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Application of cupric borate as visible light catalyst for degrading dye wastewater

A technology for dye wastewater and catalytic degradation, which is applied in the field of photocatalytic treatment, can solve the problems of low utilization rate of visible light, large forbidden band width, etc., and achieves the effect of simple and easy preparation method and strong light degradation ability.

Active Publication Date: 2014-03-19
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The problem to be solved by the present invention is: to overcome the current traditional photocatalytic reagents (such as TiO 2 ) problems such as large band gap and low utilization rate of visible light, a new type of visible light catalyst copper borate (Cu 3 B 2 o 6 ), for the catalytic degradation of organic dyes under visible light, especially for methylene blue

Method used

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  • Application of cupric borate as visible light catalyst for degrading dye wastewater
  • Application of cupric borate as visible light catalyst for degrading dye wastewater
  • Application of cupric borate as visible light catalyst for degrading dye wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Weigh 2.5mmol (0.5g) of copper acetate (Cu(CH 3 COO) 2 ·H 2 O), 7.5mmol glucose (1.35g) was dissolved in 20mL distilled water, and magnetically stirred for 2h. Dissolve 2.5mmol (1.55g) of boric acid in 30mL of deionized water, then add the boric acid aqueous solution to the aforementioned reaction solution, and stir magnetically for 2h. Then dry the mixed solution in an oven at 150°C to obtain a brown xerogel, which is then roasted at 850°C for 6 hours to obtain a dark green powder, which is washed with 0.1mol / L hydrochloric acid and deionized water at 60°C respectively 3 to 4 times, centrifuge, and dry the powder at 60°C to obtain Cu 3 B 2 o 6 Single crystal 0.21g. Detected by XRD, as attached figure 1 As shown, the resulting Cu 3 B 2 o 6 It is a pure substance, the corresponding PDF card number: 28-398; tested by SEM, if attached figure 2 As shown, sample Cu 3 B 2 o 6 It is rod-shaped, with a diameter of about 300-600 nm and a length of about 6 μm.

[...

Embodiment 2

[0034] Take by weighing 2.5mmol of copper nitrate (Cu(NO 3 ) 2 ·3H 2 O), 5.0mmol malic acid was dissolved in 20mL distilled water, and magnetically stirred for 3h. Dissolve 2.5 mmol of boric acid in 30 mL of deionized water, and then add this solution dropwise to the aforementioned reaction solution, and magnetically stir for 4 h. Then the mixed solution was dried in an oven at 140°C to obtain a brown gel, which was roasted at 900°C for 7 hours to obtain a dark green powder, which was washed with 0.21mol / L hydrochloric acid and deionized water at 80°C for 3-3 hours. 4 times, centrifuged, and the powder was dried at 80°C to obtain Cu 3 B 2 o 6 sample. After XRD detection, the results are attached figure 1 , the resulting Cu 3 B 2 o 6 It is a pure substance, corresponding PDF card number: 28-398; tested by HRTEM, as attached image 3 shown, indicating that the prepared Cu 3 B 2 o 6 a single crystal structure. After the UV-vis test, the UV-visible diffuse reflectan...

Embodiment 3

[0037] Take by weighing 2.5mmol of copper nitrate (Cu(NO 3 ) 2 ·3H 2 O), 7.5mmol glucose was dissolved in 20mL distilled water, and magnetically stirred for 3h. Dissolve 1.75 mmol of boric acid in 30 mL of deionized water, and then add this solution dropwise to the aforementioned reaction solution, and magnetically stir for 2 h. Then dry the mixture in an oven at 120°C to obtain a brown gel, which is then roasted at 850°C for 7 hours to obtain a dark green powder, which is washed with 0.4mol / L hydrochloric acid and deionized water at 80°C for 3-3 hours. 4 times, centrifuged, and the powder was dried at 60°C to obtain Cu 3 B 2 o 6 sample. As in Example 1, the resulting Cu 3 B 2 o 6 It is a pure substance and has a single crystal structure.

[0038] Take 40mg of Cu obtained above 3 B 2 o 6 Add 35mL methylene blue solution (35mg / L) to the powder, react under the conditions of 600nm visible light, 25°C, 1200rpm, take samples regularly and determine the concentration o...

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Abstract

The invention discloses the application of cupric borate Cu3B2O6 as a visible light catalyst. Specifically, cupric borate can be used as a visible light catalyst for degrading organic dye wastewater under the condition of visible light, and especially can be used for carrying out visible light catalytic degradation on dye wastewater containing methylene blue. The invention also discloses a specific application method. According to the invention, provided Cu3B2O6 powder is added into a methylene blue solution, then a photocatalytic degradation reaction is performed under the condition of visible light (wavelength: 420-800 nm), and the removal ratio of methylene blue in water is as high as 99.52%, therefore, cupric borate Cu3B2O6 is high in photocatalytic degradation ability, and advantageous to the industrialization of a Cu3B2O6 photocatalytic dye wastewater treatment technology.

Description

(1) Technical field [0001] The invention relates to a novel visible light catalyst copper borate used for photocatalytic treatment of dye wastewater, which belongs to the photocatalytic technology in environmental treatment. (2) Background technology [0002] In the 21st century, with the improvement of industrialization, the problem of environmental pollution has become increasingly serious, and the treatment of dye wastewater is particularly difficult. Dye wastewater usually contains some highly toxic and refractory organic pollutants. Due to the high concentration of pollutants, complex components, and poor biodegradability, it is difficult to effectively treat them by conventional methods, thus causing harm to human health and biodiversity. huge threat. [0003] As a deep oxidation method, photocatalysis has been recognized as the most promising pollutant removal technology. However, after more than 30 years of extensive and in-depth research, it is still difficult for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F103/30
CPCY02W10/37
Inventor 陈爱民邵晨熠薄盈盈胡军汪晶
Owner ZHEJIANG UNIV OF TECH
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