Method for preparing doped nanometer titanium oxide photocatalyst

A technology of nano-titanium dioxide and photocatalyst, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc. It can solve problems affecting photocatalytic activity and achieve good dispersion , uniform particle size distribution, and strong catalytic activity

Inactive Publication Date: 2008-11-12
INNER MONGOLIA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0024] The technical problem to be solved in the present invention is to provide a preparation method of doped nano-titaniu

Method used

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  • Method for preparing doped nanometer titanium oxide photocatalyst
  • Method for preparing doped nanometer titanium oxide photocatalyst
  • Method for preparing doped nanometer titanium oxide photocatalyst

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Embodiment 1

[0037] Such as figure 1 As shown, accurately weigh or measure 1.5g of cetyltrimethylammonium bromide, 2.7mL of n-hexanol, 16.8mL of n-heptane and 1M TiCl 4 Solution 1.64mL and 1M SnCl 4 Put 0.16 mL of the solution in an Erlenmeyer flask and stir until a uniform microemulsion is formed; accurately weigh or measure 1.5 g of cetyltrimethylammonium bromide, 2.7 mL of n-hexanol, and 2.7 mL of n-heptane in another Erlenmeyer flask 16.8mL and 1.8mL of 1M NaOH solution, stir until a uniform microemulsion is formed. Mix the above two groups of microemulsions, stir them, move them into a hydrothermal reaction kettle, put them into an oven, and react at 180°C for 8 hours. After the reaction is completed and naturally cooled, open the hydrothermal reaction kettle, and take out the white powder at the bottom by centrifugation. Wash it three times with ethanol and deionized water, and bake it in a high-temperature oven at 600°C for 2 hours to obtain doped nano-TiO 2 :Sn 4+ Photocatalyst...

Embodiment 2

[0041] Such as figure 1 As shown, accurately weigh or measure 1.5g of cetyltrimethylammonium bromide, 2.7m of n-hexanol, 16.8mL of n-heptane and 1M TiCl 4 Solution 1.64mL and 1M La(NO 3 ) 3 Put 0.16 mL of the solution in an Erlenmeyer flask and stir until a uniform microemulsion is formed; accurately weigh or measure 1.5 g of cetyltrimethylammonium bromide, 2.7 mL of n-hexanol, and 2.7 mL of n-heptane in another Erlenmeyer flask 16.8mL and 1.8mL of 1M NaOH solution, stir until a uniform microemulsion is formed. Mix the above two groups of microemulsions, stir them, move them into a hydrothermal reaction kettle, put them into an oven, and react at 180°C for 8 hours. After the reaction is completed and naturally cooled, open the hydrothermal reaction kettle, and take out the white powder at the bottom by centrifugation. Wash it three times with ethanol and deionized water, and bake it in a high-temperature oven at 600°C for 2 hours to obtain doped nano-TiO 2 :La 3+ catalyst...

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Abstract

The invention discloses a preparation method of doped nanometer titanium dioxide photocatalyst, the main process is to prepare precursor mixed liquor of nitrate and titanium tetrachloride doped with ions with certain concentration according to fixed doping proportion, which comprises following steps: adding cetyl trimethyl ammonium bromide, n-hexyl alcohol, normal heptane and precursor mixed liquor according to microemulsion composition proportion, stirring until to form even microemulsion; meanwhile, preparing another microemulsion with the same composition using sodium hydroxide or hydrochloric acid to replace the precursor liquor, stirring until to form even microemulsion; after mixing and stirring two microemulsions, moving to a stainless steel hydrothermal reaction kettle, after completing reaction, separating and taking out white powders, cleaning the white powders by alcohol and water in turn, then baking in the high temperature oven, namely obtaining the doped nanometer titanium dioxide photocatalyst product. The photocatalyst enables the catalytic degradation ratio of phenol and formaldehyde higher than 90%, and has advantages of short catalytic time, high efficiency and recycle use. The invention has great application value on treating industry phenol waste water and city air purification to remove formaldehyde and benzene series organic pollutant.

Description

technical field [0001] The invention relates to a preparation method of a catalyst, in particular to a preparation method of a doped nano titanium dioxide photocatalyst. Background technique [0002] Currently, indoor air pollution is a cause for concern. Along with the raising of people's living standard, it is necessary for every family to decorate and beautify the living room. However, the resulting indoor air pollution also poses a threat to people. Usually, indoor air pollution mainly comes from various decoration materials. Formaldehyde, benzene series and other harmful substances slowly released from these materials cause great harm to people and become invisible killers. [0003] In response to this situation, various indoor air pollution control and purification technologies have emerged as the times require. Photocatalyst technology is an environmentally friendly new technology developed in recent years for indoor air purification and pollution control. Using t...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J23/10B01J23/14B01J37/02
Inventor 张军陈程刘宝仓狄晓威冯建勇杨承旭刘志亮
Owner INNER MONGOLIA UNIVERSITY
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