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A Rapid Synthesis of Block-shaped Ag4V2O7 Photocatalyst

A photocatalyst, block-shaped technology, applied in chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve the problems of high preparation temperature and uneven product size, and achieve stable chemical properties and product Consistent quality and mild conditions

Active Publication Date: 2019-01-04
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Zhang Huizhong prepared Ag by solid phase method and precipitation combined with calcination method 4 V 2 o 7 , but the preparation temperature is slightly higher, and the size of the obtained product is not uniform

Method used

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  • A Rapid Synthesis of Block-shaped Ag4V2O7 Photocatalyst
  • A Rapid Synthesis of Block-shaped Ag4V2O7 Photocatalyst
  • A Rapid Synthesis of Block-shaped Ag4V2O7 Photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Add 0.04g of citric acid to 20mL of 0.1mol / L vanadium pentoxide (V 2 o 5 ) aqueous solution, magnetically stirred at 90° C. for 2 h, cooled to room temperature, and mixed solution A was obtained.

[0029] (2) Mix 60mL of 0.3mol / L silver nitrate (AgNO 3 ) solution was added dropwise into the mixed solution A, and magnetically stirred for 2 h to obtain the mixed solution B.

[0030] (3) Use 0.1mol / L ammonia water to adjust the pH value of the mixed solution B to 12, then stir it magnetically for 4 hours, and conduct a microwave hydrothermal reaction at 80°C and 600W for 120 minutes. After the reaction, filter the reaction solution to obtain a precipitate. After the precipitate was filtered, it was centrifuged and washed with distilled water and ethanol, and dried in an oven at 70 °C to obtain a square Ag 4 V 2 o 7 catalyst of light.

Embodiment 2

[0032] (1) Add 0.03g of citric acid to 20mL of 0.1mol / L vanadium pentoxide (V 2 o 5 ) aqueous solution, magnetically stirred at 80° C. for 2 h, cooled to room temperature, and mixed solution A was obtained.

[0033] (2) Mix 60mL of 0.3mol / L silver nitrate (AgNO 3 ) solution was added dropwise into the mixed solution A, and magnetically stirred for 2 h to obtain the mixed solution B.

[0034] (3) Use 0.2 mol / L ammonia water to adjust the pH value of the mixed solution B to 9, then magnetically stir for 4 hours, microwave hydrothermal reaction at 95°C and 500W for 90 minutes, after the reaction, filter the reaction solution to obtain a precipitate, and the obtained After the precipitate was filtered, it was centrifuged and washed with distilled water and ethanol, and dried in an oven at 70 °C to obtain a square Ag 4 V 2 o 7 catalyst of light.

[0035] see figure 1 , through the XRD diffraction pattern, it can be clearly seen that the present invention prepares pure phase ...

Embodiment 3

[0039] (1) Add 0.02g of citric acid to 20mL of 0.1mol / L vanadium pentoxide (V 2 o 5 ) aqueous solution, magnetically stirred at 70° C. for 2 h, cooled to room temperature, and mixed solution A was obtained.

[0040] (2) Mix 60mL of 0.3mol / L silver nitrate (AgNO 3 ) solution was added dropwise into the mixed solution A, and magnetically stirred for 2 h to obtain the mixed solution B.

[0041] (3) Use 0.3 mol / L ammonia water to adjust the pH value of the mixed solution B to 6, then magnetically stir for 4 hours, microwave hydrothermal reaction at 105°C and 400W for 60 minutes, after the reaction, filter the reaction solution to obtain a precipitate, and the obtained After the precipitate was filtered, it was centrifuged and washed with distilled water and ethanol, and dried in an oven at 70 °C to obtain a square Ag 4 V 2 o 7 catalyst of light.

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Abstract

A method for rapidly synthesizing square-shaped Ag4V2O7 nanophotocatalysts. Ag4V2O7 is synthesized using a precipitation-assisted microwave hydrothermal method. The preparation method includes: adding silver nitrate (AgNO3) to citric acid and pentanoic acid with a concentration of 0.1 to 0.3 mol / L. In the mixed solution of vanadium oxide (V2O5), use ammonia to adjust the pH value to 3 to 12, and then heat treat it at 80 to 120°C for 0.5 to 2 hours. The obtained precipitate was filtered, washed with distilled water and absolute ethanol, and dried in a vacuum drying oven at 40 to 80°C. The pure phase Ag4V2O7 is obtained with uniform chemical composition, high purity, large specific surface area, and improved photocatalytic performance of the material.

Description

technical field [0001] The invention belongs to the field of preparation of inorganic materials, relates to the preparation and application of semiconductor nanomaterials, in particular to a rapid synthesis of square Ag 4 V 2 o 7 photocatalytic method. Background technique [0002] In recent years, silver vanadate materials have been widely used in rechargeable high-energy-density lithium-ion batteries and photocatalysts driven by visible light due to their excellent electrochemical and photocatalytic properties. Among the silver vanadate series compounds, except for α-AgVO 3 , β-AgVO 3 , Ag 3 VO 4 Other than that, Ag 4 V 2 o 7 It is also a kind of visible photocatalyst with good application prospects, currently targeting Ag 4 V 2 o 7 research is still very little. [0003] Ag 4 V 2 o 7 At present, the main preparation methods include hydrothermal method, solid phase method, high temperature calcination method and so on. With the assistance of PVP and CTAB a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/68B01J37/34
CPCB01J23/682B01J37/346B01J35/39B01J35/61B01J35/40
Inventor 黄剑锋赵肖肖曹丽云李嘉胤冯亮亮白喆周磊李妍
Owner SHAANXI UNIV OF SCI & TECH