Preparation method of niobium (V) pentoxide urchin-like nano sphere and application of nano sphere as photocatalyst

A technology of niobium pentoxide and nano microspheres, which is applied in the field of nanomaterials and catalysts, and achieves the effects of low cost, low reaction temperature and good repeatability

Active Publication Date: 2016-03-09
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Nanopowder (CN101700910, a method for preparing spherical nanoscale niobium pentoxide powder), hollow nanospheres (CN101746826B, a method for preparing nanohollow spheres of niobium pentoxide) and nanow

Method used

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  • Preparation method of niobium (V) pentoxide urchin-like nano sphere and application of nano sphere as photocatalyst
  • Preparation method of niobium (V) pentoxide urchin-like nano sphere and application of nano sphere as photocatalyst
  • Preparation method of niobium (V) pentoxide urchin-like nano sphere and application of nano sphere as photocatalyst

Examples

Experimental program
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Embodiment 1

[0021] A preparation method for preparing niobium pentoxide sea urchin-shaped nano-microspheres, comprising the steps of:

[0022] At room temperature (10-40°C), 1.5g of ammonium niobium oxalate was dissolved in 70ml of ethanol and aqueous solution with a volume ratio of 1:1, ultrasonicated for 10 minutes, and magnetically stirred for 0.5 hours to form a clear and transparent solution, and then the solution was transferred to In a 100ml polytetrafluoroethylene-lined reactor, conduct a hydrothermal reaction at 180°C for 24 hours. After cooling to room temperature, filter with filter paper, wash with 2000-3000ml of distilled water, and then wash with absolute ethanol. The filtrate was dried at 100° C. for 8 hours to obtain sea urchin-shaped niobium pentoxide nanospheres.

[0023] figure 1 For the X-ray diffraction pattern of the sea urchin-like niobium pentoxide nano-microspheres prepared in Example 1, the 2θ values ​​are 22.7°, 28.5°, 36.6°, 46.3°, 50.8°, 55.2°, 56.2°, 58.6° ...

Embodiment 2

[0028] A preparation method for preparing niobium pentoxide sea urchin-shaped nano-microspheres, comprising the steps of:

[0029] At room temperature (10-40°C), 1.5g of ammonium niobium oxalate was dissolved in 70ml of ethanol and aqueous solution with a volume ratio of 1:4, ultrasonicated for 10 minutes, and magnetically stirred for 0.5 hours to form a clear and transparent solution, and then the solution was transferred to In a 100ml polytetrafluoroethylene-lined reactor, conduct a hydrothermal reaction at 180°C for 24 hours. After cooling to room temperature, filter with filter paper, wash with 2000-3000ml of distilled water, and then wash with absolute ethanol. The filtrate was dried at 100° C. for 8 hours to obtain sea urchin-shaped niobium pentoxide nanospheres.

Embodiment 3

[0031] A preparation method for preparing niobium pentoxide sea urchin-shaped nano-microspheres, comprising the steps of:

[0032] At room temperature (10-40°C), 1.5g of ammonium niobium oxalate was dissolved in 70ml of propanol and aqueous solution with a volume ratio of 1:2, ultrasonicated for 10 minutes, and magnetically stirred for 0.5 hours to form a clear and transparent solution, and then the solution was transferred to In a 100ml polytetrafluoroethylene-lined reactor, conduct a hydrothermal reaction at 180°C for 24 hours. After cooling to room temperature, filter with filter paper, wash with 2000-3000ml of distilled water, and then wash with absolute ethanol. The filtrate was dried at 100° C. for 8 hours to obtain sea urchin-shaped niobium pentoxide nanospheres.

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Abstract

The invention relates to a preparation method of a niobium (V) pentoxide urchin-like nano sphere and an application of the nano sphere as a photocatalyst. The preparation method comprises the following steps: step one, weighing alcohol and deionized water according to a volume ratio of 20:1 to 1:100 at a room temperature, mixing water and alcohol, and stirring to prepare an alcohol solution; step two, weighing soluble niobium salt, dissolving the soluble niobium salt into the alcohol solution obtained in the step one, and stirring for 0.5 to 5 hours to obtain a transparent solution; step three, transferring the obtained transparent solution to a hydrothermal reactor, wherein the transparent solution accounts for 50 to 70% of the total volume of the reactor, and the hydrothermal reactions are performed at a temperature of 100 to 220 DEG C, after reactions, naturally cooling the reactor to the room temperature, and washing and drying the reaction products to obtain the niobium (V) pentoxide urchin-like nano spheres. According to the preparation method, alcohol is used to adjust the polarity of the solution so as to adjust the growth speed of niobium, and thus niobium (V) pentoxide urchin-like nano spheres, which have uniform morphology and controllable diameters, are obtained. The prepared niobium (V) pentoxide urchin-like nano spheres has a high catalytic activity on degrading dyes in water in the presence of visible light.

Description

technical field [0001] The invention belongs to the field of nanomaterials and catalysts, and in particular relates to a preparation method of niobium pentoxide sea urchin-shaped nano microspheres and their application as photocatalysts. Background technique [0002] It is an important way to solve the current global environmental degradation and energy crisis by making full use of sunlight to effectively degrade toxic organic pollutants through photocatalysis. Among them, the heterogeneous catalytic photocatalytic process using semiconductor oxides as catalysts can realize the direct use of sunlight at room temperature to mineralize almost all organic pollutants without secondary pollution, and has attracted the attention of researchers from various countries. In semiconductor catalysts, Nb 2 o 5 Although it is a wide bandgap oxide (3.2-4.0eV), Nb 2 o 5 It has the advantages of acid and alkali resistance, light corrosion resistance, etc., and has attracted the attention...

Claims

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Application Information

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IPC IPC(8): C01G33/00B01J23/20B01J35/08
Inventor 陈俊利张永辉韩莉锋绪连彩巩飞龙方少明李明玉
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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