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Method for preparing black alpha-Bi2O3 powder material

A powder material, -bi2o3 technology, applied in chemical instruments and methods, inorganic chemistry, bismuth compounds, etc., can solve problems such as low utilization of light waves, and achieve the effects of short synthesis cycle and simple and feasible preparation process.

Inactive Publication Date: 2017-02-08
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

α-Bi has been reported 2 o 3 The absorption edge is 450-470nm, the appearance color is yellow, and the utilization rate of light waves is extremely low [Mater. Lett., 2011, pp988-990]

Method used

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  • Method for preparing black alpha-Bi2O3 powder material
  • Method for preparing black alpha-Bi2O3 powder material
  • Method for preparing black alpha-Bi2O3 powder material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) Yellow α-Bi 2 o 3 Synthesis of powder materials

[0017] Put 1g of bismuth nitrate pentahydrate in a muffle furnace at 500°C for 6 hours, cool naturally and grind to obtain yellow α-Bi 2 o 3 powder material;

[0018] (2) Black α-Bi 2 o 3 Synthesis of powder materials

[0019] 0.04g of the yellow α-Bi obtained in step (1) 2 o 3 Put the powder material in a reaction vessel, add 100mL deionized water and 0.4g hydrogen peroxide, and irradiate with a mercury lamp with a power of 300W for 1 hour under the condition of magnetic stirring. Dry at 80°C for 150 minutes to obtain the target product black α-Bi 2 o 3 powder material.

Embodiment 2

[0021] (1) Yellow α-Bi 2 o 3 Synthesis of powder materials

[0022] Put 1g of bismuth nitrate pentahydrate in a muffle furnace at 500°C for 6 hours, cool naturally and grind to obtain yellow α-Bi 2 o 3 powder material;

[0023] (2) Black α-Bi 2 o 3 Synthesis of powder materials

[0024] 0.2g of the yellow α-Bi obtained in step (1) 2 o 3 Put the powder material in a reaction vessel, add 100mL deionized water and 1g hydrogen peroxide, and irradiate with a mercury lamp with a power of 300W for 1 hour under the condition of magnetic stirring. Dry at ℃ for 180 minutes to obtain the target product black α-Bi 2 o 3 powder material.

Embodiment 3

[0026] (1) Yellow α-Bi 2 o 3 Synthesis of powder materials

[0027] Put 1g of bismuth nitrate pentahydrate in a muffle furnace at 500°C for 6 hours, cool naturally and grind to obtain yellow α-Bi 2 o 3 powder material;

[0028] (2) Black α-Bi 2 o 3 Synthesis of powder materials

[0029] 0.04g of the yellow α-Bi obtained in step (1) 2 o 3 Put the powder material in a reaction vessel, add deionized water and 0.68g hydrogen peroxide, irradiate with a mercury lamp with a power of 300W for 1 hour under the condition of magnetic stirring, pour off the upper clear night after standing, and place the precipitate in a drying oven at 100 ℃ drying for 120 minutes to obtain the target product black α-Bi 2 o 3 powder material.

[0030] The present invention adopts a novel preparation process, in yellow α-Bi 2 o 3 Hydrogen peroxide is added to the powder material and deionized water. Under the action of hydrogen peroxide, oxygen vacancies are generated in the process of mercury...

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Abstract

The invention discloses a method for preparing a black alpha-Bi2O3 powder material and belongs to the technical field of synthesis of photoelectric materials. According to the key points of the technical scheme of the invention, the method comprises the following steps: maintaining the temperature of bismuth nitrate pentahydrate in a muffle furnace to be 500 DEG C for 6 hours, naturally cooling, grinding, thereby obtaining a yellow alpha-Bi2O3 powder material; adding the obtained yellow alpha-Bi2O3 powder material into a reaction container, adding deionized water and hydrogen peroxide, irradiating by using a mercury lamp with the power of 300W under the magnetic stirring condition for an hour, standing, pouring the supernatant liquor, and drying the precipitate in a drying oven, thereby obtaining the target product, namely the black alpha-Bi2O3 powder material. According to the method disclosed by the invention, the preparation process is simple and feasible, the synthesis period is short, and the prepared black alpha-Bi2O3 powder material has the absorption edge of 1902nm, has the optical wave utilization rate higher than that of the yellow alpha-Bi2O3 material, and has potential application values in the photoelectric material aspect.

Description

technical field [0001] The invention belongs to the technical field of synthesis of photoelectric materials, in particular to a method for preparing black α-Bi 2 o 3 Method for powder materials. Background technique [0002] my country is rich in bismuth resources. In recent years, the annual output can reach more than 6,000 tons, and it is widely used. Bi 2 o 3 As a product of deep processing of bismuth source, it is an advanced functional material. Ferroelectric materials [J.Eur.Ceram.Soc., 2014, pp102-108], photocatalytic materials [Ceram. Int., 2016, pp2013-2020], photoelectric materials and sensors have important applications, and more and more Many people began to pay attention to α-Bi 2 o 3 . α-Bi has been reported 2 o 3 The absorption edge is 450-470nm, the appearance color is yellow, and the utilization rate of light waves is extremely low [Mater. Lett., 2011, pp988-990]. Therefore, it is necessary to design an α-Bi that can effectively improve the utiliz...

Claims

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Application Information

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IPC IPC(8): C01G29/00
CPCC01G29/00C01P2002/72C01P2002/80C01P2004/03C01P2006/60
Inventor 尚军陈秋艳
Owner HENAN NORMAL UNIV
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