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Preparation and use methods of nitrogen-vanadium co-doped modified titanium dioxide catalyst

A titanium dioxide, co-doping technology, applied in physical/chemical process catalysts, chemical instruments and methods, inorganic chemistry, etc., can solve problems such as rare reports, achieve easy control, broad development prospects, and improve the effect of visible light activity

Inactive Publication Date: 2011-02-16
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The effect of co-doped nano-titanium dioxide on visible light decolorization and photocatalytic degradation of organic matter has been reported, but the effect on the oxidation of sulfur dioxide under visible light conditions is rarely reported.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A preparation method for a titanium dioxide catalyst for sulfur dioxide oxidation to sulfuric acid, comprising the steps of:

[0041] (1) Preparation of solution A: drop butyl titanate from the separatory funnel into absolute ethanol under rapid stirring (about 120r / min), and maintain the volume ratio of butyl titanate to absolute ethanol at 3: 8. Mix to form a light yellow transparent solution, weigh hexamethylenetetramine according to the molar ratio of nitrogen atoms to titanium atoms being 0.3, and then add hexamethylenetetramine to the above solution to obtain A solution;

[0042] (2) Prepare B solution: add glacial acetic acid and high-purity water to absolute ethanol, maintain the volume ratio of glacial acetic acid: high-purity water: absolute ethanol as 2: 1: 8, and then weigh it according to the molar ratio of vanadium atom and titanium atom as 0.001 Get ammonium metavanadate, add in the above-mentioned solution that is prepared by glacial acetic acid, high-pu...

Embodiment 2

[0049] A preparation method for a titanium dioxide catalyst for sulfur dioxide oxidation to sulfuric acid, comprising the steps of:

[0050] (1) Preparation of solution A: drop butyl titanate from the separatory funnel into absolute ethanol under rapid stirring (about 150r / min), and maintain the volume ratio of butyl titanate to absolute ethanol at 17: 40. Mix to form a light yellow transparent solution, weigh hexamethylenetetramine according to the molar ratio of nitrogen atoms to titanium atoms being 0.5, and then add hexamethylenetetramine to the above solution to obtain A solution;

[0051] (2) Prepare B solution: add glacial acetic acid and high-purity water to absolute ethanol, maintain the volume ratio of glacial acetic acid: high-purity water: absolute ethanol as 2: 1: 8, and then weigh it according to the molar ratio of vanadium atoms and titanium atoms to 0.003 Get ammonium metavanadate, add in the above-mentioned solution that is prepared by glacial acetic acid, hig...

Embodiment 3

[0058] A preparation method for a titanium dioxide catalyst for sulfur dioxide oxidation to sulfuric acid, comprising the steps of:

[0059] (1) Prepare solution A: drop butyl titanate from the separatory funnel into absolute ethanol under rapid stirring (about 160r / min), and maintain the volume ratio of butyl titanate to absolute ethanol at 1: 2. Mix to form a light yellow transparent solution, weigh hexamethylenetetramine according to the molar ratio of nitrogen atom to titanium atom being 0.5, and then add hexamethylenetetramine to the above solution to obtain A solution;

[0060] (2) Prepare B solution: add glacial acetic acid and high-purity water to absolute ethanol, maintain the volume ratio of glacial acetic acid: high-purity water: absolute ethanol as 2: 1: 8, and then weigh it according to the molar ratio of vanadium atoms and titanium atoms to 0.003 Get ammonium metavanadate, add in the above-mentioned solution that is prepared by glacial acetic acid, high-purity wa...

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Abstract

The invention discloses preparation and use methods of a nitrogen -vanadium co-doped modified titanium dioxide catalyst, belonging to the technical field of preparation and use of catalysts. The preparation method comprises the following steps of: adding a nitrogen source and a vanadium source in a process of preparing titanium dioxide by using a sol-gel method; hydrolyzing the mixture to obtain gelatin and standing, aging and drying to form particles; then grinding and carbonizing and heating to 600 to 800 DEG C for roasting to obtain a mixed crystal type titanium dioxide catalyst with different doping amounts. The compounding of electron-hole pair is influenced by doping metal ions to improve utilization ratios of visible light.With simple operation and easy control, the prepared nitrogen -vanadium co-doped modified titanium dioxide catalyst can achieve greatly improved visible light activity and can be applied to sulphuric acid production in the chemical engineering industry, SO2 tail gas treatment in the smelting industry, sulfur dioxide control of coal-fired and fuel boilers, acid rain prevention and control, smoke gas adjustment of coal-fired power plants, improvement on the dust removal efficiency of an electric precipitator, and other fields.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation and use, and in particular relates to a preparation and use method of a modified titanium dioxide catalyst co-doped with nitrogen and vanadium. Background technique [0002] With the rapid development of my country's chemical fertilizers, titanium dioxide, hydrofluoric acid, citric acid and other acid-consuming industries, the sulfuric acid industry is also developing rapidly. Due to technical reasons in the production of sulfuric acid, SO 2 Not fully oxidized to SO 3 Absorbed into sulfuric acid, the emission contains SO 2 Exhaust gas, resulting in the problem of sulfuric acid industry polluting the atmospheric environment. Since my country successfully developed vanadium catalysts in 1951 and used them in the production of sulfuric acid, a series of low-temperature vanadium catalysts, arsenic-resistant vanadium catalysts and wide-temperature vanadium catalysts have been developed ...

Claims

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Application Information

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IPC IPC(8): B01J27/24C01B17/79
Inventor 王淑勤赵毅郝丽香
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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