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Preparation method of nitrogen-doped rod-shaped niobium pentoxide photocatalyst

A technology of niobium pentoxide and photocatalyst, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of low utilization rate of sunlight, achieve low catalytic activity, improve light The effect of improving conversion efficiency and expanding the application range

Inactive Publication Date: 2015-11-25
NANTONG AGRI COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is mainly to solve the problem of low utilization rate of sunlight and the serious recombination of photogenerated electron-hole pairs in the body of niobium pentoxide photocatalyst, improve the catalytic activity of photocatalyst, and expand the application range of photocatalyst

Method used

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Examples

Experimental program
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Effect test

specific Embodiment 1

[0012] A preparation method of nitrogen-doped rod-shaped niobium pentoxide photocatalyst, comprising the following steps:

[0013] 1) Preparation of rod-shaped niobium pentoxide, using Nb 2 o 5 NR means

[0014] Dissolve 0.2g of metal niobium powder in 80mL of deionized water, stir at 1000rpm for 30min, transfer the above solution to a 100mL autoclave, age at 200°C for 7 days, filter to obtain the product, and then use deionized The mixture of water and ethanol was washed 2-3 times, filtered, and dried at 60°C for 1 hour to obtain the product Nb 2 o 5 NR;

[0015] 2) Preparation of nitrogen-doped rod-shaped niobium pentoxide, using N-Nb 2 o 5 NR means

[0016] The above steps are prepared to obtain Nb 2 o 5 Mix NR and urea at a mass ratio of 1:1, grind them evenly with a mortar, and calcinate the obtained sample at 400°C for 2 hours, wash the obtained sample with dilute nitric acid and deionized water, filter it with suction, and then dry it in an oven at 70°C Dry fo...

specific Embodiment 2

[0017] A preparation method of nitrogen-doped rod-shaped niobium pentoxide photocatalyst, comprising the following steps:

[0018] 1) Preparation of rod-shaped niobium pentoxide, using Nb 2 o 5 NR means

[0019] Dissolve 0.4g of metal niobium powder in 80mL of deionized water, stir at 1000rpm for 30min, transfer the above solution to a 100mL autoclave, age at 200°C for 7 days, filter to obtain the product, and then use deionized The mixture of water and ethanol was washed 2-3 times, filtered, and dried at 60°C for 1 hour to obtain the product Nb 2 o 5 NR, ready for use;

[0020] 2) Preparation of nitrogen-doped rod-shaped niobium pentoxide, using N-Nb 2 o 5 NR means

[0021] The above steps are prepared to obtain Nb 2 o 5 Mix NR and urea at a mass ratio of 2:1, grind them evenly with a mortar, calcinate the obtained sample at 400°C for 2 hours, wash the obtained sample with dilute nitric acid and deionized water, filter it with suction, and then dry it in an oven at 7...

specific Embodiment 3

[0022] A preparation method of nitrogen-doped rod-shaped niobium pentoxide photocatalyst, comprising the following steps:

[0023] 1) Preparation of rod-shaped niobium pentoxide, using Nb 2 o 5 NR means

[0024] Dissolve 0.6g of metal niobium powder in 80mL of deionized water, stir at 1000rpm for 30min, transfer the above solution to a 100mL autoclave, age at 200°C for 7 days, filter to obtain the product, and then use deionized The mixture of water and ethanol was washed 2-3 times, filtered, and dried at 60°C for 1 hour to obtain the product Nb 2 o 5 NR, ready for use;

[0025] 2) Preparation of nitrogen-doped rod-shaped niobium pentoxide, using N-Nb 2 o 5 NR means

[0026] The above steps are prepared to obtain Nb 2 o 5 Mix NR and urea at a mass ratio of 3:1, grind them evenly with a mortar, calcinate the obtained sample at 400°C for 2 hours, wash the obtained sample with dilute nitric acid and deionized water, filter it with suction, and then dry it in an oven at 7...

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Abstract

The invention discloses a preparation method of a rodlike N-doped niobium pentoxide photocatalyst. The preparation method comprises the steps of preparing rodlike niobium pentoxide; and preparing the rodlike N-doped niobium pentoxide photocatalyst. According to the preparation method, metal niobium powder and urea are used as raw materials to prepare the rodlike N-doped niobium pentoxide photocatalyst. The preparation method can remarkably improve the photocatalytic activity of the niobium pentoxide, effectively enhance the sunlight utilization rate of the niobium pentoxide and further widen the application range of theniobium pentoxide photocatalyst. The rodlike N-doped niobium pentoxide photocatalyst can rapidly and effectively mineralize organic pollutants in water into CO2 and H2O, has high repeating utilization rate, has good application prospect and economic benefit and achieves an environment-friendly effect.

Description

technical field [0001] The invention relates to the field of semiconductor photocatalyst preparation, in particular to a method for preparing a nitrogen-doped rod-shaped niobium pentoxide photocatalyst. Background technique [0002] With the development of the economy, the energy crisis is becoming more and more serious: the consumption of petrochemical energy, the pollution of air and water resources, etc. have become the bottleneck of sustainable development. Imminent task. Photocatalysis has attracted much attention due to its clean, efficient, and safe properties. [0003] Since Fujishima discovered semiconductor TiO in 1972 2 Since water can be split by photoelectric catalysis, the study of semiconductor photocatalytic materials has become a hot spot for scientists. Recently, niobium pentoxide (Nb 2 o 5 ) as a typical n-type semiconductor photocatalyst has received great attention. However, due to the small specific surface area of ​​niobium pentoxide nanoparticle...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J35/10C02F1/30
Inventor 丁敏娟李亚蒋云霞李蓉金洁蓉闫生荣
Owner NANTONG AGRI COLLEGE
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