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Method for preparing sodium tantalate thin film by sol-gel process

A technology of sodium tantalate and thin film, which is applied in the field of preparing sodium tantalate thin film by sol-gel combined pulling method, which can solve the problems that the suspension is not easy to recycle, the catalyst and the suspension are difficult to separate, and it is suitable for large-scale application , Environmentally friendly, high purity effect

Active Publication Date: 2014-04-16
NANTONG XINBANG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, most studies are mainly focused on the use of suspended photocatalyst powder to control pollution. However, there are two main problems in the degradation of pollutants by powder-based photocatalysts: (1) after the photocatalytic reaction, the separation of the catalyst and the suspension More difficult; (2) suspension containing photocatalytic powder is not easy to recycle

Method used

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  • Method for preparing sodium tantalate thin film by sol-gel process
  • Method for preparing sodium tantalate thin film by sol-gel process

Examples

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Effect test

Embodiment 1

[0025] The method for preparing sodium tantalate film by sol-gel of the present invention includes the following steps:

[0026] Step 1: Take TaCl 5 , Citric acid and absolute ethanol are prepared into solution A, in which TaCl 5 The concentration is 0.057mol / L and the citric acid concentration is 0.286mol / L. Take sodium acetate and add water to prepare solution B, the concentration of sodium acetate is 0.4mol / L.

[0027] Step 2: The solution A obtained in step 1 is magnetically stirred at 50°C, and the solution B is magnetically stirred at room temperature to make TaCl 5 , Sodium acetate and citric acid are completely dissolved; mix solutions A and B at a volume ratio of 7:1 to form NaTaO with a total volume of 40mL 3 Precursor C;

[0028] Step 3: Choose a glass substrate as the substrate, and clean the cut glass substrate with acetone, absolute ethanol and distilled water for 10 minutes in sequence, and blow dry, and place the clean glass substrate in a UV irradiator for 20 minutes...

Embodiment 2

[0032] The method for preparing sodium tantalate film by sol-gel of the present invention includes the following steps:

[0033] Step 1: Take TaCl 5 , Citric acid and absolute ethanol are prepared into solution A, in which TaCl 5 The concentration is 0.057mol / L and the citric acid concentration is 0.286mol / L. Take sodium acetate and add water to prepare solution B, the sodium acetate concentration is 1.6mol / L.

[0034] Step 2: The solution A obtained in step 1 is magnetically stirred at 50°C, and the solution B is magnetically stirred at room temperature to make TaCl 5 , Sodium acetate and citric acid are completely dissolved; mix solutions A and B at a volume ratio of 7:1 to form NaTaO with a total volume of 40mL 3 Precursor C;

[0035] Step 3: Select a glass substrate as the substrate, and clean the cut glass substrate with acetone, absolute ethanol, and distilled water in sequence for 10 minutes, then blow dry, and place the clean glass substrate in an ultraviolet irradiator for 2...

Embodiment 3

[0039] The method for preparing sodium tantalate film by sol-gel of the present invention includes the following steps:

[0040] Step 1: Take TaCl 5 , Citric acid and absolute ethanol are prepared into solution A, in which TaCl 5 The concentration is 0.057mol / L and the citric acid concentration is 0.286mol / L. Take sodium acetate and add water to prepare solution B, the sodium acetate concentration is 1.2 mol / L.

[0041] Step 2: The solution A obtained in step 1 is magnetically stirred at 50°C, and the solution B is magnetically stirred at room temperature to make TaCl 5 , Sodium acetate and citric acid are completely dissolved; mix solutions A and B at a volume ratio of 7:1 to form NaTaO with a total volume of 40mL 3 Precursor C;

[0042] Step 3: Select a glass substrate as the substrate, and clean the cut glass substrate with acetone, absolute ethanol, and distilled water in sequence for 10 minutes, then blow dry, and place the clean glass substrate in an ultraviolet irradiator for ...

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Abstract

The invention provides a method for preparing a sodium tantalate thin film by a sol-gel process. The method comprises the following steps of: (1) adding absolute ethanol to tantalum pentachloride (TaCl5) and citric acid to prepare a solution A, and adding water to sodium acetate (CH3COONa) to prepare a solution B; (2) sufficiently stirring for dissolving TaCl5 and CH3COONa, and mixing the solutions A and B to form a NaTaO3 precursor solution; (3) respectively ultrasonically washing a cut glass substrate, blow-drying, and irradiating in an ultraviolet illumination instrument; (4) placing the treated glass substrate in the prepared NaTaO3 precursor solution, preparing a thin film by adopting a Czochralski method, and drying the thin film; and (5) pretreating at high temperature, and carrying out heat insulation to obtain the NaTaO3 thin film. According to the method, the pure-phase NaTaO3 thin film is prepared by combining the sol-gel process and the Czochralski method; and the obtained thin film has honeycomb-shaped surface, and is firmly combined with the substrate.

Description

Technical field [0001] The invention belongs to the field of functional materials and relates to a method for preparing a sodium tantalate film by a sol-gel combined pulling method. Background technique [0002] Since 1972, Fjishima A and Honda K of the University of Tokyo in Japan have reported on n-type semiconductor TiO 2 Photodecomposition H on single crystal electrode 2 O produces H 2 And O 2 Since then, semiconductor photocatalysis technology has attracted more and more attention as a new environmental treatment technology, and the activity and immobilization of photocatalysts are the decisive factors for the practicality of photocatalysis. At present, most researches mainly focus on the use of suspended photocatalyst powders to control pollution. However, there are two main problems in the degradation of pollutants by powder-based photocatalysts: (1) After the photocatalytic reaction, the catalyst is separated from the suspension More difficult; (2) The suspension containi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C17/22
Inventor 谈国强章薇
Owner NANTONG XINBANG CHEM