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Preparation method for phosphor-doped graphite-phase carbon nitride visible-light catalyst

A graphitic carbon nitride, visible light technology, applied in physical/chemical process catalysts, chemical instruments and methods, organic compound/hydride/coordination complex catalysts, etc., can solve the limitation of visible light absorption and utilization, and degrade pollutants Due to the limited improvement of photocatalytic activity, the effects of being suitable for large-scale production, simple preparation method and wide source of raw materials are achieved.

Inactive Publication Date: 2014-05-07
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned modified visible light catalyst effectively increases the specific surface area of ​​graphitic carbon nitride, provides more active sites, and improves the utilization rate of visible light, but also limits the absorption and utilization of visible light. Limited increase in activity

Method used

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  • Preparation method for phosphor-doped graphite-phase carbon nitride visible-light catalyst
  • Preparation method for phosphor-doped graphite-phase carbon nitride visible-light catalyst
  • Preparation method for phosphor-doped graphite-phase carbon nitride visible-light catalyst

Examples

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Effect test

Embodiment 1

[0022] Pipette 1 mL of dilute phosphoric acid solution with a concentration of 0.793 mol / L and add it to a beaker containing 5 mL of deionized water, stir for 10 min, then slowly add 5.00 g of melamine solid powder into the dilute phosphoric acid solution under stirring, and continue stirring for 50 min to make Phosphoric acid is uniformly adsorbed and dispersed on the surface of melamine particles. The resulting suspension was heated to 80°C with stirring to remove the solvent water, and then dried in an oven at 80°C for 2 h. Put the dried mixture in a crucible, cover the crucible and put it into a muffle furnace. First, heat up to 300°C within 15 minutes, keep the temperature constant for 1 hour, then raise the temperature to 350°C, keep the temperature constant for 1 hour, then raise the temperature to 400°C, keep the temperature constant 1h, then raise the temperature to 480°C, keep the temperature for 1h, then raise the temperature to 500°C, keep the temperature for 1h, a...

Embodiment 2

[0027] Pipette 0.5 mL of dilute phosphoric acid solution with a concentration of 0.793 mol / L and add it to a beaker containing 5 mL of deionized water, stir for 5 min, then slowly add 5.00 g of melamine solid powder into the dilute phosphoric acid solution under stirring, and continue stirring for 30 min. Make phosphoric acid evenly adsorbed and dispersed on the surface of melamine particles. The resulting suspension was heated to 80°C with stirring to remove the solvent water, and then dried in an oven at 80°C for 2 h. Put the dried mixture in a crucible, cover the crucible and put it into a muffle furnace. First, heat up to 300°C within 15 minutes, keep the temperature constant for 1 hour, then raise the temperature to 350°C, keep the temperature constant for 1 hour, then raise the temperature to 400°C, keep the temperature constant 1h, then raise the temperature to 480°C, keep the temperature for 1h, then raise the temperature to 500°C, keep the temperature for 1h, and fina...

Embodiment 3

[0029] Pipette 2.5 mL of dilute phosphoric acid solution with a concentration of 0.793 mol / L into a beaker containing 5 mL of deionized water, stir for 10 min, then slowly add 5.00 g of melamine solid powder into the dilute phosphoric acid solution while stirring, and continue stirring for 60 min. Make phosphoric acid evenly adsorbed and dispersed on the surface of melamine particles. The resulting suspension was heated to 80°C with stirring to remove the solvent water, and then dried in an oven at 80°C for 2 h. Put the dried mixture in a crucible, cover the crucible and put it into a muffle furnace. First, heat up to 300°C within 15 minutes, keep the temperature constant for 1 hour, then raise the temperature to 350°C, keep the temperature constant for 1 hour, then raise the temperature to 400°C, keep the temperature constant 1h, then raise the temperature to 480°C, keep the temperature for 1h, then raise the temperature to 500°C, keep the temperature for 1h, and finally rais...

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Abstract

The invention belongs to the technical field of environment purification photocatalytic material and discloses a preparation method for a phosphor-doped graphite-phase carbon nitride visible-light catalyst. The method comprises the following steps: dispersing melamine into a dilute phosphoric acid solution to enable phosphoric acid molecules to be uniformly adsorbed and dispersed to the surface of melamine particles; then heating to remove solvent water, and after the melamine particles are fully dried, performing programmed heating on the dried melamine particles to 520 DEG C to enable the melamine to generate thermal polycondensation; and cooling and grinding a product to obtain the phosphor-doped graphite-phase carbon nitride visible-light catalyst. The raw materials of the phosphor-doped graphite-phase carbon nitride visible-light catalyst are readily available; the preparation method is simple; complicated equipment is not needed; the preparation method is suitable for large-scale production; the prepared phosphor-doped graphite-phase carbon nitride composite visible-light catalyst is high in visible-light catalysis performance and high in catalysis stability.

Description

technical field [0001] The invention specifically relates to a preparation method of a phosphorus-doped graphite-phase carbon nitride visible light catalyst, which belongs to the technical field of preparation of photocatalyst materials for environmental purification. Background technique [0002] Photocatalytic technology is a green technology with important application prospects in the energy field. Photocatalytic oxidation technology uses semiconductors as catalysts and light energy as energy to degrade organic pollutants into carbon dioxide and water. Since the discovery in 1972 that nano-titanium dioxide can split water under light, nano-semiconductor photocatalysis technology has attracted worldwide attention and is considered to be the most promising and promising environmental purification technology. In recent years, many scholars at home and abroad have conducted in-depth and extensive research on various types of nano-semiconductor materials such as metal oxides, ...

Claims

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Application Information

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IPC IPC(8): B01J31/06B01J27/24A62D3/17A62D101/26A62D101/28
Inventor 王德松张鑫鑫罗青枝李雪艳安静殷蓉
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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