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A kind of method for preparing α-bismuth niobate photocatalyst

A photocatalyst, bismuth niobate technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as α-bismuth niobate that have not yet been seen, Achieve the effect of high catalytic degradation efficiency, wide adaptability and strong practicability

Active Publication Date: 2022-02-01
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the established preparation methods of α-bismuth niobate, there is no report on the one-step preparation of α-bismuth niobate by hydrothermal method

Method used

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  • A kind of method for preparing α-bismuth niobate photocatalyst
  • A kind of method for preparing α-bismuth niobate photocatalyst
  • A kind of method for preparing α-bismuth niobate photocatalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Step 1, preparation reaction solution, its specific steps are:

[0035] a, take by weighing niobium pentachloride (NbCl) that quality is 0.5403g 5 ), and bismuth nitrate pentahydrate (Bi(NO 3 ) 3 ·5H 2 O), the mol ratio of the two is 1:1;

[0036] b. Pour the niobium pentachloride weighed in step a into 10 mL of absolute ethanol, and stir magnetically for 20 minutes to fully dissolve the niobium pentachloride. The resulting solution is marked as solution A; Pour bismuth into 10mL of absolute ethanol, and stir magnetically for 20 minutes to fully dissolve bismuth nitrate pentahydrate, and the resulting solution is marked as B solution;

[0037] c. Slowly add the A solution obtained in step b into the B solution. During the dropwise addition, the solution gradually becomes clear from turbidity. Stir magnetically for 20 minutes to make a mixed solution; adjust and mix with 25% concentrated ammonia water The pH value of the solution was 8, and magnetically stirred for ...

Embodiment 2

[0046] Step 1, preparation reaction solution, its specific steps are:

[0047] a, take by weighing niobium pentachloride (NbCl) that quality is 0.5404g 5 ), and bismuth nitrate pentahydrate (Bi(NO 3 ) 3 ·5H 2 O), the mol ratio of the two is 1:1;

[0048] b. Pour the niobium pentachloride weighed in step a into 20 mL of absolute ethanol, and stir for 30 minutes with a magnetic stirrer to fully dissolve the niobium pentachloride, and the resulting solution is marked as solution A; in addition, the niobium pentachloride weighed in step a Pour bismuth nitrate pentahydrate into 20mL of absolute ethanol, and stir for 30min with a magnetic stirrer to fully dissolve bismuth nitrate pentahydrate, and mark the obtained solution as B solution;

[0049] c. Slowly add the A solution obtained in step b into the B solution. During the dropwise addition, the solution gradually becomes clear from turbidity. Stir magnetically for 30 minutes to make a mixed solution; adjust and mix with 26% co...

Embodiment 3

[0058] Step 1, preparation reaction solution, its specific steps are:

[0059] a, take by weighing niobium pentachloride (NbCl) that quality is 0.5406g 5 ), and bismuth nitrate pentahydrate (Bi(NO 3 ) 3 ·5H 2 O), the mol ratio of the two is 1:1;

[0060] b. Pour the niobium pentachloride weighed in step a into 30 mL of absolute ethanol, and stir for 40 minutes with a magnetic stirrer to fully dissolve the niobium pentachloride, and the resulting solution is marked as solution A; in addition, the niobium pentachloride weighed in step a Pour bismuth nitrate pentahydrate into 30 mL of absolute ethanol, and stir for 40 minutes with a magnetic stirrer to fully dissolve bismuth nitrate pentahydrate, and mark the obtained solution as B solution;

[0061] c. Slowly add the A solution obtained in step b into the B solution. During the dropwise addition, the solution gradually becomes clear from turbidity. Stir magnetically for 40 minutes to make a mixed solution; adjust and mix wit...

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Abstract

A method for preparing α-bismuth niobate photocatalyst, comprising the following steps: Step 1, preparing a reaction precursor solution; Step 2, transferring the reaction precursor solution obtained in step 1 to a 50mL hydrothermal reaction kettle, at 270°C At ~280°C hydrothermal temperature, react for 16-24 hours. After the reaction is completed, cool the hydrothermal reactor to room temperature naturally; step 3, filter the product obtained in step 2, wash it, and place it in a blast drying oven at 50 The α-bismuth niobate photocatalyst is obtained by drying at a temperature of °C to 60°C for 20 to 24 hours; the operation method is simple, and the obtained α-bismuth niobate photocatalyst has high purity, large specific surface area and strong catalytic activity.

Description

technical field [0001] The invention belongs to the technical field of photocatalyst preparation, and in particular relates to a method for preparing α-bismuth niobate photocatalyst. Background technique [0002] With the development of social economy and the improvement of people's living standards, human beings are facing increasingly severe environmental pollution. Many refractory organic pollutants enter the environmental system with the discharge of industrial and domestic wastewater, disturbing and threatening human beings and the entire biosphere. Among many wastewater treatment technologies, the heterogeneous photocatalytic process using semiconductor oxides as catalysts is considered to be a It is an ideal environmental pollution control technology. Therefore, the research and development of new semiconductor photocatalytic materials is the frontier in the field of environmental catalysis at home and abroad. [0003] Among a wide variety of photocatalytic materia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/20
Inventor 赵洁郭笑张晓龙姚秉华余晓皎宋强吴飞
Owner XIAN UNIV OF TECH
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