature of 80°C for 3h, refluxed at 90°C for 5h, and cooled naturally to obtain anatase nano-TiO 2 Sol.

[0031] Then the prepared Ti...

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Abstract

The invention provides a nano-titania surface modification method of natural stone material, belongs to the application field of coating nano-material, and relates to presentation of stone nano-material conception. The modification method comprises mixing 1-3 mol / L nano-titania sol with organic solvent to obtain mixture, coating the mixture onto the natural stone material or soaking the natural stone material into the mixture, drying at a low temperature, and sintering. The nano-titania has a particle size of 5-15nm, and a volume ratio of the nano-titania sol to the organic solvent is 1:(1.5-2.5). The obtained natural stone material surface modified by nano-titania has the advantages of transparent pure and natural color, retained appearance color of natural stone material, environment friendliness, no volatile sharp flavor, non-toxicity, no harm, excellent resistance to soiling, wide application range which is particularly suitable for production of household deck plate, and antibacterial, deodorizing, mould proofing, self-purifying, air cleaning and anti-fouling effects.

Description

technical field [0001] The invention belongs to the application field of nano-coating materials, relates to the proposal of the concept of nano-stone, in particular to a modification method of nano-titanium dioxide on the surface of natural stone, which is a combination of natural stone and nano-technology. Background technique [0002] With the development of the building materials industry, materials that are conducive to resource conservation and green environmental protection will become popular. Natural stone is more and more popular as a reliable and beautiful building and decoration material, but natural stone itself does not have the ability to degrade harmful substances such as formaldehyde and benzene. [0003] In recent years, TiO 2 Photocatalytic oxidation technology has attracted extensive attention in the fields of materials science, chemistry, and environmental science and engineering, and a large number of researches have been carried out. Practice has prov...

Claims

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Application Information

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IPC IPC(8): C04B41/50
CPCC04B41/5041C04B2111/2061
Inventor 陶冶向彪吕伟丽
Owner JINBO SHANGHAI CONSTR GROUP
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