Bismuth germanate nanometer powder preparation method

A nano-powder, bismuth germanate technology, applied in chemical instruments and methods, bismuth compounds, inorganic chemistry, etc., can solve the problems of difficulty in obtaining nano-powder, long time required for ball milling, low production efficiency, etc. The effect of uneven sintering mixing, widening the light response range, and low equipment requirements

Inactive Publication Date: 2006-07-26
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the ball milling method takes a long time and the production efficiency is low
The bigger disadvantage is that it is difficult to obtain high-purity Bi 12 GeO 20 Nano powde...

Method used

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  • Bismuth germanate nanometer powder preparation method
  • Bismuth germanate nanometer powder preparation method
  • Bismuth germanate nanometer powder preparation method

Examples

Experimental program
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Embodiment 1

[0030] 0.12mol bismuth nitrate pentahydrate (Bi(NO 3 ) 3 ·5H 2 O) dissolved in 180ml glacial acetic acid (CH 3 COOH), then dropwise added 0.01mol tetraethoxygermanium ((C 2 h 5 O) 4 Ge), while adding 60ml ethylene glycol dimethyl ether (CH 3 OCH 2 CH 2 OH) as a co-solvent to adjust the viscosity of the solution, fully stirred to form a uniform sol. The aforementioned sol was evaporated and dried at 150° C. to obtain a precursor powder. The resulting precursor powder was sintered at 650 °C under normal pressure for 0.8 hours to obtain Bi 12 GeO 20 Nano powder.

Embodiment 2

[0032] 0.12mol bismuth nitrate (Bi(NO 3 ) 3 ) dissolved in 30ml of anhydrous acetone (CH 3 COCH 3 ), and then dropwise added 0.01mol tetramethoxygermanium ((CH 2 O) 4 Ge), while adding 15ml diethylene glycol dimethyl ether (CH 3 OCH 2 CH 2 ) 2 O was used as a co-solvent to adjust the viscosity of the solution, and it was fully stirred to form a uniform sol. The aforementioned sol was evaporated and dried at 350° C. to obtain a precursor powder. The resulting precursor powder was sintered at 750 °C under normal pressure for 0.5 hours to obtain Bi 12 GeO 20 Nano powder.

Embodiment 3

[0034] 0.12mol bismuth acetate (Bi(CH 3 COO) 3 ) dissolved in 100ml absolute ethanol (CH 3 CH 2 OH), and then add 0.01mol germanium nitrate (Ge(NO 3 ) 4 ), and stirred thoroughly to form a homogeneous sol. The aforementioned sol was evaporated and dried at 100° C. to obtain a precursor powder. The resulting precursor powder was sintered at 450 °C under normal pressure for 4 hours to obtain Bi 12 GeO 20 Nano powder.

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Abstract

The invention relates to a preparation method for nano bismuth germanate powder, which comprises: dissolving the bismuth salt into organic solvent with concentration as 0. 5~5M/L; adding Ge-contained compound by mole ratio to bismuth as 1: 12 into the solution; stirring and forming even sol; evaporating on normal or negative pressure to the sol to obtain the dried precursor powder; finally, sintering the powder on aerobic environment to obtain the final product. This invention needs low temperature and short time to prepare the Bi12GeO20 powder with high-efficient photocatalysis activation.

Description

technical field [0001] The present invention relates to a kind of bismuth germanate (Bi 12 GeO 20 ) nano powder preparation method, the prepared bismuth germanate nano powder can be used as a photocatalyst, and belongs to the technical field of material science photocatalyst. Background technique [0002] Bismuth germanate (Bi 12 GeO 20 ) is a typical soft bismuthite-type crystal compound, which belongs to the cubic crystal system and I23 point group. It has photoelectric, electro-optic, fluorescent, magneto-optic, optical rotation and piezoelectric properties, especially its excellent photoelectric and electro-optic properties, which make it have extremely broad application prospects in the fields of optoelectronics, photorefraction, and optical information processing materials. [0003] The traditional solid-state reaction sintering method can be used to prepare Bi 12 GeO 20 Powder, namely by Bi 2 o 3 and GeO 2 The powder is mixed and prepared by solid-phase react...

Claims

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Application Information

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IPC IPC(8): C01G29/00B01J23/18
Inventor 顾明元贺持缓
Owner SHANGHAI JIAO TONG UNIV
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