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A quadrangular frustum flake bi 2 o 3 Nano single crystal and its preparation method

A nano-single crystal and flake-like technology, which is applied in the field of tetragonal lamella-shaped Bi2O3 nano-single crystals and its preparation, can solve the problems of nano-single crystals that have not been reported, large sample size differences, complex processes, etc., and achieve size distribution. The effect of narrow range, short reaction time and simple operation process

Active Publication Date: 2017-10-24
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Two-dimensional Bi 2 o 3 Nanosheets, but more raw materials are required, the process is complicated, and the size of the samples produced varies greatly
[0005] So far, tetragonal frustum flakes of Bi have been prepared by hydrothermal method. 2 o 3 The work of nano-single crystals has not been reported yet, and there are no patents or literature reports on the preparation of quadrangular truss flake-shaped Bi by hydrothermal method. 2 o 3 nano single crystal

Method used

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  • A quadrangular frustum flake bi <sub>2</sub> o <sub>3</sub> Nano single crystal and its preparation method
  • A quadrangular frustum flake bi <sub>2</sub> o <sub>3</sub> Nano single crystal and its preparation method
  • A quadrangular frustum flake bi <sub>2</sub> o <sub>3</sub> Nano single crystal and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Step 1, the Bi(NO 3 ) 3 ·5H 2 O was dissolved in 10mL deionized water and stirred evenly to obtain a bismuth salt solution with a concentration of 0.13mol / L; 4 VO 3 Dissolve in 10mL deionized water, stir evenly to obtain a vanadium salt solution with a concentration of 0.13mol / L;

[0031] Step 2, mix bismuth salt solution and vanadium salt solution according to the molar ratio of Bi:V=1:1 (bismuth salt solution and vanadium salt solution each 10mL), stir evenly, obtain 20mL mixed solution;

[0032] Step 3: Add 15 mL of NaOH with a concentration of 4 mol / L to 20 mL of the mixed solution, stir for 30 minutes, release ammonia gas, and obtain a precursor solution;

[0033] Step 4, add 3mL of distilled water to the precursor solution to make the volume of the precursor solution constant to 38mL;

[0034] Step 5, put the precursor solution after constant volume into the hydrothermal reaction kettle, ensure the filling rate of the hydrothermal reaction kettle is 80%, and ...

Embodiment 2

[0039] Step 1, the Bi(NO 3 ) 3 ·5H 2 O was dissolved in 10mL deionized water and stirred evenly to obtain a bismuth salt solution with a concentration of 0.1mol / L; 4 VO 3 Dissolve in 10mL deionized water, stir evenly to obtain a vanadium salt solution with a concentration of 0.1mol / L;

[0040] Step 2, mix bismuth salt solution and vanadium salt solution according to the molar ratio of Bi:V=1:1 (bismuth salt solution and vanadium salt solution each 10mL), stir evenly, obtain 20mL mixed solution;

[0041] Step 3: Add 12 mL of NaOH with a concentration of 4 mol / L to 20 mL of the mixed solution, stir for 25 minutes, release ammonia gas, and obtain a precursor solution;

[0042] Step 4, add 6mL of distilled water to the precursor solution to make the volume of the precursor solution constant to 38mL;

[0043] Step 5: Put the constant-volume precursor solution into the hydrothermal reaction kettle to ensure that the filling rate of the hydrothermal reaction kettle is 80%, and c...

Embodiment 3

[0046] Step 1, the Bi(NO 3 ) 3 ·5H 2 O was dissolved in 10mL deionized water and stirred evenly to obtain a bismuth salt solution with a concentration of 0.15mol / L; 4 VO 3 Dissolve in 10mL deionized water, stir evenly to obtain a vanadium salt solution with a concentration of 0.15mol / L;

[0047] Step 2, mix bismuth salt solution and vanadium salt solution according to the molar ratio of Bi:V=1:1 (bismuth salt solution and vanadium salt solution each 10mL), stir evenly, obtain 20mL mixed solution;

[0048] Step 3: Add 18 mL of NaOH with a concentration of 4 mol / L to 20 mL of the mixed solution, stir for 35 minutes, release ammonia gas, and obtain a precursor solution;

[0049] Step 4, add 0 mL of distilled water to the precursor solution to make the volume of the precursor solution constant to 38 mL;

[0050] Step 5: Put the constant-volume precursor solution into the hydrothermal reaction kettle to ensure that the filling rate of the hydrothermal reaction kettle is 80%, a...

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Abstract

The invention provides a quadrangular frustum lamellar Bi2O3 nano-single crystal and a preparation method thereof. The method includes: mixing a bismuth salt solution with a vanadium salt solution according to a mole ratio of 1:1, then adding a NaOH solution, carrying out stirring reaction at room temperature to release ammonia so as to obtain a precursor solution, then adding water into the precursor solution to a constant volume, finally subjecting the precursor solution to hydrothermal reaction, and at the end of the reaction, washing and drying the reaction product, thus obtaining the quadrangular frustum lamellar Bi2O3 nano-single crystal. According to the invention, by controlling the adding amount of the NaOH solution, the purpose of controlling the product shape can be reached, and the pure cubic phase quadrangular frustum lamellar Bi2O3 nano-single crystal growing along (111) crystal orientation can be prepared. The quadrangular frustum lamellar Bi2O3 nano-single crystal has good ionic conduction, hole conduction and photooxidation reaction potential. The method has the advantages of short reaction time, few procedure, simple operation process, mild reaction condition, low cost, and environmental friendliness, etc.

Description

technical field [0001] The invention belongs to the field of functional materials, and relates to a quadrangular truss flake-shaped Bi 2 o 3 Nano single crystal and its preparation method. Background technique [0002] The bismuth element is located in the V main group and the fifth period, and its common valence is +3. Thanks Bi 3+ 6s that are easily polarized and deformed and outside the electronic structure 2 Electron pairs do not participate in bonding, so 6s 2 Electron pairs are anisotropic. Bismuth-based compounds have properties such as ion conduction, ferroelectricity, ferromagnetism, superconductivity, and catalysis, among which pure-phase bismuth oxide has unique properties, such as high electrical conductivity, low energy band gap, high refractive index, and dielectric constant. It has a wide range of applications in the field of functional materials, such as electronic materials, electrolyte materials, high-temperature superconducting materials, and photoel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B7/10C30B29/16C30B29/64
Inventor 任慧君赵程程谈国强王勇许驰夏傲
Owner SHAANXI UNIV OF SCI & TECH