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Preparation method of titanium dioxide-molybdenum trioxide/platinum carbon catalyst

A platinum carbon catalyst and molybdenum trioxide technology, which is applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of slow purification speed and poor air quality Problems, to achieve the effect of improving the environment and good practical value

Active Publication Date: 2020-04-07
陕西瑞科新材料股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a preparation method of titanium dioxide-molybdenum trioxide / platinum carbon catalyst, which solves the problems that the existing photocatalyst titanium dioxide and molybdenum trioxide have poor air quality and slow purification speed when used alone

Method used

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preparation example Construction

[0023] The preparation method of titania-molybdenum trioxide / platinum carbon catalyst of the present invention comprises the following steps:

[0024] Step 1, TiO 2 -MoO 3 Preparation of core-shell nanoparticles

[0025] Step 1.1, taking ammonium heptamolybdate and placing it in deionized water, stirring until completely dissolved to obtain an aqueous solution of ammonium heptamolybdate with a mass concentration of 1-10 mg / ml;

[0026] Step 1.2, take TiO 2 P25 powder is placed in the ammonium heptamolybdate aqueous solution in step 1.1, ultrasonically dispersed until uniformly mixed, then moved into an open round bottom flask, heated in a water bath at a temperature of 80°C-100°C for 1-3h, evaporated and concentrated to obtain TiO 2 -MoO 3 Core-shell nanoparticle colloidal solution; wherein n in ammonium heptamolybdate aqueous solution (Mo) with TiO 2 powder (Ti) The molar ratio is 8:1.

[0027] Step 1.3, the TiO of step 1.2 2 -MoO 3 Colloidal solution of nanoparticl...

Embodiment 1

[0033] (1) TiO 2 -MoO 3 Preparation of core-shell nanoparticles

[0034] Ammonium heptamolybdate (NH 4 ) 6 Mo 7 o 24 4H 2 O is placed in deionized water and stirred until it is completely dissolved to obtain an aqueous solution of ammonium heptamolybdate with a mass concentration of 1 mg / ml; then the TiO 2 P25 powder is placed in ammonium heptamolybdate aqueous solution, ultrasonically dispersed until mixed evenly, then moved into an open round bottom flask, heated in a water bath at 80°C for 1.2h, evaporated and concentrated to obtain TiO 2 -MoO 3 Colloidal solution of nanoparticles with core-shell structure, wherein n in aqueous solution of ammonium heptamolybdate (Mo) with TiO 2 powder (Ti) The molar ratio of TiO is 8:1; 2 -MoO 3 The core-shell nanoparticle colloidal solution was coated on a clean glass substrate by spin coating, dried in an oven at 110°C for 3 hours, then cooled to room temperature, and the coating on the glass substrate was scraped off to obta...

Embodiment 2

[0038] (1) TiO 2 -MoO 3 Preparation of core-shell nanoparticles

[0039] Get ammonium heptamolybdate and place it in deionized water, stir until completely dissolved to obtain an aqueous solution of ammonium heptamolybdate with a mass concentration of 5 mg / ml; 2 P25 powder is placed in ammonium heptamolybdate aqueous solution, ultrasonically dispersed until uniformly mixed, then moved into an open round bottom flask, heated in a water bath at a temperature of 90°C for 2 hours, evaporated and concentrated to obtain TiO 2 -MoO 3 Colloidal solution of nanoparticles with core-shell structure, wherein n in aqueous solution of ammonium heptamolybdate (Mo) with TiO 2 powder (Ti) The molar ratio of TiO is 8:1; 2 -MoO 3 The core-shell nanoparticle colloidal solution was coated on a clean glass substrate by spin coating, and dried in an oven at 115°C for 3.5 hours, then cooled to room temperature, and the coating on the glass substrate was scraped off to obtain TiO 2 -MoO 3 Co...

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Abstract

The invention discloses a preparation method of a titanium dioxide-molybdenum trioxide / platinum-carbon catalyst. The preparation method comprises the following steps of firstly, preparing nano particles of a TiO2-MoO3 core-shell structure; secondly, preparing a mixed system; thirdly, preparing a mixed system carrying platinum metal; and fourthly, performing reduction reaction so as to obtain the TiO2-MoO3 / platinum-carbon catalyst. According to the preparation method, titanium dioxide and molybdenum trioxide are combined to prepare nano particles of the TiO2-MoO3 core-shell structure, then thenano particles are combined with the platinum-carbon catalyst so as to obtain the TiO2-MoO3 / platinum-carbon catalyst. The catalyst is far better than a pure photocatalyst medium in air purification, can be widely used for purifying air in limited spaces like a room, an underground garage, and a tunnel, can improve the environment of the spaces remarkably, is easy in step to prepare, and has high practical value.

Description

technical field [0001] The invention belongs to the technical field of preparation methods of platinum carbon catalysts, and in particular relates to a preparation method of titanium dioxide-molybdenum trioxide / platinum carbon catalysts. Background technique [0002] Photocatalyst is a substance that does not change itself under the irradiation of light, but can promote chemical reactions. Photocatalyst uses the light energy existing in nature to convert into the energy required for chemical reactions to produce catalysis, so that the surrounding oxygen and Water molecules are excited into free negative ions with great oxidative power. Photocatalysts can decompose almost all organic substances and some inorganic substances that are harmful to the human body and the environment. It can not only accelerate the reaction, but also use the rules of nature to avoid waste of resources and additional pollution. Titanium dioxide and molybdenum trioxide are particularly good among ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/652
Inventor 蔡万煜周淑雁李伟峰李晓龙
Owner 陕西瑞科新材料股份有限公司
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