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Method for preparing high catalytic activity sodium tantalate photo-catalyst by hydro-thermal method

A high catalytic activity, photocatalyst technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of long reaction cycle, large powder particle size, Complicated preparation process and other issues to achieve good photocatalytic performance

Inactive Publication Date: 2012-07-11
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional preparation methods include solid-phase sintering method, sol-gel method, etc., but the powder obtained by these methods has a large particle size, the preparation process is complicated, and the reaction cycle is long.

Method used

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  • Method for preparing high catalytic activity sodium tantalate photo-catalyst by hydro-thermal method
  • Method for preparing high catalytic activity sodium tantalate photo-catalyst by hydro-thermal method
  • Method for preparing high catalytic activity sodium tantalate photo-catalyst by hydro-thermal method

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Experimental program
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Effect test

Embodiment 1

[0024] Step 1: Take Ta 2 o 5 (tantalum oxide), NaOH, add water to prepare a mixed solution, in which Ta 2 o 5 The concentration is 0.1mol / L, and the NaOH concentration is 1.0mol / L;

[0025] Step 2: Ultrasonic dispersion to completely dissolve NaOH, Ta 2 o 5 Dispersed into the solution to form a precursor;

[0026] Step 3: Put the precursor solution obtained in step 2 into the polytetrafluoroethylene lining with a filling rate of 80%, put the lining into the reaction kettle, seal the reaction kettle, and put it into a DHG type electric heating constant temperature blast drying oven , set the reaction temperature to 140°C, and stop the reaction after 12 hours of reaction time;

[0027] Step 4: After the reaction temperature drops to room temperature, take out the reaction kettle, pour out the supernatant in the lining, collect the precipitate, wash the precipitate with deionized water until it is neutral, and then wash it with absolute ethanol. Dry at 60°C to obtain sodiu...

Embodiment 2

[0031] Step 1: Take Ta 2 o 5 , NaOH, add water to prepare a mixed solution, in which Ta 2 o 5 The concentration is 0.1mol / L, and the NaOH concentration is 0.4mol / L;

[0032] Step 2: Ultrasonic dispersion to completely dissolve NaOH, Ta 2 o 5 Dispersed into the solution to form a precursor;

[0033] Step 3: Put the precursor solution obtained in step 2 into the polytetrafluoroethylene lining with a filling rate of 80%, put the lining into the reaction kettle, seal the reaction kettle, and put it into a DHG type electric heating constant temperature blast drying oven , set the reaction temperature to 120°C, and stop the reaction after 12 hours of reaction time;

[0034] Step 4: After the reaction temperature drops to room temperature, take out the reaction kettle, pour out the supernatant in the lining, collect the precipitate, wash the precipitate with deionized water until it is neutral, and then wash it with absolute ethanol. Dry at 60°C to obtain sodium tantalate powd...

Embodiment 3

[0036] Step 1: Take Ta 2 o 5 , NaOH, add water to prepare a mixed solution, in which Ta 2 o 5 The concentration is 0.1mol / L, and the NaOH concentration is 2.0mol / L;

[0037] Step 2: Ultrasonic dispersion to completely dissolve NaOH, Ta 2 o 5 Dispersed into the solution to form a precursor;

[0038] Step 3: Put the precursor solution obtained in step 2 into the polytetrafluoroethylene lining with a filling rate of 80%, put the lining into the reaction kettle, seal the reaction kettle, and put it into a DHG type electric heating constant temperature blast drying oven , set the reaction temperature to 180°C, and stop the reaction after 12 hours of reaction time;

[0039] Step 4: After the reaction temperature drops to room temperature, take out the reaction kettle, pour out the supernatant in the lining, collect the precipitate, wash the precipitate with deionized water until it is neutral, and then wash it with absolute ethanol. Dry at 60°C to obtain sodium tantalate powd...

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Abstract

The invention provides a method for preparing sodium tantalate photo-catalyst powder by hydro-thermal method. The method comprises the following steps: using tantalum oxide and sodium hydroxide as raw material, adding water, preparing into solution, stirring fully in order to completely dissolve NaOH, dispersing Ta2O5 into the solution to form precursor solution, arranging the precursor solution into a reaction kettle, reacting at 120-180 DEG C for 12h by hydro-thermal method, cooling after the reaction is finished, taking the precipitate out of the reaction kettle, rinsing into neutrality with de-ionized water and anhydrous ethanol, and drying at constant temperature of 60 DEG C to obtain powder; carrying out photo-catalyzing reaction to the powder with rhodamine B as degradation material, wherein the degradation rate of rhodamine B is higher than 94 percent after 210min under the irradiation of ultraviolet light. The reaction temperature of the invention is low, that is about 140 degrees; and the prepared powder has good photo catalytic activity under the irradiation of ultraviolet light at 140 DEG C.

Description

technical field [0001] The invention belongs to the field of functional materials, and relates to a method for preparing a sodium tantalate photocatalyst by a hydrothermal method. Background technique [0002] With the development of industry, the pollution and damage brought by human production practice to the earth's environment are becoming more and more serious, and the control and treatment of environmental pollution has become a major worldwide problem. Since 1972, Fjishima A and Honda K of the University of Tokyo reported that the n-type semiconductor TiO 2 Photodecomposition of H on a single crystal electrode 2 O produces H 2 and O 2 Since then, the research on the application of photocatalysis in environmental protection and governance has been extensively developed. TiO 2 Due to its excellent photocatalytic performance, low cost, and non-toxicity, researchers have paid attention to it. However, this photocatalyst still has some shortcomings, such as low utiliz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/20C01G35/00
Inventor 谈国强章薇
Owner SHAANXI UNIV OF SCI & TECH
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