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A kind of preparation method of 3d flower spherical zinc pyrovanadate photocatalyst

A technology of zinc pyrovanadate and photocatalyst, which is applied in the direction of chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc. Many problems, to achieve the effect of high purity, large amount of synthesis, and small investment

Active Publication Date: 2018-08-24
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve technical problems such as long reaction time in the preparation process of zinc pyrovanadate in the prior art, many additives, complicated operation, and many impurities in the product, the purpose of the present invention is to provide a preparation method of a 3D flower spherical zinc pyrovanadate photocatalyst , which is prepared by direct current electrolysis, and zinc pyrovanadates with different structures and particle sizes are prepared by controlling the current density, electrolyte concentration and temperature

Method used

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  • A kind of preparation method of 3d flower spherical zinc pyrovanadate photocatalyst
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  • A kind of preparation method of 3d flower spherical zinc pyrovanadate photocatalyst

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Embodiment 1

[0030] A preparation method of a 3D flower spherical zinc pyrovanadate photocatalyst, specifically comprising the steps of:

[0031] (1), with zinc sheet as anode, glassy carbon electrode as cathode, 0.1mol / L sodium metavanadate aqueous solution as anolyte, 0.1mol / L hydrochloric acid solution as catholyte, and a cationic membrane as diaphragm In the chamber electrolyzer, the constant current electrolysis is carried out at a temperature of 70°C, and the current density is 10mA / cm 2 ;

[0032] (2), after the electrolysis, the product obtained on the anode is filtered while washing with deionized water, so that the Na + Clean it up, then dry the filtered filter cake at 90°C for 4 hours, and cool it down to room temperature naturally after drying to get zinc pyrovanadate powder.

[0033] Adopt the Hitachi S-3400N type scanning electron microscope to carry out the morphology characterization of the zinc pyrovanadate obtained above, its SEM picture is as follows figure 1 shown, f...

Embodiment 2

[0035] A preparation method of a 3D flower spherical zinc pyrovanadate photocatalyst, specifically comprising the steps of:

[0036] (1), with the zinc sheet as the anode, the titanium mesh as the cathode, the aqueous solution of 0.2mol / L sodium metavanadate as the anolyte, the 0.2mol / L sodium chloride solution as the catholyte, and the cationic membrane as the diaphragm In the double-chamber electrolyzer, the constant current electrolysis is carried out at a temperature of 50°C, and the current density is 50mA / cm 2 ;

[0037] (2), after the electrolysis, the product obtained on the anode is filtered while washing with deionized water, so that the Na + Clean it up, then dry the filtered filter cake at 80°C for 5 hours, and cool it down to room temperature naturally after drying to get zinc pyrovanadate powder.

[0038] Adopt the Hitachi S-3400N type scanning electron microscope to carry out the morphology characterization of the zinc pyrovanadate obtained above, its SEM pict...

Embodiment 3

[0040] A preparation method of a 3D flower spherical zinc pyrovanadate photocatalyst, specifically comprising the steps of:

[0041] (1) Using zinc sheet as anode, titanium mesh as cathode, 0.3mol / L sodium metavanadate aqueous solution as anolyte, 0.3mol / L hydrochloric acid solution as catholyte, and double chamber with cationic membrane as diaphragm In the electrolytic cell, the constant current electrolysis is carried out at a temperature of 20°C, and the current density is 20mA / cm 2 ;

[0042] (2), after the electrolysis, the product obtained on the anode is filtered while washing with deionized water, so that the Na + Clean it up, then dry the filtered filter cake at 60°C for 6 hours, and cool it down to room temperature naturally after drying to get zinc pyrovanadate powder.

[0043] Adopt the Hitachi S-3400N type scanning electron microscope to carry out the morphology characterization of the zinc pyrovanadate obtained above, its SEM picture is as follows image 3 sho...

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Abstract

The invention discloses a preparation method of a 3D spherical zinc pyrovanadate photocatalyst. The present invention adopts direct current electrolysis to prepare zinc pyrovanadate with different structures and particle sizes by controlling current density, electrolyte concentration and temperature, and its composition is Zn3V2O7(OH)2·2H2O. The method of the invention is simple to operate, convenient to control, the product is easy to collect, and the morphology of the obtained product is a three-dimensional micron flower ball structure composed of intersecting nanosheets.

Description

technical field [0001] The invention belongs to the technical field of inorganic photocatalytic materials, and in particular relates to zinc pyrovanadate, specifically a method for preparing a 3D flower spherical zinc pyrovanadate photocatalyst. Background technique [0002] With the rapid development of global industry, environmental pollution has become increasingly prominent and has become the number one issue affecting social development and human health. In recent years, the application potential of nano-semiconductor photocatalyst technology in the field of environmental governance has attracted a lot of scientific research attention, and related research results are not uncommon. 3D hierarchical structures have attracted extensive attention due to their special properties and potential applications in many fields. The study found that the hierarchical structure can provide more reactive sites in the photocatalytic reaction because of its higher specific surface area,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/00B01J23/22
CPCC25B1/00B01J23/22B01J35/39
Inventor 张全生张立恒张道明任桢霍孟飞周敦凡李富强马占虎
Owner SHANGHAI INST OF TECH