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Method for template-free hydrothermal synthesis of one-dimensional nano-Bi2Fe4O9

A bi2fe4o9, hydrothermal synthesis technology, applied in chemical instruments and methods, inorganic chemistry, iron compounds, etc., can solve the problems of harsh experimental environment, high reaction temperature, and precise control of reaction pH, achieving feasibility and controllability good effect

Inactive Publication Date: 2010-09-15
山东产研陶瓷研究院有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Now about Bi 2 Fe 4 o 9 The report of preparation is still rare, and some Bi prepared by hydrothermal method 2 Fe 4 o 9 The experimental environment is relatively harsh
In 2006, Han Jiantao of Fudan University and others prepared Bi by hydrothermal method at 270 °C. 2 Fe 4 o 9 , but the reaction conditions are very harsh, and the reaction pH needs to be precisely controlled[7]
In the same year, Zhi Yang et al. used the sol-gel method to prepare Bi on the AAO template. 2 Fe 4 o 9 Nanowires, but the required reaction time is longer and the reaction temperature is higher[8]

Method used

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  • Method for template-free hydrothermal synthesis of one-dimensional nano-Bi2Fe4O9
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  • Method for template-free hydrothermal synthesis of one-dimensional nano-Bi2Fe4O9

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Effect test

Embodiment 1

[0029] Bi(NO 3 ) 3 ·5H 2 O (1.94 g) and Fe (NO 3 ) 3 9H 2 O (1.616 g) was dissolved in 0.1 normal concentration of nitric acid, then titrated with 12 mol / L NaOH solution until the precipitation was complete, then filtered and washed with water until the solution was neutral, and the Na in it was also washed away. + and NO 3 -. The precipitate that is obtained is dissolved in the NaOH solution that concentration is 8 mol / liter, is made into 40 milliliters of solutions; Bi(NO 3 ) 3 ·5H 2 The concentration of O is 100 mmol / L, Fe(NO 3 ) 3 9H 2 The concentration of O is 100 mmol / L, quickly pour it into a 50 ml reaction kettle and add a titanium sheet, place it in an oven at 160°C for 72 hours, take out the titanium sheet and rinse it with deionized water and alcohol, and put it in an oven at 60°C After 4 hours, the final product obtained on the titanium sheet is one-dimensional nano-Bi 2 Fe 4 o 9 crystals.

Embodiment 2

[0031] Equivalent amount of Bi(NO 3 ) 3 ·5H 2 O (970 mg) and Fe (NO 3 ) 3 9H 2 O (808 mg) was dissolved in dilute nitric acid of 0.1 normal concentration, then titrated with 12 mol / L of NaOH until the precipitation was complete, then filtered and washed with water until the solution was neutral, and the Na was also washed away. + and NO 3 - . The precipitate obtained is dissolved in a NaOH solution with a concentration of 20 mol / liter to make 40 milliliters of solution, Bi(NO 3 ) 3 ·5H 2 The concentration of O is 50 mmol / L, Fe(NO 3 ) 3 9H 2 The concentration of O is 50 mmol / L, quickly pour it into a 50 ml reaction kettle and add a titanium sheet, place it in an oven at 180°C for 50 hours, take out the titanium sheet and rinse it with deionized water and alcohol, and put it in an oven at 100°C After 2 hours, the final product obtained on the titanium sheet is highly oriented growth nanosheet Bi 2 Fe 4 o 9 . Flake Bi 2 Fe 4 o 9 One-dimensional nano-Bi growth ...

Embodiment 3

[0033] Equivalent amount of Bi(NO 3 ) 3 ·5H 2 O (232.8 mg) and Fe (NO 3 ) 3 9H 2 O (193.9 mg) was dissolved in 0.1 normal concentration of dilute nitric acid, then titrated with 12 mol / L of NaOH until the precipitation was complete, then filtered and washed with water until the solution was neutral, and the Na was also washed away. + and NO 3 - . The precipitate that is obtained is dissolved in the NaOH solution that concentration is 12 mol / liter, is made into 40 milliliters of solutions, Bi(NO 3 ) 3 ·5H 2 The concentration of O is 12 mmol / L, Fe(NO 3 ) 3 9H 2 The concentration of O is 12 mmol / L, quickly pour it into a 50 ml reaction kettle and add a titanium sheet, place it in an oven at 220°C for 50 hours, take out the titanium sheet and rinse it with deionized water and alcohol, and put it in an oven at 80°C After 4 hours, the final product obtained on the titanium sheet is highly oriented growth nanosheet Bi 2 Fe 4 o 9 . Flake Bi 2 Fe 4 o 9 One-dimension...

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Abstract

The invention discloses a method for template-free hydrothermal synthesis of one-dimensional nano-Bi2Fe4O9. In the method, a hydrothermal preparation method is adopted and comprises the following steps of: dissolving Bi(NO3)3.5H2O and Fe(NO3)3.9H2O with the same amount in dilute nitric acid; and titrating by using the aqueous solution of NaOH for complete precipitation, and filtering and washing to obtain neutral solution; and the method is characterized by comprising the following steps of: dissolving the obtained precipitate into the solution of NaOH at the concentration of 8 to 20 Mol / L; putting the solution into a reaction kettle and adding a titanium plate, reacting for at the temperature of between 160 and 200 DEG C 12 to 72 hours, and growing the product on a titanium plate substrate; and after taking the titanium plate out, washing the titanium plate by using deionized water and alcohol, putting the titanium plate into a drying oven for drying, and obtaining the final product of the one-dimensional nano-Bi2Fe4O9 on the titanium plate.

Description

technical field [0001] The invention relates to a method for synthesizing one-dimensional nano-Bi by using a titanium template hydrothermal method 2 Fe 4 o 9 method, especially involving the hydrothermal synthesis of one-dimensional nano-Bi 2 Fe 4 o 9 Methods. It belongs to the category of nanometer ferroelectric technology. Background technique [0002] The performance of functional materials has a great relationship with its shape, size, microstructure and crystal structure. The control of microscopic morphology is not only useful for the basic research of materials, but also has great value for the application of materials [1-4]. Bi 2 Fe 4 o 9 It is an excellent gas-sensing material and an important catalyst for industrial ammonia oxidation to NO, and its application value is very huge [5-6]. Now about Bi 2 Fe 4 o 9 The report of preparation is still rare, and some Bi prepared by hydrothermal method 2 Fe 4 o 9 The experimental environment is relatively ha...

Claims

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Application Information

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IPC IPC(8): C01G49/00
Inventor 陈文孙华君王一擘周静朱泉峣徐庆张成勇王瑞兵
Owner 山东产研陶瓷研究院有限公司
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