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

A high-salt wastewater and photocatalyst technology, applied in the field of photocatalysis, can solve problems such as unsatisfactory dye treatment effects, achieve the effects of improving photocatalysis effects, good separation effects, and reducing operating costs

Inactive Publication Date: 2020-09-15
TIANJIN 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-salinity wastewater, and preparation method thereof
  • Photocatalyst for treating dye in high-salinity wastewater, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Put melamine into a crucible with a lid, put it in a muffle furnace, raise the temperature to 400°C at a heating rate of 1°C / min, keep it for 100min, cool to room temperature, and obtain a yellow powder; then mix it with a certain amount of Mix with ionic water (the mass percentage of water is 99.5%), after ultrasonication at room temperature for 0.5h, pour it into a hydrothermal kettle, heat at 120°C for 6h, cool to room temperature and centrifuge, and put the obtained solid matter in an oven Dry at 40°C for 5 hours to obtain a khaki solid; then grind it with bismuth nitrate (molar ratio 1:4×10-4), put it into a crucible with a lid, and heat up at a heating rate of 1°C / min After keeping at 400° C. for 3 hours, it was cooled to room temperature to obtain a photocatalyst of bismuth oxycarbonate nanoparticles supported by porous graphite nitrogen carbide nanosheets.

[0036] Depend on figure 1 It can be seen that, through the detection of nitrogen adsorption-desorption t...

Embodiment 2

[0041] 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 500min, then cool to room temperature to obtain a yellow powder; then mix it with a certain amount of Ionized water was mixed (the mass percentage of water was 98.5%), after being ultrasonicated for 3 hours at room temperature, poured into a hydrothermal kettle, heated at 240°C for 30 hours, cooled to room temperature and centrifuged, the obtained solid matter was placed in an oven for 100 Dry at ℃ for 30h to obtain a khaki solid; then grind it with bismuth nitrate (molar ratio: 1:4×10-2), put it into a crucible with a lid, and raise the temperature to 5°C / min at a heating rate of After keeping at 600° C. for 6 hours, it was cooled to room temperature to obtain a photocatalyst of bismuth oxycarbonate nanoparticles supported by porous graphite nitrogen carbide nanosheets.

[0042] Evaluation conditions: In 40 mg / L of methyl orange-contai...

Embodiment 3

[0044] 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 minutes, and cool it to room temperature to obtain a yellow powder; then mix it with a certain amount of Mix with ionic water (the mass percentage of water is 99.0%), after ultrasonication at room temperature for 1h, pour it 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 for 70 Dry at ℃ for 10 hours to obtain a khaki solid; then grind it with bismuth nitrate (molar ratio: 1:8×10-3), put it into a crucible with a lid, and raise the temperature to 2.5°C / min at a heating rate of After keeping at 500° C. for 4 hours, it was cooled to room temperature to obtain a photocatalyst of bismuth oxycarbonate nanoparticles supported by porous graphite nitrogen carbide nanosheets.

[0045] Evaluation conditions: In 20mg / L high-salt dye wastewater containing...

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Abstract

The invention discloses a photocatalyst for treating dye in high-salinity wastewater, and a preparation method thereof, and belongs to the field of photocatalysis. The photocatalyst disclosed by the invention takes a porous graphite phase nitrogen carbide nanosheet as a carrier, and bismuth subcarbonate nanoparticles are loaded on the porous graphite phase nitrogen carbide nanosheet carrier. The obtained catalyst can catalyze and treat the dye in high-salinity wastewater under visible light, and has the advantages of response under visible light, low cost and high degradation rate. In the preparation process of the catalyst, graphite-phase nitrogen carbide subjected to hydrothermal treatment and bismuth nitrate are directly ground and roasted to make bismuth oxycarbonate particles generated on the surface of the nitrogen carbide carrier in situ, and the catalytic reaction stability of the photocatalyst is improved by utilizing the strong interaction force of the graphite-phase nitrogencarbide and the bismuth nitrate. In addition, no organic solvent is introduced in the preparation process, so environmental protection is achieved, the process is simple, and industrial production isfacilitated.

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] 1. 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] 2. 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. TiO2 photocatalyst has the advantages of cheap, non-toxic, high activity, etc.,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/30C02F101/30C02F101/38
CPCB01J27/24B01J35/004C02F1/30C02F2101/308C02F2101/38C02F2101/40C02F2305/023C02F2305/10
Inventor 那平骆艳芳韩晴玉李萌
Owner TIANJIN UNIV
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