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Method for preparing bismuth trioxide nanowires by using solid-phase chemical reaction

A solid-phase chemical reaction, bismuth trioxide technology, applied in chemical instruments and methods, inorganic chemistry, nanotechnology and other directions, can solve the problems of high cost, poor thermal stability of materials, complex synthesis process, etc., and achieve high product yield. , the preparation method is simple, the effect of broad application prospects

Inactive Publication Date: 2013-12-25
XINJIANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the synthesis methods of industrial bismuth trioxide mainly include thermal decomposition method and neutralization precipitation method. At present, the methods for successfully synthesizing nano-scale bismuth trioxide mainly include microemulsion method, hydrothermal synthesis method, sol-gel method, Electrochemical oxidation method, etc., these methods have complicated synthesis process, high cost, and poor thermal stability of materials

Method used

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  • Method for preparing bismuth trioxide nanowires by using solid-phase chemical reaction
  • Method for preparing bismuth trioxide nanowires by using solid-phase chemical reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Accurately weigh 0.01 mol of bismuth nitrate and 0.02 mol of oxalic acid in different mortars, grind them separately and mix them evenly. After mixing, grind them quickly. As the grinding progresses, the mixture turns into a white paste. Continue grinding for 30 minutes to ensure sufficient reaction conduct. The precursor was placed in a muffle furnace, raised to 300°C at a rate of 10°C / min, and calcined at this temperature for 30 minutes. The obtained sample was washed with deionized water and dried at room temperature to obtain bismuth trioxide nanowires.

Embodiment 2

[0015] Accurately weigh 0.01 mol of bismuth nitrate and 0.03 mol of sodium oxalate in different mortars, grind them separately and mix them evenly. After mixing, grind quickly. As the grinding progresses, the mixture turns into a white paste. Continue grinding for 30 min to ensure the reaction is complete. fully carried out. The precursor was placed in a muffle furnace, raised to 300°C at a rate of 8°C / min, and calcined at this temperature for 30 minutes. The obtained sample was washed with deionized water and dried at room temperature to obtain bismuth trioxide nanowires.

Embodiment 3

[0017] Accurately weigh 0.01 mol of bismuth nitrate and 0.02 mol of ammonium oxalate in different mortars, grind them separately and mix them evenly. After mixing, grind them quickly. As the grinding progresses, the mixture turns into a white paste. Continue grinding for 30 minutes to ensure the smoothness of the reaction. fully carried out. The precursor was placed in a muffle furnace, raised to 300°C at a rate of 10°C / min, and calcined at this temperature for 30 minutes. The obtained sample was washed with deionized water and dried at room temperature to obtain bismuth trioxide nanowires.

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Abstract

The invention aims at providing a method for preparing bismuth trioxide nanowires. In the method, by employing cheap raw materials and a simple operation method, the bismuth trioxide nanowires are prepared by a solid-phase chemical reaction. Bismuth nitrate and oxalic acid or an oxalate are taken as reactants and are grinded at room temperature for synthesis of a precursor, and the precursor is subjected to thermolysis for preparation of the bismuth trioxide nanowires. According to the method of the invention, based on the solid-phase chemical reaction, the bismuth trioxide nanometer material can be prepared by employing the cheap raw materials and performing simple grinding and proper heat treatment. The method of the invention has the characteristics of being simple, high in product yield, environment friendly, easily available in batch production, and the like, and thus the method has extremely wide application prospect.

Description

technical field [0001] The invention relates to a method for preparing bismuth trioxide nanowires through solid phase chemical reaction. Background technique [0002] Bismuth trioxide is a yellow solid. It is an important functional material and mainly exists in four crystal forms of α, β, γ and δ. They have different crystal structures, at temperatures below 710°C, monoclinic α-Bi 2 o 3 The crystal is relatively stable, and the δ-Bi of the cubic structure is higher than this temperature 2 o 3 It is stable and remains until its melting point of 824°C. These two phases are stable forms of bismuth oxide. δ-Bi 2 o 3 The structure is similar to that of fluorspar, in which the oxygen vacancies are distributed irregularly. Due to the high mobility of oxygen ions in it, this phase exhibits high ionic conductivity. β-Bi in the tetragonal phase exists at 650°C 2 o 3 . It is believed to have and δ-Bi 2 o 3 The same arrangement of oxygen vacancies. At 639°C, γ-Bi with b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G29/00B82Y40/00
Inventor 曹亚丽汪洋贾殿赠
Owner XINJIANG UNIVERSITY
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