A method for preparing nano-bi by precipitation and calcination 2 zr 2 o 7 powder method

A powder and nanotechnology, applied in the field of material preparation, can solve the problems of long cycle, complicated preparation process, high energy consumption, etc., and achieve the effect of low cost, simple process and uniform size

Active Publication Date: 2018-02-06
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of this method is complex, high energy consumption and long period

Method used

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  • A method for preparing nano-bi by precipitation and calcination <sub>2</sub> zr <sub>2</sub> o <sub>7</sub> powder method
  • A method for preparing nano-bi by precipitation and calcination <sub>2</sub> zr <sub>2</sub> o <sub>7</sub> powder method
  • A method for preparing nano-bi by precipitation and calcination <sub>2</sub> zr <sub>2</sub> o <sub>7</sub> powder method

Examples

Experimental program
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Effect test

Embodiment 1

[0023] A kind of preparation nano Bi by precipitation calcining method 2 Zr 2 o 7 The method of powder, comprises the following steps:

[0024] 1) Bi(NO 3 ) 3 ·5H 2 O:Zr(NO 3 ) 4 ·5H 2 O=1:1 Weigh the analytically pure Bi(NO 3 ) 3 ·5H 2 O and Zr(NO 3 ) 4 ·5H 2 O in a beaker, dissolved Bi(NO 3 ) 3 ·5H 2 O, dissolving Zr(NO in deionized water 3 ) 4 ·5H 2 O. After stirring for a certain period of time, mix the two to prepare Bi 3+ Precursor solution A with a concentration of 0.025mol / L.

[0025] 2) Place the obtained precursor solution A on a magnetic stirrer, slowly add concentrated ammonia water dropwise to adjust its pH=10.00, during the adjustment process, white precipitates are continuously produced, stir for 2 hours, make it fully mixed, and obtain precipitation solution B.

[0026] 3) Use suction filtration to separate and wash out the precipitate and impurities in the precipitate solution B to obtain a white precipitate C.

[0027] 4) Place the obta...

Embodiment 2

[0030] A kind of preparation nano Bi by precipitation calcining method 2 Zr 2 o 7 The method of powder, comprises the following steps:

[0031] 1) Bi(NO 3 )3 ·5H 2 O:Zr(NO 3 ) 4 ·5H 2 O=1:1 Weigh the analytically pure Bi(NO 3 ) 3 ·5H 2 O and Zr(NO 3 ) 4 ·5H 2 O in a beaker, dissolved Bi(NO 3 ) 3 ·5H 2 O, dissolving Zr(NO in deionized water 3 ) 4 ·5H 2 O. After stirring for a certain period of time, mix the two to prepare Bi 3+ Precursor solution A with a concentration of 0.03mol / L.

[0032] 2) Place the obtained precursor solution A on a magnetic stirrer, slowly add concentrated ammonia water dropwise to adjust its pH=10.00, during the adjustment process, white precipitates are continuously produced, stir for 2 hours, make it fully mixed, and obtain precipitation solution B.

[0033] 3) Use suction filtration to separate and wash out the precipitate and impurities in the precipitate solution B to obtain a white precipitate C.

[0034] 4) Place the obtaine...

Embodiment 3

[0037] A kind of preparation nano Bi by precipitation calcining method 2 Zr 2 o 7 The method of powder, comprises the following steps:

[0038] 1) Bi(NO 3 ) 3 ·5H 2 O:Zr(NO 3 ) 4 ·5H 2 O=1:1 Weigh the analytically pure Bi(NO 3 ) 3 ·5H 2 O and Zr(NO 3 ) 4 ·5H 2 O in a beaker, dissolved Bi(NO 3 ) 3 ·5H 2 O, dissolving Zr(NO in deionized water 3 ) 4 ·5H 2 O. After stirring for a certain period of time, mix the two to prepare Bi 3+ Precursor solution A with a concentration of 0.05mol / L.

[0039] 2) Place the obtained precursor solution A on a magnetic stirrer, slowly add concentrated ammonia water dropwise to adjust its pH=7.00, during the adjustment process, white precipitates are continuously produced, stir for 3 hours, make it fully mixed, and obtain the precipitate solution B.

[0040] 3) Use suction filtration to separate and wash out the precipitate and impurities in the precipitate solution B to obtain a white precipitate C.

[0041] 4) Place the obta...

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Abstract

The invention discloses a preparation method for a nano-sized Bi2Zr2O7 powder by adopting a sedimentation-calcination process, belonging to the technical field of preparation of materials. The preparation method comprises the following steps: 1) taking Bi(NO3)3-5H2O and Zr(NO3)4-5H2O; 2) dissolving Bi(NO3)3-5H2O with concentrated nitric acid, dissolving Zr(NO3)4-5H2O with deionized water, and mixing two solutions obtained by respective dissolving so as to prepare a precursor solution A; 3) adjusting the pH value of the precursor solution A, carrying out uniform mixing under fully stirring so as to obtain a precipitation solution B, and carrying out vacuum filtering so as to prepare a white precipitate C; 4) drying the white precipitate C so as to prepare a block, and fully grinding the block so as to obtain a powder D; and 5) subjecting the powder D to heat treatment so as to prepare the nano-sized Bi2Zr2O7 powder. The method provided by the invention has simple process and convenient operation, is easier to realize uniform atomic-scale mixing in the process of precipitation, facilitates to promoting low-temperature synthesis of a material, and has short preparation period, low cost and broad development prospects. The method provided by the invention can prepare a Bi2Zr2O7 nano-sized material with uniform size, small particle size and good crystallinity.

Description

technical field [0001] The invention belongs to the technical field of material preparation, in particular to a method for preparing nano Bi by precipitation and calcination. 2 Zr 2 o 7 powder method. Background technique [0002] Bismuth zirconate (Bi 2 Zr 2 o 7 ) belongs to pyrochlore-type metal composite oxides. It is a new type of inorganic composite material with various properties such as ion conductivity, ferroelectricity, ferromagnetism, and photocatalysis. [Zeng Weiwei, Xiao Caimei, Chen Hongxia. Preparation and photocatalytic properties of pyrochlore-type composite oxides [J]. Chemical Intermediates, 2011, (4): 32-35.]. The general formula of a typical pyrochlore structure is A 2 B 2 o 7 , (wherein A and B are respectively +3 valence and +4 valence cations), belonging to the cubic center crystal system and belonging to the Fd3m space group, this structure can be considered to be composed of two kinds of cations with different radii (A 3+ , B 4+ ) and 1 / ...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C01G25/00B82Y30/00
CPCC01G25/00C01P2002/72C01P2004/03C01P2004/64
Inventor曹丽云罗艺佳周磊黄剑锋吴建鹏闫婧文李瑞梓
OwnerSHAANXI UNIV OF SCI & TECH