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Composite photocatalyst-DyVO4/g-C3N4 and preparation method thereof

A technology of g-c3n4 and catalyst is applied in the field of photocatalysis, which can solve the problems of low photocatalytic efficiency and enhanced catalytic effect of composite photocatalysts.

Inactive Publication Date: 2015-04-29
FUYANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a large number of experiments have proved that the photocatalytic efficiency of simply using a single substance as a photocatalyst is not high, while the catalytic effect of a composite photocatalyst is enhanced.

Method used

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  • Composite photocatalyst-DyVO4/g-C3N4 and preparation method thereof
  • Composite photocatalyst-DyVO4/g-C3N4 and preparation method thereof
  • Composite photocatalyst-DyVO4/g-C3N4 and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] The preparation (0.5%) of embodiment 1 composite photocatalyst

[0089] (1) Weigh 15.0g of melamine and put it into an alumina crucible (with a cover), place it in a muffle furnace, bake it at 500°C for 5h, and cool it down to room temperature naturally to obtain g-C 3 N 4 Sample, namely product I.

[0090] (2) Mix 2 mol of ammonium metavanadate and 1 mol of dysprosium nitrate, dissolve them in distilled water respectively, adjust the pH of the system to 8.0 with ammonia water after mixing the two solutions, and a yellow turbid substance is formed; after standing at room temperature for 1 hour, filter and put Vacuum oven at 80°C for 12h, then moved into an alumina crucible, placed in a muffle furnace and roasted at 400°C for 3h, cooled naturally to room temperature to obtain a light brown solid DyVO 4 , namely product II.

[0091] (3) Accurately weigh 0.0050g of product II and 0.9950g of product I, mix and grind in an agate mortar for 30 minutes, transfer to an alu...

Embodiment 2

[0092] The preparation (1%) of embodiment 2 composite photocatalysts

[0093] (1) Weigh 15.0g of urea into a dry and clean small beaker, dissolve it in 20mL of distilled water, and react at a constant temperature in a water bath at 60°C. After the solvent water is evaporated to dryness, put the obtained sample into an alumina crucible (covered ), placed in a muffle furnace, calcined at 400°C for 5h, and cooled naturally to room temperature to obtain g-C 3 N 4 Sample, namely product I.

[0094] (2) Mix 1 mol of ammonium metavanadate and 2 mol of dysprosium nitrate, dissolve them in distilled water respectively, adjust the pH of the system to 7.5 with ammonia water after mixing the two solutions, and a yellow turbid substance is formed; after standing at room temperature for 3 hours, filter and put Vacuum oven at 120°C for 10h, then moved into an alumina crucible, placed in a muffle furnace and roasted at 700°C for 3h, cooled naturally to room temperature to obtain a light b...

Embodiment 3

[0096] The preparation (2.5%) of embodiment 3 composite photocatalysts

[0097] (1) Weigh 15.0g of dicyandiamide and put it into an alumina crucible (covered), place it in a muffle furnace, roast it at 300°C for 4 hours, and cool it down to room temperature naturally to obtain g-C 3 N 4 Sample, namely Product I.

[0098] (2) Mix 1 mol of ammonium metavanadate and 1.5 mol of dysprosium nitrate, dissolve them in distilled water respectively, adjust the pH of the system to 6.5 with ammonia water after mixing the two solutions, and a yellow turbidity is generated; after standing at room temperature for 2 hours, filter and put Put it into a vacuum oven at 110°C for 18h, then move it into an alumina crucible, place it in a muffle furnace and bake at 900°C for 2h, and cool naturally to room temperature to obtain a light brown solid DyVO 4 , namely product II.

[0099] (3) Accurately weigh 0.0250g of product II and 0.9750g of product I, mix and grind in an agate mortar for 1 hour...

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Abstract

The invention discloses a method for preparing a composite photocatalyst-DyVO4 / g-C3N4 and the composite photocatalyst prepared by adopting the method. The raw materials used in the method are readily available, the preparation conditions are easy to realize, and the prepared composite photocatalyst is high in catalytic efficiency under visible light catalysis conditions.

Description

technical field [0001] The invention belongs to the field of photocatalysis, relates to a method for preparing a photocatalyst, in particular to a method for preparing a composite photocatalyst DyVO 4 / g -C 3 N 4 Methods. Background technique [0002] In recent years, with the rapid development of industrial production, the problem of environmental pollution has been widely concerned by people. With the continuous improvement of industrial pollution control technology, photocatalytic technology, that is, the use of solar energy to photocatalytically degrade pollutants, has been studied more and more deeply in environmental governance. [0003] Another way to study photocatalysts is to find new photocatalysts. However, a large number of experiments have proved that the photocatalytic efficiency of simply using a single substance as a photocatalyst is not high, while the catalytic effect of a composite photocatalyst is enhanced. [0004] Therefore, it has become a new top...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24
Inventor 崔玉民李慧泉苗慧陶栋梁
Owner FUYANG NORMAL UNIVERSITY
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