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A catalyst composition capable of treating methylene blue wastewater, its preparation method and application

A methylene blue and methylene blue dye technology, applied in the field of ternary composite oxide K2CuMo2O8 catalyst and preparation, can solve the problems of long degradation time and unsatisfactory degradation efficiency, and achieve simple, fast and efficient degradation without secondary pollution. Effect

Inactive Publication Date: 2017-12-08
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The inventor of this patent application has previously disclosed several prior art related to this patent application, for example, the patent application with application number 201410598642.6 "a catalyst composition for degrading methylene blue dye in wastewater and its preparation method and application" and the patent application number 201210474494.8 "a catalyst composition for treating methylene blue dye wastewater and its preparation method and application", these two applications adopt the general formula M 2 O·Cr 2 o 3 • xWO 3 and Na 2 O·Cr 2 o 3 • xMoO 3 (x=1~8) ternary composite oxide is used as a catalyst to degrade methylene blue dye wastewater, but the degradation time is long or the degradation efficiency is not ideal. Therefore, a new catalyst composition or composite oxide still needs to be developed. While reducing the degradation time of the above-mentioned dyes, the degradation rate is improved, and the patent application of the present invention is also the result of the inventor's further research on the basis of the aforementioned work

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1.76g potassium nitrate (1.74´10 -2 mol), 2.10g copper nitrate trihydrate (8.69´10 -3 mol), 3.10g ammonium molybdate tetrahydrate (2.51´10 -3 mol) and 18.30g citric acid (9.34´10 -2 mol) into 60mL (3.33 mol) of distilled water in sequence, stirring to dissolve. After adding 23.22 g of ethylene glycol (0.37 mol), stir for 10 min, raise the temperature to 120°C and continue stirring until a gel is formed. The gel was heated at 400°C for 7 hours to obtain a powdery ternary composite oxide K 2 CuMo 2 o 8 catalyst.

[0030] Get 0.10 gram of the ternary composite oxide K prepared by the above-mentioned method 2 CuMo 2 o 8 Catalyst degradation of methylene blue wastewater. The concentration of methylene blue is 10 mg / L, and the volume is 40 mL. Catalytically degrade methylene blue at room temperature and pressure for 10 minutes under stirring. Then, centrifuge for 10 minutes in a centrifuge to take the supernatant. Absorbance was measured at the wavelength of m...

Embodiment 2

[0034] 1.76g potassium nitrate (1.74´10 -2 mol), 2.10g copper nitrate trihydrate (8.69´10 -3 mol), 3.10g ammonium molybdate tetrahydrate (2.51´10 -3 mol) and 18.30g citric acid (9.34´10 -2 mol) into 60mL (3.33 mol) of distilled water in sequence, stirring to dissolve. After adding 23.22 g of ethylene glycol (0.37 mol), stir for 10 min, raise the temperature to 120°C and continue stirring until a gel is formed. The gel was heated at 550°C for 7 hours to obtain a powdery ternary composite oxide K 2 CuMo 2 o 8 catalyst.

[0035] Get 0.10 gram of the ternary composite oxide K prepared by the above-mentioned method 2 CuMo 2 o 8 Catalyst degradation of methylene blue wastewater. The concentration of methylene blue is 10 mg / L, and the volume is 40 mL. Catalytically degrade methylene blue at room temperature and pressure for 10 minutes under stirring. Then, centrifuge for 10 minutes in a centrifuge to take the supernatant. Absorbance was measured at the wavelength of max...

Embodiment 3

[0037] 1.76g potassium nitrate (1.74´10 -2 mol), 2.10g copper nitrate trihydrate (8.69´10 -3 mol), 3.10g ammonium molybdate tetrahydrate (2.51´10 -3 mol) and 18.30g citric acid (9.34´10 -2 mol) into 60mL (3.33 mol) of distilled water in sequence, stirring to dissolve. After adding 23.22 g of ethylene glycol (0.37 mol), stir for 10 min, raise the temperature to 120°C and continue stirring until a gel is formed. The gel was heated at 900°C for 7 hours to obtain a powdery ternary composite oxide K 2 CuMo 2 o 8 catalyst.

[0038] Get 0.10 gram of K prepared by the above method 2 CuMo 2 o 8 Catalyst degradation of methylene blue wastewater. The concentration of methylene blue is 10 mg / L, and the volume is 40 mL. Catalytically degrade methylene blue at room temperature and pressure for 10 minutes under stirring. Then, centrifuge for 10 minutes in a centrifuge to take the supernatant. Absorbance was measured at the wavelength of maximum absorption of methylene blue (6...

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Abstract

The invention discloses a catalyst composition capable of treating methylene blue wastewater, a preparation method and application thereof. In the present invention, potassium compound, copper salt, molybdate and citric acid are sequentially added into water, stirred and dissolved, then a certain amount of ethylene glycol is added, heated to 100-130°C, particularly preferably 120°C, and continued to stir to form a gel Calcining the gel at 300-1000°C for 4-15 hours, particularly preferably at 400-900°C for 7 hours, to obtain a ternary composite oxide K2CuMo2O8 catalyst. The catalyst of the present invention can effectively treat methylene blue dye wastewater at normal temperature and pressure without oxidant or light irradiation, has the advantages of simple and fast preparation, fast degradation of organic pollutants and significant effect, low treatment cost, and no secondary pollution, etc. advantage.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic functional materials, relates to a catalyst composition capable of treating methylene blue wastewater, in particular to a ternary composite oxide K capable of treating methylene blue wastewater 2 CuMo 2 o 8 Catalyst and preparation method and application. Background technique [0002] At present, organic dye wastewater has become one of the main sources of water pollution. The wastewater has the characteristics of large water volume, high concentration, complex composition, deep color and refractory degradation. Most dyes also have toxic, carcinogenic, teratogenic and mutagenic effects. Methylene blue is an important organic chemical synthetic cationic dye with a wide range of industrial applications. For example, it can be applied to the dyeing of hemp, silk fabrics, paper, bamboo and wood, the dyeing of biological and bacterial tissues, and the manufacture of ink and color ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/887C02F1/58C02F1/00C02F103/30
Inventor 周国华孙丽霞
Owner HUBEI UNIV OF TECH