Method for preparing molybdenum trioxide doped titanium dioxide nano catalyst

A nano-photocatalyst, titanium dioxide technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of uncontrollable particle size of catalyst powder, same material particles Easy to agglomerate, poor compatibility of the two materials, etc., to achieve the effect of excellent synergistic photocatalytic performance, good dispersibility, and controllable process

Inactive Publication Date: 2018-11-06
HENAN UNIV OF SCI & TECH
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  • Description
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Problems solved by technology

However, in the existing technology for preparing photocatalysts, there are shortcomings such as uncontrollable particle size of the prepared catalyst powder, poor particle dispersibility, high content of introduced impurities, poor mixing of two materials, and easy agglomeration of particles of the same material.
At the same time, in the current reports, there is no successful case of combining the two to prepare photocatalysts, which makes this work innovative.

Method used

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  • Method for preparing molybdenum trioxide doped titanium dioxide nano catalyst
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  • Method for preparing molybdenum trioxide doped titanium dioxide nano catalyst

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preparation example Construction

[0033] A kind of MoO 3 doped TiO 2 The preparation method of nanometer photocatalyst powder, comprises the following steps:

[0034] Step 1. After mixing concentrated nitric acid and distilled water, prepare a dilute nitric acid solution with a concentration of 2-14mol / L, fully stir and mix, and set aside;

[0035] The concentration of dilute nitric acid is shown here, because if its concentration is too high, the reaction of tetrabutyl titanate added later will be insufficient, otherwise, the reaction of ammonium tetramolybdate will be insufficient.

[0036] Step 2. Add tetrabutyl titanate drop by drop to the dilute nitric acid solution prepared in step 1, and stir while adding dropwise. The stirring rate is 600~1200r / min to obtain solution A. Tetrabutyl titanate in solution A The final concentration of ester is 0.02 ~0.2mol / L;

[0037] In this step, the addition of tetrabutyl titanate needs to be carried out under stirring conditions, because tetrabutyl titanate and water...

Embodiment 1

[0049] A kind of MoO 3 doped TiO 2 The preparation method of nanometer photocatalyst powder, comprises the following steps:

[0050] Step 1, after mixing concentrated nitric acid and distilled water, prepare 500ml of dilute nitric acid solution with a concentration of 2mol / L, fully stir and mix, and set aside;

[0051] Step 2: Take 34g (that is, 0.1mol) tetrabutyl titanate, and at a stirring rate of 1000r / min, add tetrabutyl titanate drop by drop to the prepared product in step 1 by adding it dropwise while stirring. In dilute nitric acid solution, make solution A, standby;

[0052] Step 3: Take 92.4g of ammonium tetramolybdate and add it to the solution A prepared in step 2, and stir to make it completely mixed to obtain solution B for subsequent use;

[0053] Step 4. Transfer the solution B prepared in step 3 to the polytetrafluoroethylene lining of the stainless steel hydrothermal kettle, and then put it into a drying oven for hydrothermal reaction. Control the drying ov...

Embodiment 2

[0059] A kind of MoO 3 doped TiO 2 The preparation method of nanometer photocatalyst powder, comprises the following steps:

[0060] Step 1. After mixing concentrated nitric acid with distilled water, prepare 500ml of dilute nitric acid solution with a concentration of 4mol / L, fully stir and mix, and set aside;

[0061] Step 2: Take 3.4g (that is, 0.01mol) of tetrabutyl titanate, and at a stirring rate of 600r / min, add tetrabutyl titanate drop by drop to step 1 to prepare In the dilute nitric acid solution, make solution A, standby;

[0062] Step 3: Take 5.6g of ammonium tetramolybdate and add it into solution A prepared in step 2, stir to make it completely mixed, and then obtain solution B, which is set aside;

[0063] Step 4. Transfer the solution B prepared in step 3 to the polytetrafluoroethylene lining of the stainless steel hydrothermal kettle, and then put it into a drying oven for hydrothermal reaction. Control the drying oven to heat up to 200℃, hydrothermal reac...

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Abstract

The invention discloses a method for preparing a MoO3 doped TiO2 nano catalyst, and belongs to technical application of preparing composite powder with a hydrothermal method. A conventional method forpreparing TiO2 powder has problems that the granularity of powder cannot be controlled and is poor in dispersibility, impurities can be easily introduced, and the like. The method for preparing the MoO3 doped TiO2 nano catalyst comprises the following steps: carrying out a hydrothermal reaction on ammonium tetramolybdate, tetrabutyl titanate and excessive dilute nitric acid in a high-pressure hydrothermal kettle; stirring a hydrothermal product, leaving to stand, cleaning, carrying out suction filtration, and finally drying, thereby obtaining MoO3 doped TiO2 nano catalyst powder. The method has the advantages that molybdenum trioxide and titanium oxide are respectively simultaneously generated by adopting the hydrothermal method, nano granules of the two materials are uniformly mixed andtangled when the two components are mixed, crystal granule growth and granule aggregation can be obstructed by the two components mutually, and nano or submicron order MoO3 doped TiO2 nano catalyst powder with good dispersibility can be prepared.

Description

technical field [0001] The invention relates to the technical field of preparation of nanomaterials, specifically a kind of MoO 3 doped TiO 2 The preparation method of nano photocatalyst powder belongs to a technical application of preparing composite powder by hydrothermal method. Background technique [0002] TiO 2 Because of its strong oxidation ability, high photocatalytic activity, stable physical and chemical properties, and non-toxicity, it is widely used in the fields of air purification, wastewater treatment, and bactericidal self-cleaning. Under the action of normal temperature and pressure and catalysts, it is an effective means of environmental governance to completely oxidize organic pollutants to CO2, H2O and non-toxic products. The principle is that when light with energy greater than or equal to the band gap irradiates the semiconductor, the semiconductor Particles absorb light energy to generate electron-hole pairs. The holes can take away the electrons i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34C02F1/30
CPCB01J23/34B01J35/004C02F1/30C02F2101/308C02F2305/10
Inventor 潘昆明魏世忠赵阳徐流杰张程毛丰陈冲周玉成李秀青王飞鸿杨艳萍王长记
Owner HENAN UNIV OF SCI & TECH
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