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Synthetic method for one-dimensional single crystal bismuth oxide nano material

A technology of nanomaterials and synthesis methods, which is applied in the field of liquid-phase synthesis of one-dimensional single-crystal bismuth oxide nanomaterials, can solve the problems of increased preparation costs and unavailability, and achieve the effects of easy control, no pollution, and simple equipment

Inactive Publication Date: 2010-06-09
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The common disadvantages of these methods are: gas phase synthesis is required at a higher temperature, which increases the preparation cost on the one hand, and on the other hand, the obtained bismuth oxide is in the β and σ phases, and the α phase that is stable at low temperature cannot be obtained.
However, so far, there has been no literature report on the preparation of one-dimensional single crystal nano-α-Bi by liquid phase method. 2 o 3

Method used

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  • Synthetic method for one-dimensional single crystal bismuth oxide nano material
  • Synthetic method for one-dimensional single crystal bismuth oxide nano material
  • Synthetic method for one-dimensional single crystal bismuth oxide nano material

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Weigh 0.1mmolα-Bi 2 o 3 Put the powder and 0.3mmol of potassium sulfate in a 23mL stainless steel pressure-resistant reactor, add 10mL of deionized water, and stir to disperse evenly. Seal the reaction kettle, react at 160°C for 24 hours, cool to room temperature, filter with funnel, and wash with deionized water to obtain a light yellow powder. The product was identified by X-ray powder diffraction as α-phase bismuth oxide having the same structure as the raw material. Scanning electron microscopy shows that the raw material is irregular micron-sized α-Bi 2 o 3 Particles, after being treated by the method described in Example 1, one-dimensional single crystal α-Bi with unique shape and relatively uniform size distribution can be obtained 2 o 3 nanomaterials( figure 2 ), and its length can reach tens of microns. In addition, the raw material α-Bi 2 o 3 The specific surface area is only 0.2m 2 g -1 , the specific surface area of ​​the product can be increased...

Embodiment 2

[0020] Weigh 0.5mmolα-Bi 2 o 3 Put the powder and 10mmol of potassium sulfate in a 23mL stainless steel pressure-resistant reactor, add 10mL of deionized water, and stir to disperse evenly. Seal the reaction kettle, react at 200° C. for 10 h, cool to room temperature, filter with funnel, and wash with deionized water to obtain light yellow powder. The product was identified as α-phase bismuth oxide by X-ray powder diffraction. Selected area electron diffraction of a single nanomaterial proves that the product is a single crystal with a width of about 50nm.

Embodiment 3

[0022] Weigh 10mmolα-Bi 2 o 3 Put the powder and 50mmol of magnesium sulfate in a 100mL stainless steel pressure-resistant reactor, add 30mL of deionized water, and stir to make it evenly dispersed. Seal the reaction kettle, react at 180° C. for 48 h, cool to room temperature, filter with funnel, wash with deionized water, and obtain a light yellow powder. The product was identified as α-phase bismuth oxide by X-ray powder diffraction. Scanning electron microscopy showed that the product was a one-dimensional single crystal α-Bi with unique shape and relatively uniform size distribution. 2 o 3 nanomaterials.

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Abstract

The invention relates to a method for compounding one dimension single crystal bismuth oxide nanometer material, which comprises the following procedures: (1) Alpha phase bismuth oxide is used as rawmaterial, a mineralizer is sulphate; the molar ratio of the Alpha phase bismuth oxide and the sulphate is 1 / 3-1 / 50; solvent is water; after deionized water is added, the concentration of the Alpha phase bismuth oxide raw material is 0.01M-1.0M; (2) after being dispersed evenly in the deionized water, the raw material and the mineralizer are put into a reaction kettle with a polyfluortetraethylenelining; (3) the reaction kettle is placed in an oven for 2-48 hours at the temperature of 110-200 DEG C for thermal insulation; then the reaction kettle is cooled to the room temperature; a hopper isused for suction filtering; after being washed by the deionized water, a flaxen one dimension single crystal Alpha-Bi2O3 nanometer material is obtained. The raw material of the method is cheap and easy to get; the equipment is simple; the operation is safe and reliable; the material is pollution-free to the environment; the product has the bigger specific surface; the productivity is high; the repetitiveness of the preparation technique is good.

Description

technical field [0001] The invention relates to a method for synthesizing one-dimensional single-crystal bismuth oxide nanomaterials in liquid phase, one-dimensional single-crystal α-Bi 2 o 3 The nanometer material belongs to the technical field of inorganic chemical industry. Background technique [0002] Bismuth oxide is an important functional material. It has four crystal forms of α, β, γ and σ, which belong to monoclinic structure, tetragonal structure, body-centered cubic structure and face-centered cubic structure respectively. Because its crystal structure contains a large amount of Oxygen vacancies have good oxygen ion conductivity, and can be used to make solid oxide fuel cell electrolytes, oxygen sensors, and high-purity oxygen generators. Recently, studies have shown that α-Bi 2 o 3 With good visible light catalytic activity, it has been widely used for photocatalytic degradation of organic chlorine pollutants, nitrite-containing wastewater, methyl orange dec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/16C30B29/60C30B7/10C01G29/00
Inventor 周莹顾冬红
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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