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Preparation method of C and N co-doped nano titania

A technology of nano-titanium dioxide and titanium dioxide, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problems of low utilization rate of visible light, poor doping effect, cumbersome steps, etc., and achieve efficient use of light Catalytic activity, excellent effect, simple operation

Active Publication Date: 2019-08-02
HEBEI MILSON TITANIUM DIOXIDE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problems of poor doping effect, low utilization rate of visible light, cumbersome steps and high price in current doped modified titanium dioxide, the present invention invented a method for preparing C and N co-doped nano titanium dioxide. The method steps are simple, the raw material is cheap, and the C and N doping effects are excellent, so as to achieve the effects of expanding the photoresponse range and increasing the specific surface area, thereby improving the photocatalytic activity of titanium dioxide and improving the efficiency of sunlight for organic pollutants. Ability to photocatalytically degrade

Method used

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  • Preparation method of C and N co-doped nano titania
  • Preparation method of C and N co-doped nano titania
  • Preparation method of C and N co-doped nano titania

Examples

Experimental program
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Effect test

Embodiment 1

[0028] A, 10g deionized water is added in 100g ammonium carbonate, grind while adding, deionized water adds flow rate and is 10mL / min, after adding, continue to grind 2h, make ammonium carbonate solid-liquid mixed slurry;

[0029] B. Add 4000g of metatitanic acid into the ammonium carbonate solid-liquid mixed slurry under stirring at 300r / min. The adding speed is 100g / min. ammonium carbonate;

[0030] C. Dry the product obtained in step B at 30° C. for 5 hours;

[0031] D. Calcining the dried metatitanic acid-coated ammonium carbonate obtained in step C at 500° C. for 4 hours to obtain C and N co-doped titanium dioxide;

[0032] E. Jet milling the product obtained in step D to obtain C and N co-doped nano-titanium dioxide with an average particle size of 79 nm.

Embodiment 2

[0034] A, 8g deionized water is added in 100g ammonium carbonate, grind while adding, deionized water adds flow rate and is 8mL / min, after adding, continue to grind 2h, make ammonium carbonate solid-liquid mixed slurry;

[0035] B. Add 4000g of metatitanic acid into the ammonium carbonate solid-liquid mixed slurry under stirring at 300r / min. The adding speed is 80g / min. ammonium carbonate;

[0036] C. Dry the product obtained in step B at 30° C. for 4 hours;

[0037] D. Calcining the dried metatitanate-coated ammonium carbonate obtained in step C at 600° C. for 6 hours to obtain C and N co-doped titanium dioxide;

[0038] E. Jet milling the product obtained in step D to obtain C and N co-doped nano-titanium dioxide with an average particle size of 75 nm.

Embodiment 3

[0040] A, 9g deionized water is added in 100g ammonium carbonate, grind while adding, deionized water adds flow rate and is 9mL / min, after adding, continue to grind 2h, make ammonium carbonate solid-liquid mixed slurry;

[0041] B. Add 4000g of metatitanic acid to the ammonium carbonate solid-liquid mixed slurry under stirring at 300r / min. The adding speed is 90g / min. ammonium carbonate;

[0042] C. Dry the product obtained in step B at 40° C. for 5 hours;

[0043] D. Calcining the dried metatitanic acid-coated ammonium carbonate obtained in step C at 600° C. for 8 hours to obtain C and N co-doped titanium dioxide;

[0044] E. Jet milling the product obtained in step D to obtain C and N co-doped nano-titanium dioxide with an average particle size of 77 nm.

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Abstract

The invention discloses a preparation method of C and N co-doped nano titania and belongs to the technical field of modified titania photocatalysts. The preparation method comprises steps as follows:A, deionized water is added to ammonium carbonate, grinding is performed during addition, grinding is continued after addition, and ammonium carbonate solid-liquid mixed slurry is prepared; B, metatitanic acid is added to the prepared ammonium carbonate solid-liquid mixed slurry during stirring, stirring and film coating are continued after addition, and metatitanic acid coated ammonium carbonateis prepared; C, the prepared metatitanic acid coated ammonium carbonate is dried at 30-40 DEG C for 4-5 h; D, the dried metatitanic acid coated ammonium carbonate is calcined, and C and N co-doped titania is prepared; E, the prepared C and N co-doped titania is subjected to air jet pulverization, and C and N co-doped nano titania is prepared. The preparation method is simple, the specific surfacearea of modified titania can be effectively increased, and the photocatalysis of titania is improved.

Description

technical field [0001] The invention belongs to the technical field of modified titanium dioxide photocatalysts, and relates to a preparation process of modified titanium dioxide photocatalysts, in particular to a preparation method of C and N co-doped nanometer titanium dioxide. The preparation method of the invention is simple, can effectively increase the specific surface area of ​​the titanium dioxide, and improve the photocatalytic performance of the titanium dioxide. Background technique [0002] With the development of industry and the rapid growth of population, the pollution produced in life and production is becoming more and more serious, and all kinds of pollution pose a huge threat to human health, such as causing cancer. Therefore, it is urgent to find an efficient and green pollution treatment method. Among them, photocatalytic pollution treatment has become an efficient and green pollution treatment method because it uses a steady stream of renewable solar e...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/02B01J35/10
CPCB01J27/24B01J35/61B01J35/40B01J35/39
Inventor 张建平张川张千
Owner HEBEI MILSON TITANIUM DIOXIDE
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