Photocatalyst for treating dye in high-salt wastewater and preparation method thereof

A high-salt wastewater and photocatalyst technology, applied in the field of photocatalysis, can solve the problems of unsatisfactory dye treatment effect, achieve the effects of improving photocatalytic effect, enriching raw material preparation, and reducing operating costs

Active Publication Date: 2020-04-07
BINZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to make up for the deficiencies of the prior art and solve the unsatisfactory treatment effect of dyes in high-salt wastewater in the prior art, the present invention provides a photocatalyst for treating dyes in high-salt wastewater and its preparation method

Method used

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  • Photocatalyst for treating dye in high-salt wastewater and preparation method thereof
  • Photocatalyst for treating dye in high-salt wastewater and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Put melamine into a crucible with a lid, place it in a muffle furnace, raise the temperature to 400°C at a rate of 1°C / min, keep it for 100 min, and cool it to room temperature to obtain a yellow powder; then mix it with a certain amount of Mixed with deionized water (the mass percentage of water is 99.5%), ultrasonicated at room temperature for 0.5h, poured into a hydrothermal kettle, heated at 120°C for 6h, cooled to room temperature and centrifuged, and the obtained solid matter was Dry in an oven at 40°C for 5 hours to obtain a khaki solid; then mix with bismuth nitrate (molar ratio 1:4×10 -4 ) for grinding, and then put it into a crucible with a lid, raise the temperature to 400°C at a heating rate of 1°C / min, keep it for 3h, and then cool to room temperature to obtain the optical fiber of bismuth oxycarbonate nanoparticles supported by porous graphite nitrogen carbide nanosheets. catalyst.

[0034] Depend on figure 1 It can be seen that through the detection of ...

Embodiment 2

[0039] Put melamine into a crucible with a lid, place it in a muffle furnace, raise the temperature to 600 °C at a rate of 5 °C / min, keep it for 500 min, and cool it to room temperature to obtain a yellow powder; then mix it with a certain amount of Mix with deionized water (the mass percentage of water is 98.5%), after ultrasonication at room temperature for 3 hours, pour it into a hydrothermal kettle, heat at 240°C for 30 hours, cool to room temperature and centrifuge, and put the obtained solid matter in an oven Dry at 100°C for 30h to obtain a khaki solid; then mix with bismuth nitrate (molar ratio 1:4×10 -2) for grinding, and then put it into a crucible with a lid, raise the temperature to 600°C at a heating rate of 5°C / min, keep it for 6h, and cool to room temperature to obtain porous graphite nitrogen carbide nanosheets loaded with bismuth oxycarbonate nanoparticles catalyst of light.

[0040] Evaluation conditions: In 40 mg / L high-salt dye wastewater containing methyl...

Embodiment 3

[0042] Put melamine into a crucible with a lid, place it in a muffle furnace, raise the temperature to 530 °C at a rate of 2.5 °C / min, keep it for 200 min, and cool it to room temperature to obtain a yellow powder; then mix it with a certain amount of Mix with deionized water (the mass percentage of water is 99.0%), after ultrasonication at room temperature for 1h, pour into a hydrothermal kettle, heat at 180°C for 12h, cool to room temperature and centrifuge, and put the obtained solid matter in an oven Dry at 70°C for 10 hours to obtain a khaki solid; then mix with bismuth nitrate (molar ratio 1:8×10 -3 ) for grinding, and then put it into a crucible with a lid, raise the temperature to 500°C at a heating rate of 2.5°C / min, keep it for 4h, and then cool to room temperature to obtain porous graphite nitrogen carbide nanosheets loaded with bismuth oxycarbonate nanoparticles catalyst of light.

[0043] Evaluation conditions: In high-salt dye wastewater containing 20 mg / L rhoda...

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Abstract

The invention discloses a photocatalyst for treating dye in high-salt wastewater and a preparation method of the photocatalyst and belongs to the field of photocatalysis. The photocatalyst uses porousgraphite phase nitrogen carbide nanosheets as the supporter to support bismuth subcarbonate nano particles. The photocatalyst can catalytically treat the dye in the high-salt wastewater under visiblelight, can respond under the visible light and is low in cost and high in degradation rate. The preparation method has the advantages that graphite phase nitrogen carbide and bismuth nitrate are directly subjected to grinding and calcining, so that the bismuth subcarbonate particles are generated on the surface of the nitrogen carbide supporter in an in-situ manner, and the catalytic reaction stability of the photocatalyst is increased by the intense interaction force between the bismuth subcarbonate particles and the nitrogen carbide supporter; in addition, no organic solvents are introducedin the preparation process, so that the preparation method is simple in process and beneficial to industrial production.

Description

technical field [0001] The invention relates to the field of photocatalysis, in particular to a photocatalyst for treating dyes in high-salt wastewater and a preparation method thereof. Background technique [0002] With the rapid development of textile industrialization, the discharge of a large amount of printing and dyeing wastewater seriously threatens the natural environment and human health. Printing and dyeing wastewater has the characteristics of deep color, strong toxicity, refractory degradation, large pH fluctuations, etc., and often has a high content of inorganic salts, and it is difficult to effectively treat it by conventional methods. [0003] In recent years, photocatalytic oxidation, as a deep oxidation method, has been recognized as the most promising pollutant removal technology due to its low energy consumption, mild reaction conditions, simple operation, and low cost. TiO 2 Photocatalyst has the advantages of cheap, non-toxic, high activity, etc., but...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24C02F1/30C02F1/72C02F101/30C02F103/30
CPCB01J27/24B01J35/004C02F1/30C02F1/725C02F2101/308C02F2103/30C02F2305/10
Inventor 段永正商希礼贾冬梅郑晶静姚海波李长海
Owner BINZHOU UNIV
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