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Strontium titanate/bismuth molybdate heterojunction nanofiber photocatalyst as well as preparation method and application thereof

A nanofiber and photocatalyst technology, applied in the field of photocatalytic materials, achieves the effects of simple operation, no pollution to the environment, and improved separation efficiency

Pending Publication Date: 2021-10-29
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, strontium titanate / bismuth molybdate heterojunction nanofibers have not been reported as photocatalysts.

Method used

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  • Strontium titanate/bismuth molybdate heterojunction nanofiber photocatalyst as well as preparation method and application thereof
  • Strontium titanate/bismuth molybdate heterojunction nanofiber photocatalyst as well as preparation method and application thereof
  • Strontium titanate/bismuth molybdate heterojunction nanofiber photocatalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1 strontium titanate nanofiber photocatalyst

[0024] The preparation method is as follows

[0025] Mix 10mL DMF and 0.5mL nitric acid solution with a concentration of 65%, add 0.432g strontium carbonate and 1mL tetra-n-butyl titanate to the above mixed solution, and then add 0.8g PVP while stirring to obtain a precursor. Strontium carbonate / tetra-n-butyl titanate / PVP nanofibers are obtained by spinning;

[0026] Strontium carbonate / tetra-n-butyl titanate / PVP nanofibers were calcined under air conditions, the calcination temperature was 550°C, and the calcination time was 2 hours to obtain strontium titanate nanofiber photocatalysts, marked as SrTiO 3 .

Embodiment 2

[0027] Embodiment 2 bismuth molybdate nanosheet photocatalyst

[0028] The preparation method is as follows

[0029] Dissolve 0.1455g of bismuth nitrate pentahydrate and 0.036g of sodium molybdate into a mixed solution of 54mL of ethanol and 9mL of ethylene glycol, and use a hydrothermal method to prepare a bismuth molybdate nanosheet catalyst. The hydrothermal temperature is 160°C, and the hydrothermal time is 24h, the resulting photocatalyst was labeled as Bi 2 MoO 6 .

Embodiment 3

[0030] Example 3 Strontium titanate / bismuth molybdate heterojunction nanofiber photocatalyst

[0031] (1) The preparation method is as follows

[0032] Mix 10mL DMF and 0.5mL nitric acid solution with a concentration of 65%, add 0.432g strontium carbonate and 1mL tetra-n-butyl titanate to the above mixed solution, and then add 0.8g PVP while stirring to obtain a precursor. Strontium carbonate / tetra-n-butyl titanate / PVP nanofibers are obtained by spinning;

[0033] Calcining strontium carbonate / tetra-n-butyl titanate / PVP nanofibers under air conditions, the calcination temperature is 550°C, and the calcination time is 2 hours, to obtain strontium titanate nanofibers;

[0034] Dissolve 0.1455g of bismuth nitrate pentahydrate and 0.036g of sodium molybdate into a mixed solution of 54mL of ethanol and 9mL of ethylene glycol, then add 0.03g of strontium titanate nanofibers, and grow molybdenum on the surface of strontium titanate nanofibers by hydrothermal method The strontium ti...

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Abstract

The invention belongs to the technical field of photocatalytic materials, and relates to a strontium titanate / bismuth molybdate heterojunction nanofiber photocatalyst as well as a preparation method and application thereof. The preparation method comprises the following steps of: 1) adding strontium carbonate and tetra-n-butyl titanate into a mixed solution of DMF and nitric acid, then adding PVP while stirring to obtain a precursor, and obtaining strontium carbonate / tetra-n-butyl titanate / PVP nanofibers by utilizing an electrostatic spinning method; 2) calcining the strontium carbonate / tetra-n-butyl titanate / PVP nanofibers under an air condition, and naturally cooling to obtain strontium titanate nanofibers; and 3) dissolving bismuth nitrate pentahydrate and sodium molybdate into a mixed solution of ethanol and ethylene glycol, then adding the strontium titanate nanofibers, and growing bismuth molybdate nanosheets on the surface of the strontium titanate nanofibers by using a hydrothermal method to obtain the strontium titanate / bismuth molybdate heterojunction nanofiber photocatalyst. The formation of the heterojunction can greatly improve the photocatalytic activity of the strontium titanate.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials, and in particular relates to a photocatalyst of strontium titanate / bismuth molybdate heterojunction nanofibers and a preparation method and application thereof. Background technique [0002] In recent years, the energy crisis and environmental pollution have become the main issues of global concern. Among the many environmental purification methods, various environmental catalytic technologies such as photocatalysis and electrocatalysis have attracted much attention. In addition, in the atmosphere, the content of nitrogen is the highest, and its volume accounts for about 78% of the total volume of the atmosphere. For such abundant nitrogen resources, how to convert stable nitrogen into ammonia and make better use of it has become the focus of attention. The realization of artificial nitrogen fixation under mild conditions is a scientific problem to be solved. Photocatalytic tech...

Claims

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Application Information

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IPC IPC(8): B01J23/02B01J23/31B01J35/00B01J35/06B01J37/10C01C1/02B01D53/86B01D53/72
CPCB01J23/02B01J23/31B01J37/10C01C1/026B01D53/8668B01D2259/802B01J35/39B01J35/58Y02P20/52
Inventor 陶然李东珂韩宇范晓星
Owner LIAONING UNIVERSITY
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