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Novel C3N4/ZnO/Fe2O3 composite photocatalyst and preparation method as well as application thereof

A composite catalyst, C3N4 technology, applied in the chemical field, can solve the problems of operator casualties, environmental pollution, low degradation rate of methylene blue, etc., and achieve the effect of improving the utilization rate

Active Publication Date: 2014-04-23
安徽丰华医药包装有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this preparation method requires the use of corrosive chemical ammonium bifluoride, which will generate toxic fluoride when it meets water, which will not only pollute the environment, but may also cause casualties to operators. At the same time, the prepared cobalt-loaded The catalytic activity of mesoporous graphitic carbon nitride catalyst for visible light is not stable, and its degradation rate to methylene blue is only 45%

Method used

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  • Novel C3N4/ZnO/Fe2O3 composite photocatalyst and preparation method as well as application thereof
  • Novel C3N4/ZnO/Fe2O3 composite photocatalyst and preparation method as well as application thereof
  • Novel C3N4/ZnO/Fe2O3 composite photocatalyst and preparation method as well as application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] (1) Accurately weigh 3.0g of dicyandiamide and 0.2928g of barbituric acid, put them in a 200mL beaker, add 15mL of distilled water and stir evenly, place the beaker in a 90°C CHH-4 constant temperature water bath, and keep stirring until Evaporate the water in the beaker to dryness; take out the beaker and place it in a blast drying oven at 100°C until the mixture is dry; grind the mixture into a crucible and place it in a muffle furnace, calcinate at 550°C for 5.0h, and wait to cool to room temperature After grinding finely, C 3 N 4 catalyst;

[0076] (2) Accurately weigh 1.629g of ferric nitrate nonahydrate and 0.220g of zinc nitrate hexahydrate, put the above-mentioned three reagents in a 20mL beaker, add 10mL of deionized water, add a stirring magnet after the dissolution is complete, and put The mixed solution was stirred on a magnetic stirrer for 30 minutes, and the evenly stirred beaker was placed in a 90°C constant temperature water bath until the solvent was ...

Embodiment 2

[0079] (1) Accurately weigh 5.0g of melamine and 1.0g of barbituric acid, put them in a beaker, add 10mL of distilled water and stir evenly, place the beaker in a constant temperature water bath at 80°C, and keep stirring until the water in the beaker evaporates to dryness; take out Place the beaker in a blast drying oven at 80°C until the mixture is dry; grind the mixture into a crucible and place it in a muffle furnace, calcinate at 530°C for 5.0h, cool to room temperature, and grind to obtain C 3 N 4 catalyst;

[0080] (2) Accurately weigh 3.257g of anhydrous ferric nitrate and 0.440g of anhydrous zinc nitrate, put the above three reagents in a beaker, add 15mL of deionized water, add a stirring magnet after the dissolution is complete, and mix The solution was stirred on a magnetic stirrer for 30 minutes, and the evenly stirred beaker was placed in a 90°C constant temperature water bath until the solvent was evaporated to dryness, and the mixture after the solvent was eva...

Embodiment 3

[0083] (1) Accurately weigh 15.0g of dicyandiamide and 1.0g of barbituric acid, put them in a beaker, add 30mL of distilled water and stir evenly, place the beaker in a constant temperature water bath at 100°C, and keep stirring until the water in the beaker evaporates Dry; take out the beaker and place it in a blast drying oven at 110°C until the mixture is dry; grind the mixture into a crucible and place it in a muffle furnace, calcinate at 570°C for 7.0h, and grind it after cooling to room temperature. Made C 3 N 4 catalyst;

[0084] (2) Accurately weigh 2.600g of ferric nitrate nonahydrate and 0.09167g of zinc nitrate hexahydrate, put the above three reagents in a beaker, add 5mL of deionized water, add a stirring magnet after the dissolution is complete, and mix The solution was stirred on a magnetic stirrer for 30 minutes, and the evenly stirred beaker was placed in a constant temperature water bath at 80°C until the solvent was evaporated to dryness, and the mixture a...

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Abstract

The invention discloses a novel C3N4 / ZnO / Fe2O3 composite photocatalyst and a preparation method thereof. The method comprises the following steps: preparing a carbon nitride (C3N4) catalyst and a ZnO / Fe2O3 catalyst, then mixing according to the proportion, grinding and preparing the C3N4 / ZnO / Fe2O3 composite photocatalyst. The novel C3N4 / ZnO / Fe2O3 composite photocatalyst has the advantages that the photocatalytic efficiency is high, photocatalysis can be carried out in the range of ultraviolet band and visible light wavelength, the application range is wider, high-efficiency degradation can be carried out on wastewater, especially pollutants in the dye wastewater, the degradation is thorough and the used time is short; the method is simple in operation, mild in reaction condition, does not use toxic and harmful substances as materials, and is green and environment-friendly, thus avoiding secondary pollution.

Description

technical field [0001] The invention relates to the field of chemistry, in particular to a preparation method and application of a photocatalyst for treating waste water pollution. Background technique [0002] In recent years, with the rapid development of industrial production, the problems of energy and environmental pollution have been widely concerned by people. The requirements for industrial pollution control technology are increasing, and there are more and more researches on photocatalytic technology in environmental control. The use of solar energy to photocatalyze the degradation of pollutants has been one of the hotspots of research. Under the irradiation of light, semiconductor materials can promote the synthesis of compounds or degrade compounds by converting light energy into chemical energy. This is the so-called photocatalytic technology. [0003] Usually TiO 2 As a catalyst for environmental purification, for example, Huang Juanru et al reported TiO in I...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/30C02F1/32
CPCY02W10/37
Inventor 崔玉民李慧泉苗慧
Owner 安徽丰华医药包装有限公司
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