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Preparation of one-dimensional nanotubular Ag/AgCl/AgBr composite heterojunction visible light catalyst and application thereof

A composite heterojunction, photocatalyst technology, applied in catalyst activation/preparation, physical/chemical process catalyst, nanotechnology, etc., can solve the problem of less research on one-dimensional structure, and achieve easy and efficient photocatalytic performance of equipment and materials , improve the effect of photocatalytic activity

Inactive Publication Date: 2018-05-25
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the predecessors were mainly engaged in the study of zero-dimensional materials, and little research was done on materials with one-dimensional structures.
[0004] After searching, it has not been used at home and abroad to use copper nanowires as a template and silver nitrate as a silver source to prepare one-dimensional hollow silver nanotubes. By adding ferric chloride hexahydrate and potassium bromide, a one-dimensional tubular structure is finally obtained. Ternary Ag / AgCl / AgBr catalyst

Method used

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  • Preparation of one-dimensional nanotubular Ag/AgCl/AgBr composite heterojunction visible light catalyst and application thereof
  • Preparation of one-dimensional nanotubular Ag/AgCl/AgBr composite heterojunction visible light catalyst and application thereof
  • Preparation of one-dimensional nanotubular Ag/AgCl/AgBr composite heterojunction visible light catalyst and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Weigh 0.3g of copper nitrate trihydrate and dissolve it in 10mL of deionized water, and add it dropwise into a beaker containing 15mol / L 200mL sodium hydroxide solution, then slowly add 2mL of ethylenediamine and 0.5mL of hydrazine hydrate, and then place React in a water bath at 60°C for 2 hours, cool to room temperature, wash, centrifuge, collect, and dissolve the product in 100 mL of deionized water, and disperse it ultrasonically for 5 minutes. Finally, add 100mL of a solution containing 4g of PVP and 100mL of a solution containing 0.5g of silver nitrate, stir and react at room temperature for 2h, wash, centrifuge, collect, and dry in a vacuum oven at 60°C for 24h to obtain silver nanotubes.

Embodiment 2

[0030] Example 2 Weigh 0.05 g of silver nanotubes and 0.03 mg of PVP prepared in Example 1, add them into 50 mL of deionized water, and disperse them ultrasonically for 5 minutes. Prepare 30mL of 15.4mmol / L ferric chloride solution, add it to the above suspension, stir at room temperature for 2h, wash, centrifuge, collect, and dry in a vacuum oven at 60°C for 24h to obtain nanotube Ag / AgCl.

Embodiment 3

[0032] Weigh 0.05 g of Ag / AgCl and 0.03 g of PVP prepared in Example 2, add them into 50 mL of deionized water, and disperse by ultrasonic for 5 min. Weigh 41.5 mg of KBr and add it to the above solution, stir at room temperature for 2 hours, wash, centrifuge, collect, and dry in a vacuum oven at 60°C for 24 hours to obtain nanotube Ag / AgBr (by molar ratio, Br:Cl=10: 0,, the number is AB-0).

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Abstract

The invention belongs to the technical field of nanocomposite photocatalysis, and particularly relates to preparation of a one-dimensional nanotubular Ag / AgCl / AgBr composite heterojunction visible light catalyst and application thereof. In the invention, a copper nanowire template is obtained by a water bath method, silver nitrate is introduced, a reaction is performed to obtain a one-dimensionalsilver nanotube carrier with relatively good uniformity, and then ferric chloride hexahydrate and a certain amount of potassium bromide are added to obtain the one-dimensional nanotubular Ag / AgCl / AgBrcomposite heterojunction visible light catalyst through an ion exchange reaction. The one-dimensional three-component composite heterojunction photocatalyst adopting a tubular structure contains an inner layer surface and an outer layer surface, so that reactive sites are increased; the presence of heterojunctions greatly reduces the composite rate of photoelectron-hole pairs; under the conditionof visible light irradiation, the photocatalytic activity and the stability are greatly improved; the one-dimensional nanotubular Ag / AgCl / AgBr composite heterojunction visible light catalyst can degrade dye macromolecules effectively, and has a very good practical value in environmental protection fields such as wastewater treatment. The preparation method of the one-dimensional nanotubular Ag / AgCl / AgBr composite heterojunction visible light catalyst is easy to operate, mild in reaction condition, short in cycle and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of environment and inorganic photocatalytic materials, and in particular relates to a preparation method of a one-dimensional nanotube Ag / AgCl / AgBr composite heterojunction photocatalyst and its application to photocatalytically degrade dye wastewater. Background technique [0002] With the advancement and development of science and technology, the living standards of human beings are getting higher and higher, and the industrialization process of society is accelerating. A large amount of dye wastewater is discharged into the living environment, and dyes are almost difficult to self-degrade, and the problem of water pollution is becoming more and more serious. Seriously, the destruction of the ecological environment seriously threatens people's health. Therefore, finding an effective method to treat organic dye molecules in waste liquid has become an urgent problem to be solved, and semiconductor photocatal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/10B01J37/10B01J37/16B01J37/34B82Y30/00B82Y40/00C02F1/30C02F101/34C02F101/36C02F101/38C02F101/30
CPCB82Y30/00B82Y40/00C02F1/30B01J27/10B01J37/0009B01J37/10B01J37/16B01J37/343C02F2305/10C02F2101/308C02F2101/34C02F2101/38C02F2101/36B01J35/39
Inventor 于岩肖俊祺
Owner FUZHOU UNIV
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