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A kind of preparation method of iron-loaded nanbo3 perovskite photocatalyst

A perovskite-type, photocatalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of easy recombination of photons and holes, etc. Achieve the effect of increasing specific surface area, increasing active sites, and easy availability of raw materials

Inactive Publication Date: 2019-05-28
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] To solve NaNbO 3 For the problem that the photons and holes generated during the photocatalytic reaction are easy to recombine, the present invention provides an iron-loaded NaNbO 3 Perovskite-type photocatalyst, which effectively solves the problem of easy recombination of photons and holes generated during the photocatalytic reaction process by loading Fe, and greatly improves its photocatalytic performance

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  • A kind of preparation method of iron-loaded nanbo3 perovskite photocatalyst
  • A kind of preparation method of iron-loaded nanbo3 perovskite photocatalyst
  • A kind of preparation method of iron-loaded nanbo3 perovskite photocatalyst

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Embodiment 1

[0022] An iron-loaded NaNbO 3 The preparation method of perovskite type photocatalyst comprises the steps:

[0023] Step 1, hydrothermal synthesis of NaNbO 3 Perovskite oxide: 0.2g of Nb 2 o 5 Add 60 mL of NaOH solution with a concentration of 8 mol / L and perform magnetic stirring until a white suspension is formed; place the formed suspension in a 100 mL polytetrafluoroethylene reactor for thermal reaction at 130°C for 6 hours, and cool to room temperature; Transfer the obtained product into a beaker, wash it with absolute ethanol for 3 times, put it in a drying oven and dry it at 80°C for 12 hours to obtain a block solid; put the block solid in a crucible and calcinate it at 300°C for 8 hours, then grind it , to get NaNbO 3 Perovskite oxides;

[0024] Step 2, preparation of iron-loaded NaNbO 3 Perovskite photocatalyst: 0.0389g of Fe(NO 3 ) 3 9H 2 O was dissolved in 25mL of absolute ethanol to make an ethanol solution of ferric nitrate; the 0.3g NaNbO obtained in ste...

Embodiment 2

[0026] An iron-loaded NaNbO 3 The preparation method of perovskite type photocatalyst comprises the steps:

[0027] Step 1, hydrothermal synthesis of NaNbO 3 Perovskite oxide: 0.2g of Nb 2 o 5 Add 60mL of NaOH solution with a concentration of 10mol / L and stir magnetically until a white suspension is formed; place the formed suspension in a 100mL polytetrafluoroethylene reactor for heat reaction at 150°C for 8h, cool to room temperature; Transfer the obtained product into a beaker, wash it with absolute ethanol for 5 times, put it in a drying oven and dry it at 110°C for 10 hours to obtain a block solid; put the block solid in a crucible, calcinate it at 500°C for 6 hours, and then grind it , to get NaNbO 3 Perovskite oxides;

[0028] Step 2, preparation of iron-loaded NaNbO 3 Perovskite photocatalyst: 0.0821g of Fe(NO 3 ) 3 9H 2 O was dissolved in 25mL of absolute ethanol to make an ethanol solution of ferric nitrate; the 0.3g NaNbO obtained in step 1 3 Add the perov...

Embodiment 3

[0030] An iron-loaded NaNbO 3 The preparation method of perovskite type photocatalyst comprises the steps:

[0031] Step 1, hydrothermal synthesis of NaNbO 3 Perovskite oxide: 0.2g of Nb 2 o 5 Add 60 mL of NaOH solution with a concentration of 10 mol / L and perform magnetic stirring until a white suspension is formed; place the formed suspension in a 100 mL polytetrafluoroethylene reactor for thermal reaction at 150°C for 7 hours, and cool to room temperature; Transfer the obtained product into a beaker, wash it with absolute ethanol for 4 times, put it in a drying oven and dry it at 90°C for 12 hours to obtain a block solid; put the block solid in a crucible, calcinate it at 300°C for 7 hours, and then grind it , to get NaNbO 3 Perovskite oxides;

[0032] Step 2, preparation of iron-loaded NaNbO 3 Perovskite photocatalyst: 0.1848g of Fe(NO 3 ) 3 9H 2 O was dissolved in 25mL of absolute ethanol to make an ethanol solution of ferric nitrate; the 0.3g NaNbO obtained in ste...

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Abstract

The invention discloses a preparation method of an iron-loaded NaNbO3 perovskite photocatalyst. The method comprises the following steps: synthesizing NaNbO3 perovskite oxide by a hydrothermal method, adding the NaNbO3 perovskite oxide to an ethanol solution of Fe(NO3)3.9H2O; evaporating ethanol; carrying out high-temperature calcination; obtaining the iron-loaded NaNbO3 perovskite photocatalyst after grinding. The iron-loaded NaNbO3 perovskite photocatalyst disclosed by the invention is simple in preparation method, readily available in raw materials, low in cost and free of pollution to the environment, and the obtained iron-loaded NaNbO3 perovskite photocatalyst can effectively solve the problem of easy compounding of photons and holes of NaNbO3 in a light-catalyzed reaction process, furthermore, iron loading increases the specific surface area of a catalyst to increase active sites on the surface of the catalyst so as to greatly improve the photocatalytic efficiency of the catalyst.

Description

technical field [0001] The invention relates to an iron-loaded NaNbO 3 The invention discloses a method for preparing a perovskite photocatalyst, belonging to the field of photocatalysts. Background technique [0002] With the development of industry, the energy crisis and environmental crisis are becoming more and more serious, and the development of photocatalytic technology provides a solution to these two problems. Using semiconductor materials as catalysts, using solar energy to photocatalytically oxidize toxic and harmful organic substances has been one of the hot topics in research in the past two decades. At present, TiO, which has stable structure, optical and chemical properties and is non-toxic, is more commonly used. 2 . However, the traditional photocatalytic material TiO 2 It has a large band gap (~3.2eV), only responds to ultraviolet light, and is difficult to recycle, which limits its application range. Therefore, people have been working hard to find new...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/847A62D3/17A62D101/26A62D101/28
CPCA62D3/17A62D2101/26A62D2101/28B01J23/002B01J23/8474B01J35/004
Inventor 杨汉培崔素珍傅小飞涂艳梅聂坤孙慧华高照郭润强朱鸿宇
Owner HOHAI UNIV