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Nano-titanium dioxide sol with visible light activity

A nano-titanium dioxide and visible light technology, applied in the field of photocatalytic materials, can solve problems such as unfavorable practical application of powder products, nano-titanium dioxide is not suitable for indoor air treatment products or exterior wall self-cleaning products, and it is difficult to obtain nano-titanium dioxide, etc. Achieve high visible light activity and photocatalytic effect, convenient for practical application, and beneficial to industrial production.

Active Publication Date: 2019-05-10
FIRST NEW MATERIAL TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nano-titanium dioxide generally only has ultraviolet light activity, and it is difficult to prepare nano-titanium dioxide with visible light activity.
[0003] In the prior art, nano-titanium dioxide with visible light activity is usually prepared by doping and modifying nano-titanium dioxide (for example: doping quantum dots to nano-titanium dioxide), but the visible-light active nano-titanium dioxide obtained in the prior art Nano titanium dioxide is a powder product, and powder products are not conducive to practical applications, for example: powder nano titanium dioxide is not suitable for indoor air treatment products or external wall self-cleaning products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A nano-titanium dioxide sol with visible light activity is prepared by the following steps:

[0026] Step a1, get 43.21g of TiCl 4 liquid (equivalent to 0.227 mol Ti 4+ ), and dissolved in 3000g of cold water to obtain TiCl 4 Hydrolyzate.

[0027] Step b1, to the TiCl prepared in step a1 4 Add dropwise 50g mass fraction in the hydrolyzate and be 30% hydrogen peroxide (equivalent to 0.44 mole H 2 o 2 , namely Ti 4+ :H 2 o 2 The molar ratio is about 1:2), so as to obtain the titanium peroxide composite.

[0028] Step c1, add 25% ammonia water dropwise to the titanium peroxide complex prepared in step b1 until the pH value of the liquid after mixing is 10, continue to stir and react for 30 minutes, then filter and wash to obtain hydrated peroxide titanium.

[0029] Step d1, redissolving the hydrated titanium peroxide prepared in step c1 in water, and mixing it with the carbon quantum dot solution, so that the mass ratio of carbon quantum dots and hydrated titaniu...

Embodiment 2

[0031] A nano-titanium dioxide sol with visible light activity is prepared by the following steps:

[0032] Step a2, take 43.21g of TiCl 4 liquid (equivalent to 0.227 mol Ti 4+ ), and dissolved in 3000g of cold water to obtain TiCl 4 solution.

[0033] Step b2, to the TiCl that step a2 makes 4 Add dropwise 100g mass fraction of 30% hydrogen peroxide (equivalent to 0.88 mole H 2 o 2 , namely Ti 4+ :H 2 o 2 The molar ratio is about 1:4), so as to obtain the titanium peroxide composite.

[0034] Step c2, add dropwise ammonia water with a mass fraction of 25% to the titanium peroxide complex prepared in step b2 until the pH value of the liquid after mixing is 10, continue to stir and react for 30 minutes, and then filter and wash to obtain hydrated peroxide titanium.

[0035] Step d2, the hydrated titanium peroxide prepared by step c2 is dissolved in water, and mixed with the carbon quantum dot solution, so that the mass ratio of carbon quantum dots and hydrated titanium...

Embodiment 3

[0037] A nano-titanium dioxide sol with visible light activity is prepared by the following steps:

[0038] Step a3, take 145.52g of TiOSO 4 Solid (equivalent to 0.910 mol Ti 4+ ), and dissolved in 3000g of cold water to obtain TiOSO 4 solution.

[0039] Step b3, to the TiOSO that step a3 makes 4 Add dropwise 825g mass fraction in the solution and be 30% hydrogen peroxide (equivalent to 0.44 mole H 2 o 2 , namely Ti 4+ :H 2 o 2 The molar ratio is about 1:8), so as to prepare the titanium peroxide composite.

[0040]Step c3, add dropwise ammonia water with a mass fraction of 25% to the titanium peroxide complex prepared in step b3 until the pH value of the mixed liquid is 10, continue to stir and react for 30 minutes, and then filter and wash to obtain hydrated peroxide titanium.

[0041] Step d3, the hydrated titanium peroxide prepared by step c3 is dissolved in water, and mixed with the carbon quantum dot solution, so that the mass ratio of carbon quantum dots and h...

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PUM

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Abstract

The invention discloses nano-titanium dioxide sol with visible light activity. A preparation method of the sol includes the steps: performing reaction on Ti4+ saline solution and hydrogen peroxide toprepare a titanium peroxide compound; mixing the titanium peroxide compound and ammonium hydroxide, enabling a pH (potential of hydrogen) value of mixed liquid to reach 7-10, and preparing hydrated titanium peroxide after reaction is completed; dissolving the hydrated titanium peroxide in water, mixing mixture and carbon quantum dot solution, and enabling the weight ratio of carbon quantum dots inmixed solution to titanium dioxide to be (0.1-10):100; performing reaction for 4-10 hours at the temperature of 60-100 DEG C to prepare the nano-titanium dioxide sol with the visible light activity.The nano-titanium dioxide sol has high visible light activity and photocatalysis effects, practical application of the sol is more convenient than that of a powder product, the preparation method of the sol is simple, and industrial production is facilitated.

Description

technical field [0001] The invention relates to the field of photocatalytic materials, in particular to a nano titanium dioxide sol with visible light activity. Background technique [0002] Nano-titanium dioxide has high photocatalytic activity, can produce strong photooxidation and reduction capabilities, and can catalyze or photolyze some inorganic substances and organic substances such as formaldehyde. application prospects. However, nano-titanium dioxide generally only has ultraviolet light activity, and it is difficult to prepare nano-titanium dioxide with visible light activity. [0003] In the prior art, nano-titanium dioxide with visible light activity is usually prepared by doping and modifying nano-titanium dioxide (for example: doping quantum dots to nano-titanium dioxide), but the visible-light active nano-titanium dioxide obtained in the prior art All nano-titanium dioxide is a powder product, and powder products are not conducive to practical applications, f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18C09D7/61
Inventor 刘东华张仁哲房晓梅
Owner FIRST NEW MATERIAL TECH DEV
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